Study on A United Evaluation Algorithm and Its Applications for Economic Operation of Transformer

In this paper, unified loss expressions are introduced based on the loss expression of transformer's independent operation. These unified expressions combine loss expressions of both independent and parallel operation of double winding or three-winding transformer. Based on the unified loss expression, a unified energy saved amount expression and a unified optimal load shift amount expression in peak load shifting is derived. A calculation for an example is demonstrated to show the effect of peak load shifting to transformers’ energy saving.