Abstract
AC traction load is generally a large single-phase load with dynamic characteristics due to which a significant negative sequence component of current (NSC) is drawn from the grid and harmonics are injected in voltage and current. This inflicts undesirable effects on power quality. This work proposes a unified power quality conditioner which is a combination of a shunt-connected distribution static synchronous compensator (D-STATCOM) and a series-connected dynamic voltage restorer (DVR) to mitigate the degradation of power quality. The D-STATCOM helps in reducing the NSC significantly and suppressing the harmonic distortions. DVR addresses the voltage sag caused by the shunt compensating device. Control strategies for D-STATCOM and DVR for the unified power quality compensator are presented. The system is simulated in MATLAB environment, and a comparative analysis is carried out under various loading circumstances. As a result, superior power quality is achieved with the proposed UPQC.
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Sinha, R., Vidya, H.A., Sudarshan Reddy, H.R. (2023). Unified Power Quality Conditioner for V-V Connected Electrified Railway Traction Power Supply System. In: Kumar, A., Mozar, S., Haase, J. (eds) Advances in Cognitive Science and Communications. ICCCE 2023. Cognitive Science and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-19-8086-2_26
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DOI: https://doi.org/10.1007/978-981-19-8086-2_26
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