针对既有电气化铁路分段、分相式供电结构导致的列车过分相速度损失、再生制动能量利用率低等问题，提出一种分区所多功能潮流控制系统(multi-functional power flow control system for section post，SP-MPFC)及其控制策略，旨在充分利用变流设备容量，兼顾实现分区所处列车柔性过分相、牵引网末端电压稳定与再生制动能量转移利用。首先，介绍分区所多功能潮流控制系统的拓扑结构。然后，详细分析了柔性过分相、牵引网末端电压稳定与再生制动能量转移利用3种功能的实现原理。在此基础上，提出分区所多功能潮流控制系统分层控制策略，其中能量管理层计算系统内各个变流器的有功/无功输出功率参考值，设备层协同控制多个变流器快速跟踪各自功率参考值。最后，通过仿真验证所提系统结构与控制策略的有效性。
A Novel Multi-functional Power Flow Control System and Its Control Strategy in Section Post for Electrified Railway
The particular split-phase traction power supply system of electrified railways faces the challenges of low regenerative braking energy utilization and speed loss during passing phase-separation.To address these issues,this paper proposes a multi-functional power flow control system for section post(SP-MPFC)and its control strategy.This system aims to fully use the installation capacity of converters to achieve flexible uninterrupted phase-separation passing,traction network terminal voltage stability,and regenerative braking energy exchange.First,the structure of the proposed SP-MPFC is introduced,and the working principles of the different functions are analyzed in detail.On this basis,a hierarchical control strategy is proposed for SP-MPFC.The energy management layer determines the active and reactive power output references for each converter.The converter control layer coordinates the multiple converters to track the received power references quickly and accurately.Finally,simulations verify the effectiveness of the proposed SP-MPFC and control strategy.
electrified railwaysection postflexible phase-separation passinggrid voltage stabilityregenerative braking energy
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