Review of STATCOM Effects on Relay Protection of Power System

2013 ◽  
Vol 811 ◽  
pp. 639-642
Author(s):  
Xue Song Zhou ◽  
Chun Ji ◽  
You Jie Ma
Keyword(s):  
Power System ◽  
Reactive Power ◽  
New Technology ◽  
Dynamic Performance ◽  
Reactive Power Compensation ◽  
It Use ◽  
Flexible Ac Transmission ◽  
Compensation Device ◽  
The Stability ◽  
Ac Transmission

Flexible AC transmission technology (FACTS) is a new technology developed in recent years. It use power electronic technology and modern control technology to achieve fast control for AC transmission system parameter and structure [, to achieve the rational allocation of transmission power, reduce the power loss and the cost of power generation, greatly improve the stability and reliability of the system. STATCOM is based on the principle of reactive power compensation, using full-controlled switching devices to compose self-commutated inventer, complemented by small-capacity storage elements constitute reactive power compensation device. Its role in the power system is the compensation of reactive power, maintain the voltage of the connection point, improve system voltage stability, and improve the steady performance and dynamic performance of the system.

L-Index Modulated Voltage Source Converter

2008 ◽  
Vol 9 (5) ◽  
Author(s):  
Damian O Dike ◽  
Satish M Mahajan
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Flexible Ac Transmission ◽  
Self Tuning ◽  
Modulation Signal ◽  
Status Indicator ◽  
Ac Transmission

A strategy is presented for the self-tuning of a voltage source converter (VSC) based Flexible AC Transmission Systems (FACTS) according to the prevailing system condition. L-index, which is a power system voltage stability status indicator, and its associated parameters are used to automatically regulate the modulation signal of the VSC. This will lead to a proportionate adjusting of the magnitude of the current injected into, or absorbed from, the interconnected load bus by the FACTS device. This regulating scheme will enhance seamless and optimal reactive power compensation by utilizing the dynamic operational nature of present day distressed power system networks. Results obtained using this method when applied to selected load buses of the IEEE 14 bus system under varying practical scenarios showed its capability to appropriately control FACTS devices operation to accommodate system changing conditions. It is hoped that the outcome of this work will provide efficient tools for the determination of power system status, ensure optimal utilization of the dynamic reactive power compensation devices and reduce system outages.

The Application of the UPFC in Power System

2013 ◽  
Vol 457-458 ◽  
pp. 1371-1376
Author(s):  
Xin Hua Xiong ◽  
Zun Nan Min ◽  
Ting Jian Zhong
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Transmission System ◽  
Characteristic Functions ◽  
Electricity Transmission ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
The Stability ◽  
Ac Transmission ◽  
Compensation Function

UPFC is one of the flexible ac transmission system (FACTS) compensation devices, it has a comprehensive compensation function, UPFC has the characteristic functions as follows: fast anddynamical adjusting the parameters of electricity transmission system, such as voltage, impedance, phase angle, active power and reactive power, expanding thecapacity of electricity transmission, improving the stability of power system and optimizing the operation of power system.So it is a perfect fashion for active and reactive power controller, and also it has the function of regulating voltage.

scholarly journals Selection the optimum place of FACTS devices using fuzzy control system

2020 ◽  
Vol 11 (4) ◽  
pp. 1805
Author(s):  
Jawad Hameed ◽  
Hameed Ali Mohammed ◽  
Amer T. Saeed
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Flow Index ◽  
Voltage Profile ◽  
Flexible Ac Transmission ◽  
Optimum Placement ◽  
Facts Controllers ◽  
Remedial Actions ◽  
The Stability ◽  
Ac Transmission

In this paper, the voltage stability of the power system is studied during fault conditions. Enhancement of the system’s stability will be achieved by utilizing Flexible AC transmission systems (FACTS) controllers at the best place in the system. The optimum placement of (FACTS) controllers occurred on the most affected bus by the fault in the system (weakest bus). Two approaches have been used in this study to effectively obtain the best location of the (FACTS) controllers in the system. The first method is based on computing the deviation which occurs in the active power and reactive power due to the fault at each load bus at a time. Whereas the second method is performed through exploiting a MATLAB fuzzy set technique utilizing two indices: Line Flow Index (LFI) and Voltage Profile Index (VPI) during fault and steady-state conditions. The results show that both of these indices resulted in the same bus as the best location. Remedial actions in the attempt at improving in the stability of the power system are discussed taking the advantage of using (FACTS) compensation (SVC) and (STATCOM) at the most vulnerable system buses. In this work, MATLAB program with an IEEE 24 bus system is examined.

scholarly journals Modelling, Simulation and Fuzzy Self-Tuning Control of D-STATCOM in a Single Machine Infinite Bus Power System

2019 ◽  
Vol 12 (1) ◽  
pp. 5-11
Author(s):  
Chaib Habib ◽  
Allaoui Tayeb ◽  
Brahami Mustapha ◽  
Mouloud Denai
Keyword(s):  
Power System ◽  
Single Machine ◽  
Dynamic Performance ◽  
System Stability ◽  
Flexible Ac Transmission ◽  
Clearing Time ◽  
Self Tuning ◽  
Single Machine Infinite Bus ◽  
Ac Transmission ◽  
Modelling Simulation

Background: In recent years, demand for electricity has increased considerably, while the expansion of generation and transmission has been very slow due to limited investment in resources and environmental restrictions. Methods: As a result, the power system becomes vulnerable to disturbances and instability. FACTS (Flexible AC Transmission Systems) technology has now been accepted as a potential solution to this problem. This paper deals with the modelling, simulation and fuzzy self-tuning control of a DSTATCOM to enhance the stability and improve the critical fault clearing time (CCT) in a single machine infinite bus (SMIB). A detailed modelling of the D-STATCOM and comprehensive derivation of the fuzzy logic self-tuning control is presented. Results: The dynamic performance of the power system with the proposed control scheme is validated through in a simulation study carried out under Matlab/Simulink and SimPowerSystems toolbox. Conclusion: The results demonstrate a significant enhancement of the power system stability under the simulated fault conditions considered.

Power Electronic Technology Application in Power System Reactive Power Compensation Study

2014 ◽  
Vol 971-973 ◽  
pp. 1113-1116
Author(s):  
Yang Jia ◽  
Jin Chao Liu
Keyword(s):  
Power System ◽  
Reactive Power ◽  
New Technology ◽  
Reactive Power Compensation ◽  
Current Situation ◽  
Power Electronic ◽  
Electronic Technology ◽  
Technology Application ◽  
Reactive Compensation ◽  
Power Electronic Technology

This paper introduces the reactive power compensation technology in the development of power system. From the new technology of reactive power compensation, controller, capacitor connection mode and switching on-off switch to briefly describes the current situation of the development of reactive compensation technology.

Study of a Multi Objective Reactive Power Compensation Device Considering Fault Current Limiting

2013 ◽  
Vol 397-400 ◽  
pp. 1868-1872
Author(s):  
Hong Mei Wu ◽  
Wen Ting Hui
Keyword(s):  
Power System ◽  
Power Quality ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Mode Switching ◽  
Necessary Condition ◽  
Fault Current ◽  
Multi Objective ◽  
Current Limiting ◽  
Compensation Device

With the increasing demands of power quality, high-quality power supply has become a necessary condition of modern social life. Power quality problems include voltage sag/swell, voltage unbalance and harmonics. To solve the above problem, a multi objective reactive power compensation device considering fault current limiting is designed, which can provide a certain degree of reactive power compensation to solve multi-objective system powered composite power quality problems during the normal working of the power system, and be able to quickly to limit the short-circuit current mode switching when power system under fault conditions. Finally, on the basis of theoretical analysis, experiments and simulations confirmed the correctness and effectiveness of the control strategy.

scholarly journals STATCOM controllers based on fuzzy PI approach

2020 ◽  
Vol 18 (3) ◽  
pp. 1138
Author(s):  
Tamer Shehata ◽  
Mohamed S Abdul moteleb ◽  
Essam Mohamed Abou El-Zahab
Keyword(s):  
Power System ◽  
Electricity Consumption ◽  
Static Synchronous Compensator ◽  
Flexible Ac Transmission ◽  
Controlling System ◽  
Wide Range ◽  
Facts Controllers ◽  
The Stability ◽  
Ac Transmission ◽  
Transient And Steady State

<span>The electricity companies enforced some legislation on the electricity consumption contracts because the electricity network cannot bear the increasing demands of consumers. Therefore, a new controlling system is required to improve the frequent variations of the power system operating point (OP). Consequently, the flexible AC transmission systems (FACTS) controllers should be able to integrate with recent OP. Coordination of FACTS controller is more sophisticated due to various OP and uncertainties parametric in cooperation with the non linearity of power system (PS). Static Synchronous Compensator (STATCOM) plays very important role like the stability support of large and small transient-disturbance in PS. Therefore, the aim of this research is presents fuzzy logic (FL) with the PI controller (a novel controller) its ability to improve the performance of the power system along with the capability of switch irregular and rough actual world data. This new controlling system may be suitable for a wide range of applications especially the models which deal with huge and complicated data analysis. This new controller system carries out the adjustments of the voltage on DC capacitor under transient and steady-state conditions.</span>

Genetic Algorithm and Fuzzy Logic Based Optimal Location of Facts Device in a Power System Network

2006 ◽  
Vol 5 (2) ◽  
Author(s):  
Baskaran Jeevarathinam
Keyword(s):  
Genetic Algorithm ◽  
Fuzzy Logic ◽  
Power System ◽  
Optimization Technique ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Facts Controllers ◽  
The Stability ◽  
Ac Transmission ◽  
The Cost

The flexible AC transmission system (FACTS) in a power system improves the stability, reduces the losses, reduces the cost of generation and also improves the loadability of the system. In the proposed work, a non-traditional optimization technique, a Genetic Algorithm (GA) is conjunction with Fuzzy logic (FL) is used to optimize the various process parameters involved in introduction of FACTS devices in a power system. The various parameters taken into consideration were the location of the device, their type, and their rated value of the devices. The simulation was performed on a 30-bus power system with various types of FACTS controllers, modeled for steady state studies. The optimization results are compared to the solution given by another search method. This comparison confirms the efficiency of the proposed method which makes it promising to solve combinorial problem of FACTS device location in a power system network.

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