Suite une baisse du vent, le reseau d'électricité espagnol à failli avoir un black out
Coupure d'électricité pour les principaux utilisateurs
Mark Duchamp
Tel: +34 679 12 99 97

Madrid, mercredi mars 2005
(Extraits/traduction JL butré)

Hier, comme le vent a diminué, l'opérateur espagnol REE (Electrica rouge Española) a informé 300 utilisateurs importants d'électricité qu' il allait utiliser la clause d'interruption de leur contrat. Puis il leur a coupé l'électricité L'objectif était de réduire la consommation globale de 2.000 MW, pour éviter une rupture totale possible.
Depuis décembre, l'Espagne a survécu à plusieurs périodes froides (neige sur les plages de Javea et de Mallorca, du jamais vu en 20 ans)
Hier, la neige a déclenché à nouveau le chaos une fois de plus sur une grande partie des routes dans la moitié nord du pays.
Quand la nuit est venue, Les themomètres étaient cassés dans un certain nombre de provinces. Dans Valle de Salazar, Navarra, une station météorologique enregistrée-24°C. En conséquence la consommation de l'électricité, était au plus haut le 1er mars, faisant une pointe à 40.340 MW à 7,49 P.m., mais au-dessous record de
43.708 MW établis le 27 janvier.
Cependant, il n'y avait eu aucun arrêt partiel en janvier. Pourquoi cela a mal tourné le 1er mars?
Sur Litoral , à environ 7 P.m., un bulletin d'informations radio a mentionné l'interruption partielle dans l'approvisionnement de l'électricité, du fait que le vent était tombé ce qui qui a eu l'effet de réduire la production de 11.000 éoliennes à 700 MW.
Le jour suivant, L'EXPANSION de jounal de l'economie dit la même chose:
peu de vent, 800 MW ont été produit patr les éoliennes espagnoles malgré leur capacité installée de 8.000 MW. (1)
Mais cette cause, réelle et inscrite sur le siet web de REE's grace aux graphiques de temps réel (2), était modifiée en faveur d'une histoire autre dans un article très court de 27 mots concernant l'energie du vent:
Voici ce que l'article a choisi de relater:
En raison du mauvais temps, trois méthanier n'ont pas pu débarquer dans les ports de Barcelone, sinus et de Huelva..... Et ceci a pu altérer la marche des centrales à gaz (l'Espagne a les usines modernes de CCGT d'une capacité installée combinée de 8.259 MW). Ainsi il a été décidé d'applique la clause d'interruption pour les 300 grands utilisateurs afin d'éviter un arrêt total possible.
Question: étaient vrais que les stpocks espagnols de GNL étaient tellement bas pour que le retard de 3 citernes de gaz ait pu causer un arrêt total?
Le journal ne mentionne pas le niveau des stocks de gaz. Et l'opérateur du Le réseau espagnol d'offre de gaz, ENAGAS, a indiqué que la pression dans les conduites était normle et que tous les clients ont été fournis en gaz. ENAGAS a ajouté, cependant, qu'ils avaient conseillé à certains de leurs clients de moduler leur consommation. Et les usines de CCGT qui peuvent employer comme carburant de l'huile comme alternative ont été conseillées de la faire. En un mot, ceci afait diversion pour ne pas mettre en evidence lavérité sur la crise: La baisse de production des éoliennes, cause principale des problèmesd'approvisionnement en éléctricité de l'Espagne...


Mark Duchamp
Tel: +34 679 12 99 97


The views expressed below are my personal views. I am not expressing any official position of Proact International, of whichI am the Windfarm/Bird Research Manager - www.proact-campaigns.net
Madrid, Wednesday March 2nd 2005

Yesterday, as the wind rapidly abated, the Spanish grid operator REE (Red Electrica Española) advised 300 heavy electricity users it was going to avail itself of the interruption clause in their contract. Then, their electricity supply was cut off.The effect was to reduce overall demand by 2,000 MW, and avoid a possible blackout.Since December, Spain has weathered several cold fronts that brought snow to the beaches of Javea and Mallorca, something unseen in 20 years. Yesterday, snow brought chaos once more to much of the
road network in the northern half of the country. When night came, March temperature records were broken in a number of provinces. In the Valle de Salazar, Navarra, a weather station recorded minus 24.8º Celcius.Electricity consumption, in such weather, was high on March 1st, peaking at 40,340 MW at 7.49 PM, but below the all-time record of
43,708 MW established on January 27th.However, there was no brownout in January. So what went wrong on March 1st?On Radio Litoral, at about 7 PM, a news bulletin mentioned the partial interruption in the electricity supply, saying the wind had dropped, which had the effect of reducing the production of 11,000 windmills to 700 MW.Next day, the business paper EXPANSION said much the same thing: little wind, 800 MW produced by the Spanish windfarms in spite of their installed capacity of 8,000 MW. (1)But this cause, which is very real and documented on REE's website in real-time graphs (2), was taken off centre-stage in favour of a side-story. And the dismal windpower performance was given 27 words
in the body of the article.- Political correctness at work?
Here is what the article chose to relate at length:
Because of bad weather, three methane carriers could not dock in the harbours of Barcelona, Sines and Huelva. This prompted REE to worry that gas pressure in the feeders (gas pipelines) might slacken due to the high demand level. And this could impair the performance of gas-fired power plants (Spain has modern CCGT plants with a combined installed capacity of 8,259 MW). So the decision was made to activate the interruption clause with the 300 large users so as to avoid a possible blackout.Question: were Spanish stocks of LNG so low that a delay in the docking of 3 gas tankers could cause a blackout? The newspaper does not mention the level of gas stocks. And the operator of the
Spanish gas supply network, ENAGAS, said that pressure in the feeders was normal and that all customers were supplied with the gas they required.ENAGAS added, however, that they had advised some of their clients to modulate their consumption. And CCGT plants that can use fuel oil as an alternative were advised to do so.In a nutshell, this is side-tracking from the main cause of the crisis: an important drop in the average windspeed over Spain during a peak in demand (see real time graphs - (2) below). For if this had not happened, there would have been no need to cut off the supply of 2,000 MW.A few hours into the brownout, 1,400 MW were imported from France.
After 8 PM, demand began to abate, as it normally does on weekdays at that time. And REE resumed supplying electricity to the 300 large customers, some of which no longer needed it by then.
The EXPANSION article (1) concludes with two opposite quotes: one, from an electricity company, boasting that the system was able to cope thanks to the CCGT plants; the other, from another company, pointing to the advisability of not phasing out coal-fired power stations.The most obvious conclusion was left out: windfarms are unreliable
and will let you down when you need them most (cold snaps as well as heat waves normally combine high electricity demand and a lack of wind).
The upshot is that, for every 1,000 MW of windpower installed capacity, new conventional generating unit(s) able to deliver 1,000 MW should be built as back-up - preferably not gas-fired.For indeed, what if more of the Spanish generating capacity had been inoperative due to maintenance & repair? If we are to believe the article, only 5,000 out of 66,700 MW generating capacity were out of commission on brownout-Tuesday. So the outcome could have been much worse.This back-up requirement will further increase the already
exorbitant cost of windpower, as two power stations are needed to do the job of one. And consumers will pay the price, as they now do in Denmark with domestic electricity prices c. 100% higher than in the UK.
Germany also found that out, from an official report that was quickly shelved by the windpower-bent coalition government of Greens and Social Democrats.The report was leaked out to Der Spiegel, however, who exposed thedisturbing news in an article (English translation available from the undersigned upon request).But judging from the way the Spanish media treated the March 1 brownout, Madrid may well slip the issue under the carpet - till repeated blackouts force a decision further down the road. Much
unnecessary damage will have been done by then, to the landscape, to the birds, to our quality of life.Spanish politicians want to cling to their green image, and
windfarms are the easiest way towards that end. - Yet, real solutions exist for the reduction of our emission levels (3). It is up to the media to take their responsibilities, and inform the
public. For nobody else will.

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