Generator and grid power grid-connected device

The utility model relates to a generator and grid power grid-connected device which is suitable for adjusting the frequency voltage of a generator to be consistent with grid power, the generator and the grid power supply jointly supply power, and the operation requirement of a drilling machine is met. A current transformer is arranged to detect current. The voltage transformer is arranged to detect the voltage. The voltage regulator is arranged to regulate the voltage value output by the generator. A control power supply unit is arranged to supply power to the speed regulator and the controller. And the power generation cabinet controls the generator to output electric energy and access the network. And under the condition that the voltage, frequency, phase and phase sequence are the same as those of the grid electricity and the power cable, the power generation cabinet allows the generator to be connected to the grid. The frequency output by the generator is adjusted through the speed regulator, the voltage