Dynamic performance comparison of different controlled islanding methods

Controlled islanding can be used as an efficient emergency action to prevent blackouts. Steps of controlled islanding methods implementing include graph modelling, objective function establishing, and the splitting solution finding. Researchers now concern about static constraints such as reactive power compensation and restoration capability when solving the objective function, but few papers have analyzed dynamic performance of splitting algorithms comprehensively. This paper investigates detailed dynamic responses with three typical methods: a) Ordered Binary Decision Diagram (OBDD), b) Weak Connection and c) Spectral Clustering islanding. To compare their differences, this paper separates the responses creatively into two phases from the perspective of time. In the first phase, characteristics of oscillations among generators and duration of transient process are taken into consideration. Maximum frequency shift and steady frequency shift in the second phase are compared then. Feasibility of different splitting solutions are also analyzed to compare the three methods. Time domain simulation of IEEE 118 case is carried out with PSS\E.