TY - JOUR T1 - Prediction of transient instability and unplanned islanding using phasor measurements data TT - پیش‌بینی ناپایداری گذرا و جزیره شدگی ناخواسته سیستم قدرت با استفاده از اطلاعات PMU JF - joc-isice JO - joc-isice VL - 14 IS - 1 UR - http://joc.kntu.ac.ir/article-1-439-en.html Y1 - 2020 SP - 25 EP - 32 KW - Islanding KW - Prediction KW - Transient instability KW - Optimization N2 - in this paper a new algorithm has been proposed to predict unplanned islanding. To predict unplanned islanding, rotor angle and speed time series have been used. Times of fault occurrence and clearance are estimated using monitoring system response based on the variation of phasor measure data. The estimated times of fault occurrence and clearance are used to determine suitable calculation window for uncontrolled islanding prediction. The proposed algorithm is applied to IEEE 39 bus test system. The result shows that the objective function can be used to estimate fault occurring and clearance time to predict unplanned islanding. M3 10.29252/joc.14.1.25 ER -