Basic unit for power converter, power converter, and universal power interface

A universal power interface, wherein the universal power interface is used for a power converter, wherein the power converter comprises a basic unit, the basic unit comprising:

• an inductor, a power half-bridge, a first terminal, a second terminal, a third terminal, and a fourth terminal, wherein an end of the inductor is connected to a midpoint of the power half-bridge, and another end of the inductor is connected to the first terminal;
• a source terminal of a lower bridge arm of the power half-bridge is connected to the second terminal and the fourth terminal, and a drain terminal of an upper bridge arm of the power half-bridge is connected to the third terminal, wherein there are 3 to 6N basic units in the power converter, wherein N is an integer greater than 1;
• the third terminals of all the basic units in the power converter are connected to a first terminal of an output capacitor and a positive terminal of a direct current (DC) bus, and the fourth terminals of all the basic units in the power converter are connected to a second terminal of the output capacitor and a negative terminal of the DC bus, the power converter is used for DC step-up or DC step-down, a first terminal of each basic unit in the power converter is connected to a positive terminal of a DC source, and a second terminal of each basic unit in the power converter is connected to a negative terminal of the DC source;
• or a first terminal of each basic unit in the power converter is connected to a positive terminal of a DC load, and a second terminal of each basic unit in the power converter is connected to a negative terminal of the DC load,
• wherein the power converter is connected to a load or an energy source in a microgrid through the universal power interface, wherein
• the universal power interface comprises a first power interface and a second power interface, the first power interface comprises 6N first terminals and 6N second terminals, the second power interface comprises 6N third terminals and 6N fourth terminals, the 6N first terminals of the first power interface are connected to the 6N third terminals of the second power interface in a one-to-one correspondence, and the 6N second terminals of the first power interface are connected to the 6N fourth terminals of the second power interface in a one-to-one correspondence, wherein N is an integer greater than 0;
• first terminals of all basic units in the power converter are connected to a plurality of first terminals of the first power interface in a one-to-one correspondence, and second terminals of all the basic units in the power converter are connected to a plurality of second terminals of the first power interface in a one-to-one correspondence;
• and
• the load or the energy source in the microgrid is connected to the second power interface.