矿用变频器三电平PWM整流器控制策略研究  

Research on Control Strategy of Three-Level PWM Rectifier for Mining Frequency Converter

作　　者：周德华 ZHOU Dehua(CCTEG Taiyuan Research Institute Co., Ltd., Taiyuan 030006, China)

机构地区：[1]中国煤炭科工集团太原研究院有限公司,山西太原030006

出　　处：《煤矿机电》2020年第5期44-47,51,共5页Colliery Mechanical & Electrical Technology

基　　金：山西省高新技术领域重点研发计划项目(201803D121121)。

摘　　要：为对矿用变频器的控制提出更高的要求,对三相三电平整流器在三相不平衡的情况下进行了分析研究,主要通过数学分析建立了三电平PWM整流器在dq坐标系中的数学模型。要给出控制方法,即在三相电网电压不平衡的情况,给出抑制网侧负序电流不平衡控制策略。通过仿真表明,该控制能改善网测电流波形,使其基本对称,证实了控制策略的有效性。In order to put forward higher requirements for the control of mine frequency converter,the three-phase three-level rectifier has been analyzed and studied under the condition of three-phase imbalance.The mathematical model of three-level PWM rectifier in dq coordinate system has been mainly established through mathematical analysis.The control method has been given,that is,the control strategy to suppress the negative sequence current imbalance has been given in the case of voltage imbalance in three-phase power grid.The simulation results showed that the control can improve the network current waveform and make it symmetrical,which can prove the effectiveness of the control strategy.

关 键 词：矿用变频器 三电平PWM整流器 电网不平衡 

分 类 号：TN773[电子电信—电路与系统]