The Glass CHP · Battery storage

Grid protection relay (Q/U protection)

Ventilation/dehumidification — the silent 24/7 load, with heat recovery. Part of the glass family — like our glass BESS, biogas plant and CHP.

Grid protection relay (Q/U protection)
Outdoor air Fresh air Heat recovery Heating coil Hall Exhaust
Glass-box in 4 steps

Understand → See it live → What the AI does → Your benefit

Step 1 of 4
1
Understand
2
See it live
3
What the AI does
Your benefit

What is the grid protection relay (Q/U protection)?

> A grid protection relay for Q/U monitoring is a safety requirement according to NF C 15-100 / Enedis connection conditions for battery storage systems (BESS). It monitors reactive power (Q) and voltage (U) to ensure the stability of the interconnected grid. Without precise design of this component, there is a risk of disconnection by the grid operator, which directly limits the feed-in capability.

No own register — honestly

For this component, no own register is connected; therefore, no example value is provided here. Where the system measures, the value is read as read-only and calculated internally. It is visible via connected components.

What the AI reads in this component

What the AI reads
  • Monitoring of injected reactive power to ensure grid stability
  • Overvoltage detection (U) to protect power electronics
  • Avoiding forced disconnections by the grid operator
  • Assurance of injection authorization by compliance with Grid Codes
Scenario

Monitored: continuous

The scenario: > Monitored: continuous · Grid Point & PCS The scenario: an unchecked peak defines the annual maximum value, resulting in a higher power price for twelve months. The AI: detects the rising edge early and discharges against it — the peak does not occur. It identifies the trend before the limit is reached.

Why it is important

Precise configuration of Q/U protection prevents unpredictable disconnections and ensures maximum availability of the feed-in power. By complying with NF C 15-100 / Enedis connection conditions, the operating permit remains stable. This minimises the risk of penalties and maximises the daily amount of energy available to achieve profitability. avoided peak (kW) · power price (€/kW·a) → — €/year Calculation: avoided peak × power price

More pool worlds

Browse the 40 wizards

← PreviousFresh air▦ All 40
License the software

Bring the glass-box AI to your pool.

Stromfee.US licenses the pool & wellness HVAC AI — proven in Europe, deployed on your existing plant. Single property, portfolio or chain.

Request software license →
Standards & norms

What the rules require — Grid protection relay (Q/U protection)

Grounded in the applicable national standards for battery energy storage systems. Same knowledge base as the European reference plant; presented anonymously.

Basis: the applicable national standards. Values shown are those measured on the plant, not target figures.