HJ-CSS-R Series Renewable Energy Step-Up Substation
Up to 40.5kV / 6300kVA / Solar & Wind Ready / Plug & Play
The HJ-CSS-R Series Renewable Energy Step-Up Substation is a heavy-duty, highly integrated turnkey solution engineered specifically for utility-scale photovoltaic (PV) and wind power generation. It seamlessly aggregates low-voltage AC power from solar inverters or wind turbines (up to 1.14kV) and steps it up directly to medium-voltage transmission grids (up to 40.5kV). Housed in an extreme-weather enclosure, it guarantees maximum energy yield and grid compliance with minimal on-site civil works.
Ideal for Utility-Scale Renewable Projects:
- ✓ Large-Scale Ground-Mounted Solar Farms
- ✓ Onshore Wind Power Generation Plants
- ✓ Floating Solar PV Installations
- ✓ Hybrid Renewable Microgrids & Energy Storage (BESS)
1. Massive Capacity & Wide Voltage Tolerance
Engineered to handle the massive and fluctuating power outputs of modern renewable farms. The HJ-CSS-R boasts an extraordinary capacity range from 500kVA up to 6300kVA. It effortlessly steps up customized low inverter voltages (e.g., 0.315kV, 0.4kV, 0.8kV, 1.14kV) directly to standard MV grid voltages (up to 40.5kV), minimizing transmission losses.
2. Extreme Environmental Resilience (IP68 Tank)
Renewable projects are often situated in the world's harshest terrains. The HJ-CSS-R is built to survive. The main transformer oil tank achieves an unprecedented IP68 waterproof rating, while the MV/LV compartments maintain strict IP54 protection. It operates flawlessly in extreme ambient temperatures ranging from -40°C to +85°C, high altitudes up to 3000m, and intense wind speeds up to 35m/s.
3. Optimized "Linear" & "Triangle" Layouts
Space and thermal management are highly optimized. Depending on site constraints and cable routing, the substation can be configured in a "Linear" (M-Type / 目字形) or "Triangle" (P-Type / 品字形) layout. This ensures superior natural and forced-air cooling for the transformer while providing safe, spacious access for maintenance personnel.
4. Dedicated Premium Protection Components
Equipped with specialized high-voltage current-limiting fuses (XRNT series) capable of breaking up to 31.5kA fault currents. Furthermore, it incorporates gapless metal-oxide surge arresters (YH5WZ series) to provide ultimate defense against lightning strikes and devastating switching overvoltages common in vast solar/wind arrays.
Global Factory Acceptance & Turnkey Support
Every HJ-CSS-R unit undergoes rigorous factory acceptance testing (FAT), simulating the exact thermal loads and harmonic conditions of your specific inverters. We deliver this massive system as a Completely Built Unit (CBU) on a heavy-duty steel skid. Simply crane it onto the concrete pad, connect the MV/LV cables, and instantly synchronize your renewable plant to the grid.
Technical Specifications
(Note: Parameters cover heavy-duty configurations for Solar and Wind applications. Specific inverter integration, SCADA communication, and dimensions are customized based on the EPC project scope.)
| Transformer Rated Capacity | 500kVA – 6300kVA |
| High Voltage (Grid Side) | 12kV / 24kV / 35kV / 36.75kV / 38.5kV / 40.5kV |
| Low Voltage (Inverter/Turbine Side) | 0.27kV / 0.3kV / 0.315kV / 0.4kV / 0.8kV / 1.14kV |
| Rated Frequency | 50 Hz / 60 Hz |
| Transformer Vector Group | Yd11 / D11 (Customizable) |
| MV Protection (Fuses) | XRNT series High-Voltage Current-Limiting Fuses (Breaking 31.5kA) |
| MV Surge Protection | YH5WZ series Gapless Metal-Oxide Surge Arresters |
| Enclosure Protection Degree | Transformer Oil Tank: IP68 MV/LV Compartments: IP54 |
| Structural Layout Options | "P-Type" (Triangle) / "M-Type" (Linear) |
Extreme Operating Environment
- Ambient Temperature Range: -40°C to +85°C.
- Altitude: ≤ 3000m without derating.
- Maximum Wind Speed: Withstands wind speeds up to 35m/s.
- Seismic Resilience: Horizontal acceleration 0.3m/s²; Vertical acceleration 0.15m/s² (Class III).
- Installation Requirements: Designed specifically for harsh outdoor environments (deserts, plains, coastal areas).
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