摘要
针对T型三电平逆变器的特点,本文提出了基于T型三电平新型电流预测控制方法。该算法是基于模型预测控制,对三相T型三电平逆变器的27个矢量进行在线计算,使价值函数最小的电压矢量应用到下一个采样周期。能够快速实现α和β轴给定电流的快速跟踪、中点电位平衡以及最少的开关损耗,通过预测控制能够提高系统的动态响应速度。实验验证了所提方法的正确性。
According to the characteristics of T- type three- level inverter, this paper proposed currentpredictive control for T-type three-level inverter. The algorithm is based on model predictive control.The method calculates the 27 vectors online. The voltage vector will be applied in the next samplingperiod which makes the smallest value function. This algorithm can quickly achieve the fast track of agiven current alpha and beta axis, neutral voltage balance and the fewest switch loss. The predictivecontrol can improve the speed of dynamic response of the system. Simulation and experiment validate thecorrectness of the proposed method.
出处
《科技通报》
北大核心
2016年第6期76-79,83,共5页
Bulletin of Science and Technology
基金
河南省教育厅高等学校重点科研项目(15A470019)
河南省科技厅计划项目(162102210301)
关键词
T型三电平
并网逆变器
预测控制
中点平衡
电流跟踪
T-type three-level
grid-inverter
predictive control
NP balance
current tracking
