摘要
近年來由於電力系統的發展，電網穩定的重要性越來越突出。正確、迅速、即時的同步電力操作是為電網穩定之關鍵，並涉及電網的運行及發電機組的安全。隨著發電機的單機容量越來越大，人們已經開始注意到同步操作背後的重大意義，並努力提高同步電力裝置的自動化水準，提高操作品質顯得格外重要。 本論文以Cortex-M4架構之微控制器(MCU)實現電力系統同步用相關設備之開發設計，其主要針對兩組輸入信號之電壓、頻率與相位進行偵測與比較。訊號的分析技術採用快速傅立葉轉換進行之，並經由漢寧視窗(Hanning Window)插值演算法修正數據，以求得精準的電力資訊。同步儀表面板透過LED指示燈顯示觀測兩組輸入信號的頻率差與相位差狀況，顯示結果亦透過傳統類比式同步儀相互驗證。除此之外，本論文也整合同步電驛功能於同步儀中，當發電機端及匯流排端電壓皆符合同步條件參數，系統可以透過提供控制信號控制乾接點，自動進行發電機與系統並聯運轉。本論文研究成果證明本論文所發展的電力同步系統具有可行性與實用性。
並列摘要
In recent years, the importance of the grid stability has gotten a lot of attention. To operate the power system in a more stable manner, maintenance of generators regularly is crucial. After the maintenance of generators, reconnecting the generators to the power system relies on the synchronous operation. To correctly perform the generator synchronous operations, instruments such as synchronous scopes and synchronous relays are needed. Improper operation of synchronization may damage the generators, or cause the blackout of the power system in the worst case. In this thesis, a Cortex-M4 based MCU is used for the development of a synchronous instrument for power system applications. The frequency, voltage magnitude and phase from two input signals are compared. Fast Fourier Transform (FFT) is applied. The Hanning Window correction algorithms is used to correct the sampled signals in order to obtain precise information. The LED indicators on the front panel is used to observe the frequency differences between the two input signals, verification is performed by comparing with a traditional analog synchronous meter. Additionally, a synchronization relay function is integrated into the synchronous scope. When the synchronous conditions between the generator terminal and bus terminal voltage met, a contact is provided to automatically connect the generator to the bus automatically. From the laboratory and field tests, it is shown that the synchronous scope and synchronous relay developed in this thesis can be applied to real power systems.
參考文獻
延伸閱讀
- 蘇文良（2005）。電力系統同步發電機模擬〔碩士論文，中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu200500592
- 吳宏毅（2009）。應用於電源供應器高效率同步整流及LLC串聯諧振之設計研究〔碩士論文，國立臺北科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0006-0307200914065500
- 張軒嘉（2018）。同步電荷提取自動電路設計及其在轉動式壓電振能擷取之應用〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU201803819
- 孫慧馨（2022）。應用於壓電能量擷取系統之使用壓電振盪器主動調節式同步切換能量擷取整流IC〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU202204145
- 張村叮（2005）。Implementation of Three-Phase Fed DC Power Supply System with High Power Factor〔碩士論文，中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu200500136