Reliability modeling of TCR-FC type SVC using Markov process

Static VAr compensator as a reactive power equipment plays a significant role in power system reliability and security. Because in conventional reliability evaluations, reactive power had only been considered as a network constraint in analysis, the effect of SVC on reliability evaluation of the system has not been considered in the existing reliability techniques yet. This paper, at first, analyzes the role of different components of SVC in availability of the system, and proposes a reliability model for a typical SVC. Next, Markov process is employed to analyze the proposed model and to present an equivalent three state model for the SVC. Then, a sensitivity analysis in a practical operating point is carried out to consider the impact of the failure and repair rates of different components on the availability of the system.