Modeling and Resonance Analysis of Parallel Grid-Connected Inverters with LCL Filters

Bourogaoui, Manef; Houari, Azeddine; Houda, Ben Attia Sethom; Machmoum, Mohamed

doi:10.1109/cistem.2018.8613402

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…Among all renewable energy sources, solar photovoltaic power generation stands out as one of the most promising and sustainable options for power generation [4,5]. Photovoltaic grid-connected systems often adopt the LCL filter as the output filter to filter out high-frequency harmonics and improve the quality of the output electrical energy [6]. The LCL filter circuit has inherent resonant peaks.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Suppression of Harmonic Resonance in Photovoltaic Grid-Connected Systems

Zhu,

Huang,

Ouyang

et al. 2024

Energies

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In photovoltaic grid-connected systems, the interaction between grid-connected inverters and the grid may cause harmonic oscillation, which severely affects the normal operation of the system. To improve the quality of the output electrical energy, photovoltaic grid-connected systems often use LCL filters as output filters to filter out high-frequency harmonics. Taking the three-phase LCL-type photovoltaic grid-connected inverter system as an example, this paper addresses the issue of harmonic resonance. Firstly, based on the harmonic linearization method and considering the impact of the coupling compensation term on the grid-side voltage, a modular positive and negative sequence impedance modeling method is proposed, which simplifies the secondary modeling process of the converter under feedback control. Then, the stability analysis is conducted using the Nyquist criterion, revealing the mechanism of high-frequency resonance in photovoltaic grid-connected systems. Furthermore, this paper delves into the impact of changes in system parameters on impedance characteristics and system stability. The results indicate that the proportional coefficient of the internal loop current controller has a significant influence on system impedance characteristics. Additionally, this paper proposes an active damping design method that combines lead correction and capacitor current feedback to impedance-reconstruct the easily oscillating frequency band. Finally, the effectiveness of this method is verified in the simulation platform. Simulation results confirm the effectiveness of this method in suppressing harmonic resonance while maintaining rapid dynamic response.

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Section: Introductionmentioning

confidence: 99%

Analysis and Suppression of Harmonic Resonance in Photovoltaic Grid-Connected Systems

Zhu,

Huang,

Ouyang

et al. 2024

Energies

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show abstract

“…In the testing of electric drive systems for vehicles, the EME system for permanent magnet synchronous motors (PMSM) plays a key role in promoting the decoupling of MDU development and motor development, which has become a research hotspot in the field of new energy vehicles [4][5] . The interface is a key component of the EME system, which determines the stability and simulation accuracy 6 . Compared with the commonly used L-type interface, the LCL-type (consists of inductor-capacitor-inductor) interface has higher bandwidth and better filtering performance, which is a superior interface topology with prominent research value in EME systems 7 .…”

Section: Introductionmentioning

confidence: 99%

Design of the electric machine emulator system with interface parameters based on multi-disciplinary cooperative optimization

Wang,

Tian,

Sun

2023

Eighth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2023)

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Robust Impedance Reshaping of Multiple Ongrid Inverters regarding Variable Grid Conditions

Yang

Yin

Tao

et al. 2021

2021 IEEE 16th Conference on Industrial Electronics and Applications (ICIEA)

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Modeling and Resonance Analysis of Parallel Grid-Connected Inverters with LCL Filters

Cited by 3 publications

References 18 publications

Analysis and Suppression of Harmonic Resonance in Photovoltaic Grid-Connected Systems

Analysis and Suppression of Harmonic Resonance in Photovoltaic Grid-Connected Systems

Design of the electric machine emulator system with interface parameters based on multi-disciplinary cooperative optimization

Robust Impedance Reshaping of Multiple Ongrid Inverters regarding Variable Grid Conditions

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