Grid Code compliance and EZA controller

Grid Code compliance, connecting generation units to the public grid

Connecting generation units to the public grid requires compliance with local grid-code rules and the requirements of the responsible network operator. In Germany, VDE-AR-N 4110 (medium voltage) and VDE-AR-N 4120 (high voltage) apply; in the UK, EREC G99 applies to generators and energy storage running in parallel with the distribution network; other countries apply their own connection rules.

SYMAP^® Compact+ GC combines protection, network decoupling, metering, automatic synchronization and Power Plant Controller functions in a single platform. Per the manufacturer's documentation, SYMAP^® Compact+ GC has Grid Code Compliance for VDE-AR-N 4110:2018-11 (medium voltage) and VDE-AR-N 4120:2018-11 (high voltage), both FGH-certified, with G99 support. Available GC functions include NA protection, QU protection, EZA/PPC active and reactive power control, Q(U), P(f), ROCOF and communication to higher-level systems.

The final configuration depends on the voltage level of the point of connection, plant size, type of generation units, metering topology at the PCC and requirements of the responsible network operator.

Typical applications

Solar plants — PV

Utility-scale and commercial PV installations. Grid Code compliance per VDE-AR-N 4110/4120, plant controller for parks with multiple inverters, Q/P regulation per DSO requirements.

Wind farms — onshore and offshore

Onshore and offshore wind farms with full Grid Code compliance. Fault ride-through (FRT), reactive power management, plant controller coordinating multiple turbines.

Biogas and CHP plants

Biogas, natural-gas CHP, landfill and sewage gas. Parallel operation with the grid, NA protection, synchronisation, EZA controller documentation for the DSO.

Small hydropower plants (MHE)

Run-of-river and storage hydropower plants up to several MW. Generator protection, grid synchronisation, parallel operation, Grid Code documentation.

BESS — battery energy storage

Grid-connected battery storage installations. Compact+ GC for the AC grid connection (NA, Grid Code); Y-BAT for DC monitoring. SYMAP is not a BMS replacement.

Type-testing and certification

FGH-certified protection and EZA controller, tested per VDE-AR-N 4110/4120, G99, and IEC 61400-21 for wind. Full project documentation supplied to the DSO operator.

Compact+ or classic SYMAP^®?

SYMAP^® Compact+ GC is the dedicated Protection & Control IED for grid-code applications, a single device covering NA protection, EZA controller, sync-check, Q/P regulation and Grid Code logic. For projects with multiple generation units in parallel operation requiring full Power Management (load sharing, automatic load shedding, multi-source bus-tie), classic SYMAP^® BCG / ECG remains the choice.

Products covering this application

Need detailed technical specifications?

For exact protection function coverage, settings ranges, ANSI device numbers, CT/VT specifications, communication protocols and configuration support, contact our team to receive the relevant datasheet and engineering proposal.

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Grid Code compliance