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Impact of high PV penetration on distribution transformer insulation life
journal contributionposted on 2017-12-06, 00:00 authored by H Pezeshki, Peter WolfsPeter Wolfs, G Ledwich
The reliable operation of distribution systems is critically dependent on detailed understanding of load impacts on distribution transformer insulation systems. This paper estimates thei mpact of rooftop photovoltaic (PV) generation on a typical 200-kVA, 22/0.415-kV distribution transformer life under different operating conditions. This transformer supplies a suburban area with a high penetration of roof top photovoltaic systems. The transformer loads and the phase distribution of the PV systems are significantly unbalanced. Oil and hot-spot temperature and remnant life of distribution transformer under different PV and balance scenarios are calculated. It is shown that PV can significantly extend the transformer life.
Number of Pages9
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External Author AffiliationsPower and Energy Centre; Queensland University of Technology; School of Engineering and Technology (2013- ); TBA Research Institute;