In order to achieve the targets of economic benefit and environmentally friendly both

based on the life cycle costs（LCC）

mainly considering the energy saving factor

this paper establishes a kind of transformer scheme evaluation method. Through a comprehensive analysis of LCC

considering the dynamic effects of load loss with the load change

this paper puts forward a more perfect LCC model of transformers

and makes a correction through the discount rate and the rate of inflation. Based on the above perfect LCC model of transformers

introducing the Critical Price

the paper proposes the contrast analysis method of LCC except electric energy loss and the power loss

and implements a LCC auxiliary evaluation platform. Taking a 500 k V transformer project scheme comparison

for example

this paper demonstrates the practicability of the evaluation methodology and verifies the energy saving effect.