王云涛 张涓笑 魏志刚 王继文（中国建筑西北设计研究院有限公司，西安市 710018）

王云涛   张涓笑   魏志刚   王继文

TOC - Based Calculation of Optimal Load Factor for Transformers

with Different Energy Efficiency Grades

WANG Yuntao ZHANG Juanxiao WEI Zhigang WANG Jiwen

(China Northwest Architectural Design and Research Institute Co.,Ltd.,Xi’an 710018，China)

Abstract：With the transformer technology being continuously improved,it is found that the results of the traditional calculation method for the recommended load factor for the economic operation of transformers are rather low. In this paper,the TOC method is adopted to analyze the critical load factors of transformers having the same capacity but with different energy efficiency grades throughout the full life cycle. By studying the load factor for the economic operation of transformers,a load factor calculation method is proposed to achieve the lowest operating cost for output per unit of a transformer,together with the proposal of a transformer optimal load factor distribution strategy using PSO. Finally,the load of a museum is analyzed as a suitable case.

Key words：dry‑type transformer;optimal load factor;TOC method;energy efficiency grade;critical load factor;economic analysis;civil building;PSO

摘　要：随着变压器工艺水平的不断提升，传统变压器经济运行推荐负荷率β的计算方法存在结果偏低的问题。本文从经济角度出发，基于TOC法，对全寿命周期内相同容量、不同能效等级变压器间的临界负荷系数展开分析，并对变压器的经济运行负荷率进行研究，提出一种变压器单位出力运营成本最低的负荷率计算方法，以及一种基于粒子群算法的变压器最优负荷率分布策略，最后以某博物馆负荷为例进行算例分析。

关键词：干式变压器；最优负荷率；TOC法；能效等级；临界负荷系数；经济分析；民用建筑；粒子群算法

中图分类号：TU852                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.11.008