WHY THE FREQUENCY IS 50 HZ IN INDIA.CAN WE USE SOME OTHER
FREQUENCY.IF SO WHAT IS THE RANGE AND WHAT WILL BE THE
EFFECT IN PRESENT POWER SYSTEM IF WE CHANGE THE FREQUENCY
AS YOU SUGGEST ?
Answer Posted / uk
there are many reason behind the use of 5o hz ...
1. in india all power plant set on the basis of given formula.
F = (P * N) / 120
where F = Frequency (in Hz)
P = the number of poles of the generator rotor
N = Speed of generator rotor (in RPM)
F*120=p*N should be equal to 6000.
if the we change the frequency the we have to change the 6000 factor which is uneconomical
2. core is combination of hysteresis loss and eddy current loss
hysteresis loss is directly proportional to the frequency and the eddy loss is directly proportional to square of the frequency. therefore as we increase the frequencies these loss also increase...
3. skin effect is depend on the frequency as we increase the frequency the skin effect is increases in the transmission line and the line become more resistive and copper loss is increase..
4. the using of ferromagnetic substance works efficiently on the frequency in between 44 hz to 70hz and the we go beyond the 70hz the life of the substance is decreases....
Is This Answer Correct ? | 5 Yes | 1 No |
Post New Answer View All Answers
How will you justify IR value and Charging voltage of any motor,transformer and Cables.......???? . . . . . . . . Plz tell me any body Baljeet Singh, engineer_89@refiff.com
Why neutral point is consider as zero potential?
how can i improve the power factor in domestic (230v)
area control error
A ii kv 1200 A Breaker combination fixed in a cubicle. How many ampere Fuse is required? If fuse is not using, Why?
11 kV line deraction check by an Engineer.
What is highest size of HT motor like 11 kv or 33 kv,and how to make it 750 rpm.i think the size will be very big.any idea ? pl. reply..
condition Autotrip facia come on control panel of electrical transmission line?
Why lose 1 phase voltage in 33kv to 415v stepdown transformer
is it necessary to earth the rmu before cutting off the transformer winding?if yes why?
What happens to a motor if it is connected in Delta connection
Define transfer function?
How cmd is calculated in case of energy neters
What is limitedly stable system?
Define super node?