ON THE ISSUE OF MICROGRID CONTROL WITH WIND ENERGY SYSTEMS AND PV USING AN LC FILTER
DOI:
https://doi.org/10.47526/3135-6877.132Keywords:
microgrid, LC filter, wind energy system, photovoltaic system, inverter, harmonics, power quality, THD, distributed generation.Abstract
This paper addresses the problem of improving power quality in a microgrid that integrates renewable energy sources, specifically wind energy systems (WES) and photovoltaic (PV) installations, through the application of an LC filter at the output of an inverter-based distributed generation unit. The study examines the fundamental physical principles of LC filter operation, including its frequency response characteristics and its role in mitigating high-frequency harmonics generated by power electronic converters. Special attention is given to the influence of the LC filter on the overall stability and dynamic performance of the microgrid under varying load conditions.
An engineering design and calculation of LC filter parameters are carried out for a 220 V microgrid with a rated power of 3 kW and a pulse-width modulation (PWM) frequency of 10 kHz. The results demonstrate that appropriately designed filter parameters ensure attenuation of high-frequency harmonics exceeding 50 dB, significantly reducing the total harmonic distortion (THD) of the output voltage. Furthermore, the proposed approach contributes to improved voltage waveform quality and enhanced reliability of the microgrid. The findings confirm the effectiveness and practical applicability of LC filters in distributed generation systems based on renewable energy sources.
References
J. Xu, S. Xie, “LCL resonance damping strategies for grid connected inverters with LCL filters: A comprehensive review,” Journal of Modern Power Systems and Clean Energy, 2018.
L. Zhang, H. Li, X. Gu, “H∞ filter based active damping control strategy for grid connected inverters with LCL filters,” International Journal of Electrical Power & Energy Systems, 2022.
S. Lim, D. Hong, H. Cha, “Adaptive notch filter based active damping technique for inverter LCL filters,” Journal of Power Electronics, 2026.
V. G. Agelidis, et al., “Passive damped LCL filter design for grid converters,” IEEE Trans. Ind. Electron., 2015.
Rustamov N.T., Mejrbekov A. T., Avezova N.R., Meirbekova O.D., Babahan Sh. A. (2023). Gibridnaya sistema dlya vyrabotki teplovoj i elektricheskoj energii. Patent RK na poleznyj model № 7970 ot 24.11.2023.
Rustamov N., Meirbekova O., Babakhan Sh. (2025). Distributed storage of electrical energy in an oscillating circuit. // International scientific-technical conference «National energy Independence in the age of renewable energy and digital technologies: Innovations, prospects and social impact in the Fergana region», Ferganа. рр. 400 -407.
M. Molinas, A. Blaabjerg, “State feedback active damping for LCL filters in microgrids,” IEEE Trans. Power Electron., 2017.
R. Teodorescu et al., “Grid converter control strategies in islanded microgrids,” IEEE Trans. Smart Grid, 2019.
H. Eldeeb et al., “Kalman filter based active damping for grid tied VSI with LCL filter,” Int. J. Electr. Power & Energy Systems, 2017.
Y. Miura, “Grid forming control of inverters with LCL filters in autonomous microgrids,” Renewable Energy, 2021.
P. Rodriguez, “Grid forming strategies for islanded inverter systems,” IEEE Trans. Power Deliver., 2020.
X. Wang et al., “Adaptive neural controller for LCL resonance suppression,” Engineering Applications of AI, 2023.
M. Tse, “LQG/LQR optimal control for active damping in power converters,” Control Engineering Practice, 2018.
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