基于噪声分析的核电厂压力传感管线堵塞监测  

Blockage Monitoring for Nuclear Power Plant Pressure Sensing Lines Based on the Noise Analysis Method

作　　者：李政希 青先国[1] 邓志光 徐涛 LI Zhengxi;QING Xianguo;DENG Zhiguang;XU Tao(National Key Laboratory of Nuclear Reactor Technology,Nuclear Power Institute of China,Chengdu 610213,China)

机构地区：[1]中国核动力研究设计院核反应堆技术全国重点实验室,成都610213

出　　处：《自动化与仪表》2024年第10期96-100,共5页Automation & Instrumentation

摘　　要：为对核电厂压力传感管线堵塞情况进行有效监测,及时排查潜在故障,提出在核电厂运行过程中使用自回归模型分析传感器噪声信号,进行功率谱估计及响应时间计算,以获取能够反应堵塞情况的典型特征指标。在Matlab中建立典型压力测量系统的集总参数模型,仿真正常及堵塞情况下的信号响应,对噪声分析方法进行验证。同时利用仿真分析传感管线堵塞对噪声频谱特征及响应时间的影响,并将结果与实际案例进行对比。通过实验分析,初步验证了噪声分析方法的可靠性,得到了堵塞情况下频谱谐振峰及响应时间的变化特征,相关特征与实际案例基本相符,为核电厂压力传感器管线的堵塞监测建立了基础。In order to effectively monitor the blockage of pressure sensing lines in nuclear power plants and to detect potential faults in time,it is proposed to use autoregressive modeling to analyze the sensor noise signals during the operation of nuclear power plants,and to carry out the power spectrum estimation and the response time calculation,so as to obtain the typical characteristic indexes that can respond to the blockage.The lumped parameter model of a typical pressure measurement system is established in Matlab,and the signal response under normal and blockage conditions is simulated to verify the noise analysis method.At the same time,simulation is used to analyze the impact of sensing line blockage on spectrum characteristics and response time,and the results are compared with an actual case.Through the experimental analysis,the reliability of the noise analysis method is preliminarily verified,and the characteristics of the spectral resonance peaks and response time changes in the blockage situation are obtained,and the relevant characteristics are basically consistent with those reported in the actual case,which establishes the basis for the blockage monitoring of the pressure sensor pipeline in the nuclear power plant.

关 键 词：噪声分析法 传感管线堵塞 状态监测 自回归模型 谱估计 

分 类 号：TH81[机械工程—仪器科学与技术]