Flexible Fractional Compensating Mode for Railway Static Power Conditioner in a V/v Traction Power Supply System

Roudsari, Hossein Mahdinia; Jalilian, Alireza; Jamali, S.

doi:10.1109/tie.2018.2801779

Cited by 45 publications

(26 citation statements)

References 33 publications

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“…The principle of operation of this RPC topology has been described and validated to compensate, simultaneously, NSC, reactive power and harmonic currents [43,46]. To overcome the power quality deterioration at the three-phase power grid, RPC based on a full-bridge B2B two-level converter (FB-RPC), sharing the same DC-link, can provide power quality improvement.…”

Section: Rpc Based On a Full-bridge Back-to-back Two-level Converter mentioning

confidence: 99%

Topologies and Operation Modes of Rail Power Conditioners in AC Traction Grids: Review and Comprehensive Comparison

et al. 2020

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Electric locomotives in AC traction power systems represent a huge single-phase non-linear load and, detrimentally, affect the power quality and the efficiency of the three-phase power grid. Nevertheless, along the last decades, power electronics are being used to mitigate power quality problems in the three-phase power grid. In particular, Rail Power Conditioner (RPC) helps to increase the loading capacity of traction substations and improve the power quality of three-phase power grids. As the main characteristics, an RPC can supply reactive power, suppress current harmonics and overcome currents imbalance of the three-phase power grid. On the other hand, the traction substations may be constituted by different types of power transformers. For instance, single-phase power transformers and open-delta (V/V) power transformers are widely used, while Scott power transformers are less frequently used, since they are more complex and expensive. In this framework, this work presents a review study of RPC topologies, including their operation modes, and a comprehensive comparison between the characteristics of the RPC topologies when using different types of AC traction substations and power transformers. This helps to ensure the correct selection of the RPC topology for a specific application, according to the main structure of the traction substation. Consequently, and based on the established review, it is possible to sort and allocate each RPC topology for limited or wider applications.

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Section: Rpc Based On a Full-bridge Back-to-back Two-level Converter mentioning

confidence: 99%

Topologies and Operation Modes of Rail Power Conditioners in AC Traction Grids: Review and Comprehensive Comparison

et al. 2020

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“…The EPTD can also be used as a three phase balancer for Scott transformer and other transformer connections. At present, many control methods of EPTD (RPC or ES-RPC) have been proposed [35][36][37][38][39][40][41]. This paper did not elaborate too much on it.…”

Section: Power Quality Improvementmentioning

confidence: 99%

“…The feasibility of the additional functions of power quality improvement, peak cutting and valley filling, management and control for clean energy, active control for line voltage, and emergency power supply are widely discussed in literatures [5,6,14,[20][21][22][23][24]28,[30][31][32][35][36][37][38][39][40][41][42][43][44]. For the realization process and verification results of those functions, readers can see the above-mentioned literatures.…”

Section: Figure 20mentioning

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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“…The power flow controller (PFC) scheme has been adopted to the TPSS [8], for example, by way of the railway static power conditioner (RPC) and co-phase TPSS. Mochinaga proposed the RPC [9]; different control strategies and structures have also been proposed [10][11][12]. On the other hand, Li proposed the co-phase TPSS configuration [13], which was applied to engineering in 2011 [14]; various other structures have also been proposed [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Control of a Novel Hybrid Power Quality Compensation System for 25-kV Electrified Railway

Chen

Wei

2019

Energies

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The severe power quality problems aroused by the single-phase 25-kV traction power supply system (TPSS), especially for the voltage unbalance (VU) and high-frequency harmonic resonance, have attracted increasing attention nowadays. In this paper, a novel hybrid power quality compensation system, including a power flow controller (PFC) and thyristor-controlled L and C-type filter (TCL-CTF), is proposed. The PFC can be used for VU compensation, and the TCL-CTF can be designed to filter out harmonics as well as compensate reactive power. Furthermore, an optimized compensation strategy is proposed, and the power quality of the TPSS can meet the requirements of the technology standard. Compared with the conventional scheme, the compensation capacity of the PFC can be reduced by 12%, as well as the cost. Finally, the effectiveness of the proposed system is verified by the simulation and experimental results.

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Flexible Fractional Compensating Mode for Railway Static Power Conditioner in a V/v Traction Power Supply System

Cited by 45 publications

References 33 publications

Topologies and Operation Modes of Rail Power Conditioners in AC Traction Grids: Review and Comprehensive Comparison

Topologies and Operation Modes of Rail Power Conditioners in AC Traction Grids: Review and Comprehensive Comparison

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

Modeling and Control of a Novel Hybrid Power Quality Compensation System for 25-kV Electrified Railway

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