Potentials, peculiarities and prospects of solar power generation on the railway premises

Hayashiya, Hitoshi; Itagaki, Hiroshi; Morita, Yuichi; Mitoma, Yoshihisa; Furukawa, Takayuki; Kuraoka, Takuya; Fukasawa, Yuta; Oikawa, Takatoshi

doi:10.1109/icrera.2012.6477458

Cited by 38 publications

(18 citation statements)

References 2 publications

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“…Based on this analysis, we modified, harmonised, and adapted requirements in a wide range of gridinterconnection standards and codes as well as company operation practices to the specific behaviour of bidirectional EVCSs. These requirements also accounted for the impact of different sources [52][53][54] on SDNs, as well as the impact of EVCSs [4][5][6] on SDNs and on RTSs [55]. The critical review and the subsequent elaboration of a unified set of requirements were carried out in the framework of the FerroSmartGrid project [18].…”

Section: Aim Of the Studymentioning

confidence: 99%

Overview of electrical protection requirements for integration of a smart DC node with bidirectional electric vehicle charging stations into existing AC and DC railway grids

Sánchez-Sutil

Hernández

Tobajas³

2015

Electric Power Systems Research

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Section: Aim Of the Studymentioning

confidence: 99%

Overview of electrical protection requirements for integration of a smart DC node with bidirectional electric vehicle charging stations into existing AC and DC railway grids

Sánchez-Sutil

Hernández

Tobajas³

2015

Electric Power Systems Research

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“…The introduction of renewable energy is to partially reduce the depletion of non-renewable energy resources and thus reduce CO 2 emissions. These outcomes have been favored by scholars and many countries, such as North American, European, China, and Japan [6,7]. But in practice, the traction energy consumption of railways has not been reduced.By contrast, the efficient driving and regenerative braking schemes differ the renewable energy scheme.…”

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confidence: 99%

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

Gao

et al. 2019

Energies

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This paper presents a modified power supply system based on the current alternating current (AC)-fed railways with neutral zones that can further improve the eco-friendliness and smart level of railways. The modified system complements the existing infrastructure with additional energy-storage-based smart electrical infrastructure. This infrastructure comprises power electronic devices with energy storage system connected in parallel to both sides of each neutral zone in the traction substations, power electronic devices connected in parallel to both sides of each neutral zone in section posts, and an energy management system. The description and functions of such a modified system are outlined in this paper. The system allows for the centralized-and distributed-control of different functions via an energy management system. In addition, a control algorithm is proposed, based on the modified system for regenerative braking energy utilization. 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. These outcomes have been favored by scholars and many countries, such as North American, European, China, and Japan [6,7]. But in practice, the traction energy consumption of railways has not been reduced.By contrast, the efficient driving and regenerative braking schemes differ the renewable energy scheme. They can essentially reduce the traction energy consumption of railways.Efficient driving is an effective way to reduce the traction energy consumption of rolling stock. Typically, the running state of vehicles comprises three phases: braking, speed-holding (cruising) and acceleration. At present, many literatures have studied the efficient driving and realize the traction energy savings through the optimum combination of these phases [8][9][10][11][12][13]. To implement such trajectories and maximize savings, some auxiliary systems, such as driver advisory systems (DAS) [10,11] and automatic train operation (ATO) [12,13], must be provided to drivers. The trials of such systems have shown savings of 5-18%. However, with efficient driving, the savings of energy consumption may sacrifice service quality, such as the train speed, stopping time, etc. [1].Regenerative braking energy (RBE) recovery is a simple and efficient way to reduce energy consumption, which cannot influence the operati...

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“…Future development will focus on the distributed PV system, which is located as close to the user as possible [19]. Railway companies have much potential to introduce PV system around railway premises, such as the roof of platforms, substations, vehicle depots, sound walls and other buildings or openings along the line [20]. It is reported that the PV system installed on platform roof of Tokyo station generates 340 MWh electric energy annually [20].…”

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confidence: 99%

A Novel Hybrid DC Traction Power Supply System Integrating PV and Reversible Converters

Zhang

Tian

et al. 2018

Energies

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A novel hybrid traction power supply system (HTPSS) integrating PV and reversible converter (RC) is proposed. PV is introduced to reduce the energy cost and increase the reliability of power systems. A reversible converter can achieve multiple objectives including regenerative braking energy recovery, PV energy inverting, DC voltage regulation and power factor improvement. In this paper, the topology and operating modes of the HTPSS are first introduced. Three-level boost converter (TLBC) is employed in the PV system. A double closed-loop control scheme considering both maximum power point tracking (MPPT) and midpoint potential balancing (MPB) is recommended. The reversible converter adopts a multi-modular topology and the independent control for active power and reactive power has been achieved by a current decoupling control. According to the working characteristic of each device, a coordinated control strategy is designed, and four basic principles are given. A system simulation model containing a hybrid traction substation and a train was built, and comprehensive simulations under multi-scenario were carried out. The results show that the reversible converter can accomplish PV energy inversion, DC voltage regulation, regenerative braking energy recovery and power factor improvement, by which a high utilization rate and energy-saving effect can be obtained.Energies 2018, 11, 1661 2 of 24 train runs between two substations, the braking time is only 10-15 s under normal circumstances. The relatively low utilization rate, in addition to the single function (just inverting), result in a long investment payback period. It is becoming the main obstacle for the massive application of inverters.Urban rail transit is becoming a big energy consumer and has significant impacts on energy consumption at a regional scale [15]. It turns out to be more and more urgent to reduce system energy consumption through all possible means. As a clean energy, photovoltaic has had rapid development all over the world recently, and the installed capacity has been increasing year by year [16,17]. Large-scale PV plants are mainly located in the desert regions due to the high solar irradiance and vast area, but the output power is usually constrained by the transmission capacity of the grid [18]. Future development will focus on the distributed PV system, which is located as close to the user as possible [19]. Railway companies have much potential to introduce PV system around railway premises, such as the roof of platforms, substations, vehicle depots, sound walls and other buildings or openings along the line [20]. It is reported that the PV system installed on platform roof of Tokyo station generates 340 MWh electric energy annually [20]. The possibility of introducing PV technologies into traction power supply system is discussed in [21], but solar energy is just used for air conditioning and lighting. In [22], a grid-connected PV system is introduced in TPSS. However, it is not an optimal scheme for the transmission and distribution of...

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Potentials, peculiarities and prospects of solar power generation on the railway premises

Cited by 38 publications

References 2 publications

Overview of electrical protection requirements for integration of a smart DC node with bidirectional electric vehicle charging stations into existing AC and DC railway grids

Overview of electrical protection requirements for integration of a smart DC node with bidirectional electric vehicle charging stations into existing AC and DC railway grids

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

A Novel Hybrid DC Traction Power Supply System Integrating PV and Reversible Converters

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