Towards railway-smartgrid: Energy management optimization for hybrid railway power substations

Abstract

In order to analyze the feasibility of implementing Smart Grid technologies at railway network scale, this paper presents an optimization study of hybrid railway power substations energy management. Fuzzy logic supervision strategy is developed to achieve renewable energy sources and storage units' coordination in the railway power substation. Objectives such as limitation of the exceeding subscribed power by favoring local renewable energy consumption are considered through empirically defined supervision parameters. Declared as optimization variables, these are the inputs and outputs of the fuzzy logic membership functions. Then, adapted economic indicators chosen to quantify supervision's performance are defined as the objective functions in the optimization model. To solve the problem, experimental design and genetic algorithm are iteratively implemented in an optimization interface. Eventually, to illustrate the influence of the optimization procedure on the system supervision, the simulation results of the optimal solution are analyzed.

Energy-Storage-Based Smart Electrical Infrastructure and Regenerative Braking Energy Management in AC-Fed Railways with Neutral Zones

“…After storage, all regenerative power is utilized in railway system. (4) Step 4: Screening out the ESS with storage energy and storing the number of the ESSs in variable j. j is an odd number (see Figure 3). Case 1: P j = 0, P j+1 = 0.…”

“…This would ensure that all the regenerative braking energy in the whole railway electrical system is used more efficiently. Finally, a modified power supply system with eight power supply sections is considered to be a case study; furthermore, the advantages of the proposed system and the effectiveness of the proposed control algorithm are verified.The installation of equipment that provide clean energy from renewable sources (e.g., solar panels and wind generators) to feed the traction loads in rail may have a significant impact in the energy costs and CO 2 emissions of a railway system, increasing the environment friendliness of the railway [4][5][6]. The introduction of renewable energy is to partially reduce the depletion of non-renewable energy resources and thus reduce CO 2 emissions.…”

“…The installation of equipment that provide clean energy from renewable sources (e.g., solar panels and wind generators) to feed the traction loads in rail may have a significant impact in the energy costs and CO 2 emissions of a railway system, increasing the environment friendliness of the railway [4][5][6]. The introduction of renewable energy is to partially reduce the depletion of non-renewable energy resources and thus reduce CO 2 emissions.…”

Optimal Energy Management of Railroad Electrical Systems with Renewable Energy and Energy Storage Systems

“…Lithium-ion and lead-acid type batteries are used in electrified railways in Japan, and flywheels are used for energy saving in light railroad vehicles. The feasibility of implementing Smart Grid (SG) technologies at the railway network scale and providing the energy management of hybrid railway power substations is analyzed in [15]. An optimization model for railroad transportation systems with the integrated SG is proposed in [16].…”

Smart management system for improving the reliability and availability of substations in smart grid with distributed generation

“…This would help in diversifying energy supplies, reducing energy consumption during peak load, and improving grid integration reliability. A lot of research work has been conducted for the energy management system (EMS) for distribution substations [8–12]. In [8], the authors proposed the use of Internet of things (IoTs) to monitor and control different system parameters for energy management in the smart grid.…”