Northeast Asia Petroleum Forum 2009

IEEJ: November 2009

Applied Research onOffshore Oil Field Wind Energy
ZOU Hua单击此处编辑副标题
China National Offshore Oil CorporationOctober 27, 2009IEEJ: November 2009

Outline
1、Introduction of applying offshore oil fieldwind power
2、Applied demonstrative research ofoffshore oil field wind power
3、Applicative prospect of offshore oil fieldwind power

IEEJ: November 2009

1、Introduction of applying offshore oil field wind power As of 2008, capacity of the world's offshore wind power installed
reach to nearly 1.473 million kilowatts, mainly concentrated in Europe First, up to now, as limitations of wind power,offshore wind power are
essentially grid-based, while off-grid wind power is small Second，offshore oil production platforms need green power supply,
reducing fossil energy consumption and emission, saving energy

IEEJ: November 2009

1、Introduction of applying offshore oil field wind power
The traditional view，when a large capacity of wind power access to thegrid, after a certain proportion (over 10%) ，would be some technicalissues，mainly including：（1）Stability of power grid When the capacity of wind power reach to a certain proportion of regional
power grid,stability of voltage and frequency,power quality may be affected Likely to cause line voltage too low to enable the WTGs connected to thegrid, or owing to the frequently action of the WTG’s protection system andthe WTG being frequently disconnected from the grid
 The grid operation maybe may be affected since the fluctuations of windspeed may affect the power grid’s productionIEEJ: November 2009

1、Introduction of applying offshore oil field wind power（2）Possibility of Wind Farm Control
 Wind speed is random, making the production random fluctuant.
 When wind farm production is lower than the load, other power
generators must response timely and contribute the grid a greater
production.
 Wind speed is not controllable, the WTG’s production is also not easy
to control. The wind farm can not be as easy as conventional power
plants to achieve a reliable scheduling.

IEEJ: November 2009

1、Introduction of applying offshore oil field wind power
To eliminate the adverse effects on the stability of the grid caused by thelarge-scale development of wind power ，Complementary systems ofvarious energy appear，mainly including： Wind power - hydro ； Wind Power - Solar Power ； Compressed Air Energy Storage ； Wind Power - Diesel Power ； Wind power - hydrogen energy storage;
Wind power - Solar energy - fuel Wind power - fuel cell hybrid generating;cell hybrid generating system Wind power - Solar energy - fuel cell hybrid generating and so on.

IEEJ: November 2009

1、Introduction of applying offshore oil field wind power Concrete embodiment of CNOOC comprehensive energy company strategy
 Explore new ways of wind power to supply offshore oil production

Smoothoperation ofpower grid atoffshore
platform island

Technical Difficulties：
 Wind power connection to the grid ;Selection and development ofoffshore WTG; The installation technology and equipment foroffshore WTG.

IEEJ: November 2009

Outline
1、Introduction of applying offshore oil fieldwind power
2、Applied demonstrative research ofoffshore oil field wind power
3、Applicative prospect of offshore oil fieldwind power

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind power
Offshore oil field wind power demonstrative project selection
Considerations：Wind resource;
Oil Production;
impact;1500kW风力发电站

5 km
海底复合电缆

Grid conditions;
Oil field load demand.

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind power
Overview of Offshore oil field wind power demonstrative project Location ：Bohai SZ36-1 oilfield Capacity ：1500kW
 Distance to shore ：70km
 Hub height ：57m
 Water Depth ：31.5m

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind power
Basic conditions of Offshore oil field wind power demonstrative project Annual average wind speed is 7.6m/s，Annual average wind power density
is 552.2w/m2，Maximum wind speed 23.3m/s，wind direction is stable A small island grid system, of which the neutral point of the three-phase
three-wire grid is not grounded Voltage：6.3kV/10.5kV/400V/3.3kV
 4 sets of 6300V turbine generators(10MW, 3 operation+1 spare)+2
emergency diesel

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind power
Technology research of offshore oil filed wind power ——WTG selection
 Considering the WTG’s impaction to the grid, the WTG’s capacity range:750-1500kW。
 According to the maximum wind speed on the 50m-70m mean sea level, the IECⅡ andabove WTG will be selected.
 Considering the demand of the oilfieldpower grid status，reducing the impact
to the grid，the 1500kW Permanent
magnet direct-drive type wind turbine wasfinally selected.

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind power
Offshore oil field wind power demonstrative project——WTG control sys
偏航刹车叶轮刹风车向标风速环仪

境温度自动加偏航

压

泵电

偏

航

机

1

电

机

2偏航

电

机

3

脂P t1 0 0液

T B 1机

控配电

制电机

2

平机

37*0. 75mm

电

风

2架升

发柜

2*0. 4mm

塔

制信号电缆

舱

控DP总线专用屏蔽电缆

机

舱提柜

台
间变

光纤

低压

C E P 平主 开 关操作

站电

气

台
间

及流

电

柜容

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind power
Technology research of offshore oil filed wind power ——Grid connection
 WTG—Turbine generators merge operation is the first time in China. The key
point to ensure the power quality and reliable operation is that if the GOV andAVR regulation performance of the existing turbine generators can match theWTG’s output power and voltage changes complementally.
 WTG’s cut in and cut out, as well as fluctuations of wind power will affect thepower grid voltage and frequency, therefore, the response speed of AVR andGOV are very important to maintaining the stability of the grid’s operation.
 Two important indicators to evaluate the impact of wind power on the grid ofsuch a small isolated grid can be confirmed only through the actual runningIEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind power
Technology research of offshore oil filed wind power ——Grid connection

Electrical single line diagram system

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind power
Offshore oil field wind power demonstrative project——On shore test ofWTG-Turbine generator merge operation
 To observe the characters of WTG when connected to a small grid and forecast theeffect of actual operation on shore, the WTG and a set of 1100kW diesel generator wereconnected together to carry out the onshore test，
 Through test，the system can keep balance during
the transient impact and also the steady operation，
illustrates the feasibility of diesel engines and WTG；
the wind power penetration ratio broke the limit of
5% according to normal onshore wind farmexperience, even more than 20%。

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind energy
Offshore oil field wind power demonstrative project——On shore test of
WTG-Turbine generator merge operation

System DiagramIEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind energy
Offshore oil field wind power demonstrative project——Simulation of
WTG-Turbine generator merge operation
 to simulate better the operation of offshore producing platforms, we
conducted a diesel and wind hybrid power systems simulation.
 Use non-real-time simulation tool PSCAD/ EMTDC and real-time
simulation tool RTDS/RSCAD to simulate and study the peration ofplatforms merged with wind power.
 Simulation results show：it is feasible to introducing wind power
into power grid of offshore oil platforms, when the platform power
grid operates stably, the 1500kW WTG cut-in, cut-out andemergently shutdown, the power grid can also be stable.

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind energy
Offshore oil field wind power demonstrative project——Simulation ofWTG-Turbine generator merge operation

RTDS simulation of wind turbineputting into operation

RTDS simulation of all
cut off process

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind energy
Offshore oil field wind power demonstrative project——offshore test ofWTG-Turbine generator merge operation
 After the WTG’s pre-commissioning completed, it was only connected with one turbinegenerator; after it succeeded, the test was conducted gradually; at last, the power grid
was configured by WTG and all the turbine generators, to supply the oil platform’s load.
 Results show: when the oil platform power grid operates stably, the 1500kW WTG cut-in,cut-out and emergently shutdown, the power grid can also be stable.
 The maximum wind power capacity in the SZ36-1 oil platform power grid is 3 sets of
1.5MW wind turbine

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320

IEEJ: November 20092、Applied demonstrative research of offshore oilfield wind energy

Offshore oil field wind power demonstrative project——offshore test of
WTG-Turbine generator merge operation风电机组连续试运行

22

20

18

16

14

12
平均风速(m/s)

10
最大风速(m/s)

8
平均功率(100kW)

6
最大功率(100kW)

420t

Trend Chart of wind turbine output power change with wind speed

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind energy
Offshore oil field wind power demonstrative project——grid connection
and operation
 This project was successfully connectedto the grid on November 8, 2007，and
there was no negative affection ； This unit passed performance test on
January 11, 2008 ； Up to now，the project operated
stably ，and total production reaches 6
million kWh after several trials；
 Energy-saving and emission
reduction:5300 tons of CO2

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind energy
Offshore oil field wind power demonstrative project——results
 Completed a merge system design and stability analysis, mathematicalsimulation model.
 Successfully built a physical simulation system.
 Successful implement the WTG connected with a oilfield weak power grid.

1500kW
WTG

690V
BUS

690V/400V
Transformer

diagram of physical simulation system

400V
BUS
2000kW
Load

1100kW
Diesel tur.

IEEJ: November 2009

2、Applied demonstrative research of offshore oilfield wind energy
In addition, we also carried out the following research： Offshore wind turbine foundation infrastructure Model； Offshore wind turbine Installation/Transportation technology；
 Research of WTG adaptability to the offshore environment； Research of Operation and Maintenance Management ；IEEJ: November 2009

Outline
1、Introduction of applying offshore oil fieldwind power
2、Applied demonstrative research ofoffshore oil field wind power
3、Applicative prospect of offshore oil fieldwind power

IEEJ: November 2009

3、Applicative prospect of offshore oil field wind power Up to now，oilfield grid electric indicators reach to requirements，
WTG operates safely and smoothly. Achieved improvement of avariety of power sources in the offshore platform, and promote richexperience for future wind energy utilization project.
 There are thousands of oil platforms completed and underconstruction in the world ，If we can reduce fuel consumption
effectively or provide other forms of new energy，it will greatly
reduce production costs and promote energy-saving and emission
reduction activities.

IEEJ: November 2009

3、Applicative prospect of offshore oil field wind power
 CNOOC is developing a stable set of independent wind-power andbattery combination power systems，and applied to offshore
production platforms, explore the feasibility of making wind power
as a additional power to platform ，explore roads of effective usingof the rich wind energy resources at sea and alternating part or all
oilfield fuel some or all of the alternative fuels oil in the future

IEEJ: November 2009

3、Applicative prospect of offshore oil field wind power At present, the system has entered a substantial researchand development stage, and has achieved good results.

风机控制系统

风电机组
(MW级)

变压单
元

应急电源系统

独立电源控
制系统

负荷配送单元整流/逆变单元

蓄能电池负载

 Diagram of an independent wind power and battery
combination power supply system

IEEJ: November 2009

THANK YOU!
Contact : report@tky.ieej.or.jp