A vectorial MPPT algorithm for distributed photovoltaic applications

Abstract

In this paper a novel multi variable maximum power point tracking algorithm is introduced. The method is suitable for distributed photovoltaic applications and, in contrast with the concept of using a power optimizer for each module working independently from the others, the architecture used in this paper is based on the adoption of a centralized controller for distributed DC/DC converters. The technique uses a vectorial control of the converters that perturbs the operating points of all the DC/DC converters at one time and observes the power transferred to the DC link. Simulation results confirm that the proposed technique performs better than other multi variable controls presented in recent literature.

A Multivariable Perturb-and-Observe Maximum Power Point Tracking Technique Applied to a Single-Stage Photovoltaic Inverter

“…Simulation results have been used in order to explain the approach, and they confirm the significant improvement in terms of power extracted from the PV array. Further results demonstrating the usefulness of the proposed approach to different MPPT problems are shown in [23]. Giovanni Spagnuolo (M'98-SM'10) was born in Salerno, Italy, in 1967.…”

Experimental evaluation of a MPPT technique for electrical mobility PV applications

“…Experimental results referring to the case of the car moving at low speed into a parking area show that the transient response of the MV-MPPT method can be improved by using the control technique described in [2] or by changing the topology into the one shown in [3]. The former improvement can be achieved in a easy way because it does not require a change in the circuit topology but only a re-programming of the embedded system driving the duty cycle of the dc/dc converters.…”

“…This technique can be improved furthermore, especially in order to improve its promptness with respect to irradiance changes [2].…”

Overview of Maximum Power Point Tracking Techniques for Photovoltaic Energy Production Systems

“…An alternative DMPPT topology based on the methods presented in [74][75][76] is illustrated in Figure 17. In this case, the PV strings are formed by connecting in series the outputs of the DC/DC converters, which are connected at the output of each PV module.…”

“…Alternative DMPPT control schemes based on the methods presented in [75] are illustrated in Figure 18. The MPPT process may be performed by either executing the MPPT process (e.g., P&O) at each DC/DC converter separately or by measuring the total power of the DC bus and then sending the appropriate control signal to each DC/DC converter.…”