NOJA Power Intelligent Switchgear

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This NOJA Power Intelligent Switchgear project aims to reduce the complexity and cost of connecting renewables to the grid, and increase the hosting capacity of distribution networks by developing, demonstrating and industrialising an economical intelligent switchgear.This device can capture high-resolution real-time network data and can provide protection, control, and monitoring solutions to facilitate the connection of renewables to the grid.Key resultsThis project successfully designed, developed, and tested intelligent switchgear products combined with unique electronic controllers that specifically target the requirements of Distribution Network Service Providers (DNSPs) to connect renewable energy resources to the electricity grid.The products can address the protection challenges associated with renewable resources integration, thus increasing the hosting capacity of the electricity network by precise wide-area measurements and real-time monitoring capabilities.The project has implemented a world-first large-scale synchrophasor measurement in a medium-voltage. The state-of-the-art recloser controller RC20, which has been designed, industrialized, and manufactured by NOJA Power, can measure and transmit high-resolution PMU data to a cloud storage with the integrated 4G modem and Sim card.The large-scale installation of RC20 units includes 50 units installed in the Energy Queensland network and another 50 units installed in AusNet Services network. The installed PMUs provide high-resolution data from these networks that tools such as SCADA are unable to provide.A comprehensive data analytics software and dashboard have been developed in this project to access, present, and analyse the generated PMU data from all the installed devices. The PMU data has been implemented for post event analysis, real-time power quality, data monitoring, alert system, stability analysis, load and network characterization, and impact of renewables on system stability and voltage profile.Further development is under way to implement PMU data in islanding detection and control of DER, accurate state estimation, protection coordination, and fault identification and location detection.

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