Control method for power control system, power control system, and power control apparatus

A power control system comprising:

• a power generation apparatus configured to generate, while a current sensor detects forward power flow equal to or greater than a threshold, power corresponding to a value detected by the current sensor;
• a power control apparatus configured to control distributed power sources including the power generation apparatus;
• and
• a dummy current output unit connected to the power control apparatus, the dummy current output unit capable of supplying the current sensor with dummy current that is current in a same direction as forward power flow;
• wherein
• the power control apparatus comprises a controller and a memory;
• and
• in a state of constant current flowing to a load from the power generation apparatus and the power control apparatus for a predetermined time,
• the controller increases the dummy current stepwise and stores, in the memory as the threshold, a minimum of the forward power flow when output voltage of the power generation apparatus rises.

A power control apparatus configured to control distributed power sources that include a power generation apparatus that generates power while a current sensor detects forward power flow equal to or greater than a threshold;

• the power control apparatus being connected to a dummy current output unit capable of supplying the current sensor with dummy current that is current in a same direction as forward power flow;
• the power control apparatus comprising a controller and a memory;
• wherein
• in a state of constant current flowing to a load from the power generation apparatus and the power control apparatus for a predetermined time,
• the controller increases the dummy current from the dummy current output unit stepwise and stores, in the memory as the threshold, a minimum of the forward power flow when output voltage of the power generation apparatus rises.