Circuit structure and fault processing method and device thereof

The invention provides a circuit structure and a fault processing method and device thereof. The circuit structure comprises a plurality of branches connected in parallel, and each branch comprises aconverter, a bus sub-section and a contactor; the plurality of converters realize grid-connected output power supply through a contactor bus, and each bus sub-section and the contactor bus form an alternating current bus of the circuit structure. In response to the fact that each converter reports a short-circuit fault during grid-connected output power supply, the fault processing method providedby the invention checks the specific position of the short-circuit fault under the condition of ensuring grid-connected output power supply as much as possible in a mode of restarting the converter,sending an operation instruction to the converter and performing comprehensive judgment, ensures that the circuit structure can continuously output power supply, reduces the influence on a rear-end load caused by short circuit,