27电平新型铁路功率调节器及其负序补偿方法  

Twenty-seven Level Railway Power Conditioner and Its Negative Sequence Compensation Method

作　　者：卜健怡 张长征[1] BU Jianyi;ZHANG Changzheng(Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei Univ.of Tech.,Wuhan 430068,China)

机构地区：[1]湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,湖北武汉430068

出　　处：《湖北工业大学学报》2022年第5期17-22,共6页Journal of Hubei University of Technology

基　　金：湖北省技术创新专项重大项目(2019AAA018)。

摘　　要：针对电气化铁路的负序问题,提出一种基于电压源和电流源串联的新型多电平铁路功率调节器,其中电压源由混合级联27电平变换器构成,电流源由单相三电平变换器构成,电压源中承担主体功率的H桥的开关频率仅50 Hz,因此系统损耗小,也有利于提高开关器件在大功率补偿时的安全性。研究了系统的结构和工作原理,考虑到传统检测方法存在波动问题,基于移相构造的思想,提出稳态波动小的负序补偿电流检测新方法。仿真验证了新方案和新方法的有效性。Aiming at the negative sequence problem of electrified railway, a multilevel railway power conditioner based on series connection of voltage source and current source was proposed. The voltage source is composed of hybrid cascade 27 level converter and the current source is composed of a single-phase three-level converter. The switching frequency of the H-bridge bearing the main power in the voltage source is only 50 Hz, so the system loss is small. It also helps to improve the safety of switching devices in high power compensation. This paper studied the structure and working principle of the system. Considering the fluctuation of traditional detection methods, a negative sequence compensation current detection method with good steady state performance was proposed through the phase shifting structure. Simulation results showed the effectiveness of the new scheme and method.

关 键 词：铁路 铁路功率调节器 多电平 负序 

分 类 号：U223[交通运输工程—道路与铁道工程] TM922[电气工程—电力电子与电力传动]