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wat is the role of reactive power in power generation?why
we have maintain it.
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Answer Posted / 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
1)Inductors,
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.
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