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AI workflows · Illustrative case 02

Stability Potential: stability services from below 132 kV.

An evidence base, a working model and a procurement-ready scorecard. Together they turn distributed plant below 132 kV into a qualified source of system strength and inertia for the transmission operator.

Illustrative case. It shows what a workflow can do; it is not a client project.

Discuss a stability study Run the test
No.
02
Type
Distributed stability
Voltage
Below 132 kV
Services
Inertia, fast active power, system strength, damping, voltage
Method
RMS and EMT studies at the connection point
For
Transmission operators
Status
Illustrative
The gap

The biggest unmodelled stability resource sits below 132 kV.

System strength and inertia are bought almost entirely from synchronous plant on the transmission network. Below 132 kV, tens of gigawatts of distributed plant could provide these services but has never been qualified to.

~30 GW in scope for stability services today

  • Transmission plant 30 GW
  • Storage and grid-forming 14 GW
  • Wind 10 GW
  • Solar 9 GW
  • Synchronous condensers 2 GW
  • Flexible demand and EVs 5 GW

Illustrative split of stability-capable capacity. Each square is 0.25 GW.

Explore the fleet

What each technology can offer.

Pick a technology to see what one unit can offer across five services. The dashed outline is a synchronous condenser, the usual benchmark.

Distributed plant · stability servicesIllustrative
BESS · grid-forming capable

Battery storage

Ramps active power in milliseconds, so it is the strongest fast-frequency and damping resource. Synthetic inertia and system strength depend on grid-forming control.

Battery storage: Synthetic inertia 55, Fast active power 98, System strength 45, Damping 85, Voltage support 70Inertia55Fast power98Strength45Damping85Voltage70
Strongest at
Fast active power
Weakest at
System strength
Available below 132 kV
8 GW
Selected, per unit, 0 to 100Synchronous condenser benchmark
Each technology is qualified at its connection point through RMS and EMT studies
Put it to the test

Enrol the fleet, then stress the system.

A low-inertia day. Choose which plant below 132 kV to enrol, then watch two events play out. Try to pass both with as little capacity as you can.

Low-inertia day · two eventsFails both
Enrol plant below 132 kV
0 of 40 GW enrolled
Event 1

Lose 1,800 MW

Fails
50.049.549.048.549.2 Hz floor0 s5101520 s
Lowest frequency need ≥ 49.2 Hz
– Hz
Initial RoCoF
– Hz/s
Inertia added
– GVA·s
Event 2

Fault on a 400 kV line

Fails
1.00.60.2fault0 s123 s
Voltage during fault
– pu
System strength (SCR) need ≥ 3.0
–
Damping need ≥ 5%
–

Illustrative model. Real qualification runs RMS and EMT studies at each connection point.
What it delivers

From potential to a service the operator can buy.

  1. Delivers

    Capability evidence

    Which distributed plant can provide system strength, inertia and damping, technology by technology.

  2. Delivers

    A validated model

    Performance proven at the connection point through RMS and EMT studies.

  3. Delivers

    Procurement scorecard

    Qualified potential turned into a service the operator can actually buy.

  4. For the operator

    A new resource

    Tens of gigawatts below 132 kV, made visible and dispatchable.

    For the operator

A bespoke study and toolset built around a real operator question. Bring us yours, and we will build the analysis and the tool around it.

Next step

Bring us your operator question.

Discuss a stability study [email protected]
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