计及分布式电源出力特性的配电网无功优化

Reactive Power Optimization of Distribution Network Considering the Output Characteristics of Distributed Power

随着分布式电源在配电网中渗透率的逐渐增加,其出力特性对配电网运行的影响也在逐渐加大。针对含分布式电源的配电网在优化时将分布式电源等效为恒功率模型,没有考虑其输出随节点电压和注入电流变化而变化的特性导致的难以得到实际运行中最优解的问题,提出了计及分布式电源输出特性的配电网无功优化方法。对于遗传算法在求解时易陷入局部最优解的问题,采用了多种群遗传算法进行优化求解,并在IEEE 33节点配电系统上进行验证,结果证明了所提方法的有效性。

As the penetration of distributed power sources in the distribution network increases gradually,the influence of its output characteristics on the operation of the distribution network is also increasing.Distributed power networks with distributed power supply are optimized by equating the distributed power supply to a constant power model,without considering the characteristics of its output varying with node voltage and injection current,which makes it difficult to obtain an optimal solution in operation.To solve this problem,a reactive power optimization method for distribution network is presented,which takes into account the output characteristics of distributed power supply.For the problem that the genetic algorithm is prone to fall into the local optimal solution when solving,a multi-population genetic algorithm is used to optimize the solution,which is verified on the IEEE 33-node distribution system.The results show the effectiveness of the proposed method.