IPCOMM delivered ipConv gateways to link the TDC control systems with the master stations.
The converter station Fraugde as well as Herslev are connected to the master stations by IEC 60870-5-104 protocol.
The communication between the gateways and the master stations is redundant.
External device data are transmitted via the gateway to the TDCs:
The RTU (Siemens AK 1703 ACP) delivers actual states of the AC high voltage switchgear which is attached to the HVDC station;
the CLPS - Cable Load Prediction System (ABB AC 800 PEC) delivers dynamic operating parameter of the high voltage cable.
The CLPS communicates with the gateway via the standardized Modbus protocol.
The TDCs are connected to the gateway with the proprietary protocol Simatic TDC.
The TDC data traffic runs over a separate redundant process LAN.
The gateway time is synchronized over the NTP protocol.
This IPCOMM solution is part of the HVDC system Storebælt, Denmark.
In May 2007 the Danish TSO, Energinet.dk, awarded the contract for the Storebælt HVDC converters to Siemens.
The Storebælt HVDC transmission system will connect the grid in Jutland/Funen (a part of the UCTE system) with the Zealand Grid which is a part of the NORDEL system.
It is a 600 MW HVDC interconnection across the Storebælt Strait, linking the 400 kV substations Fraugde near Odense on the island of Funen and Herslev near Kalundborg on the island
of Zealand. The HVDC system is designed as a monopole with metallic return. Approximately half of the 56 km DC cable route is a land cable. [...] Commercial operation of the interconnection is about to start in 2010.