| 摘要 |
PURPOSE:To perform an inverter control system having conformity by composing a control system for regulating power supplied from an inverter to a power system separately from a PLL circuit. CONSTITUTION:A PLL circuit is formed in a closed loop of a phase difference detector 11, a VCO14, and frequency dividers 16a, 16b, an angle unit corresponding to a system voltage period is used as a clock signal (f), and output as a timing signal (j) of an inverter output. The output voltage command signal (n) of the inverter is converted by a ROM20 to obtain a switching phase command, which is compared by a comparator 19b with the output (k) of an up-down counter 18 to produce a pulse pattern (p). The pattern (p) and a basic pattern (q) are combined by a pulse generator 21 to obtain a pulse train (g). The pattern (q) is obtained by dividing the output (m) of the comparator 19a by a frequency divider 16c. Thus, when the output voltage of the inverter is controlled, it can be varied by a command signal (n) to control the effective/reactive power supplied to a power source system. |
