| 摘要 |
PURPOSE: To make it possible to siginificantly suppress hunting in the output voltage of a distributed power supply, by setting for interconnection point voltage an upper limit voltage, at which voltage suppressing operation is started, and a lower limit voltage, at which voltage suppressing operation is ended. CONSTITUTION: When a distributed power supply 5 is not fully charged, the voltage of an interconnection point is reduced by the amount equal to the voltage drop. When interconnection is performed and resultant output is supplied to a load 4, the interconnection point voltage is increased. This increase in voltage causes an inverter 7 to generate capacitive reactive power. It is fed to the reactance of distribution line impedance 3 to suppress the interconnection point voltage. For the purpose a lower limit value is previously set under the upper limit value of interconnection point voltage. Capacitive reactive power is supplied until the interconnection point voltage reaches the lower limit value. When the lower limit value is reached, the operation is returned to a normal state to output maximum power with a power factor of 100%. This enables suppression of hunting in the output power of a distributed power supply 5. |
