Impact of high PV penetration on distribution transformer life time

Pezeshki, Houman & Wolfs, Peter (2013) Impact of high PV penetration on distribution transformer life time. In Proceedings of 2013 IEEE Power and Energy Society General Meeting (PES), IEEE, Vancouver, BC.

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Integration of rooftop photovoltaics (PVs) in residential networks at moderate penetration levels is becoming a reality in many countries including Australia. Despite the technical challenges in properly accommodating PV units, one of the major benefits is the ability of PV units to extend useful life time of distribution transformers. This effect is not quantified in the existing literature. This paper carries out an analysis into the impacts of rooftop PVs at different penetration levels on the performance of distribution transformers and residential networks. This paper presents a methodology to quantify the benefit of the distribution transformer life extension brought about by customer-owned rooftop PV units. The proposed methodology is applied to a real distribution system with various scenarios, including different penetration levels. The results show the distribution transformer loss-of-life function, as a function of the rooftop PV penetration level, is monotonically decreasing function which saturates after a certain penetration level. The best life improvements occur with transformers that are highly loaded and the presence of a significant PV installation may support the deferral of transformer upgrades.

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ID Code: 79451
Item Type: Conference Paper
Refereed: Yes
Keywords: building integrated photovoltaics, distributed power generation, power transformers, distribution system, distribution transformer life extension, distribution transformer life time, distribution transformer loss-of-life function, moderate penetration level, residential network, rooftop PV penetration level, rooftop PV unit, rooftop photovoltaic integration, Load modeling, Oil insulation, Power transformer insulation, Temperature distribution, Thermal loading, Windings, Rooftop PV, loss of life, smart grids, transformers
DOI: 10.1109/PESMG.2013.6672074
ISBN: 1944-9925
ISSN: 9781479913039
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 IEEE
Deposited On: 15 Dec 2014 05:40
Last Modified: 15 Dec 2014 06:21

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