sub navigation:
you are here:
Control System for the Swiss Transmission Network in the European Power Grid
The Swiss transmission network operator, Energie Ouest Suisse in Lausanne, generates more than two terawatt-hours of electricity every year, and supplies energy to more than one million consumers via network distributors. As a member of the common European grid, EOS produces green energy from hydropower plants for Switzerland – especially the western part – as well as for France, Germany and Italy.
EOS’s grid covers a line length of ca. 1,800 km at voltage levels of 380/220/65 kV.
EOS is a member of the Union for the Coordination of the Transmission of Electricity (UCTE) which harmonises the operation of the transmission networks in continental Europe.
Due to the imminent opening of the market and the restructuring of Swiss power grids, EOS felt impelled to replace to existing L&G control system and, at the end of 2003, opted for a triple server system IDS HIGH-LEIT, with French as the system language.
Implementation
The objective was to install and commission a replacement for the old system within the shortest possible time, while keeping interruptions of the on-going operations to a minimum. To fulfil this requirement, a data preparation was installed where all data elements of the old system were included. Already one month after its installation, this system could be expanded into a complete system, and five months later, the more than 100 outstations TG80x and TG065 started operation in the monitoring mode. Barely 14 months after award of the contract, the new SCADA system for the production and distribution network started operation in February, 2005. Today, the system manages more than 30,000 process elements, exceeding the former system by more than 25%.
Communication via TASE.2
For grid operation on the 380- and 220kV voltage level, data from national and – on the European level – international grid partners are exchanged via TASE.2 protocol. Given the high importance of this network, two TASE gateways are installed to ensure smooth and trouble-free operation. Also, the connection to EOS’s in-house computer system is, in parts, realised via the TASE.2 interface.