In the meantime, in the electricity area, all 18 substations and 4 switching stations have been equipped with net-line FW-40 and net-line FW-50 stations. The range extends from simple systems with information transmission and command control, through secured output via DSO-2 cards, to complex solutions with up to 7 cascaded net-line FW-50 stations and FW-5000 telecontrol interfaces for connecting protective equipment using protocol IEC 60870-5-103.
In large 110 kV substations, ProCoS substation automation technology is used as an "on-site control system" in addition to the coupling of protective equipment.

The connection to the IDS High-Leit X control centre in Kiel Hassee is made by means of both VFT modem lines and V.24 interfaces, which use glass fibre lines via star couplers/media converters. In this case the protocol is IEC 60870-5-101 with 1.2 kbaud or 38.4 kbaud.

The renewable energy plants with an electric feed-in power of 250 kW or greater are power-controlled in accordance with the German Renewable Energies Act (EEG) § 6. These are cogeneration plants, hydroelectric plants, wind power plants and solar plants. Currently 7 plants are equipped with net-line FW-5 stations, which realise the power stages 100/60/30/0% by means of persistent commands from the control centre. The feed-in power is detected as a measured value and transmitted online to the control centre.
This connection is made via GPRS links with a VPN tunnel using protocol IEC 60870-5-104.

In the gas area, information, measured values and metered values are transmitted from 4 heating plants using net-line FW-5 stations with VFT modem lines. In the EGÜ Gaarden central natural gas transfer station, operating data of the feed-in control system are also transmitted to a net-line FW-50 station using Profibus DP and Modbus TCP protocols.
This connection is also made by means of VFT technology using protocol IEC 60870-5-101.

In the water area, tank installations and pressure booster systems are equipped with 3 net-line FW-5 stations. In these stations a Modbus TCP link is realised in addition to the discrete process data link.



Stadtwerke Kiel AG


Uhlenkrog 32, 24113 Kiel


From 2001 to the present


net-line FW-40, net-line FW-5, net-line FW-50, net-line FW-5000


IEC 60870-5-101, IEC 60870-5-103, IEC 60870-5-104, Modbus-TCP, Profibus-DP