基于直流侧无源电压谐波注入法的串联型24脉波整流器

doi:10.19595/j.cnki.1000-6753.tces.180265

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Abstract In order to suppress the input current harmonics of multi-pulse rectifier, this paper proposes a voltage harmonic injection method at DC side for series-connected 12-pulse rectifier. The proposed method uses harmonic injection circuit to generate voltage harmonic, which has six times the supply frequency, so that the waveform of the input current is approximately sinusoidal. With the help of the switching function method, the formation process of the 24 step wave input voltage of isolation transformer is analyzed. The optimum turn ratio of injection transformer is designed based on the lowest THD of the input voltage of isolation transformer. Simulation and experimental results show that, after using the harmonic injection circuit, the input power factor of the rectifier is increased from 97.43% to 98.94%, thus the power quality has been improved significantly, the input voltage of isolation transformer is changed from 12 step wave to 24 step wave, its THD drops from 9.74% to 3.34%, and the THD of input current drops from 7.62% to 2.65%, the harmonic suppression performance of the rectifier has been significantly improved.

Key words： Series-connected multi-pulse rectifier current source converter passive harmonic reduction injection transformer constant-voltage load

Received: 05 March 2018 Published: 29 March 2019

PACS:

TM461.3

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	Meng Fangang
	Wang Lin
	Gao Lei
	Sun Zhengnai
	Yang Shiyan

Cite this article:

Meng Fangang,Wang Lin,Gao Lei等. A Series-Connected 24-Pulse Rectifier with Passive Voltage Harmonic Injection Method at DC Side[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1180-1188.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180265 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I6/1180

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通信作者:孟凡刚男,1982年生,博士,副教授,研究方向为电能变换及其控制.E-mail: mfg0327@sina.com