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Download: Hydro Tasmania Uses Matrikon OPC Tunnelling Technology to Overcome DCOM Issues When Connecting to Allen-Bradley PLCs and RSLinx

"Matrikon OPC Tunneller was literally Plug and Play. Once we installed it and followed the simple configuration instructions, we haven't had to touch it. Since it was installed, Matrikon OPC Tunneller has been pretty much transparent."
Simon van der Aa, Control Systems Engineer with Hydro Tasmania Consulting

King Island is located in Bass Strait, between Tasmania and Victoria in the Southeast of Australia. As part of the KIREX Renewable Energy Expansion project, Hydro Tasmania installed two Vestas wind turbines to complement the existing wind/diesel power station, using the services of Vestas (turbine supplier) and Hydro Tasmania Consulting (designer). The power station is load controlled and is fully automatic. It is controlled by an Allen Bradley PLC control system, with an RSView operator interface. Part of the installation of the new wind turbines was Vestas' proprietary control system, Vestas Online. This package allows remote control of small and large wind farms from a central control point, with control, monitoring and historical functions. Internally, all communications between the Vestas Server and the turbines is performed using OPC. RSLinx has the capacity to act as an RSLinx OPC server, so OPC was chosen as the link between the Vestas Server and the Station Controller.

Although the two networks were physically connected, it was not possible to logically link the two systems due to domain and DCOM issues. After some good experiences with MatrikonOPC Explorer, an OPC client utility, during early commissioning of the Vestas network, Hydro Tasmania Consulting chose Matrikon OPC Tunneller to provide the bridge between the two networks. Tunneller provides an easy, reliable and effective way to communicate across different network domains and does away with the headaches typically associated with the configuration of DCOM. The implementation of this software was carried out painlessly, and any technical problems were quickly overcome with technical assistance from Matrikon Australia.

"Matrikon OPC Tunneller was literally Plug and Play," says Simon van der Aa, Control Systems Engineer with Hydro Tasmania Consulting. "Once we installed it and followed the simple configuration instructions, we haven't had to touch it. Since it was installed, Matrikon OPC Tunneller has been pretty much transparent."

Via this OPC connection, the Station Controller can control the wind turbines, allowing them to be integrated seamlessly into the overall station control philosophy. The station is capable of running unmanned, and schedules and loads the generators according to customer loading and wind conditions. The Station Controller can also log many parameters of the station and wind turbine operation, allowing the operators to quickly locate and troubleshoot faults that may occur. Approximately 20 parameters are transferred between the two systems every second.

Hydro Tasmania Consulting provides engineering, scientific and associated services to national and international customers. Clients of Hydro Tasmania Consulting include environmental, electricity, water and other utilities throughout the world, all levels of government in Australia and overseas, project developers, mining companies and multilateral lending agencies such as the World Bank, Asian Development Bank, AusAID and United Nations agencies.

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