Abstract:
Power Transformer is an electrical device which transfers energy between two
circuits through Electromagnetic Induction. Power transformers are the most
important and expensive equipment in any power supply system. Keeping in view
its high cost, the basic need in any power supply system is the protection of power
transformer from any sort of damages or malfunctioning. A transformer may be
used as a safe and efficient voltage converter to change the AC voltage at its input
to a higher or lower voltage at its output. A power transformer is a very expensive
electrical device. Due to its high cost, there has always been a debate for the
protection of Power Transformer among Electrical Researchers. This project is
actually a demo/prototype of protection of power transformer. This project has
proposed a method of protection for power transformer from different faults. The
various faults occurring in the transformer and the steps taken to protect the
device from these faults are also discussed. The electrical parameters like current,
voltage and temperature of the transformer are monitored. These parameters are
fed as base values to micro-controller. The output signal is provided to operate a
relay by comparing the base values with the operating electrical parameters. As
soon as voltage and currents will exceed maximum ratings, relays will operate and
turn off the transformer to avoid any sort of damage. The thing which
distinguishes this scheme from other protection schemes is the use of PIC microcontroller
and LCD display in it, which is a perfect example of an efficient
monitoring and protection scheme for a Power Transformer.
