Fuzzy Logic Inverter Controller in Photovoltaic Applications: Issues and Recommendations

Hannan, M. A.; Ghani, Z. A.; Hoque, Mohammed Mozammel; Ker, Pin Jern; Hussain, Aini; Mohamed, Azah

doi:10.1109/access.2019.2899610

Cited by 101 publications

(51 citation statements)

References 135 publications

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“…After, a triangular wave with a 6050-Hz signal is used for comparative analysis and generation of the inverter switching frequency. The inverter switches are converted to produce an SPWM signal [29]. The SPWM controls the pulse width of the inverter insulated-gate bipolar transistors (IGBTs) in order to deliver sine-wave-shaped AC voltages.…”

Section: Pwm Signal Generationmentioning

confidence: 99%

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A Fuzzy-Rule-Based PV Inverter Controller to Enhance the Quality of Solar Power Supply: Experimental Test and Validation

et al. 2019

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This paper presents the development of fuzzy-based inverter controller for photovoltaic (PV) application to avoid the nonlinearity characteristic and fluctuations of PV inverter output. The fuzzy-based controller algorithm is employed in the PV inverter control system to optimize the duty cycles of the insulated-gate bipolar transistors (IGBTs) and to enhance the inverter outputs with lower harmonic contents and unity power factor. The developed fuzzy-based PV inverter controller is implemented in the MATLAB/Simulink models and experimentally tested in a dSPACE DS1104 process controller. The obtained simulation result of the developed fuzzy-based PV inverter controller is validated with experimental results under different performance conditions. It is seen that the experimental results of the switching signals, inverter voltage and current, control parameters, and total harmonic distortion (THD) of load current and output voltage of the PV inverter are closely matched with that of the simulation results. To validate the inverter performance, the proposed fuzzy-based PV inverter controller outperforms other studies with a voltage THD of 2.5% and a current THD of 3.5% with unity power factor.

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Section: Pwm Signal Generationmentioning

confidence: 99%

“…The harmonics are produced from the voltage value, which are noticed as sidebands, centered around the switching frequency, and its multiple, as expressed in Equation 8 [29]. Nevertheless, a nearly sinusoidal-shaped output waveform is achieved with the help of an appropriate filter.…”

Section: Pwm Signal Generationmentioning

confidence: 99%

A Fuzzy-Rule-Based PV Inverter Controller to Enhance the Quality of Solar Power Supply: Experimental Test and Validation

et al. 2019

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“…wind, solar. This has led to an increasing effort on the research and development activity in synchronization and control of renewable energy powered grid-connected converters [1]- [8]. In this regard, detecting the phase of the three-phase grid voltage's fundamental frequency positive sequence (FFPS) is an important technical challenge for the control and synchronization purposes.…”

Section: Introductionmentioning

confidence: 99%

Frequency Adaptive Parameter Estimation of Unbalanced and Distorted Power Grid

Ahmed

Benbouzid

Ahsan³

et al. 2020

IEEE Access

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Grid synchronization plays an important role in the grid integration of renewable energy sources. To achieve grid synchronization, accurate information of the grid voltage signal parameters are needed. Motivated by this important practical application, this paper proposes a state observer-based approach for the parameter estimation of unbalanced three-phase grid voltage signal. The proposed technique can extract the frequency of the distorted grid voltage signal and is able to quantify the grid unbalances. First, a dynamical model of the grid voltage signal is developed considering the disturbances. In the model, frequency of the grid is considered as a constant and/or slowly-varying but unknown quantity. Based on the developed dynamical model, a state observer is proposed. Then using Lyapunov function-based approach, a frequency adaptation law is proposed. The chosen frequency adaptation law guarantees the global convergence of the estimation error dynamics and as a consequence, ensures the global asymptotic convergence of the estimated parameters in the fundamental frequency case. Gain tuning of the proposed state observer is very simple and can be done using Matlab commands. Some guidelines are also provided in this regard. Matlab/Simulink based numerical simulation results and dSPACE 1104 board-based experimental results are provided. Test results demonstrate the superiority and effectiveness of the proposed approach over another state-of-the art technique.

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“…At present, they are also used as an interface for the control of motors for electric vehicles [13]. However, one of the most important uses is the transformation of the direct current generated by the photovoltaic panels, accumulators or batteries, into alternating current [14]. There are many points of view from which inverters are classified, one of the essential classifications is made according to their power supply.…”

Section: Introductionmentioning

confidence: 99%

Leakage Current Reduction in Single-Phase Grid-Connected Inverters—A Review

et al. 2020

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The rise in renewable energy has increased the use of DC/AC converters, which transform the direct current to alternating current. These devices, generally called inverters, are mainly used as an interface between clean energy and the grid. It is estimated that 21% of the global electricity generation capacity from renewable sources is supplied by photovoltaic systems. In these systems, a transformer to ensure grid isolation is used. Nevertheless, the transformer makes the system expensive, heavy, bulky and reduces its efficiency. Therefore, transformerless schemes are used to eliminate the mentioned disadvantages. One of the main drawbacks of transformerless topologies is the presence of a leakage current between the physical earth of the grid and the parasitic capacitances of the photovoltaic module terminals. The leakage current depends on the value of the parasitic capacitances of the panel and the common-mode voltage. At the same time, the common-mode voltage depends on the modulation strategy used. Therefore, by the manipulation of the modulation technique, is accomplished a decrease in the leakage current. However, the connection standards for photovoltaic inverters establish a maximum total harmonic distortion of 5%. In this paper an analysis of the common-mode voltage and its influence on the value of the leakage current is described. The main topologies and strategies used to reduce the leakage current in transformerless schemes are summarized, highlighting advantages and disadvantages and establishing points of comparison with similar topologies. A comparative table with the most important aspects of each converter is shown based on number of components, modes of operation, type of modulation strategy used, and the leakage current value obtained. It is important to mention that analyzed topologies present a variation of the leakage current between 0 to 180 mA. Finally, the trends, problems, and researches on transformerless grid-connected PV systems are discussed.

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Fuzzy Logic Inverter Controller in Photovoltaic Applications: Issues and Recommendations

Cited by 101 publications

References 135 publications

A Fuzzy-Rule-Based PV Inverter Controller to Enhance the Quality of Solar Power Supply: Experimental Test and Validation

A Fuzzy-Rule-Based PV Inverter Controller to Enhance the Quality of Solar Power Supply: Experimental Test and Validation

Frequency Adaptive Parameter Estimation of Unbalanced and Distorted Power Grid

Leakage Current Reduction in Single-Phase Grid-Connected Inverters—A Review

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