MATLAB有源配电网继电保护研究
毕业论文关键词 分布式电源 配电网 继电保护 MATLAB 仿真
Title Analysis of relay protection of distributed power distribution network
Abstract
Distributed power distribution network is a distribution network with some distributed
generations.Distributed generation technology is predicted to play an increasing role in power
system of the near future in the light of its character of high efficiency, environmental. However,
with the interconnection of distributed generations,the traditional simple single-source
radial -network to complicated multi- source loop-network, bringing traditional feeder protection
new problems in distribution network,such as sensitivity decrease and malfunction, which
deeply affects system operating and controlling. Therefore it is necessary to analyze the
influence of the DG to the distribution network protection and propose its countermeasure,
which is very useful to the development and practicality, for the distributed generation technology.
This paper explains the back ground, the research progresses and research aims, discusses that
different capacity type and location of the DG source have different impacts on the current
flowing through the feeder protection in distributed power distribution network. Also, the
MATLAB simulation of the model confirms that the results of qualitative analysis are true. In
addition, improvement schemes are proposed in the light of the existing distribution protection,
mainly including installing the direction element, modifying the setting value.
Keywords distributed generation distribution network relay protection MATLAB simulation
目 次
1 引言 . 1
1.1 课题研究的背景和依据. 1
1.2 分布式电源对保护的影响和及采取措施的研究现状 . 2
1.3 论文主要工作. 2
2 分布式电源技术 4
2.1 分布式发电的概念 4
2.2 分布式电源的分类 4
2.2.1 燃料电池 . 4
2.2.2 微型燃气轮机 5
2.2.3 风力发电技术 5
2.2.4 太阳能光伏电池 . 5
3 配电网保护 . 7
3.2.1 瞬时电流速断保护定值整定以及灵敏性校验 . 7
3.3 限时电流速断保护 8
3.4 定时限过电流保护 9
3.4.1 定时限过电流定值整定以及灵敏性校验 9
4 分布式电源对网络中的保护的影响.10
4.1 分布式电源的接入对配电网故障电流的影响 10
4.1.1 分布式电源的类型不同对故障电流的影响 .10