Digital excitation regulator ANIKRON BG-08 has been designed to automatically supply rectified current to the field winding of a brushless synchronous  generator. 
Main characteristics:
  • Swiching to working mode with precision synchronization method; 
  • Swiching to working mode with self-synchronization method (if necessary); 
  • Voltage frequency adjustment and high-power circuit breaker initiation; 
  • Excitation voltage boosting of given factor (at least 2) in case of the grid disturbances causing voltage reduction in a power-station bus system;
  • Reactive power deloading; 
  • Active power deloading;
  • Precise generator voltage control not less than ±0,2 % of a given DC performance;
  • Stable operation in transient and emergency modes (load surges and rejections, short circuits); 
  • Bumpless switching between the main and reserve control units if the main unit fails without changing a generator mode; 
  • Remote AEC setting;
  • Generator voltage deviation and derivative / generator voltage frequency deviation and derivative/ generator excitation current derivative algorithms for generator excitation current regulation;
  • Time-dependent excitation current overload protection;
  • De-excitation in case of the grid disturbances causing voltage increase in a power-station bus system;
  • Underexcitation mode;
  • Limiting of consumed reactive power;
  • Field suppression in emergency modes;
  • Electrical braking of a hydraulic power pack (upon customer request);
  • Sensor LCD to display oscillograms and service information;
  • Synchronization with an external time source;
  • Event log with extended recording capacity.

Protection algorithms:

  1. Rotor overload protection;
  2. Short-circuit protection of rectified voltage circuits; 
  3. Overcurrent protection;
  4. Stator voltage -rise protection in idling mode;
  5. Phase asymmetry protection;
  6. Protection from power-pack (thyristor bridge/PA) failures and internal faults;
  7. Rotor/exciter overheat protection;
  8. Protection from failed initial excitation;
  9. Protection from the failure of both regulation channels;
  10. Control and monitoring of main excitation system units.
Parameter Unit Value
Rated excitation voltage, max. V 100
Rated excitation current, max А 12
Max. steady-state voltage V 300
Max. steady-state current А 25
Voltage boosting ratio r.u. 2
Current boosting ratio r.u. 2
Excitation boost time s max. 50
Excitation deboost time ms max. 150
Excitation system response time while boosting ms 60
Excitation current stabilization accuracy % ±1
Working frequency range   Hz 45-65
Response time to disturbance ms 20
Generator bus system current control accuracy relative to a given static value 
% 0,2
Network protocols and communication interfaces    Modbus, Ethernet, Profibus,
4-20mA current loop
Excitation control system power supply   220V/380V/Battery