摘要
针对矿井提升机运行特点,采用由模块化多电平整流器和模块化多电平逆变器构成的背靠背模块化多电平变流器用于矿井提升机控制;针对目前通过直流侧对模块化多电平逆变器进行预充电的控制研究较少的问题,提出了一种模块化多电平逆变器预充电控制策略。该控制策略通过控制充电电流来控制子模块充电状态,使子模块电容充电至模块化多电平变流器稳定运行时的电压要求,同时将充电电流和充电过程中产生的过电压限定在安全范围内,使充电时间最短。仿真结果验证了该控制策略的有效性。
According to operation characteristics of mine hoist,a back-to-back modular multilevel converter composed of modular multilevel rectifier and modular multilevel inverter was used for control of mine hoist.In view of current research on pre-charging control for modular multi-level inverter through DC side was less,apre-charging control strategy of modular multilevel inverter was proposed.Charging state of sub-module is controlled by controlling charging current,so that capacitor of the sub-module can be charged to meet voltage requirement of the modular multilevel converter in stable operation.Meanwhile,charging current and overvoltage generated in charging process are limited to safe range and charging time is the shortest.The simulation results verify effectiveness of the control strategy.
作者
朱奇先
齐刚
魏永武
王兴贵
ZHU Qixian;QI Gang;WEI Yongwu;WANG Xinggui(State Key Laboratory of Large Electric Drive System and Equipment Technology,Tianshui 741020,China;College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《工矿自动化》
北大核心
2019年第2期60-64,共5页
Journal Of Mine Automation
基金
大型电气传动系统与装备技术国家重点实验室资助项目(SKLLDJ042016017)
