Multi-node electrical power monitoring, analysis, and related services

摘要

The operation of electrical appliances receiving electrical power from an electrical system may be indirectly monitored using monitoring units engaged with outlets on branch circuits of the electrical system. Electrical systems providing power to appliances to be monitored in accordance with the present invention may comprise split phase alternating current systems, tri-phase systems, or any other type of electrical system. Known loads may be applied to calibrate the monitoring system. The monitoring system may measure the power consumption of appliances operating on the electrical system and/or detect possible fault conditions. The application of a known load to each phase of the electrical system for calibration permits different portions of the electrical system to be isolated and, therefor, provides improved accuracy in monitoring power consumption and detection of potential fault conditions.

主权项

1. A system configured to monitor electrical devices that draw power from an electrical power network operating on multiple phases, the system comprising:
a first monitoring unit configured to engage with a first outlet of the electrical power network, the first outlet operating on a first phase of the electrical power network; a second monitoring unit configured to engage with a second outlet of the electrical power network, the second outlet operating on a second phase of the electrical power network that is different from the first phase; at least one processor configured to:
measure, during a first time period, a first set of voltage variation measurements at the first monitoring unit and the second monitoring unit;measure, during a second time period that is not coincident with the first time period, a second set of voltage variation measurements at the first monitoring unit and the second monitoring unit;determine, based on the first set of voltage variation measurements, a first set of calibration measurements;determine, based on the second set of voltage variation measurements, a second set of calibration measurements;measure, at a first plurality of time periods not coincident with either of the first time period and the second time period, a third set of voltage variation measurements;calculate, based at least in part on the first set of calibration measurements, the second set of calibration measurements, and the third set of voltage variation measurements, an amount of power consumed by an electrical device connected to the electrical power network; andoutput the calculated amount of power consumed by the electrical device.