含分布式电源的配电网自愈控制方法的研究-电气工程专业论文.docxVIP

摘 摘 要 万方数据 万方数据 摘 要 随着全球能源需求的不断增大，用户对电能质量的要求逐渐提高，在资源 环境压力增大和电力市场化进程加快的背景下，智能电网的概念也不断地被提 及，自愈控制作为智能电网最主要的特征之一，相关的研究也越来越受到重视。 自愈控制就是电网正常时自我预防控制，故障时快速隔离、自我恢复，避免大 面积的停电发生。本文研究的重点是在故障时电网的故障定位以及配电网的故 障恢复，旨在实现配电网的不中断供电。 本文首先阐述了自愈的概念，分析现阶段配电网的故障定位和含分布式电 源的配电网故障恢复的现状。然后介绍了常见的分布式电源类型以及分布式电 源的接入对电网的影响。同时还介绍了 Petri 网的基本理论，并在此基础上建立 Petri 网的模型以及推理规则进行故障定位。最后，针对含分布式电源配电网的 故障恢复，提出了遗传模拟退火算法（Genetic Simulated Annealing algorithm）。 在遗传算法和模拟退火算法的理论基础上，结合两种算法的优点，以二进制编 码，根据个体适应度值进行交叉和变异操作，采用模拟退火的算法产生并接受 新个体，以保证种群的多样性，避免陷入局部最优，提高遗传算法的全局寻优 能力；以有功网络损耗最小为目标函数，尽可能多的恢复停电区域；最后采用 IEEE-16 节点系统进行验证，计算结果表明该算法对于故障恢复的有效性。 关键词：自愈控制；分布式电源；故障定位；配电网恢复重构；遗传模拟退火 I AB ABSTRACT ABSTRACT With the increasing of global energy demand and the users’ requirements for power quality improved, under the background of the increasing pressure on resources environment and the rapid development in electricity market, the concept of Smart Grid is constantly being mentioned, as one of the most important features of Smart Grid, related researches on self-healing control are more and more taken seriously. Self-healing control consists of two parts: self-prevention and self-control in normal state; insulate quickly and self-recovery in fault state, to avoid widespread power outage. This thesis studies on the second part: the fault location and failure recovery of distribution network, design to achieve uninterrupted supply of electricity. Firstly, a brief introduction of the concept of self-healing is given in this paper. Then it is analyzed that the current status of fault location in distribution network and failure recovery in distribution systems with distributed generation (DG). In this paper the common models of DG and its effect on distribution network are also described. The basic theory of Petri nets is also introduced, a model of Petri net and rule of inference are established on the theory used to find the point (or the area) of fault. Finally, genetic simulated annealing algorithm is proposed to solve failure re