Load Variation

Load Variation:
What happens when load change on station ,say at particular point or instant the plant carries a steady load and energy input balances plant output of losses ,suddenly many lights are switched on the effect will be as follows:
1- This reduces over all resistance of the system and a greater current flows through the generator armature and connected circuit .
2- Reduces the turbine generated shaft speed.
Distribution of Electricity:

Demand Factor:
demand factor=Maximum demand / connected load
is the ratio of the maximum demand of a system or part of the a system to the total connected load of the system under consideration .
Diversity factor:
DF= ?((sum of the max??.individual demand?)/(Max. demand of the system))
is the ratio of the sum of the individual max demand of the various sub division of a system or part of a system to the max demand of the hole system or part of the system under consideration the partial subdivision may be one substation where there are several in a system or may be a group of residential customs .Supplied by one Transformer.


Ex(1):Given (70 Mw) power plant ( installed capacity ),Annual output=250,000,000 kw/h, having peak head=56700 kw,plant was not use for (500 hr) in one year, find the load factor ,capacity factor and use factor?

Plant location:
1- Transmission of energy.
2- Supply of fuel (transportation).
3- Supply of water.
4- Availability of land and its cost.