Title:
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Study of resonances in 1 x 25 kV AC traction systems with external balancing equipment
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Author:
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Mesbahi, Nadhir; Monjo Mur, Lluís; Sainz Sapera, Luis
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica; Universitat Politècnica de Catalunya. QSE - Qualitat del Subministrament Elèctric |
Abstract:
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Abstract:
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AC traction systems are 1 × 25 or 2 × 25 kV/50 Hz single-phase, nonlinear, time-varying loads that can cause power-quality problems, such as unbalanced or distorted voltages. To reduce unbalance, external balancing equipment is usually connected to these systems, forming the Steinmetz circuit. Parallel resonances can occur in these types of circuits, exciting the harmonic emissions (below 2 kHz) of railway-adjustable speed drives. This paper studies these resonances at pantograph terminals and provides analytical expressions to determine their harmonic frequencies. The expressions are validated from several traction systems in the literature and PSCAD simulations. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria mecànica -Àrees temàtiques de la UPC::Energies::Energia elèctrica -Harmonic analysis -Electric machinery--Alternating current -Harmonic analysis -Resonance -Steinmetz circuit -Traction systems -Anàlisi harmònica -Maquinària elèctrica--Corrent altern |
Rights:
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http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Submitted version Article |
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