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A comment on Solar meets 100 percent of South Australia demand for first time. Parent comment

Re:Solar meets 100 percent of South Australia demand for fir... by zaarn on Tuesday October 13, 2020 @04:05AM (#24763341)
In Europe the grid is controlled by the operators, inverters that are grid tied follow the operator commands to increase frequency or decrease frequency. The phase is kept synchronous with UTC.
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Re:Solar meets 100 percent of South Australia demand for fir... by thescriptkiddie on Thursday October 15, 2020 @09:03PM (#24796287)
Do inverters communicate with the grid operator, or do they just monitor the frequency they see on the mains? And how do they all agree on what UTC is with sufficient accuracy? At 50 Hz, a 1% deviation is only 200 uS.
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Re:Solar meets 100 percent of South Australia demand for fir... by zaarn on Friday October 16, 2020 @12:33AM (#24797496)
Modern solar inverters communicate with the grid operators, less modern ones follow the grid frequency. The grid is allowed to deviate from UTC by a few seconds, in some edge cases it ramps up to minutes, but it eventually comes back in sync with UTC. Good enough for kitchen clocks, simple timers and the likes.
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