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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!weretis.net!feeder8.news.weretis.net!reader5.news.weretis.net!news.solani.org!.POSTED!not-for-mail From: Gerhard Hoffmann Newsgroups: sci.electronics.design Subject: Re: Grand Apagon - Electricity (not) in Spain Date: Wed, 30 Apr 2025 14:11:10 +0200 Message-ID: References: <1rbln2a.1frrgzg19gl8fgN%liz@poppyrecords.invalid.invalid> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Wed, 30 Apr 2025 12:11:10 -0000 (UTC) Injection-Info: solani.org; logging-data="72603"; mail-complaints-to="abuse@news.solani.org" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:LKfWhLm84dW9GbczWL85NZq81bI= Content-Language: en-US X-User-ID: eJwFwQEBACAIA7BKB/yROqj0j+DGkOnkErU4nNhPbwFefTUyv0A4mW01MEbA6iaqPPvY/v2BD6o= In-Reply-To: Bytes: 2509 Lines: 32 Am 30.04.25 um 12:41 schrieb Carlos E.R.: > On 2025-04-30 11:59, Liz Tuddenham wrote: >> Bill Sloman wrote: >> The grid frequency begins to fall so energy from the moving parts is >> converted to electrical power which is fed into the grid to increase. >> the frequency.  This results in a loss of stored mechanical energy which >> causes the turbine to begin slowing down - which is detected by the >> control system and used to feed more water/gas/steam into the turbine so >> its speed is returned to normal. > > I understand that the turbine doesn't actually slow down, because the > generator starts working as a synchronous motor drawing energy from the > network instead; this is detected by the control system and feeds more > water/gas/steam, etc. > > As long as the network keeps the frequency. Actually, the grid frequency is a bit elastic. We had that in the European grid some years ago, when some Balkanese enclaves / exclaves did not care much about cos_phi correction and the grid drifted slooowly to a lower frequency. No bad consequences other than some wall clocks were a few minutes late after a week or two. I found that easy to measure with a time interval counter. (ps resolution in a second elapsed time) < https://www.flickr.com/photos/137684711@N07/38870750440/in/datetaken/lightbox/ > Cheers, Gerhard