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Daniel who wants to know Daniel who wants to know is offline
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Default Feeding solar power back into municipal grid: Issues and finger-pointing

"Home Guy" wrote in message ...

I'm claiming that there won't be a corresponding voltage down-regulation
at the level of the neighborhood distribution transformer to make the
effort worth while for all stake holders.


Oh but there is. Look around and you will see an occasional unit that looks
like a pole pig (transformer) with no low voltage wires attached, just the
high voltage ones. This is either a line reactor of some kind (inductor or
capacitor) or an on-load tap changer, which is an autotransformer that
automatically changes winding taps as needed to maintain the output voltage
within the 5 or 10% of spec.

If the load on it is say 50KVA and you switch on a GTI with a perfect 1.0
power factor and outputting 25KW the load on that transformer will drop to
25KVA, since all wiring has some resistance this will cause the voltage to
rise the same as if half of the load were switched off, the tap changer
responds after a delay period by changing taps which lowers the output
voltage back down.