Liu Baoquan, Zhang Haoming, Li Haoxuan, et al. MPPT RIPPLE SUPPRESSION METHOD FOR PHOTOVOLTAIC-STORAGE DC/DC CONVERTER UNDER INVERTER LOAD[J]. 2025, 46(3): 384-393.
Liu Baoquan, Zhang Haoming, Li Haoxuan, et al. MPPT RIPPLE SUPPRESSION METHOD FOR PHOTOVOLTAIC-STORAGE DC/DC CONVERTER UNDER INVERTER LOAD[J]. 2025, 46(3): 384-393. DOI: 10.19912/j.0254-0096.tynxb.2023-1874.
MPPT RIPPLE SUPPRESSION METHOD FOR PHOTOVOLTAIC-STORAGE DC/DC CONVERTER UNDER INVERTER LOAD
This paper introduces a novel control method to address maximum power point tracking (MPPT) ripple in photovoltaic-storage DC/DC converter under inverter load. The double-line frequency of the battery voltage pulsation and the resulting dynamic mode switching of system is the main cause of MPPT ripple. Firstly
the effect of battery’s equivalent parameters under inverter load on DC bus voltage pulsation is analysed based on the Thevenin equivalent model
and a back gain model incorporating the battery’s equivalent parameters of DC/DC converter is established. Additionally
a feedforward method is proposed for suppressing bus voltage pulsation. Furthermore
an analysis is conducted to identify the causes of dynamic mode switching induced by inverter loads based on the relationship between MPPT charging mode and constant voltage-constant current charging mode. A load identification algorithm is proposed to avoid dynamic mode switching
by using a time window to detect bus voltage pulsation as an additional loop switching criterion. Finally
simulation and experimental results show that the proposed combined method can effectively reduce MPPT ripple in the photovoltaic-storage DC/DC converter under inverter load.
ERTASGIN G, WHALEY D M, ERTUGRUL N, et al.Energy storage element sizing for single-phase grid-connected photovoltaic converter[C]//2014 16th International Power Electronics and Motion Control Conference and Exposition. Antalya, Turkey, 2014: 1005-1010.
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