Abstract:
The invention concerns a system for controlling the flow of turbined water from a plurality of hydroelectric plants (1, 2, 3, 4, 5) arranged in series along a watercourse with open channel flow, defining upstream of each plant a plurality of head races subject respectively to hydraulic flow and level constraints, said plurality of hydroelectric plants, in which the flow of water turbined by each of said plants is controlled by means of a flow setpoint (QCui), said system comprising regulation of a global electrical production power setpoint (Pc) for said plurality of hydroelectric plants by means of a flow regulation setpoint (QRGP) taken into account by the flow setpoint (QCi) of each of said plants, and in that said flow regulation setpoint (QRGP) determined by said regulation is weighted for each of said plants by means of weighting coefficients (αi) as a function of the respective hydraulic characteristics of the head races defined upstream of said plants.
Abstract:
The present invention relates to a power generation apparatus and, more specifically, to a freely-controlled power generation apparatus configured so as to generate electric power while being freely controlled under optimal conditions, since a cylinder body for supporting screws submerged under water is elevated by buoyancy or rotated according to the flow of the water.
Abstract:
Disclosed herein is a novel method for operating a hydropower reservoir which is an improvement over the existing single-parameter (the current month) USACE Rule Curve approach, the improvement comprising the consideration of a second parameter, namely the water level of the reservoir at the beginning of the month, in the decision-making process for operation of the reservoir.
Abstract:
Method of regulating a water level of a dam installation having a plurality of turbine generator units arranged to generate electrical power, wherein at least some of the plurality of turbine generator units are arranged at least one of one above another and one beside another so as to form at least one turbine generator module. The method includes regulating, at least to some extent, the water level to a predefinable set point by starting or stopping at least one of the plurality of turbine generator units and adjusting, in discrete steps, a quantity of water which can flow through the dam installation, wherein a discrete step is defined by a quantity of water which can flow through a defined number of turbine generator units. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.
Abstract:
A control apparatus responsive to the difference between liquid levels, and a method of controlling a liquid flow regulator by use of the apparatus is disclosed. The control apparatus may comprise a transducer responsive to the back-pressure maintained in a bubbler system including a pair of interconnected gas bubblers, one positioned upstream and one downstream of a flow restriction, such as a trash screen protecting the inlet to a hydroelectric turbine. The mouth of the downstream bubbler is positioned at a pre-selected elevation below that of the mouth of the upstream bubbler so that the pressure head of water at the mouth of the upstream bubbler sets the system back-pressure. When the downstream water level drops sufficiently below that of the upstream water level, the reduced water pressure head at the mouth of the downstream bubbler sets the system back-pressure. A flow regulator, such as a turbine wicket gate, is operated in response to the control apparatus.
Abstract:
In a control system for a hydroelectric power station system including upper and lower water reservoirs connected through a water channel, an intermediate water reservoir having a smaller storage capacity than those of the upper and lower reservoirs and provided on the water channel in cascade with the upper and lower reservoirs, and two power stations disposed between the upper and intermediate reservoirs and between the intermediate and lower reservoirs, respectively, the control system is arranged such that the water level of the intermediate reservoir is detected continuously and the detected value of the water level is used to correct the load instructions which are applied to the power stations for controlling outputs of the power stations whereby the water level of the intermediate reservoir is maintained substantially constant, while the power generation of the power stations is controlled so as to satisfactorily meet with the load instruction applied to the power system.
Abstract:
Hydroelectric power generation systems and methods of using such systems are provided. A power generation system includes a reservoir that is at least partially defined by a plurality of precast segments. At least a subset of the precast segments are interconnected via complementary coupling elements. The reservoir is elevated with respect to a fluid supply. The system further includes a flow path providing fluid communication between the reservoir and the fluid supply, a power generation module configured to pump fluid from the fluid supply and into the reservoir via the flow path, and a power conversion module configured to convert kinetic energy of fluid released from the reservoir and travelling through the flow path into electric energy.
Abstract:
A system for generating power from a flow of liquid having at most fifty feet of head and a flow rate of at most 300 cubic feet per second, includes: an axial-flow turbine, a penstock, an intake, a generator, and a control circuit. Each blade of the turbine runner is releasably coupled to the hub and each blade: 1) is configured to extract energy from liquid flowing through the runner by rotating the hub when the flow of liquid contacts the blade, and 2) has a pitch that is adjustable. The length of the penstock is adjustable. The generator is operable to generate electric power from rotation of the turbine. The control circuit to determines changes in the flow of liquid and in response modifies at least one of the following: 1) the speed of the axial-flow turbine's hub, and 2) the flow of liquid that the runner receives.
Abstract:
A system for the generation of energy from the flow of water in a body of water is provided, the system comprising a support assembly extending across at least a portion of the body of water; a generator assembly mounted in the support assembly, the generator assembly comprising a first rotor assembly and a second rotor assembly, each rotor assembly comprising a vertical hub rotatable about a vertical axis and a plurality of vertical blades extending radially from the hub, the first and second rotor assemblies being arranged such that the volume swept by the blades of the first rotor assembly overlaps the volume swept by the blades of the second rotor assembly. The system may be used to generate energy, for example electricity. In addition, the system may be used to control the level of water on the upstream side of the installation, for example in the cases of flooding.