A State Diagnosis Method for Capacitive Voltage Transformers
Capacitive voltage transformers are widely used in power systems due to their advantages of simple manufacturing,light weight,small size,low cost,and reliable operation.The existing inspection methods mainly include periodic power outage inspections.Then,the power outage inspection cycle was around 3 years,during which the performance of the voltage transformer deteriorated and could not be detected and dealt with in a timely manner,resulting in more serious consequences.To solve this problem,this article proposes a diagnostic method based on the secondary voltage curve of voltage transformers.Through this method,the hidden danger of 27 sets of voltage transformer capacitor breakdown was discovered in a timely manner,and explained through a 221PT curve of a 220 kV station.
capacitive voltage transformerbreakdowncurvediagnosis
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