The transmission overhead line is one of the vital elements in the power system for transmitting the electrical energy. In the transmission, the disturbances are often occurred. In the conventional algorithm, alpha and beta (mode) currents generated by Clarke’s transformation are utilized to convert the signal of Discrete Wavelet Transform (DWT) to obtain the Wavelet Transform Coefficient (WTC) and the Wavelet Coefficient Energy (WCE). This study introduces a new algorithm, called Modified Clarke for fault detection and classification using DWT and Back-Propagation Neural Network (BPNN) based on Clarke’s transformation on transmission overhead line by adding gamma current in the system. Daubechies4 (Db4) is used as a mother wavelet to decompose the high frequency components of the signal error. Simulation is performed using PSCAD / EMTDC transmission system modeling and carried out at different locations along the transmission line with different types of fault, fault resistances, fault locations and fault of the initial angle on a given power system model. The simulated fault types are in the study are the Single Line to Ground, the Line To Line, the Double Line to Ground and the Three Phases. There are four statistic methods utilized in the present study to determine the accuracy of detection and classification of faults. The result shows that the best and the worst structures of BPNN occurred on the configuration of 12-24-48-4 and 12-12-6-4, respectively. For instance, the error using Mean Square Error Method. The Error Of Clarke’s, Without Clarke’s and Modified Clarke’s are 0.05862, 0.05513 and 0.03721 which are the best, respectively, whereas, the worst are 0.06387, 0.0753 and 0.052, respectively. This indicates that the Modified Clarke’s result is in the lowest error. The method is successfully implement can be utilized in the detection and classification of fault in transmission line by utilities and power regulation in power system planning and operation.
These slides are all about Phasor Measurement Units (PMUs). An introduction to PMU is presented as a preliminary knowledge for the course 'Distribution Generation and Smart Grid'. Your valuable suggestions are welcome.
Transmission line is one the important compnent in protection of electric power system because the transmission line connects the power station with load centers.
The fault includes storms, lightning, snow, damage to insulation, short circuit fault [1].
Fault needs to be predicted earlier in order to be prevented before it occur
Fault location and correction are important in case of any power systems. This process has to be prompt and accurate so that system reliability can be improved , outage time can be reduced and restoration of system from fault can be accelerated.
Fault location calculation using Magnetoresistance sensor is described here.
Automatic generation control (AGC) is a system for adjusting the power output of multiple generators at different power plants, in response to changes in the load. Since a power grid requires that generation and load closely balance moment by moment, frequent adjustments to the output of generators are necessary. The balance can be judged by measuring the system frequency; if it is increasing, more power is being generated than used, which causes all the machines in the system to accelerate. If the system frequency is decreasing, more load is on the system than the instantaneous generation can provide, which causes all generators to slow down.
High Voltage Direct Current technology has certain characteristics which
make it especially attractive for transmission system applications. HVDC
transmission system is useful for long-distance transmission, bulk power delivery and
long submarine cable crossings and asynchronous interconnections. The study of
faults is essential for reasonable protection design because the faults will induce a
significant influence on operation of HVDC transmission system. This paper provides
the most dominant and frequent faults on the HVDC systems such as DC Line-to-
Ground fault and Line-to-Line fault on DC link and some common types of AC faults
occurs in overhead transmission system such as Line-to-Ground fault, Line-to-Line
fault and L-L-L fault. In HVDC system, faults on rectifier side or inverter side have
major affects on system stability. The various types of faults are considered in the
HVDC system which causes due to malfunctions of valves and controllers, misfire
and short circuit across the inverter station, flashover and three phase short circuit.
The various faults occurs at the converter station of a HVDC system and
Controlling action for those faults. Most of the studies have been conducted on line
faults. But faults on rectifier or inverter side of a HVDC system have great impact on
system stability. Faults considered are fire-through, misfire, and short circuit across
the inverter station, flashover, and a three-phase short circuit in the ac system. These
investigations are studied using matlab simulink models and the result represented in
the form of typical time responses.
These slides are all about Phasor Measurement Units (PMUs). An introduction to PMU is presented as a preliminary knowledge for the course 'Distribution Generation and Smart Grid'. Your valuable suggestions are welcome.
Transmission line is one the important compnent in protection of electric power system because the transmission line connects the power station with load centers.
The fault includes storms, lightning, snow, damage to insulation, short circuit fault [1].
Fault needs to be predicted earlier in order to be prevented before it occur
Fault location and correction are important in case of any power systems. This process has to be prompt and accurate so that system reliability can be improved , outage time can be reduced and restoration of system from fault can be accelerated.
Fault location calculation using Magnetoresistance sensor is described here.
Automatic generation control (AGC) is a system for adjusting the power output of multiple generators at different power plants, in response to changes in the load. Since a power grid requires that generation and load closely balance moment by moment, frequent adjustments to the output of generators are necessary. The balance can be judged by measuring the system frequency; if it is increasing, more power is being generated than used, which causes all the machines in the system to accelerate. If the system frequency is decreasing, more load is on the system than the instantaneous generation can provide, which causes all generators to slow down.
High Voltage Direct Current technology has certain characteristics which
make it especially attractive for transmission system applications. HVDC
transmission system is useful for long-distance transmission, bulk power delivery and
long submarine cable crossings and asynchronous interconnections. The study of
faults is essential for reasonable protection design because the faults will induce a
significant influence on operation of HVDC transmission system. This paper provides
the most dominant and frequent faults on the HVDC systems such as DC Line-to-
Ground fault and Line-to-Line fault on DC link and some common types of AC faults
occurs in overhead transmission system such as Line-to-Ground fault, Line-to-Line
fault and L-L-L fault. In HVDC system, faults on rectifier side or inverter side have
major affects on system stability. The various types of faults are considered in the
HVDC system which causes due to malfunctions of valves and controllers, misfire
and short circuit across the inverter station, flashover and three phase short circuit.
The various faults occurs at the converter station of a HVDC system and
Controlling action for those faults. Most of the studies have been conducted on line
faults. But faults on rectifier or inverter side of a HVDC system have great impact on
system stability. Faults considered are fire-through, misfire, and short circuit across
the inverter station, flashover, and a three-phase short circuit in the ac system. These
investigations are studied using matlab simulink models and the result represented in
the form of typical time responses.
Conventional and emerging converter technologies in hvdc power transmission s...Naveed Shahzad
The efficiency of HVDC system is primarily associated with power electronic converters which are playing the key role in transforming AC to DC and vice versa. There have been several converter topologies known and implemented in HVDC system throughout the world, however the major converter topologies are line commutated-current source converters (CSC) and self-commutated voltage source converters (VSC). This presentation provides an overview and comparison of CSC and VSC converters including their applications, advantages, limitations and new technological advancement related to CSC, and VSC including 2 level VSC and 3 level VSC and newer modular multilevel converter (MMC) topologies.
Fault location and correction are important in case of any power systems. This process has to be prompt and accurate so that system reliability can be improved , outage time can be reduced and restoration of system from fault can be accelerated.
Fault location calculation using Magnetoresistance sensor is described here.
To identify and simulate conventional type of disturbance on the overhead transmission line by using PSCAD / EMTDC software package
To develop mathematical model for various type of disturbance on overhead transmission line.
To develop a smart algorithm for fault detection using Artificial Neural Network (ANN) and Particle Swarm Optimization (PSO).
The concept of FACTS (Flexible Alternating Current Transmission System) refers to a family of power electronics-based devices able to enhance AC system controllability and stability and to increase power transfer capability.
As the fifth in a series of tutorials on the power system, Leonardo ENERGY introduces its minute lecture on voltage and frequency control, using the analogy of a metal/rubber plate to demonstrate the centralised nature of frequency control, whereas voltage control is more a local matter.
- This paper proposes a new technique of using discrete wavelet transform (DWT) and back-propagation neural network (BPNN) based on Clarke’s transformation for fault classification and detection on a single circuit transmission line. Simulation and training process for the neural network are done by using PSCAD / EMTDC and MATLAB. Daubechies4 mother wavelet (DB4) is used to decompose the high frequency components of these signals. The wavelet transform coefficients (WTC) and wavelet energy coefficients (WEC) for classification fault and detect patterns used as input for neural network training back-propagation (BPNN). This information is then fed into a neural network to classify the fault condition. A DWT with quasi optimal performance for preprocessing stage are presented. This study also includes a comparison of the results of training BPPN and DWT with and without Clarke’s transformation, where the results show that using Clarke transformation in training will give in a smaller mean square error (MSE) and mean absolute error (MAE). The simulation also shows that the new algorithm is more reliable and accurate.
Algorithm for Fault Location and Classification on Parallel Transmission Line...IJECEIAES
This paper proposed a new algorithm for fault location and classification using wavelet based on Clarke’s transformation to obtain the fault current. This novel method of fault current approach is studied by comparing the use of the glide path of the fault voltage. The current alpha and beta (Current Mode) were used to transform the signal using discrete wavelet transform (DWT). The fault location was determined by using the Clarke’s transformation, and then turned into a wavelet, which was very precise and thorough. The most accurate was the mother wavelet Db4 which had the fastest time and smallest error detection when compared with the other wavelet mothers. In this study, the Clarke’s transformation is also compared with the Karenbauer’s, which has produced results with similar error percentage. The simulation results using PSCAD / EMTDC software showed that the proposed algorithm could distinguish internal and external faults to get the current signal in the transformation of a signal fault.
Conventional and emerging converter technologies in hvdc power transmission s...Naveed Shahzad
The efficiency of HVDC system is primarily associated with power electronic converters which are playing the key role in transforming AC to DC and vice versa. There have been several converter topologies known and implemented in HVDC system throughout the world, however the major converter topologies are line commutated-current source converters (CSC) and self-commutated voltage source converters (VSC). This presentation provides an overview and comparison of CSC and VSC converters including their applications, advantages, limitations and new technological advancement related to CSC, and VSC including 2 level VSC and 3 level VSC and newer modular multilevel converter (MMC) topologies.
Fault location and correction are important in case of any power systems. This process has to be prompt and accurate so that system reliability can be improved , outage time can be reduced and restoration of system from fault can be accelerated.
Fault location calculation using Magnetoresistance sensor is described here.
To identify and simulate conventional type of disturbance on the overhead transmission line by using PSCAD / EMTDC software package
To develop mathematical model for various type of disturbance on overhead transmission line.
To develop a smart algorithm for fault detection using Artificial Neural Network (ANN) and Particle Swarm Optimization (PSO).
The concept of FACTS (Flexible Alternating Current Transmission System) refers to a family of power electronics-based devices able to enhance AC system controllability and stability and to increase power transfer capability.
As the fifth in a series of tutorials on the power system, Leonardo ENERGY introduces its minute lecture on voltage and frequency control, using the analogy of a metal/rubber plate to demonstrate the centralised nature of frequency control, whereas voltage control is more a local matter.
- This paper proposes a new technique of using discrete wavelet transform (DWT) and back-propagation neural network (BPNN) based on Clarke’s transformation for fault classification and detection on a single circuit transmission line. Simulation and training process for the neural network are done by using PSCAD / EMTDC and MATLAB. Daubechies4 mother wavelet (DB4) is used to decompose the high frequency components of these signals. The wavelet transform coefficients (WTC) and wavelet energy coefficients (WEC) for classification fault and detect patterns used as input for neural network training back-propagation (BPNN). This information is then fed into a neural network to classify the fault condition. A DWT with quasi optimal performance for preprocessing stage are presented. This study also includes a comparison of the results of training BPPN and DWT with and without Clarke’s transformation, where the results show that using Clarke transformation in training will give in a smaller mean square error (MSE) and mean absolute error (MAE). The simulation also shows that the new algorithm is more reliable and accurate.
Algorithm for Fault Location and Classification on Parallel Transmission Line...IJECEIAES
This paper proposed a new algorithm for fault location and classification using wavelet based on Clarke’s transformation to obtain the fault current. This novel method of fault current approach is studied by comparing the use of the glide path of the fault voltage. The current alpha and beta (Current Mode) were used to transform the signal using discrete wavelet transform (DWT). The fault location was determined by using the Clarke’s transformation, and then turned into a wavelet, which was very precise and thorough. The most accurate was the mother wavelet Db4 which had the fastest time and smallest error detection when compared with the other wavelet mothers. In this study, the Clarke’s transformation is also compared with the Karenbauer’s, which has produced results with similar error percentage. The simulation results using PSCAD / EMTDC software showed that the proposed algorithm could distinguish internal and external faults to get the current signal in the transformation of a signal fault.
The strategy is based on an autonomous distributed control
scheme in which the DC bus voltage level is used as an indicator of the power balance in the
microgrid. The autonomous control strategy does not rely on communication links or a
central controller, resulting in reduced costs and enhanced reliability. As part of the control
strategy, an adaptive droop control technique is proposed for PV sources in order to
maximize the utilization of power available from these sources while ensuring acceptable
levels of system voltage regulation
Multilevel Cascaded-TypeDynamic Voltage Restorer with Fault Current Limiting ...Asoka Technologies
This paper presents a new multilevel cascaded-type dynamic voltage restorer (MCDVR) with fault current limiting function. This topology can operate in two operational modes: 1) compensation mode for voltage fluctuations and unbalances, and 2) short-circuit current limiting mode. The current limiting function of the MCDVR is performed by activating anti-parallel thyristors during the short-circuit fault, and deactivating them during normal operation. The mathematical model of the MCDVR system is also established in this paper. The control scheme design and optimal parameter selection are outlined based on the detailed theoretical analysis of the converter. The transient states of the MCDVR in both the compensation mode and current-limiting mode are also analyzed. Simulation results based on the PSCAD/EMTDC software and experimental results on a laboratory setup help to validate the proposed topology and the theoretical analysis.
Signal-Energy Based Fault Classification of Unbalanced Network using S-Transf...idescitation
This paper presents a technique for diagnosis of the type of fault and the faulty
phase on overhead transmission line. The proposed method is based on the multiresolution
S-Transform and Parseval’s theorem. S-Transform is used to produce instantaneous
frequency vectors of the voltage signals of the three phases, and then the energies of these
vectors, based on the Parseval’s theorem, are utilized as inputs to a Probabilistic Neural
Network (PNN). The power system network considered in this study is three phase
Transmission line with unbalanced loading simulated in the PowerSim Toolbox of
MATLAB. The fault conditions are simulated by the variation of fault location, fault
resistance, fault inception angle. The training is conducted by programming in MATLAB.
The robustness of the proposed scheme is investigated by synthetically polluting the
simulated voltage signals with White Gaussian Noise. The suggested method has produced
fast and accurate results. Estimation of fault location is intended to be conducted in future.
Index Terms—
Small Signal Modelling of a Buck Converter using State Space Averaging for Ma...paperpublications3
Abstract: Nowadays, step-down power converters such as buck scheme are widely employed in a variety of applications such as power supplies, spacecraft power systems, hybrid vehicles and power supplies in particle accelerators. This paper presents a comprehensive small-signal model for the DC-DC buck converter operated under Continuous Conduction Mode (CCM) for a magnetic load. Initially, the buck converter is modeled using state-space average model and dynamic equations, depicting the converter, are derived. The proposed model can be used to design powerful, precise and robust closed loop controller that can satisfy stability and performance conditions of the DC-DC buck regulator. This model can be used in any DC-DC converter (Buck, Boost, and Buck-Boost) by modifying the converter mathematical equations.
Total Harmonic Distortion of Dodecagonal Space Vector ModulationIJPEDS-IAES
Space vector modulation technique is one of the best PWM techniques which have been implemented to the Multilevel inverter circuit to get the purely sinusoidal cuurent. This is a important algorithm which is implemented in open wind induction motor. This type of I.M has great impact on Electric Drive system. SVM is nothing but the technique of switching algorithm. The Hexagonal space vector modulation has been implemented before, but elimination of higher order harmonics is not possible. Torque pulsation arises. Speed control of Induction motor was not smooth. So Dodecagonal (12) structure developed. A 12 side polygonal space vector structure is meant for eliminating (6n±1) harmonics in the phase current waveform throughout the modulating range. A high resolution of PWM technique is proposed involving multiple 12 sided polygonal (Dodecagonal) structure that can generate highly sinusoidal voltage at a reduced switching frequency. In this paper different values of frequencies have been taken for harmonic analysis. SVM method features a higher level of dc-bus voltage utilization compared to the conventional PWM.
"Use of PMU data for locating faults and mitigating cascading outage"Power System Operation
Large number of Phasor Measurement Units (PMUs)
as a part of the system-wide synchrophasor monitoring
system are being deployed in the USA and around
the world. Transmission Operators (TOs), as well as
Independent system Operators (ISOs) or Regional
Transmission Operators (RTOs) are looking at leveraging
this high-resolution data to improve their ability to
monitor and control the grid. This paper elaborates on
the use of PMU data to locate faults in the power system,
and provides a prediction method for monitoring how the
system behaves after complex switching actions caused
by cascading events. A method for arresting cascades by
performing controlled islanding is also proposed.
We first present a novel system-wide fault location
method for transmission lines utilizing electromechanical
wave propagation phenomena. The method uses
synchrophasor measurements during disturbances
obtained from phasor measurement units sparsely
located in the network. The method determines the time-
of-arrival of electromechanical waves propagating from
the fault point to sparsely located PMUs. By taking the
speed of electromechanical wave propagation as well
as topology of the network into account, the method is
able to detect the faulty line. Finally, by adding fictitious
buses inside faulty line and applying binary search
method, location of fault is accurately pinpointed. The
main advantage of the proposed method is the use of
limited number of existing PMUs, which reduces the
cost of implementation. Test results reveal the high
accuracy of the method in detecting and locating faults.
Early prediction of cascade events outages followed
by immediate and proper control actions can prevent
Power System Simulation Laboratory Manual Santhosh Kumar
Date:-(13-07-2016)
Hii friends
I Have Attached Our Power System Simulation Laboratory Manual Here for your Reference
Kindly download the Manual and Start Writing the Observation Note By Mr.G.Shivaraj-AP/EEE
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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.
Carbon nano tube based delay model for high speed energy efficient on chip da...elelijjournal
Speed is a major concern for high density VLSI networks. In this paper the closed form delay model for current mode signalling in VLSI interconnects has been proposed with resistive load termination.RLC interconnect line is modelled using characteristic impedance of transmission line and inductive effect.The inductive effect is dominant at lower technology node is modelled into an equivalent resistance. In this model first order transfer function is designed using finite difference equation, and by applying the boundary conditions at the source and load termination. It has been observed that the dominant pole determines system response and delay in the proposed model. Using CNIA tool (carbon nanotube interconnect analyzer) the interconnect line parameters has been estimated at 45nm technology node. The novel proposed current mode model superiority has been validated for CNT type of material. It superiority factor remains to 66.66% as compared to voltage mode signalling. And current mode dissipates 0.015pJ energy where as VM consume 0.045pJ for a single bit transmission across the interconnect over CNT
material. Secondly the damping factor of a lumped RLC circuit is shown to be a useful figure of merit.
Similar to FAULT DETECTION AND CLASSIFICATION ON TRANSMISSION OVERHEAD LINE USING BPPN AND WAVELET TRANSFORMATION BASED ON CLARKE’S TRANSFORMATION (20)
Daya dihasilkan oleh pembangkit yang dikoppel dengan generator.Tegangan yang dihasilkan akan disalurkan ke saluran transmisi setelah dinaikkan tegangannya mengguna trafo step up,kemudian ke saluran distribusi setelah tegangnnya diturunkan menggunakan trafo step down.Melalui trafo distribusi daya disalurkan ke pelanggan
Transmisi tenaga listrik adalah proses menghantarkan listrik dari sumber ke tempat pengguna. Mari kita jelajahi bagaimana transmisi tenaga listrik bekerja dan komponen-komponennya.
Gardu Induk SF6 atau GIS merupakan Gardu Induk yang menggunakan media isolasi elektrik berupa Gas SF6 pada semua peralatan utama di Switchgear. Hal yang harus diperhatikan dalam penggunaan gas SF6 yaitu tekanan pada gas harus sesuai dengan standarnya. GIS 150Kv. Pelabuhan Ratu merupakan salah satu Gardu Induk yang menggunakan gas SF6 sebagai media isolasi
Gardu induk adalah suatu instalasi yang terdiri dari peralatan listrik yang berfungsi untuk : 1) Mengubah tenaga listrik tegangan tingi yang satu ke tegangan tinggi yang lainnya atau tegangan menengah. 2) Pengukuran, pengawasan, operasi serta pengaturan pengamanan sistem tenaga listrik.
Stabilisasi operasi sistem tenaga listrik didefinisikan sebagai kemampuan dari sistem untuk menjaga kondisi operasi yang seimbang dan kemampuan sistem tersebut untuk kembali ke kondisi operasi normal ketika terjadi gangguan
Proteksi sistem tenaga listrik bertujuan utama untuk menjaga keamanan dan keselamatan baik bagi peralatan listrik maupun pengguna. Dengan adanya proteksi yang efektif, gangguan seperti hubung singkat dan arus lebih dapat dideteksi dan diatasi dengan cepat, sehingga mencegah terjadinya kebakaran, kerusakan peralatan, atau bahaya bagi pengguna.
Jaringan Tegangan Menengah (JTM) atau sering disebut Jaringan Distribusi Primer adalah suatu bagian daripada sistem tenaga listrik antara gardu induk dan gardu sitribusi.
Pengertian umum Gardu Distribusi tenaga listrik yang paling dikenal adalah suatu bangunan gardu listrik berisi atau terdiri dari instalasi Perlengkapan Hubung Bagi Tegangan Menengah (PHB-TM), Transformator Distribusi (TD) dan Perlengkapan Hubung Bagi Tegangan Rendah (PHB-TR) untuk memasok kebutuhan tenaga listrik bagi para pelanggan baik dengan Tegangan Menengah (TM 20 kV) maupun Tegangan Rendah (TR 220/380V).
DISTRIBUSI Jaringan Tegangan Rendah adalah bagian hilir dari sistem tenaga listrik pada tegangan distribusi di bawah 1000 Volt, yang langsung memasok kebutuhan listrik tegangan rendah ke konsumen. Di Indonesia, tegangan operasi transmisi SUTR saat ini adalah 220/ 380. Volt.
Sistem transmisi listrik berkembang seiring dengan perjalanan waktu dan inovasi teknologi. Awalnya, sistem transmisi listrik terbatas pada jarak pendek dan menggunakan tegangan rendah. Namun, penemuan generator listrik dan transformator oleh tokoh seperti Nikola Tesla membuka pintu bagi penggunaan tegangan tinggi dan pengiriman listrik jarak jauh. Perang arus listrik antara Thomas Edison dan George Westinghouse memunculkan pilihan transmisi listrik berbasis arus bolak-balik (AC) dengan tegangan tinggi, yang akhirnya menjadi standar industri karena keefisiensiannya. Seiring waktu, perkembangan teknologi terus mendukung kemajuan dalam sistem transmisi, termasuk pengenalan peralatan modern seperti circuit breakers dan sistem monitoring otomatis. Dengan pertumbuhan kebutuhan energi dan pergeseran ke sumber energi terbarukan, sistem transmisi listrik terus mengalami transformasi untuk memenuhi tantangan keberlanjutan dan efisiensi energi.
Gardu induk adalah sebuah subsistem dari system penyaluran (teransmisi) tenaga listrik. Gardu indu memiliki perang penting dari pengoprasianya, tidak dapat di pisahkan dari system penyaluran secara keseluruhan
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Jaringan tengangan mengengah atau sering disebut jaringan distribusi primer merupakan bagian dari sistem tenaga listrik antara gardu induk dan gardu distribusi
Distribusi Tegangan Menengah adalah jaringan yang berfungsi untuk menyalurkan tenaga listrik dari gardu induk ke gardu distribusi atau kekonsumen dengan tegangan yang disalurkan adalah 20 kv.
Gardu distribusi adalah suatu fasilitas dalam sistem kelistrikan yang berfungsi untuk mendistribusikan daya listrik dari gardu induk atau stasiun transformator ke pelanggan akhir seperti rumah, industri, dan bisnis. Gardu distribusi bertindak sebagai hub yang mengatur dan menyebarkan daya listrik pada tingkat tegangan yang lebih rendah, sesuai dengan kebutuhan pengguna di area tertentu.
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Gardu Induk merupakan sub (transmisi) tenaga listrik, atau merupakan penyaluran (transmisi). Sebagai sub sistem dari sistem penyaluran (transmisi), gardu induk mempunyai peranan penting dalam pengoperasiannya tidak dapat dipisahkan dari sistem penyaluran (transmisi) secara keseluruhan
Transmisi tenaga listrik merupakan proses penyaluran tenaga listrik dari tempat pembangkit tenaga listrik (Power Plant) hingga substation distribution sehingga dapat disalurkan sampai pada konsumen pengguna listrik melalui suatu bahan konduktor
Gas Insulated Substation (GIS) didefinisikan sebagai rangkaian beberapa peralatan yang terpasang di dalam sebuah metal enclosure dan diisolasi oleh gas bertekanan(8 ).Pada umumnya gas bertekanan yang digunakan adalah Sulfur Hexafluoride (SF6). Enclosure adalah selubung pelindung yang berfungsi untuk menjaga bagian bertegangan terhadap lingkungan luar.
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Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
FAULT DETECTION AND CLASSIFICATION ON TRANSMISSION OVERHEAD LINE USING BPPN AND WAVELET TRANSFORMATION BASED ON CLARKE’S TRANSFORMATION
1. UTMUNIVERSITI TEKNOLOGI MALAYSIA
FAULT DETECTION AND CLASSIFICATION
ON TRANSMISSION OVERHEAD LINE
USING BPPN AND WAVELET
TRANSFORMATION BASED ON CLARKE’S
TRANSFORMATIONBy
MAKMUR SAINI
SUPERVISED BY
PROF.IR.DR.ABDULLAH ASUHAIMI BIN MOHD ZIN
CO SUPERVISOR BY
PROF.IR.DR.MOHD WAZIR BIN MUSTAFA
2. Abstract
The transmission overhead line is one of the vital elements in the power
system for transmitting the electrical energy. In the transmission, the
disturbances are often occurred. In the conventional algorithm, alpha and
beta (mode) currents generated by Clarke’s transformation are utilized to
convert the signal of Discrete Wavelet Transform (DWT) to obtain the
Wavelet Transform Coefficient (WTC) and the Wavelet Coefficient Energy
(WCE). This study introduces a new algorithm, called Modified Clarke for
fault detection and classification using DWT and Back-Propagation Neural
Network (BPNN) based on Clarke’s transformation on transmission overhead
line by adding gamma current in the system. Daubechies4 (Db4) is used as
a mother wavelet to decompose the high frequency components of the signal
error. Simulation is performed using PSCAD / EMTDC transmission system
modeling and carried out at different locations along the transmission line
with different types of fault, fault resistances, fault locations and fault of the
initial angle on a given power system model
3. Abstract
The simulated fault types are in the study are the Single Line to Ground, the
Line To Line, the Double Line to Ground and the Three Phases. There are
four statistic methods utilized in the present study to determine the accuracy
of detection and classification of faults. The result shows that the best and
the worst structures of BPNN occurred on the configuration of 12-24-48-4
and 12-12-6-4, respectively. For instance, the error using Mean Square Error
Method. The Error Of Clarke’s, Without Clarke’s and Modified Clarke’s are
0.05862, 0.05513 and 0.03721 which are the best, respectively, whereas,
the worst are 0.06387, 0.0753 and 0.052, respectively. This indicates that the
Modified Clarke’s result is in the lowest error. The method is successfully
implement can be utilized in the detection and classification of fault in
transmission line by utilities and power regulation in power system planning
and operation.
4. Introduction
The proposed approach combines the decomposition of
electromagnetic wave propagation modes, using the Clarke’s
transformation of signal processing, given by the discrete
wavelet transformation based upon the maximum signal
amplitude (WTC) 2
to determine the time intrusion. We made
extensive use of simulation software PSCAD / EMTDC which
resulted in fault of the simulation of the transient signal
transmission line parallel with the number of data points. into a
two-phase signal.
5. Introduction
For one kind of fault, this data is then transferred to
MATLAB with the help of Clarke’s transformation to
convert the three-phase signal.
The signal is then transformed into Mother Wavelet.
We manipulated several mothers wavelet such as DB4,
Sym4, Coil4 and Db8 for comparison in terms of time
and the distance estimation fault in parallel
transmission line.
.
6. . Clarke’s Transformation
Clarke's transformation, also referred to as (αβ) transformation, is
a mathematical transformation to simplify the analysis of a series
of three phases (a, b, c). It is a two-phase circuit (αβ0) stationery
and conceptually very similar to the (dqo) transformation.
= =
7. Fault Characterization in Clarke’s Transformation
1. Single line to Ground Fault (AG)
The egg line to ground fault (AG), assuming grounding resistance is zero. The instantaneous boundary
conditions are : = = 0 and = 0
then the boundary condition instantaneous are:
= 2/3 ; = 0; and = 1/3
2 Line to line Fault (AB)
The egg line to ground fault (AB), assuming grounding resistance is zero. The instantaneous boundary
conditions are : = 0 = - and = -
then the boundary condition instantaneous are:
= , = - and = 0
3 Line to line to Ground Fault (ABG)
The egg line to ground fault (ABG), assuming grounding resistance is zero. The instantaneous boundary
conditions are : = 0 , = and = = 0
then the boundary condition instantaneous are:
= - - = - ; and = +
10. Algorithm design proposed
.
In this study, the simulations were performed using PSCAD, and the
simulation results were obtained from the fault current signal.
The steps performed for this study were:
Finding the input to the Clarke transformation and wavelet transform. The
signal flow of PSCAD was then converted into m. files (*. M) and then
converted into mat. Files (*mat).with a sampling rate and frequency
dependent 0.5 Hz – 1 MHz .
Determining the data stream interference, where the signal was
transformed by using the Clarke transformation to convert the transient
signals into the signal’s basic current (Mode).
Transforming the mode current signals again by using DWT and WTC,
which were the generated coefficients, and then squared to be in order to
obtain the maximum signal amplitude to determine the timing of the
interruption.
Processing the ground mode and aerial mode and (WTC)2
using Bewley
Lattice diagram of the initial wave to determine the fault location
14. Simulation Model and Results
The system was connected with the sources at each end, as shown in Fig.
This system was simulated using PSCAD/EMTD. For the case study, the
simulation was modeled on a 230 kV double circuit transmission line,
which was 200 km in length. Transmission Line
Transmission data:
Z1=Z2 = 0.03574 + j 0.5776 Zo = 0.36315 +j 1.32.647
Fault Starting = 0.22 second Duration in fault = 0.15 Second
Fault resistance = 0.001 , 25, 50, 75 and 100 ohm
Fault Inception Angle = 0 , 15, 30 , 45 ,60, 90 , 120 and 150 degree
Source A and B Z1 = Z2 = Zo = 9.1859 + j 52.093 Ohm
28. The obtained result for different inception fault using DWT
and BPNN with configuration (12-24-48-4)
29. The comparison result for model BPNN and PRN based on Clarke’s
transformation with configuration (12-24-48-4)
30. The comparison SE for model BPNN and PRN based on Clarke’s
transformation
31. VE comparison for model BPNN and PRN based on
Clarke’s transformation
32. Comparison of MSE and MAE for Back Propagation
Neural Network, Pattern Recognition Network and Fit
Network Algorithm
33. This paper proposes a technique of using a combination of discrete
wavelet transform (DWT) and back-propagation neural networks (BPPN)
with and without Clarke’s transformation, in order to identify fault
classification and detection on parallel circuit transmission lines. This
technique applies Daubechies4 (Db4) as a mother wavelet. Various case
studies have been studied, including variation distance, the initial angle
and fault resistance. This study also includes comparison of the results of
training BPPN and DWT with and without Clarke’s transformation, where
the results show that using Clarke’s transformation will produce smaller
MSE and MAE, compared to without Clarke’s transformation. Among the
three structures, the Architects result was the best, which was 12-24-48-
12. Four statistical methods are utilized in the present study to determine
the accuracy of detection and classification faults, suggesting that the
Back Propagation Neural Network results in the lowest error thus it is the
best compared with Pattern Recognition Network and Fit Network.
Conclusion