一种小输入侧电感具有漏电流抑制能力的单相单级电流源型逆变器  

A Single-phase Single-stage Current Source Inverter With Small Input Side Inductor and Leakage Current Suppression Capability

作　　者：岳秀梅 郭明乾 朱晓楠 汪洪亮 唐伟 李中奇 YUE Xiumei;GUO Mingqian;ZHU Xiaonan;WANG Hongliang;TANG Wei;LI Zhongqi(College of Electrical and Information Engineering,Hunan University,Changsha 410000,Hunan Province,China;School of Electrical and Automation Engineering,East China Jiaotong University,Nanchang 341500,Jiangxi Province,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410000 [2]华东交通大学电气与自动化工程学院,江西省南昌市341500

出　　处：《中国电机工程学报》2022年第12期4516-4525,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51977069);湖南省自然科学杰出青年基金项目(2019J01251)。

摘　　要：传统的电流源型逆变器通常需要很大的直流侧电感保证输入电流的恒定,增加逆变器的体积、成本和损耗。当电流源型逆变器应用在光伏并网发电系统时,还需具备漏电流抑制的能力。文章提出一种新型的无变压器单相单级电流源型逆变器,能够根据输入电压和电网电压间的关系在Buck模态和Boost模态之间切换,在逆变器的整个运行流程中能够保持共模电压的恒定,从而有效地抑制漏电流的产生。所提逆变器无需保持输入侧电流的恒定,可以降低对输入侧电感的需求。最后,通过搭建一个220V/1500W的实验平台以验证所提方案的可行性。The conventional current source inverter(CSI)needs large dc-link inductor to keep the input current constant,which leads to the increase of the size,cost,and losses.What’s more,when the CSI is applied in the photovoltaic grid connected power generation system,it needs to have the ability of leakage current suppression.This paper presented a novel transformerless single-phase single-stage current source inverter(SS-CSI),which could switch between Buck mode and Boost mode according to the relationship between the input voltage and the grid voltage.It could also keep the common mode voltage(CMV)constant in the whole operation process of the inverter to effectively suppress the leakage current.SS-CSI does not need to keep the input current constant,so it can greatly reduce the demand for input inductor.Finally,a 220V/1500W experimental platform was built to verify the feasibility of the proposed CSI.

关 键 词：电流源型逆变器 漏电流 直流侧电感 光伏 

分 类 号：TM46[电气工程—电器]