System and method for providing power to a power meter connected to a power line

摘要

The disclosure relates to a meter for monitoring usage of power provided by a power transmission system to a site. The meter comprises: a meter module connected to a power feed associated with the power transmission system to provide readings relating to the power; a messaging module to provide messages to the power transmission system; a connection to an alternating current (AC) power supply; a rectifier circuit connected to the AC power supply to generate a direct current (DC) power signal; a capacitive circuit connected to an output of the rectifier circuit, the capacitive circuit including a capacitor for storing a voltage for temporarily providing replacement power for the rectifier circuit; and a switching regulator circuit connected to the output of the rectifier circuit and the capacitive circuit, the switching regulator converting the DC voltage signal to a stepped down voltage signal for the meter module.

主权项

1. A meter for monitoring usage of power provided by a power transmission system to a site, the meter comprising:
a meter module connected to a power feed associated with the power transmission system to provide readings relating to the power; a connection to a household alternating current (AC) power supply providing power to the meter; a rectifier circuit connected to the household AC power supply to generate a direct current (DC) power signal; a capacitive circuit connected to an output of the rectifier circuit, the capacitive circuit including a capacitor for storing a voltage for temporarily providing replacement power for the rectifier circuit; a switching regulator circuit connected to the output of the rectifier circuit and the capacitive circuit, the switching regulator converting the DC voltage signal to a stepped down voltage signal for the meter module; a voltage detection circuit connected to the capacitive circuit to detect a low voltage condition where an output from the capacitive circuit drops below an operational threshold for the meter and to generate a low voltage signal upon detection of the drop; and a message generation module for receiving the low voltage signal and for generation a power loss message for transmission from the meter and carried on a message carrier having a carrier frequency between approximately 2 MHz and 30 MHz to bridge a discontinuity in the power transmission system.