A reservoir (102) near an ice cap (104), and a graded terrace network (116) on the surface of the ice cap (104). The graded terrace network (116) collects runoff water across a wide area, both within the limits of the reservoir's (102) ice cap natural catchment area (112), and beyond it in the ice cap non-catchment area (114). The graded terrace network (116) directs the collected water into the ice cap natural catchment area (112) and from there it drains into the reservoir's ice-free catchment area (106), and then into the reservoir (102). This increases the volume of water stored in the reservoir (102). This additional stored water is used to power a hydroelectric power station (300) and for other uses. A second reservoir (406), connected to the reservoir (102) by a water pump (402) and a second hydroelectric power station (410), adds additional water storage and power generating capacity.

A reservoir (102) near an ice cap (104), and a graded terrace network (116) on the surface of the ice cap (104). The graded terrace network (116) collects runoff water across a wide area, both within the limits of the reservoir's (102) ice cap natural catchment area (112), and beyond it in the ice cap non-catchment area (114). The graded terrace network (116) directs the collected water into the ice cap natural catchment area (112) and from there it drains into the reservoir's ice-free catchment area (106), and then into the reservoir (102). This increases the volume of water stored in the reservoir (102). This additional stored water is used to power a hydroelectric power station (300) and for other uses. A second reservoir (406), connected to the reservoir (102) by a water pump (402) and a second hydroelectric power station (410), adds additional water storage and power generating capacity.

A water reservoir system for generating, accumulating, storing, and releasing electrical energy comprises a reservoir wall built in a shallow body of water such as a sea or an ocean with a height exceeding the outside water level by about 10-25 m, thereby defining an interior of the water reservoir. Excess electrical energy from other renewable sources of electricity such as wind, solar power, or supplied by a local power grid is used to operate water pumps to fill the interior of the water reservoir with water during times of peak supply of electricity. Water is drained from the water reservoir to the outside body of water and generates electrical energy by flowing over a plurality of water turbines, thereby generating electricity and supplementing electrical power for the local power grid during times of high demand. Additional interior sources of renewable energy may be used to supplement external sources of electrical power in operating the system of the invention.

A water reservoir system for generating, accumulating, storing, and releasing electrical energy comprises a reservoir wall built in a shallow body of water such as a sea or an ocean with a height exceeding the outside water level by about 10-25 m, thereby defining an interior of the water reservoir. Excess electrical energy from other renewable sources of electricity such as wind, solar power, or supplied by a local power grid is used to operate water pumps to fill the interior of the water reservoir with water during times of peak supply of electricity. Water is drained from the water reservoir to the outside body of water and generates electrical energy by flowing over a plurality of water turbines, thereby generating electricity and supplementing electrical power for the local power grid during times of high demand. Additional interior sources of renewable energy may be used to supplement external sources of electrical power in operating the system of the invention.

The present invention relates to a construction method for a tidal power generation system capable of multiple-flow power generation from an installation of a uniflow generator, and more particularly, to a construction method for a tidal power generation system, in which auxiliary waterways are installed at both sides of a hydraulic turbine waterway in which the uniflow generator is installed, respectively, such that water is introduced into one side auxiliary waterway so as to generate power, and the other side auxiliary waterway is connected to an existing drain waterway so that the water used to generate power may be drained, thereby enabling the multiple-flow power generation only by opening and closing a required sluice gate.

The present invention relates to a construction method for a tidal power generation system capable of multiple-flow power generation from an installation of a uniflow generator, and more particularly, to a construction method for a tidal power generation system, in which auxiliary waterways are installed at both sides of a hydraulic turbine waterway in which the uniflow generator is installed, respectively, such that water is introduced into one side auxiliary waterway so as to generate power, and the other side auxiliary waterway is connected to an existing drain waterway so that the water used to generate power may be drained, thereby enabling the multiple-flow power generation only by opening and closing a required sluice gate.

A hydroelectric power generating apparatus includes a check dam mounted on a hilltop portion of a hillside to accumulate water of a river reach, a power generating device mounted on a hill bottom portion of the hillside to be driven by a kinetic energy carried by the water for power generation, a diversion pipe extending from the check dam to the power generating device and having at least one diversion duct which extends along the river reach to make a pipeline that converts gravitational potential energy of the water into the kinetic energy, and a surge tank disposed to stand uprightly from the diversion duct for balancing pressure in the diversion duct.

A system for generating hydrokinetic power from a subcritical channel is disclosed. The system comprises a power channel diverted from the subcritical channel for generating hydrokinetic power by changing one more flow parameters of water, wherein the power channel includes an intake section, one or more slope section, one or more power section and a recovery section, an intake spillway at the intake section of power channel, connecting the subcritical channel with the power channel for enhancing the velocity of water, wherein the intake spillway is designed based on rate of discharge of water to be drawn from the subcritical channel and an array of turbines located in the power channel for generating power using the diverted water from the subcritical channel, wherein the number of turbines are based on the length of the power channel.

The invention relates to a method for controlling a water sluice gate drive for a water sluice gate, in particular for a roller sluice gate, preferably in a hydroelectric power plant, wherein the drive has an electric machine, in particular has an asynchronous machine, in particular an asynchronous motor/generator. According to the invention, it is provided that the electric machine, in particular an asynchronous machine, has a fan brake, wherein the method comprises the steps of: disengagement of the fan brake in the case that an insufficient power supply is indicated, self-actuated operation of the electric machine, in particular an asynchronous machine, wherein the electric machine, in particular an asynchronous machine, is operated in generative island operation, in which a rotating field is generated in a self-actuating manner.

A spillway water system comprising at least one adjustable barrier sluice gate of one watercourse and defining: one upstream stretch and one downstream stretch of the watercourse arranged upstream and downstream of the sluice gate respectively; one spillway point arranged at a spillway height and at which a spillway water flow rate skims which flows from the upstream stretch and flows into the downstream stretch; the sluice gate comprising adjustment device/unit adapted to raise or lower the spillway height; a first measurement device/unit for measuring the level of water flowing along the downstream stretch; a second measurement device/unit for measuring the level of water of the upstream stretch; and a command device/unit of the adjustment device/unit operatively connected to the first and to the second measurement device/unit and configured to raise or lower the spillway height depending on the level measured by the first and the second measurement device/unit.