含DG的电力系统状态估计

含DG的电力系统状态估计(论文11000字)
摘要:分布式发电(Distributed Generation，简称DG)顾名思义就是代指一些发电的功率达到几千瓦至几百兆瓦的小型发电系统。它不仅能够节能减排，促进环保，还能够带动未来电力系统中新能源的应用与发展的优势，使得分布式电源将会在未来的电力系统里起着举足轻重的作用。电力系统的状态分析需要准确的数据，而一般得到的信息多少存在误差，状态估计作为提高数据精度，排除错误信息的一种手段使其极具有研究价值。本篇论文的主要研究内容就是以线路始端的复电流作为状态变量，提出了含有分布式电源的电力系统状态估计算法，其同样适用于弱环网配电系统，并且通过算例验证了该算法的正确性。文章中主要讨论了三种不同类型的DG，加入电力系统之后对配电系统产生了不同程度的影响。
关键词：分布式发电辐射状和弱环状配电系统 状态估计

State estimation of power system with DG
Abstract：Distributed generation (Distributed Generation, referred to as DG) As the name suggests is on behalf of some power generation to reach several kilowatts to hundreds of megawatts of small power generation system.It can promote energy-saving emission reduction and drive the development of new energy advantages, so that distributed generation will have a place in the future power system.State analysis of power systems requires accurate data.Howeverthe amount of information received generally suffers from errors.As a means to improve data accuracy and eliminate error information, state estimation is of great research value.The main research content of this paper is to use the complex current of the line as the state variable, and propose a power system state estimation algorithm with distributed power supply. The same applies to the weak ring network distribution system, and the algorithm is verified by an example.The article mainly discusses three different types of DG, after adding the power system to the power distribution system had different degrees of influence.
Key words:distributed generation Radial and weak annular distribution systemsstate estimation

目 录
1.绪论    1
1.1分布式电源的概念及其特点    1
1.2电力系统状态估计概念    2
1.3国内外发展现状    2
1.4课题设计意义    3
2.电力系统状态估计常用算法    3
2.1基本加权最小二乘状态估计法    3
2.2 Givens正交变换算法��    6
2.3 混合法    6
3.配电系统中的DG类型    7
3.1  PQ 节点    7
3.2 PV节点    8
3.3 PI节点    8
4.状态估计算法    9
4.1弱环状配电系统状态估计计算方法    9
4.2 含有DG 的辐射状和弱环状配电网三相状态估计算法    10
4.2.1状态估计算法具体步骤    10
4.2.2本文采用了Visio绘图软件绘制了整个算法的流程图    11
5.算例分析    13
5.1算例概述以及计算原理    13
5.2 IEEE13 Node Test Feeder算例    15
5.2.1 测试方案A    15
5.2.2 测试方案B    16
5.2.3 测试方案C    16
5.3 IIT micro grid算例    17
5.3.1 测试方案A    17
5.3.2 测试方案B    17
5.3.3 测试方案C    18
6.设计总结与展望    19
6.1设计总结    19
6.2未来工作的展望    19
参考文献    20
致谢    21