The SCADA system monitors the Storebælt’s tunnel and road section. It gathers data and monitors all technical systems on the Storebælt fixed link and some systems can also be controlled via the new SCADA system. The system is a crucial component of the Storebælt fixed link where standards need to be as high as possible in order to safeguard transport links between East and West Denmark.
The range of technical systems that ”talk to” SCADA is extensive and include systems that check and monitor air quality and the ventilation in the tunnel, lighting on the railway and road section and the power supply systems.
”We have a system that constantly monitors gases in the tunnel and if a train stops, ventilation automatically kicks in after a couple of minutes. In the same way, we measure whether there is any water on the tracks, on the ramps and in the deepest part of the tunnel. If there is, the pumps start automatically,” explains Kim Lindholt, SCADA system administrator and responsible for the SCADA replacement.
Overall, the SCADA system is in constant communication with around 14,500 signals, which safeguarads the safety of drivers across the Storebælt Bridge and rail passengers under the Storebælt waterway.
The old SCADA system, which will soon become obsolete, has been in operation since the Storebælt rail line opened in 1997. It is based on outdated technology, which has made it increasingly difficult to procure parts. The decision was made, therefore, to replace the entire SCADA system and after several years of design and testing in collaboration with Sund & Bælt’s advisers, Rambøll and Siemens, the supplier of the sytem, the process is now at an end.
”The SCADA system is a crucial part of the link as it is from here that we can see everything that’s going on, down to the smallest detail. It’s important to ensure that traffic runs smoothly between the regions of Denmark,” says Kim Lindholt.
New fibre network
The new system comprises 77 sub-stations, which gather data from the technical installations around the link, two main stations where data is logged and gathered and 13 work stations where employees can monitor and control the systems remotely. As well as the Storebælt link itself, there are work stations at Korsør station, at Southern Zealand and Lolland-Falster police at Næstved, Banedanmark in Roskilde and the VTS centre in Korsør.
The SCADA system is built up from standard components and in tandem, a completely new optical fibre network with related data transmission equipment has been established, which is responsible for communication between the different stations.
Since mid-December, the system has been operating according to a so-called verification period. This will last five months and will show whether the system is stable and meets the requirements set. Once the period is completed in May, and provided there are no surprises, all that remains will be to dismantle the old system and decommission it.