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Power Electronics for a sustainable and secure Energy Supply

Power Electronics for a sustainable and secure Energy Supply. Michael Weinhold Technology and Innovation Siemens AG, Energy Sector. Challenges and Solutions for the energy system. High efficient fossil power plants. Need for more energy.

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Power Electronics for a sustainable and secure Energy Supply

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  1. Power Electronics for a sustainable and secure Energy Supply Michael Weinhold Technology and Innovation Siemens AG, Energy Sector

  2. Challenges and Solutions for the energy system High efficient fossil power plants Need for more energy Increased use of renewable and distributed energy resources. Urbanization Bulk power transmission over longdistances Scarcity of natural resources Distribution within congested areas / mega cities. Climate Change Open markets Goal: efficient, reliable, flexible, safe and secure energy supply infrastructure

  3. Future grids require more flexibility Increased energy trading Integration of distributed energy resources Increasing distance between generation and load Increasing short-circuit currents High supply quality along with greater network complexity and vulnerability Fluctuating infeed Cost pressure Aging infrastructure and lack of experts Legal & regulatory framework Drivers for flexible and (cost)-efficient grids

  4. Tariff Tariff Advanced Power Transmission Solutions with HVDC (High Voltage Direct Current Transmission) and FACTS (Flexible AC Transmissions Systems) North System50 Hz Central System60 Hz Power Exchange – Asynchronous Networks ~ Avoidance of Loop Flows voltage control Submarine Cable Link Clean & Low Cost Energy Bulk Power & Long Distance Submarine Cable Link Power Exchange ~ South System60 Hz Symbols: DC Transmission & Interconnection Series compensation Parallel compensation

  5. Series Compensator for AC Line in Brasil (1997) Thyristor Controlled Series Compensation (TCSC)in Serra da Mesa- Increase of Power Transfer Capacity to 1300MW- Stabilisation of Transmission Grid (up to 500 POD/day)- Power Rating 107MVAr - Transmission Voltage 550kV

  6. Components and principle technologies of High Voltage Direct Current Transmission (HVDC) DC ~ = = ~ AC Grid 1 AC Grid 2 C C G G A E

  7. AC AC System 1 DC line System 2 AC AC DC cable System 1 System 2 AC AC System 1 System 2 Siemens HVDC TechnologyHVDC Applications Long Distance DC Cable Back-to-Back

  8. Pole 1 Pole 2 Transmission Line Terminal A Terminal B Siemens HVDC TechnologyHVDC Long Distance Transmission Systems Monopolar Transmission Line Terminal A Terminal B Bipolar

  9. Right of way comparison

  10. Neptune, USA, 2007 Customer: Neptune RTS Project name: Neptune Location: New York/ New Jersey Long Island Type of Plant: Long Distance Sea Cable Power Rating: 660 MW, monopolar Trans. distance: 105 km Sea Cable + 23 km Land Cable Voltage levels: 500 kV DC 230/345 kV, 60Hz Thyristor voltage: 8 kV (LTT) Manhattan JFK “Black out prevention for mega cities”

  11. The Trans Bay Cable project with HVDC PLUS • Little room for the power converter stations • High seismic requirements • Complex interaction with the AC grid (low harmonics, existing SVC etc.) • New self-commutating HVDC PLUS topology • ± 200kV, 400MW capacity • 90km of extruded XLPE marine cable

  12. Moyle Interconnector, Northern Ireland, 2001 Customer: Moyle Interconnector Ltd. Project name: Moyle Interconnector Location: Northen Ireland – Scotland Type of plant: Long-distance transmission submarine cable Power rating: 2 x 250 MW Trans. distance: 64 km Voltage levels: 2 x 250 kV DC 275 kV, 50 Hz Type of thyristor: Direct-light triggered 8 Kv Nos. of thyristors: 1872

  13. Spain-Mallorca DC Interconnerctor • Customer: Red Eléctrica de España • 400 MW, 250 kV8 kV LTT250 km sea-cable • 52% Reduction in CO2 by using energy mix from mainland instead of building an oil-fired power plant on the island • Operation scheduled for May 2011 • Order volume 100´€ Enabled CO2 abatement: 1.200.000 t/a

  14. Example for reduced transmission losses:2500MW HVDC to Dehli • 500kV / 2500MW HVDC Transmission • ca. 40% lower losses compared to the locally typical 400kV AC transmission CO2 abatement: 688.000 t/a

  15. Basslink HVDC Interconnector, 2005 Customer: Basslink PTY Ltd. (NGT Int. Ltd.) Location: Tasmania-Victoria Supplier: Tas-Vic Interconnector Consortium Siemens / Pirelli Type of Plant: Long Distance Sea Cable / OHL Power rating: 500 MW monopolar Trans. distance: 286 km DC cable 70 km OHL “Green Energy for Australia”

  16. Guizhou - Guangdong, China, 2004 Customer: State Power South Company Project name: Guizhou - Guangdong Location: Guizhou Province and Guangzhou near Hongkong Type of plant: Long-distance transmission Power rating: 3000 MW, bipolar Trans. distance: 980 km Voltage levels: ± 500 kV DC, 525 kV Type of thyristor: 8 kV (LTT) Nos. of thyristors: 3744

  17. Example of Connecting renewable Energies:Hydro Power in China via High Voltage Direct Current Transmission (HVDC) • Only HVDC allows transfer of Hydro Power from Yunnan into the Hong-Kong area. • HVDC with highest-ever rating of 5000 MW over distance of1400 km. • First ever 800kV HVDC. • Order received 6/2007 from China Southern Power Grid Avoiding emmission of 30 Mt CO2 per year

  18. For China 500kV is not enough:800kV UHV DC 800kV DC transformer bushing at the test lab of TU Graz

  19. World’s longest HVDC Cable in Operation World’s 1stHVDC with Transmission Voltage of 800 kV ! Siemens HVDC experience 2010 Trans Bay Cable 1993 1983 2001 2007 Etzenricht Dürnrohr 2010 Moyle Neptune 1977/2004 1993 Storebælt Nelson River Wien Südost 1984 2010 1989 Poste Châte. Bridnet Ge-Nan 1997/2004 2011 2004 Celilo Spain-Mallorca GuG I 2009 1995 2007 Ballia-Bhiwadi Sylmar East GuG II 1987 2003/2007 2000 Virginia Smith ESI TSQ TSQ 2005 2001 2009/2010 Thailand-Malaysia Lamar 1981 Yunnan-Guangdong 1977/1998 1995 2005 Acaray Welsh Cahora Bassa Basslink Status: 01-2008 Power Transmission and Distribution

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