核安全级DCS响应时间测试技术研究及实现  

Research and Realization of Nuclear Safety Grade DCS Response Time Test Technique

作　　者：陈钊 文景 贺先建 许金涛 高楠 张兰兰 CHEN Zhao;WEN Jing;HE Xianjian;XU Jintao;GAO Nan;ZHANG Lanlan(Science and Technology on Reactor System Design Technology Laboratory,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系统设计技术重点实验室,四川成都610213

出　　处：《自动化仪表》2025年第2期24-29,39,共7页Process Automation Instrumentation

摘　　要：当前,核电厂安全级数字化控制系统(DCS)的响应时间测试主要基于信号模拟装置并结合高精度记录仪进行人工手动测试,存在效率低、易出现人因差错等缺点。首先,基于分布式测试系统的特征,分析系统响应时间自动测试原理及计算模型,并根据分析结果,从机箱、板卡及通道三个层次提出实现高精度响应时间自动测试的时钟及信号同步设计方案。然后,通过对同步设计方案的同步误差、通道延迟及采样误差进行分析和计算得到系统误差,并给出满足要求的系统误差补偿系数。最后,搭建验证环境对响应时间测试的误差范围进行试验验证。验证结果表明,响应时间测试技术的误差能够控制在±0.5 ms以内。该技术的指标满足测试要求,能够在工程实践中应用。Currently,the response time test of safety-level digital control system(DCS)of nuclear power plant is mainly based on signal simulation device and combined with high-precision recorder for manual test,which has the shortcomings of low efficiency and prone to human errors,etc.Firstly,based on the characteristics of distributed test system,the principle and calculation model of system automatic response time test are analyzed,and according to the analysis results,the clock and signal synchronization design scheme is proposed to realize high-precision automatic response time test from the three levels of chassis,board and channel.Then,the system error is obtained by analyzing and calculating the synchronization error,channel delay and sampling error of the synchronization design scheme,and the system error compensation coefficient to meet the requirements is given.Finally,a verification environment is set up to test and verify the error range of the response time test.The verification results show that the error of the response time test technique can be controlled within±0.5 ms.The technical index meets the test requirements and can be applied in engineering practice.

关 键 词：分布式测试系统 安全级数字化控制系统 响应时间 信号 时钟 同步 

分 类 号：TH-39[机械工程]