91 results about "Small hydro" patented technology

The invention discloses a cluster equivalent modeling method for small and medium size hydroelectric generating sets, and belongs to the field of cluster modeling and equivalent analysis of the hydroelectric generating sets. The method includes the steps of firstly, conducting regional division on a power grid, and establishing hydroelectric generating set-load equivalent models including the parallel connection PID speed controller model, the water diversion system elastic water attack model, the six-parameter water turbine model based on a comprehensive characteristic curve and the three-order practical electric generator model; secondly, recognizing equivalent hydroelectric generator model parameters and load model parameters through the parallel particle swarm optimization which is put forward. The obtained equivalent models meet the refined modeling requirements of the hydroelectric energy system simulation, the electric power system analysis and the dispatching and operation calculation to a larger extent.

The invention relates to a load model of a regional power grid with a small hydroelectric generating set and a modeling method. Influences of low-voltage release of regional small hydro-electric power plants, distribution networks and induction motors are considered in the load model. By the practical modeling method, a component-based modeling approach and a measurement-based modeling approach are combined. The modeling method comprises the following steps of pre-sorting load nodes by using the component-based modeling approach; describing an equivalent motor by using typical parameters in a corresponding class; acquiring parameters of the equivalent motor by using a coherent equivalence method; reducing parameters to be identified in the load model; and identifying parameters of node measured data by using a genetic algorithm to obtain parameters of the model. Data are acquired by a fault recording device arranged in an electrical power system, node loads only require to be classified roughly, and the improved load model is close to actual conditions. The load model has the advantages that the investment is saved, the working amount is low, the precision of the model is high, and the load model can be directly used in BPA (business process analysis) software. Moreover, the load model can be used for frontline production practice.

A small or medium size hydraulic generation plant with a steel shell is placed on the sea floor of the stronger tidal/ocean current site. It is added an air hose to get the fresh air, and an entrance for the technician entering, at out side, the plant is connected with three tidal speed meters, a sea floor cable, an inland remote supervision and control center and a group of tailrace pipe of which the branch pipes of which the branch pipes are connected with a tidal/ocean turbine pump farm.

In operation, the plant bring in the sea floor water to generate electricity on large scale. The electricity is transmitted to land by the sea floor cable, while the tailrace firstly drops to the tailrace pond and continually flows thru the tailrace pipes to the turbine pump farm, at last, it is pumped out to the sea floor by the tidal/ocean turbine pump farm.

A method and apparatus for selective removal of heavy ions, biological, cations, anions or other elements of interest from liquids using magnetic nanoparticles, and recovery of nanoparticles to be reused in the wastewater purification. For certain embodiments, after water treatment and magnetic separation, the loaded nanoparticles may be washed, regenerated, collected and re-introduced in the water treatment cycle. Water treatment and particle regeneration take place singly or simultaneously. In another disclosed embodiment of the process, the electricity consumed by the pumping system is supplied by renewable energy sources such as solar, wind, geothermal, biogas or small hydro.

Systems and methods for using instream water flow velocity to increase hydro turbine output is provided. In one implementation, the system and method are adapted to harness the kinetic energy in flowing water, preferably in waste water spilling over low-head dams or flowing from pump discharge at reservoir pumping stations, and using such energy in conjunction with differentials between head water and turbine location to improve turbine output. In certain implementations, the novel technology can be used to establish dispersed small-scale hydroelectric generation units at existing low-head dams. Preferably, the dispersed small-scale hydroelectric generation units can be connected to the existing power grid, thus providing a new source of sustainable alternative energy.

A small-sized hydroelectric power generating apparatus includes a body case having a fluid passage, a water wheel provided at the above fluid passage and rotating with passing of the fluid having the predetermined flowing amount, a rotator coupled to this water wheel, and rotating with the water wheel, the rotator serving as a rotor portion arranged opposed to a stator portion, the rotor portion being relatively rotated in relation to the stator portion by passing the fluid to generate electric power, the stator portion having comb-shaped pole teeth which are arranged in the circumferential direction at regular intervals so as to be opposed to the peripheral surface of a rotor magnet of the above rotor portion, and a circumferential gap between the adjacent pole teeth is set to 1.5 times or less the size of a radial gap between each pole tooth and the rotor magnet.

The invention provides an optimal configuration of a 10 kV power distribution network parallel reactor and a compensation method of the 10 kV power distribution network parallel reactor. The optimal configuration of the 10 kV power distribution network parallel reactor and the compensation method of the 10 kV power distribution network parallel reactor are used for solving the problem that inductive reactive power optimal allocation of resources of insertion of small hydro to power distribution network and controlling switching of the reactive power compensation. The compensation method of the 10 kV power distribution network parallel reactor comprises the following steps: obtaining a voltage drop reactive decoupling formula by means of a decoupling deduction of the voltage drop formula; ensuring reactive decoupling coefficient according to the line reactance per kilometer and the line voltage reference; ensuring an optimal configured compensation point of the 10 kV parallel reactor according to the voltage drop reactive decoupling formula; ensuring and avoiding the capacity of the 10 kV parallel reactor configuration of the upper limit of the node voltage of a trunk line, and ensuring the capacity of a single unit and the number of configured groups of the 10 kV parallel reactor by a reference of a rule that a voltage regulating effect of reactive compensation equipment of a single group of a transformer substation does not exceed 2.5% of the rated voltage; and monitoring the node voltage of the trunk line including the small hydro in real time, and controlling the switching of the 10 kV parallel reactor according to the voltage drop reactive decoupling formula.

The invention belongs to the technical field of a wind power and waterpower generation and relates to a hybrid wind power and waterpower generation device. The hybrid wind power and waterpower generation device comprises an upper storage reservoir, a lower storage reservoir lower than the upper storage reservoir, water conveying pipes communicating the upper storage reservoir with the lower storage reservoir, and a waterpower generation device arranged on the water conveying pipe, wherein a wind power generation device is arranged on one side of the upper storage reservoir, and electricity generated by the wind power generation device is input into a variable-frequency motor through a power transmission line; the variable-frequency motor drives a water suction pump to pump water; a water inlet of the water suction pump is communicated with the bottom in the lower storage reservoir through a water conveying pipe; and a water outlet of the water suction pump is communicated with the water conveying pipes between the upper storage reservoir and the lower storage reservoir through the water conveying pipe. The hybrid wind power and waterpower generation device disclosed by the invention has the advantages that a disordered inferior power supply of wind power generation is changed into a high-quality power supply needed in a power utilization peak of a power grid; the variable-frequency motor is applicable to a wind power generator or a wind power generator set to generate a fluctuated power supply, so that wind energy in renewable energy resources can be sufficiently utilized; a power grid structure can be optimized, a peak clipping and valley filling capability of the power grid is improved, and the total operation cost is effectively reduced; and therefore, the hybrid wind power and waterpower generation device is suitable for middle-sized and small-sized hydraulic power stations.

The invention discloses a microgrid operation control method. The method comprises the following steps: a microgrid comprises small hydro, wind, light, storage and other forms of distributed power supplies, when a main grid system fails, a microgrid control system disconnects a grid-connected switch, isolates a fault point and switches to an island mode for operation; in the island mode, a hydroelectric generating set is used as a main frequency modulation and voltage regulation power supply in the microgrid to support the frequency and voltage of the microgrid, and each distributed power supply quickly participates in frequency primary regulation to cooperatively support the frequency and voltage stability of the microgrid; a microgrid energy management system recovers frequency and voltage to a normal range through load hierarchical control and energy storage accurate output adjustment. According to the invention, the multi-source coordination control problem of the microgrid systemcontaining the small hydro in the island mode is solved, the frequency modulation and voltage regulation capabilities of the traditional hydropower unit are fully excavated, and the frequency and voltage stability of the microgrid is ensured. The method is especially suitable for power supply scenes of remote areas with rich water and electricity resources, and the load power supply reliability level can be remarkably improved.

A rotator with an impeller and a stator generating an induced voltage are arranged in a casing. The tap water flowing flows through a main passage, which has a first jet orifice facing the impeller, and rotates the impeller. A bypass running from the inflow port and passing around an outer periphery of the stator is provided. When the water pressure is high, a check valve closing the bypass is opened against a spring force and the water flows out to a drain port, while the impeller is stably rotated by a pressure of water jetted from a second jet orifice penetrating from the bypass to face the impeller, which pressure is in reverse proportion to a speed of flow inside the bypass.

A small-sized hydraulic electrogenerating device comprises a base plate, a bracket device, a first idler wheel device, a support device, a frame body, a second idler wheel device and a buffer device, wherein a material receiving box is arranged on the base plate; the bracket device comprises a first support rod, a second support rod, a first sway rod, a second sway rod, a first vertical rod, a skew plate, a second vertical rod, a first cross bar and a first positioning block; the first idler wheel device comprises a first idler wheel and a first poke rod; the support device comprises a support plate, a first bracket and a third sway rod; a water collecting block, a filter screen, a first fixed block, a second fixed block, a second through hole and a water inlet pipe are arranged on the frame body; the second idler wheel device comprises a second idler wheel, a second poke rod, a curved pipe, a water inlet hopper, a first fixed rod, a second bracket and a second cross bar; the buffer device comprises a water outlet hopper, a third cross bar, a third vertical rod, a water outlet pipe, a second positioning block, a first spring, a top backup plate and a second spring. The small-sized hydraulic electrogenerating device can make full use of hydroenergy to reduce utilization of non-renewable energy resources.

Disclosed is a data transformation method between a GOOSE (Generic Object Oriented Substation Event) protocol and a Zigbee protocol in a small hydro-electric IED (Intelligent Electronic Device) net. The measurement IED device which is used for collecting all kinds of data in the small hydro-electric and gateway nodes form a Zigbee-protocol-based wireless sensor network, predistributes an ID number and sets up a mapping table in the gateway and under the condition of the method can carry out effective judging on an received Ethernet packet, obtain the ID number of the measurement IED according to a retrieving mapping table of an destination MAC (measurement and control) address, and finally pack the Ethernet packet into a Zigbee wireless data frame to be delivered; judge the effectiveness of the received Zigbee wireless data frame, obtain the MAC address of the measurement IED and the previous transmission time according to the retrieving mapping table; judge the time intervals, then drop redundant data packets, and finally packet the Zigbee wireless data frame into a GOOSE Ethernet packet. The data transformation method between the GOOSE protocol and the Zigbee protocol in a small hydro-electric IED net has the advantages of being effective, quick in protocol transmission, and capable of restraining redundant packets.

The invention relates to a drainage pipeline, and in particular to a building drainage system. A miniature hydroelectric generator is arranged in the pipeline to utilize kinetic energy produced by wastewater flow to drive the generator to rotate for electricity generation; and at the same time, a filtering net and a U-shape groove are arranged in the pipeline to conduct double filtration of the impurities in the wastewater, so as to avoid pipeline blockage and influence on normal working of the generator, and facilitate cleaning of precipitated impurities by property management personnel. The building drainage system provided by the invention uses wastewater flow for power generation, and saves a lot of resources while ensuring the smoothness of the pipeline, and is suitable for large popularization.

The invention discloses a household energy-saving device. The household energy-saving device comprises a water tank, a miniature hydro-generator, accumulators, a solar cell plate, a water inlet pipe, a water outlet pipe and wires. The household energy-saving device is characterized in that the water tank is suspended outdoor, one side of the water tank is provided with the water inlet pipe, the water outlet pipe is arranged at the bottom of the other side, the inside of the water tank is provided with the miniature hydro-generator, the top of the water tank is provided with the solar cell plate, and the miniature hydro-generator, the accumulators and the solar cell plate are electrically connected through the wires. Domestic sewage which is only used once is sent to the water tank through the water inlet pipe and then sent to a toilet through the water outlet pipe, thus realizing the reutilization of water. Electricity generated by the miniature hydro-generator and the solar cell plate is transferred to the accumulators through the wires, thus directly providing power supply for the household. The household energy-saving device can realize the aims of reducing cost, protecting environment and saving energy and be characterized by simple structure and convenient operation.

A stepwise operating parallel-type hydro power generation system having a fixed flow path includes a parallel pipe, a first power generation facility, a second power facility generation facility, first and second flow regulators, and a controller. The parallel pipe includes an inlet pipe, an outlet pipe, and a first straight pipe and a second straight pipe. The first and second straight pipes connected between the inlet pipe and the outlet pipe. Each of the first and second power generation facilities includes a water turbine rotating with the water introduced thereinto and a power generator operating according to the rotation of the water turbine. The controller is configured to open and close either or both of the first and second flow rate regulators at the same time.

The invention provides a flexible interlink steel gate and a support opening/closing device thereof, which belongs to the technical field of hydraulic engineering. The flexible interlink steel gate mainly comprises a flat plate steel gate (1), a gate support hinge (2), a cylindrical rubber bag communicated (7) with a water supply/drainage system, a flange (6) at the upper part of the rubber bag, a connecting piece (8) at the lower part of the rubber bag, a bottom water stop (3), a side water stop (18), a door interlink, and the like. The steel gate is made of a steel panel and a light structural steel beam grid system through welding, adjacent gates can be connected through the water stops and the interlink fasteners, and one gate is connected with a bottom plate pre-embedded part (5) through a hinge, and is controlled to be opened or closed through the expansion and the retraction of the rubber bag which is filled with water or discharges water. The invention has the advantages that less central piers are used, water is not blocked, the gate has a light and thin body and can be controlled to be opened or closed by a person, the water filled and discharge amount is small, the cost of construction is low, and the use is convenient, so that the flexible interlink steel gate and the support opening/closing device thereof can be widely applied in mountainous area watercourses and small hydro-electric power plants.

The invention discloses a high-efficiency shocking type water wheel generator, which belongs to the water power generating machine. The water power insufficient use for water energy of the prior water wheel generator and incapability of generating electric energy meeting the demands of power network in some low water season are overcame. The invention is arranged on a hub of a water wheel axle and provided with at least two layers of spokes from down to up. At least two sheets blades for accepting the shock by water current are arranged on every spoke of every layer. A fist class distributive pipe and a third class distributive pipe of a water guiding apparatus are of taper. A water booster is arranged on a second class distributive pipe. The invention is used to middle and small size water power generation, thereby improving water energy using rate by 20 percent and having good economy effectiveness.

A regional power grid supply load fine prediction method based on two-stage reduction comprises the following steps that 1, historical data of regional power consumption loads, small hydro-thermal power, new energy power generation and regional mutual supply power and historical and prediction data of time-sharing zoning meteorology are collected; Step 2, decomposing the grid supply load into a combination of a regional power consumption load, small hydro-thermal power, new energy power generation and regional mutual supply power by adopting a two-stage reduction method; Step 3, introducing time-sharing partition meteorological information according to characteristics and influence factors of different types of loads, constructing different prediction models, and obtaining a prediction result of each type of load curve based on each type of load prediction model and a refined meteorological prediction value of a prediction day; And step 4, combining the load prediction curves of various types, and restoring to obtain a network supply load prediction curve of the prediction day.

A compact hydropower generator adopting multiple rotary drums comprises a water reservoir for changing the flow direction of water that flows along a river and for temporarily storing the water. A base body is located at a lower side of the water reservoir and has a drainage way formed at an end of a downwardly inclined portion thereof. An upper closing member and a lower closing member are provided at opposite sides of an upper end of the base body. The upper closing member is configured to communicate with the water reservoir, and the lower closing member is configured to communicate with the drainage way through a plurality of drain pipes. A power generating unit is located between the upper and lower closing member. When the water stored in the water reservoir is introduced thereinto through a plurality of water supply pipes, the power generating device rotates about a plurality of shafts due to the potential energy of the water to obtain power. An accelerator and a generator are coupled to the lower ends of the shafts.

The invention discloses a sewage treatment device which comprises a breeding tank, a separation and treatment device and a filtered water storage device. The sewage treatment device is characterized in that a wastewater outlet in arranged at the bottom of the breeding tank, rails are mounted on two sides of the breeding tank, a movable sliding plate is mounted on the rails and connected with a movable sewage sucking plate through a hydraulic rod, and a sewage sucking hose is mounted between the movable sliding plate and the movable sewage sucking plate and connected with a stretch pipe placement box. The sewage treatment device has the advantages that water discharged from a breeding farm is utilized to generate power, so that power generation efficiency of small-sized hydraulic power plants can be improved, pollution of seawater, lakes and rivers around the breeding farm can be prevented, and the sewage treatment device is suitable for popularization and use.

The invention belongs to the technical field of heating, and particularly relates to an air energy auxiliary preheat heating method and a heating method for a water heating unit. The heating method is characterized in that circulating water in a heating system is used for generating power through a small hydroelectric generator, electricity power generated by the hydroelectric generator is used for preheating air, generated hot air and water in a water tank are mixed to preheat the water, preheated water enters a heating circulation pipe network for heating after the temperature of the preheated water further rises through electromagnetic heating or quartz tube heating, and the circulating water is cooled after heating and flows back to the water tank for preheating again and heating recycling. The air energy auxiliary preheat heating method has the beneficial effects of being safe and environment-friendly in usage, low in energy consumption and high in heat efficiency. According to the air energy auxiliary preheat heating method, electromagnetic heating or quartz tube heating is used for replacing fire coal heating, atmospheric pollutants cannot be generated, and the pollution to the environment is avoided; and hot air is used for preheating the water, and the energy consumption for heating the unit is greatly reduced. The air energy auxiliary preheat heating method can be applied to central heating or family splitting heating, and is a perfect substitute technology of a fire coal hot water heating system at present.