The Influences And Analysis Of TCSC On Protective Relayings For Transmission Line

Thyristor Controlled Series Compensation(TCSC) is an imporant member of the Flexible AC Transmission System(FACTS)'s family. It has many functions, such as tidal current controlling, damping power oscillation, improvement of transient state and suppressing subsynchronous resonance(SSR),so it's potencial is very great in electrical power system and it is primarily in the application of FACTS. The problems such as harmonic and sequence component will be produced when TCSC is operated in power system, which effect the tradition theroy and technology of protection. Therefore, it is necessary to study the influences of TCSC and review the adaptation of TCSC on the existing relay protection.At first, the article researched the influences of Fixed Series Compensation for transmission line and analyzed characters of harmonic wave and the dynamic resistance of basic frequency of TCSC when the fault occurred. Then, simulated by MATLAB, we verify the influence on steady state and transient state of system. At last, we researched the influences of TCSC on protection for transmission line.