A New Kalman-Filter-Based Harmonic Current Suppression Method for the Virtual Oscillator Controlled Grid-Tied Inverter

Luo, Siyi; Wu, Weimin; Koutroulis, Eftichios; Chung, Henry Shu-Hung; Blaabjerg, Frede

doi:10.1109/jetcas.2022.3141106

Cited by 9 publications

(3 citation statements)

References 37 publications

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“…Thereby, the active power-frequency control is usually applied by considering the inductive impedance. According to the different types of wire, the modified droop strategy has been designed and implemented in the case of pure inductance (Jiang et al, 2021e;Keyvani-Boroujeni et al, 2021;Huang et al, 2022) and pure resistance impedance (Luo et al, 2022), but few research studies explore the complex impedance of the system. In applications, the distance between different converter units is a little far, and the inductance and resistance wire impedance cannot be ignored through the parallel connection of different wires.…”

Section: Secondary Controlmentioning

confidence: 99%

Dual Ascent Algorithm-Based Improved Droop Control for Efficient Operation of AC Microgrid

Jiang

Yang

2022

Front.Electron.

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In this work, the loss (including wire loss and converter loss) of island three-phase AC microgrid is modeled as a quadratic function of the current distribution coefficient, that is, a concave function with equality and inequality constraints. On the basis of the concave optimization principle, the optimal current distribution coefficient of the distributed energy unit (DEU) is calculated online by the double ascent optimization method (DAOM) to minimize the distribution loss. It is proven that the concave function with multi-variables can be optimized by the DAOM. Using the average reactive power distribution scheme, the optimal active power distribution coefficient with the minimum distribution loss of the AC microgrid can be obtained in real time. In addition, given the high R/X ratio in the short-distance AC microgrid, the active power–frequency (P-ω) droop control and reactive power–voltage amplitude (Q-E) droop control are not suitable for power distribution among DEUs. Thus, an advanced strategy comprising active power–voltage amplitude (P-E) droop control and reactive power-frequency (Q-ω) droop control is proposed to dispatch the output active powers and reactive powers of DEUs. Simulation examples are provided to verify the convexity of the proposed model and the effectiveness of the control strategy.

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Section: Secondary Controlmentioning

confidence: 99%

Dual Ascent Algorithm-Based Improved Droop Control for Efficient Operation of AC Microgrid

Jiang

Yang

2022

Front.Electron.

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“…However, the passive filter has several drawbacks, including a high configuration size, fixed harmonic correction, and the creation of resonance with the power system network. Active power filters (APFs), the most popular and well-respected harmonic mitigation filters in the market, can be utilized to mitigate the shortcomings of passive power filters [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Shunt active filters produce sinusoidal current waveforms by applying harmonic compensating current that is equal in magnitude and opposite in phase to the harmonics in the current. As opposed to the shunt active filter, which reduces distortions associated with currents, the series active filter reduces distortions associated with voltages [7,8].…”

Section: Introductionmentioning

confidence: 99%

Kalman Filter-Based Harmonic Distortion Mitigation Technique for Microgrid Applications

Iqbal,

Khalid,

Riggs

et al. 2024

Applications and Optimizations of Kalman Filter and Their Variants

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This work presents a Kalman filter-based harmonic mitigation technique that can be used to reduce the total harmonic distortion (THD) of grid-injected current by reducing the harmonic distortion. Throughout the power supply system, power electronic converters have become increasingly used in recent years, which has resulted in more reactive power and harmonics. In a power system, harmonics add to noise and lower power quality. A study in MATLAB/Simulink 2022b for improving the THD of renewable energy injected grid currents using seven-level packed u-cells (PUC7) has been undertaken to improve the grid-injected current THD with Kalman filter-based harmonic mitigation technique. With the Kalman filter-based harmonic mitigation techniques, the THD for the grid-injected current is improved from 6.32 to 2.49% when compared to the grid-injected current without the Kalman filter-based technique.

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Optimization model for harmonic mitigation based on PV-ESS collaboration in small distribution systems

Wang,

et al. 2024

Applied Energy

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A New Kalman-Filter-Based Harmonic Current Suppression Method for the Virtual Oscillator Controlled Grid-Tied Inverter

Cited by 9 publications

References 37 publications

Dual Ascent Algorithm-Based Improved Droop Control for Efficient Operation of AC Microgrid

Dual Ascent Algorithm-Based Improved Droop Control for Efficient Operation of AC Microgrid

Kalman Filter-Based Harmonic Distortion Mitigation Technique for Microgrid Applications

Optimization model for harmonic mitigation based on PV-ESS collaboration in small distribution systems

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