System identification‐based MPPT algorithm for PV systems under variable atmosphere conditions using current sensorless approach

Abstract

Summary In photovoltaic power systems operating under variable atmospheric conditions, the success of maximum power point tracking (MPPT) methods is very important for efficiency. Therefore, many different MPPT methods have been developed in the literature. The voltage‐controlled MPPT method is one of the oldest methods that is easy to implement but operates with low efficiency in variable weather conditions. At variable radiation and temperature values, the voltage value that the system must generate in order to capture the MPP point was obtained by modeling the PV system by the system identification. Thus, using only system input and output information, a model was created without the need for system parameters. In this study, system modeling was performed using the Wavenet nonlinear function. The output of the system model gives the reference voltage required to capture the MPP point. Thus, the reference input voltage of the MPPT was made adaptive against changing weather conditions. By using the proposed voltage controlled MPPT method and the other conventional methods such as Incremental Conductance (IC), Perturb and Observe (PO), and Constant Voltage Controller(CVC) methods, various simulations (3 different scenario) were performed in Matlab/Simulink environment. The results obtained from simulations carried out for three different weather conditions were given comparatively. The performance of the proposed method was analyzed in detail at the change points of the temperature and radiation values, and at some other regions.

Assessment of maximum power point trackers performance using direct and indirect control methods

“…Despite this fact, the indirect method is very popular, as evident by the number of researchers that have opted to use it. [19][20][21][22][23][24][25][26][27][28] On the other hand, the proponents of the direct method did not provide any justification for their choice, other than simplicity. None has considered the influence of the converter topology, the load changes and the rapid change in G on the MPPT tracking performance.…”

“…This is in contrast to the indirect control, in which a voltage controller is mandatory. Despite this fact, the indirect method is very popular, as evident by the number of researchers that have opted to use it 19‐28 . On the other hand, the proponents of the direct method did not provide any justification for their choice, other than simplicity.…”

Anovel power management strategies inPV‐wind‐based grid connected hybrid renewable energy system using proportional distribution algorithm

“…Each RES controller contains an algorithm that is specific to that type of source. The PV controller controls the PV source using any MPPT strategy already known 22‐25 . The wind farm controller controls the wind turbines using the proportional repartition of the powers 17 or can use any other algorithms available in the literature 26‐29 .…”

Comparison of PO and INC MPPT Methods Using FPGA In-The-Loop Under Different Radiation Conditions

“…OLAR ENERGY is used extensively in renewable energy systems. However, due to the low efficiency of photovoltaic (PV) systems, various algorithms have been developed to obtain maximum energy from PV modules [1][2]. Among these algorithms, the oldest and most heavily used algorithms are the Perturb and Observe (PO) and Incremental Conductance (INC) methods.…”