地铁再生制动能量回馈装置软并网技术研究  

Soft Cut-in Method for Metro Regenerative Braking Energy Feedback Equipment

作　　者：李洁 郑伊飞 郑月宾 唐圣辉 桑福环 

机构地区：[1]郑州市轨道交通有限公司,郑州工程师450000 [2]西安许继电力电子技术有限公司,西安710075

出　　处：《城市轨道交通研究》2015年第10期89-92,97,共5页Urban Mass Transit

摘　　要：地铁再生制动能量回馈装置在并网时会产生很大的冲击电流,对装置和电网都不利。传统电阻辅助软启方式具有局限性。介绍了一种新的软并网方法:在并网前通过控制三相逆变桥的输出,使交流滤波电容上以斜坡递增的形式逐步建立起与电网同幅、同频、同相的交流电压,从而大幅降低并网时的电流冲击。利用MATLAB/Simulink软件对该软并网方法进行了仿真验证,并在一台1.2 MW地铁再生制动能量回馈装置上进行了软并网试验。仿真和试验结果均证明了该方法的有效性。Metro regenerative braking energy feedback e- quipment produces a high surge current when connected to the grid, which has a negative effect on the equipment it- self and the grid. The conventional cut - in method based on soft - starting resistance has its limitation, so a soft cut- in method is proposed in this paper. Before connecting to the grid, the equipment would control the output of the three-phase inverter, and the filter capacitor would incre- mentally generate an AC voltage with the same amplitude, frequency and phase as the grid. Thus, the current impact on grid connection could be significantly reduced. The pro- posed method is simulated by using MATLAB/Simulink, and the soft cut-in experiment is carried out based on 1. 2MW metro regenerative braking energy feedback equip- ment. Simulation and experimental results demonstrate the validity of the proposed method.

关 键 词：再生制动 逆变回馈 软并网 电流冲击 

分 类 号：U270.35[机械工程—车辆工程]