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Fuzzy sliding mode control method for matrix rectifier

A technology of fuzzy sliding mode control and matrix rectifier, which is applied in the direction of irreversible AC power input conversion to DC power output, etc., which can solve the problems of degraded control performance and unstable control system, and achieve the suppression of "chattering" phenomenon and fast dynamic response Performance, improved stability and reliability effects

Active Publication Date: 2014-06-04
INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
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Problems solved by technology

However, in the actual application process, the phenomenon of "chattering" inevitably exists in the sliding mode control. The "chattering" phenomenon not only deteriorates the control performance, but also may make the control system tend to be unstable.

Method used

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  • Fuzzy sliding mode control method for matrix rectifier
  • Fuzzy sliding mode control method for matrix rectifier
  • Fuzzy sliding mode control method for matrix rectifier

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] Matrix rectifiers can be divided into current type and voltage type according to the structure of the DC side. The current type presents the characteristics of a current source, and a large inductor is connected in series at the load end. The voltage type presents the characteristics of a voltage source, and a large capacitor is connected in parallel at the load end. The present invention illustrates the working principle of the control method by taking a voltage-type matrix rectifier modulated by a current space vector algorithm as an example.

[0027] The voltage-type SVM vector control is to obtain the target vector by combining two non-zero vectors.

[0028] The final target current vector is I ref → = T...

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Abstract

The invention discloses a fuzzy sliding mode control method for a matrix rectifier. The method adopts sliding mode variable structure control and has the advantages of being high in robustness, not sensitive to intrinsic parameter change and external disturbance, and good in dynamic performance. To soften the buffeting phenomenon occurring after a state trajectory reaches the sliding mode surface during sliding mode control, fuzzy control is introduced to sliding mode control, and on the premise that the excellent characteristics of sliding mode control are reserved, a fuzzy controller is designed through the combination of fuzzy logic and knowledge and experience, the control process is optimized, the buffeting phenomenon is effectively restrained, and an excellent control effect is achieved.

Description

technical field [0001] The invention relates to the technical field of matrix rectifier control methods, in particular to a fuzzy sliding mode control method applied to matrix rectifiers. Background technique [0002] Common control methods used by matrix rectifiers include: hysteresis loop comparison tracking control, PI current loop control, PI voltage loop control, etc. These control methods are less robust, and the dynamic response is slow when the external parameters change sharply, and at the same time, super tuning phenomenon. In order to improve the robustness of the control system and improve the dynamic performance, the sliding mode control is introduced. In this method, the control quantity is constantly switched through a certain control strategy, forcing the system to enter the sliding mode surface sliding in advance. Entering the sliding mode state, system parameter disturbance and external disturbance have no effect on the control system, and the stability a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/02
Inventor 王志平胡战虎皱兵汪暾杨坤徐驰张立平
Owner INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
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