由於電力系統包含大量非線性負載，使得配電系統之電力品質污染日趨嚴重，因此電力品質污染防治與供電品質穩定之提昇，業已成為電力公司與用戶所要面對之重要課題。本研究提出應用個人數位助理(PDA)協助電力品質監測與分析。由於PDA具備親和力之人機介面，且體積小，方便攜帶，及具有網路通訊之功能，且與現有無線及有線的網路通訊協定相容，因此本研究即構思應用PDA所具備之優勢以達成電力品質分析儀之研製。本論文應用Client∕Server的架構，並開發資源交換協定，可將欲分析的資料藉由PDA傳送至電力品質分析伺服器進行分析，並傳回分析結果，其中並結合資料庫備份之技術，以提供使用者日後評估或改進電力品質參考之需。文中對於諧波、閃爍、電力不平衡等模擬信號均予以縝密測試，證實本論文所研製之系統確具可行性及實用價值。

With the broad usage of nonlinear equipments in a modern power system, it has resulted in serious pollution to the supplying power; therefore, the improvement of power quality issue becomes an urgent concern to both utilities and customers. In this thesis, an application of personal digital assistant (PDA) implementing the functions of virtual instrument for the electric power quality monitoring is proposed. Because the PDA is of small- size and lightweight, it is very useful for engineers to carry to the field for any required measurement task. Then, the data collected in the PDA can be transmitted back to the server for a detailed analysis, by which the database is also constructed for the information storage and future references. In this thesis, to facilitate the data transmission, a communication protocol is also developed for the resource exchange need. In this way, the communication efficiency between server and client can be better improved. This integrated approach has been tested under different scenarios, including the harmonics, flickers, and unbalances. Test results support the feasibility of the method for the applications considered.

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