CONTROL DEVICE, COMPUTER-READABLE STORAGE MEDIUM, MODULE-LEVEL POWER ELECTRONICS APPARATUS, NEW ENERGY SYSTEM, POWER CONVERTER, AND CONTROL METHOD FOR POWER CONVERTER

A control device, a computer-readable storage medium, a module-level power electronics apparatus, a new energy system, a power converter, and a control method for a power converter are provided, relating to the technical field of power electronics. The power converter, in a case that the power supply branch connected to the power converter includes at least two power supply strings connected in parallel, regulates a voltage of at least one of the power supply strings, and determines whether input voltages of module-level power electronics apparatuses in the corresponding power supply branch change. For a module-level power electronics apparatus, in normal cases, the input voltage of the module-level power electronics apparatus is constant; and in a case that an input open-circuit fault occurs for the module-level power electronics apparatus, the input voltage of the module-level power electronics apparatus changes due to an inter-string voltage difference between the power supply string where the module-level power electronics apparatus is arranged and other power supply strings connected in parallel to the power supply string. Thus, in a case that an input voltage of a module-level power electronics apparatus changes, it may be determined that an input open-circuit fault occurs for the module-level power electronics apparatus, thereby determining the input open-circuit fault.