三相PWM整流器离散空间矢量无模型预测电流控制策略
Model-free predictive current control of three-phase PWM rectifier based on discrete space vector
胡存刚 1尹政 2张悦 3罗魁 3芮涛 4冯壮壮2
作者信息
- 1. 中国电力科学研究院有限公司 新能源与储能运行控制国家重点实验室,北京 100192;安徽大学 电气工程与自动化学院,安徽 合肥 230601
- 2. 安徽大学 电气工程与自动化学院,安徽 合肥 230601
- 3. 中国电力科学研究院有限公司 新能源与储能运行控制国家重点实验室,北京 100192
- 4. 安徽大学 互联网学院,安徽 合肥 230601
- 折叠
摘要
针对PWM整流器模型预测控制对系数参数准确性高度依赖的问题,提出一种基于离散空间矢量的无模型预测电流控制(MFPCC)策略.该策略通过矢量合成,在每个控制周期应用两个基本矢量,提高了预测电流的准确性;通过峰谷采样,分别测量并存储上一控制周期两个基本矢量作用下的电流梯度;并建立电流梯度方程,从而根据应用矢量的电流梯度进一步更新剩余6 个未应用矢量的电流梯度,结合当前时刻的电流采样值,实现未来时刻的电流预测,得到下一时刻最优的虚拟矢量.该方法不依赖于任何系统参数,且消除了传统MFPCC策略中电流梯度更新停滞现象,降低了输出电流谐波.最后,通过实验和仿真验证了所提方法的有效性和优越性.
Abstract
Aiming at the problem that the model predictive control of PWM rectifier is highly dependent on the accuracy of system parameters,a model-free predictive current control(MFPCC)strategy based on discrete space vector was proposed.Through vector synthesis,two basic vectors were applied in each control period to improve the accuracy of current prediction;Based on peak and valley sampling,the cur-rent gradient of the two applied basic vectors in the previous control period was measured and stored re-spectively;And by establishing the current gradient equations,so as to further update the current gradi-ent of the remaining 6 non-applied vectors according to the current gradient of the applied vector.The proposed method has strong robustness,and eliminates the stagnation effect in conventional MFPCC,and reduce current harmonics.Finally,effectiveness and advantages of the proposed method are verified by experiment and simulation.
关键词
PWM整流器/无模型预测电流控制/离散空间矢量/电流梯度更新/停滞现象Key words
PWM rectifier/model-free predictive current control/discrete space vector/current gradient updating/stagnation phenomenon引用本文复制引用
基金项目
新能源与储能运行控制国家重点实验室开放基金(NYB51202201697)
出版年
2024
NETL
NSTL
万方数据