Systems and Methods for Energy Harvesting and Current and Voltage Measurements

摘要

A harvesting and measurement device is operable in at least a normal operation mode, a demand measurement mode, and a fault measurement mode. In the normal operation mode, the device is able to harvest energy from an associated power line and monitor current and voltage conditions through a lower power circuit. In the demand measurement mode, harvesting elements of the circuit are disabled so as not to interfere with accuracy of demand current measurements. In the fault measurement mode, one or more Hall sensors are activated such that high currents can be accurately measured.

主权项

1. A harvesting and measurement device, comprising:
a current transformer; and a device circuit coupled to the current transformer, the device circuit comprising:
an energy harvesting circuit comprising non-linear elements;a switching device coupled to the energy harvesting circuit capable of conductively coupling and decoupling the energy harvesting circuit from the device circuit;a microcontroller coupled to the switching device, wherein the microcontroller controls the switching device to couple and decouple the energy harvesting circuit from the device circuit; andat least one high current sensor coupled to the microcontroller;wherein the device circuit is operable in at least a normal operation mode, a demand measurement mode, and a fault measurement mode;wherein in the normal operation mode, the energy harvesting circuit is conductively coupled to the device circuit and the current transformer;wherein in the demand measurement mode, the energy harvesting circuit is conductively decoupled from the device circuit, and the current transformer is configured to make current readings; andwherein in the fault measurement mode, the high current sensor is energized and configured to make current readings.