| 引用本文: | 黄本润,夏 立,吴正国,周卫平.线电压补偿型动态电压恢复器的双前馈加反馈控制策略[J].电力自动化设备,2011,31(10): |
| HUANG Benrun,XIA Li,WU Zhengguo,ZHOU Weiping.Double feedforward plus feedback control strategy based on line voltage compensation for dynamic voltage restorer[J].Electric Power Automation Equipment,2011,31(10): |
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| 摘要: |
| 基于线电压补偿的三相动态电压恢复器（DVR），介绍了一种线电压的补偿方法。以单相DVR为例，建立了DVR的数学模型，在此基础上综合分析各种控制策略下的系统传递函数。由分析可知在电网电压和负载电流的影响下，系统始终存在稳态误差。为此提出电网电压加负载电流双前馈和负载电压反馈的复合控制方法，既保持动态响应快速性和系统稳定性，又基本消除电网电压和负载电流对负载电压的影响。仿真和实验验证了理论分析的正确性。 |
| 关键词: 动态电压恢复器 线电压补偿 前馈控制 反馈控制 传递函数 |
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| Double feedforward plus feedback control strategy based on line voltage compensation for dynamic voltage restorer |
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HUANG Benrun, XIA Li, WU Zhengguo, ZHOU Weiping
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College of Electronic and Information Engineering，Naval University of Engineering，Wuhan 430033，China
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| Abstract: |
| A method of line voltage compensation is recommended for three-phase DVR（Dynamic Voltage Restorer）. The mathematic model of single phase DVR is established and the transfer functions are derived for different control strategies. Analysis shows that the system steady error is caused by the influences of grid voltage and load current，and a compound control with double feedforward of grid voltage and load current plus single feedback of load voltage is proposed，which eliminates the influences of grid voltage and load current on load voltage while guarantees the fast dynamic response and system stability. The correctness of theoretical analysis is verified by simulations and tests. |
| Key words: dynamic voltage restorer line voltage compensation feedforward control feedback control transfer functions |
