抄録
Power systems have become larger and more complex because of the increase of the electric power demand, and the analysis of power systems requires heavier computation than before. On the other hand, the social dependence on electric power is increasing, and thus the influence of outages in power systems is becoming more crucial. Therefore on-line preventive control is more important than ever. In this paper, we propose a generation rescheduling method for transient stability preventive control. First we check all contingencies in the decreasing order of their severities by sorting them in the increasing order of their critical clearing times (CCTs) computed by the dynamic extended equal-area criterion. Second we select several contingencies among them as objects of consideration, and compute generation rescheduling amounts using rotor angles of some machines at an appropriate time and the linear relationship between CCTs and outputs of the most critical machine. To investigate the validity of the proposed method, a demonstrative example is shown using the IEEJ EAST 10-machine system.
