Voltage fluctuation suppressing apparatus

摘要

According to an embodiment, a voltage fluctuation suppressing apparatus is provided with a power storage device connected to an electric power system, a basic control unit to control an output of the power storage device, a voltage detector to measure a voltage of a connection point to the electric power system, and an output control unit to divide a control amount to be outputted to the basic control unit into a reactive power command value and an active power command value and to output them. The output control unit is provided with a reactive power upper limit value calculation unit, a reactive power calculation/output unit, and an active power calculation/output unit.

主权项

1. A voltage fluctuation suppressing apparatus comprising:
a power storage device configured to be connected to an electric power system; a basic control unit configured to control an output of the power storage device; a voltage detector configured to measure a voltage of a connection point to the electric power system; and an output control unit configured to receive an output of the voltage detector as an input, to divide a control amount to be outputted to the basic control unit into a reactive power command value and an active power command value, and to output the reactive power command value and the active power command value; the output control unit including, a reactive power upper limit value calculation unit to calculate an upper limit value of the reactive power command value, based on an inputted optional power factor command value, a reactive power calculation/output unit to calculate and output the reactive power command value, based on an inputted optional voltage command value, and an active power calculation/output unit to calculate and output the active power command value, which outputs 0 as the active power command value, when an absolute value of a control value to be outputted to the basic control unit is not more than an absolute value of the upper limit value of the reactive power command value, and outputs a value that is calculated from a prescribed expression and is not 0 as the active power command value, when the absolute value of the control value exceeds the absolute value of the upper limit value of the reactive power command value.