Improper wiring detecting system of parallel inverter system

摘要

An improper wiring detecting system of a parallel inverter system can include two polyphase inverters connected in parallel, and voltage detectors to detect an output voltage of each of the phases of each of the inverters. Control units can control turning-on and -off of semiconductor switching devices of the inverters, and a wiring condition deciding means can operate at least one control unit to turn-on specified switching devices in at least one inverter to form a closed circuit between arbitrary two phases of the at least one inverter. The system can carry out comparisons among values of output voltages of the two inverters corresponding to respective phases and detected by the voltage detectors, and make a decision as to whether wiring is correct or not on the basis of the results of the comparisons.

主权项

1. A system, comprising:
a first inverter configured to output polyphase electric power; a second inverter, coupled to the first inverter, and configured to output polyphase electric power; and an evaluation device configured to determine a condition of the system by comparing respective output voltages of the first inverter and the second inverter for each of corresponding phases and to decide based on the comparing whether wiring of the system is correct or not.