含分布式电源的配电网无功优化

为提高系统电压稳定性,在传统无功优化目标函数模型的基础上引入电压稳定L指标,将电压稳定L指标与最优潮流结合,建立了考虑网络损耗和系统电压稳定的配电网无功优化模型.在小生境遗传算法的基础上,对遗传算法小生境进行单纯形搜索,消除算法中存在的早熟收敛和开采能力不足的缺点,增强了算法的寻优能力.采用IEEE33节点算例分析表明,该算法优化效果良好,能有效降低有功网损,提高系统电压稳定性。

Distribution network reactive power optimization with distributed generation

In order to enhance system voltage stability, on the basis of traditional reactive power optimization func- tion model, voltage stability L-index is brought in. By combining voltage stability L-index with optimal power flow, the reactive power optimization model considering network loss and system stability is established. On the basis of niche genetic algorithm, the author makes simplex search of genetic algorithm niche, eliminates the disadvantages existing in the algorithm, including premature convergence and incapability of exploitation, and strengthens the ability of optimization. The analysis of IEEE33 node example shows that the algorithm, with great effect of optimization, is able to reduce network loss and to enhance voltage stability.