Operating France's gas grid; Gaz de France depends on sophisticated communications

At Gaz de France, the means used for monitoring and intervention have developed as the transmission network has evolved. The control system for GdF's transmission network is described. It is designed to manage: compressor stations; metering and automatic control stations; pressure pre-regulating stations, city-gate stations and off-take stations for industrial users linked to the transmission system; and underground gas storage facilities.