基于脉冲跳变SVPWM的单相中点钳位型H桥级联逆变器开关损耗解析计算  

Analytical Calculation of Switching Loss of Single-Phase Neutral Point Clamped H-Bridge Cascaded Inverters Based on SVPWM

作　　者：原景鑫 朱俊杰[1] 聂子玲[1] 叶伟伟 贾英杰[1] 董蕾 Yuan Jingxin;Zhu Junjie;Nie Ziling;Ye Weiwei;Jia Yingjie;Dong Lei(National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering,Wuhan 430033 China;Military Representative Office of Naval Equipment Departments in Shanghai and Ningbo,Ningbo 315000 China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033 [2]海军装备部驻上海地区军事代表局驻宁波地区军事代表室,宁波315000

出　　处：《电工技术学报》2020年第23期4877-4887,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51977218)。

摘　　要：为实现单相中点钳位(NPC)型H桥级联逆变器性能优化设计,分析基于脉冲跳变空间矢量脉宽调制(SVPWM)均压调制的开关损耗计算方法。针对开关管有效动作频率与控制频率不同、开关动作分散且无规律的问题,提出基于整体的开关损耗计算方法,直接计算得到所有开关的暂态损耗之和;针对均压冗余矢量动作不确定的问题,提出最值估算法对开关暂态损耗进行理论估算。仿真结果表明,推导的开关损耗解析式计算值与实际值的单个周期最大误差为9.55%,最小误差为1.29%,实验得到的损耗结果与理论值最大误差均在10%以内,表明该损耗解析式较为准确。In order to optimize the performance of single-phase neutral point clamped(NPC)Hbridge cascaded inverter,the calculation method of switching loss based on pulse-shifting space vector pulse width modulation(SVPWM)voltage-sharing modulation is analyzed.To solve the problem that the effective switching frequency and control frequency are different,and the switching action is scattered and irregular,a new method based on the pulse-shifting SVPWM voltage-sharing modulation is proposed.The total switching loss calculation method directly calculates the sum of all switching transient losses.Aiming at the uncertainty of balancing voltage redundancy vector action,a maximum estimation method is proposed to estimate the switching transient losses.The simulation results show that the maximum and minimum errors of the calculated and actual switching losses are 9.55%and 1.29%respectively.The maximum errors of the experimental results and the theoretical values are less than 10%,which shows that the analytical expressions are more accurate.

关 键 词：开关损耗 单相中点钳位型H桥级联逆变器 脉冲跳变空间矢量脉宽调制 有效开关频率 

分 类 号：TM76[电气工程—电力系统及自动化]