Method of determining current sharing reactor value in current converter composed of multiple power modules in parallel connection

The invention discloses a method of determining the current sharing reactor value in a converter composed of multiple power modules in parallel connection, comprising the steps of: 1) establishing a current sharing equivalent model when a current sharing reactor is connected between two parallel power modules, and reaches current sharing, and obtaining the relation between a current sharing reactor value and the voltage difference and circulating current between the two power modules by the current sharing equivalent model; and 2) respectively obtaining the output voltage and output current of two target power modules in connection with the current sharing reactor to be determined in a current converter, calculating a voltage difference and circulating current, and determining a corresponding reactor value according to the relation obtained in step 1). The method is easy to realize, and can directly determine the current sharing reactor value required by each power module in a current converter when reaching current sharing current, and obtain highly accurate current sharing reactor values.