基于SVPWM的三相电流源型逆变器简化重叠区补偿策略  

Simplified overlap-time compensation strategy for three-phase current source inverter based on SVPWM

作　　者：严庆增 张子旭 郭龙振 何金奎[1] 冯兴田[1] YAN Qingzeng;ZHANG Zixu;GUO Longzhen;HE Jinkui;FENG Xingtian(College of New Energy,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580

出　　处：《实验技术与管理》2024年第12期104-110,共7页Experimental Technology and Management

基　　金：国家自然科学基金面上项目(52277208);中央高校基本科研业务费专项资金资助项目(23CX07012A);山东省研究生优质专业学位教学案例库项目(SDYAL2023028);山东省高等学校青创科技支持计划(2023KJ066)。

摘　　要：电流源型逆变器(current source inverter,CSI)自带升压特性,且直流侧储能电感可提供良好的限流能力,具有较高的可靠性。CSI可应用于光伏发电、大功率电机驱动等领域。在CSI的调制中需要在互补驱动信号中添加驱动重叠区,以提供续流通路,但会使输出电流谐波增加。该文首先分析传统三相CSI的空间矢量脉宽调制(space vector pulse width modulation,SVPWM)及其重叠区效应,进而提出基于SVPWM的简化重叠区补偿策略,并通过MATLAB/Simulink进行了仿真验证。提出的简化重叠区补偿策略能够有效消除重叠区引起的电流畸变,并且简化了实现过程、降低了计算量。[Objective]Current source inverter(CSI)is a highly promising power electronic converter.Because of its large inductance connected in series on the DC side,the CSI exhibits a boost characteristic.Moreover,its power circuit can endure a short shoot-through state,providing relatively high reliability.At present,CSI is applied in fields such as photovoltaic power generation and high-power motor drives and is an important equipment for electrical energy conversion.Many characteristics of CSI include duality attributes with the voltage source inverter(VSI).To prevent shoot-through failure,a dead time must be added between complementary drive signals in the VSI.Correspondingly,in the CSI,an overlap region between the complementary drive pulses must be added to provide a freewheeling path.The overlap-time effect of CSI is similar to the dead-time effect of the VSI,which can also increase the output current harmonics.The overlap-time effect must be compensated to improve the quality of output power.Meanwhile,conventional space vector pulse-width modulation(SVPWM)requires a series of complex steps,such as sector determination,time calculation,and allocation.Simplified SVPWM can be applied in VSI to reduce the computational complexity.However,there is limited research on simplified SVPWM for three-phase CSI.If the overlap-time compensation strategy is implemented using conventional SVPWM,the implementation process becomes complex and computationally intensive.[Methods]Therefore,in this paper,the conventional SVPWM implementation method is analyzed for three-phase CSI.Accordingly,a simplified SVPWM for generating saddle-shaped modulation waves is proposed,which can avoid a series of complex steps.Furthermore,the current deviation vector generated by the overlap-time effect is analyzed.A simplified overlap-time compensation strategy based on SVPWM is proposed.[Results]A three-phase CSI simulation model was built in MATLAB/Simulink to verify the proposed simplified overlap-time compensation strategy based on SVPWM.The overlapp

关 键 词：电流源型逆变器 空间矢量脉宽调制 重叠区效应 简化重叠区补偿 

分 类 号：TM464[电气工程—电器]