Stability Of Large-scale Power Systems Research Articles

ON THE STABILITY OF LARGE-SCALE POWER SYSTEMS

Abstract This paper deals with the problem of transient stability of large-scale power systems by visting decomposition-aggregation techniques. In this approach based on a priori criteria, the system is decomposed to N-subsystems, the first (N— 1) subsystems described by linear model and the Nthdescribed by nonlinear model. Then each linear subsystem is reduced by aggregation techniques to an equivalent machine. Using this approach the problem of transient stability of large power systems is investigated. An algorithm for calculating the critical switching time based on this technique is proposed. The validity of this method is examined by studying large power systems of 11 machines, and the results obtained using IBM 370/165 digital computer of L.A-A.S. are reported.

Decomposition-aggregation of large-scale power systems and stability studies

In this paper the problem of transient stability of large-scale power systems is examined through decomposition-aggregation techniques. Two approaches for decomposition and reduction of dynamical models of the systems are described. Then the stability studies for the reduced models are investigated, and some of the results of application of these approaches to a practical system are reported.

Network calculations for power system stability studies using bus admittance matrix

Network calculations can be made to account for frequency dependance on network elements. The method utilizes a current source model for synchronous machines. Since use is made of the sparse bus admittance matrix of the network, the method is suitable for large-scale power system stability studies.