The Effect of DC Field on Streaming Electrification in Converter Transformer

摘要：

Converter transformer plays an important role in the HVDC transmission system. The insulation in converter transformer withstands both the AC and DC voltage during operation, which is different from that in normal power transformer. In order to investigate the effect of DC electric field on streaming electrification in converter transformer, an oil/paper tube model with concentric cylindrical electrode geometry was built and the flow electrification under the DC electric field was investigated in laboratory. The results demonstrated that the energization by positive DC voltage can enhance the streaming electrification especially at high temperature. With the increment of temperature, the streaming current first increases and reaches a peak value, and then decreases at higher temperature. The flow velocity has a little effect on the streaming current in the low temperature region. However, in the high temperature region the increase of flow velocity greatly enhances the electrification. Furthermore, ion migration is the main reason that causes the flow electrification under the DC electric field.

关键词： DC field Flow electrification Converter transformer

作者: GAO Yuan CHEN Qingguo CHI Minghe WEI Xinlao WANG Yonghong

作者单位: Key Laboratory of Engineering Dielectrics and Its Application,MOE,Harbin University of Science and Technology,Harbin,China,

会议类型: 国际会议

会议名称: The 6th International Forum on Strategic Technology(IFOST 2011)(第六届国际战略技术论坛)

会议地点: 哈尔滨

会议语种:英文

页码: 604-608

在线出版日期: 2011-08-22（万方平台首次上网日期，不代表论文的发表时间）