| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To connect a load in a lower-order system viewed from an observation point to a system reactance in series behind a fixed admittance, to assume a first load model having a fixed impedance load and an induction machine load parallel-connected behind it, and to accurately obtain the induction machine inertial constant and the induction machine ratio. <P>SOLUTION: A method includes a step of obtaining the value of the system reactance from a load model which is different from the first load model and observation data; a step of calculating the voltage value behind the system reactance from the value of the system reactance, the observation data and the first load model, and representing active power and reactive power at the observation point, based on active/reactive power simulation functions of the first load model for considering the induction machine ratio and the induction machine inertial constant as the unknown quantity, by utilizing the calculated voltage value and the observation data; and a step of making the active/reactive power observation data and the active/reactive power simulation functions fluctuate at the observation point with an unknown quantity, comparing square errors, and determining the value for which the square error becomes a minimum as the induction machine ratio and the induction machine inertial constant. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
