Photovoltaic inverter backflow prevention system

The utility model discloses a photovoltaic inverter backflow prevention system, and pertains to the technical field of solar photovoltaic power generation. The photovoltaic inverter backflow prevention system comprises one or more photovoltaic inverters, a backflow prevention device, a voltage/current sensor and a first circuit breaker. The backflow prevention device comprises a controller, a contactor, a second circuit breaker and a human-computer interaction unit. The photovoltaic inverters are in bidirectional real-time communication connection with the controller of the backflow prevention device, the output end of the controller is connected with the input end of the contactor coil, the human-computer interaction unit is in bidirectional connection with the controller, and the sensing signal output end of the voltage/current sensor is connected with the input end of the controller for monitoring the voltage and current signals at the power grid distribution transformer low-voltage outlet side.