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IEC TC88 : Wind turbines. Republic of Korea. Outline . New Proposal of Korea. Status of the WTs in Korea. Roadmap of an On/Offshore WTs in Korea. Design & Motion Analysis of the FOWT. Conclusions. New Proposal of KOREA.

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slide1

IEC TC88 : Wind turbines

Republic of Korea

outline
Outline

New Proposal of Korea

Status of the WTs in Korea

Roadmap of an On/Offshore WTs in Korea

Design & Motion Analysis of the FOWT

Conclusions

new proposal of korea
New Proposal of KOREA
  • • To provide uniform methodology for assessment of the floating offshore wind turbine.
  • • Assessment of design, analysis, installation and maintenance of FOWT for a various types.
  • This work will aim to bring together expert knowledge from the wind energy and offshore engineering industries in order to formulate a guideline specification of the design, analysis, installation and maintenance requirements for FOWT.
new proposal of korea1
New Proposal of KOREA

CONTENTS

1Scope

2Normative references

3Terms and definitions

3.1Terms

3.2Definitions

4Symbols and abbreviated terms

4.1Symbols

4.2Abbreviated terms

5General requirements

5.1Fundamental requirements

5.2Safety requirements

5.3Basic considerations

6Design requirements

6.1Introduction

6.2General

6.3Structural Categorization

6.4Design criteria

6.5Accidental loads

7Environmental criteria

7.1Environmental condition

7.2Wind, waves, current

7.3Water depth

7.4Ice

7.5Soil conditions

7.6Marine growth

7.7Earthquakes

7.8Scour

7.9Other environmental conditions

  • 8Floating offshore wind turbine structure design and analysis
  • 8.1Introduction

8.2Type of hulls

8.3Hydrostatic stability

8.4Hydrodynamic response analysis

8.5Structural design and strength analysis

8.6Fatigue analysis

8.7TLP design and analysis

8.8SPAR design and analysis

8.9Barge design and analysis

8.10 Other hulls design and analysis

9Mooring system design and analysis

9.1Fundamental requirements

9.2Safety requirements

9.3Design situations

9.4Design criteria

9.5Anchoring systems

9.6Corrosion

9.7Fatigue life

9.8Strength and fatigue analysis

10Fabrication, installation, inspection and maintenance

10.1 Introduction

10.2 Structural fabrication

10.3 Mooring system fabrication

10.4 Transportation

10.5 Installation operations

10.6 Inspection and testing

10.7 Maintenance and repair

11Materials, welding, and corrosion protection

11.1 Introduction

11.2 Steel

11.3 Corrosion protection system

11.4 Nonlinear materials

12Reference

global wind energy 2000 2030 in gw
Global WIND ENERGY 2000-2030 (in GW)

Offshore 150 GW

Offshore 40 GW

Global offshore wind trend

Source : EWEA

resource of wind turbine in korea
Resource of Wind Turbine in Korea

Energy density[W/m2]

Wind velocity[m/s]

Water depth[m]

Source : KIER Wind Map v1.1

Wind energy(offshore<20m depth)

status of wind turbine market in korea
Status of Wind Turbine Market in Korea

• Period of 3-5 years in Wind turbine will invest 9 million dollar annually by Korea Government.

• Technology development plan for the future Market

-“Development of floating offshore wind turbine systems”

selected as Strategic Technology by Korea Government

• A distribution plan 2.25GW through Wind turbine by 2012.

-3MW, 5MWoffshore wind turbine development

• Various offshore wind farmInvestment Agreement in progress (MOU).

status of wind turbine market in korea1

Yanggu 20,000 kW

Gangneung 25,000 kW

Angang 30,000 kW

Yanggu 19,500 kW

Daegiri 40,000 kW

Daegwanryeong 102,890 kW

Gyeonggi 3,000 kW

Pyeongchang 19,800 kW

Daegiri 2,750 kW

Nanjido 100 kW

Ansan 3,000 kW

Jeongseon 50,000kW

Donghae 60,000 kW

Ulleung-gun 600 kW

Nuaeseom 7,500 kW

Hoengseong 40,000 kW

Seokbo-myeon 160,000 kW

Taebaek 6,800 kW

Taean 267,500 kW

Yeongyang 18,000 kW

Yeongdeok 39,600 kW

Gimcheon 200,000 kW

KIER 100 kW

Saemangeum 22,500 kW

Pohang 660 kW

Saemangeum 7,900 kW

Sajapyeongwon 110,000 kW

Miryang 750 kW

Sinan 300,000 kW

(1st 3MW)

Gori 750 kW

Yangsan 8,000 kW

Jindo 100,000 kW

Installed 277,995 kW

Prospect WTs

1,630,000 kW

Samdal 20,000 kW

Dongbuk 20,000 kW

Deokcheon 40,000 kW

Wolryeong 100 kW

Woljung 1,500 kW

Hangyeong 30,000 kW

Haengwon 9,795 kW

Hangyeong 22,700 kW

Sangdo 31,500 kW

Nansan 14,700 kW

Seongsan 20,000 kW

Cheongsuri 3,000 kW

Pyosyeon 20,000 kW

Gapado 27,000 kW

Godeok 20,000 kW

Status of Wind Turbine Market in Korea

Installed wind farm

Being installed wind farm

r d roadmap of wind turbine in korea
R&D Roadmap of Wind Turbine in Korea

Main

Target

1st Stage 2004~2007 Technology development and Industrialization

2nd Stage 2008~2012

Technology Accumulation

3rd Stage 2013~2018

Creating new Industry

Medium sized System Commercialization /

Component Development

Large System Development /Component Localization and Expert

Large System Export/ Commercialization of Application technology

Onshore

System

Site Searching

Large scale Wind Farm Development

Wind farm Construction in Asia

Component Localization

and Export

Site testing & Supplying Medium

Sized Systems

Pioneering abroad Market for

components

Component Analysis and

Design

750kW – Site test

2MW – Design and

Manufacturing

2MW – Site test

Offshore

System

2MW Remodeling

and Manufacturing

2MW – Site test

Multi MW class

Offshore Wind

turbine Supply

Pioneering

abroad market

for Components

Offshore wind turbine

Component Design

Component Localization

3MW Design and

Manufacturing

3MW – Site test

3MW – Concept

Design

5~6MW Design and

Manufacturing

5~6MW – Site test

Large Offshore wind farm

Searching

Large scale Offshore Wind

Farm Development

Small

System

Supply Small Sized

Systems

Pioneering abroad market

for Components

10kW Manufacturing

10kW-Site test

Hybrid System Development

100kW Design and

Manufacturing

100kW-Site test

conceptual design framework

Basic Requirement

  • - Turbine Capacity, Motion Requirement
  • Environmental Condition
  • - Water depth, Wind, Current, Wave, Ice etc

Design Basis

Hydrodynamic Analysis

Initial Design

Structural Analysis

Global/Local Strength

Fatigue Analysis

Conceptual Design Framework
  • Hydrodynamic Data
  • - Wind Load, Current Load
  • - Motion Analysis : Motion RAO, Force Transfer Function
  • Time Domain Analysis
  • - Platform Motion : Angular Displacement, Acceleration
  • - Mooring Line Tension
  • Hull Sizing
  • Mooring System
  • Loading Condition
  • Stability Check
  • Prediction of Motion Characteristics
analysis methodology procedures
Analysis Methodology & Procedures

CRITICALMOORING LINEREMOVED

STATICMOORING SYSTEMDISPLACEMENTSAND TENSIONS

STEADYENVIRONMENTAL LOADS

YES

YES

DAMAGECONDITION(incl. TRANSIENT)ANALYSIS ?

DESIGNENVIRONMENTALCONDITION

VESSELSLOW FREQUENCYMOTIONS

TIME DOMAINLINETENSIONS

NO

VESSELSWAVE FREQUENCYMOTIONS

DYNAMICCONDITIONANALYSIS ?

DYNAMICSTUDY

NO

ANALYSISCOMPLETED

design basis of wt platform
Design Basis of WT Platform

Horizontal Motion Limits

Rotational Motion Limits

Acceleration Limits

Simple Geometry

Minimizing Heave Motion

Pretension

Offshore Platform Type = ?

Number of Mooring Lines

Displacement

tlp type
TLP Type

Total Weight

Topside weight

Steel Weight

Fixed Ballast

Displacement

Draft

VCG

VCB

GMT,L

Radius of Gyration (@ COG)

Rxx

Ryy

Rzz

Mooring Line Characteristics

No. of Line

Dia.

Elasticity Modulus

MBL

spar type
SPAR Type

Total Weight

Topside weight

Steel Weight

Fixed Ballast

Displacement

Draft

VCG

VCB

GMT,L

Radius of Gyration (@ COG)

Rxx

Ryy

Rzz

Mooring Line Characteristics

No. of Line

Dia.

Elasticity Modulus

MBL

characteristics of floating offshore wt for each types
Characteristics of floating offshore WT for each types

TLP Type

TLP

  • Horizontal Motion, surge mode, has to be improved to meet excursion
  • limitation which is generally 5% of water depth in offshore field
  • Vertical motions are too good to be true
  • Motion criteria, especially acceleration at the location of nacelle will be
  • needed at the early design stage
  • KG is higher than KB

SPAR Type

SPAR

  • Permanent eccentricity is to be counter-balanced by the arrangements
  • of the fixed ballast
  • Simple structure
  • KB is higher than KG
  • Lowered KG by fixed ballast
conclusion
Conclusion

• At present, the technology of a floating offshore wind turbine is not established and studying continuously.

• Experts need to create a new standard to compare the calculation data of floating offshore wind turbine for various load cases.

• A new standard should be dealt with by experts separately(>IEC 61400-3)