Prefabricated Substation For New Energy
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Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of prefabricated substation for new energy in China. If you're going to buy customized prefabricated substation for new energy made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.
As the global transition toward decarbonization accelerates, renewable generation assets are increasingly deployed in remote and challenging environments - particularly offshore. A purpose-built offshore renewable energy substation must withstand salt spray, high humidity, extreme wind loads, and seismic activity while maintaining uninterrupted power transmission to shore.
GNEE Electric addresses these demands with modular designs certified for marine installation, advanced corrosion protection (ISO 12944 C5-M), and a proven track record across Asia, Europe, the Middle East, and South America.
Whether you require a containerized new energy prefabricated substation for a 50 MW solar plant or a fully engineered offshore wind substation platform for a 1 GW wind farm, GNEE Electric delivers end-to-end solutions - from feasibility study and electrical design to manufacturing, testing, sea transport, installation, and commissioning.
Key Features & Advantages
Factory-Assembled & Tested
All components - transformers, switchgear, inverters, control panels - are assembled, wired, and fully type-tested in our factory. Customers receive a pre-commissioned unit, reducing on-site installation time by up to 70%.
Offshore-Grade Durability
Enclosures are engineered to DNVGL-OS-C401 with C5-M marine corrosion protection (epoxy zinc-rich primer + multi-layer polyurethane topcoat), IP55+ ingress protection, and anti-condensation heating for harsh offshore renewable energy substation deployment.
Modular & Transportable
Skid-mounted and ISO container form factors enable transport by road, rail, or vessel. Modules can be stacked or arranged in parallel to scale capacity from 1 MVA to 200+ MVA as project demand grows.
High-Efficiency Transformers
Step-up transformers feature low-loss silicon-steel core and NOMEX insulation, achieving efficiency ratings above 99.3% at rated load. On-load tap changers (OLTC) ensure stable grid voltage compliance.
IEC 61850 Smart Control
Full digital substation automation with IEC 61850-compliant protection relays, SCADA integration, and remote monitoring via secure VPN - enabling predictive maintenance and real-time performance analytics.
Custom Engineering
Every offshore wind power solution is tailored to site-specific conditions: water depth, metocean data, grid code, transformer capacity, and cable interface. Our engineering team provides stamped drawings and full documentation packages.
Technical Specifications
The following parameters represent typical configurations. All values can be customized to meet specific project requirements and local grid codes.
| Parameter | Onshore Model | Offshore Model |
|---|---|---|
| Rated Voltage (HV Side) | 10 kV - 110 kV | 66 kV - 220 kV |
| Rated Voltage (MV Side) | 0.69 kV - 35 kV | 6 kV - 66 kV |
| Transformer Capacity | 1 - 100 MVA | 50 - 200 MVA |
| Transformer Type | Oil-immersed / Dry-type | Oil-immersed (ester or mineral) |
| Cooling Method | ONAN / ONAF / AF | ONAF / ODAF |
| Switchgear Type | Gas-insulated (SF6/N2) | Gas-insulated (SF6/N2) |
| Protection Level | IP44 - IP54 | IP55 - IP66 |
| Corrosion Protection | ISO 12944 C3 - C4 | ISO 12944 C5-M (Marine) |
| Communication Protocol | IEC 61850 / Modbus / IEC 60870 | IEC 61850 / Modbus / IEC 60870 |
| Operating Temperature | -25 C to +45 C | -25 C to +45 C |
| Enclosure Material | Galvanized steel / Concrete | Marine-grade steel / GRP |
| Design Lifetime | 30 years | 30 years (offshore-rated) |
| Applicable Standards | IEC 62271, IEC 60076, IEEE 1547 | IEC 62271, IEC 61400, DNVGL-OS-C401 |
Applications
GNEE Electric new energy prefabricated substations serve a wide range of renewable generation scenarios. Each system is engineered for the specific environmental, electrical, and logistical demands of the site.
Offshore Wind Farms
Centralized offshore wind substations collect 33-66 kV inter-array power from wind turbine generators (WTGs), step up to 132-220 kV, and export to onshore grid stations via submarine cables. GNEE Electric provides topside-mounted and floating-platform substation designs.
Offshore Renewable Energy
For offshore solar, tidal, and wave energy projects, GNEE delivers offshore renewable energy substations with specialized cable management, anti-fouling protection, and corrosion-resistant enclosures designed for continuous marine immersion zones.
Utility-Scale Solar PV
Skid-mounted and containerized prefabricated substations for new energy serve as central collecting stations for large solar plants (10-500 MW), integrating inverters, step-up transformers, and MV switchgear into rapid-deploy modules.
BESS & Hybrid Systems
Energy storage systems (BESS) paired with solar or wind generation require dedicated prefabricated substations with PCS, battery racks, and fire suppression. GNEE provides integrated BESS substation containers up to 20 MVA per unit.
Offshore Wind Power Solution: Engineering Deep Expertise
Offshore wind represents the fastest-growing segment of global renewable energy deployment, with project capacities now exceeding 1 GW and water depths reaching 60+ meters. A reliable offshore wind power solution demands more than standard substation hardware - it requires purpose-engineered platforms that integrate structural, electrical, and marine engineering disciplines.
Platform Topologies
- Bottom-fixed (jacket) substation: Steel jacket foundation for water depths of 20-60 m; topside houses HV transformers, GIS switchgear, and auxiliary systems.
- Floating substation: Semi-submersible or spar-type hull for deep water (>60 m); moored to seabed; ideal for far-from-shore offshore renewable energy substation projects.
- Containerized modular substation: ISO-container form factor for smaller offshore pilot projects or inter-array collection points; crane-deployed onto existing platforms.
Critical Offshore Design Considerations
- Corrosion protection: All external steel surfaces treated to ISO 12944 C5-M (very high durability, marine). Internal surfaces use C4 coating. Cathodic protection (sacrificial anode or impressed current) for submerged structures.
- HV cable systems: Submarine cable terminations engineered for dynamic loads from wave action and platform motion. J-tube or cable hang-off systems designed per DNVGL-ST-0341.
- Fire & safety: A60 fire-rated bulkheads, gas detection (SF6 leak monitoring), deluge fire-fighting systems, and safe-area refuge compartments compliant with DNVGL-OS-D301.
- Helideck & access: Optional helideck for crew transfer; boat landing with fenders for crew vessels; crane capacity 10-50 t for module maintenance.
- Reactive power compensation: STATCOM or SVC integration for long HVAC export cable runs; HVDC converter platform option for projects >200 km from shore.
Project Delivery Process
Every offshore wind substation project follows a structured, multi-stage delivery process to ensure technical compliance and schedule certainty:
Phase 1 - Feasibility & Concept Design: Site assessment, metocean data analysis, grid-connection study, platform sizing, and cost estimation.
Phase 2 - Basic & Detailed Engineering: Structural, electrical, and mechanical design; 3D modeling; engineering review by DNV/BV/ABS as required.
Phase 3 - Manufacturing & FAT: Fabrication of topside, jacket, and all electrical modules; factory acceptance testing with witness by owner and third-party inspector.
Phase 4 - Transport & Installation: Sea transport via heavy-lift vessel; offshore installation by DP2 installation vessel; cable pull-in and termination.
Phase 5 - Commissioning & Handover: System energization, protection coordination testing, SCADA integration, and performance trial run.
Why Choose GNEE Electric?
Global Project References
Substations deployed across Asia-Pacific, Europe, Middle East, and South America. Experience with grid codes in the UK, Vietnam, Philippines, UAE, Brazil, and more.
Full Certification Package
Type test reports from KEMA, CESI, and CPRI. Third-party inspection by SGS, BV, DNV, ABS. Full documentation pack for grid-connection application.
Competitive Lead Time
Onshore models: 8-12 weeks. Offshore models: 6-10 months. Standardized modules reduce engineering hours while custom interfaces accommodate project-specific requirements.
Lifetime Support
Spare parts guarantee for 20 years. Remote diagnostics via SCADA. On-site maintenance teams in key regions. 24/7 technical hotline for fault response.
Frequently Asked Questions
A prefabricated substation for new energy is a factory-assembled, transport-ready power conversion and transformation system designed specifically for renewable energy applications such as offshore wind, solar PV, and energy storage. It integrates step-up transformers, medium-voltage switchgear, inverters, SCADA systems, and auxiliary equipment into a single compact enclosure - either skid-mounted, containerized, or purpose-built for offshore platforms - enabling rapid deployment and grid connection.
An offshore renewable energy substation collects medium-voltage AC power from multiple wind turbines or tidal/wave generators via inter-array submarine cables, steps up the voltage to high voltage (typically 66 kV to 220 kV or higher) through offshore transformers, and transmits the bulk power to shore through export submarine cables. It also houses protection, control (IEC 61850), reactive power compensation, and auxiliary systems designed for the harsh marine environment.
GNEE Electric offshore wind substations are designed and tested in accordance with IEC 62271 (high-voltage switchgear and controlgear), IEC 60076 (power transformers), IEC 61850 (substation communication), IEEE 1547 (interconnection), and applicable offshore standards including IEC 61400 (wind turbines) and DNVGL-OS-C401 (offshore structures). Corrosion protection follows ISO 12944 Category C5-M for marine environments.
GNEE Electric new energy prefabricated substations cover voltage classes from 10 kV to 220 kV on the high-voltage side and 0.69 kV to 35 kV on the medium-voltage side, with transformer capacities ranging from 1 MVA to 200 MVA. Custom voltage configurations are available to meet specific project grid-connection requirements.
Yes. Each prefabricated substation for offshore new energy is custom-engineered to project-specific requirements, including platform topology, water depth, environmental conditions (salt spray, humidity, wind loads), transformer capacity, voltage class, protection scheme, and grid code compliance. GNEE Electric provides full turnkey engineering from feasibility study through commissioning.
For standard onshore new energy prefabricated substations, the lead time is typically 8-12 weeks from order confirmation. For offshore wind substations, the timeline ranges from 6 to 10 months depending on platform complexity, voltage class, and certification requirements. Detailed schedules are provided during the engineering phase.
Yes. GNEE Electric offers optional installation supervision, commissioning, and training services globally. For offshore projects, we partner with marine contractors for transport and installation. Full site acceptance testing (SAT) is performed with owner and third-party witness participation.
Get Your Project-Specific Quote
Share your project specifications - voltage class, capacity, environmental conditions, and grid requirements - and our engineering team will provide a tailored proposal within 48 hours.
Email: sales@gneeelectric.com | Global Technical Sales Available 24/7
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