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1

A fuzzy logic approach to shunt active power filter and hybrid active power filter

Sahoo Nirjharini, Panda Gayadhar, Subudhi B. D.

Journal of Power Technologies

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2023

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Vol. 103, nr 4

209--217

EN

This paper describes a Fuzzy Logic approach to Shunt Active power filter (SAPF) versus Hybrid Active Power Filter (HAPF) using Simulink. Here hysteresis controlled PWM method is applied to the SAPF and HAPF as a current controller and Fuzzy logic controller as a inverter dc voltage controller. To reduce harmonics, Shunt Active Power Filters (SAPFs) are used with various control schemes, but Hybrid Active power filter is a power electronic device which has both the characteristics of passive power filters and active power filters, which helps in cancelation of the harmonics by producing compensating signal. The fuzzy-hysteresis controller is designed and its simulation results are presented for both the filter types, showing acceptable THD results for the word length used in the fixed-point computations involved in the switching sequence generation. The results of the above controller are compared with the Indirect current controller.

2

Nonlinear magnetic circuit – self inductance definitions, passivity and waveforms distortion

Spałek Dariusz

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2022

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Vol. 70, nr 3

art. no. e141003

EN

The generalized magnetizing curve series for the nonlinear magnetic circuit is proposed. Subsequently, three definitions of self-inductance for the nonlinear magnetic circuit are compared. The passivity of the magnetic circuit is reconsidered. Three theorems that describe features of Fourier harmonics of distorted waveforms have been proved.

3

Improvements of high-voltage trapezoidal waveform edge-rounding circuit

Jankowski Mariusz

International Journal of Microelectronics and Computer Science

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2018

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Vol. 9, nr 3

93--100

EN

This paper introduces a solution to a design problem caused by necessity of electromagnetic noise reduction in simple close-range wireless command and control systems, including Radio-frequency identification (RFID) systems. Trade-off between simplicity of data transmission, detection and decoding on one side vs. presence of high frequency harmonics in transmitted signals on the other makes some designers choose approach in which trapezoidal waveforms are used instead of rectangular ones. Moreover, edges of trapezoidal waveforms are additionally rounded to further limit presence of higher harmonics and thus to comply to EMI regulations and requirements. The paper proposes a solution based on a reimplementation of a high-voltage structure already proposed by the author, but implemented with use of different semiconductor technology process. Utilization of this new process and devices available in this technology makes possible significant increase of the circuit operation quality.

4

An efficient algorithm to tuning PI-controller parameters for shunt active power filter using ant colony optimization

Berbaoui B., Benachaiba C., Rahli M., Tedjini H.

Przegląd Elektrotechniczny

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2011

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R. 87, nr 6

140-145

EN

This paper presents an optimal control method entitled ant colony PI controller (ACO-PI) for extracting the reference compensating currents to shunt active power filter (SAPF) under balanced voltages conditions, which is applied to eliminate line current harmonics and compensate reactive power. Two different control methods has been proposed for SAPF based on proportional-integral (PI) controller and intelligent PI-controller with ACO are presented. The identification theory based on instantaneous power (p-q) is used to establish the suitable current reference signals. The simulation results show that the new control method using ACO approach is not only easy to be implanted, but also very effective in reducing the unwanted harmonics and compensating reactive power. The studies carried out have been accomplished using the MATLAB Simulink Power System Toolbox.

PL

W artykule zaprezentowano wykorzystanie kontrolera PI bazującego na algorytmie mrówkowym ACO do sterowania aktywnym filtrem mocy. Zaproponowano dwie metody sterowania – z kontrolerem PI I kontrolerem ACO. Symulacje wykazały że nowy kontroler jest nie tylko łatwy do implementacji ale także efektywnie redukuje niepożądane harmoniczne i moc bierną.

5

On correctness of the basics of Palumbo and Pennisi's means of harmonic distortion calculation in analog integrated circuits

Borys A.

Zeszyty Naukowe Wyższej Szkoły Informatyki

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2009

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Vol. 8, Nr 2

5-16

EN

It is shown that the method of Palumbo and Pennisi of harmonic distortion calculation is nothing else but a highly specialized variant of the analysis based on the Volterra series. Their power series-like description of a nonlinear system turns out to be a truncated Volterra series which is valid for only one type of input signals. Moreover, simple derivation of their basic but unclear formulae is presented here.

PL

W pracy pokazano, że sposób obliczeń zniekształceń harmonicznych opracowany przez Palumbo i Pennisiego jest niczym innym tylko uproszczoną analizą z wykorzystaniem szeregu Volterry. Ponadto wykazano, że użyty przez nich opis układu za pomocą pewnego szeregu potęgowego nie ma walorów ogólności (zakres jego stosowalności jest ograniczony tylko do pewnej postaci sygnałów wejściowych). Przedstawiono również właściwe interpretacje założeń i poprawne wyprowadzenia podstawowych zależności użytych przez Palumbo i Pennisiego.