一种模块化地铁再生制动能量回馈系统及环流抑制策略

针对地铁再生制动能量回馈系统的需求,文中采用了一种带快速熔断器的模块化串并联能馈拓扑。该拓扑降低了设备的成本,提高了设备的可靠性。针对模块并联环流问题,定量分析了调制波和载波对环流的影响,采用每个逆变器单元独立电流内控制策略和载波同步技术来抑制并联模块的环流。试验结果表明,文中所设计的基于多模块串并联的地铁列车再生制动能量回馈装置可以实现交直流侧直接并联,且并联逆变器的电流偏差小于1%,串联逆变器的直流电压偏差小于1%。

A Modular Metro Braking Energy Feedback System and Circulation Suppression Strategy

In the light of the demand for regenerative braking energy feedback system for subway and subway,a modular series-parallel energy-fed topology with fast fuses is adopted.This topology reduces the cost of the device,solves the problem of insufficient IGBT current,and improves the reliability of the device.In this paper,the influence of the modulated wave signal and the carrier signal on the circulation are quantitatively analyzed.The internal current control strategy and the carrier synchronization technique are used to suppress the circulation of the parallel module.The test results show that the direct parallel connection of AC and DC side can be realized through the regenerative braking energy feedback device based on multi module series parallel connection and the current deviation of the parallel inverter is less than 1%,the DC voltage deviation of the series inverter is less than 1%.