Improvement of Pulse Current Sensor for Power Transformer Partial Discharge Monitoring

摘要：

Ferromagnetic nanomaterials is used to made magnetic core of Rogowski coil, a pulse current sensor with perfect amplitude-frequency characteristic and wide frequency bandwidth for power transformer partial discharge(PD)monitoring is developed in the paper. A preamplifier circuit is also developed, it is applied for amplifying tiny(several millivolt), wide frequency bandwidth (1K～10MHz) signals. Test results show that the sensor has good linearity, small change on delay, fast step response and high sensitivity.

关键词： Partial discharge rogowski coil current sensor preamplifier circuit

作者: Gong Jie Zhou Lixing

作者单位: College of Electrical and Information Engineering,Changsha University of Science & Technology,Changsha 410077,China

会议类型: 国际会议

会议名称: The Second International Symposium on Test Automation & Instrumentation(ISTAI2008)(第二届国际自动化测试与仪器仪表学术会议)

会议地点: 北京

会议语种:英文

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）