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If we assumed that PV generator is connected to the main grid, as the PV depends on solar irradiance it is considered to be a variable source.

If the PV source can cause variations that could be transmitted to the main grid, why would the main grid be shut down?

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  • \$\begingroup\$ Suppose the total demand is 10GigaWatts, with solar providing 8GW. Thus 2GW comes from coal or nuclear or hydro or wind. And suppose the grid has no more plants to bring online. Now, have a storm roll in, shutting down 5GW of solar (about 40by40 square miles of solar power). What do do? rolling power shutdowns? \$\endgroup\$ – analogsystemsrf Nov 6 '19 at 12:00

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