A fast MPPT algorithm for single-stage grid-connected PV inverter

作者：Gu Junyin^*; Chen Guocheng

来源：Acta Energiae Solaris Sinica, 2014, 35(1): 154-160.

• Capacitor voltages
• Dynamic process
• Grid-connected PV inverters
• Mathematical reasoning
• MPPT
• Mppt algorithms
• Power coupling
• Sliding modes

The power coupling relationship amongst PV array, filtering capacitor, and grid-connected PV inverter was investigated. The P-V curve was categorized into 3 sections, i.e the unstable area, the stable area, and the sliding-mode stable area. Through theoretical analysis and mathematical reasoning, the periodic power coupling can be reflected by the capacitor voltage and its change in monotony. Based on the power de-coupling of the capacitor in a power cycle by calculating out precisely the required power reference for the inverter in the coming cycle, MPPT process was optimized. The proposed method is especially efficient during MPPT dynamic process, for example during start-up and sharp change in solar radiation. An experimental 180W prototype is designed for verification of theorectical analysis.

• 出版日期2014
• 单位上海大学