Abstract
The derating of the Power transformer is important and essential to analyse the impact on the connected power system. When the tank temperature increases, the load on the transformer has to be reduced to maintain constant top oil temperature inside the tank. However, tank temperature is also affected by atmospheric temperature and wind speed which vary dynamically. This paper introduces a new simplified approach to determine the derating factor and the consequent probability of expected loss of load (LOLE) supplied by the transformer. New convoluted forecasting mechanisms for estimating atmospheric temperature and wind speed were proposed one day in advance and authenticated by MOSDAC (India) with actual weather data collected. Such forecasted values are used to measure the temperature of the transformer tank at which the derating factor is estimated. The proposed approach has been tested on a 100 MVA transformer to demonstrate its effectiveness.
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Acknowledgements
The authors sincerely thank and acknowledge the contribution of MOSDOC (Meteorological & Oceanographic Satellite Data Archival Centre), India by supplying essential data required to analyses the proposed methodologies.
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Bharath Kumar, T., Ramamoorty, M. (2021). Effect of Loss of Load Probability Due to Power Transformer Derating Factor on Smart Grid Reliability. In: Sherpa, K.S., Bhoi, A.K., Kalam, A., Mishra, M.K. (eds) Advances in Smart Grid and Renewable Energy. ETAEERE ETAEERE 2020 2020. Lecture Notes in Electrical Engineering, vol 691. Springer, Singapore. https://doi.org/10.1007/978-981-15-7511-2_3
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