20 kV–380 kV Grid Connection Engineering
From the first concept to the signed grid connection contract – we deliver the complete design of your grid connection.
01
Applications
Battery Energy Storage Systems
Solar PV
Wind Power
Data Centers
02
Scope of Services
Our services by project phase
We offer our customers the complete design service – from the first draft through the grid connection application to the signed grid connection contract.
1
Concept Planning
- Grid connection and building permit applications
- Preliminary environmental assessment report and feasibility study
- Initial plant concept: single-line diagram, metering concept, component selection
- Overall layout, 3D visualization and preliminary noise simulation
2
From Capacity Commitment to Grid Connection Contract
- P/Q calculation
- Planning documents for the building permit
- Foundation design and overhead line connection concept
3
From Contract to Construction Start
- Detailed electrical design: installation, schematic and wiring diagrams
- Verification calculations: short-circuit current, earthing, grid simulation
- Civil & structural design: grading, structure, architecture
- Completion of all planning documents by construction start
✓ = service included in this project phase
Planning & Permitting
| Concept Planning | From Capacity Commitment to Grid Connection Contract | From Contract to Construction Start | |
|---|---|---|---|
| Grid connection applications and formalities | ✓ | ✓ | ✓ |
| Building permit applications | ✓ | ✓ | – |
| Preliminary environmental assessment report | ✓ | – | – |
| Feasibility study | ✓ | – | ✓ |
Electrical Design
| Concept Planning | From Capacity Commitment to Grid Connection Contract | From Contract to Construction Start | |
|---|---|---|---|
| Single-line diagram (SLD) | ✓ | ✓ | ✓ |
| Metering concept (metering diagram) | ✓ | ✓ | ✓ |
| Equipment installation drawing | – | ✓ | ✓ |
| Schematic diagram (secondary systems) | ✓ | ✓ | ✓ |
| Wiring diagram (secondary systems) | – | ✓ | ✓ |
| P/Q calculation | ✓ | ✓ | ✓ |
| Short-circuit current calculation | – | – | ✓ |
| Earthing simulation (calculation report) | – | – | ✓ |
| Preliminary grid simulation | – | – | ✓ |
| Selection of grid connection components | ✓ | ✓ | ✓ |
Civil & Structural Design
| Concept Planning | From Capacity Commitment to Grid Connection Contract | From Contract to Construction Start | |
|---|---|---|---|
| Overall plant layout | ✓ | ✓ | ✓ |
| Planning documents for the building permit | ✓ | ✓ | ✓ |
| Site grading design | – | – | ✓ |
| Structural design | – | – | ✓ |
| Architectural design | – | – | ✓ |
| Foundation design | – | ✓ | ✓ |
| Overhead line connection concept | ✓ | ✓ | ✓ |
| 3D visualization of the entire plant | ✓ | ✓ | ✓ |
| Preliminary noise simulation | ✓ | ✓ | ✓ |
Simulation & Grid Compliance Studies
Beyond the verification deliverables listed in the service matrix, we offer detailed simulation and modeling services:
Substation & Plant Modeling
Entire substation & plant modeling based on the specific equipment models (e.g., PCS, transformers).
Our simulation tools:
Simulation & Performance Analyses
- Load flow analysis and short-circuit current contribution
- Power quality assessment (including harmonic analysis)
- Active and reactive power regulation
- Fault Ride-Through (FRT) (covering both RMS and EMT domains)
- Simulation-based protection setting and coordination
- Grid Forming Capability assessment
Structural analysis & static verifications for substations
- 3D modeling and FEM analysis of the primary structure (DIN EN 1993)
- Load calculation for conductors, earth wires and insulator strings (DIN EN 1991 / DIN EN 50341)
- Combination of wind, ice and temperature actions
- Joint design and weld verification for steel tube/angle sections (DIN EN 1993-1-8)
- Foundation anchorage, supports and coordination with lightning protection/earthing
- Hot-dip galvanizing and long-term durability (DIN EN ISO 1461)
03
Reference Grid Operators
Proven with Leading Grid Operators
Related: How a plan becomes a substation → Substations 110/380 kV