Advanced 35kV Oil-Immersed OLTC Power Transformer from China Suppliers and Factory for Stable Grid Performance
Product Parameter
| Parameter | Specification |
|---|---|
| Rated Capacity | 3150kVA – 31500kVA |
| High Voltage | 33kV |
| Low Voltage | 6.3kV / 6.6kV / 10.5kV / 11kV |
| Frequency | 50Hz |
| Tap Range | ±5% or ±2×2.5% |
| Connection Group | Yd11 / YNd11 |
| Cooling Method | ONAN / ONAF (optional) |
| Insulation Class | Class F / Class H |
| No-Load Loss | 2600W – 17400W |
| Load Loss (75℃) | 23500W – 110200W |
| Impedance Voltage | 7% – 10% |
| Regulation Method | On-load Tap Changer (OLTC) |
| Insulation Level | LI 75kV / AC 35kV |
Product Applications
Urban Utility Grid and Substation Systems
The 35kV OLTC transformer is widely used in urban substations and regional power distribution networks where stable voltage control is essential. It enables continuous voltage adjustment under load, maintaining output stability within ±5% tolerance. With capacities up to 31,500kVA, it supports high-demand urban infrastructure and ensures uninterrupted electricity supply for residential and commercial users.
Heavy Industrial Power Demand Systems
In industries such as metallurgy, petrochemical processing, mining, and large-scale manufacturing, voltage fluctuations can significantly affect production efficiency. This transformer supports real-time voltage regulation and handles load variations up to 110%–120% of rated capacity, ensuring stable operation of heavy machinery and reducing production downtime in critical industrial environments.
Renewable Energy and Smart Grid Integration
The transformer is ideal for solar farms, wind power stations, and hybrid energy systems requiring dynamic grid interaction. Its OLTC functionality ensures smooth voltage adaptation during fluctuating renewable output conditions. It supports efficient grid synchronization with power ratings up to 31.5MVA, improving energy stability and reducing curtailment losses in renewable integration projects.
Product Advantages
Efficient Energy Performance
Optimized transformer design helps reduce energy consumption and improve long-term operating efficiency.
Reliable Finished Structure
Compact and durable finished structure ensures stable operation in industrial environments.
Sealed Tank Protection
Fully sealed design minimizes external contamination and extends equipment service life.
Stable Insulation Performance
Advanced processing technology improves insulation reliability and operational safety.
Reinforced Mechanical Design
Strong structural assembly enhances transportation safety and operational stability.
Flexible Capacity Options
Available in multiple capacity configurations for different distribution requirements.
Key Benefits
The 35kV oil-immersed OLTC power transformer is a high-performance solution for medium-voltage distribution systems requiring continuous voltage regulation and reliable energy transmission. Its combination of on-load tap changing technology, large capacity range, and high efficiency makes it suitable for utility networks, industrial facilities, and renewable energy projects.
With excellent stability, strong overload capacity, and long service life, it ensures consistent power quality and supports the evolving demands of modern electrical infrastructure.
FAQ
What is the main advantage of OLTC in a 35kV transformer?
OLTC allows voltage adjustment while the transformer is operating, ensuring uninterrupted power supply and stable voltage output under changing load conditions.
Can this transformer operate in renewable energy plants?
Yes, it is widely used in wind and solar power systems where voltage fluctuations are frequent and real-time regulation is required.
What is the typical overload capability of this transformer?
It can typically handle short-term overloads up to 110%–120% of rated capacity, depending on operating conditions.
Is this transformer suitable for smart grid applications?
Yes, it is fully compatible with modern smart grid systems due to its automatic voltage regulation and stable performance characteristics.
What cooling systems are available?
It supports ONAN (Oil Natural Air Natural) as standard, with optional ONAF (Oil Natural Air Forced) for higher load conditions.
What is the rated capacity range of the 35kV OLTC transformer?
The rated capacity ranges from 3150kVA up to 31500kVA, allowing flexible configurations for different industrial and utility distribution requirements.