THE NORNED HVDC CABLE LINK A POWER TRANSMISSION HIGHWAY BETWEEN NORWAY AND THE NETHERLANDS Jan-Erik Skog1 Kees Koreman2 Bo Pääjärvi3 Thomas Worzyk4 Thomas Andersröd5
[email protected], Statnett, N-0302 Oslo Norway
[email protected], TenneT, NL-6800 AS Arnhem, The Netherlands
[email protected], ABB Power Technologies, SE-77180 Ludvika, Sweden
[email protected], ABB Power Technologies, SE-37123 Karlskrona, Sweden
[email protected], Nexans, N-0509 Oslo, Norway ABSTRACT Otherwise is injected into the DC cables. The The NorNed HVDC Cable Link is under midpoint in Feda is isolated from earth with an construction. The transmission connects the hydro- arrester to protect the midpoint from over-voltages. power based Norwegian grid with fossil fuelled ac To optimize the rating of the over-voltage system in The Netherlands. The 700 MW, 580 km protection in the midpoints a RC damping circuit is long link will be the longest cable transmission in installed in both midpoints. the world and will be in commercial operation The configuration is shown in Figure 1. towards the end of 2007. 1. INTRODUCTION +450 kV DC-cable This paper describes the novel technology used in both converter stations and in the submarine cable Feda system especially suitable for an extremely long Eemshaven -450 kV cable HVDC connection. The flexibility and speed in controlling the level and direction of the power flow gives a number of benefits like increased security of electricity supply, improved utilization of the power plants, reduced CO2 emissions and assistance in further development of renewable wind power.