Double closed loop control method for photovoltaic Boost convertor of photovoltaic energy storage system

The invention discloses a double closed loop control method for a photovoltaic Boost convertor of a photovoltaic energy storage system. When the photovoltaic Boost convertor is in the working state of constant current power supply, the output end of the photovoltaic Boost convertor collects a current signal and a voltage signal and feeds the signals back to a current loop PI adjuster of the photovoltaic Boost convertor. According to the control method, an outer ring is a Boost circuit output voltage ring, so that wave form of output voltage is changed, and stability precision and anti-interference performance are improved; an inner ring is a Boost circuit inductive current ring, so that the dynamic property of the system is improved. By means of the whole control method, stable direct current bus voltage can be obtained. Compared with an MPPT control strategy of an existing photovoltaic side Boost convertor, the whole photovoltaic energy storage system can be stably controlled, and control complexity of the whole system is reduced at the same time.