Alternate voltage sensing method for increased weather robustness of ungrounded power line sensors

摘要

A voltage sensing system and method for use with ungrounded power line sensors deployed on each phase of a power line. The voltage of each phase is measured using the sensors. This measurement is used unless there is a snow event. A collector is powered by a transformer connected to the power line being monitored and a voltage measurement circuit is configured to measure the collector supply voltage which is then used to obtain an alternate voltage measurement for each phase. When the sensor measured voltage for any phase deviates from the alternate voltage measurement by a pre-established value, a snow event has occurred and the alternate voltage measurement may then be used.

主权项

1. An alternate voltage sensing method for use with ungrounded power line sensors, the method comprising:
deploying an ungrounded sensor on each phase of a power line; measuring the voltage of each phase using said sensors; transmitting the measured voltage of each phase to a collector; powering the collector from a transformer connected to the power line being monitored; adding a voltage measurement circuit to the collector to measure the collector supply voltage; obtaining an alternate voltage measurement for each phase using the collector supply voltage; and detecting when the sensor measured voltage for any phase deviates from the alternate voltage measurement by a pre-established value.