Table of Contents
Can transformer generate reactive power?
The reactive power drawn by power transformer could be as high as 5\% of the transformer rating when supplying full load current. Power factor at the primary of the transformer is usually lower than what is measured at the secondary due to this reactive power requirement of transformer.
How is power transferred in a transformer?
A transformer is an electrical device that transfers energy from one circuit to another by magnetic coupling with no moving parts. A changing current in one winding creates a time-varying magnetic flux in the core, which induces a voltage in the other windings.
What is reactive power in transmission line?
Reactive power is used to provide the voltage levels necessary for active power to do useful work. Reactive power is essential to move active power through the transmission and distribution system to the customer.
Why do we need reactive power in a transmission system?
It is consuming reactive power, hence to compensate it we have to supply reactive power. In other words, we can say, to maintain flat voltage profile (i.e. to maintain voltage 1 pu everywhere), in a transmission system, proper reactive power control is necessary.
What is the reactive power of a power transformer?
This is due to the reactive power requirement of two separate branches of the transformer namely: The reactive power drawn by power transformer could be as high as 5\% of the transformer rating when supplying full load current.
What is the power factor at the primary of transformer?
Power factor at the primary of the transformer is usually lower than what is measured at the secondary due to this reactive power requirement of transformer. If the metering is done at medium voltage then the additional reactive power consumed by the transformer will also be measured.
How are voltages maintained in a transmission system?
Synchronous generators, SVC and various types of other DER (Distributed energy resource) equipment are used to maintain voltages throughout the transmission system. Injecting reactive power into the system raises voltages, and absorbing reactive power lowers voltages. .