Transient Stability Monitoring and Preventive Control based on CCT Distribution Factor

Abstract

This paper proposes a monitoring and control method for transient stability (TS). First, it is clarified that there may exist various critical patterns of uncertain power flows causing instability due to photovoltaic generations. Then, the use of critical clearing time (CCT) is suggested as a TS index, which can be computed by conventional TS analysis tools. A distribution factor (DF) for controlling CCT is investigated, referred to as CCT-DF in this paper. Then, three optimization problems using CCT-DF are formulated based on bilevel optimization to obtain reliable operation planning. The combined use of the optimizations guarantees the power system robust security under uncertainties. K E Y W O R D Scritical clearing time, photovoltaics, transient stability, uncertainty 8

A novel approach for transient stability using interval arithmetic and optimization methods

“…A research effort has already been made to tackle the problem of stability of uncertain power systems, by using Fuzzy‐based control, 6 selecting the critical parameters in the stability analysis to measure the level of uncertainty in the system, 7 robust control based on the change critical clearing time due to a small variation in the output active power, 8 or even assessing the stability using the maximum angle difference between two machines in the power system in a probabilistic scenario 9 . In this article, we differ from these articles as we developed a formulation that can include all possible combination of uncertainties present in a given power system and assess the transient stability in a feasible time.…”