Application of Vibration Analysis in Transformer Fault Diagnosis and Hidden Peril Management

Abstract

The paper proposes a diagnosis technique for transformer faults and a technological process for hidden peril management based on vibration analysis by analyzing pluses and minuses of conventional fault test methods for transformers. Through vibration spectrum， the cause of a slight increase in acetylene content of a UHV reactor is analyzed and the fault source is fitted， analyzed and located based on the amplitude trend distribution； through on-site modal testing， the inherent frequencies of structural components are obtained to diagnose and precisely control structural resonance faults of the main transformer cooler of a converter station； through vibration monitoring， the impact on the surrounding transformers when the ±800 kV Fulong-Fengxian DC system is put into operation and in the case of single and double pole operation is analyzed to provide data support for the safe and stable operation of equipment. The transformer fault diagnosis and hidden peril management of transformer based on vibration analysis enable fault diagnosis in the early stage and rids equipment of damages from grid disturbance.

Keywords

• transformer
• vibration test
• fault diagnosis
• structural resonance
• partial discharge
• unipolar operation
• hidden peril management