Forming method for neural network inverse controller of active power filter

Abstract

The invention discloses a forming method for a neural network inverse controller of an active power filter, and the method comprises the following steps of: taking an inverter and an alternating current-side inductor of a main circuit of the active power filter as a whole to be formed into a controlled object, wherein the controlled object takes two switch function control quantity of the main circuit as input, and takes two compensating current components as output; according to an inverse system which corresponds to the controlled object, forming into neural network inversion by a static neural network and an integrator; equalizing the neural network inversion into a pseudolinear system consisting of two independent first-order integration type compensating current subsystems before the neural network inversion is connected with the controlled object in series; respectively designing two current controllers to the two independent first-order integration type compensating current subsystems in the pseudolinear system to form into a linear closed-loop controller; and connecting the linear closed-loop controller with the neural network inversion in series to be formed into a neural network inversion system method controller, so that an active power filter model can be nonlinearly controlled in a decoupling way at high performance, and the power quality of a power system can be improved.

Description

technical field [0001] The invention relates to a construction method of a neural network inverse controller of an active power filter, which is suitable for nonlinear decoupling control of an active filter in a power system and belongs to the technical field of power quality in a power system. Background technique [0002] With the increasingly higher requirements for power quality in the information age, harmonic suppression and reactive power compensation of power systems have become a hot spot in the field of power system research. The use of active power filters for harmonic and reactive power compensation is a future development trend. As a power electronic device that dynamically suppresses harmonics, active power filters can compensate for harmonics that change in frequency and size. . [0003] Since the model of the active power filter in the dq rotating coordinate system has nonlinear and parameter coupling problems, the inverse system method in the nonlinear syst...

AI Technical Summary

Problems solved by technology

The traditional analytical inverse decoupling control method relies heavily on the precise mathematical model of the system. When the system model parameters change, the decoupling conditions of the system will be destroyed, resulting in a decline in the performance of the control system, making the active power The analytical inverse control method of the filter system has a "bottleneck" in practical engineering applications

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