Transcription of CHAPTER-6 governing system - IIT Roorkee
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CHAPTER-6 governing system - IIT Roorkee
147 CHAPTER-6 HYDRO-TURBINE governing system (Reviewed by Dr. R. Thapar) Introduction governing system or governor is the main controller of the hydraulic turbine. The governor varies the water flow through the turbine to control its speed or power output. Generating units speed and system frequency may be adjusted by the governor. governing system as per IEEE std. -75 includes following. a) Speed sensing elements b) Governor control actuators c) Hydraulic pressure supply system d) Turbine control servomotors-these are normally supplied as part of turbine TO (SPEED SIGNALGENERATOR)TURBINEFLOWCONTROLW ICKETGATES ORNEEDLEHYDRAULICAMPLIFIERSERVOMOTORPILO TSERVOMOTOROR HYDRAULICTRANSDUCERCONTROLSPEEDSENSINGSP EED(FREQUENCY)SIGNAL FROM PT(SHP ONLY)GOVERNORLEVEL.
governor hydraulic system pressure switches 71qp governor hydraulic system pressure tank level switches 71qs governor hydraulic system sump tank level switches 63ar governor hydraulic system air relief valve operation 33wgl wicket gate automatic lock applied/released 65wglf wicket gate automatic lock failure 63ab generator air brakes applied 63abs
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