Nowaday, reactive compensation of distribution network cannot fulfill the demand and a sound reactive power planning is still absent, causing low voltage and more electric circuit loss, therefor, the status of optimizing reactive power compensation is in serious need of change. To enhance the efficiency of var compensation devices, improve the voltage level and reduce electric circuit loss, this paper carried on research on calculating power flow for radial distribution network using back/forward sweep method and placing reactive compensation devices with proper capacity based on the power flow solutions, and the task have to be repeated many times until the best scheme has been found. The author used Microsoft Visual Basic 6.0 as the development platform to establish the topological model of distribution network, calculate and make out excel report and diagram. The software has been applied in Shaoguan City. The practical tests prove that the development is successful.%关于优化配电网的质量问题,针对目前配电网无功补偿普遍缺乏合理的无功规划,导致运行电压较低及较大的线损的问题,迫切要求改善现有配电网无功优化的现状,为有效地提高现有无功补偿装置的效率,提升配电网运行电压以及降低线损.结合配电网绝大部分线路是放射状的实际情况,以辐射型网络潮流的分层前推回代算法分析计算配电网的潮流,在潮流结果的基础上根据无功精确矩确定无功补偿点及补偿容量,通过重复多次计算得到最优方案.通过vb6.0软件建立电网拓扑模型,结合理论分析,并进行仿真.仿真结果证明,补偿效果较好,软件已在韶关市配电系统中得到试用,并具有良好的实用性,无功优化效果良好.
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