首页|高压直流输电换流阀冷却系统均压电极电化学除垢技术研究

高压直流输电换流阀冷却系统均压电极电化学除垢技术研究

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均压电极是高压直流输电换流阀冷却系统的关键设备,其结垢及垢样脱落可能阻塞内冷水循环回路甚至导致系统闭锁.对此,针对均压电极传统人工除垢效率低的问题,开展了高压直流输电换流阀冷却系统均压电极电化学除垢技术研究.首先,分析了高压直流输电换流阀冷却系统均压电极结垢机理,阐明了均压电极垢样各元素含量.其次,结合电化学装置阴极材料电流脉动脱垢思路,提出了一种利用气体压力的均压电极除垢策略.最后,进行均压电极电化学除垢效果测试,并对不同结垢厚度下的清洗液配比及除垢效率进行了分析.研究结果对高压直流输电换流阀冷却系统均压电极高效除垢和清洗工艺优化有定的指导价值.
Study on Electrochemical Descaling Technology of Equalizing Electrodes in HVDC Converter Valve Cooling System
Equalizing electrodes are key equipment in cooling systems of HVDC converter valve.The scaling and scale peeling of equalizing electrodes may result in blockage of internal cooling water circulation circuit and even system locking.In view of the low efficiency of conventional manual descaling process,the electrochemical descaling technology of equali-zing electrodes was studied in this work.First the scaling mechanism of equalizing electrodes was analyzed,and elemental composition of the scale sample was clarified.Second a descaling strategy utilizing gas pressure was proposed,which was inspired by the current pulse-assisted descaling adopted for cathode materials of electrochemical devices.Finally the desca-ling utility of the proposed technology was tested,and cleaning solution compositions and descaling efficiencies for scale layers with different thicknesses were determined and analyzed.The results of this work may contain useful information that facilitates high efficiency descaling and cleaning process optimization for equalizing electrodes of HVDC converter valve cooling systems.

equalizing electrodedescalingelectrochemistry

徐宏争、李阳

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南方电网超高压输电公司大理局,云南 大理 671000

均压电极 除垢 电化学

2024

电工技术
重庆西南信息有限公司(原科技部西南信息中心)

电工技术

影响因子:0.177
ISSN:1002-1388
年,卷(期):2024.(17)