Power Transformer and Substation for New Energy Generation
SOLAR POWER / ENERGY POWER / CHARGING PILES
BE PART OF THE GLOBAL SHIFT TOWARDS CLEAN,
SUSTAINABLE ENERGY SOURCES.
01
Introduction
Power Transformer and Substation for New Energy Generation
“Solar-storage-charging” is an important concept in the new energy field, referring to an integrated energy system that combines PV energy, energy storage, and charging.
In this integrated system, substation transformers are key power conversion devices used to connect the different voltage levels of the PV, energy storage, charging, and power grid components.
Bidirectional Operation
- Adapting to the bidirectional energy flow characteristics of photovoltaic energy storage and charging systems, thereby improving the overall efficiency of the system;
Power Quality Management
- Solve harmonic pollution from photovoltaic/energy storage inverters and ensure the safety of power grids and electrical equipment;
Full-scene Adaptation
- To meet the deployment needs of different markets and environments around the world and reduce total lifecycle costs;
Environmental Protection and Safety
- Natural ester oil or epoxy resin insulation meets market environmental regulations and is suitable for the high safety requirements of urban charging stations.
02
Application Scenario
Scenario-based transformer technology
RENEWABLE ENERGY SOURCES OFFER NUMEROUS ADVANTAGES THAT CONTRIBUTE TO A SUSTAINABLE AND THRIVING FUTURE FOR OUR PLANET HRIVING FUTURE FOR OUR PLANET.
our product
1.Oil type Compact Substation
| Item | Typical Specifications | Product Features |
| Capacity | 1000kVA ~ 2500kVA |
|
| High Voltage | 11kV, 20kV, 22kV, 33kV | |
| Low Voltage | 0.4kV (400V), 0.69kV (690V) | |
| Transformer Type | Oil-immersed Transformer | |
| Structure Type | European-style Compact Substation / Containerized Pre-fabricated Cabin | |
| Protection Class | IP55 (Enclosure), IP65 (Transformer) | |
| Cooling Method | ONAN, ONAF | |
| Noise Level | Noise <55dB | |
| Smart System | IEC 61850 ed2.0, PRP Redundant Network | |
| Certifications/Standards | CE, TÜV, VDE, RoHS, IEC, AS60076 | |
| Application Market | PV / Energy Storage / EV Charging Station |
Limited land availability, stringent environmental regulations (SF6 restrictions), proximity to residential areas, and complex grid connection standards.
High entry barriers, harsh environment (high temperature/high salt spray), many off-grid applications, and mandatory SAA certification.
2.Dry Type Compact Substation
| Item | Typical Specifications | Product Features |
| Capacity | 3000kVA ~ 5000kVA |
|
| High Voltage | 11kV, 20kV, 22kV, 33kV | |
| Low Voltage | 0.4kV (400V), 0.69kV (690V) | |
| Transformer Type | Epoxy resin dry-type transformer | |
| Structure Type | European-style Compact Substation / Containerized Pre-fabricated Cabin | |
| Protection Class | IP55 (Enclosure), IP65 (Transformer) | |
| Cooling Method | AN/AF | |
| Noise Level | Noise <55dB | |
| Smart System | IEC 61850 ed2.0, PRP Redundant Network | |
| Certifications/Standards | CE, TÜV, VDE, RoHS, IEC, AS60076 | |
| Application Market | PV / Energy Storage / EV Charging Station |
High-temperature desert environment, weak power grid, cost sensitivity, CoC customs clearance certification, long project cycle
3.Pad Mounted Transformer
| Item | Typical Specifications | Product Features |
| Capacity | 1500kVA ~ 2500kVA |
|
| High Voltage | 13.2kV, 13.8kV, 24.9kV, 34.5kV | |
| Low Voltage | 0.4kV (480V), 0.277kV (277V) | |
| Transformer Type | Fully sealed oil-immersed transformer | |
| Structure Type | American-style transformer substation | |
| Protection Class | NEMA3R | |
| Cooling Method | ONAN, ONAF | |
| Noise Level | Noise <55dB | |
| Certifications/Standards | UL 5085,CSA C22.2, ETL, FCC, IEEE C57.12.00 | |
| Application Market | PV / Energy Storage / EV Charging Station |
UL mandatory certification, complex power grid structure (480V/277V), VPP virtual power plant mode, high installation costs
4.Oil-immersed Distribution Transformer
| Item | Typical Specifications | Product Features |
| Capacity | 630kVA ~ 2500kVA |
|
| High Voltage | 6.6kV, 11kV, 22kV, 33kV | |
| Low Voltage | 0.4kV (400V) | |
| Transformer Type | Oil-immersed Transformer | |
| Structure Type | Fully Sealed Integrated | |
| Insulation Medium | Mineral oil or Natural Ester (FR3 Vegetable Oil) | |
| Protection Class | C4/C5 Anti-corrosion, Sand-proof | |
| Cooling Method | ONAN | |
| Environmental Adaptation | Temperature -25°C ~ +55°C | |
| Certifications/Standards | TISI, SNI, ST, COA, IEC | |
| Application Market | PV / Energy Storage / EV Charging Station |
Cost-sensitive, hot and humid environment (tropical), unstable power grid, gradually improving standards, acceptance of IEC CB certification conversion
5.Oil-immersed Power Transformer
| Item | Typical Specifications | Product Features |
| Capacity | 3MVA ~ 25MVA |
|
| High Voltage | 11kV, 33kV, 66kV | |
| Low Voltage | 3.3kV, 6.6kV, 11kV | |
| Transformer Type | Oil-immersed Transformer | |
| Structure Type | With oil pillow | |
| Insulation Medium | Mineral oil or Natural Ester (FR3 Vegetable Oil) | |
| Protection Class | IP65 | |
| Cooling Method | ONAN/ONAF | |
| Intelligent System | Basic temperature control + remote monitoring (optional) | |
| Environmental Adaptation | Humidity ≤95%/day, temperature -25°C to +50°C | |
| Certifications/Standards | SASO, CoC Compliance Certification, IEC 60076 | |
| Application Market | PV / Energy Storage / EV Charging Station |
Cost-sensitive, hot and humid environment (tropical), unstable power grid, gradually improving standards, acceptance of IEC CB certification conversion
04
Articles & Blogs
Renewable energy innovations and insights.
Special technical requirements:
1. Power Quality Requirements
- Harmonic Suppression: Charging piles and PCS generate harmonics; transformers must have high impedance or matching filtering devices.
- DC Bias Tolerance: Prevent DC bias saturation caused by geomagnetic storms or inverter failures.
2. Operational Characteristics Requirements
- Frequent Start-Stop Adaptability: The photovoltaic-storage-charging system experiences large load fluctuations, requiring the transformer to withstand frequent impacts.
- Wide Load Range and High Efficiency: Maintaining high efficiency (meeting energy efficiency standards) within a 20%-100% load range.
3. Protection Configuration
- Temperature Monitoring (Dry type: PT100/fiber optic temperature measurement; Oil immersion: oil temperature + winding temperature)
- Gas Protection (Oil Immersion)
- Pressure Relief Device
GET INVOLVED
Be a Part of the Global Movement
The core trend of photovoltaic-storage-charging transformer solutions is high integration, high intelligence, high energy efficiency, and high compatibility. By optimizing transformer configuration, system costs can be significantly reduced, operating efficiency can be improved, and synergistic optimization of photovoltaic, energy storage, and charging operations can be achieved.