A new Kalman-filter-based harmonic current suppression method for the virtual oscillator controlled voltage source converters with LCL filterA new Kalman-filter-based harmonic current suppression method for the virtual oscillator controlled voltage source converters with LCL filter Πλήρης Δημοσίευση σε Συνέδριο Conference Full Paper 2023-05-152021enThis work has been performed within the framework of the project “eSOLAR: Principle and control of high-efficiency Buck-Boost type Photovoltaic inverter” of the program “Bilateral and Multilateral Research & Technology Cooperation between Greece and China”. In Greece, this project was funded by the Operational Program “Competitiveness, Entrepreneurship and Innovation 2014-2020” (co-funded by the European Regional Development Fund) and managed by the General Secretariat of Research and Technology, Ministry of Education, Research, and Religious Affairs under the project eSOLAR/T7ΔKI-00066.Virtual Oscillator Control (VOC) is a new control strategy applied to grid-connected inverters, which can achieve fast dynamics and low harmonics in island mode. This paper proposes a new harmonic currents elimination strategy for virtual oscillator controller (VOC)-based voltage source converters (VSC) connected to a distorted electrical grid. In order to achieve the control goal, the Kalman filter is used to replace the traditional band-pass filter to extract the harmonic components of the grid voltage at the common coupling point (PCC). From the impedance-based analysis, the equivalent output impedance of the DC/AC inverter has been significantly enhanced at the selected low harmonic frequency. It is worth noting that the system can remain stable within a considerable range of equivalent grid impedance. Simulation results in MATLAB/Simulink have verified the effectiveness of the proposed method.http://creativecommons.org/licenses/by/4.0/316-3222021 IEEE Energy Conversion Congress and Exposition Luo Siyi Wu Weimin Koutroulis Eftychios Κουτρουλης Ευτυχιος Blaabjerg, Frede, 1963- Chung Henry Shu-Hung Institute of Electrical and Electronics Engineers Microgrids Virtual oscillator control Harmonic suppression Kalman filter