基于单相H桥型MMC高速铁路新型同相供电系统  

A New Type of Co-phase Power Supply System for High-speed Railway Based on Single Phase H-bridge Type MMC

作　　者：陈莉[1] 杨飏[1] 陈剑 CHEN Li;YANG Yang;CHEN Jian

机构地区：[1]南京铁道职业技术学院 [2]中铁工程设计咨询集团有限公司

出　　处：《电气化铁道》2022年第3期38-42,共5页Electric Railway

基　　金：“青蓝工程”优秀青年骨干教师培养项目(RCQL20203);南京铁道职业技术学院科研项目(YZ210001)。

摘　　要：为解决我国高铁V型牵引变电所的以负序为主的电能质量问题,本文提出一种基于单相H桥模块化多电平换流器(SPH-MMC)的新型同相牵引供电系统结构,由V型接线变压器(TT)和统一潮流控制器(UPFC)组成。建立了该新型同相供电系统数学模型,分析了其拓扑结构工作原理;基于平衡补偿原理,提出了一种改进后的有功电流分离的电流检测方法及其控制策略,包括系统级控制指令电流的生成、直流电容电压均衡控制、基于PR调节器的二倍频环流抑制和子模块故障容错控制;最后通过实例验证了该控制策略的有效性和系统的性能。结果表明,与传统的同相供电系统相比,基于SPH-MMC的高速铁路新型同相供电系统能够很好地实现电能质量补偿。In order to solve the power quality problem caused by the V-type traction substation adopted in China’s high-speed railway, the paper proposes a new co-phase traction power supply system structure based on single phase H-bridge modular multilevel converter(SPH-MMC). The structure consists of V-type wiring transformer(TT) and unified power flow controller(UPFC). Firstly, the mathematical model of the new co-phase power supply system is established, and the working principle of the topology structure is analyzed. Secondly, an improved active current separation current inspection method and its control strategy are proposed based on the principle of balance compensation. It includes system level control command current generation, DC capacitive voltage balance control,frequency double loop current suppression based on PR modulator, fault tolerance control of submodule block. Finally,an example is given to verify the effectiveness of the control strategy and the performance of the system. The results show that the new co-phase power supply system of high-speed railway based on SPH-MMC can well realize power quality compensation compared with the traditional co-phase power supply system.

关 键 词：新型同相供电系统 V型接线变压器 模块化多电平变流器 潮流控制器 有功电流分离 

分 类 号：U223.5[交通运输工程—道路与铁道工程]