The document discusses voltage droop control in microgrids with distributed generators. It proposes a droop control scheme that uses local power measurements to adjust generator operating points for load sharing. The scheme calculates a reference voltage based on real power output and compares it to actual voltage to create an error signal. This signal is used to control inverters through PWM signals. The proposed system studies two distributed generation subsystems each with two inverters and loads. An integral control term is also used to regulate voltage and maintain reactive power sharing during real power disturbances. This configuration aims to improve power quality by reducing harmonic distortion.
The energy sector is moving into the era of distributed generation (DG) and microgrids
(MGs). The stability and operation aspects of converter-dominated DG MGs, however, are faced by
many challenges. To overcome these difficulties, this paper presents a new large-signal-based control
topology for DG power converters that is suitable for both grid connected and islanding modes of
operation without any need to reconfigure the control system and without islanding detection. To
improve MG stability and to guarantee stability and high performance of the MG system during sudden
harsh transients such as islanding, grid reconnection, and large load power changes, a nonlinear MG
stabilizer is proposed. We propose a novel control topology for microgrids which can work in both grid
connected and islanding modes without reconfiguration so it does not require islanding detection
technique, the controller is based on the concept of synchronverter In this paper, a radical step is taken
to improve the synchronverter as a self-synchronized synchronverter by removing the dedicated
synchronization unit
The energy sector is moving into the era of distributed generation (DG) and microgrids
(MGs). The stability and operation aspects of converter-dominated DG MGs, however, are faced by
many challenges. To overcome these difficulties, this paper presents a new large-signal-based control
topology for DG power converters that is suitable for both grid connected and islanding modes of
operation without any need to reconfigure the control system and without islanding detection. To
improve MG stability and to guarantee stability and high performance of the MG system during sudden
harsh transients such as islanding, grid reconnection, and large load power changes, a nonlinear MG
stabilizer is proposed. We propose a novel control topology for microgrids which can work in both grid
connected and islanding modes without reconfiguration so it does not require islanding detection
technique, the controller is based on the concept of synchronverter In this paper, a radical step is taken
to improve the synchronverter as a self-synchronized synchronverter by removing the dedicated
synchronization unit
Intelligent Microgrid and Distributed Generations pptMayur Hiwale
ppt is about microgrid and its evolution to intelligent microgrid. In this ppt you get know about the microgrid its architecture, advantages, disadvantages and application and implemention and also the comparison between old microgrid and new intelligent microgrid.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
HYBRID Microgrid Integration Using Fuzzy Logic Controller Mujtaba Farrukh
A microgrid is a small-scale power supply network that is designed to provide power for a small community. It enables local power generation for local loads. It comprises of various small power-generating sources that makes it highly flexible and efficient.
Review of Microgrid Technology and its Control Strategy is explained in this slide. This Slides along with the reference mentioned will help you to understand more better on Operation of microgrid ,Difference between Ac microgrid and DC microgrid ? How Real and Reactive can be transferred to the grid? Why dq axis current are considered?.
Please feel free to contact me for the detailed report.
Study and realization of dc micro-grid for remote areas.Umair Hashmi
DC Micro-grid is a small scale power supply network that is designed to provide power for small community.
It enables local power generation for local loads.
It is connected to both the local generating units and the utility grid thus preventing power outages
The hybrid AC/DC microgrid is considered to be the more and more popular in power systems as increasing DC loads. In this study, it is presented that a hybrid AC/DC microgrid is modelled with some renewable energy sources (e.g. solar energy, wind energy), typical storage facilities (e.g. batteries), and AC, DC load, and also the power could be transformed smoothly between the AC and DC sub-grids by the bidirectional AC/DC converter. Meanwhile, coordination control strategies are proposed for power balance under various operations. In grid-connected mode, the U–Q (DC bus voltage and reactive) or PQ method is adopted for the bidirectional AC/DC converter according to the amount of exchange power between AC and DC system in order to improve the DG utilisation efficiency, protecting the converter and maintain the stable operation of the system. In islanded mode, V/F control is applied to stabilising the entire system voltage and frequency, achieving the power balance between the AC and DC systems. Finally, these control strategies are verified by simulation with the results showing that the control scheme would maintain stable operation of the hybrid AC/DC microgrid.
This slide presents an introduction to microgrid. This is the second class for the subject 'Distribution Generation and Smart Grid'. Class wise I will provide all the discussions and analysis.
In these slides we discuss that how to trade a energy which is generated from renewable resources and how to manage that energy
Regards: Dr Muhammad Naeem
Assistant Professor CIIT WAH Cantt
New York’s Reforming the Energy Vision (REV) initiative seeks to fundamentally transform the way electricity is distributed, generated and used across the State. Utilities are being challenged to adapt their business models and distribution infrastructure to meet these new goals. REV also presents an opportunity for utilities to provide their customers with a broader range of services that lead to a more diverse, innovative and resilient energy infrastructure.
A key focus of REV is the transition to local distributed energy platforms including microgrids, which can be operated in conjunction with the grid or independently in emergencies. TRC recentlypresented an educational webinar to help New York’s utilities and other decision makers take action to plan and implement successful microgrids. This presentation covers:
• Basic concepts for developing a microgrid
• Differences from operating within the conventional grid
• Preliminary engineering steps required
• Options for generation sources
The webinar recording is available at http://blog.trcsolutions.com/wp-content/uploads/2015-01-22-10.02-Planning-a-Successful-Microgrid.mp4
Hybrid Micro Grid Solutions are those that allow quick deployment in remote areas. This solution mixes both conventional and non conventional generation technology for rapid deployment. The projects combines modular containerized turbine system, industrial inverters and distribution infrastructure.
Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...Pradeep Avanigadda
Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters.
This project presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems.
The inverter can thus be utilized as:
1) power converter to inject power generated from RES to the grid &
2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current.
Intelligent Microgrid and Distributed Generations pptMayur Hiwale
ppt is about microgrid and its evolution to intelligent microgrid. In this ppt you get know about the microgrid its architecture, advantages, disadvantages and application and implemention and also the comparison between old microgrid and new intelligent microgrid.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
HYBRID Microgrid Integration Using Fuzzy Logic Controller Mujtaba Farrukh
A microgrid is a small-scale power supply network that is designed to provide power for a small community. It enables local power generation for local loads. It comprises of various small power-generating sources that makes it highly flexible and efficient.
Review of Microgrid Technology and its Control Strategy is explained in this slide. This Slides along with the reference mentioned will help you to understand more better on Operation of microgrid ,Difference between Ac microgrid and DC microgrid ? How Real and Reactive can be transferred to the grid? Why dq axis current are considered?.
Please feel free to contact me for the detailed report.
Study and realization of dc micro-grid for remote areas.Umair Hashmi
DC Micro-grid is a small scale power supply network that is designed to provide power for small community.
It enables local power generation for local loads.
It is connected to both the local generating units and the utility grid thus preventing power outages
The hybrid AC/DC microgrid is considered to be the more and more popular in power systems as increasing DC loads. In this study, it is presented that a hybrid AC/DC microgrid is modelled with some renewable energy sources (e.g. solar energy, wind energy), typical storage facilities (e.g. batteries), and AC, DC load, and also the power could be transformed smoothly between the AC and DC sub-grids by the bidirectional AC/DC converter. Meanwhile, coordination control strategies are proposed for power balance under various operations. In grid-connected mode, the U–Q (DC bus voltage and reactive) or PQ method is adopted for the bidirectional AC/DC converter according to the amount of exchange power between AC and DC system in order to improve the DG utilisation efficiency, protecting the converter and maintain the stable operation of the system. In islanded mode, V/F control is applied to stabilising the entire system voltage and frequency, achieving the power balance between the AC and DC systems. Finally, these control strategies are verified by simulation with the results showing that the control scheme would maintain stable operation of the hybrid AC/DC microgrid.
This slide presents an introduction to microgrid. This is the second class for the subject 'Distribution Generation and Smart Grid'. Class wise I will provide all the discussions and analysis.
In these slides we discuss that how to trade a energy which is generated from renewable resources and how to manage that energy
Regards: Dr Muhammad Naeem
Assistant Professor CIIT WAH Cantt
New York’s Reforming the Energy Vision (REV) initiative seeks to fundamentally transform the way electricity is distributed, generated and used across the State. Utilities are being challenged to adapt their business models and distribution infrastructure to meet these new goals. REV also presents an opportunity for utilities to provide their customers with a broader range of services that lead to a more diverse, innovative and resilient energy infrastructure.
A key focus of REV is the transition to local distributed energy platforms including microgrids, which can be operated in conjunction with the grid or independently in emergencies. TRC recentlypresented an educational webinar to help New York’s utilities and other decision makers take action to plan and implement successful microgrids. This presentation covers:
• Basic concepts for developing a microgrid
• Differences from operating within the conventional grid
• Preliminary engineering steps required
• Options for generation sources
The webinar recording is available at http://blog.trcsolutions.com/wp-content/uploads/2015-01-22-10.02-Planning-a-Successful-Microgrid.mp4
Hybrid Micro Grid Solutions are those that allow quick deployment in remote areas. This solution mixes both conventional and non conventional generation technology for rapid deployment. The projects combines modular containerized turbine system, industrial inverters and distribution infrastructure.
Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...Pradeep Avanigadda
Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters.
This project presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems.
The inverter can thus be utilized as:
1) power converter to inject power generated from RES to the grid &
2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current.
Renewable Energy Sources are being used in Off-Grid mode. By integrating all these sources to a common point energy efficiency can be improved and frequent dynamic faults can be avoided. This approach needs to implement smart grid and technologies.
Voltage Support and Reactive Power Control in Micro-grid using DGIJMER
Distribution Generators(DGs) are the renewable energy resource which can be connected to
the grid. When it is connected to the grid it should be operated with controlled voltage and reactive
power control. And in autonomous mode(i.e disconnected mode) it should operate in backup generation
mode. These DGs are connected towards the micro grid operation. The proposed control system
facilitates flexible and robust DG operational characteristics such as active/reactive power (PQ) or
active power/voltage (PV) bus operation in the grid- connected mode, regulated power control in
autonomous micro-grid mode, smooth transition between autonomous mode and PV or PQ grid
connected modes and vice versa, reduced voltage distortion under heavily nonlinear loading conditions,
and robust control performance under islanding detection delays. Evaluation results are presented to
demonstrate the flexibility and effectiveness of the proposed controller
GRID INTERCONNECTION OF RENEWABLE ENERGY SOURCES AT DISTRIBUTION LEVEL WITH P...Pradeep Avanigadda
Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. This project presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. With such a control, the combination of grid-interfacing inverter and the 3-phase 4-wire linear/non-linear unbalanced load at point of common coupling appears as balanced linear load to the grid. This new control concept is demonstrated with extensive MATLAB/ Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.
It is type of hybrid energy system consist of a photovoltaic array coupled with a wind turbine.This would create more output from the wind turbine during the winter, whereas during the summer, the solar panels would produce their peak output.Solar Photovoltaic (PV) – Wind Turbine (WT) Hybrid System is the best way to utilize not just one local available RE resource but multiple renewable RE resources.
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
The Nine-Switch Inverter(NSI) is a recently developed dual output converter. It can be used to drive two three-phase loads independently. As a substitute to two separate conventional voltage source inverters, the NSI has been, already, proposed in various industrial applications to reduce the numberof semiconductor switches and its associated energy losses and drive circuitry. On the other hand, the Direct Torque Control(DTC) is a robust control scheme of AC motors, which consist of selecting proper state vectors of a conventional voltage source inverter. The NSI, having a different working principle from the conventional voltage source inverter and taking into account the varying influence of active space vectors on motor’s torque and stator flux, a Direct Torque Control is suggested in this paper to, efficiently, drive two induction motors independently, while minimizing the torque and stator flux ripples of both motors. Simulations results confirm the effectiveness of the proposed algorithm. In addition, application of this newly proposed control scheme in operation of an Electric Vehicule (EV) is demonstrated.
Mitigating The Power Fluctuation Of PMSG Wind Turbine In A Microgrid By Optim...IJTET Journal
Abstract— The major problem of PMSG wind turbine are power fluctuation. And this problem is overcome by new optimization technique and circuit model of the Superconducting Magnetic Energy Storage (SMES) with Fault Current Limiter (FCL) in a micro grid. Normally, SMES-FCL circuit which contain superconducting coil. In case of without fault condition, SMES-FCL act as the SMES unit to mitigate the power fluctuation of PMSG. Under fault condition, the SC is automatically connected to the system and it can be used as FCL to reduce the fault current. Then, the voltage drop of PMSG and fault current unit will be mitigated. By the energy function method is used to determine the optimal problem. Finally, this MATLAB result shows the superior control effect compare to the conventional method.
Fuzzy Based Analysis of Inverter Fed Micro Grid in Islanding Operation-Experi...IJPEDS-IAES
Islanding operation in essence connotes isolating part of a power system not unlike distributed generation. This thesis puts forward fuzzy logic controller for inverter fed micro-grid in islanding operations which is assessed using hardware implementation. It’s assisted by power electronics which imparts the control and flexibility essential for the micro grid concept. A correctly designed controller guarantees that the micro grid can meet its utility’s demands. The efficacy and robustness is deliberated in the design of fuzzy system. The testing is performed by employing hardware components namelyATMEGA-328microcontroller, TLP250 opto-coupler and a MOSFET circuit. The test results demonstrate very good consistency and show noteworthy implications of the control of micro grid using inverters and fuzzy controllers.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Improving Voltage Profile of Islanded Microgrid using PI Controller IJECEIAES
In islanding operating mode of microgrid, the voltage and frequency of system must be maintained by the microgrid, or else the system will crumble due to the characteristics of different distributed generators (DG) utilized in microgrid. The voltage and frequency lost provision when main grid is disconnected. This paper presents PI controller based voltage controller to regulate voltage to its normal condition. The controller is proposed to be utilized individually with each distributed generator (DG) in microgrid. The controller compares inverter output voltage with voltage at point of common coupling (PCC) and its output is feed to PWM pulse generator to generate appropriate pulses for inverter to regulate voltage to its nominal value. The simulation results of proposed system are shown using MATLAB/Simulink platform.
Intelligent Control for Doubly Fed Induction Generator Connected to the Elect...IJPEDS-IAES
In this paper we are interested in optimizing the wind power capture, using the Doubly Fed Induction Generator (DFIG). This machine is preferred to other types of variable speed generator because of their advantages in economic terms and control. The Artificial Neural Network (ANN) based on Direct Torque Control (DTC) which is used to control the electromagnetic torque in order to extract the maximum power. The main objective of this intelligent technique is to replace the conventional switching table by a voltage selector based on (ANN) to reduce torque and flux ripples. Moreover, the fuzzy logic controller is used to grid side converter to keep DC link voltage constant, and also to achieve unity power factor operation. The main advantage of the two control strategies proposed in this paper is that they are not influenced by the variation of the machine parameter. The pitch control is also presented to limit the generator power at its rated value. Simulation results of 1,5 MW, for (DFIG) based Wind Energy Conversion System (WECS) confirm the effectiveness and the performance of the global proposed approaches.
Most of generators utilized in wind turbines are the Doubly-Fed Induction Generator (DFIG). Indirect matrix converter (IMC) is a candidate for substituting the traditional back-to-back converter in the future due to advantages gained by elimination of electrolytic capacitor. Starting DFIG wind turbines and synchronizing to the grid is a challenge in practice because of large inrush currents that could damage switches. Synchronizing the DFIG wind turbine controlled by the IMC is presented in this paper. Also, maximum power point tracking algorithm performance of this configuration is examined. A laboratory scale prototype of the proposed configuration is built. Experimental results have confirmed effectiveness of this configuration.
A Hybrid Control Scheme for Fault Ride-Through Capability using Line-Side Con...Suganthi Thangaraj
As the wind power installations are increasing in number, Wind Turbine Generators (WTG) are required to have Fault Ride-Through (FRT) capabilities. Lately developed grid operating codes demand the WTGs to stay connected during fault conditions, supporting the grid to recover faster back to its normal state. In this paper, the generator side converter incorporates the maximum power point tracking algorithm to extract maximum energy from wind turbine system. A hybrid control scheme for energy storage systems (ESS) and braking choppers for fault ride-through capability and a suppression of the output power fluctuation is proposed for permanent-magnet synchronous generator (PMSG) wind turbine systems. During grid faults, the dc-link voltage is controlled by the ESS instead of the line-side converter (LSC), whereas the LSC is exploited as a STATCOM to inject reactive current into the grid for assisting in the grid voltage recovery. A simple model of the proposed system is developed and simulated in MATLAB environment. The effectiveness of the system is validated through extensive simulation results
STATCOM Based Wind Energy System by using Hybrid Fuzzy Logic ControllerIJMTST Journal
The influence of the hybrid system in the grid system concerning the power quality measurements are the active power, reactive power, voltage deviation, flicker, harmonics, and electrical behavior of switching operation and these are measured according to International Electro-Technical Commission (IEC). The STATCOM provides reactive power support to hybrid system and load. These voltage fluctuations can be eliminated with the help of advanced reactive power compensator device such as SVC and STATCOM. This work focus on design, modeling and analysis of FACTS device in wind farm interconnected with grid during fault. These devices can be controlled by Synchronous Reference Frame theory. The performance is analyzed with the help of PI controller and Fuzzy logic technique. by using Matlab/Simulink Model.
The main objective of the present work is to describe the sensorless control of interior permanent magnet synchronous motor (IPMSM) for embeded systems in traction applications using the Model Reference Adaptive System (MRAS) method for speed estimation. The algorithm of this method has been adapted with the mathematical model of the motorized wheels electric vehicle. The command used is the DTC. Sensorless DTC of IPMS in-wheel motor based on MRAS for electric vehicle is simulated by Matlab/Simulink. The simulation results show the effectiveness of this proposed sensorless DTC control used for embedded system applications.
Improving Stability of Utility-Tied Wind Generators using Dynamic Voltage Res...IJMTST Journal
The generation of electricity using wind power is significantly increasing and has received considerable attention in recent years. One important problem with the induction generator based wind farms is that they are vulnerable to voltage disturbances and short circuit faults. Any such disturbance may cause wind farm outages. Since wind power contribution is in considerable percentage, such outages may lead to power system stability issues and also violate the grid code requirements. Thus, improving the reliability of wind farms is essential to maintain the stability of the system. The proposed strategy is to use Dynamic Voltage Restorer (DVR), which is one of the promising devices to compensate the voltage disturbance and to improve the stability of the system. It provides the wind generator with the fault ride through capability and improves the reliability of the system. Fuzzy Logic controller is used as a controller in order to control the dc link voltages and to reduce the harmonics. Simulation results for a 2 MW wind turbine are presented, especially for asymmetrical grid faults. They show the effectiveness of the DVR in comparison to the low voltage ride-through of the DFIG using a crowbar that does not allow continuous reactive power production. Extensive simulation results are included to illustrate the operation of DVR and fault compensation.
ER Publication,
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International Journals,
High Impact Journals,
Monthly Journal,
Good quality Journals,
Research,
Research Papers,
Research Article,
Free Journals, Open access Journals,
erpublication.org,
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How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
1. 09/14/13 1
VOLTAGE DROOP CONTROL INVOLTAGE DROOP CONTROL IN
MICRO GRID BY DISTRIBUTEDMICRO GRID BY DISTRIBUTED
GENERATORSGENERATORS
Guided by
IET.Trichy
56-A, PERIYAR NAGAR,
TRICHY-5
CONTACT:9952297180, 9600339946
IET.Trichy
2. 09/14/13 2
ABSTRACTABSTRACT
Autonomous microgrids, an important task is
to share the load demand using multiple
distributed generation (DG) units.
However, a low-voltage microgrid, real and
reactive compensation is the main thought.
In microgrid configuration, reactive power
sharing is more challenging.
IET.Trichy
3. 09/14/13 3
DROOP CONTROL STRATEGY:
A droop control scheme uses only local
power to detect changes in the system and
adjust the operating points of the generators
accordingly (e.g. load sharing).
The droop control uses the real power out of
a generator to calculate the ideal operating
frequency.
IET.Trichy
4. 09/14/13 4
FREQUENCY & VOLTAGEFREQUENCY & VOLTAGE
DROOP CONTROL:DROOP CONTROL:
IET.Trichy
5. 09/14/13 5
MICRO GRID:
A microgrid is a localized grouping of
electricity generation, energy storage, and
loads that normally operates connected to a
traditional centralized grid (macrogrid).
Generation and loads in a microgrid are
usually interconnected at low voltage.
Small power stations of 5–10 MW to serve
the micro-grids
IET.Trichy
7. 09/14/13 7
EXISTING SYSTEM
The distributed generation focus on the idea
that inverters will tie the energy source into
the electrical system.
Studies on control schemes for power
balance, fault tolerance and system stability
have been conducted but focus on the control
of the power electronics topology and
switching schemes to obtain results.
IET.Trichy
8. 09/14/13 8
The widespread use of inverters providing
power to a microgrid system can create
higher-order harmonics due to internal
switching.
IET.Trichy
9. 09/14/13 9
PROPOSED SYSTEM
The paper studies a distributed system with two
distributed generation subsystems. In each
subsystem there are two voltage source inverters
and two loads.
The controller uses an inner loop that regulates the
current and an outer loop that controls voltage. A
droop control calculates a reference voltage and
compares that operating point with the current
operating conditions creating an error signal. The
error signals are then used by the controller to
adjust the PWM signal for driving a full-bridge
inverter.
IET.Trichy
10. 09/14/13 10
A droop control calculates a reference
voltage and compares that operating point
with the current operating conditions creating
an error signal. The error signals are then
used by the controller to adjust the PWM
signal for driving a full-bridge inverter.
IET.Trichy
11. 09/14/13 11
INJECTION OF REAL POWER DISTURBANCES
& INTEGRAL CONTROL STRATEGY
Low- Bandwidth synchronization signals from
the central controller
Real power disturbance will then cause the
integral control term to regulate the DG
output voltage and maintain the reactive
power sharing.
IET.Trichy
12. 09/14/13 12
The paper proposes to modify the droop
characteristic such that generation is
increased at nodes with a large local load so
that power exchanges through the distribution
system are reduced from those that would
occur in conventional droop schemes.
This configuration can improve waveform
quality by reducing the total harmonic
distortion
IET.Trichy