安全仪表系统在二次再热机组的应用研究

  目的  安全性是电力行业永恒的主题，安全仪表系统是保证机组安全性的重要手段之一。国际上，安全仪表系统已有较为成熟的标准体系且得到广泛应用，而在国内火电行业的应用仍处于探索阶段。为推广安全仪表系统在电力行业应用，将描述其在火电二次再热机组的实际应用案例，为其它火电工程的设计、采购和运行维护提供参考。  方法  首先详细介绍和分析了相关国际规范，然后介绍了安全仪表系统在二次再热1 000 MW机组电厂项目的应用情况，并使用风险图表法对电厂进行安全完整性等级分析。  结果  通过分析等级并应用于二次再热1 000 MW机组电厂的设备招标、设计、调试、运行等，有效提高了电厂运行的安全稳定。  结论  在电力工程前期对机组安全仪表系统进行分析有利于电厂全生命周期的管理设计过程，应广泛应用于电力行业。

Application of Safety Instrument System in Secondary Reheat Unit

  Introduction   Safety is an eternal theme in the electric power industry. Safety instrument system is one of the most important means to ensure the unit safety. Internationally， safety instrument system has a relatively mature standard system and has been widely used. However， the application in domestic thermal power industry is in the exploration stage. In order to promote the application of safety instrument system in power industry， this paper will describe its practical application cases in thermal power secondary reheat units， and provide reference for the design， procurement and operation maintenance of other thermal power plant projects.  Method  Firstly， the relevant international standard were introduced and analyzed in detail. Then using risk chart method to analyze the safety integrity level of secondary reheat 1 000 MW power plant project.  Result  By analyzing safety integrity level and applying it to equipment bidding， design， commissioning and operation of secondary reheat 1 000 MW power plant， the safety and stability of power plant operation were effectively improved.  Conclusion  The analysis of the unit safety instrument system in the early stage of power plant project is beneficial to the management and design process of the whole life cycle of power plants， which should be widely used in the power industry.