计及小信号水电机组监控设备电磁干扰检测方法  

Electromagnetic Interference Detection Method for the Monitoring Equipment of the Hydropower Station in the Consideration of Small Signal Stability

作　　者：杨劲松 唐孝舟 李亚都[3] 杨定祥 陈贵昌 王长清 YANG Jing-song;TANG Xiao-zhou;LI Ya-du;YANG Ding-xiang;CHEN Gui-chang;WANG Chang-qing(Huaneng Lancang River Hydropower INC.,Kunming 650214,Yunnan Province,China;Nanjing Nanrui Able Engineering Technology Co.,Ltd.,Nanjing 211002,Jiangsu Province,China;Xiʹan Thermal Power Research Institute Co.,Ltd.,Xiʹan 710054,Shaanxi Province,China)

机构地区：[1]华能澜沧江水电股份有限公司,云南昆明650214 [2]南京南瑞继保工程技术有限公司,江苏南京211002 [3]西安热工研究院有限公司,陕西西安710054

出　　处：《中国农村水利水电》2022年第12期188-192,共5页China Rural Water and Hydropower

摘　　要：电磁干扰是影响水电站监控系统可靠性的重要因素之一,会影响水电站的安全、稳定运行。针对以上问题,研究计及小信号水电机组监控设备电磁干扰检测方法,首先分析电磁干扰小信号稳定特征的识别方法,利用UHF法与高频电流法寻找小信号特征,为干扰信号的采集奠定基础;其次研究了采集电磁干扰信号的方案,以建立数据采集卡为基础,安排小信号与其关联;再次是对电磁干扰信号进行等级划分和检测平台的模拟,根据不同等级的电磁干扰信号来匹配相应的检测模拟平台,精准记录小信号稳定数据;最后采用对比实验的方式,验证基于小信号稳定的电磁干扰检测方法相比传统方法在检测精准度方面提升了3.5%左右,为水电机组监控设备电磁干扰信号的寻找提供了更加精准的方案。Electromagnetic interference is one of the important factors affecting the reliability of monitoring system of hydropower station,which will affect the safe and stable operation of hydropower station.In order to solve the above problems,this study analyzed the electromagnetic interference detection method of hydropower equipment in consideration of small signal stability.Firstly,the identification method of electromagnetic interference small signal stability characteristics is analyzed,and the UHF method and high frequency current method is used to find small signal characteristics for the collection of interference signals.Secondly,the scheme of collecting electromagnetic interference signals is studied based on the establishment of data acquisition cards and its correlation with small signals.Thirdly,the electromagnetic interference signals are classified,and the detection platform is simulated according to different levels of electromagnetic interference signals to match the corresponding detection simulation platform.Then,the small-signal stable data is accurately recorded.Finally,a comparative experiment is used to verify that the electromagnetic interference detection method based on small-signal stability has improved detection accuracy by about 3.5%compared with the traditional method,which is a hydroelectric power station.The results of this research serve as a more accurate solution to electromagnetic interference signals of equipment.

关 键 词：小信号 监控系统 电磁干扰 信号检测 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]