提高汽轮机ETS保护回路可靠性的技术措施

Technical Measures to Improve the Reliability of Steam Turbine ETS Protection Circuit

为了提高火电厂汽轮机危急遮断系统(ETS)及保护回路的可靠性,排除ETS保护回路中存在的典型设计缺陷及隐患,进一步优化汽轮机主保护联锁功能,减少ETS保护联锁控制回路误动和拒动风险,避免火力发电厂经济损失及不安全事件的发生,针对汽轮机危急遮断系统保护回路设计及安装中常见的典型问题进行了列举和风险分析,对国内火力发电厂汽轮机危急遮断系统及回路常见设计的潜在风险及产生的原因进行了研究,提出了针对性的优化解决措施,在应用中切实提高了汽轮机危急遮断系统及保护回路的可靠性,对工控领域其他应用保护联锁功能的场所也具有同样的推广和借鉴作用。

In order to improve the reliability of turbine emergency trip system(ETS)and protection circuit in thermal power plant,eliminate the typical design defects and hidden troubles in ETS protection circuit,further optimize the interlock function of turbine main protection,reduce the risk of Maloperation and rejection of the fossil-fuel power station chain control circuit,and avoid economic losses and unsafe incidents,the typical problems in the design and installation of protection circuit for emergency trip system of Steam Turbine are enumerated and the risks are analyzed.This paper studies the potential risks and causes of common design of emergency trip system and circuit of fossil-fuel Power Station Steam Turbine in China,and puts forward the corresponding optimized solutions.The reliability of emergency trip system and protection circuit is improved in the application,which can be used as a reference for other places in industrial control field.