Ground transmitting system and method for electromagnetic transmission between well and ground for intelligent drill guiding

A ground transmitting system for electromagnetic transmission between a well and a ground for intelligent drill guiding, comprising:

• a well site power generation device, a ground transmitting device and current transmission ground electrodes, wherein the well site power generation device, the ground transmitting device and the current transmission ground electrodes are connected in sequence;
• the well site power generation device is used for supplying power to the ground transmitting device;
• wherein the well site power generation device comprises a well site diesel generator, the well site diesel generator comprises a first output terminal, a second output terminal and a third output terminal, and the first output terminal, the second output terminal and the third output terminal are respectively connected with the ground transmitting device;
• the ground transmitting device is used for sending generated current waveform to the current transmission ground electrodes through a transformer;
• wherein the ground transmitting device is respectively connected with the well site power generation device and the current transmission ground electrodes, and the ground transmitting device comprises a direct current bus module, an inverter module and a control module, the direct current bus module is connected with the first output terminal, the second output terminal, the third output terminal and the inverter module, and the inverter module is connected with the control module and the current transmission ground electrodes;
• wherein the control module comprises a waveform generator, a controller and a driver;
• the inverter module comprises a first insulated gate bipolar transistor, a second insulated gate bipolar transistor, a third insulated gate bipolar transistor, a fourth insulated gate bipolar transistor, a current sensor and a transformer;
• an transmitting current obtained by the current sensor in the inverter module is compared with the waveform generator to form an error signal, the error signal is input into the controller to obtain four driving signals, the four driving signals form one-to-one control signals corresponding to four insulated gate bipolar transistors through the driver and are connected to gate control terminals of each of the insulated gate bipolar transistors;
• and
• the current transmission ground electrodes are used for sending the current waveform to an underground receiver through a drill pipe and strata to complete a ground transmitting for the electromagnetic transmission between the well and the ground for the drill guiding.