Design and Experimentation of a Dynamic Voltage Restorer Capable of Significantly Reducing an Energy-Storage Element
Design and Experimentation of a Dynamic Voltage Restorer Capable of Significantly Reducing an Energy-Storage Element
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DOI：
10.1109/ias.2005.1518446
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发表时间：
2008
影响因子：
4.4
通讯作者：
T. Jimichi;H. Fujita;Hirofumi Akagi
中科院分区：
文献类型：
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作者：
T. Jimichi;H. Fujita;Hirofumi Akagi
本文介绍了一种动态电压恢复器（DVR），或电压暂降补偿器，它由一组串联和并联变换器背靠背连接，三个串联变压器，和一个直流电容器安装在公共直流链路。DVR的特点是在电源侧安装串联变换器，在负载侧安装并联变换器。该系统配置允许使用极小的直流电容器，用于平滑公共直流链路电压。本文提供了一个设计过程中的直流电容器的电压骤降条件下，并提出了一种控制方法的串联变换器，这是能够降低电压额定值的串联变换器和串联变压器。实验结果表明，从200 V 5千瓦的实验室系统，以确认设计过程的有效性和控制方法的有效性。
This paper deals with a dynamic voltage restorer (DVR), or a voltage-sag compensator, which consists of a set of series and shunt converters connected back-to-back, three series transformers, and a dc capacitor installed on the common dc link. The DVR is characterized by installing the series converter on the source side and the shunt converter on the load side. This system configuration allows the use of an extremely small dc capacitor intended for smoothing the common dc-link voltage. This paper provides a design procedure of the dc capacitor under a voltage-sag condition and proposes a control method for the series converter, which is capable of reducing the voltage ratings of both the series converter and the series transformers. Experimental results obtained from a 200-V 5-kW laboratory system are shown to confirm the validity of the design procedure and the effectiveness of the control method.