Control processing method for inverter device having H5 topological structure

A multi-mode inverter system configured to couple to a PV unit at its input, and coupled to an AC power source at its output, comprising:

• a capacitive energy source configured to couple to the PV unit;
• a conversion circuit having an input coupled to the capacitive energy source, and having an output, wherein the conversion circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, and a fifth transistor coupled together to form an H5 topological structure;
• a switching network comprising a first switch, a second switch, and a third switch connected in series with one another between the output of the conversion circuit and the AC power source, wherein the first switch is coupled to the output of the conversion circuit and the third switch is coupled to the AC power source, and the second switch is coupled between the first switch and the third switch at a first node and a second node, respectively;
• a switch circuit configured to control the switching network based on a condition associated with the AC power source;
• a first load connected to the second node between the second and third switches;
• a second load connected via a fourth switch to the first node between the first and second switches,
• wherein the switch circuit is configured to control the first, second, third and fourth switches based on the condition associated with the AC power source to achieve three distinct modes of operation in which one or both of the first and second loads receive power,
• wherein the three distinct modes of operation comprise a first control mode comprising a grid-connected power generation mode, a second control mode comprising an off-grid power generation mode, and a third control mode comprising a Solar Power from Space (SPS) power generation mode,
• wherein in the SPS power generation mode, the fifth transistor in the H5 topological structure of the conversion circuit is controlled in a sine PWM mode when an illumination intensity satisfies a first illumination criteria, and is controlled in a direct working mode that is different than the sine PWM mode when the illumination intensity satisfies a second, different illumination criteria.