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5. Jinsha River II – East China800 kV, 6400 MW, 2016
6. Jingping – East China800 kV, 7200 MW, 2012
7. Jinsha River II – East China800 kV, 6400 MW, 2019
8. Jinsha River II – Fujian800 kV, 6400 MW, 2018
9. Nuozhadu – Guangdong800 kV, 5000 MW, 2015
10. Jinghong – Thailand3000 MW, 2013
11. Yunnan – Guangdong800 kV, 5000 MW, 2009
12. Humeng – Liaoning800 kV, 6400 MW, 2018
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Page 4 25.10.2010 Dr. Mario Schenk, Frank Trautmann
HVDC is efficient for:- Overhead lines
(>1000MW, >600km)- Cable Links (about 50km,
for >80km or different frequenciesthe only technical solution)
Advantages of HVDC:- Low Line Cost, but Converter Cost- No capacitive charging currents -
less losses and CO2 emissions- Firewall function for grids- Load flow regulation (HVDC Plus)- Connection for different frequencies- High Transmission Power density
(usage of less land or space)- Offshore connections for
wind parksor oil rigs (substitution of CO2emissions from diesel generators)
AC DC
[$]
[miles]
HVDC line cost
AC line cost
cost benefit DC transmission
cost benefit AC transmission
IntroductionHVDC (High Voltage Direct Current) Transmission is more efficient for Long Distances (>600km) or Cable Links (>50km) than HVAC (HV Alternating Current)
Page 5 25.10.2010 Dr. Mario Schenk, Frank Trautmann
= HVDC ±800 kV
Very high power capacity (5,000 MW and higher) of a single system25% lower transmission cost compared to 500 kV HVDCSmaller footprint and lower overhead transmission line costs as only one bipole is needed
IntroductionHVDC at 800 kV for economical, long-distance electricity transfer
Page 6 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Introduction800 kV DC Overhead Line Towers
Page 7 25.10.2010 Dr. Mario Schenk, Frank Trautmann
DC±800 kV
DC±500 kV
AC765 kV
100 %
83 %64 %
Total transmission cost (5,000 MW over 1,400 km; 30 year lifetime)
Losses
Station costs
Line costs
IntroductionClear economical advantage of an ±800 kV HVDC solution
Page 8 25.10.2010 Dr. Mario Schenk, Frank Trautmann
System Design Comparison of schematics of 500 kV and 800 kV HVDC systems
500kV HVDC 800kV HVDC
-250 kV
-250 kV
+250 kV
+250 kV+500 kV
+200 kV
+200 kV
+200 kV
+200 kV
+800 kV
-200 kV
-200 kV
800 kVsingle phase
2 windingtransformer
-500 kV
single phase3 winding
transformers
single phase2 winding
transformersor
Page 9 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Oil 142 t 148.8 t - Insulationlevel 909 kV 912 kV 912 kV Line (HV) LI 1550 kV SI 1175 kV AC 680 kV Valve (LV)
AC (60min) 912 912 912 LI 1800 kV
SI Potential 1600 kV DC (2h) 1254 kV 1258 kV 1258 kV PR -/+/-
(90/90/45)min 969 kV 970 kV 970 kV
Page 35 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Transforming know-how into solutions.Siemens Transformers.
Thank you foryour attention !
Page 36 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Information about the Presenter
Mario SchenkDirector Engineering and R&D, Power Transformers Nuremberg
1991 Electriciantill 1997 Electrical Engineering (HV and High Current)
(Dipl.-Ing. TU Dresden and Virginia Tech)1997-2002 Doctorate, Scientific Assistant (Dr.-Ing. TU Dresden)
Thermal Design of High Voltage Equipment
2002 ABB Switzerland AGR&D, Design of Generator Circuit Breakers
11/2002-10/2007 SGB Regensburg (SGB/SMIT Group)Director R&D, Director Engineering
2004-2006 Executive MBA(Northwestern University Chicago, WHU Koblenz)
since 11/2007 Siemens AG, Power Transformers NurembergDirector Engineering and R&Dresponsible for R&D, Electrical DesignMechanical Design and Production Technology