Fast acting mppt controller for solar pv with energy management for dc microgrid

Abstract

In this paper, a new control technique is proposed to achieve a “fast acting Maximum Power Point Tracking (MPPT) Technique for solar photovoltaic system under fast varying solar radiation”with energy management for DC Microgrid. “Conventional MPPT techniques in PV systems fail to track maximum power point (MPP) under fast varying of sunlight levels. In the proposed MPPT algorithm a fine tuned duty cycle for a DC-DC converter is achieved to avoid the divergence of MPP and energy management is achieved by dividing the DC bus voltage into seven ranges by six critical voltage values which are employed as the represents of power states, and according to the range which the bus voltage belongs to, the operation mode of the system can be automatically judged and switched freely”. “A hybrid energy storage system in this microgrid that contains two” complementary type storage elements battery and super-capacitor, can enhance the “reliability and flexibility of the system based on their special supply logical. The effectiveness of the proposed PV-MPPT system with energy management is demonstrated via case studies and simulation results shows the effective” performance of the fast acting MPPT technique in achieving efficient MPP.