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Finite control set model predictive control method based on bivector effect

A technology of model predictive control and finite control set, applied in the direction of output power conversion device, electrical components, AC power input conversion to DC power output, etc., can solve the problems of steady-state performance limitation and achieve the effect of steady-state performance improvement

Active Publication Date: 2018-03-23
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the traditional finite control set model predictive control only acts on one switch combination in one sampling period, and the steady-state performance is limited.

Method used

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  • Finite control set model predictive control method based on bivector effect
  • Finite control set model predictive control method based on bivector effect
  • Finite control set model predictive control method based on bivector effect

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Embodiment Construction

[0029] The implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples, but the implementation and protection of the present invention are not limited thereto.

[0030] figure 1 Shown is a schematic diagram of a finite control set model predictive control method based on double vector action proposed by the present invention, the main steps are as follows:

[0031] The following takes a single-phase voltage-type inverter as an example to illustrate.

[0032] (S1) Select the output voltage U 0 (k), the filter inductor current i(k) is used as the state variable of the system, and the discrete time of the system is listed according to Kirchhoff Voltage Law (Kirchhoff Voltage Law, KVL) and Kirchhoff Current Law (Kirchhoff Current Law, KCL) The state equation:

[0033]

[0034] In the formula: d[] / dt represents the differential value of the state variable; L and C represent the filter inductance value and ...

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Abstract

The invention discloses a finite control set model predictive control method based on the bivector effect, and belongs to the field of power electronic current transformation control technology and industrial control. The method is formed by two links of voltage outer loop control and current inner loop control. Voltage outer loop control uses digital proportional-integral (PI) control and currentinner loop control uses the finite control set model predictive control method based on the bivector effect. The system calculates the optimal switching combination acting on the sampling period through the objective function and then successively acts on the optimal switching combination calculated by the last sampling period and the current sampling period for a period of time so that the predictive value is enabled to track the reference value as much as possible. According to the finite control set model predictive control method based on the bivector effect, the disadvantages of the conventional finite control set model predictive control method that only one voltage vector can be acted in one sampling period can be overcome so that the steady-state performance of the system can be enhanced and the working requirements of the power electronic system can be greatly met.

Description

technical field [0001] The invention relates to power electronic converter and industrial control technology, in particular to a finite control set model predictive control method based on double vector action, which belongs to the technical field of power electronic converter. Background technique [0002] Finite control set model predictive control is a research hotspot of predictive control at present. The finite control set model predictive control method has the advantages of easy to add nonlinear constraints, no modulator, and fast dynamic response. But the traditional finite control set model predictive control only acts on one switch combination in one sampling period, and the steady-state performance is limited. How to simultaneously act on multiple switch combinations in one sampling period to improve the stability of the system (the system refers to the implementation object of the control method, generally refers to the power electronic converter, and refers to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M7/5387
CPCH02M1/00H02M7/53873H02M1/0012H02M1/0025
Inventor 杜贵平黎嘉健刘源俊雷雁雄赖娜
Owner SOUTH CHINA UNIV OF TECH
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