基于坐标变换的三相逆变并网控制策略  

Grid-connected Control Strategy of Three-phase Inverters Based on Coordinate Transformation

作　　者：邓孝祥 张家琪 DENG Xiao-xiang;ZHANG Jia-qi(Institute of Electrical and Control Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院

出　　处：《通信电源技术》2019年第9期25-28,共4页Telecom Power Technology

基　　金：中国煤炭工业协会指导性计划项目(MTKJ2016-367);哈尔滨市应用技术研究与开发项目(RC2016XK008001)

摘　　要：针对PWM脉宽调制技术在三相并网逆变中无法有效消除谐波、电压利用率低的问题,通过建立旋转坐标系将交流量简化为直流量,简化了计算。利用SVPWM空间矢量控制策略控制三相并网逆变器,有效抑制了进网谐波,提高了电压利用率。在此基础上搭建Matlab/Simulink仿真模型,仿真结果表明了分析的正确性。在使用SVPWM时,系统运行稳定,电压利用率相较SPWM脉宽调制技术明显提高。In view of the problem that PWM pulse width modulation technology can not effectively eliminate harmonics and low voltage utilization in three-phase grid-connected inverters,AC is simplified to DC by establishing a rotating coordinate system,which simplifies the calculation.The three-phase grid-connected inverter is controlled by SVPWM space vector control strategy,which effectively suppresses the incoming harmonics and improves the voltage utilization.At the same time,the simulation model of MATLAB/Simulink is built on this basis.The results show that the simulation analysis is correct.When using SVPWM,the system runs steadily,effectively suppresses harmonics,and the voltage utilization ratio is significantly improved compared with SPWM pulse width modulation technology.

关 键 词：坐标变换 谐波抑制 SVPWM 三相并网逆变 

分 类 号：TM4[电气工程—电器]