Influence of bus voltage variations on two Maximum Power Point control loops

Author(s):  
Koen Martens ◽  
Bart Meersman ◽  
Jeroen De Kooning ◽  
Bert Renders ◽  
Tine Vandoorn ◽  
...  
Author(s):  
Cristian Vasar ◽  
Marius Babescu ◽  
Doru-Ionut Petrescu ◽  
Octavian Prostean ◽  
Radu Boraci

Solar Energy ◽  
2011 ◽  
Vol 85 (3) ◽  
pp. 588-600 ◽  
Author(s):  
Dorin Petreuş ◽  
Toma Pătărău ◽  
Stefan Dărăban ◽  
Cristina Morel ◽  
Brian Morley

Author(s):  
Abdelmalek Meftouhi ◽  
Othmane Abdelkhalek ◽  
Ahmed Allali ◽  
Abdallah Ben Abdelkader ◽  
Toufik Toumi

<span lang="EN-US">The use of loads in the past few days is becoming vast, giving an alarm signal to the power system and electronics engineers in terms of power quality. Due to the large amount of non-linear power electronics, utilities frequently experience voltage and harmonic distortions every day. In this paper, the combination of the Series active power filter SAPF with a PV source is deliberated. The PV based on the SAPF aims to compensate voltage deviations or disturbances that occur in the system caused by power quality issues. The proposed system consists of a PV source connected to the DC link through two dc-dc converters, the first extracts the maximum power of the PV source through pulse with modulation PWM signals generated from the maximum power point tracker MPPT controller. Thus, the second converter is used to regulate the high voltage side of the converter through closed control loops using Fuzzy Logic Controller FLC, in addition to a voltage source inverter VSI and a series injection transformer. Despite of fluctuations of the DC link during the compensation of the needed energy, MPPT and closed control loops generate PWM signals to the switching devices of dc-dc boost converters in order to extract maximum PV power and to maintain the bus voltage within its limits and around its reference values respectively. The proposed topology is simulated in Matlab Simulink software, where simulation results show that the proposed PV based SAPF can efficiently reduce problems of voltage sag and harmonic.</span>


Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4550
Author(s):  
Moacyr A. G. de Brito ◽  
Victor A. Prado ◽  
Edson A. Batista ◽  
Marcos G. Alves ◽  
Carlos A. Canesin

This paper presents a novel complete design procedure to convert a maximum power point tracking (MPPT) algorithm into a control system. The MPPT algorithm can be tuned by employing any control system design. In this paper, we adopted Bode diagrams using the criteria of module and phase as the power electronics specialists are habituated with such concepts. The MPPT control transfer functions were derived using the average state equations and small-signal analysis. The control loops were derived for power and voltage control loops. The design procedure was applied to the well-known perturb and observe (P&O) and incremental conductance (IC) algorithms, returning the P&O based on PI and IC based on PI algorithms. Such algorithms were evaluated through simulation and experimental results. Additionally, we showed that the proposed design methodology can optimize energy harvesting, allowing algorithms to have outstanding tracking factors (above 99%) and adaptability characteristics.


Author(s):  
P. Suresh ◽  
D. Kirubakaran

In this paper, an Enhanced Zeta Converter (EZC) along with a high voltage gain converter is presented for DC Bus voltage regulation. The enhanced zeta converter consists of capacitors connected in parallel with the conventional zeta structure. The proposed zeta converter is applied to the Photo Voltaic system (PV) The well known Maximum Power Point Tracking (MPPT)     P &amp; O algorithm is used to extract maximum power from the photovoltaic system. The increased voltage is obtained with reduced number of switches using the proposed structure. The results to the proposed structure are compared with the conventional topology. The proposed converter is simulated using MATLAB and the same is verified with the hardware.


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