1) partial discharge (PD)
局部放电(局放)
2) Partial discharge
局部放电
1.
Typical model design of partial discharge in transformer;
变压器局部放电典型模型设计
2.
Identification and countermeasures for interference source at site of partial discharge test;
现场局部放电试验中干扰源的识别和采取的对策
3.
Research on the on-line monitoring system for partial discharge of hydro-generators;
水轮发电机局部放电在线监测系统研究
3) PD
局部放电
1.
Preliminary Study on Signal Extraction Technology for PD Pulse Based on Independent Component Analysis;
局部放电脉冲信号ICA提取技术的初步研究
2.
Study of bubble development in transformer oils based on PD measurement in negative point-plane gaps;
基于负极性下局部放电测量的变压器油中气泡发展过程实验研究
3.
The PD Detection of GIS in Service Using UHF-Acoustic Method;
运行中GIS局部放电超高频-超声波的联合检测
4) partial discharge(PD)
局部放电
1.
This paper introduced the work principle of Ultrasonic to measure partial discharge(PD)in transformers,and the composition of positioning system.
阐述了超声波测量变压器局部放电的机理及定位系统的组成、局放超声波信号的频谱分析、定位算法的实现,最后指出超声定位的注意事项及局限性。
2.
The key techniques about the sensing,data acquisition and processing,pattern recognition and calibration of ultra-high-frequency (UHF) signals are illuminated and the present status of field applications of on-line UHF partial discharge(PD) detection method is summarized in this paper.
从传感器、超高频信号的采集处理、信号的模式识别及超高频信号的标定等几个关键技术出发,对超高频法在电力设备局部放电在线检测中的应用现状进行了综述,并对超高频法在实际应用中存在的问题进行了探讨。
3.
It is difficult to measure the partial discharge(PD) signals because the signals may be submerged or flooded when the surrounding noises are severe.
局部放电极易被噪声污染,众多干扰中载波通讯、高频保护、无线电广播等周期干扰尤其严重,而窄带干扰严重时可能完全淹没局部放电信号,这给局部放电的检测工作带来了巨大困难。
5) partial discharge (PD)
局部放电
1.
Obtaining the partial discharge (PD) characteristic is one of the key issues of PD ultra-high frequency (UHF) detection.
获取局部放电(PD)特征信息是局部放电特高频(UHF)检测的关键问题之一,研究UHF信号与PD脉冲电流之间的关系有助于绝缘缺陷的诊断。
2.
The selections of center frequency and bandwidth are very important to detection, calibration and pattern recognition of ultra-high-frequency (UHF) partial discharge (PD) signals in transformers.
变压器局部放电特高频检测中,检测频率和带宽的选取对于放电信号的提取,进而对放电的标定及局部放电模式识别特征的保留具有决定作用。
3.
A new-type external antenna of ultra high frequency (UHF) partial discharge (PD) detection system is designed according to the wave-guide structure of gas-insulated metal-enclosed switch gear (GIS) and the wide band frequency spectral features of PD excited by electromagnetic waves.
根据气体绝缘的金属封闭式组合电器(GIS)的波导结构及局部放电脉冲所激发的电磁波的宽频带特征,建立了外部天线超高频局部放电检测系统。
6) partial discharges
局部放电
1.
Location of partial discharges fault in transformer winding;
变压器绕组局部放电故障的定位
2.
A system based on Fabry-Perot(FP) acoustic sensor is designed for on-line detection of ultrasonic signals generated by partial discharges in transformer oil.
为在线测量变压器油中局部放电产生的超声波,建立了非本征型光纤法珀(FP)传感系统,传感器的传感单元FP腔由石英膜和尾纤端面组成,声波作用于石英膜上产生振动调制入射光波,通过解调含有局放信息的输出信号,可对变压器运行状态进行在线检测。
3.
The significance of on line monitoring partial discharges(PD) of electric apparatus insulation and diagnosing condition of electrical apparatus based on “finger print”(3 D φ q n pattern) are demonstrated .
阐述了在线监测电力设备绝缘局部放电以及放电指纹对诊断电力设备绝缘状态的重要意义。
补充资料：局部放电
| 局部放电 partial discharge 电力设备绝缘在足够强的电场作用下局部范围内发生的放电。这种放电以仅造成导体间的绝缘局部短（路桥）接而不形成导电通道为限。每一次局部放电对绝缘介质都会有一些影响，轻微的局部放电对电力设备绝缘的影响较小，绝缘强度的下降较慢；而强烈的局部放电，则会使绝缘强度很快下降。这是使高压电力设备绝缘损坏的一个重要因素。因此，设计高压电力设备绝缘时，要考虑在长期工作电压的作用下，不允许绝缘结构内发生较强烈的局部放电。对运行中的设备要加强监测，当局部放电超过一定程度时，应将设备退出运行，进行检修或更换。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条