A decoupling control method for inverters in parallel operation

A novel load balance control method for redundant parallel inverters is proposed witch is realized through a two-line share bus connecting all the paralleled inverters without extra control modules, no matter how many modules are in parallel. The synchronization control of voltage reference is decoupled from current sharing control by local feedback, not like the existing methods in which the voltage reference of each inverter is adjusted according to the current deviation. As a result the fast dynamic response to stepping load and input achieved. System configuration and operation principle are presented. And experimental results are given in the end.