10MW浮動半潛式離岸直驅式風力發電機於台灣海峽環境之全機組動態分析及控制之研究

Dynamic Simulation and Control of 10MW Semi-submersible Floating Direct-Driving Offshore Wind Turbine Under Taiwan Strait Environment

林靖(Ching Lin)

指導教授 ： 江茂雄

國立臺灣大學/工學院/工程科學及海洋工程學研究所/碩士(2021年)

https://doi.org/10.6342/NTU202103935

摘要

本研究以浮動式風力發電機結合LIFES50+ OO-Star Wind Floater Semi 10MW半潛式浮台、IEA 10MW葉片和直驅式永磁同步發電機，透過MATLAB/ Simulink和Simpack的軟體整合，進行浮動式風力發電機建模、風機控制器建立以及風機全機模擬。Simpack進行風力發電機浮台、塔柱、機艙、葉片的建模以及模擬海底深度的設定，藉由空氣動力計算程式AeroDyn、水動力計算軟體HydroDyn、繫纜錨碇分析軟體MAP++進行同步模擬。浮台水動力係數以WAMIT進行分析，再輸入到HydroDyn進行風機模擬。MATLAB/Simulink中發展風力發電機控制器、永磁同步發電機(Direct-Drive Permanent Magnet Synchronous Generator)建模、液壓葉片旋角系統、以及MATLAB/Simulink同步模擬模塊SIMAT。控制器發展包含轉子轉速控制器、葉片旋角控制器、磁場導向控制及電網側變流器控制。控制策略共分為三個部分，分別為追蹤最佳葉尖速比區、額定轉速區以及功率恆定區，目標在不損壞風力發電機組的情況下，擷取最大的風能。根據上述控制策略進行動態模擬分析，驗證風力發電機在不同區間的穩定性，以及不同區域轉換下控制器的表現。針對同樣錨點不同繫纜長度的情況下進行模擬，比較浮台的位移、繫纜內部的繩張力的差異，對風力發電機的影響進行分析探討。最後以1%及3%的紊流風速的風況進行模擬，驗證本研究的風機控制系統在紊流下的性能。

關鍵字

浮動半潛式 ； 直驅式風力發電機 ； 永磁同步發電機 ； 葉片變旋角控制系統 ； 發電機變轉速控制系統 ； 液壓控制系統 ； 繫纜錨碇系統 ； 台灣海峽環境 ； 發電機變轉速控制

並列摘要

This study aims to investigate the 10MW semi-submersible floating wind turbine with a direct-drive permanent magnet synchronous generator under the environment of Taiwan Strait. The floating wind turbine is composed of LIFES50+ OO-Star Wind Floater Semi 10MW platform and IEA 10MW wind turbine. The co-simulation system is combined with Simpack, MATLAB/ Simulink and FAST. The model of the floating platform, mooring system, nacelle, and rotor blade are built in Simpack. Simpack is a multibody system simulation software. FAST contains several subsystems, including aerodynamic software library, time-domain hydrodynamics module, and mooring analysis module can be used for aero-hydro-servo-elastic simulation. Hydrodynamic coefficients of the floating platform are preprocessing from WAMIT which is used to analysis the wave interaction with structures. Other parts of the system are built in MATLAB/Simulink, which include the direct-drive permanent magnet synchronous generator model, hydraulic blade pitch system, wind turbine controller. Different lengths of mooring system are compared and discussed to show the motion influence to the floating wind turbine. Finally, the developed models and controllers of the floating wind turbine were investigated under turbulence conditions to verify the performance of the controller.

並列關鍵字

semi-submersible ； floating direct-driving wind turbine ； permanent-magnet synchronous generator ； variable-pitch control system ； hydraulic servo valve control ； variable-generator control system ； mooring system ； Taiwan strait environment

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