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A Vector Repeat Control Method and System Based on Harmonic Sequence Extraction

A technology of repetitive control and harmonic components, which is applied to harmonic reduction devices, AC networks to reduce harmonics/ripples, AC network circuits, etc. The effect of not losing steady-state accuracy and speeding up dynamic response

Active Publication Date: 2021-12-17
HUAZHONG UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a vector repetitive control method and system based on harmonic sequence extraction, aiming to solve the problem of too slow dynamic response of repetitive control in the prior art

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  • A Vector Repeat Control Method and System Based on Harmonic Sequence Extraction
  • A Vector Repeat Control Method and System Based on Harmonic Sequence Extraction
  • A Vector Repeat Control Method and System Based on Harmonic Sequence Extraction

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

[0034] The present invention achieves the effect of speeding up the dynamic process by transforming the internal model of repeated control. In addition, the method also includes a new harmonic extraction method, which is a harmonic sequence extraction (HSE) based on the trigonometric function delay signal cancellation principle (Trigonometric Function Delay Signal Cancellation, TFDSC). Both the ...

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Abstract

The invention discloses a vector repetition control method and system based on harmonic sequence extraction. The method includes: extracting the harmonic sequence of the load current to obtain each harmonic sequence signal; performing vector repetition control on each harmonic sequence signal; The output obtained by vector repetitive control is superimposed, and six PWM signals are obtained through pulse width modulation. The PWM signal is input to the IGBT switch gate of the three-phase bridge arm to control the IBGT switch on and off, so that the converter outputs the desired current. . The invention separates the traditional repetitive control system into multiple relatively independent control loops according to the harmonic sequence, so as to significantly speed up the dynamic response speed of the system.

Description

technical field [0001] The invention belongs to the field of power electronics, and more specifically relates to a vector repetition control method and system based on harmonic sequence extraction. Background technique [0002] As a mature control method for power electronic converters, repetitive control can track or suppress periodic signals without static error, but one of its main defects is that the dynamic response is too slow. To solve this problem, many control methods have been researched and proposed. One method in the prior art is to use Proportional Inertial Multiresonant-type Repetitive Controller (PIMR-RC), by connecting a proportional gain in parallel on the basis of traditional repetitive control, to transform the original The purpose of the control object, thus speeding up the dynamic response and overall stability of the control system. However, this method does not make any changes to the interior of the repetitive controller, so it is still difficult to...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/18
CPCH02J3/01H02J3/1842H02J2203/20Y02E40/30Y02E40/40
Inventor 彭力胡科陈慢林
Owner HUAZHONG UNIV OF SCI & TECH