特高压电网无功电压控制策略迭代求解方法研究

Research on iterative solution method of reactive power voltagecontrol strategy for UHV power grid

传统的特高压电网无功电压调节多从抑制电压越限角度出发,缺乏对多方面信息综合考虑。文中提出了一种基于改进层次分析法的特高压电网无功电压优化控制方法,构建了特高压变电站电压安全、无功交换、电网损耗等三维度量化评价指标,综合考虑3个方面的优化目标,应用层次分析法计算得到特高压变电站无功电压调节需求综合权重,确定优化方向,通过迭代求解,得到电网全局优化策略。基于华北电网实际数据,仿真验证了该方法的有效性和合理性。

The reactive voltage regulation of traditional UHV power grid mostly starts from the point of suppressing voltage overshoot,which lacks comprehensive consideration of various information.An optimal reactive voltage control method for UHV power grid based on improved analytic hierarchy process(AHP)is proposed in this paper,in which three dimensional quantitative evaluation indices such as voltage safety,reactive power exchange and the power grid loss in UHV substations are constructed.Considering the optimization objectives from three aspects comprehensively,the comprehensive weight of reactive voltage regulation requirements of UHV substations is calculated through using analytic hierarchy process(AHP),and the optimization direction is determined.Through iterative solution,the global optimization strategy of power grid is obtained.Based on the actual data of North China Power Grid,the simulation results show the effectiveness and rationality of the proposed method.