Optimized design coordination of a single phase static VAr compensator for AC railway traction

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-02-18 DOI:10.1016/j.epsr.2025.111502

Soham Chakraborty , Dipten Maiti , Susovan Mukhopadhyay , Abanishwar Chakrabarti , Sujit K. Biswas

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引用次数: 0

Abstract

Static VAr Compensators are widely used in single-phase railway-traction for variable reactive-power compensation and voltage support. This paper proposes an offline-optimized design of a single-phase static VAr compensator for traction applications. The proposed design is constituted optimally using a thyristor controlled reactor (TCR), fixed-capacitor (FC), a 3rd harmonic series-tuned filter and a coupling-reactor. The LC filter bypasses TCR 3rd harmonic current. The FC also offers low-impedance path to higher-order harmonics whereas the coupling-reactor damps residual harmonics. The proposed design has lesser number of passive components (five components), reduced size (44 % lesser passive components) compared to classical-schemes and yet limits the current harmonic-distortion below maximum permissible limit (5 %THD, IEEE Std.-519–2022) at all load conditions. The overall volt-ampere consumed by filter circuit elements is also reduced by 75 % compared to classical-scheme which in turn reduces the overall rated-VA of SVC components. The proposed design has least chances of resonance with source-inductance, and performs irrespective of source short-circuit ratio. An offline-optimized iterative design method including a particle swarm optimization is described for minimal component count and size of SVC with minimum line-current THD which is a challenge in 1-phase SVC. The simulation and experimental results are presented to support the proposed scheme.

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.