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Corona Discharge from 230kV Disconnect Switch

Corona Discharge from 230kV Disconnect Switch

Corona Discharge from 230kV Disconnect Switch

(OP)
A new 230kV vertical mounted disconnect switch was recently commissioned in a substation and we noticed that significant audible buzzing was coming from the terminals (more than you would normally expect).  I am trying to determine the source of the corona discharge and how to mitigate to a more reasonable level.  We are using single 1590 AAC single conductor for each of the terminations.

Any thoughts as to the potential sources and/or mitigation strategies?

Thanks

RE: Corona Discharge from 230kV Disconnect Switch

You might want to attach a picture of the installation.

You could buy/rent an ultrasonic camera to pinpoint the area involved.

RE: Corona Discharge from 230kV Disconnect Switch

You could use a corona camera available in the market now a days find the weakest point and then rectify.

RE: Corona Discharge from 230kV Disconnect Switch

Don't you use anti-corona rings on your terminals? You can Google it.

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