Re: Causes of the Gran Apagón (Spain), 65 corrective actions

On Thu, 10 Jul 2025 13:51:57 +0200, Carlos E.R. wrote:
 

On 2025-07-10 13:27, Glen Walpert wrote:

On Thu, 10 Jul 2025 02:27:53 +0200, Carlos E.R. wrote:
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On 2025-07-09 23:49, Glen Walpert wrote:

On Wed, 9 Jul 2025 23:07:26 +0200, Carlos E.R. wrote:

On 2025-07-09 22:57, Joe Gwinn wrote:

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instalacion-de-compensadores-sincronos-y-refuerza-la-interconexion-

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But I don't get where the capacitor relationship comes in. Do they have
capacitors somewhere?

 They only have a few small capacitors in the control circuits, not
directly line connected, but the rotating machine can behave like a
capacitor (condenser is an old term for capacitor) in that when
overexcited current leads voltage, providing reactive power to inductive
loads where current lags voltage.

Reactive power is out of phase with
voltage and adds current to the distribution system without carrying any
real power (while incurring real losses), what it does is provide the
field in all of the many induction motors on the grid.  Capacitors are
often used near loads to reduce reactive power losses, the synchronous
condenser does the same thing as well as providing stabilization by
responding to grid voltage variation with automatic changes in reactive
power (which has a stronger influence on grid voltage than real power).
 You can find good descriptions of reactive power many places, but it is a
somewhat complex subject.