A self-adjusting voltage filtering technique compensating...

Details A self-adjusting voltage filtering technique compensating... A self-adjusting voltage filtering technique compensating...

H - Electricity

02

J

H02J 3/00 (2006.01) H02H 7/26 (2006.01) H03H 17/02 (2006.01)

Patent

CA 2625448

A method of digitally correcting the raw output voltage (605) from a Capacitive Voltage Transformer (CVT) with the intent to remove transient components impacting on transient accuracy of protection function. A typical CVT is represented using three parameters in the linear CVT model. A digital filter (608) designed based on the three parameters and incorporating a dedicated mechanism to ensure numerical stability of the former. A method of self-adjusting the said filter based on system events and performed after the method has been deployed in the field and supplied from a specific CVT.

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