A new method of single-phase active power filter for AC electric railway system based on Hilbert transform

Aghazadeh, Amir; Niazazari, Iman; khodabakhshi, naser; Hosseinian, Seyed Hossein; Abyaneh, Hossein Askarian

doi:10.1109/sege.2013.6707928

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…Different types of inverters, thanks to the recent advances in the field of power electronics industry, are utilised in a wide range of industrial applications, ranging from low-voltage, low-power devices (such as micro-inverters used in household photovoltaic systems [1]) to high-voltage (HV), high-power systems (such as electric motor drive [2], active filters [3,4], and HV direct current electric power transmission systems [5][6][7][8]). Regarding all considerable advantages offered by industrial inverters, all of them -especially multi-level (ML) inverters -suffer from complicated pulse-width modulation (PWM) techniques [9], unbalanced neutral point voltages [10], and so on.…”

Section: Introductionmentioning

confidence: 99%

Adapted near‐state PWM for dual two‐level inverters in order to reduce common‐mode voltage and switching losses

Aghazadeh

Khodabakhshi‐Javinani

Nafisi

et al. 2019

IET power electron.

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In this paper, a near-state pulse-width modulation (NSPWM) algorithm is proposed and implemented on dual-twolevel voltage-source inverters (D2L-VSIs) in order to reduce the common-mode voltage (CMV), the inverter switching losses, the current total harmonic distortion, and the side effects of bearing currents-compared with space vector modulation (SVM) and PWM7. To gain these goals, two conventional two-level inverters of the D2L-VSI are controlled, separately, with specific switching sequences and an adjusted phase difference between the carriers of two inverters. For evaluating and comparing these PWM techniques mathematically, both CMV root mean square generated and switching losses of the D2L-VSI are formulated as a function of the power factor of the D2L-VSI, which is driven by the methods detailed in this study. Eventually, theories and analysis, as well as simulations and experimental results-which are generated by MATLAB/Simulink environment and a 300 W scaled-down D2LVSI prototype, respectively-authenticate the superiority of the proposed NSPWM over both SVM and PWM7.

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Section: Introductionmentioning

confidence: 99%

Adapted near‐state PWM for dual two‐level inverters in order to reduce common‐mode voltage and switching losses

Aghazadeh

Khodabakhshi‐Javinani

Nafisi

et al. 2019

IET power electron.

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“…It is most appropriate to apply HT to the signal after it has been processed, i.e., after noise filtering. The mathematical definition of HT is [ 111 , 112 ]:

where P is Cauchy principal value,

is the analytic signal formed from the initial signal

and its HT, the parameter

is the instantaneous amplitude, and

is the instantaneous phase [ 111 , 112 ].…”

Section: Harmonic Extraction Algorithmsmentioning

confidence: 99%

“…It can be implemented by an ideal filter with an amplitude response of unity and a phase response that is a constant ninety-degree delay. The Hilbert transform can be called a quadrature filter, as it shifts the phase of the spectral components by

[ 111 , 112 ].…”

Section: Harmonic Extraction Algorithmsmentioning

confidence: 99%

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Review of Fundamental Active Current Extraction Techniques for SAPF

Baroš

Sotola

Bilík

et al. 2022

Sensors

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The field of advanced digital signal processing methods is one of the fastest developing scientific and technical disciplines, and is important in the field of Shunt Active Power Filter control methods. Shunt active power filters are highly desirable to minimize losses due to the increase in the number of nonlinear loads (deformed power). Currently, there is rapid development in new adaptive, non-adaptive, and especially hybrid methods of digital signal processing. Nowadays, modern methods of digital signal processing maintain a key role in research and industrial applications. Many of the best practices that have been used to control shunt active power in industrial practice for decades are now being surpassed in favor of new progressive approaches. This systematic research review classifies the importance of using advanced signal processing methods in the field of shunt active power filter control methods and summarizes the extant harmonic extraction methods, from the conventional approach to new progressive methods using genetic algorithms, artificial intelligence, and machine learning. Synchronization techniques are described and compared as well.

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“…Several well-known switching strategies are used in cascaded H-Bridge multilevel inverters (CHB-MLIs) topology. These switching strategies are pulse width modulation (PWM) [4], [5] sinusoidal pulse width modulation (SPWM) [6], space vector pulse width modulation (SVPWM) [7], [8] and selective harmonic elimination PWM (SHEPWM) [9], [10]. In these methods, switching angles, DC voltages or both are determined to minimize the voltage THD [11].…”

Section: Introductionmentioning

confidence: 99%

FPGA Based Implementation of Cascaded Multi-level Inverter with Adjustable DC

Firouzkouhi

2018

IJRE

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In this paper, total harmonic distortion (THD) minimization problem for cascaded H-Bridge multilevel inverters (CHB-MLIs) with unequal DC sources is studied, which the DC voltage levels of CHB-MLI is considered to be dependent on switching angles. Two forms of variations are proposed for DC voltage, considering corresponding switching angles. A simplified THD formulation, independent from the DC voltage is presented. Both Homotopy method and Genetic Algorithm is applied for THD minimization using Selective Harmonic Elimination PWM (SHEPWM). The results show less THD results using GA. The simulation results are demonstrated by experiments on a seven-level inverter controlled by Xilinx SPARTAN3 FPGA (XC3S400-PQG208). The results show that switching angles for minimum THD can be considered constant for desired fundamental voltages.

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A new method of single-phase active power filter for AC electric railway system based on Hilbert transform

Cited by 9 publications

References 7 publications

Adapted near‐state PWM for dual two‐level inverters in order to reduce common‐mode voltage and switching losses

Adapted near‐state PWM for dual two‐level inverters in order to reduce common‐mode voltage and switching losses

Review of Fundamental Active Current Extraction Techniques for SAPF

FPGA Based Implementation of Cascaded Multi-level Inverter with Adjustable DC

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