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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/18626
Title: Thermal Loading of Multi-Megawatt Medium-Voltage Power Converters Serving to Variable Speed Large Pumped Storage Units
Authors: Desingu K.
Selvaraj R.
Chelliah, Thanga Raj
Khare, Deepak
Joshi L.P.
Published in: Proceedings of 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2018
Abstract: In recent era, large rated doubly fed induction machines (DFIM) are being preferred for variable speed pumped storage power plant (PSPP), due to its high round trip efficiency and high power discharge. To operate the large rated DFIM under variable speed operation, parallel connected back-to-back (BTB) power converters are employed in rotor excitation circuit. The semiconductor devices associated with the rotor excitation circuit are considered as the most vulnerable components in large hydrogenerating systems due to its thermomechanical fatigue stress. Especially, the major failure in the BTB converters are influenced by the thermal stress across the power semiconductor devices. In order to increase the BTB converter reliability, thermal stress on power semiconductor devices must be within the acceptable limits. With respect to this prime aim, this paper implements an active thermal control based on discontinuous pulse width modulation (DPWM) technique for multi-megawatt BTB power converters serving to a variable speed PSPP (4×250 MW DFIM, to be commissioned in Tehri dam, India). The implemented active thermal controller regulates the temperature fluctuation across power semiconductor devices with respect to varying speed (active power) conditions. The efficacy of the designed active thermal control is implemented and analyzed for real-time 250 MW DFIM with 5-channel 25 MW power converters in Matlab/PLECS environment. © 2018 IEEE.
Citation: Proceedings of 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2018, (2018)
URI: https://doi.org/10.1109/PEDES.2018.8707902
http://repository.iitr.ac.in/handle/123456789/18626
Issue Date: 2018
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: Doubly fed induction machine (DFIM)
Neutral point clamped (NPC) converter
Power losses
Thermal loading
Variable speed pumped storage power plant (VSPSPP)
ISBN: 9.78E+12
Author Scopus IDs: 57195493326
57193957098
35755335100
14060295600
57208863446
Author Affiliations: Desingu, K., Hydropower Simulation Laboratory, Indian Institute of Technology Roorkee, India
Selvaraj, R., Hydropower Simulation Laboratory, Indian Institute of Technology Roorkee, India
Chelliah, T.R., Hydropower Simulation Laboratory, Indian Institute of Technology Roorkee, India
Khare, D., Hydropower Simulation Laboratory, Indian Institute of Technology Roorkee, India
Joshi, L.P., Tehri Hydropower Development Corporation (THDC) India Limited, India
Funding Details: ACKNOWLEDGEMENT Authors thank Central Power Research Institute (India) for the financial support provided to this research, along with a research fellowship. In addition, the authors would like to thank THDC India Limited for providing machine data for this research.
Appears in Collections:Conference Publications [WR]

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