储能型统一电能质量调节器电压补偿能力分析及提升方法  

Voltage Compensation Capability Analysis and Improvement Method for Unified Power Quality Conditioner with Energy Storage

作　　者：张震霄 年珩[1] 李培 马智泉 ZHANG Zhenxiao;NIAN Heng;LI Pei;MA Zhiquan(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;Electric Power Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]国网浙江省电力有限公司电力科学研究院,浙江省杭州市310014

出　　处：《电力系统自动化》2022年第23期151-159,共9页Automation of Electric Power Systems

基　　金：国网浙江省电力有限公司科技项目(5211DS19002V)的资助

摘　　要：储能型统一电能质量调节器(UPQC)能够在电网电压跌落时对负荷进行电压补偿,在电压跌落超出串联侧换流器补偿能力范围时,同时利用并联侧换流器功率补偿可以提升系统电压补偿能力。文中首先对串、并联侧换流器电压补偿之间的耦合影响进行了分析,建立了考虑储能型UPQC容量配置情况及负荷运行情况的UPQC电压补偿能力的数学模型。针对储能接入带来的并联侧换流器功率特性,研究了并联侧协同补偿时的功率分配,得到了能够进一步提升系统电压补偿能力的并联侧换流器功率指令的改进分配策略。接着,提出了适用于储能型UPQC协同电压补偿的串、并联侧换流器控制方法。最后,基于实时数字仿真系统搭建了储能型UPQC电压补偿的模型并进行仿真验证。仿真结果表明所提控制策略能够在相同容量配置条件下提升UPQC的电压补偿能力。The unified power quality conditioner(UPQC)with energy storage can compensate the load voltage when the power grid voltage drops.When the voltage sag exceeds the compensation capacity of the series-side converter,the voltage compensation capability can be improved by using the power compensation of the shunt-side converter synergistically.This paper analyzes the coupling influence of voltage compensation between series-and shunt-side converters,and establishes a mathematical model of the voltage compensation capability of UPQC considering the capacity configuration of converters and the load condition.Aiming at the power characteristics of the shunt-side converter brought by the access of energy storage,the power distribution of the shunt-side cooperative control is studied,and an improved distribution strategy of power commands of the shunt-side converter that can further improve the system voltage compensation capability is obtained.Then,this paper proposes a control method of series-and shunt-side converters for the cooperative voltage compensation of the UPQC with energy storage.Finally,a model of UPQC with energy storage for voltage compensation is built and verified by the simulation based on the real-time digital simulation system.The simulation results show that the proposed control strategy can improve the voltage compensation capability of UPQC with energy storage under the same capacity configuration.

关 键 词：统一电能质量调节器 电压暂降 电压补偿 无功补偿 协同控制 并网逆变器控制 实时数字仿真系统 

分 类 号：TM711[电气工程—电力系统及自动化]