配电网重构模型及其在重庆某城区配电网中的应用

发布时间：2018-11-15 16:47

【摘要】：配电网的重构是电力系统在正常工作条件下优化网络拓扑结构的一种基础方法。调度人员按照现场的实际运行情况通过对开关的操作实现对配电网结构的调整,从而达到一方面可以降低系统有功功率损耗,提升配电网系统的经济性能;另一方面,可以实现消除过载、均衡负荷以及提升电网可靠性等目标。在以减少网络有功功率损耗为目标的配电网重构中,本文主要将二进制PSO(粒子群)优化算法用到网络拓扑结构中。在研究二进制PSO算法的收敛性过程中,本文通过对粒子群算法的初始种群大小、惯性因子取值等方法来判断配电网络辐射状等方法来达到加速算法收敛性的目的。通过对重庆某城区配电网模型的算例分析,重构后的网络损耗为2.5MW,比重构前的损耗降低了16.6%,因此本文的模型具有可行性。在以提高可靠性为目标的配电网重构中,本文主要将改进的开关交换算法用到重构中,选取系统平均停电持续时间SAIDI和系统平均停电次数SAIFI的综合权值作为断开常闭分段开关的选取原则。通过对重庆某城区配电网模型的算例分析,SAIFI降低了7.1%,SAIDI降低了6.42%,F值降低了6.7%,ASAI提高了0.7%。说明重构后的系统整体的可靠性具有显著的提高,以可靠性为目标的配电网络重构模型是正确的。
[Abstract]:The reconfiguration of distribution network is a basic method to optimize the network topology under normal working conditions. The dispatcher adjusts the distribution network structure according to the actual operation of the field through the operation of the switch so as to reduce the active power loss of the system and improve the economic performance of the distribution network system on the one hand; On the other hand, the goals of eliminating overload, balancing load and improving the reliability of power system can be achieved. In this paper, binary PSO (particle swarm optimization) algorithm is applied to the network topology in the reconfiguration of distribution network, which aims to reduce the loss of active power in the network. In the process of studying the convergence of binary PSO algorithm, this paper uses the methods of initial population size and inertia factor to judge the radiance of distribution network to accelerate the convergence of the algorithm. Through the example analysis of a distribution network model in Chongqing, the network loss after reconfiguration is 2.5 MW, which is 16.6% lower than that before reconfiguration, so the model in this paper is feasible. In the reconfiguration of distribution network aimed at improving reliability, the improved switching algorithm is mainly used in the reconfiguration. The combined weight values of SAIDI and SAIFI are selected as the selection principle of breaking the normally closed segmented switch, which is based on the system average blackout duration (SAIDI) and the average power outage number (SAIFI) of the system. Based on the analysis of the distribution network model in a certain urban area of Chongqing, the SAIFI decreases 7.1and SAIDI decreases 6.42F and the value of 6.7ASAI increases 0.7. It is shown that the reliability of the reconfigurable system is improved significantly, and the reconfiguration model of distribution network aiming at reliability is correct.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM727.2

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