城市轨道交通制动能量分步式协同吸收方法

Method for Stepped Synergistic Absorption of Braking Energy of Urban Rail Transit

城市轨道交通制动能量吸收利用是业内较为关注的一个重要问题,利用超级电容、飞轮等储能方式进行能量吸收是一种高效的方式,对外部环境影响较小。为了使各变电所的储能装置能够更好地回收制动能量,本文提出将牵引变电所等效为电压源和虚拟阻抗,通过配置虚拟阻抗实现列车制动工况下制动电流在各邻近牵引变电所制动能量吸收装置之间均衡分配的方案。在电压和电阻均不确定的情况下,多变量的在线求解很难通过传统方法实现,通过对电路拓扑的等效和化简并引入遗传算法,实现了电压和电阻的同时求解,并基于4种不同情况对其进行分析和验证。

The braking energy absorption for urban rail transit is an important issue with more attentions from the industry of urban rail transit,energy absorption by means of energy storage of super-capacitor and fly wheel is a high effective method and is not liable to induce adverse effect to the peripheral environment.In order to better recycle the braking energy by energy storage devices in substation,the paper puts forward a scheme by which the traction substation is being equivalent to the power source and virtual impedance,then the balanced distribution of braking current among the braking energy absorption devices of adjacent traction substations is realized by configuration of the virtual impedance.