单相动态电压恢复器复合控制技术  

Study on Compound Control Technology of Single-phase Dynamic Voltage Restorer

作　　者：施烨[1] 吴在军[1] 窦晓波[1] 胡敏强[1] 赵波 

机构地区：[1]东南大学电气工程学院,南京210096 [2]浙江省电力公司电力科学研究院,杭州310014

出　　处：《电工技术学报》2015年第17期85-95,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51177015;51307023);新世纪优秀人才支持计划(NCET-13-0129);国家高技术研究发展(863)计划(2014AA052002);国家电网公司项目(5211011400AX)资助

摘　　要：提出在使用直接电流控制策略对动态电压恢复器(DVR)电流内环基波分量进行前馈的基础上,利用改进型比例谐振(PR)控制器形成电压外环进行反馈控制,从而构成单相DVR的复合控制策略;并提出使用改进型自适应算法提取系统基波矢量,基于无功功率补偿策略的思想,利用矢量运算分别获得电压外环反馈控制参考值与电流内环前馈控制参考值的方法。所提出的复合控制策略能够在增强DVR稳定性的同时显著提高其响应速度,使得DVR能对系统电压基波波动及谐波扰动进行补偿,具备功率因数校正的新功能。最后通过仿真和实验,验证了所提算法的可行性和有效性。In this paper,a novel composite control strategy is proposed,which contains the load current direct feedforward control strategy for the inner loop and the improved proportional resonant（ PR） feedback control strategy for the outer loop. The fundamental voltage and current vectors are extracted by an improved adaptive algorithm. Then the reference values of the voltage loop and the current loop are got via vector calculation based on the reactive power compensation strategy. In this way,the suggested compound control technology can enhance the stability and fasten the responding speed at the same time for the dynamic voltage restorer（ DVR）and make it suitable for compensating fundamental and harmonic frequency fluctuation and has the ability of power factor correction. The feasibility and effectiveness of the proposed algorithm are verified by the simulation and the experimental results.

关 键 词：动态电压恢复器 直接电流控制 比例谐振控制 无功补偿 矢量控制 

分 类 号：TM464[电气工程—电器]