scholarly journals Coordination of Series and Shunt Flexible AC Transmission System Devices Based Voltage Source Converter for Improving Power System Stability

2011 ◽  
Vol 8 (5) ◽  
pp. 495-498 ◽  
Author(s):  
Prechanon Kumkratug
Keyword(s):  
Power System ◽  
Power System Stability ◽  
Transmission System ◽  
System Stability ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Ac Transmission

Investigation of Modified Generalized Interline Power Flow Controller (GIPFC) and Performance Analysis

2014 ◽  
Vol 622 ◽  
pp. 111-120
Author(s):  
Ananthavel Saraswathi ◽  
S. Sutha
Keyword(s):  
Power System ◽  
Power Flow ◽  
Test System ◽  
Transmission System ◽  
System Stability ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller

Nowadays in the restructured scenario, the main challenging objective of the modern power system is to avoid blackouts and provide uninterrupted quality power supply with dynamic response during emergency to improve power system security and stability. In this sense the convertible static compensator (CSC) that is the Generalized Inter line power flow controller (GIPFC), can control and optimize power flow in multi-line transmission system instead of controlling single line like its forerunner FACTS (Flexible AC Transmission System) controller. By adding a STATCOM (Static synchronous Shunt Converter) at the front end of the test power system and connecting to the common DC link of the IPFC, it is possible to bring the power factor to higher level and harmonics to the lower level and this arrangement is popularly known as Generalized Inter line power flow controller (GIPFC). In this paper a new concept of GIPFC based on incorporating a voltage source converter with zero sequence injection SPWM technique is presented for reinforcement of system stability margin. A detailed circuit model of modified GIPFC is developed and its performance is validated for a standard test system. Simulation is done using MATLAB Simulink.Index Terms—Convertible static controller, Flexible AC Transmission System (FACTS), Generalized Interline Power Flow Controller (GIPFC),STATCOM, SSSC, Reactive power compensation.

Congestion management in deregulated power system using hybrid cat-firefly algorithm with TCSC and SVC FACTS devices

2016 ◽  
Vol 35 (5) ◽  
pp. 1524-1537 ◽  
Author(s):  
Naraina Avudayappan ◽  
S.N. Deepa
Keyword(s):  
Power System ◽  
Congestion Management ◽  
Power Line ◽  
Transmission System ◽  
Optimal Placement ◽  
Content Type ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Facts Devices ◽  
Ac Transmission

Purpose The loading and power variations in the power system, especially for the peak hours have abundant concussion on the loading patterns of the open access transmission system. During such unconditional state of loading the transmission line parameters and the line voltages show a substandard profile, which depicts exaction of congestion management of the power line in such events. The purpose of this paper is to present an uncomplicated and economical model for congestion management using flexible AC transmission system (FACTS) devices. Design/methodology/approach The approach desires a two-step procedure, first by optimal placement of thyristor controlled series capacitor (TCSC) and static VAR compensator (SVC) as FACTS devices in the network; second tuning the control parameters to their optimized values. The optimal location and tuning of TCSC and SVC represents a hectic optimization problem, due to its multi-objective and constrained nature. Hence, a reassuring heuristic optimization algorithm inspired by behavior of cat and firefly is employed to find the optimal placement and tuning of TCSC and SVC. Findings The effectiveness of the proposed model is tested through simulation on standard IEEE 14-bus system. The proposed approach proves to be better than the earlier existing approaches in the literature. Research limitations/implications With the completed simulation and results, it is proved that the proposed scheme has reduced the congestion in line, thereby increasing the voltage stability along with improved loading capability for the congested lines. Practical implications The usefulness of the proposed scheme is justified with the computed results, giving convenience for implementation to any practical transmission network. Originality/value This paper fulfills an identified need to study exaction of congestion management of the power line.

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.

APPLICATION OF GENETIC ALGORITHM FOR PSS AND FACTS-BASED CONTROLLER DESIGN

2008 ◽  
Vol 05 (04) ◽  
pp. 607-620 ◽  
Author(s):  
SIDHARTHA PANDA ◽  
NARAYANA PRASAD PADHY
Keyword(s):  
Genetic Algorithm ◽  
Power System ◽  
Controller Design ◽  
Optimization Technique ◽  
System Stability ◽  
Nonlinear Simulation ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
System Stabilizer ◽  
Ac Transmission

This paper investigates the application of genetic algorithm (GA) for the design of a power system stabilizer (PSS) and a flexible ac transmission system (FACTS)–based controller to enhance power system stability. The design problem of the proposed controllers is formulated as an optimization problem and the GA optimization technique is employed to search for optimal controller parameters. The proposed controllers are tested on a weakly connected power system under various disturbances and loading conditions, and compared with a conventional PSS (CPSS). The eigenvalue analysis and nonlinear simulation results show the effectiveness and robustness of the proposed controllers.

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