“三要素法”在配电变压器容量判定中的应用实践

Application Practice of “Three-Element Method” in Capacity Judgment of Distribution Transformer

现场判定变压器容量一直是供电部门关注的问题,变压器容量的确定主要通过温升试验,但是温升试验时间较长,不适用于现场进行,现场将阻抗电压、空载损耗、负载损耗三者相结合起来与国标规定值进行比较,进而可以判定变压器的容量。笔者简述变压器容量测试原理,探讨“三要素法”在变压器容量测试中的应用实践,为现场判定变压器容量提供参考性意见和建议。

On-site determination of transformer capacity has always been a concern of power supply departments.The determination of transformer capacity is mainly through temperature rise test,but the time of temperature rise test is long,which is not suitable for on-site operation.On site,impedance voltage,no-load loss and load loss are combined to compare with the national standard values,and then the capacity of transformer can be determined.The authors briefly describe the principle of transformer capacity test,discuss the application of“three-element method”in transformer capacity test,and provide reference suggestions for judging transformer capacity on site.