24脉波整流器无法回馈列车再生制动能量,从而导致直流母线电压的急剧升高和能量的浪费,而地铁牵引变电站有限的预留空间无法容纳单独的能量反馈装置.为此,本文作者提出了一种混合型能馈式牵引供电装置,该装置由12脉波整流机组和PWM整流器组成,PWM整流器在双向变流的同时还对12脉波整流器进行谐波补偿,该装置兼具了两者的优点:能量双向流动、直流电压可控、谐波含量低、过负荷能力强和设备空间需求小.本文对这种牵引供电装置的工作原理和控制策略进行了分析,并通过仿真和现场实验,对其实际效果进行了验证.%A hybrid traction power system with energy feedback, which is consist of 12-pulse rectifier and PWM converter, is proposed in this paper. The adventures of energy feedback, controllable DC voltage, low AC current THD, enough overload capacity and less space demand are achieved. The AC current distribution and DC output character of the 12-pulse traction rectifiers are analyzed. The functions of PWM converter which includes rectifier, inverter and APF are described. And its control strategy is also shown in detail. Finally, the simulation and experiments are done to verify these theoretical hypothesis and function description.
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