Event-triggered MPC Scheme for Inverters Considering Filter Performance

The event triggered (ET) mechanism based on sampled data can effectively reduce the computational burden and hardware cost of the model predictive control (MPC) strategy of the grid-connected inverter, while ensuring the robustness of the system. However, the selection of ET parameters is closely related to the selection of filters. Based on this, this paper studies the ET-MPC strategy of the two-level grid-connected inverter based on the LC-type filter, and derives the trigger boundary under the action of the LC-type filter as its selection basis according to the principle of inequality constraints. A suitable trigger boundary can not only reduce switching losses, but also improve the accuracy of the system. The simulation in MATLAB/SIMULINK verifies the correctness of the selection of the trigger boundary of the LC-type filter, and compares the effects of ET parameters on the output performance and switching times of the inverter system under the action of the single L-type and LC-type filters.