In this paper, first, a rotor angle trajectory model based on polynomial functions is proposed. Afterwards, a response-based approach for online prediction of power system angular instability is presented. The proposed method utilizes bus phase angle data measured by phasor measurement unit at the point of common coupling of power plant transformer to the bulk power grid. In the prediction process, by computing the second order derivative of post-fault data, the starting point of the calculation data window is determined. Next, a fifth-degree polynomial curve is fitted on the designated data window to predict the angular curve of generating unit. Based on the sign of the first order derivative of predicted curve, the angular stability of generating unit is judged. This approach is testified on the western system coordinating council standard test bed under different operation and fault type scenarios. Taking into account various fault conditions and their associated occurrence probability, a probabilistic index is also defined to sum up the overall performance of the new method. Simulation results confirm that the proposed method outperforms the existing ones in terms of both accuracy and speed. Prediction results could be used in generator rejection schemes to prevent severe power plant outages.
Hajnorouzi, A., Shayanfar, H. (2019). A response-based approach to online prediction of generating unit angular stability. Scientia Iranica, 26(Special Issue on machine learning, data analytics, and advanced optimization techniques in modern power systems [Transactions on Computer Science & Engineering and Electrical Engineering(D)]), 3592-3605. doi: 10.24200/sci.2019.53966.3517
MLA
Aliakbar Hajnorouzi; Heidarali Shayanfar. "A response-based approach to online prediction of generating unit angular stability". Scientia Iranica, 26, Special Issue on machine learning, data analytics, and advanced optimization techniques in modern power systems [Transactions on Computer Science & Engineering and Electrical Engineering(D)], 2019, 3592-3605. doi: 10.24200/sci.2019.53966.3517
HARVARD
Hajnorouzi, A., Shayanfar, H. (2019). 'A response-based approach to online prediction of generating unit angular stability', Scientia Iranica, 26(Special Issue on machine learning, data analytics, and advanced optimization techniques in modern power systems [Transactions on Computer Science & Engineering and Electrical Engineering(D)]), pp. 3592-3605. doi: 10.24200/sci.2019.53966.3517
VANCOUVER
Hajnorouzi, A., Shayanfar, H. A response-based approach to online prediction of generating unit angular stability. Scientia Iranica, 2019; 26(Special Issue on machine learning, data analytics, and advanced optimization techniques in modern power systems [Transactions on Computer Science & Engineering and Electrical Engineering(D)]): 3592-3605. doi: 10.24200/sci.2019.53966.3517