CPR1000机组主给水流量调节系统优化  

Optimization of Main Feed Water Flow Regulation System of CPR1000 Unit

作　　者：蔡少展 CAI Shaozhan(Yangjiang Nuclear Power Co.,Ltd.,Yangjiang 529500,China)

机构地区：[1]阳江核电有限公司,广东阳江529500

出　　处：《自动化仪表》2021年第S01期257-261,共5页Process Automation Instrumentation

摘　　要：CPR1000机组主给水系统大小阀的控制方式采用大亚湾核电站模拟电路的思路,两个阀门共用一个水位调节比例积分微分(PID)控制器进行控制。这种控制方式严格规定了大小阀投切自动的顺序。投切顺序错误会导致小阀反向调节水位,风险极大。同时,共用水位调节PID控制器降低了小阀独立调节能力。基于数字化DCS控制系统,对CPR1000机组的主给水控制方式进行适应性优化,将大小阀调节PID控制器分离各自控制水位调节。优化后,运行人员在干预水位调节需要改变大小阀手自动状态时,无须考虑投切的顺序,减少了人因失误风险。小阀调节回路优化后,可根据现场运行情况设置PID参数,提高抗扰动能力。最后,通过CPR1000机组数字化的非安全级分散控制系统(NC-DCS)软件搭设优化后的大小阀组态逻辑,实现了主给水流量调节系统的优化。该优化在数字化控制系统都适用,能够实现核电机组更高的自动化。The main water supply system of CPR1000 unit is controlled through the idea of the analog circuit of Daya Bay Nuclear Power Plant.The two valves share a water level adjusting proportional integral differential(PID)controller.This control mode strictly stipulates the automatic sequence of the big and small valves.The wrong cutting sequence will cause the small valve to adjust the water level reversely,which is very risky.At the same time,the PID controller of common water level regulation reduces the independent regulation ability of small valve.Based on the digital DCS control system,the main water supply control mode of CPR1000 unit is adaptively optimized,and the PID controller of the large and small valves is separated to control the water level respectively.After optimization,when the operator needs to change the automatic state of the large and small valve hands to intervene in the water level regulation,it does not need to consider the sequence of switching and cutting,which reduces the risk of human error.After the small valve regulating circuit is optimized,PID parameters can be set according to the field operation to improve the anti-disturbance ability.Finally,the optimized configuration logic of the large and small valves is built by the NC-DCS software of CPR1000 unit,and the optimization of the flow regulation system of the main feed water is realized.This optimization is applicable to the digital control system,which can achieve higher automation of nuclear power units.

关 键 词：比例积分微积分 主给水大小阀 数字化 NC-DCS系统 调节回路 水位波动 组态逻辑优化 手自动切换 

分 类 号：TH707[机械工程—仪器科学与技术]