A new control strategy with simplified model and Kalman filter estimator for grid-tied inverter with asymmetric LCL filterA new control strategy with simplified model and Kalman filter estimator for grid-tied inverter with asymmetric LCL filter Πλήρης Δημοσίευση σε Συνέδριο Conference Full Paper 2024-12-162022enIn grid-connected inverter systems, the three-phase asymmetric LCL (A-LCL) filter has outstanding characteristics of simple structure, almost the smallest total inductance, and the strong resistance to the adverse effects of parameter shifts. Nevertheless, the order of this kind of power filter is high, and the control model is complicated due to its asymmetric structure. In this paper, a simplified modeling method, which effectively reduces the system order is proposed, without affecting the control performance. Then, the Kalman filter estimation (KF-estimation) is adopted to reconstruct the PCC voltage. A 380 V/50 Hz/6 kW three-phase laboratory setup has been developed to verify the correctness and effectiveness of the proposed control strategy.This work was 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”, funded in Greece by the Operational Program.http://creativecommons.org/licenses/by/4.0/48th Annual Conference of the IEEE Industrial Electronics SocietyProceedings of the 48th Annual Conference of the IEEE Industrial Electronics Society Gao Chunxiao Wu Weimin Koutroulis Eftychios Κουτρουλης Ευτυχιος Chen Jianming Lu Gang Blaabjerg, Frede, 1963- Institute of Electrical and Electronics Engineers Asymmetric LCL filter Kalman filter estimation Simplified model strategy