Huzaifa Altaf's research while affiliated with PharmEvo Pvt. Ltd. and other places

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Publications (1)


Figure 1. An AC output 3-level square waveform. The Sinusoidal Pulse Width Modulation (SPWM) based Inverter This technique involves modulation of a triangular carrier wave (Ac) with a sinusoidal reference wave (Ar) of the desired frequency, which in return produces gate pulses for MOSFETS/IGBTS as shown in Figure 2.
Figure 2. Modulation technique for SPWM pulses. Filtering Techniques and Mitigation of Harmonics With the introduction of harmonics in power systems, associated waveforms take complex shapes and their characteristics differ from the perfect sinusoids. Fourier analysis requires a greater amount of computation, and decomposition of the waveforms into their
Figure 4. The active power harmonic filter (APHF). The figure shows a possible parallel connection of the APHF or AHF, with a source inverter and a nonlinear load. By switching the three-phase switch, the filter can be connected to the system for filtering the unwanted harmonics. RESULTS Simulations are done with different types of supplies, loads, and filters. Figure 5 shows the output of the square wave inverter and its Fast Fourier Transform (FFT) analysis. The sample is taken for initial 5 cycles for a 50 Hz system and THD% along with the frequency spectrum is obtained.
Figure 7. Output and FFT analysis of SPWM inverter.
Figure 9. The distorted current waveform. The nonlinear load distorted the current waveform whereas the related FFT analysis is shown in Figure 10.

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Prominence of Filtering Techniques for Harmonics Mitigation in Advanced Power Electronics Systems
  • Article
  • Full-text available

June 2022

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268 Reads

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1 Citation

Muhammad Arslan Sadiq

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Nusrat Husain

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Huzaifa Altaf

With the advancement in technology, non-linear loads, continue to increase, and the enigma of harmonics is getting more and more serious; thus the huge addition of electronic loads in power systems has formed the problem of the harmonic generation that has resulted in many associated drawbacks. This paper aims to analyze the harmonics in advanced power electronics-based systems and describes a solution to mitigate them through two distinguished filtering techniques. A rigorous analysis is done concerning the generation of harmonic distortion through different types of loads and harmonic mitigation by employing passive and active power filters. The active harmonic (adaptive) filtering method mitigates all sorts of undesirable frequency components using adaptive control-based algorithms by calculating the weight of the fundamental component and generating a harmonics replica to subtract it from the original periodic wave. The simulations that were done in Simulink, a MATLAB ®-based graphical programming environment, clearly show that the indicated techniques can mitigate undesirable harmonics and can lower the total harmonic distortion (THD) effectively according to the statutory limit of the IEEE 519-2014 standard and IEC 61000-3 series standards, hence lowering the associated drawbacks of harmonic generation in advanced power electronics systems.

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Citations (1)


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Reference:

Exposure to Auto-Irrigation System of Pakistan Using Solar PV Power
Prominence of Filtering Techniques for Harmonics Mitigation in Advanced Power Electronics Systems