Mobile micro-grid system and control method thereof

A mobile micro-grid system, comprising:

• a container, comprising:
• a first DC power system, comprising:
• a first DC bus, delivering a first DC voltage;
• a first input port, selectively connected to a first external power source to receive electricity from the first external power source;
• a first sense circuit, connected to the first input port and provided to detect whether the first external power source is connected to the first input port and detect a voltage value of the first external power source if the first external power source is connected to the first input port;
• a first switch circuit, connected to the first DC bus and the first sense circuit;
• a first output port, selectively connected to a first external load to provide the first DC voltage to the first external load;
• a second sense circuit, connected to the first output port and provided to detect whether the first external load is connected to the first output port;
• and
• a second switch circuit, connected to the first DC bus and the second sense circuit;
• a second DC power system, comprising:
• a second DC bus, delivering a second DC voltage;
• a second input port, selectively connected to a second external power source to receive electricity from the second external power source;
• a third sense circuit, connected to the second input port and provided to detect whether the second external power source is connected to the second input port and detect a voltage value of the second external power source if the second external power source is connected to the second input port;
• a third switch circuit, connected to the second DC bus and the third sense circuit;
• a second output port, selectively connected to a second external load to provide the second DC voltage to the second external load;
• a fourth sense circuit, connected to the second output port and provided to detect whether the second external load is connected to the second output port;
• a fourth switch circuit, connected to the second DC bus and the fourth sense circuit;
• a renewable energy source, coupled to the second DC bus through a fifth switch circuit;
• and
• an energy storage device, coupled to the second DC bus through a sixth switch circuit;
• a three-phase AC power system, comprising:
• a three-phase AC bus, delivering a three-phase AC voltage;
• a third input port, selectively connected to a third external power source to receive electricity from the third external power source;
• a fifth sense circuit, connected to the third input port and provided to detect whether the third external power source is connected to the third input port and detect a voltage value, phase, and frequency of an AC voltage of the third external power source if the third external power source is connected to the third input port;
• a seventh switch circuit, connected to the three-phase AC bus and the fifth sense circuit;
• a third output port, selectively connected to a third external load to provide the three-phase AC voltage to the third external load;
• a sixth sense circuit, connected to the third output port and provided to detect whether the third external load is connected to the third output port;
• and
• an eighth switch circuit, connected to the three-phase AC bus and the sixth sense circuit;
• a single-phase AC power system, comprising:
• a single-phase AC bus, delivering a single-phase AC voltage;
• a fourth input port, selectively connected to a fourth external power source to receive electricity from the fourth external power source;
• a seventh sense circuit, connected to the fourth input port and provided to detect whether the fourth external power source is connected to the fourth input port and detect a voltage value and frequency of an AC voltage of the fourth external power source if the fourth external power source is connected to the fourth input port;
• a ninth switch circuit, connected to the single-phase AC bus and the seventh sense circuit;
• a fourth output port, selectively connected to a fourth external load to provide the single-phase AC voltage to the fourth external load;
• an eighth sense circuit, connected to the fourth output port and provided to detect whether the fourth external load is connected to the fourth output port;
• and
• a tenth switch circuit, connected to the single-phase AC bus and the eighth sense circuit;
• a bidirectional DC/DC converter, coupled to the first DC bus through an eleventh switch circuit, coupled to the second DC bus through a twelfth switch circuit, and provided to make the first DC bus and the second DC bus provide DC electricity to each other based on a DC voltage conversion performed by the bidirectional DC/DC converter;
• a three-phase AC/DC transformer device, coupled to the three-phase AC bus through a thirteenth switch circuit and coupled to the first DC bus through a fourteenth switch circuit;
• a first port, selectively connected to a three-phase AC grid;
• a ninth sense circuit, connected to the first port, coupled to the three-phase AC/DC transformer device through a fifteenth switch circuit, and provided to detect whether the three-phase AC grid is connected to the first port and detect a voltage value, phase, and frequency of an AC voltage of the three-phase AC grid if the three-phase AC grid is connected to the first port;
• a single-phase AC/DC transformer device, coupled to the single-phase AC bus through a sixteenth switch circuit and coupled to the second DC bus through a seventeenth switch circuit;
• a second port, selectively connected to a single-phase AC grid;
• a tenth sense circuit, connected to the second port, coupled to the single-phase AC/DC transformer device through an eighteenth switch circuit, and provided to detect whether the single-phase AC grid is connected to the second port and detect a voltage value and frequency of an AC voltage of the single-phase AC grid if the single-phase AC grid is connected to the second port;
• and
• a control circuit, coupled to the first to eighteenth switch circuits, the first to tenth sense circuits, the first DC bus, the second DC bus, the three-phase AC bus, the single-phase AC bus, the bidirectional DC/DC convertor, the three-phase AC/DC transformer device, the single-phase AC/DC transformer device, the renewable energy source, and the energy storage device;
• wherein the control circuit separately receives detection results of the first to tenth sense circuits and detects voltage values of the first DC bus and the second DC bus, a voltage value, phase, and frequency of an AC voltage of the three-phase AC bus, and a voltage value and frequency of an AC voltage of the single-phase AC bus;
• wherein on/off operations of the first to eighteenth switch circuits are separately controlled by the control circuit;
• wherein operations of the bidirectional DC/DC convertor, the three-phase AC/DC transformer device, the single-phase AC/DC transformer device, the renewable energy source, and the energy storage device are separately controlled by the control circuit;
• wherein the three-phase AC/DC transformer device makes the three-phase AC bus, the first DC bus, and the three-phase AC grid able to provide electricity to each other;
• wherein the single-phase AC/DC transformer device makes the single-phase AC bus, the second DC bus, and the single-phase AC grid able to provide electricity to each other;
• wherein the control circuit controls the first to eighteenth switch circuits, the bidirectional DC/DC convertor, the three-phase AC/DC transformer device, the single-phase AC/DC transformer device, and the renewable energy source to make the renewable energy source work as a primary power supply when the mobile micro-grid system provides electricity to the first external load, the second external load, the third external load, or the fourth external load.