| Summary: | 博士 === 國立成功大學 === 電機工程學系碩博士班 === 97 === Since the price of international petroleum is continuously increasing and severe pollution and gradual exhaustion of traditional fossil resources arise, the research and development the renewable-energy resources become an important topic recently. In order to capture more wind energy from wind, the selection of suitable wind turbine generators (WTGs) for different wind farms (WFs) is an important task. Currently, commercial WTGs generally have different values of hub height and rated capacity, even under the same rated capacity. This dissertation presents a novel approach based on Weibull distribution function to determine the capacity of WTGs using capacity factor (CF), normalized average power (PN), and the product of CF and PN under different values of hub height and rated wind speed. Rayleigh distribution function is also used to derive the equations for CF and pairing performance (PP), and both CF and PP results using Weibull and Rayleigh distribution functions are compared. The simulation results of WTGs for five WFs in Taiwan show that suitable values for both shape parameter and scale parameters of Weibull distribution as well as wind turbine capacity are all very important for selecting WFs of installing WTGs. The scale parameter of Weibull distribution can be used to determine whether a WF is good or not.
This dissertation, in Appendix, also employs four existing cost analysis methods such simple payback period, cost of energy (COE), discounted cash flow (DCF), life-cycle costing (LCC) to study different values of capacity and hub height of WTGs that have been installed in WFs of Taiwan. Important factors affecting wind cost of energy in comparison with economic results using the proposed economic-analysis methods for different WFs are also presented.
Steady-state performance analysis of a commercial WF in Taiwan through field measurement results and computer simulations is also performed. Through comparing field measured results, this dissertation establishes a simulation model to simulate and analyze the steady-state characteristics of the studied WF under disturbance conditions. Steady-state results and transient performance of variable current-limit reactors (CLRs) and adjusting load tap changers (LTCs) of main transformer of a commercial WF in Taiwan are also carried out.
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