配電變壓器標識容量小于真實容量的判斷方法
周國良1,李特1,謝成1,章錫明2
1 國網(wǎng)浙江省電力科學研究院,浙江 杭州 310014; 2 國網(wǎng)浙江省電力公司杭州供電公司,浙江 杭州 310009
摘 要:針對配電變壓器大容量標成小容量問題,對累積的抽檢試驗數(shù)據(jù)進行了分析,闡述了配電變壓器直流電阻、空載損耗、負載損耗與配電變壓器容量的關系,并提出了配電變壓器容量錯標的綜合判斷方法。試驗結果表明,綜合利用直流電阻、空載損耗、負載損耗試驗數(shù)據(jù)可較為可靠地判斷配電變壓器標示容量是否小于實際容量。
關鍵詞:配電變壓器;容量錯標;直流電阻;空載損耗;負載損耗
中圖分類號:TM421 文獻標識碼:B 文章編號:1007-3175(2015)04-0031-04
Judge Method for Wrong-Labeled Capacity of Distribution Transformer
ZHOU Guo-liang1, LI Te1, XIE Cheng1, ZHANG Xi-ming2
1 State Grid Zhejiang Electric Power Research Institute , Hangzhou 310014, China; 2 State Grid Hangzhou Electric Power Supply Company, Hangzhou 310009, China
Abstract: For the problem of large capacity distribution transformer marked as a small capacity, this paper analyzed the accumulated sampling test data, described the relationship among DC resistance, no-load loss, load loss and variable capacitor of distribution transformer, and put forward a comprehensive judgment method of distribution wrong-labeled capacity. The test result shows that the comprehensive utilization of DC resistance, no-load loss and load loss test data can more reliably determine whether the distribution transformer capacity labeled is less than the actual capacity.
Key words: distribution transformer; wrong-labeled capacity; DC resistance; no-load loss; load loss
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