阻感负载条件下分布式交流充电桩混合控制  

Distributed AC Charging Pile Hybrid Control Under Resistive Load Condition

作　　者：迟福建 陈艳波[2] 王伟臣[1] 李桂鑫[1] CHI Fu-jian;CHEN Yan-bo;WANG Wei-chen;LI Gui-xin(State Grid Tianjin Electric Power Company,Tianjin 300010,China;不详)

机构地区：[1]国网天津市电力公司,天津300010 [2]华北电力大学,北京100096

出　　处：《电力电子技术》2022年第11期65-67,91,共4页Power Electronics

摘　　要：分布式交流充电桩通常采用具有高功率密度的多电平脉宽调制(PWM)整流拓扑,且接入的充电负载特性多为阻感特性。此处以三相三电平VIENNA整流器作为分布式交流充电拓扑研究对象,建立了三相三电平VIENNA整流器在阻感负载下的数学模型。为提升阻感负载条件下VIENNA整流器的动态响应能力和系统控制稳定性,利用无源控制理论,设计了基于欧拉-拉格朗日(EL)模型的内环无源电流控制器,同时结合常规比例积分(PI)调节器实现对外环直流母线电压的精准控制。最后通过搭建的2 kW原理样机对所提系统混合控制策略开展了实验验证,实验结果表明所提控制策略能够使三相VIENNA整流器运行于单位功率因数,且具有优良的静态/动态系统稳定性,验证了所提无源控制与常规PI控制融合的混合控制策略的可行性。The distributed AC charging pile usually adopts the multi-level pulse width modulation(PWM) rectifier topology with high power density,and the charging load characteristic is mostly resistive characteristic.The three-phase three-level VIENNA rectifier is used as the research object of distributed AC charging topology,and a mathematical model of the three-phase three-level VIENNA rectifier under resistive load is established.In order to improve the dynamic response and system control stability of the VIENNA rectifier under resistive load condition,an inner loop passive current controller based on Euler-Lagrange(EL) model is designed using passive control theory.At the same time,the external loop DC bus voltage can be accurately controlled combined with the conventional proportional integral(PI)regulator.Finally,through constructing 2 kW prototype,the proposed system hybrid control strategy is carried out by experiment,the experimental results show that the proposed control strategy can make the three-phase VIENNA rectifier run in unit power factor,and it has excellent static/dynamic system stability,the feasibility of the proposed passive control with conventional PI hybrid control strategy is verified.

关 键 词：整流器 多电平脉宽调制 阻感负载 

分 类 号：TM461[电气工程—电器]