Abstract
Power transformer serves as one of the most widely used electrical equipments in power grid. During the operation, terrible losses are produced. With the development of loss reduction technology of power transformers, in order to save energy saving and reduce emissions, the old power transformer should be replaced. The paper summarizes the main method to reduce the losses of power transformers and brings up the improved Total Owning Cost (TOC) algorithm, which applies to 220 kV power transformers’ comprehensive benefit analysis. Using the improved Total Owning Cost (TOC) algorithm, based on today 220 kV energy-saving power transformer manufacturing level, the economic benefits of new energy-saving power transformer and the return period of investment are analyzed. Finally, combined with energy-saving effect, the appropriate replacement proposal of 220 kV power transformers has been given.
Highlights
As the transmission and distribution infrastructure, power transformer is widely used and always run a long time
The paper summarizes the main method to reduce the losses of power transformers and brings up the improved Total Owning Cost (TOC) algorithm, which applies to 220 kV power transformers’ comprehensive benefit analysis
When using The Total Owning Cost (TOC) algorithm to choose 220 kV power transformers, there are some defects, which mainly embodied in the calculation for reactive economic equivalent
Summary
As the transmission and distribution infrastructure, power transformer is widely used and always run a long time. Power transformer on the one hand is high efficiency transmission electrical products, on the other hand is consumption power electrical equipment. The efficiency of the transformer can be as high as 99%, but the consumption of electric energy is still very amazing [1]. The losses of power transformer itself account for more than 3% of generation [2], carrying out power transformer comprehensive benefit calculation and putting forward reasonable replacement proposal is the important link to reduce the power loss and to achieve the results of energy saving and emission reduction
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