基于牵引网电压和空载电压的多储能系统区间能量管理策略  

Interval Energy Management Strategy for Multiple Energy Storage Systems Based on Traction Network Voltage and No-Load Voltage

作　　者：钟志宏[1] 李炎 米佳雨 林飞[1] 杨中平[1] Zhong Zhihong;Li Yan;Mi Jiayu;Lin Fei;Yang Zhongping(School of Electrical Engineering Beijing Jiaotong University,Beijing 100044 China)

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《电工技术学报》2024年第15期4583-4598,共16页Transactions of China Electrotechnical Society

摘　　要：近年来,随着“双碳”政策的推动,储能技术在城市轨道交通中的应用愈发广泛,呈现出点到线的发展趋势。当一条线路中有多站安装储能装置时,想要进一步提升储能系统的节能效果,必须要解决不同站储能装置的充放电策略个性化设计,以及多储能间协调控制这两个问题。因此,该文提出一种基于实时牵引网电压和空载电压的多储能系统区间能量管理策略。该策略基于多个牵引变电站的空载电压和牵引网电压,对能量管理区间内的列车状态和列车剩余功率进行辨识,基于此计算区间内储能装置的充放电阈值基准值初值及基准值变化的斜率。为进一步提升节能和稳压效果,该策略基于充放电周期、牵引网电压超限频次及储能系统的荷电状态(SOC)等参数,对基准值及其更新斜率进行实时校正。该文在北京地铁的实际线路中进行了验证,结果表明,相较于基于本站空载电压的能量管理策略,提出的策略在降低系统能耗和稳定牵引网电压方面都具有显著的改善效果。In recent years,with the promotion of the dual carbon policy,the application of energy storage technology in urban rail transit has become increasingly widespread,showing a trend of point-to-line development.When multiple stations are installed with energy storage devices on a line,charging/discharging strategy design for different station energy storage devices and the coordination and control for multiple energy storage systems are necessary.This paper analyzes the relationship between traction network voltage,train status,and residual power of trains under no-load voltage and departure interval conditions based on the measured traction network voltage and 10 kV transformer output voltage.A distributed interval energy management strategy is proposed,dividing the entire line into several energy management intervals.The parameters of the energy management equipment within the interval are dynamically adjusted by identifying the train status and residual power within the interval.Firstly,the no-load voltage of the traction substation is identified online based on the output voltage of the 10 kV transformer.The real-time status and residual power of the trains in the management section are identified with the identified no-load voltage and the traction network voltage of the substations in the section.Based on the real-time identified residual power,the benchmark value of the charging and discharging threshold of the energy storage system in the section and the initial slope of the threshold variation are determined.This strategy introduces an online correction mechanism to further optimize the effects of energy conservation and voltage stabilization according to parameters such as charging and discharging cycles,frequency of traction network voltage exceeding 900 V,and the state of charge of the energy storage system.It corrects the benchmark values and updates the slopes of the charging and discharging thresholds for multiple energy storage systems within the interval.The proposed strategy has been verified on tw

关 键 词：城轨交通 空载电压 多储能 能量管理 协调控制 

分 类 号：U239.5[交通运输工程—道路与铁道工程]