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Como equipo clave en el sistema de energía, el transformador de potencia de 220 kV asume la pesada tarea de la conversión de voltaje y la transmisión de energía. Tiene una estructura compacta y está compuesto por núcleo de hierro, devanado, tanque de aceite, manguito aislante y otros componentes. Es ampliamente utilizado en redes eléctricas, fotovoltaica, energía eólica, almacenamiento de energía, producción de hidrógeno, fábricas y otros sectores energéticos.
| Parameter | Unit | Value |
| Product Model | – | SFFZ20-300000/220 |
| Rated Capacity | kVA | 300,000 (165/165 MVA split) |
| Rated Voltage Ratio | kV | 230±8×1.25%/37-37 |
| Short-Circuit Impedance | % | U12=14, U13=14, U23≥24 (based on 165 MVA) |
| Rated Frequency | Hz | 50 |
| Vector Group | – | YNd11-d11 |
| Insulation Level | kV | HV: LI950/AC395; LV: LI200/AC85 |
| Cooling Method | – | ONAF |
| No-Load Loss | kW | ≤118 |
| Load Loss | kW | ≤788 (at 75°C) |
| Temperature Rise Limit | K | Top oil: 55; Winding average: 65; Winding hot-spot: 78 |
| Noise (Sound Pressure Level) | dB(A) | ≤65 |
The split-winding design provides two independent 37kV secondary outputs, allowing the transformer to supply separate collector bus sections or load groups. This configuration is well suited to large photovoltaic, wind power, energy storage and industrial power projects.
With a total rated capacity of 300MVA, the 220kV power transformer can support large power-generation and high-load applications while maintaining stable voltage conversion between the 220kV grid and downstream 37kV systems.
The 230±8×1.25% voltage-regulation range allows the transformer to adapt to grid-voltage fluctuations and changing load conditions, helping maintain a stable secondary-side voltage.
The ONAF cooling system combines natural oil circulation with forced-air cooling to improve heat dissipation under high-load operation. Controlled oil and winding temperature rise supports reliable continuous service.
The specified impedance between the high-voltage and two low-voltage windings helps limit fault current and supports coordination with downstream protection systems. The final impedance can be evaluated according to the project’s short-circuit study and bus arrangement.
Controlled no-load and load losses help reduce long-term electricity waste. For transformers operating continuously, lower losses can contribute to a more favorable lifecycle operating cost.
The dual-secondary configuration enables one transformer to connect two medium-voltage collector systems, helping simplify the electrical layout of large solar farms, wind farms, energy-storage stations and hydrogen-production facilities.
Capacity, voltage ratio, impedance, cooling configuration, insulation level, monitoring devices and operating-environment requirements can be adjusted according to the customer’s technical specification and single-line diagram.
A 220kV high voltage transformer is generally suitable for projects where the incoming or outgoing transmission voltage is 220kV. Typical applications include:
Before selecting a 220kV transformer, buyers should confirm the system voltage, transformer capacity, load characteristics, short-circuit level and connection scheme. For renewable energy projects, the transformer must also match the collection system, grid-connection voltage and expected power-output variation.
Liye can customize the Transformador de potencia de 220 kV according to the customer’s grid voltage, secondary circuits, capacity distribution, impedance requirements and operating environment.
Customers searching for a 220kV transformer for sale can submit a technical specification, tender document or single-line diagram. Liye will review the system configuration and provide a corresponding technical proposal and quotation.
