An Evaluation of Amorphous Transformers Using the Load Curve Pattern Model for a Pole Transformer

摘要

Energy loss in transformers is composed of no-load loss and load loss. The no-load loss of amorphous transformers, which have amorphous metal core, could be reduced by about 70% compared with traditional silicon steel transformers. If the electrical utilities adopted amorphous transformers as pole transformers, major energy savings and CO{sub}2 emissions reduction could be achieved. However, amorphous transformers have the disadvantages of high capital cost and high load loss parameters compared with traditional transformers. The economic efficiency of transformers is evaluated by the Total Ownership Cost (TOC). The TOC encompasses both the capital cost and the energy loss cost, which is calculated from the load curve. Therefore, we propose a load curve pattern model for pole transformers to evaluate the energy-saving effect and the economic efficiency of amorphous transformers. Simulation results show that the no-load loss accounts for a large share of the total loss; hence, reduction of the no-load loss is more effective than reduction of load loss in achieving energy saving. As a result, amorphous pole transformers are the most suitable for pole transformers.