Communication method suitable for low-voltage flexible mutual aid equipment

The invention relates to the technical field of low-voltage power distribution networks, and discloses a communication method suitable for low-voltage flexible mutual aid equipment, which comprises the following steps: rectifying equipment generates a characteristic current injection communication signal; the rectification device calculates a characteristic voltage P1 generated by the characteristic current on the DC bus; the rectification equipment samples the direct-current bus voltage; the influence of the P1 is eliminated when the rectification equipment carries out direct current bus voltage control; the inversion equipment samples the voltage of the direct-current bus and calculates a characteristic voltage A1; if A1 is greater than a threshold value A2, the inversion equipment receives a communication signal, and the next step is skipped to; otherwise, the inversion equipment does not receive the communication signal, and the equipment is shut down; and the influence of A1 is eliminated when the invers