中国电机工程学报2024，Vol.44Issue(5)：1932-1947,中插23,17.DOI:10.13334/j.0258-8013.pcsee.223426
高速磁浮背靠背三电平ANPC变流器中点电压偏移机理与协同控制策略
Neutral Point Voltage Offset Mechanism and Cooperative Control Strategy of High-speed Maglev Back-to-back Three-level ANPC Converter
摘要
Abstract
The 24 MVA back-to-back three-level active neutral point clamped(3L-ANPC)converter is adopted for high-speed maglev.The DC bus is shared by two rectifiers and two inverters.In this paper,under various power factors,the offset mechanisms of neutral point voltage(NPV)at the rectifier side and inverter side are analyzed.The specific effects on the NPV of different voltage vectors are also analyzed.On this basis,to obtain the controllable area of the NPV when the modulation ratio and power factor both change,accordingly,the NPV offset models are established for the parallel and series modes of high-speed maglev inverters.To ensure the NPV balance in the full speed range,a cooperative control strategy based on shifting the modulation wave is proposed.To reduce the influence of the rectifier power factor and modulation ratio on the NPV,carrier-based pulse width modulation(CBPWM)with half-wave symmetry of phase voltage is adopted.It is proven that it has the self-balancing ability of the NPV.Simulation and hardware-in-the-loop experiments show that the proposed strategy has the advantages of a shorter time for the NPV to return to equilibrium,a larger controllable range,etc.Moreover,the NPV balance can be guaranteed for high-speed maglev operations at full speed.关键词
高速磁浮/背靠背三电平有源中点钳位变流器/共直流母线/中点电压平衡/载波脉宽调制/协同控制Key words
high-speed maglev train/back-to-back three-level active neutral point clamped(3L-ANPC)converter/common DC bus/neutral point voltage(NPV)balance/carrier-based pulse width modulation(CBPWM)/cooperative control分类
信息技术与安全科学引用本文复制引用
赵牧天,葛琼璇,朱进权,赵鲁,张波,王珂..高速磁浮背靠背三电平ANPC变流器中点电压偏移机理与协同控制策略[J].中国电机工程学报,2024,44(5):1932-1947,中插23,17.基金项目
国家重点研发计划项目(2016YFB1200602-20) （2016YFB1200602-20）
国家自然科学基金项目(51907188). National Key R&D Program of China(2016YFB1200602-20) （51907188）
National Natural Science Foundation of China(51907188). （51907188）
