摘要
针对三电平中点钳位型(NPC)逆变器工作时存在的中点电位不平衡问题,提出了一种改进的三电平NPC逆变器中点平衡模型预测控制算法(INB-MPC)。所提方法采用无权重系数的两级式电压矢量选择机制,删除了NPC逆变器中共模电压较大的空间矢量,并通过构造对中点电位无影响的虚拟冗余短矢量进行中点电压的平衡控制。相较传统低共模电压算法,所提出的算法有着更低的中点纹波与更小的计算负担。仿真结果表明,所提算法降低了中点电压纹波,同时实现了参考电流的跟踪与共模电压降低,且系统具有良好的动、静态性能。
To solve the problem of neutral point voltage imbalance when the three-level neutral point clamped(NPC)inverter works,an improved neutral balance model predictive control(INB-MPC)algorithm was proposed.The proposed method used a two-stage voltage vector selection method with no weighting factors,deleted the space vector with large common-mode voltage,and constructed redundant virtual short vectors that has no effect on the neutral point to balance the neutral point voltage.Compared with the traditional low common mode voltage algorithm,the proposed algorithm has lower midpoint ripple and less computational burden.The simulation results show that the proposed algorithm reduce the neutral point voltage ripple,and can realize the tracking of reference current and the reduction of common-mode voltage,and the system has good dynamic and static performance.
作者
汪以涵
冯传欣
金涛
WANG Yihan;FENG Chuanxin;JIN Tao(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,Fujian,China)
出处
《电气传动》
2025年第9期52-60,共9页
Electric Drive
基金
国家自然科学基金面上项目(52377088)
中央引导地方科技发展项目(2021L3005)。
关键词
三电平NPC逆变器
模型预测控制
中点电压
虚拟电压矢量
共模电压
three-level neutral point clamped(NPC)inverter
model predictive control(MPC)
neutral point voltage
virtual voltage vector
common-mode voltage(CMV)
