On 03/09/2011 07:42 AM, Josepi wrote:
Not completely true.
Only reactive power (RVA) will flow back into the line and no "real"
power will flow into the line,except for losses due to heat in the
"consumption" direction.

Nope, it is called an induction alternator, and definitely can generate
real power, as opposed to reactive. They are often used in small
hydropwer systems, and use the grid as backup and for regulation.
However, there ARE some people who have rigged these up as prime
alternators, and use various schemes to achieve regulation of both
voltage and frequency.


This is nicknamed "rotating capacitor" by some electric utilities and
used to correct power factor on lines and systems.

There used to be large motors used for phase angle correction in large
factories, etc. They had a wound field, and the excitation was
controlled by a phase angle meter, to correct the power factor drawn
from the utility grid. They got a big break on their electric bill for
using such a device. Often called a "rotary condenser".

Jon