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ABB 3BHE021951R0124｜Excitation Control Unit｜
3BHE021951R0124
1) Excitation/frequency conversion closed-loop control
Automatic voltage regulation AVR: Stabilize the generator terminal voltage (± 0.5%)
Excitation Current Control FCR: Manual/Automatic Dual Mode, Directly Control Excitation Current
PID+adaptive algorithm: fast response to sudden load changes and suppression of oscillations
2) High power drive output
Drive excitation thyristor/IGBT bridge, output excitation current/armature current
Equipped with overcurrent, short circuit, and freewheeling protection, directly controlling the power circuit
3) Multiple protection (anti burn machine)
Overexcitation/Underexcitation Protection: prevents rotor overheating and out of step
Overvoltage/overcurrent/ground fault: rapid tripping to protect the generator/motor
V/Hz protection: prevent transformer/motor from overcurrent
4) Signal acquisition and interface
Analog input: 4-20mA/0-10V (voltage, current, power, temperature)
Digital I/O: switch interlocking, tripping, status feedback
Encoder/synchronization signal: speed, phase feedback, used for synchronous grid connection/precision control
5) Communication and Diagnosis
Fiber optic/Profibus/RS485: connected to DCS, upper computer, and excitation system main controller
Self diagnosis+LED status: power, operation, fault, communication indicator lights
Event record+fault code: easy to quickly locate the problem
ABB 3BHE021951R0124｜Excitation Control Unit｜
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