城市轨道交通混合储能系统无源性协同控制方法  

Collaborative passivity-based control method for hybrid energy storage systems in urban rail transit

作　　者：时珊珊 王凯 张宇 张开宇 张珂宁 王育飞 王雅妮 SHI Shanshan;WANG Kai;ZHANG Yu;ZHANG Kaiyu;ZHANG Kening;WANG Yufei;WANG Yani(State Grid Shanghai Municipal Electric Power Company,Shanghai 200031,China;Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]国网上海市电力公司,上海200031 [2]上海电力大学,上海200090

出　　处：《储能科学与技术》2024年第11期4040-4052,共13页Energy Storage Science and Technology

基　　金：国家自然科学基金(52207025);国网上海市电力公司项目(B3094023000W)。

摘　　要：为解决城市轨道交通列车频繁启停引起的牵引网电压波动问题,针对由超级电容和电池组成的混合储能系统,本文提出了基于集合经验模态分解的无源性协同控制方法,从而平抑网侧电压波动,实现再生制动能量回收,降低城市轨道交通能耗。利用集合经验模态分解方法求取混合储能系统多个本征模态函数,对每个本征模态函数瞬时频率曲线进行Hilbert变换,精确重构高频、低频分量,提升超级电容和电池功率期望轨迹精度。针对混合储能系统多变量、强耦合、非线性特性,在dq坐标下建立双线性模型,实现状态变量与控制变量同步线性变换,设计全局渐近稳定的无源性控制器,使系统存在外部不确定性扰动情形时始终保持超级电容和锂电池功率期望轨迹同步快速跟踪,达成协同控制目标。基于MATLAB的仿真结果表明,所提方法既实现了超级电容和锂电池长寿命协同运行,又能满足城市轨道交通再生制动能量回收利用需求,具有响应快速、稳定性好的特点。To regulate voltage fluctuations in urban rail transit traction systems caused by the frequent acceleration and deceleration of trains,this study proposes a passivity-based collaborative control method utilizing ensemble empirical mode decomposition for a hybrid energy storage system(HESS)composed of supercapacitors and batteries.This method enables the recovery of regenerative braking energy and reduces the overall energy consumption of urban rail transit systems.The ensemble empirical mode decomposition technique is employed to extract multiple intrinsic mode functions of the HESS,allowing precise reconstruction of high-frequency and low-frequency components through the instantaneous frequency curve of each intrinsic mode function processed by the Hilbert transform,thereby enhancing the power trajectory accuracy for both supercapacitors and batteries.To address the multi-variable,strongly coupled,and nonlinear nature of the HESS,a bilinear model is developed in dq coordinates,facilitating synchronous linear transformation of state and control variables.A globally asymptotically stable passivity-based controller is then proposed to ensure synchronized and rapid tracking of desired power trajectories,achieving collaborative control even under external uncertainties.Simulation results using MATLAB demonstrate that the proposed method ensures long-term cooperative operation of supercapacitors and batteries,effectively meeting the demands for regenerative braking energy recovery and utilization in urban rail transit.The proposed approach offers advantages such as rapid response and robust stability.

关 键 词：城市轨道交通 混合储能系统 集合经验模态分解 无源性控制 

分 类 号：TM912[电气工程—电力电子与电力传动]