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Control system and algorithm of PWM rectifier

A control system and rectifier technology, which is applied in output power conversion devices, conversion of AC power input to DC power output, and high-efficiency power electronic conversion. It can solve problems such as poor anti-interference ability and slow dynamic response, and achieve fast response speed. , fast and accurate control, the effect of small overshoot

Inactive Publication Date: 2021-08-31
ANHUI SANLIAN UNIV
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Problems solved by technology

[0005] In order to solve the technical problems of slow dynamic response and poor anti-interference ability of the PWM rectifier double closed-loop control algorithm in the prior art, the present invention provides a control system and algorithm of a PWM rectifier, and the specific scheme is as follows:

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  • Control system and algorithm of PWM rectifier
  • Control system and algorithm of PWM rectifier

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Such as Figure 1-2 As shown, a control system for a PWM rectifier includes a main circuit module 1, a coordinate conversion module 2, a PWM rectifier control module 3, and a coordinate inverse transformation module 4 that are sequentially arranged to form a closed loop, and also includes an output corresponding to the ...

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Abstract

The invention relates to the technical field of battery charging,and concretely relates to a control system and algorithm of a PWM rectifier. The system comprises a main circuit module, a coordinate conversion module, a PWM rectifier control module and a coordinate inverse transformation module which are sequentially arranged to form a closed loop. The PWM rectifier control module comprises a voltage sliding mode control unit, a current inner loop PI controller and a nonlinear decoupling module which are arranged in sequence. The control method has the advantages that after sliding mode control is adopted, the system can enter a stable state more quickly, the overshoot of the output voltage is smaller, the response speed is higher, and the PWM rectifier can be effectively, quickly and accurately controlled.

Description

technical field [0001] The invention relates to the technical field of battery charging, in particular to a control system and algorithm of a PWM rectifier. Background technique [0002] At present, three-phase voltage-type PWM rectifiers generally adopt double closed-loop PI control algorithms, that is, voltage outer loop PI control and current inner loop PI control. The active component and reactive component of the grid-side current of the rectifier are adjusted so that the phase of the grid-side voltage and current is the same, so that the power factor is equal to 1. This method mainly has the following technical disadvantages: [0003] 1. The PI algorithm has typical hysteresis characteristics, which makes the dynamic response performance of the double closed-loop control poor and the anti-interference ability is not strong. [0004] 2. When the system parameters change, it is difficult for the PI link to quickly follow the system response. Contents of the invention...

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Application Information

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IPC IPC(8): H02M7/217H02M1/42H02M1/44H02M1/00
CPCH02M1/00H02M1/4258H02M1/44H02M7/217Y02B70/10
Inventor 蒋龙云岳倩倩
Owner ANHUI SANLIAN UNIV
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