并聯(lián)電感-電容支路對(duì)空氣電弧電流轉(zhuǎn)移特性的影響

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中圖分類(lèi)號(hào)：TM561 文獻(xiàn)標(biāo)志碼：A

DOI： 10.7652/xjtuxb202508016 文章編號(hào)：0253-987X（2025）08-0168-09

Influence of Parallel Inductance-Capacitance Branches on Current Commutation Characteristics of Air Arcs

ZHANG Yushi，WU Yi，SUN Hao，WU Yifei，RONG Mingzhe， LIU Tianxiao，KONG Ziyang （School of Electrical Engineering，Xi'an Jiaotong University，Xi'an 7loo49，China）

Abstract： To address the technical challenge of interrupting fault currents in direct current （DC） power systems，a DC interruption scheme based on the magnetic control oscillation characteristics of air arcs is proposed. Applying an external transverse magnetic field to the air arc within a narrow gap enables the arc voltage to oscillate periodically， thereby creating a negative damping oscillating current between the arc and the inductor-capacitor （LC） branch. This facilitates fault current transfer， ultimately achieving current interruption. Experimental studies are conducted on the current transfer process at the resonant frequencies of four parallel LC branches，and the effect of the transfer branch capacitance on the peak transfer current is analyzed for main circuit currents ranging from to . The results indicate that increasing the resonant frequency of the LC branch at a 5kA main circuit current can shorten the current transfer time to 0.84ms However，as the main circuit current increases，the resonant frequency of the LC branch needs to be adjusted to match the oscillation frequency of the arc to create a zero-crossing of the arc current. Increasing the capacitance of the transfer branch effectively enhances the initial peak transfer current，thereby boosting the current transfer capability. Additionally，the attenuation of the magnetic field during the current transfer process leads to a decreased rate of rise in arc voltage，affecting the continuity of the resonant current’s negative damping oscillation. This study validates the feasibility of the air arc magnetic control oscillation-based DC interruption scheme， providing a new approach for the design of economical DC circuit breakers.

Keywords： direct current interruption; air arc; external transverse magnetic field; current commutation;magnetically controlled oscillation

直流斷路器是直流電力系統(tǒng)中保障供電靈活性與可靠性的關(guān)鍵設(shè)備，當(dāng)系統(tǒng)發(fā)生故障時(shí)，斷路器需快速、可靠地實(shí)現(xiàn)故障電流的開(kāi)斷，以確保系統(tǒng)安全穩(wěn)定運(yùn)行[1-2]。（剩余12180字）