摘要
在系统启动及负载突变时,基于PI控制算法的PWM整流器难以获得良好的动态性能,对电流内环参考指令跟踪调节速度慢,且存在静态误差等问题,提出一种基于电流内环的准比例谐振(QPR)控制器,同时电压外环采用具有较强鲁棒性和动态性能的滑模控制器,基于滑模控制电压外环降低电压外环PI控制器对电流内环控制精准性的影响,提高整流器对直流电压的响应速度,将两者结合来提高三相PWM整流器的稳态性能及负载扰动时动态性能和鲁棒性能;为简化滤波电感的设计,采用具有固定开关频率的空间矢量调制技术。最后,搭建仿真模型和基于TMS320F2812核心控制板的10kW整流器实验平台进行验证,实验结果表明,滑模-QPR控制策略具有更好的动态性能和鲁棒性能。
When the system starts up and the load begins to step change,it is difficult for the PWM rectifier based on PI control to get better dynamic performance,the inner-loop current tracking speed is slow and has static error.Aiming to the problem,an effective QPR control for current inner loop was proposed and a sliding-mode control was introduced to reduce the accuracy effect of current inner loop control caused by the outer loop,increase response speed and enhance the anti-load disturbance.Moreover,the two methods were combined to improve the steady-state and dynamic performance for three-phase PWM rectifier with load disturbing.At last,in order to simplify the design of the filter inductor,a space vector modulation technology with a fixed switching frequency was adopted.Finally,a simulation model and a 10 kW experimental platform based on the TMS320F2812 were built to validate feasible and effective,and the results show that the sliding mode QPR control strategy has better robust and dynamic performance.
作者
王良凯
马辉
危伟
王书征
WANG Liangkai;MA Hui;WEI Wei;WANG Shuzheng(College of Electrical Engineering & New Energy,China Three Gorges University,Yichang 443002,Hubei,China;Jiangsu Collaborative Innovation Centerfor Smart Distribution Network,Nanjing 211167,Jiangsu,China)
出处
《电气传动》
北大核心
2019年第7期54-59,共6页
Electric Drive
基金
国家自然科学基金项目(51707103)
江苏省配电网智能技术与装备协同创新中心(XTCX201710)
湖北省教育厅优秀中青年科技创新团队项目(T201504)
关键词
PWM整流器
准比例谐振控制
滑模控制
PWM rectifier
quasi proportional resonan(t QPR)control
sliding mode control
