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Succes story 1

Amsterdam gas and energy distribution

Alliander (formerly Nuon) is one of the biggest energy suppliers in the Netherlands with 2,5 million customers in the Netherlands and Belgium. They manufacture electrical energy (20TWh yearly, green and grey mixed) and distribute electrical energy and gas to a major part of the Dutch households and industry.

One of the divisions of Alliander is Liandon (formerly Nuon Tecno). This engineering and project management division is involved with the following project/application that is installed in Amsterdam.

Amsterdam has a large number of gas-substations. In these substations, Alliander can regulate the gas distribution network in the Dutch capital. But for the future they do not only want to regulate, but also monitor real-time energy usage, alarming and flow measurement. This way Alliander can deliver better services to their customers and reduce cost. For the remote telemetry unit Alliander has chosen a new RTU, the D05-MCU-IEC from Datawatt Telecontrol Systems that utilizes IEC 60870-5-104 by Ethernet as communication protocol. Using fiber-optic cabling for this Ethernet communications because of the Ethernet links will exceed the maximum of 100 ft, was much too expensive and nearly impossible to do in such a short time and crowded city. The solution was simple; make use of the existing cupper cabling which is already available by Alliander's own telecom and signaling cable. After some successful tests with the Westermo DDW-100 and their positive experiences with the Westermo modem family, Alliander made a choice to use the Westermo Ethernet Extender products says Mr. Rens Dekker, Senior Engineer BOS. Key specifications were the galvanic isolation, extended temperature and performance of the DSL-line. Tests have been done up to 17 km. Now Alliander uses a ring of DDW-221's to form a central, redundant ring. From this ring 140 point-to-point communication lines are used to connect the remote locations (gas substations) to the central ring. Each point-to-point link consists of two DDW-100's to extend the Ethernet link up to a maximum of 12 km. So in total Alliander will install 6 DDW-221's and 280 DDW-100's to upgrade this gas distribution system into a modern, SCADA controlled and monitored communication system.