T型三电平逆变器非对称矢量脉冲宽度调制相电流重构策略  

RECONSTRUCTION STRATEGY OFASYMMETRIC VECTOR PULSE WIDTH MODULATION PHASE CURRENT OF T-TYPE THREE-LEVEL INVERTER

作　　者：申永鹏 刘洋 王帅兵 齐文雷 王延峰 Shen Yongpeng;Liu Yang;Wang Shuaibing;Qi Wenlei;Wang Yanfeng(College of Electrical and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;State Grid Yili Yihe Power Supply Co.,Ltd.,Yining 835000,China)

机构地区：[1]郑州轻工业大学电气信息工程学院,郑州450002 [2]国网伊犁伊河供电有限责任公司,伊宁835000

出　　处：《太阳能学报》2024年第4期450-459,共10页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金面上项目(62273313);河南省高校科技创新人才支持计划(24HASTIT046);河南省青年骨干教师培养计划项目(2021GGJS089)。

摘　　要：针对T型三电平逆变器中点电流单传感器传统相电流重构方法存在不可观测区的问题,分析中点电流采样过程中不可观测区的存在机理,提出非对称矢量脉冲宽度调制相电流重构策略。通过移位PWM波延长基本电压矢量的作用时间,消除不可观测区,实现相电流重构。实验结果表明,所提方法的电流重构误差低于2.2%,输出相电流畸变率低于3.48%。Aiming at the unobservable region in traditional phase current reconstruction method of neutral current single sensor of T-type three-level inverter,the existence mechanism of the unobservable region of the neutral current sampling proce sses is analyzed firstly,the asymmetric vector pulse width modulation phase current reconstruction strategy is proposed.Through shifting the pulse width modulation wave,eliminate unobservation regions,and realize phase current reconstruction.The experimental results show that the phase current restructuring error proposed method is less than 2.2%,and the THD of three phase current is less than 3.48%.

关 键 词：脉冲调制 相移 信号采样 相电流重构 中点电流 不可观测区 

分 类 号：TM341[电气工程—电机]