Power Supply System

摘要

A power supply system comprises: a second electric power converter that converts power discharged by electric power storage means to AC power and that converts charging power to the electric power storage means to DC power; a second current detector that detects the current that is output from the second electric power converter; an electric characteristic computation section that calculates the output current IGref and the electrical output torque Te of a virtual power generator, based on the voltage VT, angular frequency ω and voltage set value Vref of a first electric power converter and the second electric power converter, and their connection point (point a) with the power system; a rotor speed computation section.

主权项

1. A power supply system comprising:
electric power storage means; a second electric power converter that converts power discharged by said electric power storage means to AC power and that converts charging power to said electric power storage means to DC power; a second current detector that detects a current that is output from said second electric power converter; a first electric power converter that converts DC power to AC power and supplies said AC power; an electric characteristic computation section that calculates an output current and an electrical output torque of a virtual power generator, based on a voltage, angular frequency and voltage set value of a connection point between said second electric power converter and said power supply system; a rotor speed computation section that calculates said angular frequency of said virtual power generator, based on said electrical output torque of said virtual power generator calculated by said electrical characteristic computation section and an output target value for active power; and a second power conversion controller that controls said second electric power converter in accordance with a difference of a current that is output to said power system from said first electric power converter and an output current of said virtual power generator.