Improvement Of On-line Static Security Analysis

With the continuous expansion of the power system and the opening of the power market,the scale of trade connection will be continually expanded,so, operation of the electric power system demands a high effective electric power system for the static state safety analysis software,which can help the network nip in the bud by analysing operation style of those electrified netting and security level, so the power system operator can change and control the power system in time. The paper aims at the problem of the on-line static security analysis. Many methods are put forward or improved, which including the power grid connection analysis's method based on Branch Simulation, the practical improvements upon convergence of load flow calculation, security monitoring by the Security Region Method, the improvement methods on security correction conclude Network Reconfiguration based on Load Balancing and power reallocation based on Equal and Opposite Adjustment. These functions are verified by the practical calculation examples based on Lanzhou and Erdos local distribution network.