- 學位論文
以PQDIF格式實現電力品質監控及資料傳輸系統
Implementation of Power Quality Monitoring System with Data Transmission in PQDIF Format
摘要
能源問題乃時下全世界最關心的議題，隨著科技不斷地進步，相對也帶動各產業的發展，但在追求高經濟成長的同時，各產業使用的設備耗電率及使用壽命則成為生產成本中的關鍵角色。電力能源使用相關政策近年來已成為政府及民眾首要關切的問題，舉凡工業生產機台、大電力使用設備及公共用電設施等，若能在電力品質監控下達到最有效率使用，節約能源的議題必定能大大躍進。 本論文以ARM Cortex-M3單晶片作為電力品質監控系統的核心；系統利用移動視窗進行電壓有效值運算以作為判斷不良電力品質事件的依據，並配合事件通道儲存機制的設計建立由電力品質資料交換格式(Power Quality Data Interchange Format, PQDIF)所記錄而成的檔案文件，以方便監測人員可透過PQDIF格式檔案詳細觀察電力異常發生時的前後狀態。在事件檔案傳輸功能方面，監控系統利用簡單式檔案傳輸通訊協定(Trivial File Transfer Protocol, TFTP)作為PQDIF資料傳輸基礎，進行電力品質監控後端監測工作。為求高精準度的不良電力品質事件時間定位資訊，本論文藉由接收全球定位系統(Global Position System , GPS)信號作為監控系統內部時鐘更新標準以及秒脈衝信號作為事件發生之時間戳記。綜合本論文開發重點，電力品質監控系統在監測到電力異常發生後，能即時將事件資料記錄成具有高精準度時間戳記的PQDIF格式文件，並藉由檔案傳輸機制將事件檔案同步傳送至指定後端監測器以完成電力品質監控作業。
並列摘要
Energy problems are the most concerned issue of the world nowadays. As the technology is constantly evolving, various industries are in the status of thriving. In order to achieve high economic growth, it’s important to care about the power consumption and life time of all equipment that we use. Policies relate with the usage of the power energy has become a primary concern of the government and people in recent years. If the equipment, like industrial production machines, heavy load equipment and public electricity facilities can be operated more efficiently, the energy conservation issues can certainly be achieved. In this thesis, a microcontroller that is ARM Cortex-M3 based is used as the kernel of the monitoring platform. The monitoring system calculates the root mean square (RMS) data of voltage is used to determine the status of the power quality event. Moving window is used to speed up the detection of these events. With the design of storage architecture, the monitoring platform is able to record the event in a file that complies the PQDIF standard. Therefore, the waveform before and after the state of the abnormal power quality event can be observed through PQDIF file when an event occurs. To transfer the recorded file to a central station, TFTP is used. To obtain higher time tag precision, GPS receiver module is employed in the monitoring platform to achieve internal time clock update work and mini second precision for the power quality event recording. By integrating peripheral functions, e.g. PQDIF, TFTP based recorded files transmission work and event timestamp that GPS based for the monitoring system. The power quality measurement and data transmission work are developed and tested with real environment to verify the functionality.