基于物理参数的仪控系统阈值判决是核电站仪控系统的重要功能。常规阈值判决固定单一,缺乏与时间、工况的相关性。通过分析已有阈值判决,提出了在安全前提下采用阈值判决优化,在数据处理、阈值浮动、与工况相关联等方面作出改进,提升了仪控系统的容错、故障诊断能力,降低了停堆次数。 Instrument control system based on physical parameters Threshold decision is an important function of nuclear power plant instrumentation and control system. Conventional threshold decision is fixed single, the lack of time, conditions related. By analyzing the existing threshold judgments, this paper proposes that the threshold decision optimization is adopted under the premise of safety, and improvements are made in the areas of data processing, threshold floating, and working conditions, which improves the fault-tolerant and fault diagnosis capability of the instrumentation and control system and reduces the risk of stop Heap number.