Research on Optimal Operation and Safety Control of Thermal Power Unit Auxiliary Machines Under Deep Peaking Conditions

With the large-scale grid connection of new energy sources, thermal power units are changing from a pillar energy source to a regulating energy source. This paper investigates the optimal operation technology of thermal power unit auxiliary machine under deep peaking conditions. Firstly it summarizes the advantages and considerations of switching from dual auxiliary machines to single auxiliary machine operation. Then it designs protection optimization strategies, automatic optimization strategies, and low load stabilization and combustion control strategies to realize optimal operation and safety control of units. Finally it ensures the relevant protection interlocks and automatic regulation function properly when the single auxiliary unit trips. This technology can improve the economy and reliability of units and provide reference for similar projects.