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Three-phase rectifier sliding-mode control method based on extended state observer

A technology of a three-phase rectifier and control method, which is applied to the output power conversion device, the conversion of AC power input to DC power output, electrical components, etc., can solve the problems of large overshoot, poor anti-interference performance, slow response speed, etc.

Active Publication Date: 2019-11-08
TIANJIN NAVIGATION INSTR RES INST
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Problems solved by technology

[0006] The purpose of the present invention is to provide a three-phase rectifier sliding mode control method based on an extended state observer to solve the problems of poor anti-interference performance, slow response speed and large overshoot in the three-phase rectifier control method in the prior art. question

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  • Three-phase rectifier sliding-mode control method based on extended state observer
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  • Three-phase rectifier sliding-mode control method based on extended state observer

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Embodiment Construction

[0083] The present invention will be described in further detail below with reference to the drawings and specific embodiments. The following embodiments are only descriptive and not restrictive, and the protection scope of the present invention cannot be limited by this.

[0084] A sliding mode control method of three-phase rectifier based on extended observer, please refer to Figure 1-11 , Its invention is: the realization process is as follows:

[0085] S1: Establishment of dynamic model of three-phase rectifier circuit

[0086] The three-phase rectifier model (three-phase rectifier topology) in the present invention is as follows figure 1 Shown:

[0087] The three-phase voltage passes through the filter inductance L and the resistance r, the three-phase bridge rectifier realizes AC / DC (AC-DC) conversion, and the external load is connected in parallel with the DC side capacitor C. The system parameters are shown in Table 1:

[0088] Table 1 System parameters

[0089]

[0090]

[00...

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Abstract

The invention relates to a three-phase rectifier sliding-mode control method based on an extended state observer (ESO), comprising a three-phase rectifier main circuit in which a three-phase voltage is subjected to AC / DC conversion through a filter inductor L, a resistor r and a three-phase bridge rectifier and an external load is connected in parallel with a DC-side capacitor C and which comprises a controller for the on-off control of the three-phase bridge rectifier, wherein the outer loop of the controller is a voltage loop based on an ESO, and the inner loop of the controller is a powerloop using a super-twisting algorithm. The control method comprises the steps of: S1, establishing a three-phase rectifier circuit dynamic model; S2 designing the controller: a) designing the power loop by using the super-twisting algorithm, and b) designing the voltage loop based on the ESO. The control method applies the super-twisting algorithm and the ESO to the control of the three-phase rectifier, solves the system buffeting, and improves system robustness and stability.

Description

Technical field [0001] The invention belongs to the technical field of power electronic control, and relates to the control of a three-phase rectifier, in particular to a three-phase rectifier sliding mode control method based on an extended state observer. Background technique [0002] Three-phase rectifiers have the advantages of high power density, small current fluctuations, and fast response speed, which make them play an increasingly important role in industrial production, such as smart grids, electric vehicles, and energy storage systems. Research on modulation technology, topology and control algorithm of three-phase rectifiers has become a research hotspot in the field of power electronics. Sliding mode control, predictive control, and fuzzy control have been well applied in this circuit topology. The application of fuzzy control requires a long trial and error process and is suitable for situations where the system parameters are unknown. The application of predictiv...

Claims

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Application Information

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IPC IPC(8): H02M7/219
CPCH02M7/2173H02M7/219
Inventor 郭婷婷邓丽辉缪子超魏江峰段昊昱柴林
Owner TIANJIN NAVIGATION INSTR RES INST
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