china low-temperature wind turbine design and application
DESCRIPTION
Presentation by Qiying Zhang, Guodian United Power, Dexin He, CWEA at Winterwind 2012. "China low-temperature wind turbine design and application"TRANSCRIPT
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China low-temperature wind turbine design and its application
- Qiying Zhang Guodian United Power China
- Professor He Dexin, CWEA
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China low-temperature wind turbine design and its application
• Status of Wind Power Development
• Cold Climate in China
• Technical solutions , effect and problems
• Further actions
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Status of Wind Power Development
- In order to cope with climate change and reduce GHG emissions, the - In order to cope with climate change and reduce GHG emissions, the Chinese government put forward the strategic objective that “Non-fossil energy will represent 15% of the energy by 2020.”
-The government also has the target to reduce carbon emissions “40% to 45% by 2020 per GDP compared to the level of 2005.”
-To achieve the goals, Chinese government began implementing “The
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-To achieve the goals, Chinese government began implementing “The Renewable Energy Law “ in 2005
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By 2010, the newly installed capacity is 18.9 GW. The total installed
Status of Wind Power Development
By 2010, the newly installed capacity is 18.9 GW. The total installedcapacity is 44.7GW. China has ranked on top in the world.
By the end of 2011, the installed capacity is above 60GW. The newlygrid-connected wind power in 2011 is 15.85GW and accumulatedamount is 47GW.
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200%
40000
50000
Status of Wind Power Development
50%
100%
150%
10000
20000
30000
40000
5
0%02001 2002 2003 2004 2005 2006 2007 2008 2009 2010
Newly Installed Capacity 42 66 98 197 507 1288 3311 6154 13803 18928
Total Installed Capacity 381 448 546 743 1250 2537 5848 12002 25805 44733
Increasing Rate of NIC -46% 59% 48% 100% 158% 154% 157% 86% 124% 37%
Increasing Rate of TIC 12% 17% 22% 36% 68% 103% 131% 105% 115% 73%
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Status of Wind Power Development
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2010 Annual Installed Market Share by Capacity
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Status of Wind Power Development
United Power
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Multi-MW wind turbines
Status of Wind Power Development
Sinovel 6MW Guodian United Power 6MW Goldwind 2.5MW
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At present, the main WEC type is 1.5-3MW,some 6MW machines has
been produced for prototype, and the even bigger wind turbine is under
development.
Sinovel 6MW Guodian United Power 6MW Goldwind 2.5MW
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Status of Wind Power Development
Unit
: Yu
an R
MB
/kW
Pre
ssure
fro
m P
rice
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Trend of WEC Price
Pre
ssure
fro
m P
rice
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The ground test platform of WEC components
Status of Wind Power Development
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Status of Wind Power Development
WEC should support the grid!
11Source: China Electric Power Research Institute
Low voltage ride-through (LVRT)
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0.4
0.5
0.6
Status of Wind Power Development
Basic Research(973 and 863 Program)
0
0.1
0.2
0.3
0.4
2 4 6 8 10 12 14
Tip speed ratio
Cp
FVM
CFD
EXP
“Aerodynamics Basic Research for Large Scale WEC”
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4mX3m wind tunnel
8mX6m/12 mX16m wind tunnel
Φ3.2m wind tunnel
Numerical simulation
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Cold Climate in China
Most area of North China is Cold Climate for wind turbine!
13http://www.cma.gov.cn/tqyb/v2/product/product2011.php http://news.86516.com/tupian/h005/h77/577481.shtml
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Cold Climate in China
At the same time, some of these areas is also Hot Climate for wind turbine!
14From: China Meteorological Administration
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Cold Climate in China
There are also sandstorms in these area every year!
15From: China Meteorological Administration
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Cold Climate in China
Wind Turbines will be installed the area from the sea level from 0 to 4,000 meters!
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The environment of the wind parks is normally the
Technical solutions effect and problems
The environment of the wind parks is normally the combination of the above mentioned two factors or even more!
Not only Cold Climate…, but...
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North West China
- Cold Climate + Hot Climate + Sandstorm
Cold Climate in China
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20
30
40
50
1 2 3 4 5 6 7 8 9 10 11 12
Tem
per
ature
°° °°C
ALaShankou(North West China) Temperature 1957-2011
- Cold Climate + Hot Climate + Sandstorm
- air density is 1.401kg/m^3 in winter, and 1.088 kg/m^3 in summer
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-40
-30
-20
-10
0
10
Tem
per
ature
average high temperature average low temperature
extreme high temperature extreme low temperature
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North China
- Cold Climate + Sandstorm
Cold Climate in China
0
10
20
30
40
1 2 3 4 5 6 7 8 9 10 11 12
Tem
per
ature
°° °°C
HuiTengXiLe(North China) Temperature 1957-2008
- Cold Climate + Sandstorm
- air density is 1.102kg/m^3 in winter, and 0.902kg/m^3 in summer
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-40
-30
-20
-10
0
Tem
per
ature
average high temperature average low temperature
extreme high temperature extreme low temperature
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North East China
- Cold Climate
Cold Climate in China
01020304050
1 2 3 4 5 6 7 8 9 10 11 12
Tem
per
ature
°° °°C
HaiLaEr(North East China) Temperature 1957-2008
- Cold Climate
- air density is 1.349kg/m^3 in winter, and 1.065kg/m^3 in summer
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-60-50-40-30-20-10
0
Tem
per
ature
average high temperature average low temperature
extreme high temperature extreme low temperature
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The environment of the wind parks is normally the combination of the above mentioned two factors or even
Technical solutions effect and problems
combination of the above mentioned two factors or even more!
The design of wind turbine suitable for all of these areas is a great challenge for the manufacturer in China.
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Cost &
Quality
Cold Climate
Technical solutionseffect and problems
Cost &
Quality
Hot Climate
Sandstorm
Plateau climate
Platform Strategy
Sam
e structu
re desig
n
Differen
t Material
Differen
t Config
uratio
n
Differen
t Contro
l
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Sam
e structu
re desig
n
Differen
t Material
Differen
t Config
uratio
n
Differen
t Contro
l
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Loads
- Winter and Summer – big difference
Technical solutions effect and problems
wind parkaltitude
(m)low
temperatureair density
winterhigh
temperatureair densitysummer
density difference
NorthWest China
A La Shankou
300 -30°C 1.401 40°C 1.088 129%
North ChinaHui
TengXiLe2100 -26°C 1.102 30°C 0.902 122%
North East China
Hai LaEr 612 -30°C 1.349 35°C 1.065 127%
- Winter and Summer – big difference
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East China
In China the cold area is in high altitude region, this compensate somewhat the increase of air density because of low
temperature. But it is not always the case! Capability to design blade is very important!
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Material
- deep cooperation wind suppliers
Technical solutions effect and problems
Component Hub Main FrameBearingHousing
Normal Climate QT400-18AL Q345D QT400-18AL
Cold ClimateQT400-18AL(impact test Q345E
QT400-18AL(impact test
- deep cooperation wind suppliers
- deep cooperation with certification body
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Cold Climate (impact test 12J at -40°C)
Q345E (impact test 12J at -40°C)
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Components
Technical solutionseffect and problems
- All the components must be cold climate
- Cold climate test at the suppliers
- Gearbox cold climate start up test,
generator cold climate test
- Control System, Pitch System…
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Integrated Development is the solution, because 50% “know-how” is at supplier!
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Cooling System
- standard wind turbine
Technical solutionseffect and problems
- standard wind turbine
be afraid of hot in summer and afraid of cold
in winter.
- High altitude => low air density => lower
cooling capacity => larger air cooler or limit the power
- Sandstorm => Sealing of the Nacelle Cover => Filter System
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altitude dependent specificcooling capacity
0m 2.2 kW/K800m 2.0 kW/K2000m 1.6 kW/K
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Heating System- standard wind turbine
Technical solutionseffect and problems
- standard wind turbine
be afraid of hot in summer and afraid of cold in winter.
- EFFICIENT COLD START UP
=> distributed heating equipments
oil sump heating, heating jackets or hoses,
winding heating
=> Supporting fan heating
commissioning and maintenance(important)
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commissioning and maintenance(important)
=> good nacelle cover thermal isolation
The time for Cold Start Up has big influence on productivity, so that it is a important parameter for Customer Satisfaction
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Sensors
Technical solutionseffect and problems
- ICE Detecting Sensor- ICE Detecting Sensor
- Cold Climate Wind Speed Sensor and Wind Direction
Sensor
- Redundancy for wind Speed Sensor
- Plastic or Metal
- DEEP cooperation with supplier
(Technology, Cost and Quality)
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(Technology, Cost and Quality)
Working Sensors is the precondition for load assumptions!
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ICE
Technical solutionseffect and problems
- Expensive Task- Expensive Task
- Experience
new blade has less ice than old one
=> smooth?
=> clean?
=> maintained?
- Ideas and Reality
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solutions, some patents, less industrial use
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Technical solutionseffect and problems
Effect and problems
- newly installed wind turbines shows good availability- newly installed wind turbines shows good availability
- cooling system works also well in summer
- cold start up works well, but time is relative long => productivity
- duty blade or sandstorm => ice on the blade
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Effect and problems
Technical solutionseffect and problems
- far from residential area => bad maintenance condition
- cost pressure / technology => active de-ice system is not widely used
=> productivity
- far from residential area => bad maintenance condition
- far from consumer => relative weak grid => grid connection
=> more cold start up
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Further Action
The Optimization should go further!
- intelligent Control (big air density difference, cold climate and hot climate)- better maintenance- cheaper de-ice system- all kinds of measurement- cooling system for hub because of also hot climate - …- …
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- …
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Further Action
Ice Rain: Cold Climate in Normal Climate
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Thank you for your attention!
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