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A new anti-disturbance method for three-phase voltage-type pwm converter based on deadbeat control

A deadbeat control, three-phase voltage technology, applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components and other directions, can solve problems such as poor stability

Active Publication Date: 2021-03-26
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly solves the problem of poor stability when the system is disturbed

Method used

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  • A new anti-disturbance method for three-phase voltage-type pwm converter based on deadbeat control
  • A new anti-disturbance method for three-phase voltage-type pwm converter based on deadbeat control
  • A new anti-disturbance method for three-phase voltage-type pwm converter based on deadbeat control

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Embodiment Construction

[0016] The specific content of the present invention will be described in detail in conjunction with the accompanying drawings. Three-phase voltage type PWM converter main circuit topology figure 1 The technical solution used in the present invention is: a new method based on the three-phase voltage type PWM converter, the three-phase voltage type PWM converter, and the specific steps are:

[0017] (1) Establish a mathematical model of three-phase voltage type PWM converter

[0018] In the synchronous rotation DQ coordinate system, the mathematical model of the three-phase voltage type PWM converter is established:

[0019]

[0020] U.S. dc And C is DC-side bus voltage and DC filter capacitance, respectively.

[0021] Put the formula (1)

[0022]

[0023] In T s For the sampling cycle.

[0024] The purpose of the differential control is to make the DQ axis current reach a given value at the k + 1, ie d (k + 1), i q (k + 1) is k + 1 time DQ axis current given value Therefore,...

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Abstract

The invention discloses a novel anti-disturbance method of a three-phase voltage type PWM (pulse width modulation) converter based on dead beat control. The method comprises the steps of: performing dispersion on a current formula under a dq coordinate system to obtain a dq axis current prediction model; in order to enable the dq axis current to follow a given value and achieve the dead beat control, making the actual value of the dq axis current at the next moment equal to the given value at the same moment; and adding the predicted d-axis voltage and the compensation voltage obtained by a disturbance compensator to obtain a result, and obtaining a switching signal for controlling the power device through the action of SVPWM according to the result and the predicted d-axis voltage. When the three-phase voltage type PWM converter is interfered, the method provided by the invention is applied to achieve the purpose of stable operation of the system.

Description

Technical field [0001] The present invention belongs to the technical field of power electron power conversion device, and more particularly to a new method of antibreading of three-phase voltage type PWM converters based on access control. Background technique [0002] With the development of electricity electronic technology, various electric energy converters with pulse width modulation (PWM) technology are generally applied to industrial and life. Among them, the three-phase voltage type PWM converter has been widely used by the advantages of the network side current sinusoidalization, and DC bus voltage adjustable. [0003] In the application of the three-phase voltage type PWM converter, the advantages of the current loop control performance is one of the main factors affecting the quality of electric energy. The traditional double closed loop control method is designed to a PI regulator. While PI control optimizes the spectral distribution of the PWM converter output volta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219
CPCH02M7/219
Inventor 施艳艳杨岚张毅
Owner HENAN NORMAL UNIV