超高压电网无功平衡实用计算

介绍了以直流潮流为基础,结合最优无功补偿理论的超高压电网无功平衡计划实用计算方法.该方法根据电网有功日负荷预测值,按照实际的电网拓扑结构和运行方式,首先计算线路和变压器等电网元件的等值电、路参数,生成导纳矩阵,通过直流潮流计算支路有功潮流和无功损耗,然后按照无功分点在线路中点的优化理论,快速优化各节点无功补偿量.算例表明,该实用算法可避免重复迭代和潮流不收敛问题.

Practical calculation for reactive power balance planning of EHV power grid

A practical calculation method for reactive power balance planning of EHV(Extra -High Voltage) power grid based on DC load flow and optimal reactive power compensation theory is proposed,which,according to the actual power system topology and operation mode,calculates the equivalent circuit parameters of transmission lines,transformers and so on based on the forecasted daily load to generate the admittance matrix,and then the active power and reactive power loss of branches with DC load flow method.The reactive power compensation of each node is quickly optimized according to the theory that the reactive power division point is at the middle of transmission line.The case study shows that,the proposed algorithm avoids the repeated iteration and the nonconvergence of load flow.