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摘要:随着电网的不断发展,输配电系统中不断引入种类繁琐的电力电子设备,其显著优点是具有快速的反应特性,提高了系统运行的可靠性。各种各样的电力电子设备应用于供配电系统，使供配电系统的快速行和可靠性得到了大幅提高。社会的不断发展要求供电系统为用户提供稳压、稳频、适量无功的高质量电能,为了达到这一目的,很多新型装置投入输配电系统的应用,不可忽视的是,这些电力电子构件的存在也威胁着系统的稳定运行,尤其是会对继电保护的正常工作带来隐患。5449
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利用补偿装置消除瞬时的电压跌落、提高电能质量非常重要。针对供配电系统中各种电压质量问题，比如电压偏差、电压波动、电压跌落等问题，采用一些合理的措施，以提高电能质量。要求针对其中电压跌落问题进行分析，设计动态电压恢复器以解决相关问题，在理论研究的基础上，应用MATLAB中的Simulink进行相应的数字仿真研究。仿真的结果证明动态电压恢复器所采用的检测方法和控制策略的正确，具有较好的补偿特性，能够同时解决电网中多种电能质量的问题。
关键词： 电压跌落;动态电压恢复器;MATLAB仿真
For the influence of the power electronic equipment in the power distribution system research
Abstract: With the continuous development of the grid, kinds of complex power electronic devices continue to introduce power transmission and distribution system, its significant advantage is response quickly, improve the reliability of system operation. A variety of power electronic devices used in power supply and distribution system, the fast line and the reliability of power supply and distribution system is greatly improved. The continuous development of society requires power supply system provides stable, for the user frequency stabilization, amount of high quality electrical energy without power, in order to achieve this purpose, the application of transmission and distribution system, many new device, can not be ignored is, these electronic components power there is also a threat to the stability of the system operation, especially the risks the relay protection work.
The elimination of the instantaneous voltage drop, improve electric energy quality is very important to use compensation device. According to various power quality problems in power supply and distribution system, such as voltage deviation, voltage fluctuations, voltage sag problem, adopt some reasonable measures, to improve the quality of electric energy. By analyzing the voltage sags, the design of dynamic voltage restorer to solve related problems, on the basis of theoretical research, the application of MATLAB Simulink in digital simulation of the corresponding. Simulation results show that detection method and the control strategy of dynamic voltage restorer used correctly, a good compensation characteristics, which can solve a variety of electric power quality problems.
Key words: Voltage sags; Dynamic voltage restorer ;MATLAB simulation
目录
1 电能质量问题的概述 1
1.1 电能质量 1
1.2 电能质量问题分类 1
1.3 电压跌落 2
1.3.1 电压跌落产生的原因 2
1.3.2 电压跌落的危害 3
1.3.3 电压跌落的抑制方式 3
1.4 动态电压恢复器的介绍 4
1.5 MATLAB/SIMULINK简介 4
2 动态电压恢复器的工作原理与结构 6
2.1 动态电压恢复器的基本结构与原理 6
2.2 DVR的工作模式 6
2.3 DVR的电压补偿策略 7
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