double winding transformer
1.On-load voltage regulation: Voltage regulation without power outage, stable voltage, suitable for scenarios with large load fluctuations.
2.Forced oil circulation air cooling: Strong heat dissipation, high overload capacity, ideal for large-capacity main transformers.
3.Double-winding structure: For 110kV/220kV main transformers, reliable operation and easy maintenance.
4.Excellent short-circuit withstand capability: Low partial discharge, good insulation, long service life.
5.Suitable for substations, industrial and mining step-down stations, new energy power stations and large industrial parks.
1. Product Introduction
Three-phase, double-winding, oil-immersed power transformer with forced oil circulation and on-load voltage regulation. It is highly energy-efficient, has a long lifespan and is durable.
Its core function is to realize efficient power transmission and flexible voltage regulation at high voltage levels. It is suitable for 110kV, 220kV and other main power transmission and distribution scenarios, featuring large capacity, high stability and low loss. It serves as key equipment for regional power grids, large industrial hubs and new energy grid connection.
2. Technical Parameters（customizable）
| Item | Core Parameters (Typical Range) | Description |
Rated Capacity | 20000KVA-300000KVA | Determines power transmission capacity, customizable |
Connection Group | YNd11 | Suppresses 3rd harmonics, suitable for three-phase four-wire system |
No-load Loss | Low-loss design (≤15% below national standard limit) | High-quality silicon steel core, energy saving |
Load Loss | Low-loss copper winding design | Reduces long-term operating energy consumption |
Cooling Mode | OFAF/ONAF (Forced Oil Air Forced / Oil Natural Air Forced) | High-efficiency heat dissipation for large-capacity transformers |
Sealed Structure | Capsule sealing / metal corrugated expansion type | Isolates air and moisture, extends oil service life |
3. Main Features
High Efficiency & Energy Saving
Adopts cold-rolled oriented low-loss silicon steel sheet (thickness ≤0.3mm) with full-step lap joint structure. Greatly reducing electricity cost in long-term operation.
Strong Short-circuit Withstand Capability
Windings adopt tight binding and directed cooling structure. Clamps and iron core are integrally reinforced to effectively resist short-circuit electromagnetic force and improve operation reliability.
Flexible Voltage Regulation
Equipped with on-load tap changer, allowing stepless voltage regulation under load. It adapts to load fluctuations and ensures stable output voltage (regulation range ±5%).
Sealed & Maintenance-free
Adopts sealed oil tank to isolate transformer oil from air, delay oil aging, reduce maintenance workload and extend service life.
High Insulation & Safety
High-voltage windings adopt continuous interleaved or internal shield structure with reinforced sections to improve impulse voltage distribution.
Strong Adaptability
Multiple voltage combinations and three-winding versions are available for customization, compatible with various power grid structures and industrial scenarios.
4. Application Scenarios
Regional Transmission Grids: Used as core equipment in 110kV/220kV key substations for regional power transmission and voltage conversion.
Large Industrial Hubs: Applied in steel, petrochemical, data centers and other heavy-load industrial bases.
Urban Grid Upgrading: Suitable for urban central substations and new district distribution projects with low noise.
New Energy Grid Connection: Used in wind and photovoltaic power station booster stations for efficient grid integration.
Industrial & Mining Enterprises: Provides dedicated power supply for mines, chemical industry and remote factories to ensure continuous production and safety.
