離岸風電工程在規劃設計時，常採用以歐洲海域資料分析所得之參數為輸入，然而台灣周遭海域之海氣象特性有別於歐洲海域，因此，本研究分析適用於台灣海峽海域之設計參數，主要針對德國聯邦海事和水文局(BSH)之設計標準: 關於專屬經濟海域內離岸結構物之結構設計的最低要求、IEC 61400-3: 風力發電機-第3部分:離岸風電之設計要求以及ISO 19901-1：石油及天然氣工業-離岸結構物的具體要求-第1部分：海氣象設計和運作注意事項，以上規範中所提及之風暴(storm)影響時間、JONSWAP波譜參數及波浪統計比值進行探究。
本文分析位於台灣海峽北段之新竹資料浮標長期實測資料，先提出影響該海域之颱風評選條件，過去24年共有39個颱風對新竹海域海況造成影響，分析結果顯示，颱風期間海面浪高超過最大波高一半之惡劣海況影響時間平均為19.6小時，僅為BSH規範建議值之56%。本研究提出，台灣海峽海域惡劣海象除颱風影響外，還應考慮東北季風影響，東北季風期間之最大示性波高不若颱風期間為大，但該惡劣海況影響時間平均為40.6小時，為颱風期間之兩倍。本文另外針對台灣海峽北部海域之JONSWAP波譜參數進行分析，結果顯示平時海況之譜峰增強因子γ值約為1.68，惡劣海況期間約為1.39，該數值遠小於規範建議值3.3。針對波浪統計參數的比值分析發現，最大波高和示性波高比值為1.46，最大波高對應之週期和尖峰週期的比值為0.91，符合ISO19901-1規範建議範圍，而尖峰週期與示性波高之相關係數為5.8，且指數為0.42，平均週期與示性波高之相關係數為4.4且指數為0.29，兩者皆不符合Goda (2000)建議值。本文最後使用了位於台灣海峽中段彰化外海的浮標資料進行比較分析，結果顯示該海域之惡劣海象影響時間與新竹海域有所差異，顯示台灣海峽之海象變異性頗大，對於離岸風電工程之設計參數，宜採用當地或鄰近海域資料進行分析，過遠測站資料分析結果恐有高度不確定性。

In the design of offshore wind turbines, European metocean parameters are often used to input the parameter setting. However, the metocean characteristics of Taiwanese waters are different from those of European seas. Therefore, this study discusses the storm impact time, JONSWAP spectral parameters and wave statistical ratios from the design standards, which are Bundesamt für Seeschifffahrt und Hydrographie (BSH): Standard Design, Minimum requirements concerning the constructive design of offshore structures within the Exclusive Economic Zone, IEC 61400-3: Wind turbines - Part 3 Design requirements for offshore wind turbines and ISO 19901-1: Petroleum and natural gas industries - Specific requirements for offshore structures - Part 1: Metocean design and operating considerations.
This paper analyzes the long-term data of the Hsinchu buoy, and proposes the selection criteria for typhoons. In the past 24 years, a total of 39 typhoons have affected the sea conditions in the waters of Hsinchu. The result shows that the average impact time is 19.6 hours, which is 56% of the recommended value of BSH standard. The author considers that the influence of the northeast monsoon on severe sea state should be taken into account. The average impact time of northeast monsoon is 40.6 hours. In addition, this paper analyzes the JONSWAP spectrum in the northern seas of the Taiwan Strait. The result shows that the peak enhancement factor is about 1.68 in normal sea state and 1.39 in severe sea state. According to the ratio analysis of wave statistical parameters, it is found the ratio of the maximum wave height to the significant wave height is 1.46, and the ratio of maximum period to the peak period is 0.91. The correlation coefficient between the peak period and the significant wave height is 5.8, the power is 0.42, and the correlation coefficient between the mean period and the significant wave height is 4.4, the power is 0.29. Finally, we use the data of Changhua buoy for comparative analysis. The results show the impact time of the severe sea state in this sea area is different from that in the Hsinchu seas.

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