Abstract
With respect to the problems of great impact on the utility grid, the increasing catenary voltage, the limited utilization rate of the regenerative braking energy (RBE) and the irreducible cost of electricity for locomotives caused by the RBE generated by electric locomotives of the whole railway line cannot be fully utilized in traction power supply systems. An energy management system (EMS) integrating electrical energy and information is proposed in this paper. A corresponding optimization algorithm is also proposed to calculate the distribution of the regenerative braking power in the whole railway line. The structure and working principle of the EMS are introduced. The basic principle and detailed steps of the proposed algorithm are given. Finally, the optimization calculation and simulation are carried out, the effectiveness and feasibility of the proposed EMS and the optimization algorithm are verified.
Highlights
Railway is the most environmentally friendly transportation and the major energy consumer [1].Given the increasingly urgent demand for resources and prominent environmental problems, it is crucial to realize the importance of energy saving, emission reduction and green development of electrified railway systems
To improve the effective utilization of the RBEelectrical of the whole railway line, this paper proposes an of optimizing the distribution of the regenerative braking power is designed based on the principle energy management system (EMS) integrating electrical energy and information
When Pj−2 > 0, in order to make the regenerative braking energy (RBE) of Sj be used by the traction trains in Sj−2 as much as possible, the regenerative braking power transferred from Sj was b0 = min{Pj−2/η2, |Pj|}, namely, pj−1 and pj−2 at this time can be calculated by: 2019, 12, Energies
Summary
Railway is the most environmentally friendly transportation and the major energy consumer [1]. Reference [16] proposes that three energy optimization controllers (their topology are the same as RPC) are installed in two TSs to transfer and utilize the RBE of two adjacent power supply arms, eliminate a three-phase unbalance of the utility grid and realize reactive power compensation. Cophase power supply technology can realize voltage cophase in different power supply sectors of the whole railway line, cancel the electric phase separation link, extend the power supply distance, expand the flow range of the RBE and help to improve the utilization rate of the RBE. To improve the effective utilization of the RBEelectrical of the whole railway line, this paper proposes an of optimizing the distribution of the regenerative braking power is designed based on the principle energy management system (EMS) integrating electrical energy and information.
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