Load Sharing and Wayside Battery Storage for Improving AC Railway Network Performance With Generic Model for Capacity Estimation—Part 2

Perin, Igor; Walker, Geoffrey R.; Ledwich, Gerard

doi:10.1109/tie.2018.2818641

Cited by 14 publications

(7 citation statements)

References 38 publications

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“…Differently, the installation of energy storage equipment in the RSO's power system can be considered. 'onboard' and 'wayside' solutions are widely proposed [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Impact on railway infrastructure of wayside energy storage systems for regenerative braking management: a case study on a real Italian railway infrastructure

Alfieri

Battistelli²,

Pagano

2019

IET Electrical Systems in Transportation

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Today, in the railway sector there is considerable interest in studying the best ways of exploiting train braking energy, in order to achieve a reduction in energy costs and better stabilisation of grid voltage. Among the various on-board or wayside measures proposed, one of the most promising solutions is based on using wayside energy storage systems (WESSs). A WESS is a storage installation which can be integrated into mass transit systems in urban areas as well as into long-distance railway lines. It can operate as a smart storage system able to provide relevant benefits in terms of recovering surplus regeneration braking energy, voltage stabilisation, reduction of peak power demand. For these purposes, an effective and flexible simulator is essential to provide all the elements needed to focus and compare feasible configurations and operations. This study examines the problem of introducing the WESS technology in real railway infrastructure. It proposes a method based on a simulator of the WESS system integrated into the infrastructure and carries out the results of dynamic simulations referring to real operating data of the system and vehicles. The results highlight the performance of the WESS in terms of energy and power exchange, also discussing economic aspects.

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“…Differently, the installation of energy storage equipment in the RSO's power system can be considered. 'onboard' and 'wayside' solutions are widely proposed [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Impact on railway infrastructure of wayside energy storage systems for regenerative braking management: a case study on a real Italian railway infrastructure

Alfieri

Battistelli²,

Pagano

2019

IET Electrical Systems in Transportation

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“…It can be seen from Section 3.2 that when compensating negative sequence current, RPC k first transfers half of the difference of the active power of the two power arms (namely, |P 𝛼,k − P 𝛽,k |∕2) from one power arm to the other. At the same time, the reactive powers Q α,k and Q β,k FIGURE 19 Waveforms of load currents FIGURE 20 Comparison of regenerative braking energy utilization and system response speed scenarios that VSC 1 and VSC 2 need to compensate for the two power supply arms respectively are Since ETC l only needs to regulate the regenerative braking power of P ER,l from one power supply arm to another, its theoretical capacity S TE,l is…”

Section: The Capacity Assessment Of Each Rpc and Etcmentioning

confidence: 99%

“…Optimizing the train timetable is an inexpensive option [20]. By adjusting the train timetable, the regenerative braking energy can be utilized by the accelerating trains in the same power arm [4,21].…”

Section: Introductionmentioning

confidence: 99%

An effective utilization scheme for regenerative braking energy based on power regulation with a genetic algorithm

Cheng

Wang

et al. 2022

IET Power Electronics

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To ensure that regenerative braking energy is fully utilized by traction trains in the whole railway power supply systems, an effective utilization scheme of the regenerative braking energy based on power regulation with a genetic algorithm (GA) is proposed in this paper. This scheme consists of railway power conditioners (RPCs), energy transfer converters (ETCs) and a central controller. A RPC connects the two power arms of each TS, and an ETC connects the two power arms of each section post (SP). The RPCs and ETCs are controlled to transfer the regenerative braking power distributed by the central controller, which is calculated by the GA. The detailed calculation steps are described. Moreover, the principle and control strategies of the negative sequence current compensation by the RPCs are given based on the optimization results of the GA. Finally, optimization calculations and hardware in loop (HIL) experiments were performed. The results show that the utilization rate of regenerative braking energy is about 93.3% and the three-phase current imbalance is reduced by about 98.6% in the case system with the proposed scheme. This result verifies the effectiveness and feasibility of the proposed scheme.

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“…Traction and regenerative braking of locomotives will cause voltage fluctuations on lines, and the introduction of regenerative sources will also cause voltage fluctuations on lines [20,28]. The effects of the equivalent parameters of the line, such as the reactive power generated by parasitic capacitor, can also cause line voltage fluctuations [46,47]. The range of voltage fluctuation can be suppressed by introducing the modified system.…”

Section: Active Control For Line Voltagementioning

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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Load Sharing and Wayside Battery Storage for Improving AC Railway Network Performance With Generic Model for Capacity Estimation—Part 2

Cited by 14 publications

References 38 publications

Impact on railway infrastructure of wayside energy storage systems for regenerative braking management: a case study on a real Italian railway infrastructure

Impact on railway infrastructure of wayside energy storage systems for regenerative braking management: a case study on a real Italian railway infrastructure

An effective utilization scheme for regenerative braking energy based on power regulation with a genetic algorithm

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

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