Peter Leupp, Head of Power Systems, ABB Group, Namibia, 11 Nov 2011 HVDC power technology A key enabler for evolving trends

Transcription

1 Peter Leupp, Head of Power Systems, ABB Group, Namibia, 11 Nov 2011 HVDC power technology A key enabler for evolving trends

2 Challenge: more power with less environmental impact ABB offering across the power value chain Generate Connect and transmit Distribute and control Slide 2

3 Transmission technologies play a key role Connecting & transporting power efficiently and reliably Different technologies :Same power being transmitted Traditional overhead line with HVAC AC transmission : direction of current is constantly reversed back and forth. Power can be transformed easily to a higher or lower voltage by transformers DC transmission : based on direct flow of electric charge through a circuit - suited for point to point long distance bulk power transfer with minimum losses and allows better control of power flow Overhead HVAC line with FACTS HVDC Classic overhead line Underground line with HVDC Light or AC cable Slide 3

4 Why HVDC? A proven technology with distinct advantages HVDC enables bulk power transmission over longer distances higher efficiency / lower losses (~ 3% per 1000km based on voltage, construction...) higher transmission capacity and lower capital costs space saving benefits eg. aesthetics, rightof-way and urbanization advantages Applications : Large amounts of power transmission Integration of remote renewables & transmission to distant load centers (eg. large hydro, bulk solar, wind etc.) asynchronous interconnection of networks on different frequencies or which are incompatible instant and precise power flow control Grid interconnections to balance loads and facilitate power trading Stronger, smarter and more flexible grids Slide 4

5 HVDC Light Special features make it ideal for many evolving trends Applications Offshore wind power integration Cross border interconnections Power supply to islands Shore supply to offshore platforms City center in-feed Embedded DC in AC to strengthen AC network Suited for future DC grid applications Special features Use of extruded cables enables underground & subsea transmission Black start capability and connection to passive loads Controllability of HVDC Light enables enhancement of AC networks Independent control of active & reactive power Space saving - compact AC/DC converter stations Slide 5

6 ABB pioneered HVDC in 1950s Technology and innovation keeps us in the lead Transmission capacity (MW) 6,000 4,000 2,000 HVDC Classic Voltage Capacity Voltage kv Losses HVDC Light Capacity Losses % Capacity up 6 times since 2000; Voltage up from +/- 100kV to +/- 800kV since Capacity up 10 times; losses down from 3% to 1% per converter station since 2000 Slide Directlink, 354 km ± 80 kv, 60 MW 2001 Murraylink, 360 km ± 150 kv, 220 MW 2004 Estlink, 210 km ± 150 kv, 350 MW 2010 Dolwin, 165 km ± 320 kv, 800 MW

7 ABB s unique position in HVDC In-house converters, semiconductors, cables Key components for HVDC transmission systems Converters High power semiconductors HV Cables Conversion of AC to DC and vice versa Silicon based devices for power switching Transmit large amounts of power- u/ground & subsea

8 ABB and HVDC : many world firsts track record of a market leader

9 Power superhighways Example: Xiangjiaba-Shanghai, China Customer: SGCC Commissioned: 2010 >2,000 km Customer need Transmit clean hydro power >2,000 km from mountains to busy urban centers ABB response ± 800 kv UHVDC, 6,400 MW HVDC Classic transmission system with 93% efficiency (less than 7% losses) Customer benefits Meet growing demand for electricity Enabling use of clean renewable energy Savings vs AC line enough to supply power to more than 1 million Chinese Uses 40% less land & conventional technologies Delivered one year ahead of time World s first UHVDC link longest and highest power capacity Slide 9

10 Offshore wind connections Example: BorWin, Germany Customer: TenneT commissioned: 2009 Customer need Integrate offshore wind power generated in the North Sea into the German grid and transmit to consumers ABB response 400 MW HVDC Light system ;130 km sub sea and 70 km underground cable Grid stability and reliability ABB subsequently awarded Dolwin 1 and Dolwin 2 projects Customer benefits Reduce CO 2 emissions by ~1.5 mn tons per year by replacing fossil-fuel generation Supports wind power and renewable energy development in Germany Integrating the world s most remote offshore wind farm Slide 10

11 Cross border interconnections Example : NorNed (Norway and Netherlands) Customer:Statnett/TenneT Commissioned: 2008 Customer need Power sharing to optimize utilization of hydro and wind energy Length of sea cable & asynchronous AC systems urope: 20 HVDC interconnections built 7 under construction 10 in pipeline to be ordered >10 more in planning ABB response 700 MW HVDC system (< 3.7% losses) Length of subsea cables: 580 km Customer benefits Increased security of supply in both markets Balancing power needs Power trading Emissions reduced by 1.7 mn tons/year World s longest underwater power link

12 Power from shore Example : Troll A, Norway Customer:Statoil Commissioned : 2005 Troll A 1 2 Additional 100 MW extension order recently received Troll A 3 4 Customer need Enable power supply from mainland grid to offshore platform to replace need for generating own power ABB s response 2x40 MW ±60 kv HVDC Light offshore transmission system 70 km subsea cable Customer benefits Environmental benefits from reduction of CO2 emissions Efficient transmission across long distance and compactness of converter on platform World s first offshore platform connected to shore power

13 Underground power transmission Example : Murraylink, Australia Customer: TransEnergie Commissioned: 2002 Customer need Interconnect South Australia and Victoria to meet consumer needs and enable electricity trading in deregulated market ABB response Turnkey 220 MW ±150 kv HVDC Light transmission system with 180 km long underground cable Customer benefits Invisible - used existing underground corridors Location ideal to deliver power from South Australia, Victoria, NSW & the Snowy River generation to South Australia or Victoria The world s longest underground cable

14 Transmission of remote hydro power Example : North East Agra, India ± 800 kv UHVDC Customer need Transmission of 6,000 MW hydropower from the north-east of India to the Agra region over 1,700 km ABB response Turnkey 6,000 MW ±800 kv UHVDC Multi-terminal three converter stations Customer benefits Low losses ~6 per cent Highest rated converter capacity in the world (8,000 MW), providing redundancy for loss of one converter with retained transfer capacity World s first multi-terminal UHVDC link Slide 14

15 ABB has more than half of the145 HVDC projects The track record of a global leader Nelson River 2 CU-project Vancouver Island Pole 1 Rapid City Square Butte Pacific Intertie Pacific Intertie Upgrading Pacific Intertie Expansion Intermountain IPP Upgrade Blackwater Highgate 58 HVDC Classic Projects since HVDC upgrades since HVDC Light Projects since 1997 Châteauguay Outaouais Quebec- New England EWIC English Channel Dürnrohr Sardinia-Italy Sapei Cross Sound Eagle Pass Sharyland Rio Madeira Itaipu Inga-Shaba Caprivi Link Hällsjön Troll Skagerrak 1-3 Skagerrak 4 Valhall NorNed Konti-Skan Tjæreborg BorWin1 DolWin1, Dolwin 2 Apollo Upgrade Cahora Bassa Brazil-Argentina Interconnection I&II Italy-Greece Chandrapur Phadge Vizag II Rihand-Dadri Vindhyachal North East Agra FennoSkan 1&2 Estlink Gotland 1-3 Gotland Light NordBalt SwePol Baltic Cable Kontek Hülünbeir- Liaoning Lingbao II Extension Three Gorges-Changzhou Three Gorges-Shanghai Sakuma Gezhouba-Shanghai Xiangjiaba-Shanghai Jinping - Sunan Three Gorges-Guandong Leyte-Luzon Broken Hill New Zealand 1&2 Directlink Murraylink

16 Caprivi Link another world first!

17 HVDC Light goes overhead Caprivi link, Namibia, Southern Africa Customer: NamPower Commissioned 2010 Customer need Strengthen power security for Namibia Capable of integrating hydro power from Zambia and coal fired power from Zimbabwe Connect north west and central grids ABB response 350 kv 300 MW HVDC Light First with overhead lines km ±350 kv DC o/h line ; ~ 50 km electrode lines Option for another 2x300 MW bipole Customer benefits Stability to two very weak AC networks Voltage control, grid stability, reliability Black start of Caprivi region during outages Future power trading in southern Africa World s first HVDC Light on an overhead line

18 Caprivi Link, Namibia Rationale, challenges and many firsts Slide 18 Rationale Why transmission? generation more costly & uncertain Why HVDC? AC-alternative unrealistic Why HVDC Light? Most efficient ; lowest investment and evaluated cost including losses. Why overhead line? To minimize cost land available Challenges Location and terrain New innovation & technical complexities Cost pressures Many firsts First 350 kv HVDC Light project in the world First HVDC Light project in Africa First commercial HVDC Light on overhead lines First HVDC Light project configured as a bipole Enabling access to electricity bringing power to the people

19 Caprivi Link, Namibia Gerus HVDC converter station Slide 19

20 A look into the future-what next The evolution of DC grids

21 HVDC limitation today point to point power highways No entry or exit points a major deterrent From joining the dots to connecting the lines Slide 21

22 The way forward Europe 20XX Scenario ABB s DC grid vision conceived in 1999 Hydro power Solar power Wind power DC transmission Hydro 200 GW Wind 300 GW ; km x 10 km Solar 700 GW ; 8000 km 2 90 x 90 km Slide 22

23 The vision is now a shared vision Accelerated by the huge plans for renewable energy pepei.pennnet.com wind-energy-the-facts.org mainstreamrp.com Statnett wikipedia/desertec Desertec-australia.org Statnett claverton-energy.com Slide 23

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