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Protection testing in grid-connected
Distributed Energy Resources (DER)

Medium voltage installations

For more information, reach us

Protection testing in grid-connected
Distributed Energy Resources (DER)

Medium voltage installations

For more information, reach us

Protection testing in grid-connected
Distributed Energy Resources (DER)

Medium voltage installations

For more information, reach us

Larger Distributed Energy Resources (DER) generation plants, such as wind, solar or photovoltaic (PV) plants, are generally connected to the power network at the medium voltage (MV) level.

The challenge is to keep the voltage and frequency stable with a higher degree of DER plants and generate the necessary power to cover the gap for the reduced amount of large and stable generation plants.

To cope with that change, IEC released a new standard, IEC 60255-181:2019, with the focus on frequency protection, specifying relay performances and test methodologies of frequency protection schemes, including Rate of Change of Frequency (ROCOF), which Megger complies with in its solutions.

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Customers testimonials
In PV plants and substations

Protection testing
In PV plants with the SVERKER900

Protection testing
In Wind Farms with the SVERKER900

Protection in DER plants

The protection circuits and functions are very similar to regular substations at MV level. Since it is in an MV environment, the protection functions in PV farms are basic. Typically they are under/over voltage, under/over frequency, ROCOF, vector shift, and unbalance protection functions.

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Frequency protection functions

The new IEC standard affects how tests are performed on frequency protection functions, including ROCOF. For example, the standard includes a standardised formula for frequency change with smooth frequency change which better reflects the reality, and specifies test frequencies and report structures.

Self-Powered Relays (SPRs)

SPRs are frequently used since they harvest their energy from the network and don't need a DC supply to operate, keeping the costs down. Even though they normally have basic protection functions, they can be a challenge to test for modern relay testers.

Multi-functional solution for relay and substation testing in
grid-connected plants.
SVERKER900

Time-saving solution for relay protection testing in grid-connected plants.
SMRT and FREJA

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Resources

Check out these resources to get the most out of your relay protection testing
in grid-connected distributed energy resource plants.
Videos, interviews and podcasts
Latest technical information
Webinars
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cable life expectancy megger

Webinars

test for general system megger

IEC 61850 Solutions

test for new installation commissioning megger

Latest Technical Content

test for new installation commissioning megger

Videos

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