Calculation manner of the active power regarding the condenser, measuring method and condenser selection manner of the active power which the condenser consumes, seeking the terminal temperature of the condenser in the calculation device of the active power regarding the condenser and

摘要

PROBLEM TO BE SOLVED: To provide an effective power calculation method which can obtain practically an effective power consumed by a capacitor based on an electrostatic capacity, a dielectric dispersion factor and a waveform of a periodic voltage of the capacitor.;SOLUTION: The wave form of the periodic voltage V (t) applied to the capacitor is set in step S1, a requested electrostatic capacity of the capacitor is input in step S2, the periodic voltage V (t) applied to the capacitor terminals is transformed by Fourier method in step S5, that is, the periodic voltage V (t) is transformed by Fourier method into a sine wave and cosine wave series of a higher-order frequency component. In step S6, the effective power Pe consumed by the capacitor is calculated, in this case, the temperature characteristics of the electrostatic capacity and the dielectric dispersion factor of the capacitor are utilized and the characteristics of the voltage and the frequency of the capacitor are used.;COPYRIGHT: (C)2004,JPO&NCIPI