40MVA 132kV/11kV Step-up Power Transformer for Solar/Wind Farm Renewable Energy

As renewable energy integration continues to expand, grid systems require greater resilience to handle fluctuating power output and dynamic load conditions. Pearl Electric's 40MVA 132kV/11kV Double-Winding Oil-Immersed Step-up Power Transformer is specifically designed for utility-scale solar PV plants and wind farms, efficiently stepping up generated power for reliable grid connection. Featuring a low-loss core, optimized winding design, robust cooling performance, and strong short-circuit withstand capability, it ensures high efficiency, grid stability, and long-term operational reliability. Serving as both a critical link between renewable energy generation and the transmission network and a safeguard for secure power delivery, this transformer provides a dependable solution for modern renewable energy infrastructure.

Product Parameters

Features of 40MVA 132kV/11kV Step-up Power Transformer

• Optimized for Variable Loads : Engineered with high-permeability, low-loss Cold-Rolled Grain-Oriented (CRGO) silicon steel sheets (Step-lap miter joint design), minimizing both no-load losses and operational noise level (<65dB).

• Robust Cooling System : Equipped with advanced ONAN (Oil Natural Air Natural) and ONAF (Oil Natural Air Forced) cooling modes to handle ambient temperature extremes in remote solar/wind regions.

• High Insulation Integrity : Utilizes premium insulation materials (such as DuPont® Nomex® paper) with a Basic Insulation Level (BIL) of LI 650 kV / AC 275 kV on the high-voltage side, ensuring long-term dielectric stability.

• Smart Grid Integration : Fully compatible with IEC 61850 communication protocol. Supports optional smart sensors for Online Dissolved Gas Analysis (DGA), fiber-optic winding temperature tracking, and Partial Discharge (PD) monitoring.

• Severe Environment Protection : Covered with C5-M (Very High Marine/Industrial) anti-corrosion coating standard according to ISO 12944, preventing rust from salt spray, sandstorms, and high UV.

Advantages of 40MVA 132kV/11kV Step-up Power Transformer

• Exceptional ROI via Low-Loss Design : Solar and wind farms do not generate electricity 24/7. Our transformer features ultra-low no-load loss, significantly reducing the "reverse power absorption" cost from the grid during non-generation hours (e.g., at night for solar), boosting overall project ROI.

• Superior Harmonic & Short-Circuit Withstand : Renewable inverters introduce harmonic currents that stress insulation. Our transformer utilizes high-mechanical-strength copper windings under hydraulic pre-pressing, preventing dynamic deformation caused by severe grid short-circuits or harmonic resonance.

• Eco-Friendly Ester Fluid Option : For sensitive ecosystems, we offer biodegradable synthetic or natural ester fluids. This reduces environmental liability in case of leaks and upgrades the fire safety rating near high-value wind/solar assets.

• Extended Service Life : Through thermal aging suppression and rigorous Factory Acceptance Testing (FAT), including full-sequence lightning impulse tests, we guarantee low maintenance overhead and hassle-free operation over a three-decade lifecycle.

Application of 40MVA 132kV/11kV Step-up Power Transformer

• Utility-Scale Solar PV Hubs : Serves as the main step-up unit to collect 11kV medium-voltage electricity from multiple solar inverter stations and elevate it to 132kV for long-distance regional transmission.

• Onshore/Offshore Wind Power Interconnection : Custom-tailored to withstand the sudden ramp-up/ramp-down energy surges inherent in wind turbine clusters, maintaining terminal voltage stability.

• Battery Energy Storage Systems (BESS) Integration: Perfectly optimized for bi-directional power flow requirements during intense charge and discharge cycles in multi-megawatt grid-scale storage facilities.

FAQ

Q1: Does this 40MVA transformer comply with international grid compliance standards?

• A: Yes. Our 40MVA 132kV transformers are fully designed, manufactured, and tested in strict accordance with IEC 60076 standards (Europe/International) and IEEE C57.12.00 (Americas). We provide comprehensive type test reports from accredited third-party laboratories.

Q2: How do you choose between OLTC (On-Load Tap Changer) and NLTC (No-Load Tap Changer) for renewable farms?

• A: For solar and wind farms, we strongly recommend an OLTC ( ±8X1.25% or ±10X1.25%). Because renewable output fluctuates violently, an OLTC allows the transformer to adjust the voltage ratio automatically under load, keeping the grid connection voltage stable without disrupting power generation.

Q3: Can this transformer operate reliably in desert environments with high ambient temperatures?

• A: Absolutely. For desert PV applications, we enhance the cooling design to ONAF with an upgraded top-oil temperature rise limit . The tank is also equipped with IP55/IP65 terminal boxes to prevent sand and dust ingress.

Q4: What is the standard lead time and shipping method for a 40MVA 132kV transformer?

• A: The typical production and testing lead time is 16 to 20 weeks from drawing approval. Due to its size and weight, the transformer main body is shipped without oil (filled with dry nitrogen) via heavy-lift breakbulk vessels or specialized flat-rack containers, with radiators and oil shipped separately.