三相桥式变流器负序电流补偿策略  

Negative Sequence Current Compensation Strategy for Three-phase Bridge Converter

作　　者：周丽莹 夏昌浩[1,2] ZHOU Liying;XIA Changhao(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,Hubei,China;Hubei Provincial Engineering Technology Research Center for Microgrid(China Three Gorges University),Yichang 443002,Hubei,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]湖北省微电网工程技术研究中心(三峡大学),湖北宜昌443002

出　　处：《电气传动》2022年第9期39-45,共7页Electric Drive

基　　金：国家自然科学基金资助项目(51607105)。

摘　　要：三相桥式变流器被广泛应用于低压配网补偿负序电流和无功电流,由于其造价较为昂贵,因此提高有限容量设备补偿效果具有很高的经济价值和研究意义。依据设备容量约束求解负序补偿电流可行域,建立求解最小负序剩余度的数学模型,并基于解析几何法求解最优补偿解。最后,通过Matlab数值计算和PSCAD/EMTDC仿真验证所提优化综合补偿策略的有效性。仿真结果表明所提优化综合补偿策略有效地提升了补偿效果。Three-phase bridge converters(TPBC)are widely used in low-voltage power distribution networks to compensate the negative-sequence current and the reactive current.Because of the relatively high costs,improving the compensation effect of limited capacity equipment has high economic value and research significance.The feasible region of negative-sequence compensation current was solved according to equipment capacity constraints,a mathematical model for solving the minimum negative-sequence residual degree was built,and the optimal compensation solution was solved based on the analytic geometry method.Finally,the effectiveness of the optimized comprehensive compensation strategy proposed was verified using Matlab numerical calculation and PSCAD/EMTDC simulation.The simulation results show that the proposed optimized comprehensive compensation strategy effectively improves the compensation effect.

关 键 词：负序补偿 三相桥式变流器 并联补偿器 解析几何 

分 类 号：TM28[一般工业技术—材料科学与工程]