Fault detection method and device of parallel inverter system, electronic equipment and medium

The invention provides a fault detection method and device of a parallel inverter system, electronic equipment and a medium, the parallel inverter system comprises a first inverter and a second inverter, the method is applied to the first inverter, and the specific execution process of the fault detection method of the parallel inverter system is as follows: obtaining first signal information of a local machine, and second signal information of a second inverter; wherein the first signal information and the second signal information are determined based on a synchronization signal sent by the parallel inverter system at a preset sending time interval. In response to determining that the first signal information is in the first state and the second signal information is in the second state, determining that the local machine has a first fault signal; and in response to determining that the first signal information is in the first state and the second signal information is in the first state, determining that t