大型换流变压器油流带电问题的分析
张燕秉，郑 劲，聂定珍
（北京网联直流工程技术有限公司，北京市 东城区100005）
Analysis on Oil-Flow Electrification Phenomenon in Large Scale
Converter Transformer and Its Countermeasures
ZHANG Yan-bing，ZHENG Jin，NIE Ding-zhen
(Beijing Wanglian HVDC Engineering Technology Co. Ltd.，Dongcheng District，Beijing 100005，China)

ABSTRACT：Oil-flow electrification may endanger the
insulation property of oil lines in large-scale converter
transformer and becomes one of harmful factors that damages
UHV transformers and even affects the secure and stable
operation of power grid. Under special insulation structure and
cooling means of oil, it is clear that there may be more oil
electrification problems in converter transformer. By means of
analyzing the production mechanism, influencing factors and
suppressing measures of oil-flow electrification as well as
structural features of converter transformers, the phenomenon
of oil-flow electrification in converter transformer is researched.
Research results show that the most important measures to
mitigate the extent of oil-flow electrification are decreasing oil
speed and improving the design of insulation structure,
especially the structure of oil lines. By means of full-voltage
no-load test and other approaches, whether the extent of
oil-flow electrification is serious or not can be verified and
monitored, in addition, adding conductivity modulator or
charge suppressing agent in insulating oil can also decrease the
trend of oil-flow electrification.
KEY WORDS：oil-flow electrification；converter transformer；
high voltage technology
摘要：油流带电可能破坏换流变压器的油道绝缘性能，成为
威胁超高压变压器甚至影响电网安全、稳定运行的重要因素
之一，在特殊的绝缘结构和油冷却方式下，换流变压器中可
能存在较多的油流带电问题。通过分析油流带电的产生机
理、影响因素、抑制措施和换流变压器的结构特点，研究了
换流变压器的油流带电问题。研究表明，降低油速和改善绝
缘(特别是油道)设计是减少油流带电问题的最重要措施。开
展全电压空载试验等可检验、监测换流变压器的油流带电问
题是否严重，此外，向绝缘油中添加电导率调节剂或电荷抑
制剂也可降低油流带电的倾向。
关键词：油流带电；换流变压器；高电压技术