Transformer Energy Conservation and Reconstruction Methods and Technologies in Low-voltage Area of Distribution Network

Abstract

New types of energy-saving transformers have been applied in many Chinese corporations, under this background, it’s essential to study energy conservation and reconstruction methods and techniques of distribution transformers for individual line enterprises. A brief review was made on domestic and abroad energy conservation and reconstruction methods and techniques, including transformer material optimization, life-cycle management, structure modification, condition-based maintenance, reasonable capacity selection, economic operation and reactive power compensation devices application, etc. Moreover, the economic switch method of transformer operation modes is given by a case study, and compared with conventional means. Corresponding operation losses are made in contrast, which shows large energy conservation potential exists in conventional operation modes. Another actual case is studied on transformer energy efficiency diagnosis via reactive power compensation. Finally, weak links in current transformer energy conservation and reconstruction methods are discussed. It’s concluded that new-type energy-saving transformers should be promoted vigorously in Chinese enterprises. Hence, it can fully dig energy conservation potentials and improve productive benefits for transformers, as well as give certain reference and guidance for the management departments in aspect of energy conservation and reconstruction.