Optimal power collection control method and apparatus in solar photovoltaic power generation system

An optimal output collection control apparatus in a solar photovoltaic power generation system for stably harvesting power from a solar photovoltaic panel having varying output, comprising

• a control apparatus that comprises a DC-DC converter including a switching regulator driven at a switching frequency through pulse frequency modulation control) and pulse width modulation control, and controls an optimizer for stepping up a DC input voltage from the solar photovoltaic panel to a predetermined DC high voltage and converting the stepped-up DC voltage into a grid connection voltage,
• wherein the control apparatus includes a microprocessor, a sensor group, and a MOS driver group,
• the microprocessor is configured by connecting a control logic unit, a maximum output power point tracking control unit (MPPT control unit), a PWM control unit, a PFM control unit, an I/O port, a timer control unit that controls operation time of the control apparatus, and an initial measurement unit to each other through a bus line,
• the sensor group includes a solar photovoltaic panel voltage detection circuit, a solar photovoltaic panel current detection circuit, an optimizer output voltage detection circuit, and an optimizer output current detection unit, and
• the MOS driver group includes a plurality of high-side MOS drivers and a plurality of low-side MOS drivers that generate gate signals for turning on and off a power MOS switching transistor group connected to an I/O port included in the microprocessor to constitute the optimizer, and
• supplies, through the I/O port, the gate signal that is generated by operation in the control logic unit based on detection output of the sensor group and turns on and off the switching transistors of the MOS driver group constituting the optimizer.