28 Units of S13-2500kVA/35kV Transformers Power a 120MW Onshore Wind Farm in Poland
Project Overview
HBTP supplied 28 units of S13-2500/35 transformers for a 120MW utility-scale onshore wind farm in northern Poland. The project represents a significant deployment in the renewable energy sector, requiring transformers engineered for reliable operation under demanding conditions.
Project Background
Poland has been aggressively expanding its wind energy capacity as part of its transition away from coal-fired power. The 120MW wind farm, situated in the coastal region of Pomerania, features 48 wind turbines with a combined capacity sufficient to power approximately 80,000 households. Each turbine generates power at 690V, which must be stepped up to 35kV for collection and transmission to the onshore substation.
Customer Requirements
The project developer specified stringent requirements: voltage ratio 0.69kV/35kV, capacity 2500kVA, IEC 60076 standard, no-load loss ≤ 2.1kW (S13 efficiency), ambient temperature -30°C to +40°C, IP54 protection for coastal installation, and noise level ≤ 62dB(A) at 1m.
Our Solution
HBTP supplied its S13-series transformers, engineered specifically for renewable energy applications. The high-quality CRGO silicon steel core with step-lap mitered joints minimizes no-load losses, while copper windings provide enhanced short-circuit withstand capability and long service life.
| Parameter | Specification |
|---|---|
| Model | S13-2500/35 |
| Capacity per Unit | 2500 kVA |
| Voltage Ratio | 0.69 / 35 kV |
| Cooling | ONAN |
| Efficiency | S13 |
| Standard | IEC 60076 |
| Protection | IP54 |
| Ambient | -30°C to +40°C |
| Noise | ≤ 62 dB(A) |
Quality & Testing
Every transformer underwent comprehensive testing in HBTP's in-house laboratory: no-load loss, load loss, induced overvoltage, lightning impulse (LI 200kV), partial discharge (≤100 pC), temperature rise, and sound level tests. All test reports were reviewed and approved by the customer's third-party inspection agency.
Delivery & Installation
Production lead time was 14 weeks from order confirmation. All 28 units were transported by rail from Baoding to Gdansk port, then by road to the wind farm site. HBTP engineers provided on-site commissioning support, including oil filtration, vacuum filling, and initial energization supervision.
Project Outcomes
All 28 transformers were successfully energized and are operating at rated capacity. The project was completed on schedule, and the customer has reported excellent performance with no unplanned outages attributed to transformer equipment. HBTP's reliable power distribution solution has contributed to the project's overall success and operational efficiency.
Need a Custom Transformer Solution?
Contact our engineering team for a tailored quote based on your project specifications.
Request a Quote