Page 69 - Energize June 2022

falling engine RPM when the car starts
going up the hill, and, rather than waiting
for the engine to drop to a certain RPM,
the driver adds more power.
ROCOF is especially useful for
renewable generation, where the low
inertia generation causes rapid fluctuations
in frequency. By speeding up response,
ROCOF provides generators with an
increased capacity to reliably operate.

Conclusion
All these frequency features are available
in NOJA Power’s OSM Recloser system,
and many generation sites will use a Figure 3: A NOJA Power OSM recloser connecting a solar farm to the grid – a common use case for ROCOF
protection
combination of them.
Likewise, any network that wishes to “With more and more asynchronous generation being connected to the grid, frequency
implement an automatic load shedding protection is playing an even more important role in maintaining stability of the grid,” says
scheme can do so with NOJA Power OSM NOJA Power Group Managing Director Neil O’Sullivan.
Reclosers. This design can help avoid “All of NOJA Power’s full range of reclosers and recloser controls provide the complete
blackouts under generation shortfalls, suite of frequency protection required by today’s modern power grid.”
improving the power system performance
and reliability of power. To find out more, visit www.nojapower.com.au, or contact your local NOJA Power Distributor.

Figure 2: A distribution OSM recloser System – a common location for automatic load shedding achieved with under frequency protection to avoid a national blackout

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