Transmission System Reliability Evaluation by Incorporating STATCOM in the System Network

As load demand is increasing, the existing power system network has to maintain its reliability. So to make system more reliable, FACTS devices are most commonly used in the system network. Here, Static Synchronous Compensator (STATCOM) load flow modelling is discussed to evaluate the total available capacity with each possible transmission line switching to determine the reliability condition of system network. Capacity outage probability is used to estimate the reliability indices with respect to line switching and switching rate. Individual and cumulative probability are evaluated according to available and unavailable units forced outage rate (FOR). Reliability indices EDNS and LOLP are compared with incorporation of STATCOM with respect to base case. Voltage profile is major concern in power system network. STATCOM is more preferable FACTS device used in the system network buses for improving the voltage profile and making the system more secure. The 24 bus IEEE Reliability Test System (IEEE-RTS-1979) is simulate for evaluation and contrast of the reliability and power flow parameter. Load flow with STATCOM gives better results in terms of improved voltage profile and reduction in loss.