500 kV Stacagrach Light 4 HVDC link to Norway and Denmark's Jutland to boost access to more renewable energy
Zurich, Switzerland, January 19, 2015 - ABB, the world's leading power and automation technology group, successfully delivered a High Voltage Direct Current Transmission (HVDC) line between Norway and Denmark to enhance the region's renewable energy sources such as hydropower and electricity The proportion of wind power.
A voltage source converter (VSC) is used on the SC-4 transmission line at 500 kV and creates a new record in transmission voltage. These converters rely on semiconductor switching currents to convert high-voltage alternating current to direct current or vice versa with compact design and high controllability.
The use of VSC lines is increasingly being applied to subsurface and seabed, for example, access to renewable energy sources from land and offshore wind farms, land to island and offshore oil and gas platforms and urban power and trans-boundary interconnections.
This compact HVDC line strengthens the grid systems operated by Norway's transmission system operator Statnett and Denmark's Energinet.dk and helps to balance the load between the Norwegian hydroelectric system and the Danish wind and thermal power plants.
Fang Qin, ABB Group's Power Systems Business Leader, said: "ABB has pioneered the development of HVDC technology and continues to innovate.We have a unique advantage in the industry to produce all of our critical HVDC components, including power semiconductors, inverters, Converter transformers and high voltage cables. "
Currently, ABB has delivered all four lines of the Skagrac Strait Transmission System including the Skagluk Route 1 and 2 delivered in the 1970s, the Skagluck Route 3 delivered in 1993, And the delivery of the line. The transmission system across the North Sea Skager Strait, about 240 km long, transmission capacity of 1700 MW.
Based on the HVDC technology, ABB provided two 700 MW VSC stations for the Skagerrak Strait 4 line. This new route operates in a bipolar mode with the Skagerrak Strait Route 3, which uses the classic current-source-type HVDC (LCC-HVDC) technology.
This is the first time that two DC transmission technologies have been connected in this bipolar manner. ABB's advanced MACH control system is used to convert between these two technologies to achieve variable-current control.
The future, 500 kilovolts VSC will create more applications, especially with ABB's last year released a new type of extrusion HVDC 525 kV cable system for use. This new world record cable system enables the transmission current to be doubled and greatly extends its transmission distance, making it possible for more renewable energy power generation networks, demonstrating ABB's leadership in the development and application of HVDC technology.
ABB started HVDC 60 years ago and has been involved in about 100 HVDC projects with a total installed capacity of more than 120,000 megawatts, accounting for about half of global installed capacity. In the 90s of last century, ABB further promoted the development of HVDC transmission technology and developed HVDC Light transmission technology.
ABB's HVDC technology leads the development of voltage source commutation technology. With the delivery of the Skagerrak 4, ABB has constructed 15 of the world's 16 light-duty HVDC transmission projects.