Impact of Electrification on Asset Life Degradation and Mitigation with DER

This paper explores whether these loading conditions, where cooling off is less substantial than at present due to electrification, is detrimental to the loss of life of distribution network assets. The paper begins with a fundamentals approach to developing an equation relating the transformer loss of life to its load curve utilization. In particular, the mathematical analysis is done using an exponential loss of life model, that relates loss of life to the internal temperature of the transformer. The evolution of the latter is based on a heat dissipation inspired equation and is affected by the internal temperature of the previous hours as well as the concurrent ambient temperatures and hourly power flow through the asset. The paper then takes the next step of calculating the value of a DER injection for lowering the flow through an asset. The DER injection valuation is calculated based on the avoided transformer replacement (or capital) costs.