The Hawai'i Natural Energy Institute (HNEI) is developing a low-cost, high-fidelity grid power monitor to improve the visibility and control of distributed energy resources (DERs) such as rooftop photovoltaics (PV).  The device is fully integrated and weatherized for pole-top installation at distribution service transformers and other key locations near the edge of the grid.  It includes significant onboard processing capabilities, numerous communications options, precise GPS-based timing, and a low-latency messaging and controls platform.

Under this project, several devices have been deployed for up to two years to log over one billion scalar data points, including installations in project sites such as Japan, Arizona, Hawaii and demonstrations in Alaska.  End-to-end latencies (sensor to server) between 12 ms and 60 ms have been reported, even between Alaska and Hawaii.  HNEI and Arizona State University have performed an initial test of the device to control the reactive power from distributed PV inverters to minimize voltage variation on the grid.  The University of Hawaii (UH) has filed a patent application on various aspects of the device and system and is seeking commercialization partners.

More information regarding this project can be found in the Project Executive Summary & Technical Datasheet.

Point Person: Kevin Davies


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