Module 3: Variable Loads of a Power Plant Flashcards
IDENTIFICATION
The load on a power station varies from time to
time due to uncertain demands of the consumers and is known as ______.
variable loads on the power station.
The curve showing the variation of load on the power station with respect to (w.r.t) time is known as a ______.
load curve
shows the variations of load w.r.t. time during the day.
daily load curve
Can be obtained
from the daily load curves of that month. Generally used to
fix the rates of energy.
monthly load curve
Is obtained by considering the monthly load curves of that particular year. Generally used to determine the annual load factor.
yearly load curve
It is the sum of continuous ratings of all the equipments connected to supply system.
Connected Load
The sum of the continuous ratings of all the equipments in the consumer’s premises is the “_________” of the consumer.
connected load
It is the greatest demand of load on the power station during a given period.
maximum demand
The load on the power station varies from time to time. The maximum of all the demands that have occurred during a given period (say a day) is the _______.
maximum demand
It is the ratio of maximum demand on the power station to its connected load.
Demand Factor
The knowledge of _______ is vital in determining the capacity of the plant equipment.
demand factor
The average of loads occurring on the power station in a given period (day or month or year).
Average load
The ratio of average load to the maximum demand during a given period is known as load factor.
Load Factor
The ratio of the sum of individual maximum demands to the maximum demand on power station.
Diversity Factor
It is the ratio of actual energy produced to the maximum possible energy that could have been produced during a given period.
Plant Capacity Factor
is an indication of the reserve capacity of the plant.
Plant Capacity Factor
It is that reserve generating capacity which is not in operation but can be made available for service.
Cold Reserve
It is that reserve generating capacity which is in operation but not in service.
Hot Reserve
It is that reserve generating capacity which is connected to
the bus and is ready to take the load.
Spinning Reserve
It is ratio of kWh generated to the product of plant capacity and the number of hours for which the plant was in operation.
Plant Use Factor
When the load elements of a load curve are arranged in the order of descending magnitudes, the curve thus obtained is called a ______.
load duration curve
A device which taps electrical energy from the electric power system is called a ____ on the system.
load
consists of lights, fans, refrigerators, heaters, television, small motors for pumping water etc.
Domestic load
consists of lighting for shops, fans and electric appliances used in restaurants etc.
Commercial load
consists of load demand by industries.
Industrial load
consists of street lighting, power required for water supply and drainage purposes.
Municipal load
This type of load is the electric power needed for pumps driven by motors to supply water to fields. Generally this type of load is supplied for 12 hours during night.
Irrigation load
This type of load includes tram cars, trolley buses, railways etc.
Traction load
Start-up time of Spinning Reserve?
1-2 hrs
Start-up time of Hot Reserve?
1-2 hrs
Start-up time of Cold Reserve
2 hrs - 24 hrs
