PDF - 9Mo - Grande Dixence SA

GD. P.64The CEG enables a large number of operations to beremotely controlled at all times. Its remit covers all aspectsof the energy chain.Generation: the CEG supervises and controls the powerplants. The start-up, shutdown and loading of the generatingunits are remotely controlled from Lausanne.Transmission: once generated, the electricity must berouted to the distributor or the consumer, via very highand high voltage networks. Operating, supervising andremotely controlling the network are key tasks. Themanagement of the transmission network also impliesan ability to respond instantaneously to the slightestincident (overload, overvoltage, activation of alarms,equipment alerts etc).Control area: the CEG must ensure a balance at alltimes between what is produced or received over thegrid and what customers need. Because electricitycannot be stored, this means checking that the quantityof energy produced always matches the quantityconsumed.Sales: each shareholder of Grande Dixence SA managesthe commercialization of its share of the electricitygenerated by Grande Dixence. Using the tremendousasset constituted by the flexibility of the storage dams,it gives instructions each day about the use to be madeof the generating stations, as a function of demandand the price of electricity.