Hydropower Knowledge

1. Causes of cavitation in turbines The reasons for the cavitation of the turbine are complex. The pressure distribution in the turbine runner is uneven. For example, if the runner is installed too high relative to the downstream water level, when the high-speed water flows through the low-press...Read more »

Pumped storage is the most widely used and mature technology in large-scale energy storage, and the installed capacity of power stations can reach gigawatts. At present, the most mature and largest installed energy storage in the world is pumped hydro. Pumped storage technology is mature and sta...Read more »

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 o...Read more »

Prevent phase-to-phase short circuit caused by loose ends of stator windings The stator winding should be fastened in the slot, and the slot potential test should meet the requirements. Regularly check whether the stator winding ends are sinking, loose or worn. Prevent stator winding insulatio...Read more »

There is no direct relationship between the AC frequency and the engine speed of the hydropower station, but there is an indirect relationship. No matter what type of power generation equipment it is, it needs to transmit power to the grid after generating electricity, that is, the generator need...Read more »

1. What is the basic function of the governor? The basic functions of the governor are: (1) It can automatically adjust the speed of water turbine generator set to keep it running within the allowable deviation of rated speed, so as to meet the requirements of power grid for frequency quality ...Read more »

The rotational speed of hydraulic turbines is relatively low, especially for vertical hydraulic turbines. In order to generate 50Hz alternating current, the hydraulic turbine generator adopts a structure of multiple pairs of magnetic poles. For a hydraulic turbine generator with 120 revolutions p...Read more »

Hydraulic turbine model test bench plays an important role in the development of hydropower technology. It is an important equipment to improve the quality of hydropower products and optimize the performance of units. The production of any runner must first develop a model runner and test the mod...Read more »

1 Introduction Turbine governor is one of the two major regulating equipments for hydroelectric units. It not only plays the role of speed regulation, but also undertakes various working conditions conversion and frequency, power, phase angle and other control of hydroelectric generating units a...Read more »

1、 Division of capacity and grade of hydro generator At present, there is no unified standard for the classification of capacity and speed of hydro generator in the world. According to the situation in China, its capacity and speed can be roughly divided according to the following table: Class...Read more »

There is no direct relationship between the AC frequency and the engine speed of the hydropower station, but there is an indirect relationship. No matter what type of power generation equipment it is, after generating electricity, it needs to transmit electricity to the power grid, that is, the g...Read more »

During the maintenance of water turbine generator unit, one maintenance item of water turbine is maintenance seal. The seal for maintenance of hydraulic turbine refers to a bearing seal required during shutdown or maintenance of hydraulic turbine working seal and hydraulic guide bearing, which pr...Read more »