BOOST-BUCK cascade type photovoltaic energy storage circuit and control system

The invention discloses a BOOST-BUCK cascade type photovoltaic energy storage circuit and a control system, the photovoltaic energy storage circuit comprises a photovoltaic cell, a BOOST circuit, a buffer capacitor, a BUCK circuit, an energy storage cell, a first adjusting circuit, a second adjusting circuit, a first control circuit and a second control circuit, the BOOST circuit is used for realizing MPPT control of the output power of the photovoltaic cell; the buffer capacitor is used for completing a coordination buffer function of energy and inhibiting an out-of-control phenomenon of MPPT control of the BOOST circuit; the BUCK circuit is used for being matched with the BOOST circuit to work so as to ensure MPPT output of the whole process of the photovoltaic cell; the first control circuit is used for completing the control of the BOOST circuit and the comprehensive digital control function of the whole system; and the second control circuit is used for completing the control function of the BUCK circuit