本論文主要在探討嘉南農田水利會規劃小水力發電系統之個案研究。研究對象包含嘉南農田水利會既有渠道、小水力發電系統、發電量、電力傳輸線引接及成本分析。小水力發電系統的主要組件包括水輪機、發電機、變壓器、傳輸線等。研究方法是先調查嘉南農田水利會既有渠道地形，水流流量或流速等水道資料、經分析後獲取較適合的地點，再進一步選取東口工作站、嘉南大圳南幹線量水堰、嘉南大圳麻豆支線虹吸工等3個最佳設置點進行研究分析，以規劃設置發展小水力發電系統之可行性。此外，為了檢視所規劃結果與實際情形是否接近，特別比較分析近期其它小水力發電系統開發案。結果顯示，東口工作站費率為2.422(元/度)，嘉南大圳南幹線量水堰費率為2.054 (元/度)，嘉南大圳麻豆支線虹吸工處費率為1.99(元/度)。核對比較其他小水力發電廠費率情形，規劃之3案費率明顯合理，且較貼近100年度川流式水力收購費率2.1821(元/度)；規劃中之後2個地點，比較有售電收益也明顯可行。因此，在嘉南農田水利會既有渠道發展小水力發電系統是值得期待的；亦即，嘉南農田水利會可利用水利資源進一步擴展小水力發電事業以增加收益。

This investigation explores the plan of the small hydroelectric system for Chia-Nan irrigation association. There are many objects in the research, such as present irrigation ditches, small hydroelectric system, the output of power generation, power cable drawing and cost analysis. The small hydroelectric system includes a hydraulic turbine, a power generator, a transformer and cables,etc. In the research, first investigated these hydrographic data for the terrain,the flow quantity,and the flow speed about the present ditches of Chia-Nan irrigation association. After the analysis by using the said data, proper locations suitable for the installation of small hydroelectric system can be acquired, then three optimal locations, which are the Eastern station, the measuring weir of southern main drainage of Chia-Nan Canal, and the Siphon work of Madou branch of Chia-Nan Canal, are selected for the feasibility analysis of the development and installation of the small hydroelectric system. Furthermore, to inspect if the planned result and the practical situation are approximate, the other cases of the development of small hydroelectric system recently accomplished are also analyzed to give a comparison for the research of this investigation. The result shows that, the fee of the Eastern station is 2.422 NT/degree, the fee of the measuring weir of southern main drainage of Chia-Nan Canal is 2.054 NT/degree, and the fee of the Siphon work of Madou branch of Chia-Nan Canal is 1.99 NT/degree. Compared with other small hydroelectric systems about fee, the three cases planed in this research are obviously reasonable, and they are closer to the purchase price (2.1821 NT/degree) of run-of-river hydroelectric. Besides, the latter two cases can make more benefit and seem more obviously practical. Therefore, the development of small hydroelectric system over the present ditches of Chia-Nan irrigation association is worthy of expectation. In other words, Chia-Nan irrigation association can use the water resources to expand the business of small hydroelectric system for making more profit.

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