中国电力 ›› 2015, Vol. 48 ›› Issue (7): 59-62.DOI: 10.11930.2015.7.59

• 发电 • 上一篇    下一篇

某电厂主变压器油中腐蚀性硫问题分析及处理措施

王娟1,王笑微1,杨金星2,邵伟1   

  1. 1. 西安热工研究院有限公司,陕西 西安 710032;
    2. 天津国投津能发电有限公司,中国 天津 300480
  • 收稿日期:2015-05-07 出版日期:2015-07-25 发布日期:2015-11-26
  • 作者简介:王娟(1982—),女,陕西华阴人,工程师,从事电力用油(气)的研究及治理。E-mail: wangjuan@tpri.com.cn

Cause Analysis and Treatment of Sulfur Corrosion in Transformer Oil in a Power Plant

WANG Juan1, WANG Xiaowei1, YANG Jinxing2, SHAO Wei1   

  1. 1. Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710032, China;2. Tianjin SDIC Jinneng Electric Power Co., Ltd., Tianjin 300480, China
  • Received:2015-05-07 Online:2015-07-25 Published:2015-11-26

摘要: 某电厂1号、2号主变压器油击穿电压偏低,总烃含量持续升高。为找出问题所在,对油品进行了一系列试验,包括扫描电镜扫描、元素分析、X射线衍射分析及腐蚀性硫试验,其结果为变压器油中全硫及腐蚀性硫分较高,变压器油发生了硫腐蚀,含硫物质与绕组材料(铜)发生反应后生成黑色的Cu2S及Cu4SO4(OH)6,影响变压器的绝缘性能,导致油中总烃含量升高。再生处理并辅以添加钝化剂的方法可降低油中全硫和腐蚀性硫分,减缓硫对铜片的腐蚀。

关键词: 变压器油, 总烃, 腐蚀性硫, 再生处理, 钝化剂

Abstract: The breakdown voltages of transformer oil in Main Transformers 1 and 2 are low and their total hydrocarbon contents are continuously increasing. Therefore, a series of tests are performed to figure out the reasons. The tests include SEM, elemental analysis, X-ray diffraction analysis and corrosive sulfur tests. The results show that the total sulfur and corrosive sulfur contents in the oil are high, which causes sulfur corrosion, and a reaction of the sulfur-containing substance with winding material takes place, producing the Cu2S and Cu4SO4(OH)6, which affects the transformer’s insulating function and leads to the increasing of g the hydrocarbon contents. Recycling treatment and passivator adding to the oil can reduce the contents of total and corrosive sulfur and alleviate copper corrosion by sulfur.

Key words: transformer oil, total hydrocarbon, corrosive sulfur, regenerative treatment, passivator

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