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文章摘要
一种基于SV采样信号的局部放电监测内同步基准修正方法
A synchronous reference correction method based on SV Sampling in partial discharge monitoring
Received:February 19, 2016  Revised:April 12, 2016
DOI:
中文关键词: 局部放电监测  SV采样  工频相位  内同步  高压设备
英文关键词: PD monitoring  SV sampling  frequency phase  internal synchronization  high-voltage equipment
基金项目:国家电网公司科技项目(智能变电站母线及智能组件可靠性研究)
Author NameAffiliationE-mail
luguanghui XJ Electric Co., Ltd luguanghui318@163.com 
yongmingchao* XJ Electric Co., Ltd ymc0112@163.com 
wangxingang Shandong Electric Power Equipment Co., Ltd wangxingang@sdee.sgcc.com.cn 
chenlei XJ Electric Co., Ltd ielchen@126.com 
zhouzhong XJ Electric Co., Ltd 15290990567@163.com 
liangwumin XJ Electric Co., Ltd lwm116@126.com 
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中文摘要:
      高压设备局部放电信号与设备运行的工频电压具有高度的相关性,局部放电监测装置或仪器必须基于稳定可靠的工频相位信号才能正常工作。针对现有电子互感器应用场合局部放电基准相位无法引入的难题,本文提出一种基于SV采样信号的局部放电监测内同步基准修正方法:首先利用装置自身定时器生成一个虚拟工频周期的“内同步”信号,利用该信号对各个传感器输入信号进行相位预标定;接收合并单元送来的电压互感器的SV信号并以其作为基准对虚拟的工频相位进行修正,从而得到精确和可靠的工频相位基准。所述方案实现简单,对于常规互感器和电子互感器均适用,具有灵活性和普及性。
英文摘要:
      According to the problem that PD reference phase cannot be introduced into the applications using electronic transformer, this paper presents a discharge monitoring internal synchronization reference correction method based on the SV sampling: firstly, use the device’s internal timer to generate a virtual frequency cycle, which is the internal synchronization signal, then pre-calibrate the signals using the internal synchronization signal; secondly, amend the virtual frequency phase using the SV signals provided by the combined units, after this we can get accurate and reliable frequency phase reference. Whether conventional or electronic transformers, this scheme is very simple to implement and has the flexibility and popularity in engineering applications.
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