臺灣博碩士論文加值系統

現在社會中，電力是人們生活中不可或缺的資源，確保電力供應才能保障社會運轉，由於近年來再生能源發電量佔比逐漸提升，而再生能源的發電量由氣候決定，這導致大量不確定性的發電量併入電網，容易使系統電壓產生波動，因此如何讓系統能維持正常運轉至關重要。
過去的機組排程只考慮了經濟性與效率，很容易忽略了系統的安全性以及穩定性，若系統中的無功補償裝置不足，電壓產生劇烈波動，快速下降，系統將發生電壓崩潰，最嚴重可能會造成大規模停電，甚至會引發全系統的事故發生。
為了能有效預防電壓崩潰的事件發生，本文運用系統中的各項參數，匯流排的電壓、線路阻抗...等等進行計算，提出了一個電壓穩定指標，透過對該指標的分析，運用線性規劃加入限制式，調整發電機的出力，可以決定出一個更符合電壓穩定性的機組排程，除了讓系統符合經濟效益外，也能夠提高系統的對電壓波動的承受能力。

In contemporary society, electricity is an indispensable resource for daily life, and ensuring a stable power supply is crucial for maintaining societal operations. In recent years, the proportion of electricity generated from renewable energy sources has gradually increased. However, since the power output from renewable sources is determined by climatic conditions, this introduces significant uncertainty into the power grid, potentially causing system voltage fluctuations. Therefore, it is essential to ensure the stable operation of the system.

Historically, unit commitment scheduling primarily focused on economic efficiency, often neglecting system security and stability. Insufficient reactive power compensation devices within the system can lead to severe voltage fluctuations and rapid declines, ultimately resulting in voltage collapse. In the worst-case scenario, this may cause large-scale blackouts and potentially trigger widespread system failures.

To effectively prevent voltage collapse incidents, this paper utilizes various system parameters, such as bus voltages and line impedances, to develop a voltage stability index. By analyzing this index and incorporating constraints through linear programming, we can adjust the output of generators to determine a unit commitment schedule that better ensures voltage stability. This approach not only achieves economic efficiency but also enhances the system's resilience to voltage fluctuations.

摘要 I
Abstract II
目次 III
圖次 IV
表次 V
第一章 緒論 1
1.1研究背景 1
1.2文獻探討 3
1.2.1電壓穩定指標 5
1.2.2機組排程 7
1.3研究目的與方法 9
第二章 問題描述 10
2.1再生能源發電對於電壓穩定度之影響 10
2.2電壓穩定指標 11
2.3機組排程 12
第三章 理論模型 13
3.1電壓穩定指標FVSI計算 13
3.2機組排程限制式 19
3.3案例模擬流程 23
第四章 案例模擬分析 25
4.1 建立各機組對各線路FVSI數值影響力之係數矩陣 26
4.2機組排程結果分析 32
4.2.1 FVSI門檻值為0.85與不考慮FVSI之機組排程成本分析 33
4.2.2 FVSI門檻值遞減，找到電壓穩定度最高之機組排程 41
4.2.3 機組排程模型與PSSE執行電力潮流解所得之FVSI比較 46
4.3以迭代方法提高機組排程模型之精確性 51
第五章 結論與未來研究方向 60
5.1結論 60
5.2未來研究方向 61
參考文獻 62
附錄一 64

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