To improve the traction power supply system's emergency support and self-rescue ability

the local traction self-healing-based emergency power system with photovoltaic-energy storage and its control method are proposed. The collaborative response architecture with a ground emergency link and the onboard emergency link is constructed first. On this basis

a hierarchical emergency operation control method is designed. A fault-driven emergency energy management strategy is established in the system layer to match different energy allocation links. In the device layer

the emergency island control strategy based on proportional resonant-dual mode switching and the active disturbance rejection voltage control is adopted for core converters

which can flexibly switch three emergency response control forms to quickly restore the traction power state of the fault section and support the system dynamic stability under uncertain factors. Finally

through typical scenarios

scheme comparison

and control performance analysis

the traction emergency response characteristics and operation adaptability of the proposed scheme are verified. The results show that it can provide the emergency source independent of the external power grid and substation for the traction power supply system and realize the section state self-healing and orderly energy management to support the emergency self-traction behavior of trains

which greatly reduces the risk loss under extreme events.