山东电网静态电压稳定和无功补偿评估

摘要

Combining the continuation power flow with the Thevenin equivalent, this paper proposes assessment methods of static voltage stability and reactive power compensation for a variety of power flow changing modes. First, get the data of increasing power flow by using continuation power flow to obtain the Thevenin equivalent parameters of every node, and then construct some static voltage stability indexes as well as the estimated amount of the required optimal reactive power compensation based on the Thevenin equivalent parameters. According to the actual forecasting data of Shandong power grid in winter 2010, static voltage stability and reactive power compensation under a variety of operation modes are analyzed in detail. The result can make clear the areas with weak voltage stability and put forward corresponding reactive power compensation strategies, which would be a great reference for Shandong power grid operation and planning.This work is supported by National Natural Science Foundation of China (No. 50377021, No. 50677036 and No. 51007047).%将连续潮流与戴维南等值方法结合,提出了各种潮流变化模式的静态电压稳定和无功补偿评估方法.首先,利用连续潮流计算递增电网潮流数据,然后求得各节点戴维南等值参数,基于戴维南等值参数构建了多种静态电压稳定裕度指标及最优无功补偿预估方法.针对山东电网2010年冬季实际预测数据,对多种运行方式下的静态电压稳定和无功补偿进行详细的分析,确定电压稳定薄弱区域及相应的无功补偿策略,为山东电网运行和规划提供有益参考.