基于三电平典型拓扑结构的SVPWM调制策略研究  

Research on SVPWM modulation strategy based on three-level typical topology structure

作　　者：王超然 刘宇蝶 WANG Chaoran;LIU Yudie(College of Physics and Electronic Engineering,Hanjiang Normal University,Shiyan 442000,China)

机构地区：[1]汉江师范学院物理与电子工程学院,湖北十堰442000

出　　处：《无线互联科技》2024年第12期1-6,10,共7页Wireless Internet Technology

基　　金：汉江师范学院省级大学生创新创业训练计划项目,项目编号:S202210518056;汉江师范学院省级大学生创新创业训练计划项目,项目编号:S202210518055;汉江师范学院教学改革研究项目,项目名称:基于OBE理念的学生工程实践能力提升研究——以汉江师范学院为例,项目编号:2022B17。

摘　　要：当前,我国的新能源技术面临发电量受外界因素影响较大、电能不能稳定输出等问题,大功率变换器的使用是解决此问题的关键,多电平逆变器能够满足大功率变换器的高压大功率化需求。文章以T型三电平逆变器为研究对象,分析了其调制算法和中点电位平衡问题,并进行了仿真验证。根据空间矢量脉宽调制(Space Vector Pulse Width Modulation,SVPWM)算法的原理,文章分析了中点电位不平衡对空间电压矢量作用的不良影响。基于MATLAB/Simulink平台,文章搭建了仿真模型,仿真结果证明了三电平SVPWM算法对中点平衡控制策略的有效性。所提方法能够弥补原有算法操作复杂的不足,对三电平乃至多电平逆变器的工程应用具有促进作用。Currently,the development of new energy technologies in our country faces problems such as large external factors affecting power generation and unstable output of electrical energy.Application of high power converters are the key solution to solve this problem,and the multi-level inverters can meet the requirements of high voltage and high power transformation of high-power converters.Taking the T-type three-level inverter as the research object,this article analyzes its modulation algorithm and midpoint potential balance problem,and conducts simulation research.Based on the principle of SVPWM modulation algorithm,the adverse effects of midpoint potential imbalance on space voltage vector are analyzed.A simulation model is built based on MATLAB/Simulink platform,and the effectiveness of three-level SVPWM modulation algorithm on midpoint balance control strategy is verified by the simulative results.The proposed method compensates for the shortcomings of complex algorithm operations and has a promoting effect on the engineering application of three-level and even multi-level inverters.

关 键 词：T型三电平逆变器 中点电位不平衡 SVPWM算法 

分 类 号：TM464[电气工程—电器] TP273[自动化与计算机技术—检测技术与自动化装置]