Overview
ABSTRACT
The function of the electricity transmission network (ETN) is to convey the energy from the generation centers to the consumption or delivery points. It is composed of overhead or underground lines that form a "grid" connecting various parts of the country and pools production facilities towards the end customers. This network is composed of electrical nodes called "substations" whose function is threefold: routing lines of the same voltage between themselves, the evacuation of energy from the sources of generation to the network and the connection between networks of different voltages. The architecture of the substations complies certain specific rules in accordance with their importance, the number of structures that they connect, the voltage level and the level of security sought. This article discusses the different architectures of existing electricity transmission network substations specifying the roles and potential advantages and disadvantages.
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Louis DEVATINE : Engineer from the École supérieure d'électricité - Deputy Head of Substations Department at RTE's National Network Expertise Centre - Update of Jean-Michel DELBARRE's 1993 article
INTRODUCTION
The role of the transmission network is to transport energy from production centers to consumption points or delivery points. It is made up of overhead or underground lines forming a meshed network linking different points in the country, enabling the pooling of production resources that supply end customers. This network is made up of electrical nodes called "substations", which have a triple function:
the interconnection of lines of the same voltage;
evacuation of energy from generation sources to the grid;
the connection between networks with different voltages.
The architecture of substations is governed by a number of specific rules, depending on their size, the number of facilities they connect, the voltage level and the level of safety required. This document sets out the different substation architectures available to RTE, specifying their roles, advantages and possible disadvantages.
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