Pumped storage power plant

摘要

A pumped storage power plant performs a pumping operation by using a pump turbine, upper and lower regulating reservoirs. An upper space of one of the reservoirs is sealable. The pumped storage power plant detects an air pressure in the upper space, first and second water levels of the one and the other reservoirs. A controller of the pumped storage power plant obtains information of the detected air pressure, first and second water levels, and an electrical energy input from an external grid and used during the pumping operation. A calculation water level of the one reservoir is calculated by using the first water level and the air pressure. The controller adjusts the air pressure such that a difference between the second water level and the calculation water level becomes a desired difference that is determined by a characteristic of the pump turbine depending on the input electrical energy.

主权项

1. A pumped storage power plant that performs a pumping operation by using a pump turbine, an upper regulating reservoir, and a lower regulating reservoir located at a position geographically lower than the upper regulating reservoir, wherein an upper space of one of the upper regulating reservoir and the lower regulating reservoir is sealable,
the pumped storage power plant comprising: an air pressure adjustment unit configured to adjust an air pressure in the upper space of the one regulating reservoir; a first water level detector configured to detect a first water level of the one regulating reservoir; an air pressure detector configured to detect the air pressure in the upper space of the one regulating reservoir; a second water level detector configured to detect a second water level of other of the upper regulating reservoir and the lower regulating reservoir; and a controller configured to: obtain information of the first water level from the first water level detector, information of the air pressure from the air pressure detector, information of the second water level from the second water level detector, and information of a pumping input that is an electrical energy input from an external grid and used during the pumping operation; set a water level calculated by using the first water level and the air pressure, as a regulating reservoir calculation water level of the one regulating reservoir; and control the air pressure adjustment unit to adjust the air pressure such that a water level difference between the second water level and the regulating reservoir calculation water level becomes a desired water level difference that is determined by a characteristic of the pump turbine depending on the pumping input.