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A Two-stage Finite Set Model Predictive Control Method

A finite set model and predictive control technology, applied in the direction of output power conversion devices, climate sustainability, high-efficiency power electronics conversion, etc., can solve the problems of high harmonic distortion rate and large current ripple, and reduce switching loss , Reduce the output current ripple, reduce the effect of output current harmonic distortion rate

Active Publication Date: 2021-10-12
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology

[0003] Purpose of the invention: In order to solve the problems of high harmonic distortion rate and large current ripple when the traditional single-vector FCS-MPC acts on the two-level inverter, the present invention proposes a two-stage finite set model predictive control method

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  • A Two-stage Finite Set Model Predictive Control Method
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  • A Two-stage Finite Set Model Predictive Control Method

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Embodiment Construction

[0053] Below in conjunction with the accompanying drawings, the present invention will be further described with the two-stage FCS-MPC control when the two-level inverter has a resistive load. The specific implementation steps of the present invention are as follows:

[0054] A two-stage finite set model predictive control method, the method includes the following steps:

[0055] (1) to t k The output current of the inverter is sampled at any time to obtain the actual value of the current [i α (t k ), i β (t k )], the subscripts α, β refer to the two-phase stationary coordinate system α-β coordinate system, i α (t k ) is the actual value at the beginning of the K period of the α-coordinate axis, i β (t k ) is the actual value at the beginning of the K period of the β coordinate axis, and the two switching vectors selected for the K-1 period act on the inverter in the K period, and the first vector acts on t 1 (K) time, the second vector action t 2 (K) time, to perform...

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Abstract

The present invention proposes a two-stage finite set model predictive control method. First, the first vector of the forecast cycle is selected as the second switch vector of the previous cycle, and no switch switching occurs at the beginning of each sampling cycle. Switching loss, that is, each sampling period acts on two switching vectors but only one switching switching; secondly, according to the principle that the switching vector action time is inversely proportional to the action error, the corresponding effects of different combinations of the first switching vector and all effective switching vectors are calculated respectively Finally, according to the corresponding action time of different switch combinations, the two-stage current output prediction is carried out, and a group of switch combinations with the best current followability is selected as the final output of the system, so as to determine the second switch vector of the prediction period, and the two The action time corresponding to each vector.

Description

technical field [0001] The invention belongs to the technical field of two-level inverter control, and in particular relates to a two-stage finite set model predictive control method. Background technique [0002] The finite control set model predictive control (FCS-MPC) technology has the advantages of intuitive modeling, simple control, multi-objective optimal control, and no PWM modulator and PI parameter adjustment. The main research direction of controller control strategy. The traditional single-vector FCS-MPC method selects the optimal switching vector based on the principle of minimum current tracking error, and the selected optimal switching vector acts on the inverter at the beginning of the next control cycle and acts on a complete cycle. Therefore, the traditional single-vector model Predictive control often has disadvantages such as high harmonic distortion rate and large current ripple. Therefore, the present invention proposes a two-stage finite set model pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483
CPCH02M7/483H02M1/0054Y02B70/10
Inventor 王宇王贵峰朱拓基王远买迪尼古力·阿不都赛米
Owner XUZHOU NORMAL UNIVERSITY