摘要
在采用储能装置和能馈系统协同吸收地铁回馈能量时,为优化能馈系统变流器容量与超级电容容量的利用效率,在此提出了一种通过动态调节能馈系统最大吸收功率来对储能装置和能馈系统吸收的回馈能量进行最优分配的方案。该方案根据地铁制动时的功率曲线以及运动学的基本规律,推导出地铁制动时间与制动初速度之间的关系,在综合考虑储能装置和能馈系统的功率特性差异以及回收单位回馈能量成本差异的基础上,建立了地铁制动时的最优能量分配目标函数,通过数学分析得出能馈系统最大吸收功率与地铁制动回馈的峰值功率之间的关系。在地铁制动时,通过采样列车峰值功率来动态调节能馈系统最大吸收功率,以达到最佳的回馈能量吸收效果。最后,通过仿真和实验验证了所提方案的有效性。
In order to optimize the capacity utilization efficiency of energy feedback system and super capacitor which are used to synergistically absorb regenerative energy in urban rail transit, an optimal energy allocation scheme is pro posed. The program achieves the optimal energy distribution by dynamically adjusting the maximum absorption power of the energy feedback system.Based on the power curve of train braking and the basic law of kinematics, the relationship between the braking time and the initial braking speed is deduced.After a comprehensive consideration of the differences between energy storage devices and energy feedback systems in the power characteristics and in the costs of recovering un让 energy, the optimal energy distribution objective function for train braking is established. Through mathematical analysis, the relationship between the maximum power of energy feedback system and the peak power of the train braking can be obtained.During train braking, the maximum power of the energy feedback system is dynamically adjusted by sampling the peak power of the train to achieve the best feedback energy absorption effect. Finally ,the simulation and field experiment results verify the effectiveness of the proposed program.
作者
黄科元
钟树人
张其松
张铁军
HUANG Ke-yuan;ZHONG Shu-ren;ZHANG Qi-song;ZHANG Tie-jun(Institute of Electrical and Information Engineering,Hunan University 3 Changsha 410082,China)
出处
《电力电子技术》
CSCD
北大核心
2019年第8期23-27,共5页
Power Electronics
基金
湖南省战略性新兴产业科技攻关类项目(2016GK4027)~~
关键词
城轨交通
再生能量
超级电容
urban rail transit
regenerative energy
supercapacitor
