| 摘要 |
PROBLEM TO BE SOLVED: To surely restrain magnetic deflection of a transformer which is caused by abnormality of power system. SOLUTION: In this control equipment of an interconnected power converting system, a power converter 1 has a power storing device 7 and converts DC to AC or converts AC to DC and is connected in parallel with a power system load 8 having a power source O via a transformer 2. An system interconnection switch 9 which can cut off the load 8 and the power converter 1 from the power system is installed at a point interconnected with the power system. At the normal time, power is stored in the power storing device 7 from a power system side, and power is discharged from the power storing device 7. When abnormality is generated in the power system, power is supplied to the load 8 from the power converter 1 by opening the system interconnection switch 9. In the control equipment, a means is installed which restrains the magnitude of output of only one shaft component out of shaft component identical to power source voltage component of a current controller, on rotational coordinates which rotates synchronously withy a power source voltage of a power system and shaft component perpendicular to a shaft of the current controller, and the means determines an output voltage of the power converter 1, in the case that the interconnected system is maintained by closing the system interconnection switch. |
