变压器直流电阻误差超标的研究

Analysis and Discussion of Transformer DC Resistance Error Exceeding Standard

直流电阻试验是现阶段变压器预防试验中十分重要的试验项目之一,其可以直接反映变压器是否存在匝间短路、绕组和引出线断股、分接开关接触不良、各部分导电回路连接处接触不良等情况,有助于及时发现变压器的潜伏性故障。本文针对变压器试验中直流电阻误差超标的原因进行有效的分析,并根据发现的问题及分析结果给出相应合理化的排障思路或建议。

The DC resistance test is one of the most important test items in the current transformer prevention test.It can directly reflect whether the transformer has inter-turn short circuit,the winding and the lead wire are broken,the tap switch has poor contact,and the various parts of the conductive circuit are connected Poor contact,etc.,is helpful to find latent faults of the transformer in time.In this paper,the effective test and analysis of the cause of the DC resistance error in the transformer test are carried out,and the corresponding troubleshooting ideas or suggestions are given according to the discovered problems and the analysis results.