分布式发电系统保护
分布式发电系统保护(任务书,开题报告,论文18000字)
摘 要
分布式发电作为一种新兴的发电技术被大家所熟知,这种技术在近几年得到了快速的发展以其高效环保的特点。不过,分布式发电电源(Distributed Generation,DG)并网以后,配电网的结构从单电源结构成为了多电源结构,对配电网的控制与运行产生了很多不是很有利的影响,会使配电网继电保护装置出现一系列问题,比如误动、拒动、灵敏度降低等,因此研究分布式电源接入配电网后对配电网带来的影响及研究对应的办法就变得十分重要了,对于分布式电源的发展和推广有着极其重要的意义。
本文简单介绍了课题的背景、发展现状和研究目标,并从分布式发电系统的容量、类型、位置等因素出发,对分布式电源并网可能出现的结果进行分析,通过PSCAD仿真软件建立模型进行仿真,验证了定性分析的结果。提出新的对原有配电网保护改进方法,主要手段有自适应速断保护、加装方向元件等。
关键词:分布式发电技术 继电保护原理 配电网保护 PSCAD仿真
Distributed power system protection
Abstract
Distributed generation is a new generation technology, this technology is characterized by its high efficiency and environmental protection has been rapid development in recent years. However, distributed generation power (Distributed Generation, DG) connected to distribution network, the traditional simple single source radial network into complex multi-source network, making the original distribution network power feeder protection appeared reduced sensitivity, tripping, misoperation and other issues, so to the control and operation of distribution network has brought many factors, so the influence into the research of distributed generation to the distribution network brings and puts forward the corresponding countermeasures is very important, is of great significance for the development and application of distributed power supply.
This paper briefly introduces the background, development status and research objective, and starting from the distributed generation system capacity, type, location and other factors, the possible influence on the feeder protection in distribution network are analyzed, through the PSCAD simulation software modeling simulation, verified the results of qualitative analysis. A new scheme for the protection of the original distribution network is put forward, mainly rely on adaptive protection principle and the principle of longitudinal differential protection.
Keywords:distributed generation(DG),relay protection,The protection of distribution network,PSCAD simulation
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目 录
摘要 I
Abstract II
第一章 绪论 1
1.1课题背景 1
1.2分布式发电系统保护研究现状 1
1.3本文的主要工作 2
第二章 分布式发电技术 4
2.1分布式发电技术介绍 4
2.2分布式电源的分类 4
2.2.1风力发电 5
2.2.2太阳能光伏发电 6
2.2.3微型燃料电池 7
2.2.4燃料电池 8
2.3分布式储能 9
2.4分布式发电对电能质量的影响 10
第三章 分布式发电电源对配电网保护的影响 13
3.1引言 13
3.1.1分布式电源的类型及容量对配电网保护的影响 14
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3.1.2分布式电源的不同接入点对配电网保护的影响 15
3.1.3分布式电源对配电网自动装置的影响 17
3.2PSCAD/EMTDC仿真 18
3.2.1PSCAD/EMTDC仿真软件介绍 18
3.2.2仿真系统模型 19
3.2.3仿真验证 19
3.3仿真结论 24
第四章 对配电网改进后的方案 26
4.1配电网现有保护配置的介绍 26
4.1.1电流速断保护 27
4.1.2限时电流速断保护 27
4.1.3定时限过电流保护 28
4.2对现有馈线保护的改进方案 28
结 语 30
参考文献 31
致 谢 32 [版权所有:http://DOC163.com]