一种混合型有源中点钳位型三电平逆变器的效率优化与热管理技术  

HYBRID THREE-LEVEL ACTIVE NEUTRAL POINT CLAMPED INVERTER WITH BOTH EFFICIENCY AND TEMPERATURE DISTRIBUTION

作　　者：冯之健 赵树哲 孙自祥 张馨元 赵涛 Feng Zhijian;Zhao Shuzhe;Sun Zixiang;Zhang Xinyuan;Zhao Tao(School of Electrical Engineering,Qingdao University,Qingdao 266071,China)

机构地区：[1]青岛大学电气工程学院,青岛266071

出　　处：《太阳能学报》2025年第3期373-383,共11页Acta Energiae Solaris Sinica

基　　金：山东省自然科学基金青年基金项目(ZR2022QE057)。

摘　　要：针对三电平有源中点钳位型(3L-ANPC)逆变器存在调制复杂、难以同时兼顾高效率和散热均衡等问题,提出一种新型Si-SiC混合型3L-ANPC逆变器电路拓扑及调制策略。当输出电压被钳位至中性点时,采用上下桥臂双支路同时导通的续流方式,有效降低通态损耗;此外,引入过渡零状态调整驱动时序,使得硬开关损耗集中于两个SiC金属氧化物半导体场效应晶体管(MOSFET)以降低开关损耗,同时均衡各开关管的温度。首先介绍Si-SiC混合型3L-ANPC逆变器的工作原理,然后建立其损耗模型和热模型并进行理论分析,最后搭建单相有源中点钳位型(ANPC)实验平台进行实验验证。仿真与实验结果表明,相较于传统基于Si器件的方案,所提方案的效率提高约2.8%,开关管最高结温降低3.6℃。Three-level active-neutral point-clamped(3L-ANPC)inverters have been widely used in medium and high power photovoltaic systems,but at present,3L-ANPC inverters still suffer from the problems of complex modulation,difficulty in simultaneous high-efficiency and heat dissipation equalization.Therefore,this paper proposed a novel Si-SiC hybrid 3L-ANPC inverter circuit topology and modulation strategy.When the output voltage is clamped to the neutral point,the dual-branch continuity method of simultaneous conduction of the upper and lower bridge arms is adopted to effectively reduce the conduction loss,in addition,the introduction of the transition zero state adjusts the drive timing,so that the hard switching losses are concentrated in the two SiC MOSFETs to reduce switching losses and equalize the temperature of each switching tube at the same time.In this paper,the working principle of the proposed Si-SiC hybrid 3L-ANPC inverter is firstly introduced,then its loss model and thermal model are established and theoretically analyzed,and finally a single-phase ANPC experimental platform is built for experimental verification.The experimental results show that compared with the conventional scheme based on Si IGBT,the scheme in this paper has about 2.8%higher efficiency and 3.6°C lower switching tube temperature.

关 键 词：三电平逆变器 SiC MOSFET 损耗建模 效率分析 热管理 

分 类 号：TM464[电气工程—电器]