Prediction of operating conditions of the power system considering reactive power limits of generators and dynamic voltage stability margin by using neural network

Abstract

In power system, dynamic voltage stability margin corresponding with hopf bifurcation (HB) and reactive power limit of generators, As the two basic concepts in power system operation are defined in terms of voltage stability. Occurrence of HB, leads to oscillatory problem with constant or incremental amplitude in power system. Moreover, occurrence reactive power limit of generators, have a significant effect on power system stability and therefore reduce voltage stability margin or some times leads to voltage collapse occurrence. Therefore, knowledge of relation between operational point of power system and defined margins is very important for network operators to provide corrective and preventive strategies. Accordingly, the use of forecasting tools for the determination and prediction of the operating condition of the power system based on the defined margins is essential. In this paper, to prediction of operating condition of power system, a new classification based on the defined limits is proposed. The proposed algorithm is examined on the IEEE 39 and 68 buses test systems.

Keywords

• hopf bifurcation
• limit induced dynamic bifurcation (lidb)
• generator reactive power limit
• neural network