Abstract:
The basic aim of our project is to protect the transformer against internal faults and ensuring
security of the protection scheme for external faults. System conditions that indirectly affect
transformers often receive less emphasis when transformer protection is specified. Overloading
power transformers beyond the nameplate rating can cause a rise in temperature of both
transformer oil and windings. If the winding temperature rise exceeds the transformer limits, the
insulation will deteriorate and may fail prematurely.
Prolonged thermal heating weakens the insulation over time, resulting in
accelerated transformer loss-of-life. Power system faults external to the transformer zone can
cause high levels of current flowing through the transformer. Through-fault currents create
forces within the transformer that can eventually weaken the winding integrity. A comprehensive
transformer protection scheme needs to include protection against transformer overload, throughfault,
and over excitation, as well as protection for internal faults. This paper focuses on liquidimmersed
transformers because the majority of medium and high-voltage transformers are of this
type.
If there is a fault in the transformer, by our project we can detect the fault in the
transformer and there will be notification to the control room regarding the fault.
