DFPI-based Control of the DC-bus Voltage and the AC-side Current of a Shunt Active Power Filter

Elhaj, Nabil; Sedra, M. B.; Djeghloud, H.

doi:10.11591/eei.v5i4.572

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Also active power filters are used to improve power quality of the AC/DC converters. The highly distorted waveforms due to resonance may perhaps produce mal-operation of the protection devices, electromagnetic communication interference, increase tempreture of transformers, vibration, and overloading of power factor correction capacitors [13]- [17]. Due to rise demand of electrical trains and increase power dememands, harmonics resonance pollution has become a main interest in both power system quality and renewable enegy sources.…”

Section: Introductionmentioning

confidence: 99%

Harmonics resonance elimination technique using active static compensation circuit

2021

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The existence of nonlinear loads produces high distortion and low power factor in the power system that leads to get poor power quality. Resonance problem is occurred due to the power system inductances and the compensation capacitors which increases the harmonic distortion. Therefore, it is necessary to prevent the action of resonance even if conventional or modern methods are built to improve the power system quality. In this paper, active static compensation circuit is proposed and designed to have the features of improving power factor, reducing THD, and eliminating the harmonics resonance effect at the same time with different linear and nonlinear load conditions. These features have been performed based on a modified pulse width modulation technique to drive and control the proposed circuit. The originality designed point of this technique is to have ability to operate the active static compensation circuit as harmonics injector, power factor corrector and resonance eliminator at the same time. Simulation model results illustrate that the proposed circuit is effective for both steady-state and transient operations conditions. The THD of the supply voltage and current at firing angle (α=300) is reduced by 99% and 98.8% respectively. While the power factor is improved to stay around unity.

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Section: Introductionmentioning

confidence: 99%

Harmonics resonance elimination technique using active static compensation circuit

2021

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“…In developing the extraction algorithm, many methods have been studied and applied whether in time or frequency based domains. In frequency based domain, the techniques used are ranging from fast Fourier and discrete Fourier series [2][3][4][5], Kalman filtering [6][7][8] and wavelet transformation [9]. However, working in the frequency domain is a little tedious as it involves transformation of information into frequency domain.…”

Section: Introductionmentioning

confidence: 99%

Adaptive notch filter under indirect and direct current controls for active power filter

Mohamad¹,

Radzi²,

Mailah³

et al. 2020

Bulletin EEI

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This study presents the implementation of adaptive notch filter (ANF) as reference signal extraction for shunt active power filter (APF) in indirect current control (ICC) and direct current control (DCC) modes for three phase system. The ANF functions to filter the signal that inputted to it by producing a fundamental signal and harmonics signal. The advantage of applying the ANF algorithm is based on its simple design that giving the ANF advantages to be utilize in microcontroller. The performance of the ANF is validated though MATLAB simulation in ICC dan DCC configurations. Based on the simulation results, the ANF is capable to work efficiently for both ICC and DCC modes, but in term of efficiency, the ICC mode is clearly showing a better harmonics mitigation result. Base on the result also it shown that the ANF is capable of mitigate the harmonics below the standard required by the IEEE 519-92. The application of ANF is useful to be applied due to its simple design and filtering method.

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Comparative Analysis of a Family of Sliding Mode Observers under Real-Time Conditions for the Monitoring in the Bioethanol Production

et al. 2022

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Online monitoring of fermentation processes is a necessary task to determine concentrations of key biochemical compounds, diagnose faults in process operations, and implement feedback controllers. However, obtaining the signals of all-important variables in a real process is a task that may be difficult and expensive due to the lack of adequate sensors, or simply because some variables cannot be directly measured. From the above, a model-based approach such as state observers may be a viable alternative to solve the estimation problem. This work shows a comparative analysis of the real-time performance of a family of sliding-mode observers for reconstructing key variables in a batch bioreactor for fermentative ethanol production. These observers were selected for their robust performance under model uncertainties and finite-time estimation convergence. The selected sliding-mode observers were the first-order sliding mode observer, the proportional sliding mode observer, and the high-order sliding mode observer. For estimation purposes, a power law kinetic model for ethanol production by Saccharomyces cerevisiae was performed. A hybrid methodology allows the kinetic parameters to be adjusted, and an approach based on inference diagrams allows the observability of the model to be determined. The experimental results reported here show that the observers under analysis were robust to modeling errors and measurement noise. Moreover, the proportional sliding-mode observer was the algorithm that exhibited the best performance.

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DFPI-based Control of the DC-bus Voltage and the AC-side Current of a Shunt Active Power Filter

Cited by 3 publications

References 15 publications

Harmonics resonance elimination technique using active static compensation circuit

Harmonics resonance elimination technique using active static compensation circuit

Adaptive notch filter under indirect and direct current controls for active power filter

Comparative Analysis of a Family of Sliding Mode Observers under Real-Time Conditions for the Monitoring in the Bioethanol Production

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