Core purpose
The excitation control system of the UNITOL 5000/UNITOL 6000 synchronous generator is the operational core of the excitation regulator
Realize multiple adjustment modes for AVR automatic voltage regulation, constant excitation current, constant reactive power, and constant power factor
Collect generator PT voltage and CT current, and execute excitation control algorithm
Built in generator protection logic, fault diagnosis, and waveform recording function
External communication: Interaction with human-machine panel, DCS backend, and upper monitoring system
Key Hardware Overview
PPC architecture embedded processor for real-time power control
Multi channel analog sampling channel (voltage/current)
Fiber optic/electrical interface connected to pulse amplification board, outputting thyristor trigger command
Onboard EEPROM stores excitation parameters and protection settings
Equipped with hardware watchdog and hardware self-test to meet the long-term 24-hour continuous operation of the power plant
Application Scenarios
Excitation cabinets for steam turbine generators, hydro generators, and gas generator sets; Thermal power plants, hydropower stations, self owned steel plants, and self owned chemical plants.

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