G99 knocked back by DNO - trying understand proposed "reinforcemen"
Thanks for getting in contact regarding an application for a 5kW battery and 5kW kW solis inverter, the battery will be limited to 0 export therefore this will be a total capacity of 10kW limited to 5kW export
Unfortunately the volt rise is too high for the proposed capacity at 3.37%, the g99 limit is 1.3% and G100 limit is 2.3%.
Would that voltage be the LV, ie the rise in our house mains voltage? Or the effect on the 11kV?
Their proposed solution is what they call "reinforcement"
"SSEN will look to tap the 15kVA transformer to bring the volt rise rise within limits ... If the transformer does not have a tap changer however, further reinforcements would be needed"
How would that work? Changing tapping on the transformer changes the voltage, but surely the voltage rise will remain more or less the same. And if they are reducing our LV voltage then the effect on the 11kV will actually be greater.
I'm trying to understand all this because I would be really disappointed to have to can our project or pare it right back. But equally I content to write a blank cheque to SEEN for works that might not do the trick or have undesired side effects.
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