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Copyright © Siemens AG 2006. All rights reserved.© Siemens AG 2010Energy Sector
Siemens Transformers Power Transformers Nuremberg
HVDC Transformer Technology for Voltages ≥ 800 kVRecent Projects and Future Trends
Dr. Mario SchenkFrank Trautmann
Transformer Factory Nuremberg, Germany
Page 2 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Agenda
Introduction
System and Transformer Design – 800 kV HVDC
Projects, Developments and Trends
Dielectric Stress and Insulation Design
Page 3 25.10.2010 Dr. Mario Schenk, Frank Trautmann
IntroductionChina Project Overview
13. Humeng – Tianjiang800 kV, 6400 MW, 2016
14. Hulunbeir – Shenyang3000 MW, 2009
15. BtB NE-North (Gaoling)1500 MW, 2007
16. Humeng – Jinan (Shandong)800 kV, 6300 MW, 2015
17. North Shaanxi – Shandong3000 MW, 2011
18. BtB Shandong – East1200 MW, 2011
19. BtB North – Central1000 MW, 2012
20. Goupitan – Guangdong3000 MW, 2016
21. Ningxia – Tianjing3000 MW, 2010
22. NW – Sichuan3000 MW, 2010
23. Irkutsk (Russia) – Beijing800 kV, 6400 MW, 2015
Xinjiang
Qinghai
Xizang
GansuInrfar Mongolia
Heilongjiang
Jilin
Liaoning
Hebei
Shanxi
Shaanxi
Ningxia
Sichuan &Chongqing
Yunnan
Hainan
Guangxi
Guizhou
Hunan
Hubai
Henan
Guangdong
Fujian
JiangxiZheijang
Shandong
Beijing
Tianjin
JiangsuAnhuj
Bangkok
Taiwan
1. Hami – C. China800 kV, 6400 MW, 2018
2. Xijaba – Shanghai800 kV, 6400 MW, 2011
3. Xiluodu – Hanzhou800 kV, 6400 MW, 2015
4. Xiluodu – Hunan800 kV, 6300 MW, 2013
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
1
2
34 5
67
82011
9
10
22
21
23 12
13 14
1615
1617
19 18
Shanghai
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
BIL / SIL: 1900 kV / 1600 kVBIL / SIL: 1800 kV / 1600 kV
BIL / SIL: 450 kV / 325 kV
BIL / SIL: 1175 kV / 950 kV
BIL / SIL: 1300 kV / 1050 kV
BIL / SIL: 950 kV / 750 kV
BIL / SIL: 1550 kV / 1300 kV
System Design Insulation Coordination - Insulation Levels
Page 10 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Receiving StationYunnan - Guangdong
- 800 kV DC- 800 kV DC
+ 800 kV DC+ 800 kV DC
+ 400 kV DC+ 400 kV DC
- 400 kV DC- 400 kV DC
Page 11 25.10.2010 Dr. Mario Schenk, Frank Trautmann
2.1
2.2
1.1
1.3
Val
veW
indi
ng
HV
Win
ding
Tap
Ret
urn
limb
/ win
dow
Upper Yoke
Lower Yoke
Cor
e
2.1
2.2
1.1
1.3
Tap
HV
Win
ding
Val
veW
indi
ng
Ret
urn
limb
/ win
dow
Upper Yoke
Lower Yoke
Cor
e
Valve Winding inside Valve Winding outside
Insulating system is to design only
for AC
Insulating system is to design both for AC and DC
Insulating system is to design both for AC and DC
Insulating system is to design only
for AC
Transformer Design Typical Winding Arrangements
Page 12 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Dielectric Stress and Insulation Design Dielectric Tests (Test Voltages) for AC Transformers
AC Voltage Switching Impulse
0 10 20 30 ms 50-1.0
-0.5
0
0.5
1.0
Zeit t
Spa
nnun
g U(t)/Û0
0 1 2 3 4 5 6 µs 80
0.2
0.4
0.6
0.8
1.0
Zeit t
Spa
nnun
g U(t)/Û0
0 10 20 30 40 50 60 µs 800
0.2
0.4
0.6
0.8
1.0
Zeit t
Spa
nnun
g U(t)/Û0
0 0.5 1.0 1.5 2.0 2.5 3.0 ms 4.00
0.2
0.4
0.6
0.8
1.0
Zeit t
Spa
nnun
g U(t)/Û0
Lightning Impulse (Full Wave) Lightning Impulse (Chopped Wave)
volta
ge
time
volta
ge
time
volta
ge
time
volta
ge
time
Page 13 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Long Time AC / DC Voltage Test
Applied DC voltage duration 2 h,positive polarity,PD-measurement
Applied AC voltage duration 1 h, PD-measurement
Polarity Reversal (PR) Test according to the IEC standard
Usual cycle: 90min(-) PR 90min(+) PR 45 min(-) Applied DC voltage duration 90 min,
negative polarity First PR within 1min…2min
90 min positive polarity Second PR within 1min..2min
45 min negative polarity
PD-measurement
Dielectric Stress and Insulation Design Special Dielectric Tests for Valve Windings
0 40 90 135 min 225-1.0
-0.5
0
0.5
1.0
time t
volta
ge U(t)/Û0
0 30 60 min 1200
0.2
0.4
0.6
0.8
1.0
time t
volta
ge U(t)/Û0
Page 14 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Equipotential Lines for an AC Field
Dominant for the field distribution: Electrostatic displacement field
ED r 0
Equipotential Lines for a DC Field
Dominant for the field distribution: Stationary Flow Field
EJ
Dielectric Stress and Insulation Design Equipotential Lines for AC and DC electric field
Permittivitypressboard / oil r ratio = 2
Conductivitypressboard / oil ratio > 50
Page 15 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Dielectric Stress and Insulation Design Parameter which influence the Oil Conductivity
1 0 -11
1 0 -14
1 0 -13
1 0 -15
1 0 -12
1 10 0 1 0 100 0
P re s sb o a rd , H
P re s s bo a rd , T
Ö l
F elds tä rke [k V/m m ]
Leitf
ähig
keit
[S
m-1
]
20 40 120 60 80 100
10-12
10-15
10-18
10-9
Porzellan
Öl
Pressboard
RIP
Temperatur [°C] Le
itfäh
igke
it [
S m
-1]
Quelle: „DC Flashover voltage characeteristics...“,A. Kurita et.al, IEEE Transactions on Power Delivery,Vol. PWRD-1,No.3, July
10 -1 1
10 -1 4
10 -1 3
10 -1 5
10 -1 2
1 10010 1000
Pres sboard , H
P ressboard , T
O il
Field S tre ngth [k V /m m ]
Con
duct
ivity
[S
m-1
]
20 40 120 60 80 100
10-10
10-13
10-16
10-7
Porcelain
Oil
Pressboard
RIP
Temperature [°C] C
ondu
ctiv
ity
[S m
-1]
Page 16 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Equipotential Lines Electrical Field Distribution
Applied Voltage
Dielectric Stress and Insulation DesignPolarity Reversal (PR) Change of the Field Strength during and after PR
max 1.00
Emag in kV/mm
Page 17 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Projects, Developments and TrendsLong time DC or DC polarity reversal test with PD measurement – Test setup800kV HVDC Transformer
Page 18 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Projects, Developments and TrendsActive Part and Leads Assembly – 800kV HVDC Transformer
Page 19 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Projects, Developments and TrendsBarrier System for the 800 kV Bushing of the Valve-Winding
Page 20 25.10.2010 Dr. Mario Schenk, Frank Trautmann
5,000 MW1,418 km
+/- 800 kV DC
Commercial Operation: 2009 – Pole 1 2010 – Pole 2
Yunnan-Guangdong
Projects, Developments and TrendsThe World’s first 800 kV UHV DC in China Southern Power Grid
Quelle: Prof, Retzmann
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Projects, Developments and TrendsSending Station Chuxiong
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Projects, Developments and TrendsConverter Transformer at Suidong
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Projects, Developments and TrendsUHV DC Transformers arriving
Page 24 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Projects, Developments and TrendsUHV DC Transformers arriving
Page 25 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Projects, Developments and TrendsUHV DC logistics – a crucial task
Page 26 25.10.2010 Dr. Mario Schenk, Frank Trautmann
800 kV DC800 kV DC800 kV DC800 kV DC
2 x 400 kV DC2 x 400 kV DC
Projects, Developments and TrendsYunnan-Guangdong – UHV DC Valve Halls
Page 27 25.10.2010 Dr. Mario Schenk, Frank Trautmann
800 kV DC
Projects, Developments and TrendsYunnan-Guangdong – UHV DC Valve Hall
Page 28 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Yunnan-Guangdong – UHV DC Converter
400 kV DC
Page 29 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Yunnan-Guangdong – UHV DC Converter
29 02-2010 Power Transmission DivisionE T PS SL/Re800 kV DC
Inauguration first pole on 28.12.2009
Page 30 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Yunnan-Guangdong –UHV DC Converter
800 kV DC
Page 31 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Xiluodu-Zhexi 1728km
Zhexi
Xiluodu rightXiluodu right
Nanhui
XiangjiabaXiangjiaba
Sichuan Power Grid
Xiluodu-Zhuzhou 970kmZhuzhou
Xiluodu leftXiluoduleft
Wuhan
Guangdong
LeshanChongqing
Changsha
Shanghai
6,400 MW+/- 800 kV DC
2,071 Km
Xiangjiaba-Shanghai
Projects, Developments and TrendsWorld’s biggest and longest 800 kV UHV DC Transmission ProjectState Grid Corporation of China
Quelle: Prof, Retzmann, Siemens
Page 32 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Projects, Developments and TrendsHVDC Transformers
3000 MW, 500KV 5000 MW, 800kV 6400 MW, 800kV 7200 MW, 800kVXiangjiaba-Shanghai
321,1 MVA2009
Yunnan-Guangdong250 MVA
2008
Study360 MVA
2010
TSQ-GBJ
2000
in operation in operation in operation Study
Page 33 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Sunan
To Sichuan Power GridJinping Plant I
GuandiLinping
Jinping Plant I I
Xichang
Wuhan
Guangdong
LeshanChongqing
Changsha
Shanghai
Source: “Brazil-India-China Summit Meeting on HVDC & Hybrid Systems –Planning and Engineering Issues”, July 2006, Rio de Janeiro, Brazil
* 7,200 MW+/- 800 kV DC
Planned for 2013
* 6.4 GW initially
2,237 km
+/- 800 kV DC
For Comparison: Germany 840 km
Projects, Developments and TrendsJinping ± 800 kV UHV DC Transmission Project
Page 34 25.10.2010 Dr. Mario Schenk, Frank Trautmann
Projects, Developments and TrendsHVDC Transformers – Technical Data
1. 800 kV Yunnan
Guangdong
2. 800 kV Xiangjiaba Shanghai
3. 800 kV Study
1. 1100 kV Study
Rated Power System 5000 MW 6400 MW 7200 MW
Transformer 250 MVA 321 MVA 360 MVA Vectorgroup li0 li0 li0 Ratio 525 kV/√3
168.85 kV/√3 530 kV/√3
170.3 kV/√3 530 kV/√3 170.3 kV/√3 ?
Weights Total 512 t 551.8 t -
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