What is are High Voltage Transformer?

What is are  High Voltage Transformer?

High Voltage Transformer Definition

A high voltage transformer is defined as a device that changes high-voltage AC power to low-voltage AC power or vice versa, functioning above 35 kV.

Core Applications

High voltage transformers are crucial for testing electrical components, efficient power distribution, and enhancing voltage stability through FACTS systems.

Essential Features

These transformers are characterized by their ability to handle high voltages and currents, requiring robust insulation and cooling systems.

Testing Standards

High voltage transformers undergo rigorous testing to meet IEEE standards, ensuring their reliability and safety in various electrical applications.

Transformer Types

Testing Transformers

Testing transformers are used to generate high voltages for testing the insulation strength and performance of electrical equipment and components, such as cables, insulators, switchgear, motors, etc.

Cascaded Testing Transformers Advantages

• The higher output voltage can be achieved with smaller and cheaper units

• Lower insulation stress on each unit due to lower individual voltages

• Higher efficiency and lower losses due to lower currents 

Cascaded Testing Transformers Disadvantages

• More complex wiring and synchronization of the primary sources

• Higher risk of partial discharge and corona due to higher total voltage

• Higher capacitance and inductance of the secondary circuit due to longer wires

Power Transformers

Power transformers are used to step up or step down the voltage level for power transmission and distribution.

Power Transformers Advantages 

They reduce power losses, improve voltage regulation, and increase system stability and reliability.

HVDC Transformers 

HVDC transformers convert AC power to DC power for use in high-voltage direct current systems, essential for long-distance power transmission and connecting different power grids.

HVDC Transformers Advantages

They can withstand high DC voltages and currents, harmonics, polarity reversals and transient overvoltages.

FACTS Transformers

FACTS transformers manage reactive power and maintain voltage stability in AC power systems, enhancing performance with advanced power electronics.

FACTS Transformers Advantages

They must also provide precise voltage regulation and fast response.

Special Transformers Advantages

Special transformers cater to unique applications that demand specific features

Special Transformers Type

• Impulse transformers

• High-frequency transformers

• Instrument transformers

• Isolation transformers

• Auto-transformers

• Arc-furnace transformers

• Traction transformers