| 引用本文: | 金 楠,唐厚君,杨存祥,姚 辰.新型动态电压恢复器的拓扑与控制策略[J].电力自动化设备,2011,31(7): |
| JIN Nan,TANG Houjun,YANG Cunxiang,YAO Chen.Topology and control strategy of dynamic voltage restorer[J].Electric Power Automation Equipment,2011,31(7): |
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| 摘要: |
| 为改善电能质量，提出了一种由PWM交流斩波变换器和变压器组成的动态电压恢复器电路拓扑。变压器一次侧通过固态继电器投切组与交流斩波变换器输出端相连，其二次侧与负载串联。当电网电压发生波动时，通过改变交流斩波变换器输出电压以及固态继电器组投切状态，达到调节补偿电压、保持负载电压稳定的目标。新型动态电压恢复器不需使用电池、大容量电容、电感等储能元件，能够有效补偿电网电压波动，具有体积小、成本低的特点。针对所提出拓扑，设计了基于瞬时电压的前馈反馈控制策略，并利用数字信号处理器（TMS320F2812）实现了该算法。实验结果验证了所提出方案的有效性。 |
| 关键词: 交流斩波 动态电压恢复器 电压控制 谐波分析 前馈反馈控制 电路拓扑 变换器 变压器 |
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| Topology and control strategy of dynamic voltage restorer |
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JIN Nan1,2, TANG Houjun1, YANG Cunxiang2, YAO Chen1
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1.Key Laboratory of Control of Power Transmission and Conversion，Ministry of Education， Department of Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China;2.School of Electrical and Information Engineering，Zhengzhou University of Light Industry，Zhengzhou 450002，China
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| Abstract: |
| The topology of dynamic voltage restorer is proposed for power quality improvement，which is composed of PWM AC chopper and power transformer. The primary side of the transformer is connected with the output of AC chopper through SSR（Solid-State-Relay），and its secondary side is connected in series with the load. When line voltage fluctuates，the compensation voltage is regulated by changing the output voltage of AC chopper and the switching states of SSR to keep the load voltage stable，for which，a feedforward feedback controller is designed based on DSP TMS320F2812. Without energy storage devices，such as battery，bulk capacitors or inductors，the proposed restorer compensates the grid voltage fluctuation effectively. Being small and cheap，the validity of the proposed scheme is verified by experiments. |
| Key words: AC chopper dynamic voltage restorer voltage control harmonic analysis feedforward feedback control electric network topology electric converters electric transformers |
