Optimization and Renovation of Vacuum System for Ultra Supercritical Units
The vacuum control system of a certain ultra supercritical 2×1050MW unit has undergone three technical optimizations since its commissioning in 2015.This paper starts with analyzing the deficiencies in the original design,com-bined with the equipment defects and potential risks discovered during use on the production site,and in accordance with the"Twenty-five Key Anti-ac-cident Measures for Electric Power",proposes an optimization and gover-nance plan for the vacuum control system from multiple dimensions such as equipment selection rationality,thermal control loop reliability,monitoring in-strument and meter transformation,changing control logic algorithms,and en-riching measurement point redundancy.It actively carries out accident pre-diction,analyzes the possible technical blind spots under current operating conditions,analyzes the feasibility of further optimizing the vacuum control system,and points out the direction to effectively improve the reliability of the vacuum control system.Considering that the three technical renovation of the ultra supercritical unit have been implemented and put into use,and the results of the renovation are significant,it is hoped that this paper can pro-vide on-site maintenance experience for the upgrade and optimization of vac-uum control systems in similar power plants.
ultra-supercritical unitvacuum system modificationcon-trol loopoptimization and innovationreliability
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