The three electricity integrated control of converter steelmaking plant mainly includes three aspects: converter PLC control, electrical control and interlocking, and automatic control. Converter PLC control is composed of PLC and HMI, which mainly completes electrical automation control and instrument automation control. It can realize the process monitoring, control, adjustment and monitoring of each subsystem of the equipment; the electrical control and interlocking adopts advanced, reliable and applicable technology to carry out sequence control, monitoring operation, man-machine dialogue and data communication for the converter feeding system, feeding system, converter tilting, oxygen lance lifting and traversing, movable hood lifting, argon blowing station, mixer, continuous caster, etc; Automation control mainly includes: automatic control of feeding system, automatic control of oxygen blowing pipe system, interlock and alarm, automatic control of iron mixing furnace, automatic control of slag splashing furnace, argon blowing operation of argon blowing station, and ferroalloy weighing operation of converter