wat is the role of reactive power in power generation?why
we have maintain it.
Answers were Sorted based on User's Feedback
Answer / kapil soni
Electrical machines work on the principle of conversion of
electromagnetic energy.A part of input energy is consumed
for creating and maintaining the magneticfield.This part of
the input energy cannot be converted into active energy and
is returned to the electrical network on removal of the
magnetic field. This power is known as “reactive” power Q.
The Q Power flows back and forth, causing 90º Out of phase
shift between the current and voltage waveform.This
Reactive Power has one half of the Power In the positive
area and the other half in the negative area.
Unlike true power, reactive power is not useful power
because it is stored in the circuit itself.
This power is stored by
Because they expand and collapse their magnetic
fields in an attempt to keep current constant,
2) Capacitors, Because they charge and discharge in an
attempt to keep voltage constant.
|Is This Answer Correct ?||18 Yes||4 No|
Answer / pradeep
reactive power is mainly involve in the transmission line.
in transmission line, they have resistance,
inductance,capacitance.. these are all either store the
energy or dissipate the energy. so that we have a some
losses in the transmission line. this losses will reduce the
generating power and finally we get the power less than the
sending power. generally the output of the generating unit
is represent as kva. apparent power=real power + reactive powr..
real power is part of the power which is used by loads and
then reactive power is not a usefull power.by connecting the
shunt capacitor in parallel we easily inject the reactive
power to the line,becoz capacitor having a leading current
which minimize the lagging current produced by inductance.
reactive power is also called as imaginary power which is
not used for else..
|Is This Answer Correct ?||4 Yes||8 No|
Answer / kani
The role of reactive power is very important in power
generation as generation revolves around the priciple of
induction.This is the cause for magnetic field by which the
power is gererated.
Reactive power=VI SinQ
If the phase angle between voltage and current is zero then
sinq=0 ,there is no reactive power ,there is no magnetic
field ,there is no power generation
|Is This Answer Correct ?||1 Yes||5 No|
What happen if field ckt is open when a sailent pole alternator connected to infinite bus
why transformer comes only in standard rating like 11kv,33kv,66kv....and not like 33.33kv and so on?
what is motor
which is the gas used in tube light?
what is the pi test for current transformer?
what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker
What is a fuse? How does it work? What are materials used?
what are the units of cable insulation?
Why Lighting transformers are used? what will be the current if lightings connected through direct raw power?
respected sir, sir recentely i have applied for chennai and tiruvananthapur section enggineer and juniour engg in electrical dept. but still i donot get how i have to syart my preparation and also t the same time i donot know exactly what they r going to give in the examinations i mean which sections they r going to give i donot know exactly, can u prefer whichh books i have to follow and model papers or both boards
Why a transformer is rated in kVA and not in kW??
what are the main parts of UPS what is the function of that?