In addition to the working parameters, structure and types of hydraulic turbine introduced in previous articles, in this article, we will introduce the performance indexes and characteristics of hydraulic turbine. When selecting a hydraulic turbine, it is important to understand the performance of a hydraulic turbine. Next, we will introduce the corresponding performance index parameters and characteristics of the hydraulic turbine.
Performance index of hydraulic turbine
1. Rated power: it is used to express the capacity of hydro generator, in kW. The rated power divided by efficiency shall not be greater than the shaft output of hydro turbine;
2. Rated voltage: the rated voltage of hydro generator shall be determined by technical and economic comparison in conjunction with the manufacturer. At present, the voltage of hydro generator is from 6.3kV to 18.0kv. The larger the capacity, the higher the rated voltage;
3. Rated power factor: the ratio of the rated active power of the generator to the rated apparent power, in COS φ N indicates that hydropower stations far from the load center often adopt high power factor, and the cost of motor can be slightly reduced when the power factor increases.
Characteristics of hydraulic turbine
1. The energy storage power station mainly plays the role of peak load regulation and valley filling in the power grid. The unit starts and stops frequently. The structure of the generator motor must fully consider its repeated centrifugal force, which causes fatigue to the structural materials and thermal change and thermal expansion on the stator and rotor windings. The stator often adopts thermoelastic insulation;
2. The fan on the rotor of conventional hydro generator for reversible generator motor can not meet the requirements of heat dissipation and cooling, and the peripheral fan is generally used for units with large capacity and high speed;
3. The oil film of thrust bearing and guide bearing shall not be damaged during positive and negative rotation;
4. The structure is closely related to the starting mode. If the starting motor is used, a motor is installed on the coaxial. If it is necessary to change the speed of the generator motor, in addition to changing the power phase, it is also necessary to change the stator winding and the rotor pole.
These are the performance indexes and characteristics of water turbine. In addition to the main working parameters, classification, structure and installation structure of the hydraulic turbine introduced before, the preliminary introduction of the hydraulic turbine is over. Water turbine generator set is an important hydropower equipment and an indispensable part of hydropower industry. At the same time, it is also an important equipment to make full use of clean and renewable energy to achieve energy conservation and emission reduction and reduce environmental pollution. In the era of increasing attention to environmental protection, it is believed that hydro generator units will have greater market prospects.
Post time: Mar-04-2022
