Power Measurement Ltd.

Eric K Haight

Martin A Hancock

Arthur B Wynans

Daniel Alan Cumming

Simon H Lightbody

Douglas Stephen Ransom

Colin N Gunn

John C Van Gorp

Michael Edward Teachman

J Bradford Forth

Stewart John Harding

Marc Alan Ricci

Benedikt T Huber

Andrew W Blackett

Scott Henneberry

David A Chivers

Daniel Neil Loewen

Aaron J Taylor

Hugh T Lindsay

Anthony J Howe

Brian T Nakagawa

Daniel A Cumming

Marc Ricci

A method, system and device for synchronizing a time period over which energy measurements are accumulated for an energy monitoring system including a plurality of energy monitoring devices is described. The method comprises transmitting a first radio frequency packet from a time reference device via at least a first and a second of the plurality of energy monitoring devices to a third of the plurality of energy monitoring devices. The method further comprises adjusting a time register within the third energy monitoring device based on the reception of the packet. The method further comprises accumulating a measure of energy consumption by the third energy monitoring device of a load coupled with the third energy monitoring device. The method further comprises transmitting the measure of energy consumption from the third energy monitoring device via at least a fourth and a fifth of the plurality of energy monitoring devices to a data aggregation device. The method further comprises identifying by the data aggregation device an aggregate measure of energy consumption consumed by the load over the time period.

Time coordinated energy monitoring system utilizing communications links

A power management architecture for an electrical power distribution system, or portion thereof, is disclosed. The architecture includes multiple intelligent electronic devices ('IED's') distributed throughout the power distribution system to manage the flow and consumption of power from the system. The IED's are linked via a network to back-end servers. Security mechanisms are further provided which protect and otherwise ensure the authenticity of communications transmitted via the network in furtherance of the management of the distribution and consumption of electrical power by the architecture. In particular, public key cryptography is employed to identify components of the architecture and provide for secure communication of power management data among those components. Further, certificates and certificate authorities are utilized to further ensure integrity of the security mechanism.

System and method for assigning an identity to an intelligent electronic device

An energy measurement system including a radio frequency ('RF') device powered by a solar panel. The RF device comprising a wireless communication port operative to transmit and receive communication over a wireless network of additional RF devices. The energy measurement system able to transmit energy parameters of the RF device over the wireless network.

Radio frequency device within an energy sensor system

Systems and methods for grouping mesh networks. Mesh networks enable energy data to be transferred from an energy sensing device to a destination device using various networks and reduces the need to install metering stations. Embodiments of the invention join or group mesh networks that otherwise are not able to communicate. The connections between the grouped mesh networks can be passive using directional antennas or passive antennas or active using higher power RF devices, solar repeaters, mobile mesh devices, etc. The energy data is routed in a smart manner, by performing load balancing at gateways, by monitoring the signal to noise ratio of available communication paths, etc. Mesh clusters can also be created to define low power clusters, address blocking clusters, and frequency based clusters. Grouping clusters facilitates the efficient transfer of energy data from an energy sensing device to a energy management station.

Grouping mesh clusters

An energy monitoring device including procedures for secure communication of data from the device is disclosed. The energy monitoring device includes a public/private key pair used to encrypt and/or digitally sign communications by the device. This allows the receivers of these communications to authenticate the communications to ensure that the device and/or communications have not been compromised. The energy monitoring device is further capable of communications via an ad-hoc 'mesh' network, thereby facilitating communications among devices which are substantially inaccessible due to either physical or economic limitations.

Methods and apparatus for retrieving energy readings from an energy monitoring device

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Victoria, Canada

Eric K Haight