A Fast Sensitivity Matrix Update Technique for Accurate Contingency Analysis State Computation Technique in Power Systems

정확한 상정사고 분석을 위한 민감도 행렬의 신속한 Update 기법에 관한 연구

This paper presents a fast and accurate contingency analysis in EHV systems for line outages, loss of generation of redispatching and loss-of-load or load management. Unlike other contingencies, line outage requires the modification of the Jacobian of the base case power flow and the calculation of its new inverse, which is substantially different from the original inverse. In this paper, we obtain the inverse of the new Jacobian from the original inverse without repeating the time consuming matrix inversion process. Numerical test results show the significant improvement in the accuracies compared with those obtained using the original inverse.