The Bộ điều khiển kháng nhiễu dựa trên chế độ trượt và khâu quan sát trạng thái cho bộ biến đổi ba pha ba mức hình T trong chế độ chỉnh lưu tích cực
Keywords:
Active rectifier, T-type rectifier, State Observer, Linear matrix inequality, Fixed-time sliding-mode control, Disturbance observer, Proportional-Integral controlAbstract
Bài báo này trình bày một chiến lược điều khiển chế độ trượt (SMC) mới cho bộ chỉnh lưu ba pha ba cấp loại T (3LT 2). First, a state observer (SOB) was designed based on linear matrix inequality (LMI) to identify the optimal eigenvalues of the state-tracking error function. Second, fixed-time sliding mode control (FTSMC) was constructed to control the system. Third, a disturbance observer (DOB) was designed based on the error signals of the system outputs and observer outputs. The output signals precisely converged to the predefined trajectories in a very short time, with small overshoots and steady-state errors. Fourth, the Lyapunov condition was used to verify the corrections of the proposed controller and observer. The simulation by using Matlab Simulink software was used to show the power of the proposed methods and was compared with the PI (Proportional-Integral) controller.
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