Power transformers are one of the most important elements in the vast network from power generation to consumption. Their performance is crucial for the safe distribution and transmission of electrical energy. They ensure the smooth transformation of voltage from one stage to another. In substations, the role of these transformers is to step up or step down the voltage for transmission or distribution.
Servostar India Pvt. Ltd. is one of the best exporters and power transformer manufacturers for various applications. In this informative blog, we are sharing our key insights on the different types of power transformers used in substations.
What Are Substations?
Before we explore the types, let’s be clear about substations. These are the junctions between different stages of the power grid from generation to the receiving end. These are systems where power is controlled, distributed and regulated as per the demand of the next stage. Substations are located near power plants, near urban and rural electrification zones, at the junction of high-voltage transmission networks and in industrial areas.
Classification of Power Transformers
Our classification is based on practical engineering by power transformer manufacturers. The key factors that differentiate these types are load handling capacity, cooling method, voltage class and capacity range.
1. ONAN Power Transformers (Oil Natural Air Natural)
There are no external fans or pumps used in cooling these transformers, as they are cooled naturally. Serving the voltage class of 33 kV to 66 kV, these are used in small transmission substations or industrial substations.
2. ONAN / ONAF Power Transformers (Dual Cooling)
Under normal working operation, these units function as ONAN transformers. When the load increases, external fans come into action and these work as ONAF (Oil Natural Air Forced). Their flexible performance under changing loads makes them suitable for grid substation and renewable energy substations with fluctuating output.
3. OFAF Power Transformers (Oil Forced Air Forced)
As the oil and air are pumped and forced respectively into them, the OFAF power transformers are used for high-load substations within the 132 kV range.
Applications Across Substations
Here are the key applications for which the power transformer manufacturers build this equipments:
● Substations Near Power Generation
● High Voltage Transmission Substations
● Receiving Transmission Substations
● Industrial Substations
● Renewable Energy Substations
Conclusion
The revolutions of renewable energy, better grid-efficient systems will always keep happening time to time, but the power transformers will remain essential for our daily electricity needs. These are mainly used within substations along with other high-energy electrical equipment. Power transformer manufacturers focus on maintaining high-quality standards and the long service life of the entire assembly of every unit. Servostar India Pvt. Ltd. provides various power transformers with customizable load capacity and multiple cooling configurations.