变频器对不同类型电压暂降的耐受特性研究  

Study on tolerance characteristics of variable-frequency drives under different types of voltage sags

作　　者：李晨懿 汪坤 卢文清 徐永海[1] 龙云波[1] Li Chenyi;Wang Kun;Lu Wenqing;Xu Yonghai;Long Yunbo(State Key Laboratory of Alternate Electrical Power System With Renewable Energy Source,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《电测与仪表》2018年第15期1-7,共7页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51277069)

摘　　要：常见电压暂降类型包括三相暂降、两相暂降和单相暂降,不同类型的暂降对变频器的影响程度有较大的不同,需要研究能够代表变频器在不同类型暂降下的耐受特性的统一规范。文中通过机理分析、仿真和试验研究,给出了变频器在不同暂降类型下具有一定代表性的通用耐受曲线包络线。分析了变频器受不同类型暂降的影响机理,并在MATLAB/Simulink环境下搭建仿真模型进行验证;搭建了试验平台,选取国内市场具有代表性的7种品牌、2种功率(7.5 k W和18.5 k W)的8台变频器进行测试,与理论分析和仿真研究进行相互验证,其结论基本一致。通过对试验结果的处理,得到了变频器在额定转矩转速时不同暂降类型下的通用耐受曲线包络线,具有实际应用价值,可为变频器耐受曲线标准的制定提供重要参考。Common types of voltage sags include three-phase sags,two-phase sags and single-phase sags,which have different degrees of harm to variable-frequency drives（ VFDs）. Accordingly,it is necessary to study the unified specifications for the tolerance characteristics of VFDs under different types of sags. This paper presented universal tolerance curve envelopes of VFDs under different types of sags by theoretical analysis,simulation and experiments. Firstly,the influence mechanism of different types of sags on VFDs was analyzed,which was verified by simulation module carried out in MATLAB/Simulink later. Then,a test platform was built to test 8 VFDs of 7 representative brands and 2 kinds of power（ 7. 5 k W and 18. 5 k W）. The results of experiments,theoretical analysis and simulation were verified by each other,and their conclusions are basically consistent. Finally,the universal tolerance curve envelopes of VFDs under different types of sags in the rated torque and speed were obtained by dealing with the results from experiments in some way,which have practical application value and can provide efficient reference for the standard of tolerance curve for VFDs to be formulated.

关 键 词：变频器 电压暂降类型 耐受曲线 仿真 试验 

分 类 号：TM933[电气工程—电力电子与电力传动]