Generator
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Generator knowledge
Hydrogenerator refers to the generator that uses turbine as the prime motor to convert water energy into electric energy. When the water flows through the turbine, the water energy is converted into mechanical energy, and the shaft of the turbine drives the rotor of the generator, and then convert the mechanical energy into electrical energy and output. Hydrogenerator is the main power equipment for the production of electric energy in hydropower stations.
The speed of hydrogenerator will determine AC frequency, to ensure stability of this frequency, the speed of rotor must be stabilized.In order to stabilize speed, the speed of prime motor(turbine) can be controlled by closed-loop control method, that is, sent AC frequency signal is sampled and feed back into control system for control opening and closing angle of turbine guide vane, and control output power of turbine, and then speed of generator can stabilize by feedback control principle.
Product Details
Classification of generator
Hydrogenerator can divided into vertical and horizontal type according to axis position.The medium and large unit is generally used vertical layout, and horizontal layout is usually used for small-sized unit and Tubular unit.Vertical hydrogenerator can divided into suspension type and umbrella type according to supporting method of guide bearing.Umbrella type hydrogenerator can also divided into normal umbrella type, semi-umbrella type and full-umbrella type according to guide vane different position on upper bracket and lower bracket. The stability of suspension type hydrogenerator is better than umbrella type hydro generator, it has small thrust bearing, small loss and easy installation and maintenance, but it has more steel consumption.Total height of umbrella type unit is low, which can reduce height of hydropower station powerhouse.Horizontal hydrogenerator is normally used speed which is more than 375r/min, and used for some hydropower station with small capacity.
Installation structure form
Installation structure form of hydrogenerator is generally determined by type of turbine.It mainly has several types:
1)Horizontal structure
The horizontal structure of hydrogenerator is usually driven by Pelton turbine. Horizontal turbine units is usually used two or three bearings. The structure of the two bearings has short axial length, compact structure, and easy installation and adjustment. However, when the critical speed of its shafting cannot meet the requirements or the bearing load is larger, this situation should use the three-bearing structure. Most of the domestic horizontal hydraulic generating sets belong to medium and small units.
2)Vertical structure
The vertical structure is widely used in domestic hydraulic generating set. Vertical hydraulic generating set is usually driven by Francis or Kaplan turbines. The vertical structure can be divided into suspension type and umbrella type. The thrust bearing of the generator located on the upper part of the rotor is collectively called the suspension type, and the thrust bearing of generator located on the lower part of the rotor is generally called the umbrella type.
3)Tubular structure
The Tubular hydraulic generating set is driven by Tubular turbine. Tubular turbine is a special type of Kaplan turbine with fixed or adjustable runner blades. Its main feature is that the runner axis is arranged horizontally or obliquely, and it axis consistent with the water flow direction of the inlet and outlet pipes of the turbine. Tubular hydroenerator has the advantages of compact structure and light weight, and is widely used in power station with low head.
TC HYDRO Quality Evaluation:
The generator produced by TC HYDRO,its coil is wound by high quality red copper wire,insulation class F,and is used high quality silicon steel sheet, and stator frame is welded by high quality steel plate.Main shaft is manufactured by high quality carbon steel forging.




The generator is produced by TC HYDRO,its voltage grade is 0.4KV-11KV, insulation class is F,frequency is 50Hz and 60Hz, power factor is 0.8-0.9, the capacity of horizontal hydrogenerator: 100KW ~8MW, the capacity of vertical hydrogenerator is from 100KW to 100MW, and the capacity of Tubular generator is from 100KW to 20MW.







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