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Electrical control system of diesel generator set

2014-01-16 14:46      Click:

     Electrical control system of diesel generator set diesel generator set by the monitoring system, speed control system of diesel generator sets, generator automatic voltage regulation system composed of three systems, generators, diesel generator control system plays a monitor the working status of the generator set speed control system is stable with adjustable engine speed, fuel supply pump and so on.  Generator automatic voltage regulator system is responsible for regulating the generator voltage control work.  Constitute a complete set of three diesel generators electrical control system.  

    A 、diesel generator set monitoring system:
    Mainly by the generator controller , temperature sensors, oil pressure sensors, high water temperature alarm, engine oil pressure alarm and other components, the main engine of job status monitoring parameters.
    Under normal circumstances, diesel engine water temperature exceeds 93 ℃, temperature pre-alarm switch action, diesel engine high temperature pre-alarm, and you should stop to check, the water temperature exceeds 102 ℃, high temperature official alarm stop.
    Diesel engine oil pressure is below 21PSI, low oil pressure pre-alarm switch action, diesel engine low oil pressure pre-alarm, and you should stop to check, engine oil pressure is below 15PSI, low oil pressure alarm switch formal action, the unit automatically shut down.
    Water temperature sensor, oil pressure sensor, temperature alarm, oil pressure alarm signal is passed to the induction generator controller, the unit controller based sensor output signal corresponding control signal to control the engine alarm or shutdown.

    B、 The diesel generator set speed control system:
   Mainly by the generator speed sensors, electronic speed control board , pump electronic actuator components.
   Diesel generator operation, the speed must be stabilized at 1500rpm (50Hz) or 1800rpm (60Hz).
   Generator load increases, the engine speed will go down in an instant phenomenon, mounted on the flywheel speed sensor immediately sensed engine speed changes and this change in the electrical signal fed to the electronic control board, electronic transfer then increase speed board electronic actuator for pump supply current value, so that the oil pump increases, the engine speed rise, until it stabilized at the set speed value on us.
   Generator load is reduced, the engine speed will be increased in an instant phenomenon, mounted on the flywheel speed sensor immediately sensed engine speed changes and this change in the electrical signal fed to the electronic control board, electronic speed control board immediately reduce the pump electronic actuator supply current value, so that the oil pump is reduced, the engine speed fall, we set up stable at speed value.
    Engine speed instability, if the electrical component failure, it will be by the electronic speed control board, electronic speed sensors and actuators, or caused damage to these components or wiring is not strong, the speed sensor wires are not shielded wire or shielded Well, there are strong signals outside influence will lead to unit speed instability.
   If due to mechanical component failure caused by the diesel filter is too dirty, diesel pipe leak, pump mechanical failure or engine power loss caused by too large. 

    C、 the generator voltage regulator system:
    Each generator equipped with an automatic voltage regulator (AVR), STAMFORD generator automatic voltage regulator major commonly used models MX321, MX341, SX440.  Wherein the feedback sampling voltage MX321 three-phase input (P6, P7, P8), and feedback SX440 MX341 and two phase input voltage is sampled (P6, P6, P7) or (P7, P7, P8).
     For machines equipped with a permanent magnet generator PMG, MX341 can replace the MX321, the machine is not equipped with permanent magnet generator PMG must be used SX440.  AVR STAMFORD generators are equipped with a parallel functional units.
      Marathon generator according to the size of the power unit with a different voltage regulator, Prime Power 320KW below with SE350 regulator, the regulator is not set and the machine functions, such as the unit and the machine must be used to install a APM2000.  Prime Power 360KW or more with DVR2000 digital regulator, the regulator has set and machine functions.  Leroy Somer alternator according to the size of the power unit with a different voltage regulator, Prime Power 150KW below with R230 regulator, the regulator is not set and the machine functions, such as use of the unit and the machine needs to be replaced R448, Prime Power 160KW or more with R448 regulator, the regulator has set and machine functions.

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