과도에너지 함수를 이용하여 연계계통의 총송전용량 평가를 위한 최적화기법 응용

Abstract

This paper presents a method to apply energy margin for assesment of total transfer capability(TTC). In order to calculate energy margin, two values of the transient energy function have to be computed. The first value is transient energy that is the sum of kinetic and potential energy at the end of fault. The second is critical energy that is potential energy at controlling UEP(Unstable Equilibrium Point). It is seen that TTC level is determined by not only bus voltage magnitudes and line thermal limits but also transient stability. TTC assessment is compared by the repeated power flow(RPF) method and optimization method.