摘要
通过现场实测研究了电容器出厂局放检测中干扰信号的时域、频域及统计特征;针对出厂局放检测的特点和要求,开发一种基于差动平衡接线方式和特高频噪声传感器同步降噪技术及高速百兆实时采集技术的新型高频电流局部放电测量系统;采用对比法在现场试验了系统的干扰抑制能力;最后在现场与常规法和超声检测方法进行了对比测试。实测结果表明:研制的测试系统,现场测试条件下抗干扰能力强;在电容器出厂局放检测中能够更好地反映试品局部放电真实水平;相比于常规法和超声法,其能够检测出10pC以下的放电量,灵敏度更高。
The characteristics of time domain,frequency domain,statistics of interferences in PD detection of capacitors were studied.A measuring method of high frequency current for PD detection based on differential balance connection mode and synchronization noise reduction technology of UHF noise sensor and real time acquisition technology of high speed fast were applied according to the characteristics and requirements of factory PD detection of capacitors;the comparative test was carried out between ultrasonic detection method and pulse current method and high frequency current method in the field.The results show that the detection method proposed has a strong capability of anti-interference and can better reflect the real level of PD detection of capacitors.Compared with ultrasound test and pulse current method,it can detect 10pC of PD,so the detection sensitivity is higher.
作者
唐志国
蒋佟佟
于智强
王倩
TANG Zhi-guo;JIANG Tong-tong;YU Zhi-qiang;WANG Qian(State Key Laboratory of New Energy Power System,North China Electric Power University,Beijing 102206,China;Beijing Key Laboratory of High Voltage and EMC,North China Electric Power University,Beijing 102206,China;Anhui Huainan Pingwei Power Generation Co. Ltd.,Huainan 232089,China;Ningbo Harong Electric CO.,LTD,Ningbo 315000,China;Beijing Huadian Zhicheng Electrical Equipment CO.,LTD,Beijing 102206,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2019年第3期18-25,33,共9页
Electric Machines and Control
基金
国家自然科学基金(51377052)
关键词
电容器
高频电流法
局部放电
抗干扰
灵敏度
capacitor
high frequency current method
partial discharge
anti-interference
sensitivity
