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Pearl Electric's 20MVA Liquid-Filled Oil-Immersed Power Transformer for Energy Storage is engineered specifically for modern energy storage systems, delivering efficient energy conversion and robust performance in renewable energy applications, including solar and grid-scale storage projects.
With a capacity of 20MVA, this transformer is tailored to meet medium to large-scale energy storage demands. It supports primary voltages of 66kV, ensuring compatibility with large energy storage facilities. Built for durability, its oil-immersed cooling design enhances thermal management, enabling reliable operation under high-load conditions.
| Parameter | Value |
|---|---|
| Primary Voltage | 66KV or Customization |
| Capacity | 20MVA or Customization |
| Taps | +4/-12*2.5% (On-load tap changer) |
| Frequency | 50Hz |
| Phases | Three-Phase |
| Vector Group | YNd11 |
| Cooling | ONAN |
| Insulation Class | A-Class |
| Temperature Rise | 60/65K |
| Insulation Material | Mineral oil/FR3 Oil |
| Winding Material | Copper/Aluminium |
| Standards | IEC60076 or Local standard |
Features of 20MVA Liquid Filled Oil-immersed Power Transformer for Energy Storage Systems
High Capacity: Optimized for medium to large-scale energy storage systems, supporting high-power energy conversion and grid integration.
High Voltage Rating: The transformers are rated for 66kV high voltage applications to ensure safe energy distribution in high-power energy conversion and grid integration.
Oil-Immersed Design: Utilizes liquid-filled cooling (mineral oil, FR3 fluid, or silicone) for superior heat dissipation, critical for high-load and continuous operation.
ONAN Cooling System: Oil Natural Air Natural (ONAN) technology ensures efficient temperature control, even under prolonged high-energy demands.
High Efficiency: Three-Phase Design ensures balanced power transmission, minimizing losses and enhancing grid compatibility.
Low Losses: Optimized core and winding materials reduce no-load and load losses, improving overall system efficiency.
Customization Options: The transformers are available in a variety of capacities from 10MVA to 100MVA and can be customized to meet specific project requirements.
Advatages of 20MVA Liquid Filled Oil-immersed Power Transformer for Energy Storage Systems
Efficient Power Distribution: Optimized for energy storage applications, it ensures minimal energy loss during conversion, enhancing overall system efficiency.
Reliability：Robust oil-immersed design and Class A insulation provide long-term reliability, even in extreme temperatures or harsh environments.
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.
Cost-effective: 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: Its rugged design supports voltage regulation and frequency control，enabling seamless integration of intermittent renewable sources like solar and wind.
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 20MVA Liquid Filled Oil-immersed Power Transformer for Energy Storage Systems
The 20MVA oil-immersed transformer is a versatile and robust component designed to address the unique demands of modern energy storage infrastructure. Below are its key applications:
Renewable Energy Hybrid Systems：
Solar + Storage Plants: Connects solar farms with energy storage systems to smooth intermittent power generation, ensuring stable grid feed-in during low sunlight.
Wind + Storage Hybrids: Balances wind power variability by storing excess energy and releasing it during low-wind periods.
Grid Stabilization & Peak Shaving：
Peak Load Management: Reduces grid strain during high-demand periods by discharging stored energy through the transformer.
Voltage Support: Maintains grid voltage stability in regions with high renewable penetration or weak grid infrastructure.
Industrial Energy Storage：
Demand Charge Reduction: Helps factories and large facilities lower energy costs by storing off-peak power and discharging it during peak hours.
High-Power Process Support: Delivers stable power for energy-intensive industrial operations, such as mining or manufacturing.
Utility-Scale Energy Storage Projects：
Bulk Energy Storage: Supports multi-megawatt storage installations designed for long-duration energy backup.
Renewable Curtailment Mitigation: Stores excess renewable energy that would otherwise be wasted due to grid congestion.
Electric Vehicle (EV) Charging Hubs：Manages high-power demands from EV charging networks paired with on-site storage to avoid grid overload.
FAQs of 20MVA Liquid Filled Oil-immersed Power Transformer for Energy Storage Systems
1. What are the key features of a 20MVA oil-immersed transformer for energy storage?
Energy Efficiency: Modern designs use three-dimensional wound cores to minimize three-phase imbalance and reduce no-load losses, enhancing energy-saving performance.
Thermal Stability: Advanced oil circulation and cooling systems ensure uniform temperature distribution in windings and oil, critical for high-load energy storage applications .
2. Can these transformers be customized for specific ESS requirements?
Yes. Pearl Electric as manufacturer offers OEM/ODM services to tailor parameters like cooling methods (ONAN/ONAF), voltage ratios, and enclosure types.
3. How does thermal management work in these transformers?
Fluid-Solid Coupling: Computational methods like Finite Volume Method (FVM) simulate temperature distribution in core and windings, enabling optimized fan control strategies to prevent overheating.
Oil Flow Design: Structured oil channels control flow rates to avoid oil-flow electrification and localized overheating, critical for longevity.
4. What are the key applications of 20MVA oil-immersed transformers in energy storage systems?
These transformers are critical for stepping up or down voltage levels in large-scale energy storage systems (ESS), such as grid-connected battery storage or renewable energy integration. Their high capacity (20MVA) ensures efficient power transfer between storage systems and the grid, minimizing energy loss during conversion.
5. What maintenance practices are recommended?
Leak Prevention: Sealed tanks with flap welding and high-vacuum oiling minimize leaks and contamination risks.
Predictive Monitoring: Techniques like partial discharge (PD) measurement and oil quality analysis help detect early faults, aligning with ANSI/IEEE guidelines.
