| 摘要 |
PURPOSE:To judge a steady state stability with a high accuracy by a method wherein, in order to contract the exact model of a generator and produce a simplified model, the braking factors of the generator are so adjusted as to have attenuation constants and periods of both the models agree with each other. CONSTITUTION:An adjusted quantity calculating means S10 calculates the adjusted components D1, D2- Dm by adjusting breaking factors. A factor matrix A producing means S20 produces the factor matrix A and a characteristic value calculation and stability judging means S30 obtains the factor matrix A. The output values, phase angles, etc., of a generator which are measured by a measurement means S40 from a power system (P) at the time of operation are transmitted through a transmission means S50 as the elements of the characteristic values sigma+jomega and the factor matrix A is produced by the central judging and processing part. The characteristic value sigma+jomega is calculated from the factor matrix A and, if sigma of the characteristic value is negative, the state is judged to be stable and, if sigma is positive, the state is judged to be unstable. With this constitution, the degree of the factor matrix of a simplified model is degraded, so that the matrix can be solved with a high speed. |
