SW Efficiency/ PWM Angle Adjustment [RE-wrenches]

[Drake Chamberlin - Electrical Energy]

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Hi Wrenches,

To further complicate matters, the energy and economic issues may be 
different with various power factors.  I read once, in an electrical 
engineering textbook, that most utilities bill on the basis of apparent 
power.   That means that reactive power is being billed even though it 
produces no useful work.  This is an old textbook, and could well be out of 
date.

So if an inverter produced a lot of reactance, would the apparent power or 
real power register on the utility meter?   Would putting pure resistive 
power back in the grid have a greater payback than power with a large 
reactive component?  Could we be selling both reactive power and real power 
to the grid?

Bill & Sharkey, thanks to both of you for your many contributions.  I'd 
prefer to see your continued participation.   It is this spirited dialogue 
that allows us to figure out the subtle  points of our increasingly 
technical business.

Drake

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