IEEE / NON IEEE / REAL TIME PROJECTS: Power Electronics and Power Systems Projects for the year 2018-2019. CATEGORY: 1. ENGINEERING. 2. POLYTECHNIC.

1. IEEE – 2018/2019 POWER ELECTRONICS AND DRIVES TITLES:
PRODUCTION OF ELECTRICITY BY USING GRAVITATIONAL AND
MAGNETIC ENERGY
Abstract:
The electricity requirements of the world including India are increasing at alarming rate and
the power demand has been running ahead of supply. It is also now widely recognized that
the fossil fuels (i.e., coal, petroleum and natural gas) and other conventional resources,
presently being used for generation of electrical energy, may not be either sufficient or
suitable to keep pace with ever increasing demand of the electrical energy of the world. Also
generation of electrical power by cold based steam power plant or nuclear power plants
causes pollution, which is likely to be more acute in future due to large generating capacity
on one side and greater awareness of the people in this respect. The recent severe energy
crisis has forced the world to develop new and alternative methods of power generation,
which could not be adopted so far due to various reasons [4]. The magneto-hydro-dynamic
(MHD) power generation is one of the examples of a new unique method of power
generation. The other non-conventional methods of power generation may be such as solar
cells, fuel cells, thermo-electric generator, thermionic converter, solar power generation,
wind power generation, geo-thermal energy generation, tidal power generation etc. This
paper elucidates about Different Energy sources, why we are going for non-conventional
energy sources, Different non-conventional energy sources & comparison between them,
and implementation of best non-conventional source of energy the Gravitational Energy.
INTEGRATED WIND, SOLAR, AND ENERGY STORAGE: DESIGNING PLANTS
WITH A BETTER GENERATION PROFILE AND LOWER OVERALL COST.
Abstract:
Collocating wind and solar generation with battery energy storage is a concept garnering
much attention lately. An integrated wind, solar, and energy storage (IWSES) plant has
a far better generation profile than standalone wind or solar plants. It results in better
use of the transmission evacuation system, which, in turn, provides a lower overall plant
cost compared to standalone wind and solar plants of the same generating capacity. IWSES
plants are particularly suitable for regions that have set high targets for wind and solar
generation but have limited land available for project development
AN IMPROVED ADAPTIVE P&O TECHNIQUE FOR TWO STAGE GRID
INTERFACED SPVECS.
Abstract:
This work presents an improved perturb and observe with adaptive perturbation size
(IAP&O) algorithm for harnessing maximum power from a double stage solar photovoltaic
(PV) energy conversion system (SPVECS) interfaced to a three phase distribution grid.
Among various MPPT (Maximum Power Point Technique) techniques, the P&O method is
most popular technique in industrial and domestic applications because of its simplicity.
However, its performance is affected from drift problem and it is increased in quick changes
of environmental conditions. In this double stage SPVECS, a VSI (Voltage Source Inverter)

2. to a three phase distribution grid is deployed. To ensure the quality of power as per an
IEEE-519 std. on harmonics, it has maintained the power quality norms in three phase
distribution feeder network. Therefore, to feed the real power to the three phase
distribution network and to maintain the sinusoidal grid currents, this system
performs well. The Matlab/Simulink is utilized for simulation purpose and the
performance of proposed system is examined in different environmental situations on
an experimental prototype, which is established in the laboratory.
ENERGY STORAGE CONTROL FOR DISPATCHING PHOTOVOLTAIC POWER
Abstract:
The strong growth of the solar power generation industry requires an increasing need to
predict the profile of solar power production over a day and develop highly efficient and
optimized stand-alone and grid-connected photovoltaic systems. Moreover, the
opportunities offered by Battery Energy Storage Systems (BESSs) coupled with PV
systems require an ability to forecast the load power to optimize the size of the entire
system composed of PV panels and storage devices. This paper presents a sizing and
control strategy of BESSs for dispatching a photovoltaic generation farm in the 1-hour
ahead and day-ahead markets. The forecasting of the solar irradiation and load power
consumption is performed by developing a predictive model based on a feedforward neural
network trained with the Levenberg-Marquardt back-propagation learning algorithm.
OPERATION OF A GRID-TIED CMC BASED ON A SIC FORWARD SST UNDER
UNBALANCED PV POWER GENERATION
Abstract:
The application of Cascaded Multilevel Converters (CMC) in large-scale photovoltaic
plants connected to the utility grid has many advantages, such as the absence of sinusoidal
filters and line-frequency transformers. Improved overall performance under partial shading
conditions is possible due to the distribution of arrays among a large number of maximum
power point trackers. In this situation, although the cells operate at different power levels,
the three-phase currents injected into the point of common coupling must be balanced. A
suitable control technique is required to achieve this goal. This paper presents a complete
algorithm to handle three-phase power balance and single-phase power harvesting
simultaneously. Simulation results assuming a medium-voltage system connected to a
typical utility-grid illustrate the dynamic and steady-state performance capability of the
proposed strategy. Experimental results from a low-voltage, solid state transformer-based,
three-cell prototype are also included.

3. A NOVEL NON-ISOLATED Z-SOURCE DC-DC CONVERTER FOR
PHOTOVOLTAIC APPLICATIONS
Abstract:
Pollution problems caused by fossil fuels has lead more investigations on renewable energy
systems. Photo-voltaic cells and fuel-cells output low level voltage than required, therefore,
high gain dc-dc converters are used to boost this low voltage. The Z-source converter can be
employed as dc-dc converter to boost the PV panel voltages. It also offers other advantages,
such as clamped switched voltage, high voltage gain, isolation of energy source from the load
and positive polarity for output voltage. Therefore, this is a good choice for high step-up
applications. This paper presents analysis of a novel high stepup z-source based dc-dc
converter that has higher voltage gain than the z-source converter. Furthermore, high
efficiency, low device voltage stress and wide voltage gain range make it a good candidate
for photo-voltaic and high voltage step-up applications. The proposed dc-dc converter is
evaluated experimentally for converting 24 V DC input to 300 V DC output at 100 W and to
validate the simulation results.
INTELLIGENT CONTROL SCHEME FOR SPV-WIND-BESS BASED MICRO
GRID
Abstract:
This article proposes a novel control scheme for efficient control of solar photovoltaic
(SPV), wind energy system (WES) and battery energy storage system (BESS) based micro-
grid. Using this control scheme the voltage in the main DC bus is kept constant irrespective
of the load or weather condition. When power requirement at load side is less than the
energy produced by both SPV and WES combined, the batteries are charged and in case of
any imbalance or excess energy required in case of peak load conditions the BESS provides
the remaining energy. The dc voltage thus obtained is converted into ac voltage by using a
three-phase inverter, which is operated with sinusoidal pulse width modulation (PWM)
technique. The system is designed and tested in MATLAB-SIMULINK and simulated
results are demonstrated to validate the concept and design. On account of simulation
results, it has been established that the performance of the controllers is quite satisfactory in
both transient and steady states.
DESIGN OF A REAL-TIME, LOW-COST MONITORING SYSTEM FOR HYBRID
SOLAR-WIND POWER GENERATION SYSTEM
Abstract:

4. This paper presents the project of a real-time low-cost monitoring system for the hybrid
solar-wind electric power generation system, installed at the Fluminense Federal University.
The objective of the system presented is to monitor the electrical magnitudes of the hybrid
system, allowing the user to see in real time the operating status of the hybrid system, in
order to obtain information on generation of the photovoltaic and wind system, as well as
the consumption of the loads. Considering the low cost of implementing the monitoring
system, we chose to use the free prototyping platform Arduino. The Arduino board collects
the reading of the voltage and current sensors, processes and obtains power and energy
generation information from each of the sources, as well as the battery and the loads
connected to the hybrid system. Once the quantities to be monitored have been processed by
the Arduino microcontroller, it sends them to the computer via a USB port and through the
execution of a macro in Excel, the data is then imported into an spreadsheet. A small-scale
model of the hybrid system was developed to establish a proof of concept of the proposed
monitoring system
SOLAR POWER GENERATION FORECASTING WITH A LASSO-BASED
APPROACH
Abstract:
The smart grid (SG) has emerged as an important form of the Internet of Things. Despite the
high promises of renewable energy in the SG, it brings about great challenges to the existing
power grid due to its nature of intermittent and uncontrollable generation. In order to fully
harvest its potential, accurate forecasting of renewable power generation is indispensable for
effective power management. In this paper, we propose a least absolute shrinkage and
selection operator (LASSO)-based forecasting model and algorithm for solar power
generation forecasting. We compare the proposed scheme with two representative schemes
with three real world datasets. We find that the LASSO-based algorithm achieves a
considerably higher accuracy comparing to the existing methods, using fewer training data,
and being robust to anomaly data points in the training data, and its variable selection
capability also offers a convenient tradeoff between complexity and accuracy, which all
make the proposed LASSO-based approach a highly competitive solution to forecasting of
solar power generation.
A DC-DC BOOST CONVERTER WITH A WIDE INPUT RANGE AND HIGH
VOLTAGE GAIN FOR FUEL CELL VEHICLES
Abstract:
In fuel cell vehicles, the output voltage of the fuel cell source is typically
much lower than the voltage required by the DC bus and also this output voltage drops
significantly as the output current increases. In order to match the output voltage of the fuel
cell source to the DC bus voltage, a new DC-DC boost converter with a wide input range
and high voltage gain is proposed to act as the required power interface, which reduces
voltage stress across the power devices and operates with an acceptable conversion
efficiency. A prototype rated at 300W/400V has been developed and the maximum

5. efficiency of the proposed converter was measured as 95.01% at 300W. Experimental
results are presented to validate the effectiveness of the proposed converter.
REFERENCE SUB MODULE-BASED CAPACITOR MONITORING STRATEGY
FOR MODULAR MULTILEVEL CONVERTERS
Abstract:
The modular multilevel converter (MMC) is attractive for medium or high-power
applications because of the advantages of its high modularity, availability, and high power
quality. Reliability is one of the most important challenges for the MMC consisting of a
large number of submodules (SMs). The capacitor monitoring is one of the important issues
in the MMC. This paper proposed a reference submodule (RSM)-based capacitor
monitoring strategy for the capacitance estimation in the MMC, where the capacitances in
the monitoring SMs can be estimated based on the capacitor voltage relationship between
the RSM and the monitoring SMs. The proposed monitoring strategy does not rely on the
information of all capacitor voltage and current, which effectively simplifies the algorithm
for capacitance estimation. The simulation studies with the time-domain professional tool
PSCAD/EMTDC are conducted and a down-scale MMC prototype is also tested in the
laboratory with the proposed capacitor monitoring strategy. The study results confirm the
effectiveness of the proposed capacitor monitoring strategy.
NEW EMI MODEL WITH THE SAME INPUT IMPEDANCES AS CONVERTER
Abstract:
Among the already developed electromagnetic interference (EMI) models, there are the
three-terminal models based on the estimation of impedances. These models are very
interesting. Compared to the other models, they have the advantage of predicting conducted
interference generated by the filtered electronic devices. In this paper, in order to contribute
to this type of modeling, a new EMI model for power converters is proposed. This model
has the same input impedances as the converter, which allows predicting filtered and
unfiltered conducted interferences in a more accurate manner. It is based on estimating input
impedances of the actual converter, using a new method developed analytically. This
method requires only off-line measurements, making the model easy to identify and can be
applied even to high-power converters. Experimental illustrations are also included to verify
the validity of the proposed model. Comparison between measured and predicted results
with and without EMI filter shows that the model provides adequate prediction of the EMI
feature for power-switching converters.
TRANSFORMER-LESS BIDIRECTIONAL PWM CONVERTER INTEGRATING
VOLTAGE MULTIPLIER-BASED CELL VOLTAGE EQUALIZER FOR SERIES-
CONNECTED ELECTRIC DOUBLE-LAYER CAPACITORS.
Abstract:
In the traditional energy storage systems consisting of series connected energy storage cells
such as electric double-layer capacitors (EDLCs), not only a bidirectional PWM converter
but also a cell voltage equalizer is required. The system is prone to complexity as two

6. converters (i.e., the bidirectional converter and cell voltage equalizer) are separately
necessary. This paper proposes the transformer-less bidirectional PWM converter
integrating the voltage multiplier-based cell voltage equalizer. An inductor in a conventional
bidirectional PWM converter is replaced with series-connected inductors in the proposed
converter in order to generate square wave voltage with an arbitrary amplitude, by which
the voltage multiplier is driven. The charge-discharge cycling test for nice EDLCs
connected in series was performed using the proposed integrated converter from a voltage-
imbalanced condition. The voltage imbalance was gradually eliminated while charge-
discharge cycling, demonstrating the integrated functions.
ENERGY FEEDBACK CONTROL OF LIGHT-LOAD VOLTAGE REGULATION
FOR LLC RESONANT CONVERTER
Abstract:
LLC resonant converter would have light-load voltage regulation problems due to the effect
of parasitic capacitances in high frequency range. In this paper, an energy feedback control
method is proposed to improve the light-load regulation capacity by using synchronous
rectifiers (SRs). The SR bridges are controlled ahead of the primary inverter bridges to
deliver the energy from load to source, reducing the output voltage independent of the load.
Then the desired voltage can be achieved even in no load conditions by regulating the
operation time of the energy feedback mode. The gain, voltage ripple and efficiency
performances of the proposed control method are discussed based on the precise analysis
and accurate model of the converter. Moreover, the light-load operations of the LLC
resonant converter are analyzed deriving the critical load condition. Finally, the proposed
control method is verified by the experiments of a 12V/8A LLC resonant converter
prototype.
A NOVEL MULTILEVEL HIGH GAIN MODIFIED SEPIC DC-TO-DC
CONVERTER FOR HIGH VOLTAGE/LOW CURRENT RENEWABLE ENERGY
APPLICATIONS
Abstract:
In this paper a non isolated, non inverting, single switch, high gain modified SEPIC with
voltage multiplier dc-to-dc converter is proposed. The proposed circuit is a combination of
modified version of conventional SEPIC converter and voltage multiplier unit. The voltage
gain of proposed converter is increases to n time of (1/ (1-D) by extending the voltage
multiplier unit by n time. The advantage of proposed topology is reduced voltage stress
across switching device, which results into better efficiency and voltage gain is increased
without disturbing the main circuit. In this paper, the detail operation of proposed converter
with mathematical analysis is done. The proposed converter is simulated in MatLab R2016a
for three level with 120W power. The mathematical analysis and simulation results validates
the functionality of proposed converter.

7. PULSE SKIPPING MODULATION METHOD FOR MULTIPLE INPUT BUCK
BOOST CONVERTER.
Abstract:
Energy harvesting and wireless power transfer to power small, low-power and autonomous
devices have recently attracted numerous research studies. Due to the lack of energy
supplies, DC to DC converters with multiple inputs have been studied to harvest different
energy sources simultaneously. In this paper, a proposed pulse skipping modulation method
is used to control a multiple input buck boost converter with the output power from 7 μW-
700 μW. The DC to DC converter can achieve a high efficiency of 83.3% at 23.6 μA load
current, and the highest efficiency is up to 89.1% at 255 μA current load. The control
method offers the flexibility and adaptability in maximum power point tracking and input
power contribution. The paper investigates a completed energy harvesting system including
a solar cell and 915 MHz RF source and power management circuits.
USE OF MPPT TECHNIQUES TO REDUCE THE ENERGY PAY-BACK TIME IN
PV SYSTEMS.
Abstract:
Photovoltaic (PV) energy is a free energy used as an alternative to fossil fuel energy.
However, PV system without maximum power point tracking (MPPT) produces a low,
unstable power and with a long energy payback time (EPBT). This paper presents an
innovative artificial neuro-fuzzy inference system (ANFIS) MPPT technique that could
extract maximum power from a complete PV system and with a lessened energy payback
time (EPBT). To confirm the effectiveness of the ANFIS algorithm, its results was
compared with the results of PV system using Perturb&Observe (P&O) technique, non-
MPPT technique, combination of artificial neural network and support vector machine as
ANN-SVM technique and using Pretoria city weather data as case studies. Results show
that ANFIS-MPPT yielded the best result and with the lowest EPBT.
INTERLEAVED CUK CONVERTER WITH REDUCED SWITCH CURRENT
Abstract:
DC to DC converters are for generally used for intermediate power conversion processes in
switched mode power supplies, battery chargers, electric vehicles, solar and wind power
plants etc. The quality of current is a general issue when step-up converters are employed
for power conversions. Cuk converter with inductors on both input and output sides reduces
ripple on currents and improves the quality of source current. A Traditional Cuk Converter
(TCC) is simulated and validated experimentally. But sharing of currents in inductors
reduces ripples on source current further and also reduces peak current of the switch,
improve the quality of input power of converters. Hence an Interleaved Cuk Converter
(ICC) is proposed in this paper to share the source current in input inductors and to trim
down the switch peak current hence to shrink ripples on source current. A Phase Shifted
PWM (PSPWM) scheme is used in ICC and the switches are operated below 50% duty ratio
to cancel the ripples on source and output sides. From the simulation and experimental
results of TCC and ICC, it is observed that ICC reduces peak current of the switch, hence

8. device rating and also delivers output power with better efficiency & improved transient
performance. A modification on proposed ICC also provides boost operation with reduction
in peak current of the switch.
POWER MANAGEMENT OF A HYBRID WIND GAS ELECTROLYZE MICRO
GRID
Abstract:
The paper describes a power management strategy of a standalone hybrid wind small gas
turbine electrolyze power system to supply a remote village with electricity. The electrical
system consists of a variable speed wind turbine coupled to a permanent magnet
synchronous generator (PMSG) through a gear box, a diode bridge rectifier, a dc-to-dc
boost converter and a current controlled voltage source inverter. The wind energy system is
considered as the main power source. Output power from PMSG is first converted to DC,
`boosted', inverted then it is fed to the grid. The maximum power is always assured thanks
to the P&O MPPT algorithm. The electrolyze system is a backup source where the excess
of electrical power is stored. However, when wind speeds fall below the minimum required
a gas turbine system is activated to immediately produce the desired electricity. The
proposed power management algorithm of the whole hybrid system is simulated by using
MATLAB/SIMULINK® for various wind velocities. The simulation results obtained
showed that the load demand is satisfied although wind speeds fall below the minimum
required.
PARALLEL SOFT SWITCHING CONVERTER WITH FEWER SWITCH COUNTS
Abstract:
A parallel direct current (DC) to DC converter is presented for medium power applications.
The studied converter includes three half-bridge circuits with sharing two power switches at
high-voltage side to reduce switch counts. Three half-bridge circuits are connected by
primary-parallel and secondary-parallel to reduce the current stress of power devices at low-
voltage side. Each half-bridge circuit supplies one-third of the total power to the output
load. Asymmetric pulse-width modulation is employed to generate the gated signals of the
switches and regulate the output voltage. Based on the resonant behaviour of the output
capacitance of power switches and the leakage inductance of the transformer, the zero-
voltage switching turn-on of power switches can be achieved. Current doubler rectifier
topology is adopted at the low-voltage side to have the advantage of low ripple current at
output capacitor. A laboratory prototype with 1440 W power is built to verify theory
analysis and effectiveness of the studied converter.
ADAPTIVE AND ROBUST STABILIZATION OF FLYBACK POWER
CONVERTERS WITH DIGITAL CONTROL
Abstract:
DC to DC power converters are electrical system used to adapt an input voltage source to an
output load which may change with unknown variations but bounded. We propose an
observer-based control strategy with global asymptotic stability property that uses a

9. parameter estimate to compensate input sources and output load variations. The
demonstrator of this control strategy is done with a 30W Flyback Converter. This paper
shows a physical real time implementation of the control algorithm using C2000-familly
processor from Texas Instrument.
DESIGN OF A HIGH-EFFICIENCY WIRELESS POWER TRANSFER SYSTEM
WITH INTERMEDIATE COILS FOR THE ON-BOARD CHARGERS OF
ELECTRIC VEHICLES.
Abstract:
In this paper, a high efficiency inductive wireless power transfer system for the on-board
chargers of electric vehicles is proposed. In order to improve the power transfer efficiency,
the proposed system adopts two additional intermediate coils with resonant capacitors,
which increases the effective magnetizing impedance between the transmitter and receiver
coils with no ferrites. The resonant tank of the proposed system is designed to operate the
converter as a current source and as a voltage source at two different frequencies to
implement the constant current (CC) mode charge and constant voltage (CV) charge,
respectively. Since the proposed converter operates at a fixed frequency in each mode of
charge operation, full soft switching of all the switching devices is possible and the zero
phase angle condition can be achieved in both the CC and CV mode operations. A
theoretical analysis based on a Thevenin model to come up with a suitable design for the
battery charger and its closed-loop controller is presented and its superior performance is
demonstrated by experimental results. A 6.6 kW prototype is implemented with a 200 mm
air gap to demonstrate the validity of the proposed method. Experimental results show that
the dc to dc conversion efficiency of the proposed system is 97.08% at 3.7 kW of output
power in the CV mode charge.
DISTURBANCE OBSERVER BASED FUZZY SLIDING MODE CONTROL OF PV
GRID CONNECTED INVERTER
Abstract:
In this paper, a disturbance observer based fuzzy sliding mode control (DOBFSMC) strategy
is proposed for a single-phase PV grid-connected inverter. A disturbance observer is designed
to estimate the system uncertainties in real time and a sliding mode controller that is designed
with the output information of the disturbance observer is employed to control the output
voltage of the DC-AC inverter, a fuzzy system is used to approximate the upper bound of the
observation error between the actual disturbance and its observation value in order to
improve the performance of the control system. The inverter has strong robustness since the
disturbances can be adaptively compensated and the chattering is greatly reduced since the
switching gain can be very small for the upper bound of observation error is estimated by the
fuzzy system. Finally, simulation results verify the effectiveness of the proposed method.

10. IMPROVING THE PERFORMANCE OF GRID-CONNECTED VOLTAGE-
SOURCED INVERTERS UNDER UNBALANCED NETWORK CONDITIONS
USING A FUZZY SLIDING MODE- BASED APPROACH.
Abstract:
This paper proposes the application of fuzzy sliding mode controller for grid-connected
voltage-sourced inverters (VSIs) under unbalanced network conditions. To realize this
control scheme, sliding mode controller (SMC) is modified by adding fuzzy function to
determine reference components of the VSI voltage in the stationary reference frame.
Integration of fuzzy function into SMC achieves several advantages including suppression of
chattering phenomenon, high tracking precision, and desirable robustness to uncertainties.
Moreover, this control strategy requires neither phase locked loop function (PLL) nor
synchronous coordinate transformation, which results in simple implementation. Simulation
results for two cases of unbalanced grid voltages including non-identical amplitudes and
unbalanced phase angles for three phase voltages are presented. The VSI is first controlled by
modified SMC with power compensation feedbacks and then by fuzzy SMC. The results
confirm that in comparison with modified SMC with power compensation feedbacks,
employing fuzzy SMC not only leads to remarkable reduction of active and reactive power
pulsations, but also decreases total harmonic distortion of the grid currents.
ON-LINE FAILURE DIAGNOSIS OF GRID-CONNECTED PHOTOVOLTAIC
SYSTEMS BASED ON FUZZY LOGIC.
Abstract:
Accurate identification of failures in photovoltaic (PV) systems, which can result in energy
loss or even serious safety issues, is crucial for ensuring reliability of the installations and the
guaranteed lifetime output. The scope of this paper is to present the development of failure
detection routines (FDRs) that operate on acquired data-sets of grid-connected PV systems in
order to diagnose the occurrence of failures. The developed FDRs comprise of a failure
detection and classification stage. Specifically, the failure detection stage was based on a
comparative statistical approach between the measured and simulated electrical
measurements. In parallel, fuzzy logic inference was performed in order to analyse the failure
pattern and classify accurately the occurred fault. The fuzzy rule based classification system
(FRBCS) models were constructed for each failure through a supervisory learning process,
trained with continuous samples split in a 70:30 % train and test set approach of acquired
data-sets which included the feature patterns exhibited during normal and faulty operation.
The results obtained by emulating three failure patterns (partial shading, inverter shutdown
and bypass diode failure), showed that the developed FDRs were capable of detecting
accurately the faults upon their occurrence by signifying detectable discrepancies through the
daily statistical comparisons of the measured and simulated electrical parameters. Finally, the
developed classification models showed high accuracy of classifying each failure occurrence
within the test set used for benchmarking. Specifically, the success rate obtained with the
FRBCS models was 100 %, 96.9 % and 96.53 %, when classifying the inverter shutdown
failure, bypass diode fault and partial shading, respectively.

11. FUZZY PREDICTIVE DTC OF INDUCTION MACHINES WITH REDUCED
TORQUE RIPPLE AND HIGH PERFORMANCE OPERATION
Abstract:
This paper proposes an enhanced strategy for direct torque control (DTC) combining artificial
intelligent (AI) and predictive algorithms. The advantages of this merge are in the solution of
closed-loop controlled induction machine (IM) problems. Predictive DTC (P-DTC) methods
reduce the high torque ripple and improve the performance at both starting condition and low
mechanical speed operation. However, P-DTC depends on the IM parameter's knowledge.
The approach here is the introduction of fuzzy logic control with dynamic rules based on the
P-DTC law's to reduce the parameter dependency and improve the performance of P-DPC.
Additional comparative performance study of eight modulation strategies under the proposed
fuzzy-predictive DTC (FP-DTC) is conducted. It results that the space-vector modulation
(SVM) is the most suitable scheme with the best combination of criteria such stator current
total harmonic distortion, switching losses and dynamic behavior. The parameter dependency
of the FP-DTC is tested by a sensitivity analysis which corroborates the robustness of the
proposed control. For verification purposes, simulations of the DTC, P-DTC, and FP-DTC
were conducted and compared. Experimental results for the three controllers and two
modulations (pulse width modulation and SVM) confirm the expected performance of the
proposed control algorithm and modulation assessment study.
FAMILY OF MULTIPORT SWITCHED-CAPACITOR MULTILEVEL INVERTERS
FOR HIGH FREQUENCY AC POWER DISTRIBUTION
Abstract:
This paper proposes a family of multiport switched-capacitor multilevel inverter (SCMLI)
topologies for high frequency AC power distribution. It employs asymmetric DC voltage
sources with a common ground which makes it ideal to be employed in renewable energy
farms and modern electric vehicles. The proposed family of step-up SCMLI attains higher
number of output voltage steps with optimum component count in comparison to several
existing topologies. The problem of capacitor voltage balancing is solved as the capacitors
are inherently charged to a finite voltage every half cycle. In-depth study on two staircase
modulation strategies, namely selective harmonic elimination and minimum total harmonic
distortion scheme is presented with study on the variation of switching angles and THD
with modulation indices under both schemes. Working principle and analysis are presented
for the proposed family of topologies. Simulation outcomes are validated with experimental
results for various staircase modulation schemes with equal and unequal output voltage
waveform steps.
A NEW APPROACH TO FAULT DIAGNOSIS OF MULTILEVEL INVERTER
Abstract:
To handle the fault diagnosis of multilevel inverter, a new approach based on hybrid
intelligent algorithms has been proposed in this paper. Firstly, the wavelet packet transform
(WPT) is applied for the multi-scale wavelet packet decomposition of the fault signal, and
the fault feature vector is extracted from the reconstructed wavelet packet energy. Then, the
principal component analysis (PCA) is employed to extract the principal information with
lower dimension. Finally, the BP neural network (NN) is used for the fault diagnosis and

12. identification. The simulation results show that the proposed method is more accurate for
the fault diagnosis of multilevel inverter than traditional methods and more robust to the
noise of fault signals.
PV-FC HYBRID SYSTEM WITH MULTILEVEL BOOST CONVERTER FED
MULTILEVEL INVERTER WITH ENHANCED PERFORMANCE
Abstract:
This paper presents a multilevel boost converter fed multilevel inverter for hybrid solar PV-
FC systems. Previously conventional boost converters were used to step up the voltage
obtained from sources. But recently these are replaced by different high step-up Boost
Converters which can produce much higher output voltage than that of conventional boost
converters (BC). But all these high step-up boost converters are meant for only particular
output voltage. But in this present system a multilevel boost Converter (MLBC) is used
which can step-up to any voltage just by adding capacitors and diodes. The power source
consists of photo voltaic generator and PEM Fuel cell. Modified P&O MPPT algorithm is
used to extract the maximum power from PV system. Both boost converters fed multilevel
inverter and multi level boost converter fed multi level inverter systems are modeled,
simulated and their results are compared. Simulation results indicate that MLBC system
produces higher output power than normal BC system based MLI for the same input voltage
from PV & FC sources and load resistance.
MODELING AND ANALYSIS OF 21 LEVEL CASCADE MODEL MULTILEVEL
INVERTER
Abstract:
A new cascade model multilevel inverter for generating 21 voltage levels has been proposed
in this paper. Results obtained from this model and conventional cascaded H-bridge (CHB)
inverter are compared. To generate 21 - level output voltage by using CHB ten H-bridge
modules are required and each module consists of four numbers of switching devices.
Whereas the proposed cascade model has sub-multilevel inverter blocks, are connected in
series. This topology results in reduction of installation area, cost and simple control system.
The performance of both topologies was observed by MATLAB/SIMULINK.
DIGITAL IMPLEMENTATION OF SHE-PWM MODULATION ON FPGA FOR A
MULTILEVEL INVERTER
Abstract:
This paper presents a digital implementation of the Selective Harmonic Elimination Pulse-
Width Modulation Technique (SHE-PWM) using a FPGA (Field Programmable Gate Array)
with its logical structure developed through the VHDL language. A theoretical study of
harmonics elimination strategy is detailed and as experimental results are shown the gate
signals provided by the FPGA, which validate the digital development of the technique

13. together with simulation of that strategy. The technique is applied to a five level hybrid
multilevel inverter based on the Half-Bridge and ANPC topologies.
GENERALIZED ADAPTIVE PHASE-SHIFTED PWM FOR SINGLE-PHASE
SEVEN-LEVEL CASCADED H-BRIDGE MULTILEVEL INVERTERS
Abstract:
Cascaded H-bridge multilevel inverters have gained a significant popularity in medium to
high power motor drive applications and grid-connected renewable energy systems in recent
years. Under equal DC voltages, cascaded H-bridge multilevel inverters use phase-shifted
pulse width modulation (PS-PWM) technique to generate the output voltage. However,
under unequal DC voltages which may happen because of the renewable energy sources
connected to front-end of the multilevel inverter, traditional PS-PWM method fails to
achieve good output harmonics. In this paper, a frequency domain analysis of PS-PWM is
presented. By using the analysis, a phase angle modification of traditional PS-PWM is
introduced. The proposed method helps eliminate first order harmonics of triangular carrier
frequency and its sidebands under randomly selected DC voltages and DC voltage fault
conditions. Finally, simulation results for single phase seven- level cascaded H-bridge
multilevel inverter are presented to validate the good performance of the proposed method.
D-STATCOM: A STUDY ON THE NPC MULTILEVEL INVERTER AND
CONTROL STRATEGIES
Abstract:
This paper confers the relativistic study and analysis on the characteristic of neutral point
clamped multilevel inverter (NPCMLI) (three to eleven level) with fixed DC link voltage
and with distinct pulse width modulation (PWM) competence, as a Distribution Static
Compensator (D-STATCOM) which counterbalances the current harmonics, unbalanced
load and reactive power in a typical three-phase three wire medium voltage distribution
power system. The agility of the D-STATCOM depends upon the control strategy. The
conventional control strategies like synchronous detection method (SDM), synchronous
reference frame theory (SRFT) and instantaneous pq theory (IPQT) were availed to gauge
the compensating currents for imparting optimum results in repressing harmonics
originated from non-linear loads. The MATLAB simulation results were leveraged for
comparative analysis and performance evaluation of NPCMLI at different levels with
various control strategies.
HARDWARE DESIGN OF THREE PHASE VOLTAGE SOURCE INVERTER
USING ARDUINO MICROCONTROLLER AND ITS HARMONIC ANALYSIS
Abstract:
This paper work aims at design and implementation of a three-phase Voltage Source
Inverter. DC to AC Converter are widely used in the area of renewable energy and in
Industrial Drives. Generally, Inverters are used in high power applications for driving
Industrial based Motors. Speed Control of Induction Motor is widely done through three-
phase Inverter and Inverter convert the DC input from the solar panel to the mains. Hence
designing the cost-effective inverter with less harmonics has always been a challenge in the

14. area of Power Converter. This paper explores the design methodology and focuses on
designing a simple and cost-effective control circuit for a three-phase Voltage Source
Inverter. The switching logic is implemented in a microcontroller (Arduino) and the driver
circuit is designed using TLP350 (optocoupler). MATLAB/Simulink and Hardware Design
of Three-phase Voltage Source Inverter for 120° mode has been done and it is use to drive
1H.P Three-phase Induction Motor. Designed Inverter was studied and its Harmonic
Analysis was done and compare using power analyzer. Both the Hardware and Simulation
of three-phase VSI has been explained, compared and is verified.
A UNIDIRECTIONAL SINGLE-STAGE THREE-PHASE SOFT-SWITCHED
ISOLATED DC-AC CONVERTER
Abstract:
This paper presents a novel single-stage soft-switched high frequency link three-phase DC-
AC converter topology. The topology supports unidirectional DC to AC power flow and is
targeted for applications like grid integration of photovoltaic sources, fuel cell etc. The high
frequency magnetic isolation results in reduction of system volume, weight and cost. Sine-
wave pulse width modulation is implemented in DC side converter. Though high frequency
switched, DC side converter is soft-switched for most part of the line cycle. The AC side
converter active switches are line frequency switched incurring negligible switching loss.
The line frequency switching of AC side converter facilitates use of high voltage blocking
inherently slow semiconductor devices to generate high voltage AC output. In addition, a
cascaded multilevel structure is presented in this paper for direct medium voltage AC grid
integration. A detailed circuit analysis considering non-idealities like transformer leakage
and switch capacitances, is presented in this paper. A 6kW three phase laboratory prototype
is build. The presented simulation and experimental results verify the operation of proposed
topologies.
EFFICIENCY ENHANCED LINEAR DC-DC CONVERTER TOPOLOGY WITH
INTEGRATED DC-UPS CAPABILITY
Abstract:
Uninterruptible power supply (UPS) systems are used to buffer against input energy source
disconnections. In most UPS systems associated with an AC input energy source, an AC-
DC converter feeds an energy storage system such as a battery bank or a supercapacitor
bank together with a DC to AC conversion systems to buffer against AC input supply
failures. If the critical load is fed by a DC source, DC-UPS designs are introduced with
high efficiency, less complexity, low cost and smaller size. Supercapacitor assisted low
dropout (SCALDO) regulator is a novel DC-DC converter developed to achieve high
efficiency in a linear regulator approach using a supercapacitor as a series dropper element
in the series path of a linear regulator such as a LDO. The DC-UPS capability is a novel
feature which can be integrated into the SCALDO regulator simply by oversizing the
supercapacitor without using any additional hardware. This paper describes the conceptual
background followed by experimental results of the DC UPS capability integrated
SCALDO regulator using 12-5 V prototype.

15. MODIFIED (2/1-K) OUTPUT GAIN ĆUK DC-TO-DC CONVERTER CIRCUIT FOR
RENEWABLE POWER APPLICATIONS
Abstract:
Renewable energy applications have become a focal point of most researches in recent years
to achieve an eco-friendly atmosphere and mitigate the dangers posed by global warming
and climate changes. A modified high gain DC-to-DC Ćuk converter using voltage lift
technique is presented in this paper. The converter generates an amplified version of the
input voltage through the inclusion of a switched capacitor topology. In perspective view,
the resultant modified Ćuk circuit generates a voltage conversion ratio of twenty at duty
ratio of 0.9 by using 3 inductors, 5 capacitors and 4 diodes. A detailed analytical analysis is
validated by simulations conducted in Matlab/Simulink.
METRO TRAIN LINE VOLTAGE CONTROL: USING AVERAGE MODELING
BIDIRECTIONAL DC-DC CONVERTER.
Abstract:
The new approach to energy management issues makes Energy Storage Systems an
interesting subject for both researchers and industries. One of the most important consumers
of electric energy in urban areas is electric railways (metro trains). Thanks to regenerative
braking, there is possibility of reusing braking energy by storing and using it again in
acceleration period. Designing, sizing, and controlling such system is still an open
discussion. In this paper a new control strategy is proposed based on average modeling of
the converter between energy storage and dc grid. The simulation in MATLAB-Simulink is
presented, all overhead and metro train data are from Mashhad metro line, and as a result of
the proposed control strategy, voltage regulation, energy saving and peak power shaving is
obtained.
IMPLEMENTATION OF RECURRENT NEUROCONTROL ALGORITHM FOR
TWO STAGES SOLAR ENERGY CONVERSION SYSTEM.
Abstract:
A grid interactive photovoltaic generation system is developed in this work. A boost
converter forms the initial stage and is used to obtain the maximum power from the PV array.
It is controlled using an incremental conductance (INC) based algorithm. The second stage is
a voltage source converter (VSC), which interfaces the PV system to the grid. A recurrent
neurocontrol based algorithm is used to generate the switching pulses for the VSC. The solar
energy conversion system (SECS) has the capabilities of harmonics reduction, reactive power
compensation, unity power factor operation and grid currents balancing. The proposed
system is validated under various operating conditions using simulation as well as
experimental results
SPEED CONTROL OF SOLAR WATER PUMPING WITH INDIRECT VECTOR
CONTROL TECHNIQUE.
Abstract:

16. This paper deals with a solar based indirect vector controlled induction motor drive(IMD) for
water pumping system. The speed of IMD is estimated by taking stator current and rotor flux
as a state variable. It consists of a solar photovoltaic (PV) array, boost converter, voltage
source inverter (VSI) and a motor-pump assembly. In spite of atmospheric variation,
maximum power point tracker (MPPT) based upon an incremental and conductance (I&C)
algorithm tracks maximum power from solar PV array. The proposed system is designed and
simulated in MATLAB/Simulink platform and speed control of IMD is demonstrated through
simulated results.
NEUTRAL POINT CLAMPED MOSFET INVERTER WITH FULL-BRIDGE
CONFIGURATION FOR NON-ISOLATED GRID-TIED PHOTOVOLTAIC
SYSTEM.
Abstract:
Existing nonisolated full-bridge neutral point clamped (NPC) inverters for a single-phase
grid-tied photovoltaic (PV) system have limitations such as shoot-through and low European
Union (EU) efficiency. In order to address these limitations, an NPC superjunction MOSFET
nonisolated inverter with full-bridge configuration (NIIFBC) is proposed in this paper. This
inverter reduces the possibility of shoot-through, thereby improving the reliability of the grid-
tied PV system. It controls the grid current by energizing two coupled inductors individually
during positive and negative half-grid cycles. This obviates the possibility of reverse recovery
loss in switches due to their body diodes. Furthermore, two external silicon carbide diodes of
a clamping branch cause negligible reverse recovery loss in switches besides a constant
common-mode voltage. Therefore, the main claims of NIIFBC are low leakage current, high
EU efficiency, and reliability. A generalized leakage current model for the proposed inverter
is developed. In order to validate the veracity of the model and the claims of NIIFBC, a 1-kW
prototype is designed and developed. The experimental results of NIIFBC validate the claims
made by the authors. Its performance comparison with the existing nonisolated full-bridge
inverters is given. Furthermore, a variant circuit of NIIFBC operating at nonunity power
factor is proposed
A PERFORMANCE INVESTIGATION OF A FOUR-SWITCH THREE-PHASE
INVERTER-FED IM DRIVES AT LOW SPEEDS USING FUZZY LOGIC AND PI
CONTROLLERS.
Abstract:
This paper presents a speed controller using a fuzzy-logic controller (FLC) for indirect field-
oriented control (IFOC) of induction motor (IM) drives fed by a four-switch three-phase
(FSTP) inverter. In the proposed approach, the IM drive system is fed by an FSTP inverter
instead of the traditional six-switch three-phase (SSTP) inverter for cost-effective low-power
applications. The proposed FLC improves dynamic responses, and it is also designed with
reduced computation burden. The complete IFOC scheme incorporating the FLC for IM
drives fed by the proposed FSTP inverter is built in MATLAB/Simulink, and it is also
experimentally implemented in real time using a DSP-DS1103 control board for a prototype
1.1-kW IM. The dynamic performance, robustness, and insensitivity of the proposed FLC
with the FSTP inverter-fed IM drive is examined and compared to a traditional proportional-

17. integral (PI) controller under speed tracking, load disturbances, and parameters variation,
particularly at low speeds. It is found that the proposed FLC is more robust than the PI
controller under load disturbances, and parameters variation. Moreover, the proposed FSTP
IM drive is comparable with a traditional SSTP IM drive, considering its good dynamic
performance, cost reduction, and low total harmonic distortion (THD).
A THREE-LEVEL, T-TYPE, POWER ELECTRONICS BUILDING BLOCK USING
SI-SIC HYBRID SWITCH FOR HIGH-SPEED DRIVES
Abstract:
This paper presents the design and implementation of a 100 kW three-level T-type (3L-T 2
),
single-phase power electronics building block (PEBB). The PEBB features switching power
devices with associated gate drivers, DC-link capacitors and interconnection busbar. A hybrid
switch (HyS), which includes a Si IGBT and a SiC MOSFET in parallel, forms the switching
power device in the PEBB. An low-inductive multi-layer laminated busbar was designed to
have symmetrical current commutation loops. A major contribution is that this is achieved
while no three-level T-type power module was used. A loop inductance of 29 nH was
achieved which is lower than the existing state-of-the-art three-level designs in literature. The
fabricated prototype PEBB achieves a specific power density of 27.7 kW/kg and a volumetric
power density of 308.61 W/in 3
. Single-phase operation of the PEBB has been demonstrated
at the switching frequency of 28 kHz.
ASSET MANAGEMENT STRATEGIES FOR POWER ELECTRONIC
CONVERTERS IN TRANSMISSION NETWORKS: APPLICATION TO HVDC AND
FACTS DEVICES
Abstract:
The urgency for an increased capacity boost bounded by enhanced reliability and
sustainability through operating cost reduction has become the major objective of electric
utilities worldwide. Power electronics have contributed to this goal for decades by providing
additional flexibility and controllability to the power systems. Among power electronic based
assets, high-voltage dc (HVdc) transmission systems and flexible ac transmission systems
(FACTS) controllers have played a substantial role on sustainable grid infrastructure. Recent
advancements in power semiconductor devices, in particular in voltage source converter
based technology, have facilitated the widespread application of HVdc systems and FACTS
devices in transmission networks. Converters with larger power ratings and higher number of
switches have been increasingly deployed for bulk power transfer and large scale renewable
integration-increasing the need of managing power converter assets optimally and in an
efficient way. To this end, this paper reviews the state-of-the-art of asset management
strategies in the power industry and indicates the research challenges associated with the
management of high power converter assets. Emphasis is made on the following aspects:
condition monitoring, maintenance policies, and ageing and failure mechanisms. Within this
context, the use of a physics-of-failure based assessment for the life-cycle management of
power converter assets is introduced and discussed.

18. DESIGN AND IMPLEMENTATION OF POWER ELECTRONIC CONVERTERS IN
WIND TURBINE SYSTEM
Abstract:
Wind power generation is experiencing a tremendous growth over the past few decades in
terms of the individual turbine size as well as the total installed capacity. Power electronics
has played a significant role in bringing about this change as they are a technical solution to
wind turbine's electrical difficulties. This paper analyses the need for power electronic
converters in wind turbine systems. Nowadays, the proportion of power integrated into the
grid is accelerating at a very fast pace. A grid fault might lead to a decline in the voltage (dip)
resulting in an extensive tripping of the wind turbines leading to voltage instabilities and
blackouts. To ensure continuous operation, low voltage ride through (LVRT) requirements of
the wind turbines must be met. LVRT is achieved by using energy storage devices. High
voltage ride through prevents the occurrence of overvoltage conditions across the network by
using a crowbar circuit arrangement across the DC link. In this paper, a 2MW wind turbine
system (WTS) employing a permanent magnet synchronous generator (PMSG) connected to
the network through a back-to-back power converter is simulated in MATLAB/Simulink.
From the results, it can be observed that to meet the interconnection requirements of the grid
such as voltage, frequency, power, harmonics, etc. with the wind turbine characteristics, it is
essential to employ power converters. Control system on generator side converter is designed
to control the speed of the PMSG to ensure Maximum Power Point Tracking (MPPT) while
the grid side converter control system controls the DC link bus voltage and the sinusoidal
nature of the voltage and current given to the grid.
A HYBRID UP-PWM SCHEME FOR HERIC INVERTER TO IMPROVE POWER
QUALITY AND EFFICIENCY
Abstract:
The Highly Efficient and Reliable Inverter Concept (HERIC) inverter is a cost-effective
topology, which has low leakage currents and a relatively high efficiency. Thus, it is very
suitable for transformerless PV system. However, with the reported modulation methods, it is
difficult to simultaneously maintain high efficiency, good power quality, and reactive power
injection of HERIC inverter. In this paper, a hybrid unipolar pulse width modulation (UP-
PWM) scheme is thus proposed to achieve those performances. The hybrid scheme adopts the
conventional UP-PWM in the case of generating the positive power. When generating the
negative power, a modulation scheme, which only requires the operation of freewheeling
switches, is specifically proposed. Additionally, in the region of the output voltage and
current zero-crossing points (ZCP), an UP-PWM with modified dead time is introduced. In
order to validate the effectiveness of the proposed scheme, simulations and experiments are
performed on a 4-kW HERIC prototype with a 20-kHz switching frequency. The results
demonstrate that the proposed hybrid UP-PWM method achieves a better performance in
terms of reactive power injection than the conventional UP-PWM scheme, and a higher
efficiency than the UP-PWM with dead time. In addition, the proposed UP-PWM scheme
also enables a better power quality.

19. APPLICATION STUDY ON INDUCTION HEATING USING HALF BRIDGE LLC
RESONANT INVERTER.
Abstract:
Nowadays, an induction heating has been a popular heating technique and used in various
applications such as melting, heat treating, preheating for welding, brazing, soldering, curing,
sealing and shrink fitting. It is the fast, efficient, precise, repeatable and non-contact
technique for heating metals or other electrically-conductive materials. This paper aims to
present the induction heating to half bridge LLC resonant inverter application. The analysis
contains six components: transformer, full bridge rectifier, half bridge inverter, resonant tank,
high frequency transformer, and coil. Furthermore, a PLL controller is used in the system.
Basically, an induction power is supplied to the induction heating system in which an
alternating current of a converter is delivered to a work piece. The convertor is LLC that is
used in this analysis for improving its resonant. The work piece is 20-cm length and 9-mm
diameter with 5-turn coil. In addition, it is heated for 60 seconds with temperature at 352
degree Celsius.
SOLAR PV BASED RESONANT INVERTER FOR INDUCTION COOKER.
Abstract:
This paper presents the investigation and analysis of induction cooker, using half bridge
series resonant inverter connected in series with Thyristor controlled reactor(TCR). The
supply to this inverter is given through the solar PV panel. Maximum power point tracking
(MPPT) is applied for tracking the maximum solar energy. It is applied to the domestic
induction heating operation which supplies medium frequency currents (20-100 kHz) to the
inductor, which heats up the plate. The simulation of this topology is carried out in the
MATLAB/SIMULINK platform.
OPERATION OF A BIDIRECTIONAL SERIES RESONANT CONVERTER WITH
MINIMIZED TANK CURRENT AND WIDE ZVS RANGE.
Abstract:
Since that high-frequency isolated resonant converters are featured with low switching
losses due to wide soft-switching operation range, to minimize the resonant tank current is
able to enhance the overall system efficiency and reduce the component stresses as well. In
this work, a bidirectional series resonant converter under phase-shifted modulation
combined with a modified pulse-width modulation gating scheme is addressed. The
modified pulse-width modulation gating scheme is helpful to keep more switches operating
in zero-voltage switching at light load. According to the steady-state analysis with
fundamental-harmonic approximation approach, a specified control strategy with minimum
rms tank current based on three control dimensions is proposed in closed form. The validity
of the proposed control strategy is verified through experimental tests. Compared with
existing control strategies for minimum current operation, the proposed control strategy

20. demonstrates comparable performance in depressing conduction loss and wider soft-
switching range as well so that it is able to achieve high efficiency especially at light load.
DETECTING FAULTY SOLAR PANELS BASED ON THERMAL IMAGE
PROCESSING
Abstract:
Recently, the solar power generation has attracted much attention and market is growing.
Although it is more common than in the past, there is not enough specialist for maintenance
of the solar panel. Because solar panels are exposed to the outdoor environment, frequent
failures can occur. So, we propose a solar panel detection system using the drones, the
thermal cameras, and the RGB cameras. We used the characteristics of the fault of solar
panel in the thermal camera, and detected the position of the photovoltaic panel and the
array using the RGB camera.