浅谈变压器直阻测量后消磁的必要性

On the Necessity of the Demagnetization Work after the Direct Resistance Measurement of Transformers

变压器直流电阻测量后,变压器铁芯产生的剩磁可能会造成变压器继电保护装置的误动以及一次设备的损坏。对变压器剩磁的产生原因以及剩磁对造成继电保护装置误动的典型案例进行了分析,并提出了控制和消除剩磁的方法,希望对继电保护设备以及变压器的安全稳定运行起到一定的帮助作用。

According to the analysis of typical cases,it is found that the remanence in the transformer iron core after the direct resistance measurement may cause the malfunction of the relay protection device and damages of the primary equipment. Possible causes of the transformer remanence are analyzed. Then,control and demagnetization measures are proposed. It could be useful reference for the safe and stable operation of the relay protection devices and transformers.