动态电压恢复器的复合控制策略研究.pdfVIP

学兔兔 总第48卷 第550期 电测与仪表 VO1．48 No．550 20l1年 第l0期 Electricai MeasurementInstrumentation 0ct．2011 动态电压恢复器的复合控制策略研究木 闵晶妍，陈红兵 (襄樊学院物理与电子工程学院，湖北襄阳441053) 摘要：深入分析了动态电压恢复器(DVR)的三种控制策略，指出了这三种控制策略的优缺点，建立了DVR的数 学模型，提出了一种改进的复合控制策略，并对电流调节器和电压调节器的参数进行了整定，进而分析了校正 后电流环和电压环的动态特性和静态特性。比较了三种工况下DVR的补偿特性，实验结果表明，提出的复合控 制策略克服了基于电容电流内环的复合控制策略的不足，并且比前馈控制策略具有更好的动静态性能和适应 性。 关键词：动态电压恢复器；复合控制策略；控制算法；动态特性 中图分类号：TM464 文献标识码：A 文章编号：1001—1390(2011)10—0055—05 Research on Compound Control Strategy for Dynamic Voltage Restorer MIN Jing-yan，CHEN Hong-bing (School ofPhysics and Electronic engineering，Xiangfan University，Xiangyang 441053，Hubei，China) Abstract：The three control methods that are usually applied in dynamic voltage restorer(DVR)are fully analyzed in this paper，and advantages and weak of three control methods are pointed out．Mathematical model of DVR is given． Based on this model，the improved compound control strategy is proposed．The current-and the voltage-regulator parameters of the compound control method are tuned，and the dynamic-and the steady-performance are analyzed． Compensating performances of DVR have been analyzed comparably．Experimental results show that the proposed control strategy has gotten grid of disadvantages of the compound control strategy based on inter loop of capacitor’S current feedback control，and the steadY state-and dynamic—performance and adaptability of the proposed control strategy are more excellent than those of forward—feed control method． Key words：dynamic voltage restorer，compound control strategy，control algorithm，dynamic performance 0 引 言 态性能，但负载功率因数的下降而使系统阻尼减小， 动态电压恢复器(DVR)串联