| 摘要 |
PURPOSE:To improve the transient response performance by obtaining a control variable taking a resistor between a system and an inverter into consideration and providing a circuit adding and subtracting the variable crossingly to/from an output of a regulator of an effective/reactive power. CONSTITUTION:A voltage of a DC power supply 11 is converted into an AC voltage with a proper and amplitude by an inverter 12 and the result is fed to a power supply system 15 via a transformer 13 and a reactor 14 in a non- interference control system of the effective/reactive power. The control circuit section consists of a current regulator 1, a vector operator 2, a voltage/current detector 3 and subtractors/adders 5-7. The in-phase component Vd of the inverter voltage Vi and the system voltage Vs is obtained by adding (6) an output of a regulator 12 and a value multiplying with an output of a regulator 11 at an amplifier 41 and adding (7) further the system voltage Vs to the result, and the orthogonal component Vq is obtained similarly by subtraction 5. Thus, in changing the effective (reactive) power, both the said Vd, Vq are changed ad they are controlled without interruption even if a resistive component exists. |
