Switching method, system and device of bidirectional inverter and readable storage medium

Abstract

The invention discloses a switching method of a bidirectional inverter. The bidirectional inverter is connected with a power grid, a load and a power supply battery; and when the voltage of the power grid is normal, the load is powered by the voltage of the power grid, the battery is charged by the power grid at the same time. The switching method of the bidirectional inverter comprises the following steps of: detecting the voltage of the power grid in real time, extracting a voltage parameter of the power grid, and obtaining a battery conversion alternating-current voltage parameter according to the voltage parameter of the power grid; under the condition that the voltage of the power grid is abnormal, converting the direct-current voltage output by the power supply battery into a battery conversion alternating-current voltage at the abnormal moment, and switching the load from being powered by the power grid to being powered by the battery conversion alternating-current voltage; and obtaining a preset alternating-current voltage, taking the preset alternating-current voltage as a battery conversion alternating-current voltage tracking target, and adjusting the battery conversion alternating-current voltage to be consistent with the preset alternating-current voltage. According to the method, the voltage of the power grid is detected and tracked in real time, and the alternating voltage consistent with the voltage of the power grid when the power grid is abnormal is output, so that the voltage is smoothly changed without impact during the switching period of the bidirectional inverter.

Description

technical field [0001] The invention relates to the field of inverter control, in particular to a switching method, system, device and readable storage medium of a bidirectional inverter. Background technique [0002] An inverter is a device that converts DC to AC to supply power to a load. When the grid condition is stable, the existing inverter can directly take power from the grid to supply power to the load, and at the same time, the inverter module can convert the three-phase alternating current of the grid into direct current to charge the battery. When the battery is switched from the charging state to the discharging state, it is necessary to turn off the inverter for corresponding operations and then turn on the inverter to realize the battery inverter power supply and continue to supply power to the load. [0003] However, when the load has relatively high requirements on power supply and needs continuous power supply, the existing inverter cannot meet the demand ...

AI Technical Summary

Problems solved by technology

The intermittent switching between charging and discharging of the inverter battery cannot meet the continuous power supply requirements of the load and brings great inconvenience to the user's operation.

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