| 摘要 |
<P>PROBLEM TO BE SOLVED: To ensure stability in a control system by improving the transition response characteristics of cross current suppression control. <P>SOLUTION: A power conversion system is provided with inverter reactive power conversion sections 40a, 40b for calculating the reactive power of inverters 10a, 10b, based on the output current and voltage of the plurality of inverters 10a, 10b connected in parallel; load reactive power conversion sections 50a, 50b for calculating the reactive power of a load 20 based on the output voltage and load current of the inverters 10a, 10b; reactive power control sections 60a, 60b for calculating the difference to the reactive power of the inverters 10a, 10b by dividing the reactive power of the load 20 by the number of inverters; and voltage control sections 70a, 70b for controlling the voltage amplitude, based on the difference between the reactive power of the load 20 and that of the inverters 10a, 10b. The power conversion system also has current minor loop sections 80a, 80b for performing the three-phase biphase conversion of the output current of the inverters 10a, 10b, calculating a current amplitude component from the two-phase AC signal as the amount of DC, and subtracting it from the output of the reactive power control sections 60a, 60b. <P>COPYRIGHT: (C)2008,JPO&INPIT |
