Applying high efficiency transformers

Abstract

Manufacturers can reduce transformer energy losses by utilizing different construction materials and designs for transformer core and windings. While potential reductions in future energy prices may exist due to utility deregulation and retail wheeling of electricity, significant opportunity still remains to impact the corporate bottom line through use of improved efficiency electrical equipment. Electric power transformers may last from 20 to 50 years depending on their loading and application. Thus, the life-cycle or total owning cost must be considered during the initial investment phase to evaluate the total energy savings against the added capital expenditure for an improved efficiency transformer. This involves using an economic evaluation process known as the discounted cash flow method. Many utilities offer economic incentives to companies who implement energy conservation programs. Such programs realize the dual benefits of cost savings and environmental relief from reduced emissions. Another possible benefit is the prevention of economic losses by minimizing the probability of fuel supply curtailment. This article explores existing and future design techniques which enable efficiency improvements in various types of transformers. This work also provides detailed analysis for investment guidance regarding additional dollars chat can be justified for applying improved efficiency transformers.