Research on the Influence of Air Gap on Heating of Anode Saturable Reactor in Converter Valves

ZHANG Hongwei

doi:10.14044/j.1674-1757.pcrpc.2026.02.009

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Research on the Influence of Air Gap on Heating of Anode Saturable Reactor in Converter Valves

POWER CAPACITOR & REACTIVE POWER COMPENSATION | Reactive Power Compensation and Filter

Research on the Influence of Air Gap on Heating of Anode Saturable Reactor in Converter Valves
气隙对换流阀阳极饱和电抗器发热影响研究
Jinchang Electric Power Company, State Grid Gansu Electric Power Company, Gansu Jinchang 737100, China
Vol. 47, Issue 2, Pages: 80-89(2026)
DOI：10.14044/j.1674-1757.pcrpc.2026.02.009
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ZHANG Hongwei. Research on the Influence of Air Gap on Heating of Anode Saturable Reactor in Converter Valves[J]. Power Capacitor & Reactive Power Compensation, 2026, 47(2): 80-89.
DOI：

ZHANG Hongwei. Research on the Influence of Air Gap on Heating of Anode Saturable Reactor in Converter Valves[J]. Power Capacitor & Reactive Power Compensation, 2026, 47(2): 80-89. DOI： 10.14044/j.1674-1757.pcrpc.2026.02.009.

摘要

阳极饱和电抗器的主要作用是限制电流变化率和浪涌电流、抑制电压变化率和浪涌电压、消除谐波和振荡、平滑波形，保障换流阀运行稳定性。阀电抗器运行中，受磁致伸缩效应、麦克斯韦力和洛伦兹力的长期共同作用，铁心振动会造成气隙变小、消失，导致铁心损耗增大、温度上升，严重危及换流阀安全。文章分析了铁心气隙脱离引起铁心损耗增大的案例，通过参数测量、振动测试、损耗测试、垫片状态检查等手段，探索气隙对损耗、温度、电动力等参数的影响，分析研究阀电抗器气隙与发热故障间的逻辑关系，提出了设计制造、日常运行、检修维护等阶段的改进措施，对保证阀电抗器、晶闸管等设备安全运行具有重要的借鉴和参考意义。

Abstract

The main function of the anode saturable reactor is to limit the rate of current change and surge current，suppress the rate of voltage change and surge voltage，eliminate harmonics and oscillations，smooth waveforms and assure operation stability of the converter valve. During the operation of valve reactors， vibration of the iron core，due to the long-term and combined effects of magneto striction，Maxwell force and Lorentz force，can cause the air gap to reduce or disappear，resulting in increase of iron core loss and rise of temperature，and seriously endangering the safety of the converter valve. In this paper，the case of increase of iron core loss due to the detachment of iron core air gap is analyzed. The influence of air gap on such parameters as loss，temperature，and electro dynamic force is explored through the means such as parameter measurement，vibration testing，loss testing，pad status inspection etc. The logical relationship between reactor air gap and heating faults of valve reactor is analyzed and studied，and the preventive measures at such different stages as design，manufacturing，daily operation，maintenance are proposed， whch have important reference and guidance significance for assuring safe operation of equipment such as valve reactors and thyristors.

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references

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