基于支持向量回归的稳压器水位信号重构研究

摘要

稳压器水位是船用压水堆非常重要的监测参数,是操纵员判断堆运行瞬变的重要依据.然而,稳压器却时常出现假水位、超量程水位及水位测量丢失的问题.为此,根据稳压器水位参数与反应堆进出口平均温度、稳压器压力与温度、主回路系统的冷却剂装量、充排水流量等热工水力参数的耦合关系,提出一种基于支持向量回归的稳压器水位信号重构方法.模拟试验分析表明,该方法能快速、准确、有效地重构出正常运行工况下的稳压器水位信号.%Pressurizer water level is an important monitoring parameter to marine pressurized water reactor for operator to estimate operation transient of the reactor.However,pressurizer often takes on problems of false water level,over-range measurement of water level and the loss of measuring.A method based on support vector regression was used to reconstruct the pressurizer water level according to the coupling relationship between pressurizer water level and other thermal-hydraulic parameters,such as the average temperature between reactor core inlet and outlet,pressure and temperature of pressurizer,coolant inventory of main loop system,and charge and drainage flow.Simulation analysis shows that the method can quickly,accurately and efficiently reconstruct the pressurizer water level signal under normal operating conditions.