The flexible traction power supply system (FTPSS) integrates back-to-back converter, and hybrid energy storage (HESS) photovoltaic (PV) generation will be an important part of the smart railway. FTPSS not only cancels neutral zone but also facilitates utilization regenerative braking (RB) renewable energy, random fluctuation PV sudden change load exert influence on safe efficient operation FTPSS. To improve benefits compensate for imbalance between demand in short-term operation, a...

The optimization of train trajectory and timetable offers two effective methods energy-efficient operations. Most traditional research optimizes them separately thus the global optimality cannot be achieved. Previous work has mainly concentrated on minimizing mechanical energy consumption trains, not electrical energy. This paper aims to develop an integrated model optimize timetable, which includes both achieve minimum consumption. AC power supply system is first proposed calculate...

Co-phase traction power supply system provides the insights for solving existing quality and electrical sectioning issues in high-speed railways, flexible control of co-phase substation (CTSS) with integration photovoltaic (PV) hybrid energy storage (HESS) attracts widespread attention. However, strong volatilities uncertainties PV load introduce challenges to reliable economic operation CTSS. In this study, management CTSS aims at minimizing operating cost by coordinating PV, HESS, flow...

The integration of hybrid energy storage systems (HESS) in alternating current (AC) electrified railway is attracting widespread interest. However, little attention has been paid to the interaction optimal size and daily dispatch HESS within entire project period. Therefore, a novel bi-level model traction substation management (RTSEM) system developed, which includes slave level diurnal master sizing. formulated as mixed integer linear programming (MILP) by coordinating HESS, load,...

Single-phase 25 kV AC traction power supply systems (TPSSs) are widely used in high-speed railways, leading to an increasingly prominent problem of voltage unbalance (VU) the grid. To fairly regulate system VU level, implementing limit pre-assessment is urgent need. A grid connection scheme including transformer selection and exchange phase design a vital part TPSS that obviously affects factor systems. uniform mathematical model established using Thevenin's theorem, which reveals impact...

The worst voltage unbalance (VU) problems are aroused by single-phase 25-kV traction power supply systems (TPSSs) of high-speed railways (HSRs) in a three-phase grid, especially when connected to weak remote grid which is around number large-scale wind farms. Implementing VU management for HSRs, including limit government and compensation VU, an important approach ensure the network operates securely. In this article, portray performance Double-fed induction generators (DFIGs) under...

A novel energy management model for connected co-phase traction power system (CCTPS) is proposed, in which hybrid storage systems (HESS) and photovoltaic (PV) are considered, the exchanges between adjacent substations (TSSs) can be fulfilled via transfer controller (PTC). The strategy aims at coordinating regenerative braking energy, local renewable peak-valley difference TSSs so as to minimize daily operating costs of CCTPS, three phase voltage unbalance constraints particularly a...

A methodology of energy management for the co-phase traction power system with hybrid storage (HESS) and photovoltaic (PV) panels integrated is proposed in this study. This problem developed as a mixed-integer linear programming (MILP) model target lower operating costs, constraints three-phase voltage unbalance are taken into account particular. Several linearization approaches applied formulation MILP scenario-based technique also adopted uncertainty PV generation. real case analysis...

The voltage unbalance (VU) problem aroused the severe operation accident for wind farm, as single-phase traction power supply system (TPSS) and farm connected to a common busbar. This paper presents uniform mathematical model portray VU transfer between TPSS of high-speed railway (HSR), asymmetric grid. Furthermore, an estimating approach VUF is proposed illustrate impact on TPSS. Finally, effectiveness verified by case study, revealed reason how affects propagation.

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

This paper presents a methodology of optimal hybrid energy storage system (HESS) sizing, which includes master problem power and capacities configuration HESS, slave daily HESS operation. In the problem, total cost co-phase traction substation (CTSS) during project service period is minimized, with battery aging replacement considered. formulation mixed integer linear programming (MILP) performed minimized electricity CTSS. Grey wolf optimizer embedded CPLEX solver adopted to solve this...