A Static Voltage Stability Index base on the Network Admittance Matrix

摘要

A static voltage stability index base on the network admittance matrix is proposed in this paper, in order to measure static voltage stability at each bus. Compared with the existing analysis indexes, this index has the advantages of fast calculation, wide applicability and high accuracy. In this paper, the performance of the IEEE-39 system is simulated and analyzed, and the static voltage stability of Beijing power grid is studied by using the index. The results show that the index can well reflect the bus voltage stability under various operating conditions, and can be used to determine the system's weak voltage area by comparing the index values of each bus.