在役电力变压器经济寿命评估

Economic Life Evaluation of Power Transformer in Service

从变压器经济运行的角度,提出变压器经济寿命的概念,并给出在役变压器经济寿命的评估方法。该方法综合考虑了影响在役变压器运行经济性能的多种因素,并通过优化后的综合经济效益指标,对变压器的经济寿命进行定量评估。评估过程可以灵活选择不同参照变压器和不同时间点进行横向动态比较,评估结果可以清晰地给出在役变压器在不同时间点更换为参照变压器时的净效益值、更换净效益值最大时的最佳经济寿命、更换净效益值超过设定的期望值所对应的经济寿命区间等信息。算例结果表明,该方法正确有效。

This paper proposed a concept and an evaluation method of economic life from economic operation of power transformer in service. The method considered many factors which affected economical performance of power transformer in service, and evaluated power transformer＇s economic life with optimized index of synthesis economy benefit. In evaluation, different reference transformers and time points could be chosen to realize horizontal and dynamical comparisons. Evaluation results can clearly present net benefit power transformer in service replacing by reference power transformer at different time, the best economic life with maximal net benefit, and economic life range with benefit greater than some desired threshold. Examples show that the method is correct and effective.