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摘要现今，利用分布式能源的分布式发电方式引起了人们的关注，但是分布式发电的不稳定性会对配电网造成冲击，所以为充分利用分布式发电的优点，微电网的概念便应运而生。
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论文首先介绍了微电网的基本知识。其次从接口逆变器控制层面介绍了常用的三种控制方法：恒压恒频（V/f）控制、下垂（Droop）控制和定功率（PQ)控制，并运用SIMULINK软件搭建这三种模型，进行仿真，结果显示三种控制方法均能利用其下垂特性曲线控制微电网的稳定运行。最后从管理层面的控制策略上，对采用对等控制、主从控制及两者结合起来的混合控制微电网进行了仿真分析，在运转模式切换、公共负荷切换、微电源切换等情况下，各个控制方式均能满足自身特性，互相配合稳定微电网运行，混合控制更是结合了两种控制方式的优点，使得微电网运行更灵活稳定。28413
关键词 微电网 V/f控制 Droop控制 PQ控制 对等控制 主从控制 混合控制
毕业论文设计说明书外文摘要
Title Study on Control Strategy of Microgrid
Abstract
Nowadays, distributed generation that uses distributed energy attracted attention.But the instability of the generation would be the impact of distributed network .In order to take full advantage of distributed generation ,the concept of microgrid comes into being.
Firstly,,this paper introduces some basic concepts. Secondly, from the interface to the inverter control level,it describes three common control methods: constant voltage and constant frequency ( V/f )control , Droop control and constant power ( PQ )control .Three models were built with the use of SIMULINK software to evaluated their feasibility.The results showed that three control methods can take advantage of its droop characteristic curve to control the stable operation of microgrid. Finally, from the interface to the management level, peer to peer control strategy、Master-slave Control Strategy and mixed control combining the peer and master-slave control strategy was used in the microgrid . In the operation of mode switching, public load switching , micro-power switching, etc., various control methods can meet its own characteristics and controle microgrid to operate in a stable state. Hybrid control is a combination of the advantages of the two control modes, making the micro-grid run more flexible and stable.
Keywords Microgrid V/f Control Droop Control PQ Control Peer to Peer Control Strategy Master-slave Control Strategy Mixed Control Strategy
目 次
1 绪论 1
1.1 课题的研究背景和意义 1
1.2 微电网的基本概念 1
1.3 微电网的控制 3
1.4 微电网控制策略的研究现状 4
1.5 论文主要工作 6
2 微电源控制设计理论基础 7
2.1 SPWM控制技术 7
2.2 派克（Park)变换 8
2.3 比例（P)与比例积分（PI)控制 8
2.4 本章小结 10
3 基于微电源个体的控制策略建模与仿真 11
3.1 下垂（Droop)控制 11
3.2 恒压恒频（V/f）控制 17
3.3 定功率（PQ)控制 22
3.4 本章小结 28
4 基于管理层面的控制策略建模与仿真 29
4.1 对等控制 29
4.2 主从控制 35
4.3 混合控制 41
4.4 本章小结 47