CAJ | 학술논문

针对采用直流母线拓扑的电动汽车充电站，为降低成本和损耗而不增加变压器结构时存在漏电流的问题，对无变压器隔离的直流母线充电站漏电流产生的原因进行了理论分析，在此基础上提出了一种无变压器结构直流母线充电站共模漏电流模型。根据提出的建模方法和SVPWM整流器理论，最终给出了共模电压和漏电流的数学描述，并进一步分析了整流器采用SVPWM控制时不同空间矢量合成方式对充电站系统共模电压和漏电流的影响，得到了不同空间矢量合成方式对应的共模电压和电流。最后，通过仿真和实验验证了该模型和矢量合成方式理论分析的正确性。
침대채용직류모선탁복적전동기차충전참，위강저성본화손모이불증가변압기결구시존재루전류적문제，대무변압기격리적직류모선충전참루전유산생적원인진행료이론분석，재차기출상제출료일충무변압기결구직류모선충전참공모루전류모형。근거제출적건모방법화SVPWM정류기이론，최종급출료공모전압화루전류적수학묘술，병진일보분석료정류기채용SVPWM공제시불동공간시량합성방식대충전참계통공모전압화루전류적영향，득도료불동공간시량합성방식대응적공모전압화전류。최후，통과방진화실험험증료해모형화시량합성방식이론분석적정학성。
In order to reduce costs and loss, the electric vehicle charging station with the DC bus topology does not add the isolation transformer, and produces leakage current. Based on a theoretical analysis of the reason of producing leakage current, a common mode leakage current model of transformerless DC bus charging station is proposed. Based on this model and the theory of SVPWM converter, the mathematical descriptions of common mode voltage and leakage current are given. The effect of different space vector synthesis modes on the common mode voltage and leakage current of charging station system is analyzed when the grid-connected inverter uses SVPWM control. The common mode voltage and current of different space vector synthesis modes are obtained. Experiments and simulation verify the correctness of the modeling method and space vector synthesis theory.