| 摘要 |
PURPOSE:To simply and stably control a power factor by connecting two self- excited inverters which are connected in parallel with a DC power source in parallel with a commercial power source system through a coupling reactor. CONSTITUTION:A power instructed value Psoll set by a power setter 4 is converted with a suitable current instruction value by the coefficient of a coefficient unit 13, is multiplied by the detected voltage detected and unified at an instantaneous value, thereby calculating the desired current vector. This current vector is further rotated by a phase unit 15 at 90 deg., is multiplied by a coefficient unit 16 by the coefficient corresponding to the reactance of a coupling reactor, thereby calculating the reactance voltage drop vector, the reactance and the system voltage are added, thereby calculating the phase of the power vector. |
