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Woolinky

918 Posts.

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21/09/19

09:27

Post #: 40505336
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Originally posted by contrabunta: ↑

"Solar generation. I know Melbourne isn't the biggest in terms of daylight.."

How do you plan to solve the little problem of voltage regulation out there in suburbia. All those grid-connected solar systems busily trying to raise the grid voltage just that little bit more than their neighbour so that they get the feed in. Meanwhile, just down the street, another appliance goes boom. Crazily, it wasn't designed for >255Vac(rms).

Luckily, our federal guvnent, for mainly other reasons, decided a while back that our nominal supply voltage would be better as 230Vac(rms)[+10,-6%] versus the historic 240Vac (rms)[+/-6%]. Unfortunately, our state guvnents actually implement the grid and have only just started to implement the change. So, eventually, fewer appliances should be generating harmful smoke prior said appliance death.

The real problem of solar inverter feed-in voltage remains unsolved. In the opinion of this humble EE it would likely only *be* solved with duplicate 415V wiring and local distribution transformers capable of merging solar feed-in with already regulated supply via additional tap-change. Making the whole idea of solar feed-in substantially more expensive and potentially non-viable.

Why didn't our environmental planners foresee this? Are they complete idiots?

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Run two or three phase and have one phase directly feeding back into the grid?
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