POWER SUPPLY SYSTEM, POWER SUPPLY METHOD, CONTROL APPARATUS, AND COMPUTER STORAGE MEDIUM

This application provides a power supply system, a power supply method, a control apparatus, and a computer storage medium, which have high power supply efficiency, high loading capability, and little pollution to a harmonic current and a reactive current in a power grid, and do not require an additional component. The power supply system includes a plurality of parallelly-connected uninterruptible power supplies UPSs, and each UPS collects a first current of the UPS within a collection period in a first duration. In a current equalization period in the first duration, a direct current to alternating current conversion module is controlled to output a first compensation current, where the first compensation current includes a first compensation reactive current component and/or a first quantity of first compensation harmonic components; one first compensation reactive current component in the first quantity of first compensation harmonic components and one harmonic component of the first current have a same frequency and opposite amplitudes; the first compensation reactive current component and the reactive current component have a same frequency and opposite amplitudes. A duration in which a bypass switch module connects a power grid to a load is adjusted, where the current equalization period does not completely overlap the collection period.