Title :
Stability assessment of highly stressed power systems using the sparse formulation of the direct method
Author :
Abu-Elnaga, M.M. ; El-Kady, M.A. ; Findlay, R.D.
Author_Institution :
McMaster Univ., Hamilton, Ont., Canada
fDate :
11/1/1988 12:00:00 AM
Abstract :
In the stability assessment of large-scale power systems using the direct method, slow convergence and ill conditioning of computation often occur when highly stressed systems are analyzed. The authors describe a robust computerized technique to assess the transient stability of such systems using the sparse formulation of the transient energy function method. This technique combines a direct method of Gaussian elimination and a least-squares iterative method to calculate the Newton step needed in the calculation process of the unstable equilibrium point. The technique is applied to a 108 generator, 252 bus highly stressed utility system, characterized by large power flows over weak transmission links. The superiority of the sparse formulation to handle large-scale ill-conditioned systems is demonstrated
Keywords :
power system analysis computing; stability; Gaussian elimination; Newton step; bus; generator; least-squares iterative method; power flows; power system analysis computing; sparse formulation; stability analysis; stressed power systems; transient energy function; transient stability; utility system; weak transmission links; Character generation; Convergence; Iterative methods; Large-scale systems; Power generation; Power system analysis computing; Power system stability; Power system transients; Robust stability; Stability analysis;
Journal_Title :
Power Systems, IEEE Transactions on