A New Railway Power Flow Control System Coupled With Asymmetric Double &lt;italic&gt;LC&lt;/italic&gt; Branches

Hu, Sijia; Zhang, Zhiwen; Li, Yong; Luo, Longfu; Luo, Pei; Cao, Yijia; Chen, Yuehui; Zhou, Guandong; Wu, Bin; Rehtanz, Christian

doi:10.1109/tpel.2014.2369132

Cited by 33 publications

(14 citation statements)

References 32 publications

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“…The other phase is connected to the three-phase power grid through a single-phase CT. It is worth mentioning that some studies recommend inserting a double asymmetric capacitive-inductive structure in the two coupling branches of the RPC for a better heavy-load compensation capacity and lower DC-link voltage [19].…”

Section: Hybrid Co-phase Rpc (Co-hrpc)mentioning

confidence: 99%

“…In the FB-RPC and the TW-RPC, the IGBT voltage stress is equal to half of the RPC DC-link voltage, V dc , but it is double this value in the HB-RPC due to the half-bridge topology [6][7][8]. In the hybrid RPC topology with a single or double LC passive filter-branch, the IGBT voltage stress is lower than half of the RPC DC-link voltage due to the capacitive coupling structure [19].…”

Section: Comparative Study Between the Rpc Topologies In V/v And Scotmentioning

confidence: 99%

“…This is possible by using a capacitive-inductive structure in one coupling branch of the RPC, which improves the RPC performance. In [19], a study recommends to include a double asymmetric capacitive-inductive structure in the two coupling branches of the RPC for a better heavy-load compensation capacity with a lower DC-link voltage. On the other hand, a flexible DC-link voltage control for the co-HRPC system is proposed in [20] to reduce the power losses during the RPC operation, besides reducing the RPC ratings.…”

Section: Introductionmentioning

confidence: 99%

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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: Hybrid Co-phase Rpc (Co-hrpc)mentioning

confidence: 99%

Section: Comparative Study Between the Rpc Topologies In V/v And Scotmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…For the measurement-based method, an easy way is to access field test data [14]- [16]. However, it is unsatisfactory in terms of convenience and flexibility and does not give an insight into the load pattern as well.…”

Section: Introductionmentioning

confidence: 99%

Stochastic Process and Simulation of Traction Load for High Speed Railways

2019

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The traction load of a high-speed railway (HSR) may cause significant voltage fluctuations in the traction power supply system and the utility grid. To evaluate power quality, modeling traction load is an urgent need as well as a fundamental work. This paper aims to build a probabilistic model to describe the pattern of traction load changing with time. It is very challenging due to the randomness of train behavior. This paper first investigates the stochastic process of traction load and points out that the size and frequency of load fluctuation, respectively, rely on the slope and length of the rail ramp. Based on this, train power (TP) and headway (TH) are set as two basic components of the probabilistic model, where TP and TH are described by a normal distribution and an exponential distribution, respectively. In addition, a sliding time-window method is developed for generating time-dependent load samples. The proposed method has low complexity, as well as can consider the randomness, giving more realistic simulation results. It can be used to forecast traction load for a planning railway or to establish a measurement-based model for an operating railway. A case study is performed for parameter identification and model verification, and the rapid voltage change (RVC) caused by the HSR loads has been evaluated in different operation scenarios. INDEX TERMS Dynamic headway, high-speed railway (HSR), probabilistic model, rapid voltage change (RVC), traction load.

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“…Since this system hasn't been widely applied, more analysis in V/V transformer traction power system is needed. References [13,14] proposed and analyzed a novel RPC with asymmetric passive LC branches, which can operate with lower DC-link voltage. RPC has good dynamic response and low harmonics, which is fit for comprehensive solving highspeed railway negative sequence and harmonic problems.…”

mentioning

confidence: 99%

Optimal electromagnetic hybrid negative current compensation method for high-speed railway power supply system

Yuan

Zhong

Zhang

et al. 2016

J. Mod. Power Syst. Clean Energy

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To achieve economical compensation for the huge-capacity negative sequence currents generated by high-speed railway load, an electromagnetic hybrid compensation system (EHCS) and control strategy is proposed. The EHCS is made up of a small-capacity railway static power conditioner (RPC) and a large-capacity magnetic static var compensator (MSVC). Compared with traditional compensation methods, the EHCS makes full use of the SVC's advantages of economy and reliability and of RPC's advantages of technical capability and flexibility. Based on the idea of injecting a negative sequence, the compensation principle of the EHCS is analyzed in detail. Then the minimum installation capacity of an EHCS is theoretically deduced. Furthermore, a constraint optimization compensation strategy that meets national standards, which reduces compensation capacity further, is proposed. An experimental platform based on a digital signal processor (DSP) and a programmable logic controller (PLC) is built to verify the analysis. Simulated and experimental results are given to demonstrate the effectiveness and feasibility of the proposed method.

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A New Railway Power Flow Control System Coupled With Asymmetric Double <italic>LC</italic> Branches

Cited by 33 publications

References 32 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

Stochastic Process and Simulation of Traction Load for High Speed Railways

Optimal electromagnetic hybrid negative current compensation method for high-speed railway power supply system

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