High-performance solar photovoltaic (PV) energy conversion system

A high-performance solar photovoltaic (PV) energy conversion system, comprising:

• a solar panel, for absorbing Sun radiation and making photovoltaic conversion to produce electricity;
• a high-boost ratio DC/DC conversion circuit, converting low DC electricity to high voltage DC electricity, and outputting to a high voltage bus bar, the high-boost ratio DC/DC conversion circuit comprising:
• a first winding circuit comprising a power semiconductor switch and a first winding of a coupling inductor, the polar terminal of the first winding of a coupling inductor being defined as connecting to the positive post of the DC input circuit,
• a passive regenerative snubber circuit comprising a clamping diode, a discharging diode and a clamping capacitor,
• a second winding circuit comprising a high voltage capacitor and a second winding of the coupling inductor, the polar terminal of the second winding of the coupling inductor being defined as connecting to the high voltage capacitor, and
• a filter circuit comprising a filter capacitor and a rectification diode;
• a system controller, containing a microprocessor and a drive circuit, responsible for system control;
• a full-bridge inverter comprising, four power semiconductors switches, connects to the high voltage bus bar, controlled by the system controller to be used in converting DC voltage to AC voltage;
• a clamping inductor, connecting between the full-bridge inverter and utility-grid, used for filtering high frequency components in the output voltage of the inverter, and converting AC voltage output to AC current output;
• and
• a driving device, a low power motor to support and drive the solar panel, and controlled by the system controller to change surface angle of the solar pane, wherein said microprocessor executes a total sliding mode control strategy, a sun tracking strategy and an adaptive step-perturbation method;
• establishes Sinusoidal Pulse-Width-Modulation output module, outputting Pulse-Width-Modulation signal;
• and through the inverter drive circuit drives the power semiconductor switch of the full-bridge inverter to control the output current of the inverter.