火力发电机组自启停控制系统技术导则 DLT 1926-2018e.pdf

DL/T1926-2018Technical guide for automatic plant startup shutdown systemin fossil fuel power plant1 ScopeThis guide specifies the technical requirements for design,testing,and acceptance of the automatic startup andshutdown system of coal-fired units.This guide is applicable to coal-fired units with a unit capacity of 300 MW and above2 Normative ReferencesThe following referenced documents are indispensable for the application of this guide.For dated references,only the edition cited applies.For undated references,the latest edition of the referenced document(includingany amendments)applies.GB 50660 Code for design of fossil fired power plantDLIT 655 Code for acceptance test offirnace safeguard supeviory system in fossil fuel power plantDL/T 656 Code for acceptance test ofturbine control sysit:in fossil fuel power plantDLIT 657 Code for acceptance test of modulating coni!system in fossil fuel power plantDL/T 658 Code for acceptance test of on-off connoi sstem in fossil fuel power plantDL/T 701 Terminology for thermodynamic auoaiion for fossil fuel power plantsDL/T 5175 Technical rule for designing thermodynamic control system of fossil fuel power plant3 Terms and DefinitionsFor the purposes of this document,the terms,definitions,and abbreviations given in DL/T 701 and thefollowing apply.3.1 automatic plant startup and shutdown system(APS)an integrated management and control system intended to realize automatic control in the complete startupprocess and the complete shutdown process of units,which controls the start,stop and running status of theunits equipment according to the preset program,and finally realizes automatic start or automatic shutdown ofthe unit by systematically and orderly regulating the sequence control system(SCS),modulation control system(MCS),boiler fumace safeguard supervisory system(FSSS),steam turbine digital electro-hydraulic controlsystem(DEH),boiler feedwater control system,steam turbine bypass control system and other control systems3.2 sequence control system(SCS)a control system that controls a production process or important auxiliary equipment according to the certainprogram3.3 unit level controla group of control functions that carry out automatic startup and shutdown of units by sending startup andshutdown commands according to the operating status of unit equipment and predetermined control strategies1