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A Predictive Current Control Method for Three-phase Voltage Type Pulse Width Modulation Rectifier

A technology of pulse width modulation and three-phase voltage, which is applied in the direction of converting irreversible AC power input into DC power output, etc., and can solve problems such as large structural dependence, sensitive system to structural parameter changes, loss of steady state, etc.

Active Publication Date: 2017-03-01
天津航空机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a three-phase voltage-type pulse width modulation rectifier predictive current control method to solve the problem that the traditional predictive current control method is highly dependent on the structure of the three-phase voltage-type pulse width modulation rectifier, and the structure parameters are sensitive to changes, which may easily cause the system to lose stability. state or even system crash

Method used

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  • A Predictive Current Control Method for Three-phase Voltage Type Pulse Width Modulation Rectifier

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Embodiment 1

[0039] figure 1 It is a flow chart of a method for controlling a predictive current of a three-phase voltage-type pulse width modulation PWM rectifier provided in Embodiment 1 of the present invention. image 3 It is a structural schematic diagram of the three-phase voltage-type pulse width modulation rectifier predictive current control main circuit and control circuit of the present invention.

[0040] This embodiment is applicable to the predictive current control of a three-phase voltage-type pulse width modulation rectifier, and the method may be performed by a device for predictive current control of a three-phase voltage-type pulse width modulation rectifier, specifically including the following operations:

[0041] Step 101, detecting the three-phase AC voltage, three-phase AC current and DC bus voltage of the three-phase voltage pulse width modulation rectifier;

[0042] Wherein, the three-phase voltage-type pulse width modulation rectifier is a three-phase voltage-t...

Embodiment 2

[0060] figure 2 It is a flowchart of a method for predicting current of a three-phase voltage-type pulse width modulation rectifier provided in Embodiment 2 of the present invention. image 3 It is a structural schematic diagram of the three-phase voltage-type pulse width modulation rectifier predictive current control main circuit and control circuit of the present invention.

[0061] This embodiment is applicable to the predictive current control of a three-phase voltage-type pulse width modulation rectifier, and the method can be performed by a three-phase voltage-type pulse width modulation rectifier predictive current device, specifically including the following operations:

[0062] Step 201, detecting the three-phase AC voltage, the three-phase AC current and the DC bus voltage of the three-phase voltage pulse width modulation rectifier;

[0063] Wherein, the three-phase voltage-type pulse width modulation rectifier is a three-phase voltage-type PWM rectifier; the thre...

Embodiment 3

[0095] image 3 It is a schematic diagram of the predictive current control device of the three-phase voltage type pulse width modulation rectifier of the present invention. Such as image 3 As shown, the schematic diagram mainly includes inductors, capacitors, resistors and semiconductor triodes in the traditional three-phase circuit and the peripheral circuit of the three-phase circuit; in addition, the schematic diagram also includes a structural schematic diagram of the three-phase voltage pulse width modulation rectifier predictive current control device

[0096] The structure of the three-phase voltage pulse width modulation rectifier prediction current device includes: a parameter detection module 301, a Clarke transformation module 302, a bus difference module 303, a voltage outer loop module 304, a current inner loop module 305 and a space vector pulse width modulation module 306.

[0097] Wherein, the parameter detection module 301 is used to detect the three-phase...

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Abstract

The invention discloses a three-phase voltage pulse width modulation rectifier prediction current control method. The method includes detecting three-phase alternating current voltage, three-phase alternating current and direct current bus voltage of a three-phase voltage pulse width modulation rectifier; converting the voltage into voltage sampling values and current sampling values under a two-phase static coordinate system through Clark conversion; calculating the difference value between the direct current bus voltage and the direct current bus voltage command; utilizing a voltage outer ring controller to acquire the simultaneous active power command value of the rectifier; setting a value function according to the power tracking error to meet the value function minimum analysis and calculate the current component predicted under the two-phase static coordinate system to further obtain the expected on-off voltage component under the two-phase static coordinate system; utilizing the space vector pulse width modulation technology to obtain the rectifier on-off expected function. By means of the method, the dependency of the traditional prediction current control method on the structure parameters of the rectifier can be effectively eliminated.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of control of voltage-type pulse width modulation rectifiers, and in particular to a method for predictive current control of a three-phase voltage-type pulse width modulation rectifier. Background technique [0002] At present, the three-phase voltage-type pulse width modulation rectifier has been widely used in the fields of electric power, transportation, and aerospace. The rectifier has the advantages of sinusoidal current, high power factor, and bidirectional flow of energy. [0003] The traditional three-phase voltage-type pulse width modulation rectifier predictive current control method adopts a double closed-loop structure, the outer loop uses a DC bus voltage controller, and the inner loop obtains the desired switching voltage vector. This type of double closed-loop structure has the advantages of small current harmonics, stable switching frequency, and good static performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12
CPCH02M7/12
Inventor 尚艳强张承良
Owner 天津航空机电有限公司