Case Analysis of Dielectric Loss Data Abnormality in Online Monitoring of Transformer Bushing
Bushings are important accessories covering the outward high-voltage wires in transformers,and their safety is crucial for safe and stable operation of transformers and even networks.Therefore it is necessary to strengthen online mo-nitoring data analysis of transformer bushings for timely detection of potential defects.This paper focuses a case of dielec-tric loss data abnormality encountered by an online-monitored 110 kV transformer bushing,and analyzes the influences of instruments,environmental factors,system voltage,bushing defects,etc.on the online measurement results.It reports the conclusion made through experiment and analysis that system voltage harmonics and frequency changes were the main causes for the data abnormality.It also puts forward relevant suggestions for daily operation and maintenance of trans-former bushing online monitoring devices.
transformer bushingonline monitoringdielectric loss