Condition Monitoring of Power Transformers

Continuous monitoring of the condition of high voltage power apparatus is necessary to ensure reliable supply of electrical power. The purposes of condition monitoring are the following Detecting incipient faults and thereby avoiding catastrophic failure of the equipment and Developing a data base which helps in more accurate failure analysis thereby improving reliability of service.

Condition monitoring can be done in energised as well as de-energised condition and can be done off-line or on-line. Ideally, online monitoring with HV equipments energised is the best as it has the potential to detect faults at the incipient stage and does not involve any down time.

In this talk, we shall consider condition monitoring of a power transformer. Similar suitable techniques can be adopted for other High Voltage Power Apparatus also.