交流电机变频软启动及并网系统研究  

Research on Frequency Soft Starting and Synchronous Switching Control between Inverter Power and Power Supply about AC Motor

作　　者：徐书涛 李崇坚[1] 王成胜[2,3] 葛刚[1] 段巍[2] 

机构地区：[1]冶金自动化研究设计院,北京100071 [2]北京金自天正智能控制股份有限公司,北京100071 [3]混合流程工业自动化系统及装备技术国家重点实验室,北京100071

出　　处：《电气传动》2017年第1期51-54,共4页Electric Drive

摘　　要：针对交流永磁同步电机在变频驱动下切换到工频时会产生很大的冲击电流,应用一种全数字化单同步坐标系软件锁相环(SSRF-SPLL)方法,采用电力电子开关器件代替交流接触器实现电机向电网小冲击电流的同步切换。该锁相方法能够很好地跟踪电网的频率、相位和幅值,电力电子开关器件可以大大缩短切换延迟时间。从仿真和实验角度检验了方案的可行性和准确性,其实验切换电压平稳,切换电流在其额定电流的1.5倍以下。Because,there will be have big impact of current during the synchronous transforming betweeninverter power and power supply in the permanent magnet synchronous motor(PMSM). So applyed an all-digitalsingle synchronous reference frame software phase locked loop(SSRF-SPLL)method and used power electronicswitching devices instead of AC contactor switching to it. The phase-locked method could be a good track forfrequency,phase and amplitude of grid,and the power electronic devices could greatly reduce the handover latency.From the perspective of simulation and experiment,the feasibility and accuracy of the program are tested,theexperimental switching voltage is smooth,and the switching current is less than 1.5 times its rated current.

关 键 词：永磁同步电机 单同步坐标系软件锁相环 电力电子开关 同步切换 实验和仿真 

分 类 号：TM341[电气工程—电机]