USE OF VOLTAGE PROBE TO MEASURE HIGH VOLTAGE AMPLITUDE AND PHASE TO IMPROVE ON-LINE BUSHING MONITORING RELEVANCE

摘要

A bushing system includes a bushing monitor (56) configured to monitor on-line operation of a capacitive-core bushing (10) with a test tap. The bushing monitor includes a processor (58) operatively coupled to a memory (60). The processor (58) is configured to access a voltage signal received indicating a measured voltage amplitude or phase (70) of the bushing (10). The processor (58) is configured to access a current signal received indicating a measured current amplitude or phase (68) of the bushing (10). The processor (58) is configured to determine a capacitance value and/or a power factor value (72) of the bushing (10) based on the measured voltage and the measured current values, and generate a resultant signal or output based on the capacitance value and/or the power factor value (72) of the bushing (10)