摘要
中点电位平衡对二极管箝位三电平逆变器而言非常重要。在此深入分析了空间矢量调制中引起中点电位偏移的原因,提出了基于参数自整定模糊控制的中点平衡控制策略。该算法对三电平逆变器中点电位这一非线性时变对象有较好的适应性和鲁棒性,其静态及动态误差都能控制在较低范围,达到中点电位平衡的效果。仿真和实验结果证明了该算法的正确性和有效性。
A significant problem with diode neutral point clamped three-level inverter is the fluctuation in the neutral-point voltage.The causes of the neutral point potential unbalance based on space vector pulse width modulation are analyzed.And then a strategy based on parameters self-tuning fuzzy logic control is presented which could solve the problems of some commonly used control strategies.For time-variable nonlinear system,this algorithm has better ro-bustness and adaptability.Also there are small static and dynamic error in controlling of the neutral point voltage.The effectiveness of the proposed control approach is verified by simulation and experimental results.
出处
《电力电子技术》
CSCD
北大核心
2011年第1期12-14,共3页
Power Electronics
关键词
三电平逆变器
空间矢量调制
中点平衡
three-level inverter
space vector pulse width modulation
neutral point potential balance
