李和 李阳

摘要：汽轮机是电力生产行业核心机械，发生故障会对电站带来巨大经济损失。随着社会经济的发展，推动我国电力行业的快速发展。汽轮机安装过程复杂，安装中受到多种因素影响，有效处理汽轮机故障十分重要，传统阀门检测无法检测到控制回路非线性波动，分析阀门曲线失配导致非线性波动原因，提出基于过程数据的非线性检测方法，从仿真与工业实例方面验证有效性，针对核电厂机组汽轮机厂房调试运行发生电动阀门故障，总结分析发生故障问题原因，为类似机组阀门故障检测提供参考。

关键词：汽轮机 电动阀门 电气故障 原因

Abstract： Steam turbine is the core machinery of electric power production industry， failure will bring huge economic losses to the power station. With the development of social economy， it promotes the rapid development of China's power industry. The installation process of steam turbine is complex and affected by many factors. It is very important to effectively deal with steam turbine faults. Traditional valve detection cannot detect the nonlinear fluctuation of control circuit. The causes of nonlinear fluctuation caused by valve curve mismatch are analyzed， and a nonlinear detection method based on process data is proposed to verify its effectiveness from the aspects of simulation and industrial examples， In view of the electric valve failure in the commissioning and operation of the steam turbine plant of the nuclear power plant， the causes of the failure are summarized and analyzed， so as to provide reference for the valve failure detection of similar units.

Key Words： Steam turbine; Electric valve; Electrical failure; Cause

核能是新興清洁能源，为工业发展等起到重要作用。现代化核电厂中需要很多阀门，阀门工作可靠对核电安全运行非常重要。阀门故障得不到及时诊断控制会引发巨大核电事故。研究核用汽轮机厂房电动阀门故障尤为重要。阀门频繁开闭对机械产生造成影响，通过腐蚀设备导致增加物耗。对阀门设备操作维修技术人员提出较高要求，要在阀门发生故障后及时诊断控制。核电阀门传输介质为饱和蒸汽、放射性水蒸气等流体，由于阀门不能正常工作导致核电厂停堆占比19%，发生故障导致停堆占10%。阀门故障原因分为生产性与运行性，导致阀门故障因素有很多，阀门故障具有复杂性。某核电厂机组采用智能电动阀门，SND主要分布于二回路系统，BERNARD14主要分布于SEN系统。本文分析电动阀门电头结构，总结常见故障原因及处理方法。……