无电解电容变频器的母线电压振荡抑制研究  

Research on Bus Voltage Oscillation Suppression of Electrolytic Capacitor-less Inverter

作　　者：杨逸帆 尹晗 陆治冶 于雪莹 YANG Yifan;YIN Han;LU Zhiye;YU Xueying(Aerospace Architecture Design and Research Institute Co.,Ltd.,Beijing 100162,China;Shenyang Aerospace Mitsubishi Motors Engine Manufacturing Co.,Ltd.,Shenyang 110179,Liaoning,China;Institute of Electrical and Information,Northeast Agricultural University,Harbin 150030,Heilongjiang,China)

机构地区：[1]航天规划设计集团有限公司,北京100162 [2]沈阳航天三菱汽车发动机制造有限公司,辽宁沈阳110179 [3]东北农业大学电气与信息学院,黑龙江哈尔滨150030

出　　处：《电气传动》2023年第12期40-46,共7页Electric Drive

摘　　要：针对传统电解电容变频器体积大、使用寿命短的问题,采用薄膜电容代替电解电容构成无电解电容交-直-交结构的变频器。针对无电解电容变频器V/F运行在低频过程中母线电压振荡的问题,首先根据感应电机的等效电路模型分析不同工作模式下的母线电压纹波和谐振特性,采用劳斯稳定判据分析无电解电容驱动系统的稳定条件;其次根据无电解电容驱动系统的数学模型,分析振荡过程中母线电压和定子无功电流的关系;最后提出基于定子电压定向的无功电流反馈控制策略抑制母线电压振荡,提高系统稳定性。仿真和实验结果表明,所提控制策略能够在全域范围内实现感应电机的稳定运行,有效提高系统稳定性。In order to solve the problems of large volume and short service life of the traditional electrolytic capacitor frequency converter,the thin film capacitor was used to replace the electrolytic capacitor to constitute the AC-DC-AC frequency converter without electrolytic capacitor.Aiming at the problem of bus voltage oscillation in the process of low frequency V/F operation of electrolytic capacitor-less inverter,firstly,the bus voltage ripple and resonance in different working modes were analyzed according to the equivalent circuit model of induction motor,and the stability condition of electrolytic capacitor-less drive system was analyzed by using Rous stability criterion.Secondly,according to the mathematical model of the drive system without electrolytic capacitor,the relationship between the bus voltage and the stator reactive current during the oscillation process was analyzed.Finally,a reactive current feedback control strategy based on stator voltage direction was proposed to suppress bus voltage oscillation and improve system stability.The simulation and experimental results show that the proposed control strategy can realize the stable operation of the induction motor in the global range and effectively improve the stability of the system.

关 键 词：无电解电容变频器 无功电流 感应电机 谐振抑制 

分 类 号：TM732[电气工程—电力系统及自动化]