Finite Control Set Model Prediction Control Method for Single Objective Three-Level Active Filter
A finite control set and model prediction technology, applied in active power filtering, circuit devices, AC network circuits, etc., can solve the problems of difficult selection of weight factors, large amount of calculation of weight factors, and influence on control dynamic performance. The amount of calculation, reducing the number of switch states, and improving the effect of dynamic response
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[0037] The main circuit topology of the three-level APF in this embodiment is as follows figure 1As shown, the three-level APF refers to the three-level active filter. The main circuit structure of the three-level APF includes: DC side capacitor C1 and capacitor C2, T j1 ~T j4 It is twelve IGBT switch tubes, where j=a, b, c, D 1 ~D 6 is six anti-parallel diodes, L is a three-phase output inductor, ignoring the resistance of the inductor itself, there are 27 different switch state combinations in three-level APF.
[0038] This embodiment is aimed at the three control objectives of three-level APF harmonic current compensation, DC side voltage stability and DC side midpoint potential balance, and only uses output current as a constraint item to achieve optimal control of the control objectives.
[0039] In this embodiment, the finite control set model prediction single-target three-level active filter control method includes:
[0040] A1: Realize the control of harmonic curr...
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