Analysis of Main Transformer Damage Fault Caused by Arrester Explosion
Zhu Shi-yan · 2013
To an 110 kV main transformer damage fault,the secondary fault caused by the explosion of the neural point arrester at the medium voltage side of the transformer is analyzed. The process of valve heat collapse of the neural point arrester after a series of lightning overvoltage and resonance overvoltage are analyzed. Countermeasures and suggestions against such fault are proposed from aspects of the anti-explosion design,the damage control of arrester in substation,and the restraint of 35 kV resonance overvoltage.