·
Loads: A
typical load bus supplied by a power system is composed of a large number of
devices. The composition changes depending on the day, season and weather
conditions. The composite characteristics are normally such that a load bus
absorbs reactive power. Both active and reactive powers of the composite loads
vary due to voltage magnitudes. Loads at low-lagging power factors cause
excessive voltage drops in the transmission network. Industrial consumers are
charged for reactive power and this convinces them to improve the load power
factor.
Loads: A
typical load bus supplied by a power system is composed of a large number of
devices. The composition changes depending on the day, season and weather
conditions. The composite characteristics are normally such that a load bus
absorbs reactive power. Both active and reactive powers of the composite loads
vary due to voltage magnitudes. Loads at low-lagging power factors cause
excessive voltage drops in the transmission network. Industrial consumers are
charged for reactive power and this convinces them to improve the load power
factor.
·
Underground
cables: They are always loaded below their natural loads,
and hence generate reactive power under all operating conditions.
Underground
cables: They are always loaded below their natural loads,
and hence generate reactive power under all operating conditions.
·
Overhead
lines: Depending on the load current either absorb or
supply reactive power. At loads below the natural load, the lines produce net
reactive power; on the contrary, at loads above natural load lines absorb
reactive power.
Overhead
lines: Depending on the load current either absorb or
supply reactive power. At loads below the natural load, the lines produce net
reactive power; on the contrary, at loads above natural load lines absorb
reactive power.
