Abstract:
Modern society depend on a cheap, secure and high
quality supply of electricity.
To meet these requirements of Electricity supply , power
systems are being interconnected to form grids at state, region
and national level. While operating such interconnected
systems, it is necessary to maintain a constant equilibrium
between load and generation .
If equilibrium is lost by any severe power deficit,
automatic load shedding using under frequency relays is
universally accepted as a means of ensuring rapid recovery to
equilibrium.
The objective of any good load- shedding scheme should
be to disconnect sufficient amount of load to bering the
generation deficit close to zero with minimum inconveniennce
to the consumers. After the frequency returns to its normal
value, the program will check the voltage in every area and will
bring it to normal by shedding enough load in every area
separate! ly.
The program will fully restorer the supply within one hour
of the event.
