核电站保护系统信号交叉比较算法研究

发布时间：2018-07-15 15:42

【摘要】：核电站保护系统根据实际运行参数的变化,通过控制反应堆紧急停堆和专设安全设施,防止反应堆超过规定的安全极限或减轻事故所造成的后果。按照核安全法规要求,核电站保护系统必须进行周期试验,以验证其功能和性能是否满足可靠性的设计要求。但目前用于核电站保护系统T1试验的信号交叉比较算法存在不足,该算法无法判定保护系统冗余通道是否存在“4通道同向漂移”。在对T1试验详细研究的基础上,本文以T1试验的信号交叉比较算法为研究对象,详细论述了该算法数学建模与求解过程,并在原有数学模型上提出改进方法。改进的算法实现了 “4通道同向漂移”的判定功能,具有一定工程价值。主要工作成果如下:(1)阅读核电站保护系统T1试验的大量相关资料,基于原有信号交叉比较算法的数学模型,提出该算法的不足之处。同时提出“设定基准通道”和“4通道同向漂移”判定公式来实现改进,并利用C#3.0语言实现改进算法的程序设计。(2)依托中广核设计院验证平台,设计出T1试验的实现过程。通过PCTRAN软件实现实时数据采集。同时依据核安全重要仪表精度准则,设计出数学模型中的标准偏差值。(3)完成T1试验,并对数据结果做出分析。试验结果表明:改进的算法不仅满足原有功能,同时可对“4通道同向漂移”进行判定,具有可行性。
[Abstract]:According to the change of actual operation parameters, the nuclear power plant protection system can prevent the reactor from exceeding the prescribed safety limit or reduce the consequences of the accident by controlling the reactor emergency shutdown and special safety facilities. According to the requirements of nuclear safety regulations, nuclear power plant protection system must be tested periodically to verify that its function and performance meet the design requirements of reliability. However, the current signal cross-comparison algorithm used in the T1 test of nuclear power plant protection system is insufficient, and the algorithm can not determine whether the redundant channel of the protection system exists "4-channel codirectional drift". Based on the detailed study of T1 test, this paper takes the signal cross-comparison algorithm of T1 test as the research object, discusses in detail the mathematical modeling and solving process of the algorithm, and puts forward an improved method on the original mathematical model. The improved algorithm realizes the judgment function of "4 channel codirectional drift", and has certain engineering value. The main results are as follows: (1) based on the mathematical model of the original signal cross-comparison algorithm, the shortcomings of this algorithm are proposed by reading a large number of relevant data from the T1 test of the nuclear power plant protection system. At the same time, the determination formulas of "setting datum channel" and "4-channel codirectional drift" are put forward to realize the improvement, and the program design of the improved algorithm is realized by using C#3.0 language. (2) based on the verification platform of Zhongguang Nuclear Design Institute, the implementation process of T1 test is designed. Real-time data acquisition is realized by PCTRAN software. At the same time, according to the precision criterion of nuclear safety important instrument, the standard deviation value in mathematical model is designed. (3) the T1 test is completed, and the data result is analyzed. The experimental results show that the improved algorithm not only meets the original function, but also can be used to judge the "four channels in the same direction", which is feasible.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM623

【参考文献】