文档介绍：微电源故障输出特性和微电网保护方案初探
摘要
分布式发电不仅具有环保、效率高、安装地因地制宜等优点,而且可节省长距离输电线路的投资成本和损耗,保障在大电网发生意外停电时,能够提供基本的能源供应。然而,分布式发电的随机性、小容量、小惯性、低过载能力等缺点,以及分布式发电接入对大电网的影响等诸多因素都制约着分布式发电技术的推广和实用,微电网技术的出现就是为了解决这些难题。
本文首先对逆变型分布式电源的工作原理以及控制策略进行了理论分析,并在此基础上分别详细分析了在PQ控制以及VF控制下逆变型分布式电源的故障输出特性,并在Matlab/Simulink仿真环境下进行仿真,验证了控制策略的有效性以及故障输出特性分析的正确性。最后阐述了微电网的配置、保护层次和逻辑,以及基于全局信息的集中式保护方案。
关键词:逆变型分布式电源,故障输出特性,微电网,仿真,保护方案
ABSTRACT
The Distributed Generation(DG)is eco-friendly, high efficiency and has advantage in installation location of localization. Moreover, it can reduce the transmission and distribution line loss, lower the operation cost, guarantee basic energy supply when the power grid power has malfunction. However, there also some disadvantages for the distributed power generation, such as randomness, small capacity, small inertia, low overload ability, the influence of Distributed Generation access to power grid and so factors restrict the application and promotion of distributed power generation emergence of micro-grid technology is to solve these problems.
Firstly ,the works and control strategies of Distributed Generation are analyzed theoretically,And on the basis of this analysis,the output failure characteristics on the PQ power control,V/F control of the inverter Distributed Generation are analyzed in runs a simulated modeling test under the simulation environment of Matlab/Simulink software,verify the effectiveness of the control strategy,and the accuracy of output failure characteristics elaborated the level of protection device and the protection logic of the microgrid,and centralized protection program on the basis of global information.
Key words: Distributed Generator, Output failure characteristics, Microgrid,Simulation, Protection program
目录
摘要 1
ABSTRACT 2
第一章绪论 4
课题的背景和意义 4
国内外微电网的研究现状 5
各国对微电网的定义和研究方向 5
微电网保护的研究现状 6
本文研究主要内容 8
第二章微电网的控制策略及故障特性分析 9
微电网的结构特点 9
微电源的分类及控制原理 11
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