Abstract
Problem statement: Power system oscillations affect system stability and may lead to failure if not properly controlled. Approach: A Takagi-Sugeno Fuzzy Gains Scheduled Proportional and Integral (FGPI) controller was proposed for a Thyristor Controlled Series Capacitor (TCSC)-based stabilizer to enhance the power system stability. Linguistic rules and fuzzy inference mechanism are utilized to tune the controller parameters on-line in different operating states. The proposed controller was applied to a single machine infinite bus system represented by the Phillips-Heffron generator model. Simulation studies have been carried out using MATLAB Fuzzy Logic toolbox. Simulated Annealing-based Power System Stabilizer (SAPSS) and Simulated Annealing-based TCSC Stabilizer (SACSC) approaches were also simulated in this study and their results were compared with proposed controller. Results: The simulation results demonstrated that the proposed control scheme performs well and strongly control the power system under different loading conditions, disturbances and system parameter variations. Conclusion: The proposed controller is robust and more suitable for damping of low frequency oscillation and more effective in improving dynamic stability and voltage profile than the two other approaches.
Highlights
A strong acting Automatic Voltage Regulator (AVR) may avert a loss of synchronism after a fault take place and is cleared in perceptible manner
In the process of exploring effective tools to find solution to many power system problems, this study introduces a new Fuzzy Gain Schedule Proportional and Integral (FGPI) controller for control of Thyristor-Controlled Series Capacitor (TCSC) device in Single Machine Infinite Bus (SMIB) system
A new Takagi-Sugeno fuzzy gains scheduled proportional and integral controller was proposed for the Thyristor-Controlled Series Capacitor (TCSC) to improve the performance of the power system
Summary
A strong acting Automatic Voltage Regulator (AVR) may avert a loss of synchronism after a fault take place and is cleared in perceptible manner. These oscillations in a power system restrict the operating capability of power transmission; jeopardize system security and reduce the operating efficiency of the power system With these conditions, researchers were continually tasked to find simple, effective and economical strategy of attaining stabilization of the power system which is considered of highest priority. Flexible Alternating Current Transmission Systems (FACTS) devices were introduced in the late 1980 These devices operate at fast speed so they can be used to control power system in a smooth, continuous state with better system stability and damping of the low-frequency oscillations (Khan et al, 2004; Gerbex et al, 2001; Paserba, 2004). Demonstrate ability of the proposed approach in These includes conventional control techniques based damping of low-frequency oscillations over a wide classical control theory and linear optimal control. Considering these limitations, it is difficult to effectively solve the significant power system control
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