{"id":4909,"date":"2021-10-29T09:27:43","date_gmt":"2021-10-29T07:27:43","guid":{"rendered":"https:\/\/sceaux-lagazette.fr\/?p=4909"},"modified":"2021-11-20T08:18:56","modified_gmt":"2021-11-20T07:18:56","slug":"dou-viendra-notre-electricite-demain","status":"publish","type":"post","link":"https:\/\/sceaux-lagazette.fr\/index.php\/2021\/10\/29\/dou-viendra-notre-electricite-demain\/","title":{"rendered":"D\u2019o\u00f9 viendra notre \u00e9lectricit\u00e9 demain ?"},"content":{"rendered":"\n<p>RTE (le \u00ab\u00a0gestionnaire\u00a0\u00bb du r\u00e9seau de transport \u00e9lectrique)<a href=\"https:\/\/assets.rte-france.com\/prod\/public\/2021-10\/Futurs-Energetiques-2050-principaux-resultats_0.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"> a publi\u00e9<\/a> ce lundi 25 octobre le r\u00e9sultat de ses \u00e9tudes prospectives sur les futurs \u00e9lectriques \u00e0 l\u2019horizon 2050. Elles s\u2019inscrivent dans un cadre affich\u00e9\u00a0: la neutralit\u00e9 carbone pour la France \u00e0 cet horizon.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">La question du 100% renouvelable<\/h2>\n\n\n\n<p>Parmi les 6 hypoth\u00e8ses envisag\u00e9es (et d\u00e9j\u00e0 connues) figuraient 3 sc\u00e9narios sans construction de nouveau r\u00e9acteur nucl\u00e9aire, dont un sc\u00e9nario 100 % renouvelable. Le 27 janvier 2021, une premi\u00e8re \u00e9tude <a href=\"https:\/\/assets.rte-france.com\/prod\/public\/2021-01\/RTE-AIE_synthese%20ENR%20horizon%202050_FR.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">avait montr\u00e9<\/a> qu\u2019un sc\u00e9nario avec une tr\u00e8s forte proportion de renouvelables \u00e9tait envisageable \u00e0 condition de respecter strictement quatre objectifs techniques&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Assurer la stabilit\u00e9 du syst\u00e8me (maintenir la fr\u00e9quence de 50 Hz)<\/li><li>Assurer l\u2019ad\u00e9quation besoin\/ressources gr\u00e2ce \u00e0 d\u2019importantes solutions de flexibilit\u00e9 (pilotage de la demande, stockage\u2026)<\/li><li>Am\u00e9liorer les pr\u00e9visions de la production (\u00e0 court terme)<\/li><li>Construire un r\u00e9seau de transport \u00e9lectrique suffisant<\/li><\/ul>\n\n\n\n<p>Les \u00e9nergies renouvelables en d\u00e9veloppement (\u00e9olien et solaire) se caract\u00e9risent en effet par une forte variabilit\u00e9 subie en fonction des conditions m\u00e9t\u00e9orologiques. Cette variabilit\u00e9 est aujourd\u2019hui compens\u00e9e par les autres sources du mix, mais cela devient de plus en plus difficile si la part du renouvelable augmente. Il faut donc investir, en compl\u00e9ment du renouvelable, et se doter de moyens pouvant faire face \u00e0 cette difficult\u00e9.<\/p>\n\n\n\n<p>La question \u00e9tait donc pour beaucoup d\u2019<a rel=\"noreferrer noopener\" href=\"https:\/\/www.lemonde.fr\/blog\/huet\/2021\/02\/15\/nucleaire-ou-renouvelables-le-vrai-debat\/\" target=\"_blank\">observateurs<\/a>&nbsp;: dans quelle mesure les co\u00fbts de ces compl\u00e9ments vont-ils affecter la rentabilit\u00e9 du renouvelable par rapport au nucl\u00e9aire&nbsp;?&nbsp;<\/p>\n\n\n\n<p>L&rsquo;\u00e9tude s&rsquo;est faite autour de 6 sc\u00e9narios :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>M0 : 100 % renouvelables<\/li><li>M1 : solde de nucl\u00e9aire du parc actuel (16 GW) et implantation diffuse des renouvelables<\/li><li>M3 : solde de nucl\u00e9aire du parc actuel (16 GW) et grands parcs \u00e9oliens<\/li><li>N1 : nouveau nucl\u00e9aire : 8 EPR en 2050<\/li><li>N2 : nouveau nucl\u00e9aire : 14 EPR en 2050<\/li><li>NO3 : 50 % de nucl\u00e9aire avec 14 EPR et prolongement + important du parc actuel<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Principaux r\u00e9sultats<\/h2>\n\n\n\n<p>Le <a href=\"https:\/\/www.rte-france.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">rapport complet<\/a> fait 650 pages, et <a href=\"https:\/\/assets.rte-france.com\/prod\/public\/2021-10\/Futurs-Energetiques-2050-principaux-resultats_0.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">sa synth\u00e8se<\/a> 64&nbsp;: on ne reprendra ici que quelques r\u00e9sultats cl\u00e9s&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Forte baisse de la consommation d\u2019\u00e9nergie en parvenant \u00e0 -40 % d\u2019ici 2050 ET augmentation importante de la consommation \u00e9lectrique.<\/li><li>N\u00e9cessit\u00e9 \u00e0 court terme (2030) d\u2019investir fortement dans le renouvelable ET de prolonger les r\u00e9acteurs nucl\u00e9aires existants.<\/li><li>Pour 2050, les sc\u00e9narios les plus \u00e9conomiques et r\u00e9alistes conjuguent investissements importants dans le nucl\u00e9aire, le renouvelable, le stockage, l\u2019hydrog\u00e8ne, le r\u00e9seau de transport fran\u00e7ais et les r\u00e9seaux permettant d\u2019exporter et importer l\u2019\u00e9lectricit\u00e9.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u00c9volution de la consommation<\/h2>\n\n\n\n<p>Sur les 1600 TWh d\u2019\u00e9nergie consomm\u00e9s annuellement en France aujourd\u2019hui, seuls 460 TWh sont sous une forme \u00e9lectrique, produits de mani\u00e8re \u00e0 peu pr\u00e8s d\u00e9carbon\u00e9e. Les \u00e9nergies fossiles sont nettement majoritaires.<\/p>\n\n\n\n<p>Pour ramener les \u00e9nergies fossiles \u00e0 une part proche de z\u00e9ro, le sc\u00e9nario de base conjugue une forte baisse de la consommation totale et une \u00e9lectrification de cette consommation. Par exemple par l\u2019isolation des logements ou le passage \u00e0 des voitures \u00e9lectriques.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"508\" src=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Consommation-finale-2050-rapport-RTE-1024x508.png\" alt=\"\" class=\"wp-image-4913\" srcset=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Consommation-finale-2050-rapport-RTE-1024x508.png 1024w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Consommation-finale-2050-rapport-RTE-300x149.png 300w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Consommation-finale-2050-rapport-RTE-768x381.png 768w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Consommation-finale-2050-rapport-RTE.png 1151w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>(*) SNBC&nbsp;: Strat\u00e9gie nationale bas carbone<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Le court terme<\/h2>\n\n\n\n<p>La Gazette a expliqu\u00e9 r\u00e9cemment la n\u00e9cessit\u00e9 de prendre des d\u00e9cisions pour le nucl\u00e9aire. Il s\u2019agit d\u2019abord de poursuivre les op\u00e9rations en cours pour prolonger les r\u00e9acteurs actuels (grand car\u00e9nage), mais aussi de lancer la construction d\u2019une nouvelle g\u00e9n\u00e9ration. On notera que plusieurs candidats \u00e0 la pr\u00e9sidentielle ne veulent ni du prolongement du parc actuel, ni du lancement de nouveaux outils.<\/p>\n\n\n\n<p>Mais prolonger le parc actuel ne suffit pas pour faire face aux besoins d\u2019ici 2030, car :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Il est pr\u00e9vu de fermer rapidement les derni\u00e8res centrales \u00e0 charbon,<\/li><li>Les quatri\u00e8mes visites d\u00e9cennales par l\u2019ASN correspondent \u00e0 des arr\u00eats longs (de l\u2019ordre de 6 mois&nbsp;!)&nbsp;: elles vont diminuer la disponibilit\u00e9 du parc,<\/li><li>Les \u00e9lectrifications en cours, dans les transports notamment, vont augmenter les besoins).<\/li><\/ul>\n\n\n\n<p>Le contexte europ\u00e9en est aussi celui d&rsquo;une fermeture progressive d&rsquo;outils de production, augmentant le risque de d\u00e9faut du syst\u00e8me (<a href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2021\/02\/05\/blackout-electrique-evite\/\" target=\"_blank\" rel=\"noreferrer noopener\">black out<\/a>) :<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"748\" height=\"720\" src=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Evolution-CT-du-parc-\u00e9lectrique-europ\u00e9en.png\" alt=\"\" class=\"wp-image-4915\" srcset=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Evolution-CT-du-parc-\u00e9lectrique-europ\u00e9en.png 748w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Evolution-CT-du-parc-\u00e9lectrique-europ\u00e9en-300x289.png 300w\" sizes=\"(max-width: 748px) 100vw, 748px\" \/><\/figure>\n\n\n\n<p>M\u00eame en lan\u00e7ant la construction de nouveaux EPR cette ann\u00e9e, ils ne seront pas op\u00e9rationnels en 2030. Dans une perspective d&rsquo;augmentation des besoins, il faut donc installer de nouveaux renouvelables, en particulier r\u00e9aliser les op\u00e9rations d\u00e9j\u00e0 pr\u00e9vues. La solution alternative, installer des centrales \u00e0 gaz, ne correspond pas vraiment \u00e0 l\u2019objectif de r\u00e9duction des \u00e9missions de GES.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"605\" height=\"275\" src=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Production-\u00e9lectrique-en-2030.png\" alt=\"\" class=\"wp-image-4916\" srcset=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Production-\u00e9lectrique-en-2030.png 605w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Production-\u00e9lectrique-en-2030-300x136.png 300w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">L\u2019horizon 2050<\/h2>\n\n\n\n<p>Les solutions sans nouveaux \u00e9quipements nucl\u00e9aires se r\u00e9v\u00e8lent plus co\u00fbteuses et impliquent des <em>paris technologiques lourds<\/em>, pour respecter les quatre objectifs \u00e9voqu\u00e9s en d\u00e9but de cet article. <em>Ils n\u00e9cessitent un effort de R&amp; cons\u00e9quent et soutenu<\/em>.<\/p>\n\n\n\n<p>Les causes de ces surco\u00fbts sont li\u00e9es \u00e0 la n\u00e9cessit\u00e9 d\u2019assurer la flexibilit\u00e9 du syst\u00e8me&nbsp;: il faut raisonner en co\u00fbt complet.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"515\" src=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Co\u00fbt-flexibilit\u00e9-2050-1024x515.png\" alt=\"\" class=\"wp-image-4914\" srcset=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Co\u00fbt-flexibilit\u00e9-2050-1024x515.png 1024w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Co\u00fbt-flexibilit\u00e9-2050-300x151.png 300w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Co\u00fbt-flexibilit\u00e9-2050-768x386.png 768w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2021\/10\/Co\u00fbt-flexibilit\u00e9-2050.png 1034w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>En conclusion, il faut \u00e0 la fois la r\u00e9duction forte de la consommation de fossiles&nbsp;; le prolongement et le renouv\u00e8lement du parc nucl\u00e9aire&nbsp;; le d\u00e9veloppement des renouvelables.<\/p>\n\n\n\n<p>Une telle conclusion ne satisfera ni les opposants au nucl\u00e9aire, ni les opposants \u00e0 l\u2019\u00e9olien. Elle laisse des marges de man\u0153uvre aux \u00e9lus&nbsp;: par exemple, 40 % ou 60 % de nucl\u00e9aire paraissent possible \u00e0 l\u2019horizon envisag\u00e9.&nbsp; Cet horizon est lointain mais des d\u00e9cisions sont \u00e0 prendre d\u00e8s maintenant, avec un programme d\u2019investissement important, ne serait-ce que pour r\u00e9pondre aux besoins attendus en 2025, 2030 et 2035<\/p>\n","protected":false},"excerpt":{"rendered":"<p>RTE (le \u00ab\u00a0gestionnaire\u00a0\u00bb du r\u00e9seau de transport \u00e9lectrique) a publi\u00e9 ce lundi 25 octobre le r\u00e9sultat de ses \u00e9tudes prospectives sur les futurs \u00e9lectriques \u00e0 l\u2019horizon 2050. Elles s\u2019inscrivent dans un cadre affich\u00e9\u00a0: la neutralit\u00e9 carbone pour la France \u00e0 cet horizon. La question du 100% renouvelable Parmi les 6&#8230;<\/p>\n","protected":false},"author":11,"featured_media":4918,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[53],"tags":[],"class_list":["post-4909","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-analyses","entry","simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>D\u2019o\u00f9 viendra notre \u00e9lectricit\u00e9 demain ? - La Gazette<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2021\/10\/29\/dou-viendra-notre-electricite-demain\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u2019o\u00f9 viendra notre \u00e9lectricit\u00e9 demain ? - La Gazette\" \/>\n<meta property=\"og:description\" content=\"RTE (le \u00ab\u00a0gestionnaire\u00a0\u00bb du r\u00e9seau de transport \u00e9lectrique) a publi\u00e9 ce lundi 25 octobre le r\u00e9sultat de ses \u00e9tudes prospectives sur les futurs \u00e9lectriques \u00e0 l\u2019horizon 2050. 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