论文总字数：40097字

摘 要

配电网是电力系统的重要组成部分，它也是电力系统中与我们日常生活关系最密切的部分，配电网运行的可靠性，直接影响着我们的生活生产质量。我国配电网的建设尚未完善，基础设施同发达国家还有较大差距。配电网发生故障时，能否快速做出合理的恢复方案，减少停电时间与范围以减少不必要的经济损失，对于配网理论的改进和完善有着重要意义。随着科技的进步，智能电网提出后，各类智能故障恢复方法层出不穷，都有着自己相比于传统恢复方法所特有的优点，也定会成为关于配电网研究的趋势。

本文建立了一种新的故障恢复算法，并进行了编程实现。其算法结合了遗传算法与风险评估理论，用于解决配电网馈线发生永久故障时，非故障馈线的恢复问题。对于任意网络结构生成开关组合方案并进行潮流计算，利用配电网风险评估理论对计算结果进行评价与比较，然后通过遗传算法对各开关组合方案进行大量的寻优处理，得到最优或较优的恢复方案，旨在保证风险较小的前提下，使配电网的恢复结果达到最小的经济损失。

本文采用VS 2015 编程软件在C 的环境下编写了基于风险评估的主动配电网故障恢复算法。以某双馈九节点网络作为算例对所编写的算法进行了测试与评估。该恢复方案的设计。

关键词：主动配电网 故障恢复 风险评估 遗传算法 智能电网

Research on Fault Recovery Strategy of Active Distribution Network Based on Risk Assessment

Abstract

Distribution network is an important part of power system.The safe operation of distribution network has a direct impact on our lives.The construction of distribution network in our country has not been perfect yet, and there is still a big gap with developed countries.When the distribution network fails, makeing a reasonable recovery plan quickly,reducing the time and scope of power outages to reduce unnecessary economic losses are great significance to the improvement and perfection of the distribution network theory.With the progress of science and technology, after the smart grid is put forward, all kinds of intelligent fault recovery methods emerge in endlessly.They all have their own unique advantages compared to the traditional recovery methods, and will also become a trend in the distribution network research.For example, specific network structures, specific regions and users.These algorithms continue to update and modify the existing intelligent algorithms.

This paper establishes a new fault recovery algorithm and implements the programming.The algorithm combines the genetic algorithm and the risk assessment theory to solve the problem of non-fault feeder recovery when the feeder network has a permanent fault.The switching scheme is generated for any network structure and the power flow is calculated. The calculation results are evaluated and compared by using the theory of distribution network risk assessment.Through the genetic algorithm, a large number of optimization schemes are proposed to obtain the optimal or better recovery scheme. The aim is to ensure the economic loss of the distribution network with the minimum risk.

In this paper, we use the VS 2015 programming software to write an active distribution network fault recovery algorithm based on risk assessment in C environment.The algorithm of the double - fed nine - node network is used as an example to test and evaluate the algorithm. The design of the restoration program.

Key Words: Active Distribution Network; Fault Recovery; Risk Assessment; Genetic Algorithm; Smart Grid

目 录

摘 要 I

Abstract II

第一章 绪 论 1

1.1 研究背景 1

1.2 国内外研究现状 2

1.3 配电网故障恢复研究的目的、意义 3

1.4 本文主要工作 4

第二章 配电网故障恢复的基本研究 6

2.1 配电网及其故障处理的特点 6

2.2 故障恢复基本要求 8

2.3 故障恢复的数学模型 8

2.3.1 故障恢复的目标函数 9

2.3.2 故障恢复的约束条件 10

2.4 配网故障恢复智能算法 12

2.5 本章小结 13

第三章 一种配电网故障恢复智能算法方法 14

3.1 概述 14

3.2 风险评估 14

3.2.1 风险理论 14

3.2.2 风险评估指标 15

3.3 遗传算法 17

3.3.1 遗传算法概述 17

3.3.2 算法流程 18

3.3.3 遗传算法在故障恢复中的应用 23

3.4 一种配网恢复智能算法 24

3.4.1 算法流程 24

3.4.2 操作方式选择 25

3.4.3 控制参数设置 27

3.5 本章小结 27

第四章 恢复算法的程序实现 29

4.1 算例分析 29

4.2 本章小结 32

第五章 总结与展望 33

参考文献 35

致 谢 38

附 录 39

第一章 绪 论

1.1 研究背景

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