Development of transient stability control system (TSC system) based on on-line stability calculation - Discussion

This paper describes a new transient stability control system named the TSC system developed for application to the trunk power system of Chubu Electric Power Co. (CEPCO). The TSC system prevents wide-area power system blackout by shedding optimal generators when a serious fault occurs. This system has the following features: (1) The TSC system performs detailed stability calculations based on on-line information telemetered from the actual network, and it periodically evaluates the stability of the power system against contingencies with a high degree of accuracy. The system selects the optimum generators to be shed. (2) If a contingency actually occurs, the generators to be shed that were determined in advance are shed about 150 ins after fault occurrence to maintain the stability of the power system. (3) The system can be applied to any power system configuration of CEPCO, such as a loop network, radial network, etc. The TSC system will be put into regular service in June 1995. It will be the world's first real-time stability control system that performs detailed transient stability calculations on a large power system on-line. © 1995 IEEE.