Flyback Inverter Using Voltage Sensorless MPPT for Photovoltaic AC Modules

Abstract

A flyback inverter using voltage sensorless maximum power point tracking (MPPT) for photovoltaic (PV) AC modules is presented. PV AC modules for a power rating from 150 W to 300 W are generally required for their small size and low price because of the installation on the back side of PV modules. In the conventional MPPT technique for PV AC modules, sensors for detecting PV voltage and PV current are required to calculate the PV output power. However, system size and cost increase when the voltage sensor and current sensor are used because of the addition of the auxiliary circuit for the sensors. The proposed method uses only the current sensor to track the MPP point. Therefore, the proposed control method overcomes drawbacks of the conventional control method. Theoretical analysis, simulation, and experiment are performed to verify the proposed control method.

An online optimum voltage estimation and real‐time MPP tracking for a PV system

“…One can substitute a PV cell to an equivalent electric circuit, which includes a power supply and a diode, as shown in Figure …”

Single Sensor Charging System with MPPT Capability for Standalone Streetlight Applications

“…MPPT is an important issue in solar energy conversion and a comprehensive body of literature has been dedicated to its development [19]- [31]. Among the many MPPT algorithms, the Perturb and Observe (P&O) and Hill Climbing (HC) methods are the most commonly used due to their simplicity and satisfactory results [19], [20], [26].…”

“…Reduced sensor MPPT has been proposed in many previous studies in an effort to provide low cost and simpler MPP tracking systems. [24], [28]- [31] proposed reduced MPPT algorithms at the PV panel side. Either PV voltage or PV current parameter is used to estimate the value of the power generated by PV panel.…”

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“…With the continuing trend toward higher power rating, higher efficiency, lighter weight, and smaller size power electronic converters in various applications [1]- [6], the need for better performance power switching devices has been warranted. In recent years, wide bandgap (WBG) semiconductor materials, such as silicon carbide (SiC) and gallium nitride (GaN) based devices have become available [7]- [14].…”