Design Analysis of DC-DC Converters Connected to a Photovoltaic Generator and Controlled by MPPT for Optimal Energy Transfer throughout a Clear Day

Abstract

The DC-DC converters are widely used in photovoltaic generating systems as an interface between PV module and the load. These converters must be chosen to be able to match the maximum power point (MPP) of PV module when climatic conditions change with different resistive load values. So DC-DC converters must be used with MPPT controller in order to reduce losses in the global PV system. This article focuses on the effect of climatic conditions on design of two components (inductance, capacitance) for three topologies of DC-DC converters commonly used in PV systems. When climatic conditions change, the boundary of inductance and capacitance parameters of DC-DC converter will change. These two parameters must be properly sized to achieve optimal efficiency for each converter. The design optimization is based on two principles: 1) for a steady-state operation in a continuous conduction mode, the inductance value for all choppers must be greater than the maximum value of boundary inductance, and 2) in order to limit the output voltage ripple of DC-DC converter below a desired value, the filter capacitance must be larger than the maximum value of boundary capacitance.

Semitransparent Energy‐Storing Functional Photovoltaics Monolithically Integrated with Electrochromic Supercapacitors

“…Finally, the energy conversion and storage efficiency (ECSE) of 1.36% is calculated from the ratio of stored energy (≈0.553 mJ) and received light energy (≈40.54 mJ) during the charging process. Our ongoing work aims to additionally integrate a DC‐DC converter to improve the relatively low ECSE value, by which more efficient electrical energy delivery from OPV to ECS is expected with a minimal loss through impedance matching . Considering that the gels of ECSs in energy‐storing functional photovoltaics can be patterned to customized‐shapes and visually indicate real‐time capacity in color, the ST energy‐storing functional photovoltaics have high potential for practical applications (we will discuss patterning of ECS gels in the following section).…”

Implementation of Maximum Power Point Tracking (MPPT) Technique on Solar Tracking System Based on Adaptive Neuro-Fuzzy Inference System (ANFIS)

“…Solar irradiation particularly affects the output current where increasing solar irradiation will tend to increase the output current. Meanwhile, operating temperature of photovoltaic module affects the output voltage where increasing temperature will reduce the output voltage [5].…”

Development of a Photovoltaic Module with INC Maximum Power Point Tracking Control System

“…Many methods to track Maximum Power Point (MPP) for PV arrays have been discussed by Trishan Esram et al [5]. The designing of DC-DC converter has been proposed in [8] and [9].…”