基于经济负荷率的变压器容量计算与应用
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关键词：最优负荷率；最大负载损耗小时数；变负荷；经济选型
中图分类号：TM406 文献标志码：A 文章编号：1003-5168（2025）08-0010-05
DOI： 10.19968/j.cnki.hnkj.1003-5168.2025.08.002
Calculation and Application of Transformer CapacityBased on Economic Load Factor
LI Ming'SUN Jingjing²CUI Jiawen'DU Shengfei1 （1.The Fourth Research and Design Engineering Corporation of CNNC，Shijiazhuang O5o021， China; 2.State Grid Shijiazhuang Luancheng District Power Supply Company，Shijiazhuang O51430， China）
Abstract： [Purposes] In the design of power system， transformer capacity selection and number calculation is a very important content.At present，the calculation of transformer capacity does not consider the actual operating conditions，and only the optimal eficiency is used to calculate the load rate.Therefore，a transformer capacity calculation method based on economic load rate is proposed.[Methods] Based on the best effciency，a method of obtaining the economic load rate of a single transformer by considering the load characteristics and operating conditions of the maximum load loss hours and daily load loss is proposed，and the critical power for the economic operation and switching of multiple transformers of the same capacity with dual-winding is derived.The process is complete and the conclusion is accurate，and is suitable for the calculation of transformer capacity and number of 1OkV transformers.[Findings] Through an engineering example， the critical power for the economic operation and switching of multiple transformers of the same capacity with dual-winding is calculated by using the daily load loss，and accurate economic selection resultsare obtained.[Conclusions] The feasibility and promotability of economic load ratecalculation of transformer capacity in practiceare verified，and theoretical and practical references are provided for the selection design of 1 0 k V transformers in future engineering. Keywords： optimal load factor; maximum load loss hours; variable load; economic selection
0 引言
变压器的经济选型对降低电力系统网损具有积极的意义，通过对变压器容量的合理选择能有效降低损耗，提高整个系统运行的经济性[1。（剩余3649字）