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The rapid increase in industrial load created the lack of power generation capacity and transmission line instability problems. The consequence of this is decrease in Power Quality (PQ) and produces the voltage sag, voltage swell, flickers, and harmonics. The usage of power electronic devices for power conversion also causes the problem and generates excessive voltage fluctuations in the system. FACTS devices made it possible to reduce the PQ issues. This paper developed the control strategy for series compensation to eliminate voltage sag and harmonic distortion in transmission system with the application of Custom Power Device (CPD) of type Thyristor Controlled Series Capacitor (TCSC). This is power electronics device used to enhance the power transfer capability near thermal limit without affecting the stability. The results obtained through MATLAB/SIMULINK environment when TCSC is inserted in series with the transmission line are shown. By the proposed method, the Total Harmonic Distortion (THD) also kept at lower than 5% as per IEEE-519 standard.

international journal of innovative research in science engineering and technology/international journal of innovative research in science, engineering and technology

Voltage Sag Compensation of Transmission Line System by using Thyristor Controlled Series Capacitor