發展再生能源已是全球的趨勢，世界各國紛紛提出不同政策，目的皆為大力推動再生能源發展，隨著再生能源滲透率增加，因慣量下降和備轉容量降低，系統頻率穩定性的問題也隨之而來，目前台電公司做法為透過儲能系統提供輔助服務來因應此問題，並無透過再生能源發電裝置本身。
本文目的在於探討太陽光電透過降載來參加電力系統頻率響應的方法，以及情境分析，比較「不同再生能源滲透率」、「降載功能有無」和「不同降載比率」對系統頻率響應的影響。
研究先以IEEE 39 Bus系統做為小系統驗證降載功能效果，模擬情境分為不同再生能源滲透率以及各滲透率下不同降載比率，模擬結果驗證了再生能源滲透率增加會減少系統慣量，而降載功能確實能有效的改善系統頻率響應，又以降載比率越高，改善的效果越好，若皆採用相同降載比率，滲透率較高之情境頻率會因提供之功率儲備較多，頻率響應改善效果較好，以同樣方法在全台電力系統中模擬，降載功能同樣可以改善頻率響應。本文驗證了太陽光電機組降載參與頻率響應之效果，在再生能源高佔比情境下，能提升系統慣量並有效的改善頻率響應。

Developing renewable energy has become a global trend, with countries around the world proposing different policies to promote renewable energy development. As the penetration rate of renewable energy increases, issues related to system frequency stability arise due to the decrease in inertia and reduced reserve power capacity. Currently, Taiwan Power Company addresses this issue by utilizing energy storage systems to provide auxiliary services, rather than relying on the renewable energy generation devices themselves.
The purpose of this article is to explore the method of using solar photovoltaics through deloading technique to participate in power system frequency response and conduct a scenario analysis. It aims to compare the impact of "different penetration rates of renewable energy," "presence or absence of load shedding functionality," and "different load shedding ratios" on system frequency response.
This study verifies the effectiveness of deloading functionality by using the IEEE 39 Bus system as a small-scale system. The simulation scenarios involve different penetration rates of renewable energy and different deloading ratios corresponding to each penetration rate. The simulation results confirm that increasing the penetration rate of renewable energy reduces system inertia, and the deloading functionality effectively improves system frequency response. Furthermore, higher deloading ratios result in better improvement. In scenarios where the same deloading ratio is adopted, higher penetration rates provide better frequency response improvement due to the availability of more power reserves.
Using the same method, this study simulates the entire power system in Taiwan. The deloading functionality also improves frequency response. The study validates the effectiveness of solar photovoltaic units participating in frequency response by deloading technique. During high penetration of renewable energy, this practice can enhance system inertia and effectively improve frequency response.

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