台灣電網孤島事件偵測研究

Abstract

在電力系統中，故障分為許多類型，孤島運轉為其中的一種。本論文主要目的為提出一套電力預警系統來偵測電網是否發生孤島運轉，能即時偵測孤島運轉有助於電力監控人員做出迅速的應對，以提升台灣電網的穩定性。本研究提出的電力預警系統是基於使用廣域量測儀器所收集的資訊，並將之應用於本論文中提出的孤島運轉偵測演算法來進行故障的判斷。在研究中對廣域量測儀器的技術規範與最佳安裝位置進行分析與討論，並以PSS/E模擬軟體來模擬台灣電網發生孤島運轉事件，再由Matlab建出的演算法進行分析及判斷。

Power system islanding disturbance is one of the most severe consequences of wide-area system failures. The purpose of this thesis is to propose an islanding contingency detecting and warning scheme to detect whether there is an islanding scenario in the power grid. The islanding contingency detecting and warning scheme can help power monitoring personnel detect the islanding operation immediately. It also enhances the power stability of the Taiwan grid. The proposed system in this study is based on the information collected by phasor measurement units which is applied to the islanding operation detection algorithm to detect the fault. The standard of phasor measurement unit and optimal PMU placement are analyzed and discussed. The PSS/E software is employed to simulate the islanding scenarios in Taiwan power grid and develop the algorithm in Matlab for judgment of the islanding operation.