摘要
提出一种混合控制策略,实现T型三电平整流器的稳定运行。该控制方法包括内环和外环控制,外环采用PI控制器实现直流侧电压稳定和无功功率获取;内环采用有限集模型预测控制实现输入电流控制,并针对T型三电平整流器存在的中点不平衡问题,通过调节矢量作用时间实现中点电位平衡控制。提出的混合控制方法具有动态响应快、较少的PI参数、计算量小、不需要调制策略等特点。最后通过仿真和实验验证了所提方法的正确性和有效性。
The paper proposes a hybrid control strategy to achieve stable operation of the T-type three-level rectifier. The control method includes inner loop and outer loop,the outer loop adopts PI controller to realize DC side voltage stability and reactive power acquisition,and the inner loop adopts finite set model predictive control to realize input current control. The problem of midpoint imbalance of T type three-level rectifier is solved by adjusting the vector action time.The hybrid control method proposed in this paper has the following innovations:① fast dynamic response;② less PI parameters;③ less calculation;④ no need of adjusting modulation stratege. Finally,the correctness and effectiveness of the proposed method are verified by simulation and experiment.
作者
贺娅莉
戴成梅
支联合
郭艳花
HE Yali;DAI Chengmei;ZHI Lianhe;GUO Yanhua(School of Mechanical and Electrical Engineering, Zhoukou Normal University, Zhoukou 466000, Henan, China)
出处
《实验室研究与探索》
CAS
北大核心
2019年第4期29-32,66,共5页
Research and Exploration In Laboratory
基金
周口师范学院2017年度校本项目(zknub2201709)
关键词
三电平整流器
预测控制
中点电压平衡
混合控制方法
three-level rectifiers
predictive control
midpoint voltage balance
hybrid control method
