POWER QUALITY GRADE DETERMINATION METHOD AND APPARATUS IN POWER GRID, DEVICE AND STORAGE MEDIUM

The present application relates to a power quality level determining method and apparatus for a power grid, a device, and a storage medium. The method includes: obtaining a harmonic current to be compensated and a harmonic voltage to be compensated in a power grid; performing a compensation processing on the harmonic current to be compensated according to a compared result of the harmonic current to be compensated and an actual compensating current, to obtain an adjusted harmonic current, where, the actual compensating current comprises an actual output current of a current adjusting inverter; performing a compensation processing on a harmonic voltage to be compensated according to the harmonic voltage to be compensated and a pre-obtained object switch actuation duration, to obtain an adjusted harmonic voltage, where, the object switch actuation duration comprises a duration when a plurality of groups of power switch devices in an active power filter are controlled to be turned on or off; and determining an object power quality level for the power grid according to the adjusted harmonic current and the adjusted harmonic voltage. The method can improve compensation accuracy of the harmonic voltage and harmonic current in the power grid.