Hydro Power Plant Application

Hydro Power Plant application

Pump Hydro Power Plants are mainly used for pumped storage power stations. When the power system load is lower than the basic load, it can be used as a water pump, using excess generating capacity to pump water from the downstream reservoir to the upstream reservoir to store energy in the form of potential energy; when the system load is higher than the base load

At this load, it can be used as a Hydro Power Plant to generate electricity to regulate peak load. Therefore, the pure pumped storage power station can not increase the power of the power system, but it can improve the economic operation of the thermal power generating unit and increase the overall efficiency of the power system. Since the 1950s, pumped storage units have received widespread attention and rapid development in countries around the world.

The pumped storage units developed in the early days or with high heads mostly adopt three-machine type, which is composed of a generator motor, a water Hydro Power Plant and a water pump connected in series. Its advantages are that the Hydro Power Plant and the pump are designed separately, which can have higher efficiency, and the unit rotates in the same direction during power generation and pumping, and can be quickly converted from power generation to pumping, or from pumping to power generation. At the same time, the Hydro Power Plant can be used to start the unit. Its shortcomings are high cost and large investment in power station.

The blades of the runner of the diagonal flow pump can rotate, and it still has good operating performance when the head and load change, but due to the limitations of hydraulic characteristics and material strength, by the early 1980s, its highest head was only 136.2 meters ( Japan's Takane First Power Station). For higher heads, Francis pump Hydro Power Plants are required.

The pumped-storage power station is equipped with upper and lower reservoirs. Under the condition of storing the same energy, increasing the head can reduce the storage capacity, increase the speed of the unit, and reduce the project cost. As a result, high-head storage power plants over 300 meters are developing rapidly. The Francis pump Hydro Power Plant with the highest head in the world is installed in the Bainabashta power station in Yugoslavia. Its stand-alone power is 315 MW, the Hydro Power Plant head is 600.3 meters; the pump head is 623.1 meters and the speed is 428.6 rpm Put into operation every year.