Grid-Sync Split Transformer Short-Circuit Current Challenges Redefining Power Distribution Efficiency Transformer

Solar Storage Split Winding Dry Type Transformer Cost-Effective Grid Protection Double Reliability Power Transformer

Qinghao dry type distribution transformer includes cast resin insulation, amorphous alloy and on-load tap changer type, which provides general security for environment with its non-flammable, self-extinguished, toxic gas-free structure and low noise level.

Split-winding transformer is a newly type transformer with a multi-winding power transformer consisting of one high-voltage winding and two or more low-voltage windings with the same voltage and capacity in each phase. The normal power transmission of the split transformer is only carried out between the high-voltage and low-voltage windings, and it has the function of limiting the short-circuit current in the event of a fault. Mainly used in fields such as photovoltaic power generation system, energy storage system, and industrial power distribution.

Flame retardant, low temperature rise, maintenance free, long-term full load operation and eco-friendly.

Main Characteristics:
1. Dual Impedance Protection Architecture.
2. Redundant Power Delivery.
3. Modular Scalability: Split Winding Quantity: 2/3/4 configurable per phase (custom designs available)
4. Enhanced System Reliability:
   1) MTBF (Mean Time Between Failures): >30,000 hours (double conventional transformers)
   2) Fault Recovery: Auto-load transfer within 8 seconds (IEC 61850 compatibility)
5. Energy Efficiency Leadership:
1) Full-Load Efficiency: ≥98.5% (ISO 9001/14001 certified manufacturing)
2) Loss Reduction:
   Core losses: 60-80% lower (non-crystalline alloy option)
   Copper losses: Optimized by 35% via split winding design
6. Compact Industrial Design:
  1) Space Saving: 40% smaller footprint vs. conventional solutions (typical 10MW PV plant)
  2) Weight Reduction: 25-30% lighter core materials (advanced laminations)

Advantages:
1. Safe flame retardant, fireproof, explosion-proof, pollution-free, can be directly installed in the load center.
2. Low loss, maintenance-free, low comprehensive operating cost, obvious energy-saving effect.
3. Good moisture-proof performance, low noise, strong heat dissipation ability.
4. Strong load capacity, low product temperature rise, strong heat dissipation capacity, 140% load when forced air cooling to meet temporary emergency needs.
5. Foil coils are insulated with DMD prepreg cloth to improve short-circuit resistance and service life.
6. Limit short-circuit current: When a low-voltage branch short-circuits, the current must flow through the high-impedance path, thereby significantly reducing the short-circuit current amplitude and protecting the system equipment.
7. Improve system reliability: When a low-voltage winding fails, the voltage fluctuation of the other branch is minimal, which can maintain normal power supply and improve system reliability.
8. Cost-effectiveness: The two low-voltage branches can be connected to different loads or inverters respectively, supporting independent operation or parallel expansion to meet the needs of multiple scenarios.

Applications
Mainly used for Solar Farms, Energy Storage, Industrial Grids.

Why Split-Winding?

• For Engineers: Eliminates costly harmonic filters in renewable systems
• For Plant Managers: Reduces unplanned downtime by 90% (case studies)
• For Project Owners: Achieves 15-20% LCOE reduction in solar/storage projects

Service environment:
1. Ambient temperature: Maximum +45ºC, Minimum -30ºC
2. Altitude: less than 1000 meters.
3. Max. air relative humidity 100% (±25ºC).
4. Max. Ground ramp degree 3°.
5. The earthquake: the horizontal acceleration≤0.3m/s² ,the vertical acceleration≤0.15m/s².
6. The installation site shall be free from explosion danger, fire, filthy material, chemical corrosion and violent vibration.
(Note: If the application environment is different from the above standard conditions, please contact for customized designs.)

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