THE STUDY AND ANALYSIS OF MPPT CONTROLLER FOR SRBC

This work is about designing Maximum Power Point Tracker (MPPT) with
Synchronous Rectifier Buck Converter (SRBC) circuit where the main purpose is to improve
the performance and increase the output voltage and current. The MPPT controller
controls the output current of the input (usually solar array) so that the output power
converges on the maximum based on the linearity between the maximum output
power and the optimal current. In this work, MPPT' s characteristics, performance,
operation modes, advantages, and disadvantages are analyzed and observed. Then,
combination ofMPPT and adaptive gate drive (AGD) will be applied to SRBC as the
output circuit. PSPICE software is used in designing and simulating both circuits. The
comparison is carried out based on the average output voltage and current, node
voltage, output ripple voltage and current, gate-to-source voltage, and body diode
conduction loss of the MPPT circuit and MPPT with AGD circuit. The details are
discussed thoroughly that include limitations and advantages in the design of the controllers
using I MHz switching frequency. It is found that by implementing MPPT controller
with SRBC, the output voltage and output current have increased by approximately
12%- 13% for both CCM and DCM conditions. Besides that, it also reduces output
voltage ripple and current around 70 % for CCM mode. However, in DCM condition,
the output peak-to-peak ripple for both voltage and current have increased by 20 %.