practice of hvdc transmission technology in china

Practice of HVDC Transmission Practice of HVDC Transmission

Technology In ChinaTechnology In China

Dr. Lei, XianzhangDr. Lei, Xianzhang

State Grid Co. of ChinaState Grid Co. of China

Oct, 2011

I. Necessity of Developing HVDC Transmission Technology

III. Introduction of ±±±±500kV and ±±±±660kV project

Content

ⅣⅣⅣⅣ. Introduction of ±±±±800kV project

II. Overview of HVDC technique in china

I. Necessity of Developing HVDC Transmission Technology

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127200127200127200127200

172100172100172100172100

2005年2005年2005年2005年 2010年2010年2010年2010年 2012年2012年2012年2012年 2015年2015年2015年2015年 2020年2020年2020年2020年 2030年2030年2030年2030年

24811248112481124811

3970039700397003970048100481004810048100

59700597005970059700

76700767007670076700

103700103700103700103700

2005年2005年2005年2005年 2010年2010年2010年2010年 2012年2012年2012年2012年 2015年2015年2015年2015年 2020年2020年2020年2020年 2030年2030年2030年2030年

9.9%9.9%9.9%9.9%10.1%10.1%10.1%10.1% 7.5%7.5%7.5%7.5%

5.1%5.1%5.1%5.1%3.1%3.1%3.1%3.1%

10.4% 10.4% 10.4% 10.4%

10.9%10.9%10.9%10.9% 9.3%9.3%9.3%9.3%

5.2%5.2%5.2%5.2%

3.1%3.1%3.1%3.1%

8.5%8.5%8.5%8.5%

9.3%9.3%9.3%9.3%

In ten years to In ten years to

come, Chinacome, China’’s total s total

power consumption power consumption

and maximum load and maximum load

will doublewill double

In 2020, total In 2020, total

power consumption power consumption

will reach 7670 TWh, will reach 7670 TWh,

maximum Loadmaximum Load

will reach 1272 GWwill reach 1272 GW

1. Consistent Rapid Growth of Power Demand1. Consistent Rapid Growth of Power Demand

2. Uneven Distribution of Energy Resource and 2. Uneven Distribution of Energy Resource and

Load CenterLoad Center

� North China & West China:

2/3 Coal & wind & solar Energy

� Southwest China: 4/5 Water

Energy

� Power demand concentrates in

East and Central China.

� Distance between energy base

and load center between

800~3500 km.

� China needs to develop

remote and bulk power

transmission to optimize power

allocation nationwide

西藏西藏西藏西藏

台湾

Coal

Hydro

Load Centers

华中华中华中华中

西北西北西北西北

南方

华东华东华东华东

华北华北华北华北

东北东北东北东北

Wind Power

II. Overview of HVDC technique in china

±±±±800kV DC800kV DC800kV DC800kV DC


750kV AC750kV AC750kV AC750kV AC1000kV AC1000kV AC1000kV AC1000kV AC


Fulong

Nanyang

North

Jingmen

North-

east

South

East

DeyangDeyangDeyangDeyang

BaojiBaojiBaojiBaoji

North-west

Tibet Fengxian

echengechengechengecheng

LongquanLongquanLongquanLongquan

GezhoubaGezhoubaGezhoubaGezhoubaYiduYiduYiduYidu

huaxinghuaxinghuaxinghuaxing

nanqiaonanqiaonanqiaonanqiao

JianglingJianglingJianglingJianglingCentral

zhenpingzhenpingzhenpingzhenping

Changzhi

sunan

JinpingJinpingJinpingJinping

NingdongShandongShandongShandongShandong

tuanlingtuanlingtuanlingtuanling

fenjingfenjingfenjingfenjing

UHV AC and UHV DC Transmission UHV AC and UHV DC Transmission

Projects in ChinaProjects in China

Changzhi Substation

Nanyang Switch Station

Jingmen Substation

Fengxian Converter Station

Fulong Converter Station

GeermuGeermuGeermuGeermu

LasaLasaLasaLasa

ChuxiongChuxiongChuxiongChuxiong

SuidongSuidongSuidongSuidong

�The DC transmission Projects play an important role in energy optimization.

11 ±±±±500kV HVDC Lines,1 ±±±±660kV HVDC Line,2 ±±±±800kV UHVDC lines in operation.

� 9 ±±±±800kV projects in 5 years,

and more in the future.

�±±±± 1100kV UHVDC under progress.

2 projects in 5 years.

±±±±660kV in green

±±±±800kV in red

±±±±1100kV in purple

UHVDC &HVDC Scheme in China

Existing Projects and Future Plan

UHV in China in 2015

UHV AC Transmission Towers

1,000 kV1,000 kV Pilot ProjectPilot Project

E T PS S/Re01-201110

Sources:

For Redundancy - 2 Lines:

System 1 System 2

Power Transmission Solutions

Go to UHV DC

800 kV DC Towers

11 01-2011 Power Transmission SolutionsE T PS S/Re Power Transmission SolutionsE T PS S/Re

Electric Field Strength: 1,000 kV UHV AC

Sectional View of the Transmission Line Vertical to the Line Axis

5 kV/m - 10 kV/m

10 kV/m - 20 kV/m

20 kV/m - 50 kV/m

50 kV/m - 100 kV/m

> 100 kV/m

Source: Siemens E D SE PTI - 2005

For Comparison: ±±±± 800 kV UHV DC

5 kV/m - 10 kV/m

10 kV/m - 20 kV/m

20 kV/m - 50 kV/m

50 kV/m - 100 kV/m

> 100 kV/m

Sectional View of the Transmission Line Vertical to the Line Axis

Source: Siemens E D SE PTI – 2011

Build a worldBuild a world--class test and research platformclass test and research platform

In order to support researches on key technologies, SGCC has

built a world-class test and research platform which is taking

the lead in comprehensive R&D capabilities.

� UHV AC test base

�� UHV DC test base

� High altitude test base

� UHV engineering mechanics test base

� Large grid simulation center

� UHVDC Consultant and Engineering center

III. Introduction of ±±±±500kV and ±±±±660kV project

Brief of Brief of ±±±±±±±±500kV 3GS project 500kV 3GS project

� Engineering Parameters of 3GS

Rated voltage:

Rated current:

Rated capability:

Line long:

Equipments purchase contracts:

Starting building:

Being in business operation:

±±±±500 kV

3000 A

3000 MW

1048 km

2004.06

2004.12

2006.11

� Yidu Converter station

� The total area is 18.7 hectares；；；；� Converter transformer:14 units(2 for backup),297.5MVA per unit；；；；

� 12-pulse thyristor valves: indoor type, air-insulated, water cooling；；；；� AC filter: 3 banks 500kV double-tuned conventional filter；；；；� DC filter: 4 banks double-tuned conventional passive filter；；；；

� GIS:500kV AC adopts 6 bays of GIS, 3/2 connection mainly；；；；

Ground leveling Converter transformer

GIS Valve hall

AC filter bank DC filter bank


� Huaxin Converter station

� The total area is 11.8 hectares；；；；� Main equipments is similar to them of Yidu converter.

GIS connection in Huaxin Station AC PLC equipment in Huaxin Station

AC filter capacitor tower AC filter reactor


� DC Lines Project

� The entire line is 1048.6km long, with 2499 towers；；；；� 4××××ACSR-720/50 conductors;

Strain tower River cross tower

� Crossing Hanjiang River in Hubei with 2 km of crossing span;

� Crossing Yangtze River in Hubei with 2.386 km of crossing span;

� Crossing Yangtze River in Jiangsu with 2.923 km of crossing span;

Installation of space rod


� DC Line

� Design of overall dimension, unequal leg iron tower;

� The application of F type tower and steel tower;

� Design of depth-span;

� The pulling of conductor with energized parachute and heated balloon;

� The application of synthetic insulator units;

Highlights of 3GS Project Highlights of 3GS Project

Synthetic insulator unitsF type towerUnequal leg iron towerHeated balloon Energized parachute


� Carrying out the noise harness projects.

Sound insulation enclosures

Box-in Noise barrier on AC yard

Light sound absorption material on the side wall


� Localization of Three Gorges-Shanghai project

Policy: Policy: Policy: Policy: Joint design mainly locally, production through Joint design mainly locally, production through Joint design mainly locally, production through Joint design mainly locally, production through

cooperation and foreign guaranteecooperation and foreign guaranteecooperation and foreign guaranteecooperation and foreign guarantee

� All is designed by Chinese institutes expect valve hall and main

control building;

� Function specification and design work is completed by SGDC;

� Supervision of equipment manufacturing is completed by SGDC;

� Equipment used in Pole II were all manufactured locally;

� Hardware of control and protection were made by Nari Corp.

Routine test of converter transformerHanging transportation of converter transformer

Ningdong-Shandong ±±±±660660 kV

HVDC Power Transmission ProjectProject

– Sending end: Yinchuan East Converter Station

– Receiving end: Qingdao Converter Station

– Rating: 4000MW, ± 660kV,3030A

– Distance: 1335 km

– 4×1000 mm2 cross-sectional conductors

Project Construction

• Milestones

– Completion of feasibility study： Jun. 2008

– Completion of primary design

and equipment biding： Mar. 2009

– Monopolar operation： Dec. 2010

– Bipolar operation： Apr. 2011

• Yinchuan East Converter Station

Valve HallIndoor DC

Yard

AC filters

AC 330kV

AC 750kV

Converter Station Layout

ⅣⅣⅣⅣ. Introduction of ±±±±800kV project

The Project starts at Fulong Converter Station, The Project starts at Fulong Converter Station, The Project starts at Fulong Converter Station, The Project starts at Fulong Converter Station, The Project starts at Fulong Converter Station, The Project starts at Fulong Converter Station, The Project starts at Fulong Converter Station, The Project starts at Fulong Converter Station, its sending end, located in Yibin City, Sichuan its sending end, located in Yibin City, Sichuan its sending end, located in Yibin City, Sichuan its sending end, located in Yibin City, Sichuan its sending end, located in Yibin City, Sichuan its sending end, located in Yibin City, Sichuan its sending end, located in Yibin City, Sichuan its sending end, located in Yibin City, Sichuan Province and ends at Fengxian Converter Province and ends at Fengxian Converter Province and ends at Fengxian Converter Province and ends at Fengxian Converter Province and ends at Fengxian Converter Province and ends at Fengxian Converter Province and ends at Fengxian Converter Province and ends at Fengxian Converter Station in Shanghai Fengxian District. Along its Station in Shanghai Fengxian District. Along its Station in Shanghai Fengxian District. Along its Station in Shanghai Fengxian District. Along its Station in Shanghai Fengxian District. Along its Station in Shanghai Fengxian District. Along its Station in Shanghai Fengxian District. Along its Station in Shanghai Fengxian District. Along its route, the Project passes through Sichuan route, the Project passes through Sichuan route, the Project passes through Sichuan route, the Project passes through Sichuan route, the Project passes through Sichuan route, the Project passes through Sichuan route, the Project passes through Sichuan route, the Project passes through Sichuan Province, Chongqing Municipality, Hunan Province, Chongqing Municipality, Hunan Province, Chongqing Municipality, Hunan Province, Chongqing Municipality, Hunan Province, Chongqing Municipality, Hunan Province, Chongqing Municipality, Hunan Province, Chongqing Municipality, Hunan Province, Chongqing Municipality, Hunan Province, Hubei Province, Anhui Province, Province, Hubei Province, Anhui Province, Province, Hubei Province, Anhui Province, Province, Hubei Province, Anhui Province, Province, Hubei Province, Anhui Province, Province, Hubei Province, Anhui Province, Province, Hubei Province, Anhui Province, Province, Hubei Province, Anhui Province, Zhejiang Province, Jiangsu Province and Zhejiang Province, Jiangsu Province and Zhejiang Province, Jiangsu Province and Zhejiang Province, Jiangsu Province and Zhejiang Province, Jiangsu Province and Zhejiang Province, Jiangsu Province and Zhejiang Province, Jiangsu Province and Zhejiang Province, Jiangsu Province and Shanghai Municipality.Shanghai Municipality.Shanghai Municipality.Shanghai Municipality.Shanghai Municipality.Shanghai Municipality.Shanghai Municipality.Shanghai Municipality.

� Total Length: 1907km

� Rated Voltage: ±±±±800kV

� Rated Current: 4000A

� Rated Power:6400MW

� Maximum Power:7200MW

Fulong Converter Station

Transmission LinesTransmission Lines

Totally 1907km long, the Project has 3939 towers along its

route, of which averagely are 65m in height and 62t in weight,

supporting 6××××720mm2 overhead conductors.

Basic Single Line Diagram.

• Two 12 pulse groups/pole

• Transformer data

– 24 units

– 2W 300 MVA

• Smoothing inductance split in pole and neutral

• Scheme: two converters per pole:

– Installed at Itaipú,In operation for 20 years

DC filter

DC filter

DC filterDC filter

•• New DC lineNew DC line’’s equivalent s equivalent

disturbing current standard, disturbing current standard,

•• Optimized the design of DC filterOptimized the design of DC filter

•• Only one set of DC filterOnly one set of DC filter

Valve hall designValve hall design

•• Three dimension design Three dimension design

– Equipment model

– Visual and accurate arrangements

– Check the air clearance

Effective optimization of site layoutEffective optimization of site layout

•• ““田田”” arrangement of GIS and AC arrangement of GIS and AC

filterfilter

•• Face to face Valve hall Face to face Valve hall

•• Optimized width of transformer Optimized width of transformer

squaresquare

•• Fulong site,16.91 hectares, Fulong site,16.91 hectares,

Fengxian site,15.6 hectares. Fengxian site,15.6 hectares.

Converter transformerConverter transformer

•• 800kV, 300MW level UHV converter 800kV, 300MW level UHV converter

transformer transformer

•• 8 types in total, and cover 2 main 8 types in total, and cover 2 main

technical routes. technical routes.

•• main insulation structure design, main insulation structure design,

distribution of ACdistribution of AC--DC superimposed DC superimposed

electrical field, Polarelectrical field, Polar--reverse electrical reverse electrical

fieldfield

•• Insulation material performance under Insulation material performance under

different temperature/humidity/water.different temperature/humidity/water.

•• Magnetic leakage study, vortex field Magnetic leakage study, vortex field

study, shielding design, overheat.study, shielding design, overheat.

Fulong Fengxian

Capacity 321.1MVA 297.1MVA

Line side 530kV 515kV

Valve side 170.3kV 157.6kV

Tap changer

+23/-5*1.25%

+22/-6*1.25%

Impedance

18% 16.7%

3s overload

ODAF OFAF

66--inch Thyristor and valveinch Thyristor and valve

•• The first 6The first 6--inch thyristor in the world,inch thyristor in the world,

•• Valve with 800kV voltage and 4000A Valve with 800kV voltage and 4000A

current.current.

•• The maximum converting capacity of The maximum converting capacity of

single converter reaches 1,800MW.single converter reaches 1,800MW.

Fulong Fengxian

Current 4000A

Continuous overload current

4497A

Max. Short circuit current

46kA 51kA

Valve Water cooling, indoor, air insulation

Thyristor 6- inch

Smoothing reactorSmoothing reactor

•• Dry type smoothing reactorDry type smoothing reactor

•• 800kV DC voltage, 4000A DC 800kV DC voltage, 4000A DC

current, current,

•• air cooling, outdoor support, air cooling, outdoor support,

•• 16.5m height(5 m body)16.5m height(5 m body)

•• high efficiency noise isolation hood, high efficiency noise isolation hood,

81.7dB(A) 81.7dB(A) -->65.7dB(A)>65.7dB(A)

•• Fully satisfied the temperature rise Fully satisfied the temperature rise

requirementrequirement

Control and protectionControl and protection

•• ININ--time real time operation system, time real time operation system,

•• 2 from 3 2 from 3

•• Passive cooling systemPassive cooling system

•• eTDM buseTDM bus

Application of Helava technologyApplication of Helava technology

•• Optimize the route of the lineOptimize the route of the line

– shorten the length

– avoid the dense resident area and forest zone

•• 3D visual construction management platform/digital 3D visual construction management platform/digital

management of transmission line construction.management of transmission line construction.

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practice of hvdc transmission technology in china

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