Vector-Proportional-Integral Control of Inductor-Capacitor-Inductor Active Power Filter under the Alpha-Beta Stationary Coordinate System

Liu, Dandan; Zhou, Lin; Sai, Xiangyu

doi:10.18280/ejee.220110

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…This voltage is compared with its reference Vdc-ref, and then the error voltage is applied to the input of a standard type PI corrector as shown in Figure 11. According to the error between the reference voltage and the DC capacitor voltage, the PI controller generates a signal proportional to the power absorbed or supplied by the DC link capacitor [24][25][26]. Then it is added to the harmonic component of active power.…”

Section: Capacitor Voltage Controlmentioning

confidence: 99%

Self Tuning Filter Based Fuzzy Logic Controller for Active Power Filter

Faiza¹,

Morsli²,

Allaoui³

2020

JESA

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The performance of the Active Power Filter (APF) depends on the identification strategy of the reference currents and their control. Among the control strategies proposed in the literature to identifying the reference currents, that based on Self Tuning Filter (STF) which allows extracting directly the voltage and current fundamental components in the α-β axis at high performances, without any Phase Locked Loop (PLL). The performance of STF is function of its proportional parameter. However, there is no technique existed in the literature to dimensioning the proportional parameter of the STF filter. This paper presents an improved method for identifying the reference harmonic currents to be generated by the APF, based on STF for the extraction of harmonic currents and equipped with a Fuzzy Logic Corrector (FLC) in order to improve the waveform of the electric lines currents. The FLC adjust in real time the proportional parameter of the STF filter. The proposed FLC-STF regulator allows to having an optimal extraction of the harmonic currents. The conventional hysteresis method was used for the current control technique to generate the switching sequences of the static switches of the APF voltage inverter. The obtained simulation results, performed under the MATLAB/Simulink® environment on a system feeding a non-linear load, show good performance.

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Section: Capacitor Voltage Controlmentioning

confidence: 99%

Self Tuning Filter Based Fuzzy Logic Controller for Active Power Filter

Faiza¹,

Morsli²,

Allaoui³

2020

JESA

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“…To pursue better compensation performance, scholars at home and abroad have introduced vector proportional integral (VPI) current tracking control. VPI control can eliminate the peak delay of the PR controller in the closedloop response [23,24]. However, VPI control is also very sensitive changes in grid-side frequency.…”

Section: Introductionmentioning

confidence: 99%

Adaptive PI + VPI Harmonic Current Compensation Strategy under Weak Grid Conditions

Zhou

Han²,

Jia

et al. 2023

Applied Sciences

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With the increase of the penetration rate of renewable energy power generation in the power system, the power grid gradually tends to be weak. Under the scenario of nonlinear load connecting to weak power grid, the grid-side voltage will produce unbalance, distortion and frequency deviation due to the influence of large internal impedance, insufficient inertia, three-phase current unbalance and harmonics of weak power grid. The operation of active power filters (APF) under above conditions can lead to significant degradation in harmonic compensation performance. An adaptive proportional integral (PI) + vector PI (VPI) harmonic compensation strategy for a three-phase APF is proposed for use in complex conditions of weak grid. The strategy consists of an adaptive notch filter based synchronous phase-locked loop (ANF-PLL) and an adaptive PI + VPI current control method. In this strategy, a series of adaptive lattice notch filters are introduced to improve the accuracy of grid phase and frequency estimation under the condition of voltage unbalance, distortion and a large range of frequency deviation. Then the phase and frequency information are used in the Park transformation of harmonic detection and current compensation control and the update of PI + VPI current control law parameters. A VPI current tracking controller with adaptive resonant frequency is constructed, which can improve the gain of the resonant frequency point and ensure that the APF can maintain the best compensation performance under the above weak grid conditions. Finally, the simulation and experimental results indicate that the ANF-PLL shows a better phase and frequency estimation performance under complex conditions of weak grid than the conventional and notch filter based methods, and the harmonic compensation strategy presented in this paper achieves a significant performance improvement under complex conditions of weak grid compared with Fixed VPI/SRF-PLL strategy and adaptive VPI/NF-PLL strategy.

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Vector-Proportional-Integral Control of Inductor-Capacitor-Inductor Active Power Filter under the Alpha-Beta Stationary Coordinate System

Cited by 2 publications

References 20 publications

Self Tuning Filter Based Fuzzy Logic Controller for Active Power Filter

Self Tuning Filter Based Fuzzy Logic Controller for Active Power Filter

Adaptive PI + VPI Harmonic Current Compensation Strategy under Weak Grid Conditions

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