并联逆变器馈电PMSM调速系统谐波和环流控制

发布时间：2018-11-16 13:02

【摘要】：针对大功率场合下并联逆变器馈电永磁同步电机(PMSM)调速系统中存在的环流问题和电机电流谐波性能差的问题,提出一种并联逆变器馈电永磁同步电机控制策略来协调控制不同并联逆变器模块实现电机总电流波形优化,并有效地抑制并联逆变器模块间环流。分析并联逆变器馈电PMSM调速系统的电路结构及并联逆变器环流的等效电路模型,提出针对并联逆变器PMSM调速系统的移相空间矢量脉宽调制(SVPWM)技术和随机SVPWM技术,并通过在SVPWM中动态分配零矢量作用时间来抑制各逆变器模块间的环流。仿真和实验结果均验证了所提出的控制策略的有效性,采用移相SVPWM和随机SVPWM策略可改善电机电流的谐波性能,采用环流抑制环节后可以有效地消除电路中的环流。
[Abstract]:Aiming at the problems of circulating current and poor current harmonic performance in (PMSM) speed control system of PMSM fed by parallel inverter in high power situation, A control strategy of PMSM fed by parallel inverter is proposed to coordinate and control the different parallel inverter modules to optimize the total current waveform of the motor and to effectively suppress the circulation between the modules of the parallel inverter. This paper analyzes the circuit structure of the parallel inverter fed PMSM speed control system and the equivalent circuit model of the parallel inverter circulation, and puts forward the phase-shifted space vector pulse width modulation (SVPWM) and random SVPWM technology for the parallel inverter PMSM speed regulating system. In order to suppress the circulation between the inverter modules, the zero vector time is dynamically allocated in SVPWM. The simulation and experimental results verify the effectiveness of the proposed control strategy. The harmonic performance of motor current can be improved by using phase-shifted SVPWM and random SVPWM strategy, and the circulation in the circuit can be effectively eliminated by using the loop suppression link.
【作者单位】：东南大学电气工程学院;国网甘肃省电力公司电力科学研究院;
【基金】：国家重点基础研究发展计划项目973(2013CB035603) 国家自然科学基金(51007008) 教育部留学回国人员科研启动基金项目
【分类号】：TM464

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