Answer / asaf

removal of load from supply over certain periods when demand
become greater than supply.load shdding is also known as
rolling blackout. load shedding are in response to
insufficient resources inability to meet demand for suuply.

Answer / pallisseri narayanan

During any fault in an electrical system, voltage and
frequency will reduce and the generating station will try
to recover through Auotmatic Voltage regulation system and
Speed Governor control. The system disturbance depends upon
the magnitude of fault, area where the fault is occured and
the time taken to trip through protection relays. In the
meantime if we can throw out some non critical loads the
recovery and system normalisation will be fast and the
remaining loads will be on safe. Hence we provide load
shedding arrangement through a frequency relay with
different stages of frequency setting. Non critical loads
will connect to the first stage ( for example if the normal
frequency is 50 HZ the first stage setting can be 49.8HZ,
2nd stage 49.5, third stage 49.2 etc;) then the next
prioriy of loads to 2nd stage and the next to 3rd stage.
The settings are done as per the electrical system study.

Answer / indrajeet

In parallel operation the process of removing non cricital
loads during undesirable eventsis called load shadding.

Answer / sarad bashyal

demand of power = supply of power -no load sheeding
if supply of the power is higher than demand then at this
time generated power should be decrease in power station by
checking the frequency.
if demand of the power is greater than supply of the power
then there must be cut some feeders in order to balance
the electric system. cutting some load feeders to balance
the electric system is callted load shedding. if we do not
balance the system then anytime frequency will decrease or
increase in the system and finally system will collapsed
and some where it is also called blackout. when system
collapsed/black out that time all the power station which
are connected in grid are are stooped.

Hello, I am just preparing my self for a university interview and struck on the 11kv ring main unit system network. I just know that ring main unit has total three breakers, fuses and use to supply a power to any load/ building without any interrupt. But i am not be able to visualize the connections, either Ring main unit getting power from two different power sources? or there is always one feeder in complete ring circuit??? I would be highly thanks full of you help me.

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