Enhancement of Power System Stability with Optimal TCSC Control and Sub-Synchronous Resonance Mitigation in Series Compensated Transmission Lines

One of the major challenges faced by power system operators today is the control of voltage and reactive power with the objective of maximizing the power transmission capacity of transmission lines. To address this, efforts are made to enhance the transmission capacity by implementing series compensation in transmission lines while simultaneously controlling voltage and reactive power. Thus, the use of series capacitors is widely adopted for the simultaneous control of voltage and reactive power in transmission lines due to economic reasons. The use of series capacitors increases the maximum transfer capacity and improves system stability as well as the voltage profile of transmission lines. However, one of the drawbacks of series capacitors is the occurrence of sub-synchronous resonance (SSR) phenomena in the network. Therefore, series capacitors with Thyristor Controlled Series Compensation (TCSC) are increasingly used in the network due to their advantages over series capacitors, such as minimizing the likelihood of SSR occurrences and providing optimized economic solutions. This paper aims to design an optimal controller for series capacitors with TCSC, which not only controls voltage and power transmission but also minimizes the occurrence of sub-synchronous resonance (SSR) phenomena.

کلیدواژه ها:

Optimal control ، TCSC ، Power system ، Sub-synchronous resonance ، Series compensation ، Transmission lines ، System stability ، Voltage ، Reactive power ، Power network