66kV-110kV Oil-Cooled Power Transformer for Industrial Substation & Energy Grid Solutions

Pearl Electric's 66kV-110kV Oil-Cooled Power Transformer for Industrial Substation & Energy Grid Solutions is engineered specifically for high-voltage industrial power infrastructure, delivering unmatched reliability and efficiency in demanding energy distribution networks.

With capacities ranging from 20MVA to 150MVA, this transformer is tailored to meet the rigorous demands of heavy-load industrial substations and regional grid upgrades. It supports primary voltages up to 110kV, ensuring seamless compatibility with large-scale power hubs, smart grid systems, and renewable energy integration projects. Built for extreme durability, its advanced oil-cooled design with ONAN/ONAF cooling technology optimizes thermal management, enabling stable operation even under prolonged high-load conditions.

Certified to IEC 60076 standards, the transformer features low-loss grain-oriented silicon steel cores and high-purity copper windings, reducing no-load losses by 35% compared to conventional models. Ideal for steel plants, chemical facilities, and utility-scale energy grids, it is also customizable with anti-corrosion coatings for harsh environments and dual-frequency (50/60Hz) compatibility for global deployments.

Product Parameters

Features of 66kV-110kV Oil-Cooled Power Transformer for Industrial Substation & Energy Grid Solutions

High Capacity: Scalable from 20MVA to 120MVA, meeting diverse load demands for heavy industries (e.g., steel mills, chemical plants) and utility-scale energy grids.

High Voltage Rating:  Supports 66kV to 110kV primary voltage systems, adaptable to high-voltage industrial grids and regional power networks

Oil-Immersed Design: Utilizes liquid-filled cooling (mineral oil, FR3 fluid, or silicone) for superior heat dissipation, critical for high-load and continuous operation.

superb Cooling System: Combines natural oil circulation (ONAN) with forced-air cooling (ONAF) for superior thermal management, even under sustained high loads.

High Efficiency: Three-Phase Design ensures balanced power transmission, minimizing losses and enhancing grid compatibility.

Low Losses: Grain-oriented silicon steel core with chamfered joints, reducing no-load losses by 35% compared to conventional designs, high-purity copper windings for reduced resistance, enhanced conductivity, and lower energy losses.

Customization Options: The transformers are available in a variety of capacities from 20MVA to 150MVA, voltage range from 66kV to 110kV, and can be customized to meet specific project requirements.

Advatages of 66kV-110kV Oil-Cooled Power Transformer for Industrial Substation & Energy Grid Solutions

Efficient Power Distribution: Optimized for energy storage applications, it ensures minimal energy loss during conversion, enhancing overall system efficiency. 

Durability: Corrosion-resistant tanks (epoxy-coated or stainless steel) withstand coastal, high-humidity, or chemically aggressive environments. Sealed conservator with nitrogen diaphragm prevents oil degradation and moisture ingress.

Superior Cooling: Liquid-filled cooling (mineral oil, FR3 fluid, or silicone) enables exceptional heat dissipation, critical for handling high and fluctuating loads in energy storage cycles. 

Robust Thermal Management: ONAN/ONAF cooling systems maintain stable temperatures even under sustained high loads (up to 150MVA), preventing overheating and extending lifespan.

Cost-effective: Reduced lifecycle costs due to 35% lower losses and extended maintenance intervals. By providing a long service life and reducing the frequency of repair or replacement, this transformer is a cost-effective solution for large energy projects,

Versatile applications: Supports 66kV to 110kV systems, ideal for industrial substations, utility grids, and renewable energy integration (e.g., solar/wind farms).

Environmental Adaptability：Multiple insulation fluid options (eco-friendly FR3, fire-resistant silicone, or standard mineral oil) cater to sustainability goals or hazardous environments.

Applications of 66kV-110kV Oil-Cooled Power Transformer for Industrial Substation & Energy Grid Solutions

These transformers are the backbone of reliable, efficient, and scalable power networks, bridging the gap between industrial energy demands and modern grid challenges. Their ability to perform in extreme conditions, integrate with renewables, and comply with global standards (IEC, IEEE, ISO) makes them indispensable for:

Heavy Manufacturing Facilities: Power distribution for steel mills, aluminum smelters, and chemical plants requiring high-capacity, stable voltage (66kV-110kV) to operate electric arc furnaces, heavy machinery, and continuous production lines. Handles sudden load spikes and sustained high loads with ONAN/ONAF cooling for thermal stability.

Mining & Mineral Processing: Reliable power supply for remote mining operations, crushers, and conveyor systems in harsh environments. Corrosion-resistant tanks and anti-vibration mounts ensure durability in dusty, humid, or corrosive conditions.

Oil & Gas Refineries: Voltage regulation for offshore platforms, pipelines, and refinery complexes. Flame-retardant oil and explosion-proof designs meet stringent safety standards (e.g., ATEX).

Regional Power Transmission Networks: Step-up/down transformers for 110kV transmission lines, connecting power plants to substations across vast geographical areas.

Smart Grid Upgrades: Integration with IoT-enabled monitoring systems for real-time load balancing, fault detection, and predictive maintenance. Modular design supports phased upgrades to smart grid infrastructure.

Urban Grid Reinforcement: Power distribution for megacity grids, metro rail systems, and high-rise commercial complexes. Compact footprint and low-noise operation suit densely populated areas.

Large-Scale Solar/Wind Farms: Grid interconnection for solar parks (>100MW) and offshore wind farms, stepping up generated power to 66kV-110kV for long-distance transmission. Handles intermittent renewable output with rapid load adaptability and low-loss design.

Energy Storage Systems (ESS): Voltage conversion for grid-scale battery storage (e.g., 20MVA+ projects), ensuring seamless energy flow during charge/discharge cycles. Dual-frequency compatibility (50/60Hz) supports global ESS deployments.

Hydroelectric Plants: Step-up transformers for hydropower stations, transmitting energy from remote dams to urban grids. Moisture-resistant insulation and sealed tanks prevent degradation in humid environments.

Railway Electrification: Power supply for high-speed rail networks and electric locomotive substations. Robust overload tolerance ensures uninterrupted operation during peak travel periods.

Data Centers: Backup power distribution for hyperscale data centers requiring 110kV primary supply and ultra-reliable redundancy.

Island/Microgrid Systems: Core component of off-grid or hybrid microgrids in remote islands or military bases. ompatible with diesel generators, solar arrays, and battery storage for hybrid energy solutions.

FAQs of 66kV-110kV Oil-Cooled Power Transformer for Industrial Substation & Energy Grid Solutions

1.  How does this oil-cooled power transformer handle overloads?

Robust design tolerates short-term overloads (up to 150% capacity) without performance degradation.

2. What cooling systems are used?

ONAN/ONAF Cooling: Combines natural oil circulation (ONAN) with forced-air cooling (ONAF) for superior thermal stability under high loads.

3. Can this oil-cooled power transformer integrate with renewable energy systems?

Yes. Ideal for solar/wind farms and grid-scale energy storage, with rapid load adaptability and dual-frequency (50Hz/60Hz) compatibility.

4. What maintenance is this oil-cooled power transformer required?

Minimal upkeep: Annual oil testing, periodic cooling system checks, and corrosion inspections in harsh environments.

5.  What testing ensures reliability?

Pre-delivery tests: Lightning impulse, temperature rise, short-circuit, and partial discharge tests per IEC standards.