A Two-level Energy Management Model for Railway Substation with POC and Energy Storage

A novel topology of railway traction substation integrated power optimization controller (POC), hybrid energy storage system (HESS) and photovoltaic (PV) generation system is studied in this paper. The railway station energy management strategy is divided into high-level and low-level, in which high-level optimizes energy flow of substation, and the low-level controls power redistribution of HESS. The two-level energy optimization problem is expressed as mixed integer linear programming (MILP), the actual operation error of electric multiple unit (EMU) and PV is also took into consideration. A real case is verified that the proposed method can reduce railway operating cost and improve usage efficiency of regenerative braking (RB) and PV.