Title :
Power System Transient Stability Assessment Based on Quadratic Approximation of Stability Region
Author :
Xue, Ancheng ; Wu, Felix F. ; Ni, Yixin ; Lu, Qiang ; MEI, Shengwei
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing
Abstract :
This paper presents an approach to estimate the critical clearing time (CCT) of the multi-machine power systems based on the quadratic surface which approximates the boundary of stability region relating to the controlling unstable equilibrium point. A decomposition method is developed to obtain the coefficients of the quadratic approximation surface. The CCT is determined by the crossing point of the quadratic surface and the continuous faulted trajectory. Simulations in IEEE 9-bus and New England system show the effectiveness of the proposed approach
Keywords :
power system control; power system faults; power system transient stability; quadratic programming; CCT; IEEE 9-bus; New England system; continuous faulted trajectory; critical clearing time estimation; decomposition method; multimachine power systems; power system transient stability assessment; quadratic surface approximation; stability region; unstable equilibrium point; Control systems; Councils; Manifolds; Partial differential equations; Power system faults; Power system modeling; Power system simulation; Power system stability; Power system transients; Taylor series; Controlling Unstable Equilibrium point; Critical Clear Time; Quadratic Approximation; Stability Region; Transient Stability Assessment;
Conference_Titel :
Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES
Conference_Location :
Dalian
Print_ISBN :
0-7803-9114-4
DOI :
10.1109/TDC.2005.1546779
