Alternate voltage sensing method for increased weather robustness of ungrounded power line sensors
First Claim
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.
2 Assignments
0 Petitions
Accused Products
Abstract
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.
-
Citations
14 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A power line voltage measurement system comprising:
-
ungrounded sensors to be deployed on each phase of the power line; a collector receiving a sensor measured voltage of each phase, the collector powered from a transformer connected to the power line being monitored and including a voltage measurement circuit configured to measure the collector supply voltage; and the collector configured to; use the measured collector supply voltage to calculate an alternate voltage measurement for each phase, and detect when the sensor measured voltage for any phase deviates from the alternate voltage measurement by a threshold. - View Dependent Claims (9, 10, 11)
-
-
12. A power line measurement collector device comprising:
-
a voltage measurement circuit configured to measure a power line supply voltage powering the collector, a receiver for receiving phase voltage signals from ungrounded sensors disposed on the phases of the power line; a stored collector calibration factor for each phase; and a processor configured to; calculate an alternative voltage for each phase based on the power line supply voltage and the calibration factors; and monitor the received phase voltage signals for deviation from the alternative voltages. - View Dependent Claims (13, 14)
-
Specification