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From: "Carlos E.R." <robin_listas@es.invalid>
Newsgroups: sci.electronics.design
Subject: =?UTF-8?Q?Re=3A_Causes_of_the_Gran_Apag=C3=B3n_=28Spain=29=2C_65_co?=
 =?UTF-8?Q?rrective_actions?=
Date: Thu, 10 Jul 2025 20:56:05 +0200
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On 2025-07-10 15:50, Glen Walpert wrote:
> 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:
>>>
>>>> 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:
>>>>
>>>>
>>>> ...
>>>>>>>> <https://elperiodicodelaenergia.com/el-gobierno-aprueba-la-
>>>>> instalacion-de-compensadores-sincronos-y-refuerza-la-interconexion-
> con-
>>>>> francia/>
>>>>
>>>> ...


>> 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. 

Ah, got it.

> 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.

I know :-)

-- 
Cheers, Carlos.