1) partial discharge currents
局部放电电流
2) direct current partial discharge
直流局部放电
1.
The direct current partial discharge(DCPD) measurement is one of major insulation tests for the electrical instruments whose work processes are charged by direct current source and discharge with large impulse.
针对直流电压从零加压到稳定的这一过程,提出直流局部放电的测试分为过渡区和平稳区两个阶段并根据被测试样电容器的参数,确定了相应的过渡区与平稳区的测试时间与方式,采用触发采集方式以适应直流条件下长时间采集的要求。
3) DCPD
直流局部放电
1.
DCPD Acquisition and Analysis System for HV Storage Capacitors;
高压储能电容器直流局部放电采集分析系统的研制
2.
At present,there are no uniform methods to analyze partial discharge under DC(direct current),Commonly,the basic parameters of DCPD(partial discharge under direct current) are discharge magnitude Q,number of discharge n and time t where discharge occurs and some curves such as Q-n,Q-t,n-t.
目前国内对于直流局部放电的分析无统一方法,大多仅限基于Q,n,t的Q-n,Q-t,n-t曲线等基本参数,但这些参数所蕴含的放电信息量较少,不能完全真实地反映介质内部局放的发展趋势及对绝缘介质的危害程度。
3.
To solve such problem, a high sensitivity DCPD measurement system was established.
为了检测介质绝缘性能,保证高压储能电容器的正常工作,根据其工作条件,采用直流局部放电测试技术对电容器进行测试与分析。
4) 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
5) 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
6) 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。
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。 |
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参考词条