Applications of thyristor controlled series compensator in power system: An overview

In recent years, power demand has increased day by day while the expansion of power generation and transmission has been limited due to limited resources and environmental restrictions. Flexible Alternating Current Transmission Systems (FACTS) devices play an important role in improving the power system performance. Flexible AC transmission systems devices have been mainly used for solving various steady states, dynamic and transient control problems of power system. TCSC is an important member of FACTS family. In a power system, TCSC device has high potential in applications because it may improve power system performance including power flow control, transfer capability enhancement of the transmission system, transient stability enhancement and sub-synchronous resonance (SSR) mitigation etc. As other FACTS devices, TCSC is also a costly device. Therefore this is utmost essential to find its optimal size and location in a power system to achieve maximum benefit of this device. This complicated problem of finding optimal location and sizing of TCSC has been solved by researchers in different ways by considering different objectives. This paper presents a brief review of the work carried out by researchers in this field.