Super Grids with UHV DC – Challenges and Solutions for ... · Super Grids with UHV DC – Challenges and Solutions for Bulk Power Transmission 2011. 2 08-2011 E T PS S/Re Power

1 08-2011 Power Transmission SolutionsE T PS S/Re1 08-2011 E T PS S/Re

Volker Hild Dietmar Retzmann

Power Transmission Solutions

Super Grids with UHV DC – Challenges and Solutions for Bulk Power Transmission

2011

2 08-2011 Power Transmission SolutionsE T PS S/Re2 Power Transmission SolutionsE T PS S/Re08-2011

CO2 Reduction – Green EnergyMegacities – Security of Supply

ocus on

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Prospects of Grid Developments:

08-2011

“Micro Grid” “Smart Grid”

Generation

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Virtual Power Plant

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“Super Grid”

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Bulk Power AC/DCEnergy HighwayE T PS S/Re3 E T PS S/Re08-2011

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GG + =SS CCLL+Storage

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SSLSmart, controlled Loads

(autonomous)

AC

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S System Interconnection

4 Power Transmission SolutionsE T PS S/Re

olutions for

08-2011

Grid Extension and

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2010

P = 400 MWQ = +/- 170-300 MVAr Dynamic Voltage Support

Elimination of Transmission Bottlenecks

~=

=~

==

~ == ~ ==

Transmission Constraints before TBC

Transmission Constraints after TBC

No Increase inShort-Circuit Power

Power Exchangeby Sea Cable

No Increase inShort-Circuit PowerNo Increase inShort-Circuit Power

Power Exchangeby Sea CablePower Exchangeby Sea Cable

HVDC PLUS: Trans Bay Cable Project, USASecurity of Supply for San Francisco Area


HVDC PLUS: Trans Bay Cable Project, USA


Energy Project of the Year – American Society of Civil Engineers, Region 9; Sacramento, 9th March 2011Energy Project of the Year – American Society of Civil Engineers, Region 9; Sacramento, 9th March 2011



Benefits of HVDC – in Eastern and Western-Europe …

Customer:RTE and REE

Sharing ofReserve Capacity

Power Exchange &

Customer:Energotrans Ltd.

System Data:Rating 2 x 350 MWVoltage 96 kV DCThyristor 8 kV LTT

Black Sea B2B 2013

2013

INELFE

World’s 1st VSC HVDCwith 2 x 1,000 MW –each @ VDC = +/- 320 kVCable: XLPE, 65 km

Increase in Stability


… and in USA: HVDC B2B close to New York

Customer:Hudson Transmission Partners LLC.

.System Data:Rating 660 MWVoltage 170 kV DCThyristor 8 kV LTT

2013

Hudson Transmission ProjectRidgefield (New Jersey), USA


Sharing ofReserve Capacity

Power Exchange &

Increase in Stability


From West to East – Benefits of HVDC

Bangladesh B2B

Customer:AltaLinkSystem Data:Rating 1,000 MWVoltage 500 kV DCThyristor 8 kV LTTOHL 400 km

WATL – Western AlbertaTransmission Link

2013Customer:Power Grid Company of Bangladesh Ltd.

System Data:Rating 500 MWVoltage 158 kV DCThyristor 8 kV LTT

Customer:ATCOSystem Data:Rating 1,000 MWVoltage 500 kV DCThyristor 8 kV LTTOHL 500 km

Sunnybrook

Crossings

Heathfield

Newell

2014 East DC Link Project

2014

10 08-2011 Power Transmission SolutionsE T PS S/Re10 Power Transmission SolutionsE T PS S/Re

Yunnan-Guangdong

08-2011

World’s first 800 kV HVDC – 5,000 MW

More Powerout of the Grid …

plus CO2 Reduction

In China Southern Power Grid


2 x 800 kV UHV DC in China Southern Power Grid

+/- 800 kV DC

World’s first 800 kV Bulk Power UHV DC Transmission SystemYunnan-Guangdong5,000 MW 1,418 km

Commercial OperationYunnan-Guangdong: Dec. 2009 – Pole 1 June 2010 – Pole 2

Reduction in CO2 versus local Power Supply with Energy Mix

2 x 33 m tons p.a. – by using Hydro Power and HVDC for Transmission

Return to Sustainability

Nuozhadu-Guangdong1,451 km5,000 MW 2013: +/- 800 kV

2012: +/- 400 kV

2 x +/- 800 kV DC

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Single-Line Diagram of Yunnan-Guangdong HVDC System


Yunnan-Guangdong – from ‘3D Models’ …


World’s first 800 kV UHV DC – 5,000 MW

2009/2010

… to Reality: Sending Station Chuxiong

14 Power Transmission Solutions08-2011 E T PS S/Re

Example of HVDC “Bulk”


Thorough Testing is essential …

15 Power Transmission SolutionsE T PS S/Re08-2011

TU Graz

FGH MannheimHSP Cologne

TU Munich

TU Dresden

PSW Berlin

IPH Berlin

KIT Karlsruhe


Examples of UHV DC Bushing, DC Arrestor and Voltage Divider

16 08-2011 Power Transmission SolutionsE T PS S/Re16 08-2011 E T PS S/Re

800 kV DC

9 m

12.8 m

Power Transmission Solutions

10.6 m


DC (2 hrs) 1,175 kVAC (1 min) 1,020 kVPR (90/90/45 min) 935 kVSI 1,790 kVLI (FW/CW) 2,080/2,320 kV

48** Transformers – for the Yunnan-Guangdong UHV DC Project

Test Voltages

** plus 8 Spare Units

800 kV HVDC Transformers under Construction250/244 MVA Single-Phase* Transformers

* for Transportation Reasons

Core Design: 3 Limbs & 2 Return LimbsL x W x H: 26 x 6.4 x 15.2 mTotal Weight: 512 tons


Yunnan-Guangdong – HVDC Transformer Data


A long Way: Transportation of Transformers –from Germany, Transformer Factory, to China


UHV DC Transformers: welcome to the City



UHV DC Substation – coming closer



Yunnan-Guangdong: UHV DC – ‘Welcome’



UHV DC Transformers – ready to ‘enter’the Valve Hall



Yunnan-Guangdong – UHV DC Valve Hall

800 kV DC

AC Side


Yunnan-Guangdong – UHV DC Valve Hall


800 kV DC

DC Side


UHV DC – Sending Station: from indoor to outdoor

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800 kV DC


Top View: Transformer Bushings & Valve Towers


800 kV DC


Yunnan-Guangdong – 800 kV DC Line



800 kV DC Overhead Line

Welcome great Outdoors !



Yunnan-Guangdong: UHV DC – Inauguration Pole 2World‘s highest bipolar DC Power * ever trans-mitted – with 4 Valve Groups, 2010, June 18

* 4,000 MW

* More Hydro Powerwas not available …at that Time


Yunnan-Guangdong: full Power Transfer 5,000 MW

= 1,600 kV

=Full Hydro Poweris now available …

2,502 MW

+ +

800 kV

800 kV

2,499 MW

2011, April 04


HVDC “Bulk” – Overload Characteristics

Continuous overload at Chuxiong side

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-10 -5 0 5 10 15 20 25 30 35 40

Ambient Temperature in Degree C

Ove

rload

in p

u of

500

0 M

W

(Bip

olar

)

w ith red. cooling equipment w ithout red. cooling equipment

Note: max. ambient temperature is 34.2°C in Chuxiong

Two hour overload at Chuxiong side

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1.05

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1.15

1.20

1.25

1.30

-10 -5 0 5 10 15 20 25 30 35 40

Ambient Temperatur in Degree C

Ove

rload

in p

u of

500

0 M

W (B

ipol

ar)

w ith red. cooling equipment w ithout red. cooling equipment

* 1.2 pu (required by TS)

*

Example of UHV DCYunnan-Guangdong, China (5,000 MW *)

* Chuxiong: Sending Station


HVDC “Bulk” – Overload Characteristics

Note: max. ambient temperature is 34.2°C in Chuxiong

Transient Overload at Chuxiong side with and without redundant cooling

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1.10

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-10 -5 0 5 10 15 20 25 30 35 40

Ambient Temperature in Degree C

Ove

rload

in p

u of

500

0 M

W

(Bip

olar

)

10 s overload 5 s overload 3 s overload

Transient Overload (starting from two-hour Overload)

Very high Overload Capacity = Security of Power Supply !


Yunnan-Guangdong – UHV DC completed


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Xiangjiaba-ShanghaiWorld’s biggest and longest 800 kV HVDC

08-2011

More Powerout of the Grid …

plus CO2 Reduction

Fulong Converter Station – HVDC Transformers & Thyristor Valves with new 6-inch Thyristors

In Co-Operation with


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 Commercial Operation: July 2010 – both Poles


Reduction in CO2 versus local Power Supply with Energy Mix

41 m tons p.a. – by using Hydro Power and HVDC for Transmission

World’s biggest and longest 800 kV UHV DCSystem in Operation – State Grid Corporation of China

Xiangjiaba-ShanghaiFulong – World’s biggest HVDC Converter Station in Operation: Transformers & Thyristor Valves with new 6-inch Thyristors from Siemens


Schematic Arrangement of Xiangjiaba-Shanghai Converters



Thyristor Modular Unit for Fulong Converter Station



Design of Thyristor Valves for Fulong Station:Latest Development of Power Thyristors: 6“-ETT


DC Current Capability ofmore than 4,500 A Optimum Blocking Voltage

of 8.5 kV Joining of the Silicon Pellet

to a Molybdenum Carrier Diskusing low-Temperature high-Pressure Sintering Excellent thermal Coupling Low thermal Resistance Outstanding Short-Circuit

Current Capability: > 80 kA High Reliability, Failure Rate < 10 fit

6“ high-Power Thyristor – compared with 4“ and 5“ Elements


Arrangement of 800 kV Converters for Fulong Station


Two HV and two LVValve Towers for Fulong Converter Station during Erection for thedielectric Type Testsin Xihari HV Test Fieldin Xi‘an, China(Arresters not yet connected)


Conclusions:Prospects of Smart and Bulk PowerTransmission Technologies


Sunan

To Sichuan Power GridJinping Plant I

GuandiLinping

Jinping Plant I I

Xichang

Wuhan

Guangdong

LeshanChongqing

Changsha

Shanghai


* 7,200 MW+/- 800 kV DC

2013

* 6.4 GW initially

2,095 km

+/- 800 kV DC

For Comparison: Germany

World’s biggest and longest 800 kV UHV DCProject: Jinping – State Grid Corporation of China

RWE amprion

Elia 50hertz

TenneTtranspower

EnBWTransport-netze

840 km

Yulong – World’s biggest HVDC Converter Station*: Thyristor Valves with new 6-inch Thyristors from Siemens

Jinping-Sunan

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World’s biggest 500 kV HVDC Transmission Project: 2 Systems in parallel – China Southern Power Grid

6,400 MW2 x +/- 500 kV DC

1,268 km

Xiluodo-Guangdong

Reduction in CO2 similar Benefits as in UHV DC Projects

Zhaotong – World’s biggest 500 kV Converter Station: 2 x 3,200 MW with Thyristor Valves from Siemens

2013

44 08-2011 Power Transmission SolutionsE T PS S/Re Power Transmission SolutionsE T PS S/Re

Connecting:Wind Power Hydro Plants Solar Fields

08-201144

The Vision: DC Energy Highway –why not in Europe too ?

44

FOSG*

Desertec

Medgrid

* Friends of the Supergrid


The Future ? Global Link for Green Energywith HVDC – including DESERTEC & SEATEC

5-10 GW DCs in China

Thank You for Your Attention !

Documents

Super Grids with UHV DC – Challenges and Solutions for ... · Super Grids with UHV DC – Challenges and Solutions for Bulk Power Transmission 2011. 2 08-2011 E T PS S/Re Power