Patent ID: 7439635

Claim:
An output suppressing method of a plurality of dispersed power sources comprising: gradually suppressing an output of a dispersed power source when a determination is made, at an exceeding power source of the plurality of dispersed power sources, that a voltage at a power receiving point of the exceeding power source among the plurality of dispersed power sources exceeds an upper limit of a proper value, the power receiving point being linked to a high-voltage-to-low-voltage transformer of a commercial power system; in response to the determination, further gradually suppressing outputs of the other dispersed power sources of which the voltages at power receiving points do not exceed the upper limit of the proper value; canceling by itself an output suppression of the dispersed power source of which the voltage at the power receiving point has exceeded the upper limit of the proper value when the voltage at the power receiving point of the dispersed power source becomes equal to or lower than the upper limit of the proper value; and then further canceling an output suppression of the other dispersed power sources of which the voltages at the power receiving points do not exceed the upper limit of the proper value.