On the design of LCL filter with passive damping in three-phase shunt active power filters

Popescu, Mihaela; Bitoleanu, Alexandru; Suru, Constantin Vlad

doi:10.1109/speedam.2016.7525899

Cited by 12 publications

(5 citation statements)

References 14 publications

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“…Both studies have ended up with the reduction of the harmonic currents, the LCL filter being the best. The application of a notch filter shows positive effects in [20] as in this research although the control strategies are different. Both schemes have managed to significantly reduce the THD of the grid current below 5% as required by the IEEE standards.…”

Section: Discussionsupporting

confidence: 49%

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Active damping and robust loop shaping control for harmonic minimization

Zongo

Kafuku

2021

IJPEDS

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This paper presents an h-infinity robust loop shaping control and LCL filter to mitigate the effects of harmonic currents in the photovoltaic system integrated with the grid. To eliminate the negative effects of the LCL filter, this work applied notch filter active damping. Existing methods for the elimination of harmonic currents were reviewed. Proportional integral control, fuzzy logic control, h-infinity control, and robust loop shaping control are presented. The grid current was analyzed in the system with all controllers applied to control the voltage source inverter of the system to eliminate harmonics in the grid current caused by the inverter and nonlinear loads for two cases, one being constant loading of the linear and nonlinear load and another is the switching of the nonlinear load during the simulation. The results obtained from the proposed method for the two tests conducted were compared with those from other methods to prove the robustness of the proposed technique. The method manages to reduce the total harmonic distortion of the grid current from 7.85% to 0.79% for case 1 and from 11.67% to 1.14% for case 2.

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Section: Discussionsupporting

confidence: 49%

“…But, the presence of the damping resistance contributes to the increase in losses because the current flows through it as explained in [20]. The losses increase as increase.…”

Section: Figure 4 An Lcl Filter Is Connected To the Gridmentioning

confidence: 98%

Active damping and robust loop shaping control for harmonic minimization

Zongo

Kafuku

2021

IJPEDS

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“…After some manipulation, the results are shown in (9)- (19). Therefore, the Fourier series expression of SPWM wave under integrated control can be expressed as (20) and the Fourier series expression of unipolar SPWM wave can be obtained by using the same method as shown in (21), where J k ( ⋅ ) is the kth-order Bessel function.…”

Section: Harmonic Analysismentioning

confidence: 99%

“…15 and 16, it can be found that the theoretical analysis is basically in accordance with the simulation results. When θ 1 = π/2 the integrated control is equivalent to the traditional unipolar control, (20) and (21) are equivalent at this time and the spectral plots under unipolar control…”

Section: Harmonic Analysismentioning

confidence: 99%

“…Another method that can be considered to reduce the filter volume is using the LCL filter, but the LCL filter is a third-order filter, which has a resonance problem that affects the stability of the system. Besides, it is necessary to use passive damping scheme [21] or active damping scheme (including split capacitor method [22], adaptive backstepping control [23], phase compensator [24] etc.) to suppress frequency disturbance.…”

Section: Introductionmentioning

confidence: 99%

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Improved two‐stage boost inverter with integrated control strategy

Hong

Pan

2019

IET Power Electronics

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In this study, an integrated control strategy is proposed which can be widely used in two-stage boost inverters, and an improved two-stage boost inverter is taken as an example to present the proposed integrated control idea. The presented inverter can operate in four quadrants, which can realise grid-connected or stand-alone inverter. With improved control strategy, it not only can reduce the number of switching times and improve the efficiency but also can reduce the harmonic contents of bridge arm voltage and further decrease the volume and weight of the filter. Therefore, the presented inverter still has the advantages in efficiency and volume when compared with single-stage boost inverters. The operating principle, harmonic analysis, simulation and experiments are provided in this study. A 500 W prototype is established and tested, and the results of simulation and experiments verify the correctness of the theoretical analysis.

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Single-tuned passive filter (STPF) for mitigating harmonics in a 3-phase power system

Ishaya,

Adegboye,

Agyekum

et al. 2023

Sci Rep

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Numerous integrals of the fundamental frequency are known as harmonics and can be found in power systems or electrical circuitry systems. Non-linear loads occasionally drain current or contains a varying impedance with each period of the AC voltage are often responsible for power system harmonics. This can result in system overheating, system losses, and equipment or system damage. In order to achieve the IEEE 519 power quality standard, filters are routinely employed to lower harmonic levels. In this work, we designed a single tuned passive filter (STPF) to minimize harmonics of sequence 5th, 7th, 11th, 13th, 17th, and 19th in a three (3) phase power system. The measurements were taken at the point of common coupling. To test the filter performance, the system and STPF were designed in MATLAB/Simulink, and the simulated results produced without and with STPF were compared. The $${THD}_{I}$$ THD I was reduced from 14.93% down to 4.87% when STPF was connected which is within the IEEE 519-2022 standard; proving that the STPF was effective in decreasing the harmonics to the desired level.

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On the design of LCL filter with passive damping in three-phase shunt active power filters

Cited by 12 publications

References 14 publications

Active damping and robust loop shaping control for harmonic minimization

Active damping and robust loop shaping control for harmonic minimization

Improved two‐stage boost inverter with integrated control strategy

Single-tuned passive filter (STPF) for mitigating harmonics in a 3-phase power system

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