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Bruce Richmond Bruce Richmond is offline
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Default Feeding solar power back into municipal grid: Issues and finger-pointing

On Apr 13, 12:06*am, "
wrote:
On Tue, 12 Apr 2011 18:50:22 -0700 (PDT), Bruce Richmond
wrote:





On Apr 11, 2:19 am, David Nebenzahl wrote:
On 4/10/2011 10:02 PM Bruce Richmond spake thus:


On Apr 10, 3:54 am, David Nebenzahl wrote:


That second statement is correct: you can't "push" electrons into
the grid. But it doesn't matter *how* your inverters are working;
it's a basic law of physics.


If you apply more volts to a line than what it is carrying what do you
think happens? I run machines that use regenerative braking. They
draw energy from the line to set things in motion. To slow or stop
them the electric motor acts as a generator producing a higher voltage
than the grid, forcing power back into the grid. An inverter can do
the same thing using solid state circuits. The inverter in my Prius
takes DC current from the battery and converts it to whatever voltage
and frequency is needed at the time to run the variable frequency AC
motor. When slowing down the motor becomes an AC generator and the
inverter converts the output to a DC voltage just a bit higher than
the battery, pumping charge back into it.


Sorry, I don't think you know what you're talking about.


If you do a little research I think you will change your mind.


http://en.wikipedia.org/wiki/Grid_tie_inverter


At the bottom of that page you will find this link


http://www.solarpanelsplus.com/solar...r-Inverters-Wo...


You seem to think that you can "force" or push "voltage" into a line, by
using a higher voltage than what's on the line.


More specificly I wrote, "forcing power back into the grid". *Power is
watts or KW. *That's volts times amps. *


But watts is *not* volts times amps, in an AC circuit. *There is a power
factor in there to worry about. *In the capacitor example, watts dissipated is
zero (or close to it) but VA might be rather high.


Do you think they need one more thing they don't understand? ;-)


The current will only flow if there is a difference in voltage.


Correct. *Ohms Law.- Hide quoted text -

- Show quoted text -