Generator Excitation system
Excitation system:- Turbo Generators can be supplied with any of the following conventional excitation systems as per customer requirements. Conventional excitation system. Static excitation system. Brushless excitation system. Protection system. a) Conventional excitation system:- The system consists of D.C exciter…
Generator Lubrication system
Lubrication system:- The bearing lubrication is done by circulating oil under pressure and the complete system forms part of the main tube of the system of the turbine. Slip rings:- Slip rings are provided for turbo generators with conventional DC…
Generator Rotor wedges,Retaining rings & Ventilation and cooling
Rotor wedges:- Rotor winding is held in position by single/double dovetail shaped wedges made of non-magnetic material for two pole generators. This enables the winding to withstand high centrifugal force in operation and act as a damper circuit for current…
Generator Bearing & Rotor
Bearing:- The Turbo generators are provided with pressure lubricated self-aligning elliptical type bearing to ensure higher mechanical stability and reduced vibration in operations the bearing are either and shield mounted or pedestal type suitable temperature measurement device are mounted in…
Generator Stator Bar’s and Winding
Stator Bar’s and Winding:- Stator bar design incorporates the use of thermosetting epoxy mica insulation conforming to class “F” The bars/coils during manufacture are provided with conductive coating wrapping tape for minimisation of corona discharge semiconductive varnish/tape is applied a…
Turbo Generators-Their sizes
Turbo Generators-Their sizes: In the table, I, II, III the various standard sizes of the Air/Hyderabad cooled Turbo generator (3000r.p.m) (Air cooled manufactured at BHEL Hyderabad are indicated at additional BHEL can undertake to manufacture tailor-made Turbo generator to suit…
ELECTRICAL MACHINES
ELECTRICAL MACHINES Introduction : BHEL has 13 manufacturing plants and a host of service divisions a vital link to this chain of BHEL manufacturing units is the unit at Ramachandrapuram Hyderabad, manufactures turbo generator of rating up to 120mw for…
Stresses in compressor wheel
Stresses in compressor wheel: The forces exerted on the Gas turbine Rotor parts and resulting on that of compressor wheel are 1) Air Force Airforce caused by the pressure difference between and down steam of the blades they can be…
Specification & Rotor Wheel
Specification & Rotor Wheel: The compressor wheel is a part of a compressor rotor in gas turbine rotor each compressor wheel is machine separately and assembled with tie rods the compressor rotor is an axial flow type with 17 stages….
MAJOR PARTS OF GAS TURBINE
MAJOR PARTS OF GAS TURBINE : Gas Turbine Parts : The main parts for the gas turbine are Base frame Casings Diesel Engine Turbine rotor Bearing housing Bearings Works in drawer Nozzles Stator Blades Coolers Combustion system Molybdenum – …
APPLICATION OF A GAS TURBINE
APPLICATION OF A GAS TURBINE POWER GENERATION : Highly capacity gas turbines are widely used in power generation and standby. The grid system: Power is produced and distributed continuously to large distances through a grid system. Standby generation: Power is…
FEATURE OF GAS TURBINE
UNIQUE FEATURE OF GAS TURBINE : Keeping a view of disadvantages gas in both hydro and thermal power stations – gas turbine as well designed and introduced for power generation. To make use of natural gas as a fuel….
GAS TURBINE:
ABOUT GAS TURBINE: The Power generating turbo – machine decrease the head or energy laver of the working fluid (Like steam gas, hydro and wind) passing through them these machines are called turbines. They are coupled as primers to generators…
STEAM TURBINE AUXILIARY OIL
AUXILIARY OIL : Power oil at approximately 500kpa is supplied from pump through over speed relay B up to speed drop setting value F. to mains stop valve oil cylinder C and up to control valve K the oil down…
STEAM TURBINE GOVERNING
STEAM TURBINE GOVERNING : Nozzle Governing : With nozzle governing a series of nozzle valves open is the sequence as the load increases this type of governing is most efficient and is used for impulse turbine. Throttle Governing :…
