Power factor correction method based on power
capacitors is the biggest group of the devices used in the industry and by the
private users, mainly from economic reasons. On the hand, they may be a reason
of unwanted distortions at the spot of operation. That is why they should be
carefully selected, in accordance with actual standards. In terms of rated
voltage of capacitors we can distinguish two groups of capacitor banks. Like
most electric equipment, generators are limited by their current-carrying
capability. Reactive power production is depended on the field heating limit
and absorption on the core end-heating limit of the generator.
capacitors is the biggest group of the devices used in the industry and by the
private users, mainly from economic reasons. On the hand, they may be a reason
of unwanted distortions at the spot of operation. That is why they should be
carefully selected, in accordance with actual standards. In terms of rated
voltage of capacitors we can distinguish two groups of capacitor banks. Like
most electric equipment, generators are limited by their current-carrying
capability. Reactive power production is depended on the field heating limit
and absorption on the core end-heating limit of the generator.
Active power output limit is limited by armature
heating. Control over the reactive output and the terminal voltage of the generator
is provided by adjusting the DC current in the generator’s rotating field.
Control can be automatic, continuous, and fast. The inherent characteristics of
the generator help maintain system voltage. At any given field setting, the
generator has a specific terminal voltage it is attempting to hold. If the
system voltage declines, the generator will inject reactive power in to the
power system, tending to raise system voltage. If the system voltage rises, the
reactive output of the generator will drop, and ultimately reactive power will
flow into the generator, tending to lower system voltage. The voltage regulator
will accentuate this behaviour by driving the field current in the appropriate
direction to obtain the desired system voltage.
heating. Control over the reactive output and the terminal voltage of the generator
is provided by adjusting the DC current in the generator’s rotating field.
Control can be automatic, continuous, and fast. The inherent characteristics of
the generator help maintain system voltage. At any given field setting, the
generator has a specific terminal voltage it is attempting to hold. If the
system voltage declines, the generator will inject reactive power in to the
power system, tending to raise system voltage. If the system voltage rises, the
reactive output of the generator will drop, and ultimately reactive power will
flow into the generator, tending to lower system voltage. The voltage regulator
will accentuate this behaviour by driving the field current in the appropriate
direction to obtain the desired system voltage.
