Development and Application of Full Range Closed-Loop Testing System for DCS Transformation of Daya Bay Nuclear Power Plant
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维普
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在役核电厂数字化仪控系统(DCS)大型改造项目通常具有兼容性要求复杂、改造施工约束多、改造周期短、质量要求高等特点,大亚湾核电站是国内首个进行仪控系统数字化改造的在役核电厂,在国内无先例可供借鉴参考,面临巨大挑战.因此,提出了一种基于半实物仿真技术的DCS全范围闭环测试方法,将核电厂工艺系统仿真模型引入DCS测试环境,在测试环境中实现DCS对工艺系统的闭环控制,进而实现核电厂现场调试、运行及维护测试在DCS供应商工厂内的提前验证.目前已应用至大亚湾核电站 30 a 仪控系统改造项目,大亚湾核电站 2号机组DCS经过全范围闭环验证,已实现在大修周期内完成改造,仪控改造周期共 98 d,并一次投运成功.实践结果表明该技术可应用于DCS改造测试,实现降低现场实施风险、减少现场调试程序数量、节约现场实施工期的目标.
Large-scale transformation projects of distributed control system(DCS)of in-service nuclear power plants are usually characterized by complex compatibility requirements,multiple transformation construction constraints,short construction period,and high quality requirements.Daya Bay Nuclear Power Plant is the first in-service nuclear power plant in China to carry out digital transformation of DCS,and it faces great challenges as there is no precedent in the country to draw reference from.Therefore,a full-range closed-loop testing method of DCS based on hardware-in-the-loop simulation technology is proposed.The simulation model of nuclear power plant process system is introduced into the testing environment of DCS system,and the closed-loop control of DCS on the process system is realized in the testing environment,so that the on-site commissioning,operation and maintenance test of nuclear power plant can be verified in advance in DCS supplier's factory.At present,it has been applied to the 30-year instrument and control system transformation project of Daya Bay Nuclear Power Plant.After full-range closed-loop verification,the DCS of Unit 2 of Daya Bay Nuclear Power Plant has been transformed within the overhaul period,with a total instrument and control transformation period of 98 days and successfully put into operation at the first test run.Practical results show that this technology can be applied to DCS transformation testing,realizing the goals of reducing the risk of on-site implementation,reducing the number of on-site debugging programes,and saving the duration of on-site implementation.
Hardware-in-the-loop simulationDistributed Control System(DCS)Digital transformationClosed-loop testing
维普
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