Novel direct current side hybrid breaking dual protection device of electric power system

The utility model relates to a direct current side hybrid breaking dual protection device of a novel power system, which comprises an automatic breaking tripping device and a fuse in a circuit, the tripping device is respectively connected with a PV photovoltaic group string and a DC/DC converter, the DC/DC converter is connected with a DC/AC inverter, the fuse can be arranged between the DC/DC converter and the DC/AC inverter, and the DC side hybrid breaking dual protection device is connected with the DC/DC inverter. A direct current circuit branch where the PV photovoltaic group string is located and a branch where the DSP controller is located are connected with a current and voltage detection device, and a branch where the direct current side bus and the DSP controller are located is connected with a bus voltage detection device. According to the automatic breaking and tripping device, the DC/DC converter, the DC/AC inverter and the rear-end power grid are protected through the DSP controller, the automa