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Optimal space vector PWM control method for three-phase inverter based on immune algorithm

A three-phase inverter, space vector technology, used in instruments, calculations, calculation models, etc.

Active Publication Date: 2012-11-28
WUHAN UNIV
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Problems solved by technology

[0005] Aiming at the defects of the existing PWM control technology, the present invention provides an optimal space vector PWM (SVPWM) control method for a three-phase inverter based on an immune algorithm,

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  • Optimal space vector PWM control method for three-phase inverter based on immune algorithm
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  • Optimal space vector PWM control method for three-phase inverter based on immune algorithm

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Embodiment Construction

[0059] The technical solution of the present invention can use computer software technology to realize the automatic operation process, and the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0060] The present invention is based on the immune algorithm, with figure 1 It is the flow chart of the immune algorithm, including coding operations, vaccine injection, and then iteratively performing calculation of affinity, calculation of concentration, immune selection, crossover operation, mutation operation, inversion operation, addition operation, and judging whether the new generation of individuals meets the requirements. Iterate until the requirements are met. The immune algorithm (IA) is an improved genetic algorithm (GA) based on the immune mechanism of living organisms. The immune algorithm corresponds to the problem to be solved as the antigen invading the biological mechanism, an...

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Abstract

The invention discloses an optimal space vector pulse width modulation (SVPWM) control method for a three-phase inverter based on an immune algorithm. The SVPWM optimizing problem of the three-phase voltage inverter is analyzed and studied; and the optimizing object is to optimize the output voltage waveform quality of the three-phase voltage inverter. Based on a conventional SVPWM control method of the three-phase voltage inverter and the application of the method, an optimizing scheme for optimizing a vector sequence and zero vector action time based on the immune algorithm is put forward according to the optimization freedom in the space voltage vector control of the three-phase voltage inverter; and in consideration of the optimizing effect and efficiency of the optimizing scheme, an optimal SVPWM control scheme is put forward. In addition, the invention takes a voltage weight total harmonic distortion (WTHD) as the standard for measuring the waveform quality by considering that a low order harmonic causes large influence and a high order harmonic causes small influence in an actual power system, so as to meet the actual condition better.

Description

technical field [0001] The invention relates to the technical field of inverter digital control, in particular to a novel three-phase inverter optimal space vector PWM control method based on an immune algorithm. Background technique [0002] With the continuous improvement of the performance of fully-controlled high-frequency and high-power power electronic devices, people's expectations for the performance and quality of inverters are also increasing, and the quality of inverter output waveforms has always been one of the focuses of scholars. . Therefore, in recent years, more and more attention has been paid to the research on the control strategy to improve the performance of the inverter. [0003] Comparing the carrier wave with the modulating wave, a set of rectangular pulse sequences with the same amplitude is obtained. These rectangular pulse sequences are used to be equivalent to the modulating wave, and their width is proportional to the function value of the modu...

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Application Information

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IPC IPC(8): H02M7/5387G06N3/00
Inventor 袁佳歆陈柏超田翠华费雯丽潘建斌张晨萌
Owner WUHAN UNIV
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