基于自适应准谐振控制的变频器并联VF开环均流控制策略  

VF Open-loop Current Sharing Control Strategy for Inverter Unit in Parallel Based on Adaptive Quasi Resonance Control

作　　者：高巧玲[1] 秦灿华 GAO QiaoLing;QIN Canhua(Hunan Railway Professional Technology, Zhuzhou Hunan 412001 China;Zhuzhou CRRC Times Electric Co. , Ltd. , Zhuzhou Hunan 412001 China,)

机构地区：[1]湖南铁道职业技术学院,湖南株洲412001 [2]株洲中车时代电气股份有限公司,湖南株洲412001

出　　处：《微电机》2020年第7期79-83,共5页Micromotors

摘　　要：针对采用VF开环控制的变频器机组并联中出现的环流问题,提出了一种引入频率自适应准谐振控制器的VF开环控制策略,利用准谐振控制器在谐振频率处增益无穷大的特点消除系统不平衡扰动分量,同时根据电机负载的输出频率时变的特性,构建了频率自适应的准谐振控制器。仿真和实验证明,在保留VF开环控制对负载强适应性的基础上,该策略能很好的实现变频器机组并联均流控制。To solve the circulation problem in parallel connection of inverter unit with VF open loop control.A VF open-loop control strategy with frequency adaptive quasi-resonant controller was proposed.The characteristic of infinite gain of quasi-resonant controller at resonant frequency was used to eliminate the unbalanced disturbance component of the system.And according to the characteristics of time-varying output frequency of motor load.A frequency adaptive quasi-resonant controller was constructed.Simulation and experiment show that this strategy can realize current sharing control of inverter unit in parallel well on the basis of retaining the strong adaptability of VF open-loop control to load.

关 键 词：VF开环控制 机组并联 均流控制 准谐振控制器 频率自适应 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]