| GUO Jian-bao,CUI Peng-fei,GUAN Sheng-li,WANG Guang-wu,WANG Hai-jun,CHEN Jian-ye,HUANG Ke-feng,GENG Man,FU Yu-xiang,YANG Wei-long,WU An-bing,DENG long-long.Study on Scaling Mechanism of Piezoelectric Balance Electrode of HVDC Converter Valve[J],48(10):285-291 |
| Study on Scaling Mechanism of Piezoelectric Balance Electrode of HVDC Converter Valve |
| Received:May 07, 2019 Revised:October 20, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.10.035 |
| KeyWord:Converter valve, Piezoelectric equalizing electrode, Corrosion, Scaling Mechanism |
| Author | Institution |
| GUO Jian-bao |
1.Maintenance & Test Center of CSG EHV Power Transmission Company, Guangzhou , China |
| CUI Peng-fei |
1.Maintenance & Test Center of CSG EHV Power Transmission Company, Guangzhou , China |
| GUAN Sheng-li |
2.Goaland Energy Conservation Tech. Co. Ltd, Guangzhou , China |
| WANG Guang-wu |
2.Goaland Energy Conservation Tech. Co. Ltd, Guangzhou , China |
| WANG Hai-jun |
1.Maintenance & Test Center of CSG EHV Power Transmission Company, Guangzhou , China |
| CHEN Jian-ye |
3.Department of Electrical Engineering, Tsinghua University, Beijing , China |
| HUANG Ke-feng |
2.Goaland Energy Conservation Tech. Co. Ltd, Guangzhou , China |
| GENG Man |
2.Goaland Energy Conservation Tech. Co. Ltd, Guangzhou , China |
| FU Yu-xiang |
2.Goaland Energy Conservation Tech. Co. Ltd, Guangzhou , China |
| YANG Wei-long |
2.Goaland Energy Conservation Tech. Co. Ltd, Guangzhou , China |
| WU An-bing |
2.Goaland Energy Conservation Tech. Co. Ltd, Guangzhou , China |
| DENG long-long |
1.Maintenance & Test Center of CSG EHV Power Transmission Company, Guangzhou , China |
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| Abstract: |
| By studying the scaling mechanism of equalizing electrodes in the cooling system of converter valves, the scaling process, influencing factors and forming rules are analyzed, and the basic causes of corrosion and scaling are summarized. Based on the results of the research, the comprehensive treatment measures for scaling of equalizing electrodes are formed to improve the technical scheme. Through literature analysis and summary of the research progress of equalizing electrodes at home and abroad, find out the related factors of scaling of equalizing electrodes, and then through test verification, clear the main process of scaling of equalizing electrodes and the main factors affecting scaling. Finally, according to the experimental conclusions, put forward reasonable anti-corrosion measures to inhibit or reduce scaling. The results show that the main factors affecting scaling of equalizing electrodes are electrochemical corrosion and fluid erosion corrosion of aluminum radiators. The corrosion products converge and deposit at the equalizing electrodes, resulting in scaling. The scaling process is as follows: the chemical corrosion on the inner surface of radiator and the wear corrosion caused by fluid surge are synergistic and mutually reinforcing, resulting in the transformation of aluminum elements into ionic forms and entering the cooling medium of circulating system, which are adsorbed to the surface of the electrode due to the electric field of the equalizing electrode, and over time, the formation of a junction on the surface of the electrode. Scaling of equalizing electrodes is related to electrochemical corrosion and fluids scouring in water cooling system. Scaling ions in cooling water can be removed by deep desalination, which can effectively slow down scaling of equalizing electrodes. |
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