RTE, France's electricity transmission system operator, has a public service mission: to guarantee the supply of electricity at all times and with the same quality of service throughout France, thanks to the mobilisation of its 10,025 employees. RTE manages electricity flows and the balance between production and consumption in real time. RTE maintains and develops the high and extra-high voltage network (from 63,000 to 400,000 volts), which consists of almost 100,000 kilometres of overhead lines, 7,000 kilometres of underground lines, 

2,900 substations in operation or joint operation and around fifty cross-border lines. The French network, which is the most extensive in Europe, has 37 interconnections with its neighbouring countries. As a neutral and independent industrial operator of the energy transition, RTE optimises and transforms its network to new low-carbon electricity consumption and production facilities, regardless of future energy choices.