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介绍了自动保护系统液压执行机构的组成和AST电磁阀的连接及其工作原理。通过具体实例,详细论述了某电厂300MW机组汽轮机危急遮断系统保护项目及保护原因。给出了电气危急遮断逻辑总系统图。系统自2000年3月投入运行至今,运行情况良好,达到了保护机组安全的目的。
The composition of the hydraulic actuator of automatic protection system and the connection of AST solenoid valve and its working principle are introduced. Through a concrete example, it discusses in detail the protection project and protection reasons of the emergency shut-off system of steam turbine of a 300 MW unit in a power plant. Given the electrical emergency cut off the logic of the total system diagram. Since the system was put into operation in March 2000, the system has been operating in good condition and has achieved the goal of protecting the safety of generating units.