考慮風力發電併入澎湖電力系統保護策略之研究

A Study on Peng-Hu Power System Protection Scheme by Considering Wind Power Generation

陳唯泰(Wei-tai Chen)

指導教授 ： 陳斌魁

大同大學/電機資訊學院/電機工程學系所/碩士(2008年)

摘要

澎湖離島風力資源豐富，風場容量因數 (capacity factor) 高達47%以上，預計陸續會有更多風機加入此以柴油機為主之電力系統，鑑於澎湖多次發生全島停電事件，且目前既有電力防禦計畫未考慮風機運轉對供電可靠度的影響，本研究提出到2010年風力發電併入電力系統離峰時風電佔比30.81%情況下，對系統電壓、頻率和供電可靠度造成的影響，同時提出納入考慮風機運轉之電力防禦計畫，以改善既有的電力防禦計畫(只有低頻卸載方案)。
本研究是以PSS/E電力系統模擬軟體為工具，並考慮風機模型及相關保護電驛設定，以既有調度準則針對澎湖地區於2010年在不同季節時期之不同發電及負載狀況下，模擬並檢視中屯及湖西風力發電併入澎湖電力系統後，重要匯流排與指標饋線之穩態及動態的反應，並依模擬系統事故所得之結果，探討既有的電力防禦計畫(低頻卸載方案)之盲點，重新擬定保護架構及調整保護電驛之設定，包含某些事故造成孤島運轉之保護策略，期能提高此離島電力系統供電可靠度。

關鍵字

低頻卸載 ； 電力防禦計畫 ； 孤島運轉 ； 風力發電

並列摘要

In the plentiful wind resource on the Peng-Hu island, the capacity factor of the wind farm is up to 47%. It is expected that in a near future, more wind generating units will soon be integrated into this power system where diesel generators are the main power sources. Due to many blackouts occurs at Peng-Hu island in the past, the present power protection scheme has not taken the influence of the wind generating units into consideration. Therefore, this study mainly analyzes the system impact on voltage, frequency and amount of the curtailed load on the Peng-Hu system with the wind generation penetration level up to being 30.81% during the winter off-peak period in 2010. Besides, a better power protection scheme for considering the influence of the wind generating units is proposed in order to improve the present power protection scheme based on the underfrequency relays.
By using the power system simulation program PSS/E, the wind turbine models and the protective relay settings are considered. According to the present dispatching criterion concerning with the different generation/load pattern in the different seasons of 2010, the system steady state and transient response in some specific buses and key-index feeders are analyzed with wind generations integrated into the systems. The original power protection scheme (underfrequency load shedding) is examined, and a new protection scheme is proposed based on numerous contingences simulation, including relay settings and islanding operation protection for some specific cases. It is expected that the reliability improvement of the Peng-Hu system can be achieved.

並列關鍵字

underfrequency load shedding ； power protection scheme ； islanding operation ； wind generation

參考文獻

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