相邻变电所间再生制动能量转移利用技术研究与应用

Research and Application of Transfer and Utilization Technology for Regenerative Braking Energy Between Adjacent Substations

为解决2个相邻变电所在同一时刻分别从电网获取电能和向电网反送电能问题,对相邻变电所间再生制动能量转移利用技术进行研究和工程验证。分析再生制动能量在相邻变电所间转移利用的工作原理,提出一种基于信息流和能量流协同控制的分布式系统设计方案。通过直接高效转移利用再生制动能量,实现铁路节能节支。制定计及牵引负荷需求、再生制动能量和系统额定功率等多约束条件的转移利用策略,建立一种由能量管理层和变流控制层组成的分层控制架构,研究功率转移控制算法,并在陇海铁路开展示范应用。现场运行结果证明,系统方案设计合理,控制策略正确可行,节能效果良好,日均节约电量达14.5 MW·h。

In order to solve the problem that two adjacent substations obtain power from the power grid and send power back to the power grid at the same time, the transfer and utilization technology for regenerative braking energy between adjacent substations is studied and applied. The paper analyzes the working principle of the transfer and utilization for regenerative braking energy between adjacent substations, and a distributed system scheme based on the cooperative control of information flow and energy flow is proposed to realize energy and cost saving by directly and efficiently transfering and utilizating regenerative braking energy. It focuse on a energy transfer and utilization strategy under multiple constraints involving traction load demand, regenerative braking energyand system rated power. A hierarchical control architecture consisting of an energy management layer and a variable flow control layer. An algorithm for the power transfer and control. The scheme is carried out on Lianyungang-Lanzhou Raiway. Application results prove that the system design is reasonable, the control strategy is correct and feasible, and the energy saving effect is good, with an average daily power saving of reaches 14.5 MW·h.