Analysis of Harmonic Compensation for Grid-Side Current of Series Sixfold-Circuit “Phase-Hopping” AC-AC Frequency Converter

IF 0.6 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Recent Advances in Electrical & Electronic Engineering Pub Date : 2023-06-05 DOI:10.2174/2352096516666230605150903

Jixin Yang, Zhengwang Xu, Jin Zhu, Jiarui Zhang, Shikang Shen

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引用次数: 0

Abstract

A series sixfold-circuit “phase-hopping” AC-AC frequency converter (SSCPH-AAFC) is an extension of traditional AC-AC frequency converters. Compared to traditional frequency converters, it has the advantages of energy-saving, low cost, and simple control. Additionally, it can increase the upper limit of the frequency conversion to the power frequency. Through multiplexing processing, it reduces the harmonic content of the output waveform, making it suitable for applications, such as large-capacity fan or pump speed control. Although SSCPH-AAFC reduces harmonic content, the harmonic content of the single-phase and three-phase grid-side currents still reach 14.65% and 10.20%, respectively. To meet national standards for practical application, a compensation circuit needs to be designed to further reduce grid-side current harmonics. To address harmonic problems, a targeted single-phase current open-loop compensation method was designed based on the analysis of the current waveform defect. The method compensated for harmonics by selecting appropriate trigger angles and reducing the harmonic distortion rate of the power grid to meet the necessary application standards. The method was simulated and analyzed using MATLAB, and the results showed that after single-phase open-loop compensation, the total harmonic distortion (THD) of the grid-side current for a single-phase SSCPH-AAFC was 2.64%, and for a three-phase SSCPH-AAFC, it was 1.80%. This method has a good effect and can meet the standard requirements.

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串联六路跳相交-交变频器电网侧电流谐波补偿分析

串联六路跳相交流变频器(SSCPH-AAFC)是传统交流变频器的扩展。与传统变频器相比，具有节能、成本低、控制简单等优点。此外，它可以提高频率转换到工频的上限。通过多路复用处理，降低了输出波形的谐波含量，使其适用于大容量风机或泵转速控制等应用。SSCPH-AAFC虽然降低了谐波含量，但电网侧单相和三相电流的谐波含量仍分别达到14.65%和10.20%。为了满足实际应用的国家标准，需要设计补偿电路来进一步降低电网侧电流谐波。针对谐波问题，在分析电流波形缺陷的基础上，设计了一种有针对性的单相电流开环补偿方法。该方法通过选择合适的触发角度和降低电网谐波畸变率来补偿谐波，以满足必要的应用标准。利用MATLAB对该方法进行仿真分析，结果表明:单相开环补偿后，单相SSCPH-AAFC的电网侧电流总谐波失真(THD)为2.64%，三相SSCPH-AAFC的电网侧电流总谐波失真(THD)为1.80%。该方法效果好，能满足标准要求。

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来源期刊

Recent Advances in Electrical & Electronic Engineering ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

1.70

自引率

16.70%

发文量

101

期刊介绍： Recent Advances in Electrical & Electronic Engineering publishes full-length/mini reviews and research articles, guest edited thematic issues on electrical and electronic engineering and applications. The journal also covers research in fast emerging applications of electrical power supply, electrical systems, power transmission, electromagnetism, motor control process and technologies involved and related to electrical and electronic engineering. The journal is essential reading for all researchers in electrical and electronic engineering science.