Ligne 120 KV - (Henri-Paul-Sombernon)

## Présentation:

La ligne électrique à 120 kilovolts reliant Henri-Paul à Sombernon était une ancienne interconnexion électrique de la région Bourgogne Franche Comté.

Chargement de la 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class=\"mw-parser-output\"\u003E\u003Cp\u003EHenri-Paul\n\u003C/p\u003E\u003C/div\u003E","title":"Henri-Paul\n","link":"","lat":46.74699031860491,"lon":4.502276754675054,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ESombernon\n\u003C/p\u003E\u003C/div\u003E","title":"Sombernon\n","link":"","lat":47.30643830986867,"lon":4.721355622365548,"icon":""}]}
## Historique:

Les origines de la ligne remontent à la mise en service en 1924 du barrage de Chancy Pougny à Challex, sur la frontière Franco-Suisse. Son but initial était d'approvisionner en énergie les usines métallurgiques du Creusot et le groupe Schneider & Cie avait pour cela fait construire une ligne double à 120 000 volts de 140 km achevée en 1926. Celle-ci arrivait à Ecuisse au poste de transformation *Jeanne Rose* (appelé aujourd'hui *Henri-Paul*) d'où le courant était ensuite distribué sous la tension de 45 KV.

Mais comme le Creusot ne pouvait absorber toute l'énergie produite par le barrage, il fallait vendre l'excédent dans les départements voisins de la Nièvre et de la Côte d'Or. La famille Schneider étendit donc son programme de transport de force avec deux autres lignes à 120 KV, dirigées vers Sombernon au Nord et Garchizy (près de Nevers) à l'Ouest. Le groupe, associé à la Société Anonyme des Mines de Blanzy, fonda ainsi la *Compagnie Bourguignonne de Transport d'Energie* (BTE), destinée à transporter et livrer l'électricité.

Cette ligne électrique est donc construite en 1926, et permettait de relier le poste d'Henri-Paul au poste de Sombernon (permettant l'alimentation de Montbard et de Dijon par l'intermédiaire de deux lignes de 72 KV).

En 1960, la tension de la ligne a été rabaissée à 63 KV afin d'être raccordée en piquage au nouveau poste d'Épinac et est connectée à la ligne à 72 KV reliant Sombernon à Vieilmoulin (baissant ainsi sa tension). En 1964, elle fut connectée au poste de Crugey et entre 2002 et 2006 au poste d'Aray le Duc (c'est à ce moment là que la section entre la limite de la Saône et Loire et Vic des Prés fut démontée).

L'actuelle ligne Épinac-Henri-Paul a subit une lourde modernisation vers la fin de l'année 2018 tandis tout comme la ligne Arnay-le-Duc-Crugey-Vieilmoulin fin 2019. Cela à conduit au remplacement de tous les anciens pylônes Nappes datant de 1926 par de nouveaux pylônes, d'une adaptation du tracé et du changement des conducteurs.

## Description du tracé:

* La ligne électrique débutait au poste d'Henri Paul, elle passait ensuite sur la N74, puis sur la voie ferrée Nevers-Chagny.
* Elle se poursuivait au dessus de l'étang de Montaubry puis traversait la N484.
* Elle croisait la N78 à proximité de Couches, la N73 vers Saisy puis coupait la N6 vers Val Mont.
* Après être passée sur le canal de Bourgogne, elle arpentait les collines jusqu'au sud de la N5 ou elle s'arrêtait au poste de Sombernon.

## Tronçons récupérés pour la création de nouvelles lignes:

1. Ligne 63 KV - (Henri-Pau-Épinac-Vieilmoulin) - Piquage.
2. Ligne 63 KV - (Henri-Paul-Crugey-Vieilmoulin) - Piquage.
3. Ligne 63 KV - (Épinac-Henri-Paul).
4. Ligne 63 KV - (Arnay-le-Duc-Crugey-Vieilmoulin) - Piquage.