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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.

Solar PV

  • Photovoltaic inverter integration: Integrated with centralized inverters or string inverters
  • Boost function: Boosts the inverter output from 0.4kV/0.69kV to 11kV/33kV for grid connection
  • Typical configuration:
  • Capacity: 1000kVA ~ 3500kVA
  • Voltage: 0.69kV/11kV or 0.4kV/33kV

Energy Storage

  • PCS (Power Supply System) Support: Connects the battery system to the power grid.
 
  • Isolation Boost: Achieves electrical isolation and voltage conversion between the low-voltage DC battery system and the medium-voltage power grid.
 
  • Features: Must withstand frequent charge-discharge cycles.

Charging Pile

  • Charging station accessories: Provides power conversion and isolation for DC fast charging stations.
  • Advantages: Compact design suitable for urban charging station space constraints.

our product

1.Oil type Compact Substation
Item Typical Specifications Product Features
Capacity 1000kVA ~ 2500kVA
  • Compact design, saves 30% space
  • High redundancy design, adapts to fluctuating loads, matches large PV inverters
  • Natural ester oil (vegetable oil) optional
  • Suitable for residential areas, low noise design
  • Digital integration, remote monitoring
  • Carbon footprint certified, CBAM compliant
  • 180°C temperature resistant, C5-M marine anti-corrosion
  • Double-layer roof ventilation, UV-resistant coating
  • Full-link certification, model validation
  • 4G remote monitoring, predictive maintenance
  • K3 fire protection rating
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.

Market Characteristics (Europe)

High entry barriers, harsh environment (high temperature/high salt spray), many off-grid applications, and mandatory SAA certification.

Market Characteristics (Australia)
Item Typical Specifications Product Features
Capacity 3000kVA ~ 5000kVA
  • Dual-split design to match PCS load characteristics
  • Epoxy resin casting, vacuum pressure impregnation (VPI) process
  • Complies with standard energy storage cabinet dimensions for easy integration
  • Suppresses PCS charging and discharging surge current, extending battery life by 20%
  • Improves three-phase imbalance, enhancing power supply reliability
  • Supports bidirectional power flow for grid-connected photovoltaic power generation and energy storage charging
  • K13/K20 rating, resistant to inverter harmonics
  • IP55 protection, resistant to high temperature, high humidity, and dust.
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

Market Characteristics (Europe)
Item Typical Specifications Product Features
Capacity 1500kVA ~ 2500kVA
  • High-capacity centralized charging, supports supercharging stations;
  • UL5085 certified, anti-harmonic design (K13/K20);
  • Buried or above-ground type, anti-theft design;
  • Aluminum alloy or galvanized steel casing, UV resistant;
  • Supports grid connection, plug and play;
  • Natural ester oil (vegetable oil) optional;
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

Market Characteristics (North America)
Item Typical Specifications Product Features
Capacity 630kVA ~ 2500kVA
  • Anti-corrosion, anti-mold
  • Steel plate welding, dust and moisture proof
  • Enhanced heat dissipation, sand-proof design
  • Anti-condensation, salt spray resistant (coastal)
  • Maintenance-free design, humid and hot climate adaptation
  • OEM/ODM support, technical training
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

Market Characteristics (Southeast Asia)
Item Typical Specifications Product Features
Capacity 3MVA ~ 25MVA
  • High-voltage side high insulation level design;
  • Natural ester oil (fire retardant);
  • PCB-free mineral oil for strong heat dissipation;
  • Reinforced heat sink, simplified dust filter design, reducing failure points for long-term outdoor use.
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

Market Characteristics (Southeast Asia)

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

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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.