Transmission System
Operators

Delivering the world’s first accurate and continuous inertia measurement service

Giving TSOs Unique Insights

GridMetrix® enables TSOs to move from increasingly inaccurate inertia models to real-time, direct inertia measurements.

As we move rapidly towards renewables 2.0, this real-time visibility of critical network conditions will empower TSOs to make key commercial and operational decisions faster, safer and more cost-effectively.

Reactive, together with our partners, National Grid ESO and Tokyo Electric Power Company, are setting the global power grid inertia standards for the next generation of system stability management.

inertia measurement renewables

National Grid and Reactive – Developing World Leading Solutions

Duncan Burt, Acting Director of Operations at National Grid in the UK, discusses the fruitful relationship between Reactive Technologies and National Grid ESO that has led to two technological world firsts.

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Estimation Methodology Summary

The three inertia estimation models shown in the table below provide static and historic views of system stability only. None offer a controllable, accurate and continuous view of inertia from transmission, distribution and demand – a view needed by grid operators to safely integrate greater amounts of renewable generation and maintain system resilience. An innovative direct and continuous inertia measurement methodology powered by Reactive technology now, for the first time ever, enables TSOs to have a real-time, accurate view of inertia.

MethodContinuous
results		Transmission
inertia		Distribution
inertia		Accurate Power
measurement		Enough data to understand inertia patternsAccurate RoCoF
Measurement
Summing inertia across all synchronous generatorsN/AN/A
Calculating RoCoF during large frequency excursions
Estimation based on power events throughout the day
gridmetrix logoReal-time inertia measurement

Transformative for TSOs

GridMetrix® gives TSOs the inertia visibility they need to operate their systems in the new, more
intermittent energy mix.

proven technology

Proven
Technology

Deployed and successfully demonstrated internationally with multiple TSOs with highly accurate results delivered

increased renewable integration

Increased Renewables Integration

An accurate view of inertia will allow TSOs to reduce the need to curtail intermittent generation in lieu of fossil fuels and ultimately accommodate more renewables.

decreased spend

Decrease Unnecessary
Spend

By better understanding their grids, TSOs will be able to make more informed procurement decisions.

secure clean tech

Maintain Security
of Supply

Having real-time visibility events propagating through their networks will allow TSOs to take optimal mitigation/recovery steps and continue to keep the lights on.

Grid

“National Grid is proud to be at the forefront of the energy revolution as we enable the uptake of renewable generation…being part of this innovative project to continuously measure inertia will improve our understanding of how to monitor grid stability in a changing energy environment.”

Duncan Burt Director of System Operations at National Grid ESO

Grid

“We are very pleased to have partnered with Reactive to successfully complete this pioneering inertia measurement demonstration project on Nii-jima Island, the first of its kind undertaken in Japan. We appreciate the advanced technology of Reactive.”

Jun Johkaji Vice President at TEPCO Research Institute

gridmetrix inertia measurement technology

gridmetrix logo

GridMetrix for TSOs

Reactive’s novel intentional power stimulation method is combined with bespoke gridedge measurement units and a cloud analytics platform. This delivers Transmission System Operators unparalleled visibility of inertia.

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Downloadable resources

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    GridMetrix Flyer

    Overview of Technology Benefits

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    Cigre Paper

    Reactive's paper on inertia measurement

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