Applied Research esearch on Offshore Oil Field …Bohai SZ36-1 oilfield Capacity ： 1500kW Distance...

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AApplied pplied RResearchesearch on on Offshore Oil FieldOffshore Oil Field Wind EnergyWind Energy

ZOU Hua

China National Offshore Oil Corporation

October 27, 2009

Northeast Asia Petroleum Forum 2009 IEEJ: November 2009

Outline

1、Introduction of applying offshore oil field

wind power

2、Applied demonstrative research of

offshore oil field wind power

3、Applicative prospect of offshore oil field

wind power

IEEJ: November 2009

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

1、Introduction of applying offshore oil field wind power

IEEJ: November 2009

The traditional view，when a large capacity of wind power access to the

grid, after a certain proportion (over 10%) ，would be some technical

issues，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 the

grid, or owing to the frequently action of the WTG’s protection system and

the WTG being frequently disconnected from the grid

The grid operation maybe may be affected since the fluctuations of wind

speed may affect the power grid’s production


IEEJ: November 2009

（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

To eliminate the adverse effects on the stability of the grid caused by the

large-scale development of wind power ，Complementary systems of

various 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 - fuel cell hybrid generating;

Wind power - Solar energy - fuel cell hybrid generating and so on.

Wind power - Solar energy - fuel

cell hybrid generating system


IEEJ: November 2009

Smooth operation of power grid at offshore platform island

Concrete embodiment of CNOOC comprehensive energy company strategy

Explore new ways of wind power to supply offshore oil production

Technical Difficulties：

Wind power connection to the grid ;Selection and development of offshore WTG; The installation technology and equipment for offshore WTG.


IEEJ: November 2009

Outline


wind power




wind power

IEEJ: November 2009

22、、AApplied pplied demonstrativedemonstrative researchresearch of offshore oil of offshore oil field wind powerfield wind power

5 km海底复

合电缆

1500kW风力发

电站

Offshore oil field wind power demonstrative project selection

Considerations：

Wind resource;

Oil Production;

impact;

Grid conditions;

Oil field load demand.

IEEJ: November 2009

Location ：Bohai SZ36-1 oilfield

Capacity ：1500kW

Distance to shore ：70km

Hub height ：57m

Water Depth ：31.5m

Overview of Offshore oil field wind power demonstrative project


IEEJ: November 2009

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


Basic conditions of Offshore oil field wind power demonstrative project

IEEJ: November 2009

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 and

above WTG will be selected.

Considering the demand of the oilfield

power grid status，reducing the impact

to the grid，the 1500kW Permanent

magnet direct-drive type wind turbine was

finally selected.


Technology research of offshore oil filed wind power ——WTG selection

IEEJ: November 2009

液压泵

偏航机电 1

偏航机电 2

提升机

塔架

P t 1 0 0

速风仪

向风标境温度环偏航刹车叶刹轮车

T B 1 机发电

控制柜

机舱

平台风电配电间

C E P 平台

主开关间

37*0.75mm2

信号电缆

2*0.4mm2

DP总线

专用屏

蔽电缆

操作站

光纤

偏航机电 3自加脂动

流柜变

低气及容压电电

机控制柜舱


Offshore oil field wind power demonstrative project——WTG control sys

IEEJ: November 2009

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 and

AVR regulation performance of the existing turbine generators can match the

WTG’s output power and voltage changes complementally.

WTG’s cut in and cut out, as well as fluctuations of wind power will affect the

power grid voltage and frequency, therefore, the response speed of AVR and

GOV 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 of

such a small isolated grid can be confirmed only through the actual running


Technology research of offshore oil filed wind power ——Grid connection

IEEJ: November 2009

Electrical single line diagram system


Technology research of offshore oil filed wind power ——Grid connection

IEEJ: November 2009

To observe the characters of WTG when connected to a small grid and forecast the

effect of actual operation on shore, the WTG and a set of 1100kW diesel generator were

connected 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 farm

experience, even more than 20%。


Offshore oil field wind power demonstrative project——On shore test of WTG-Turbine generator merge operation

IEEJ: November 2009

System Diagram

22、、AApplied pplied demonstrativedemonstrative researchresearch of offshore oil of offshore oil field wind energyfield wind energy

Offshore oil field wind power demonstrative project——On shore test of WTG-Turbine generator merge operation

IEEJ: November 2009

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 of

platforms 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 and

emergently shutdown, the power grid can also be stable.


Offshore oil field wind power demonstrative project——Simulation of WTG-Turbine generator merge operation

IEEJ: November 2009

RTDS simulation of wind turbine putting into operation

RTDS simulation of all

cut off process


Offshore oil field wind power demonstrative project——Simulation of WTG-Turbine generator merge operation

IEEJ: November 2009

After the WTG’s pre-commissioning completed, it was only connected with one turbine generator; 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


Offshore oil field wind power demonstrative project——offshore test of WTG-Turbine generator merge operation

IEEJ: November 2009

风电机组连续试运行

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t

平均风速(m/s)

最大风速(m/s)

平均功率(100kW)

最大功率(100kW)

Trend Chart of wind turbine output power change with wind speed


Offshore oil field wind power demonstrative project——offshore test of WTG-Turbine generator merge operation

IEEJ: November 2009

This project was successfully connected

to 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


Offshore oil field wind power demonstrative project——grid connection and operation

IEEJ: November 2009

Completed a merge system design and stability analysis, mathematical

simulation model.

Successfully built a physical simulation system.

Successful implement the WTG connected with a oilfield weak power grid.

diagram of physical simulation system

1500kWWTG

690V BUS

690V/400V Transformer

400VBUS

1100kW Diesel tur.

2000kWLoad


Offshore oil field wind power demonstrative project——results

IEEJ: November 2009

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


wind power




wind power

IEEJ: November 2009

Up to now，oilfield grid electric indicators reach to requirements，

WTG operates safely and smoothly. Achieved improvement of a variety of power sources in the offshore platform, and promote rich experience for future wind energy utilization project.

There are thousands of oil platforms completed and under construction 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.

33、、Applicative prospect of offshore oil field wind powerApplicative prospect of offshore oil field wind power

IEEJ: November 2009

CNOOC is developing a stable set of independent wind-power and battery 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 using of 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

At present, the system has entered a substantial research

and development stage, and has achieved good results.

风电机组

(MW级)

变压单

元

负荷配送

单元

整流/逆

变单元

蓄能电

池

负载

风机控制系统应急电源系统独立电源控

制系统

Diagram of an independent wind power and battery

combination power supply system


IEEJ: November 2009

THANK YOU!

IEEJ: November 2009

Contact : [email protected]

Applied Research esearch on Offshore Oil Field …Bohai SZ36-1 oilfield Capacity ： 1500kW Distance...

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Transcript of Applied Research esearch on Offshore Oil Field …Bohai SZ36-1 oilfield Capacity ： 1500kW Distance...