摘要
变压器局部放电常用检测方法包括脉冲电流法、油中溶解气体分析(DGA)法、超声波法、无线电干扰电压(RIV)法、光测法、射频检测法及化学方法等。在上述方法分析的基础上,根据电晕放电的紫外光特性提出了用紫外脉冲检测变压器内部放电的新方法。分析了变压器电晕放电与紫外光特性的关系、紫外光在变压器内部的传播特性,论证了电晕放电的紫外脉冲法检测原理,提出了变压器内部电晕放电故障定位方法,设计了紫外脉冲监测方法并进行了实验验证。结果表明,紫外脉冲法可用于变压器电晕放电的在线监测。
Regular methods for detecting partial discharge of transformers include the pulse electric current,the dissolved gas analysis（DGA）,the ultrasound,the radio interference voltage（RIV）,the light detection,the radio frequency,the chemical method,etc.According to the principle of the above methods and the characteristic of ultraviolet ray of corona discharge,a new detection method for discharge of transformers based on ultraviolet pulse detection is proposed.The relationship between corona discharge and ultraviolet ray,as well as the spreading characteristic of ultraviolet ray inside transformers,are analyzed.The detection principle of ultraviolet pulse detection is expounded.A monitoring method to positioning corona discharge inside transformers is put forward.The method of ultraviolet pulse detection is designed and validated by experiments.The results demonstrate that this method can be applied to online monitoring for corona discharge of transformers.
出处
《电力系统自动化》
EI
CSCD
北大核心
2010年第2期84-88,共5页
Automation of Electric Power Systems
基金
国家重点基础研究发展计划(973计划)资助项目(2009CB724506)
重庆大学输配电装备及系统安全与新技术国家重点实验室自主研究课题(2007DA10512708304)~~
关键词
紫外线
电晕
放电
电力变压器绝缘
ultraviolet
corona
discharge
power transformer insulate
