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中文摘要：
为处理常规统一电能质量调节器（UPQC）难以解决的电源瞬时中断或电压暂降较深的问题,提出利用超级电容器储能系统（SESS）构成UPQC的直流储能单元.针对基于SESS的UPQC拓扑结构,研究UPQC单元优化配置的影响因素和目标函数,得出UPQC系统级功率流协调控制的最佳工作条件;分析SESS的主电路结构特点和性能,确定储能单元的容量和SESS控制策略;根据UPQC串、并联变流器的工作要求,提出基于PI控制和重复控制的UPQC单元级控制策略.仿真与实验分析结果表明,所提出的拓扑结构和控制策略在达到电能质量治理目标的同时,实现了UPQC串、并联变流器以及SESS协调控制.
英文摘要：
Aiming at the instantaneous supply interrupt and deep voltage sag of conventional UPQC （Unified Power Quality Conditioner）,SESS（Supercapacitor Energy Storage System） is recommended as its DC storage unit.According to the topology of SESS-based UPQC,the influencing factors and target function of its optimal allocation are studied and the best working conditions of its coordinated power flow control are obtained.The characteristics and performances of SESS＇s main circuit are studied and the storage unit capacity and SESS control strategy are determined.PI and repetitive control is proposed as the unit control strategy of UPQC according to the working requirements of its serial-parallel converters.Simulative and experimental results show that the coordinated control between serial-parallel converters and SESS is realized as well as the target of power quality management.
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