45 results about "Hydro energy" patented technology

The invention provides a wind-light-water storage integrated scheduling method and system based on big data, and relates to the technical field of energy management, and the method comprises the steps: extracting a driving factor of wind-light-water storage data based on a generalized dynamic factor model, and carrying out the dynamic modeling of the driving factor, and obtaining an output state feature graph of a wind power plant and a photovoltaic power station; constructing an edge dependence structure based on a Copula function to obtain a wind-light-water combined space structure diagram; generating an energy storage response strategy sub-graph according to the wind-light-water combined space structure graph, the charge state of the energy storage system and the device degradation parameters; according to the energy storage response strategy subgraph and the load data and fluctuation data of the regional load center, singular spectrum analysis is carried out to extract periodic load characteristics, and a multi-energy output path field is obtained; and performing fuzzy approximate reasoning on the path field to obtain an optimal joint scheduling sequence. According to the method, the whole-process closed-loop optimization of the dispatching of the wind-light-water storage system is realized, and the method has the advantages of high prediction precision, high response speed and high dispatching flexibility.

The invention discloses a power system hybrid energy storage capacity optimal configuration method and device and a medium, and relates to the technical field of power system optimal configuration, and the method comprises the steps: obtaining a net load time sequence of a power system, carrying out the preprocessing of the net load time sequence, and obtaining a preprocessed net load time sequence; processing the preprocessed net load time sequence by adopting a complete set empirical mode decomposition method to obtain a spectral characteristic curve; determining a target separation frequency based on the spectral characteristic curve by using a trial and error method, and determining frequency bands loaded by the pumped storage power station and the electrochemical energy storage power station in the power system based on the target separation frequency; and establishing a hybrid energy storage capacity optimal configuration model, and solving the hybrid energy storage capacity optimal configuration model to obtain an optimal configuration scheme of the pumped storage power station and the electrochemical energy storage power station. According to the invention, the adjusting capability of the energy storage system combining pumped storage and electrochemical energy storage is improved.

The invention discloses a hybrid pumped storage-based wind-light-water storage integrated power station and a scheduling method, the system comprises a frame structure main body, the bottom of the frame structure main body is provided with a low-position lower water storage tank, and a groove at the top of the frame structure main body is internally provided with a high-position potential energy upper water storage tank; a water suction pump station and a water-turbine generator set are arranged between the low-position lower water storage tank and the high-position potential energy upper water storage tank; the water-turbine generator set comprises a plurality of U-shaped communicating vessel pipelines, the top ends of the U-shaped communicating vessel pipelines are communicated with the high-position potential energy upper water storage pond, the bottom ends of the U-shaped communicating vessel pipelines are communicated to the low-position lower water storage pond, and a plurality of water-turbine generators are fixed to the bottom ends of the U-shaped communicating vessel pipelines. The side surface of the hydraulic ram is connected with a water feeding pipeline, and the other end of the water feeding pipeline communicates with a high-position potential energy upper water storage pond. And the construction difficulty can be effectively reduced, the cost input is reduced, the occupied area is reduced, the constraint of the natural environment is eliminated, the dependence on auxiliary facilities is reduced, flexible layout can be realized according to different regional conditions, and stable operation in the power utilization peak period is realized.

The invention discloses a pumped storage power station site selection evaluation method and system based on a correction factor analytic hierarchy process. The method comprises a pumped storage power station site selection evaluation index system constructed according to influence factors of site selection of a pumped storage power station; establishing an expert scoring table for site selection of the pumped storage power station according to the characteristics of the pumped storage power station; correcting the expert scoring scale value of the evaluation index by adopting a correction factor; calculating the weight of each index in the index system by adopting an analytic hierarchy process; and establishing a comprehensive evaluation model by adopting a fuzzy comprehensive evaluation method, and evaluating the pre-selected site of the pumped storage power station. According to the method, the influence of expert subjectivity on the evaluation index weight is reduced, and the evaluation result is closer to the actual situation.

An accurate cooling system for hot-rolled coil matched warehouse steel coil stacking and chopping comprises a steel coil temperature measuring device, an industrial personal computer, a draught fan, an electric cabinet and a spraying system, an infrared thermal imager monitors total radiation infrared thermogram information and high-temperature alarm information of warehouse area steel coil stacking and chopping in real time, and the information is transmitted to the industrial personal computer through a router; the fans are distributed between two rows of steel coil stacks on the edge of the reservoir area and supply air to channels between the adjacent steel coil stacks; the electric control box controls the starting and stopping actions of corresponding equipment and adjusts the power of a motor of the spraying pump station, and the spraying system controls the work of a spraying head; a PLC module is arranged in the electric control box and used for storing a steel coil accurate cooling control algorithm, and parameters such as on-off instructions of the draught fan, the electromagnetic valve, the water supplementing pipe and the pneumatic valve are obtained through calculation. The device has the advantages that the structure is simple, the building difficulty is low, the hot rolled steel coil pile can be accurately and uniformly cooled, the hydroelectric energy loss is greatly reduced, the cooling time is greatly shortened, the production rhythm is improved, and smooth production is ensured.

A Thermoelectric Hydro Energy Harvester also known as the THEH is a stationary, selfcontained and self-sustaining electrical generation system. The THEH system comprises an electrical generation system using multiple fluid pumps and thermal electrical generators (TEG) to generate electricity by exploiting the temperature differences in bodies of water at various depths, insulated piping, basic fundamentals of fluid dynamics and specialty designed heat exchangers.

The invention provides an optimization method and device for a new energy system, and the method comprises the following steps: creating a scheduling model corresponding to the new energy system, the scheduling model being used for representing how to carry out power scheduling between a photovoltaic panel and pumped storage equipment; therefore, the new energy system outputs stable electric energy; modeling the scheduling model into a Markov decision process MDP, and designing a state space, an action space and a reward function of the MDP; and obtaining an optimization strategy of the Markov decision process MDP by using a DDPG algorithm. According to the optimization method, the new energy system can output stable electric energy.

A Thermoelectric Hydro Energy Harvester also known as the THEH is a stationary, self-contained and self-sustaining electrical generation system. The THEH system comprises an electrical generation system using multiple fluid pumps and thermal electrical generators (TEG) to generate electricity by exploiting the temperature differences in bodies of water at various depths, insulated piping, basic fundamentals of fluid dynamics and specialty designed heat exchangers.

The invention relates to the technical field of hydroelectric energy, and the method comprises the steps that a two-stage starting mode is adopted, an opening limit self-adaption function is configured, the starting opening degree of a speed regulator is set according to single machine operation, the speed regulator influences the load of another machine by adopting power mode closed-loop control, power is added to a global variable for memory, and the speed regulator is controlled to be in a closed-loop mode. The method is used for the stable load function condition of the speed regulator in the opening mode, automatic switching is achieved through the opening mode when a power part breaks down, and a unit operates stably. According to the method, the load fluctuation of the speed regulator under one-hole double-machine disturbance can be reduced, and the unit overload phenomenon caused by the abnormal working state of the unit is reduced. The automatic load adjusting capacity and reliability of the unit in operation are improved, and the situation that the unit is damaged due to non-planned shutdown caused by unit overload is prevented. And the phenomena of overload and slip load caused by hydraulic fluctuation and excessive active power disturbance of the unit in unit load regulation are prevented.

The present invention relates to a modular individual polygonal module grouping device of 5 to 9 sides (100) of wind or hydro energy comprising a wind or hydro block (10) with vertical axis and a cage (20) having the form of a right prism with polygonal base of 5 to 9 sides, in which said two bases (21a, 21b) are connected to each other at the level of their respective vertices (23a, 23b) by uprights (24) arranged so that each face (22) forms a panel open in its center for a passage of air through said face (22);and wherein said block (10) comprises a stage formed (11) by lower (12a) and upper (12b) plates that are superimposed in pairs, said plates (12a, 12b) being circular in shape, parallel to each other, and connected rigidly by blades (13), said block (10) being mounted for rotation inside said cage (20) such that the fluid exerts a stress on each of the blades (13) causing said block (10) to rotate about itself. Abbreviated figure: Figure 1;

A pumped hydro energy storage system and method are disclosed. The system employs a high-density fluid, such as a slurry, to improve power output. In some cases, the fluid is a binary fluid system, with a high-density fluid and a lower-density fluid, such as water. The lower-density fluid flows through the turbine unit of the system, avoiding the need to modify the system to handle the high-density fluid, while achieving improved power output. The system can be configured with one atmospheric reservoir for a higher-density fluid and another one for a lighter-density fluid. Each of them is connected to a pressurized cavity which is filled with the higher-density or lighter-density fluid. The atmospheric tanks may be at the same elevation, or the tank with high density fluid might be higher for increased energy output. For example, the system may be placed on a topographical elevation. The system further includes a fire extinguishing sub-system to utilize the water or lower-density fluid to extinguish fires occurring in the proximity thereof.

The application provides a green offshore pumped storage energy, phase modulation and power generation system, which comprises a wind turbine or a wind turbine group, an offshore water tower, a water turbine, an excitation or permanent magnet synchronous generator and a water pumping pump, the excitation or permanent magnet synchronous generator is located in the offshore water tower, the wind turbine or the wind turbine group is located at the top of the offshore water tower or is distributed around the offshore water tower, the vertical excitation or permanent magnet synchronous generator is coaxially connected with the water turbine, a lower water outlet with a volute is arranged in the offshore water tower, a water storage tank is arranged above the offshore water tower, a tower water chamber, a tower water outlet channel, a sea outlet, a water inlet and corresponding valves and related circuit structures are arranged below the offshore water tower. The system can realize a novel offshore energy utilization, integrates offshore pumped storage energy, offshore power generation and offshore phase modulation into a unified structure, takes into account the operation state of the land power grid, fully utilizes offshore resources and improves the utilization rate of wind power generation.

The present invention provides an automatic cleaning device for an oil-circulating air-cooled main transformer cooler, comprising a cooler, a plurality of fans provided on one side of the cooler, a cleaning rack provided on the other side of the cooler, a sliding propeller provided on the cleaning rack, a cleaning device provided at one end of the propeller, a plurality of buffer devices at the bottom of the cleaning rack, and a plurality of magnets at the top of the cleaning rack. This device is a fully automatic cleaning device, and the operation process is fully mechanized and does not require any manual intervention; it has a high degree of automation. This device can perform online cleaning of a running cooler without affecting the operation of other surrounding equipment and without safety risks. This device utilizes wind power, gravity and related mechanical designs in a comprehensive manner, and does not require water or electricity during use, thus saving energy. The wind energy generated by the fan can not only be used for heat dissipation, but also provides kinetic energy for the propeller. This device does not generate wastewater, is very energy-saving and environmentally friendly, and has great promotion value.

A modular pumped storage hydroelectric power generation system may include a shaft having a first end positioned opposite a second end. A reservoir is connected to a first end of the shaft. The second end of the shaft is configured to be located below the ground surface. The second end of the shaft has a first compartment and a second compartment. The first compartment accommodates a pump assembly having an inlet in hydraulic communication with the second compartment. The second compartment is configured to store water. The conduit has a first end connected to the pump assembly, the first end positioned opposite a second end of the cap extending through the first end of the shaft. The second end of the pipeline is in hydraulic communication with the reservoir. A conduit of the pump assembly transfers water from the second compartment of the second end of the shaft to the reservoir.

The present invention discloses an automatic control method and control system for an underground original domain filling barrel-type coal-gangue separator, which relates to the field of automatic control of mine ore separation equipment. Combining with the actual underground production, the present invention effectively ensures the efficient and stable operation of the barrel-type coal-gangue separator, remotely monitors and controls the whole process of equipment operation, saves labor costs, extends the service life of the equipment, avoids the waste of water and electricity energy, recycles and subsequently reasonably treats the waste water, and fills the sorted gangue in the original domain, realizing energy conservation and environmental protection, and meeting the requirements of green and low-carbon mining with original domain filling in coal mines.

The invention provides a micro-grid control and new energy recycling system, and relates to the technical field of micro-grid control. The micro-grid control and new energy recycling system comprises an energy source module, an energy storage management module, a fault detection module, a micro-grid control module, a data backup module and an intelligent power grid interconnection module, and the energy source module comprises a solar energy unit, a wind energy unit, a water energy unit and a biomass energy unit. The solar unit is formed by establishing a photovoltaic module. The main power grid and the micro-grid are interconnected and intercommunicated through the two-way communication unit, the micro-grid can participate in a wider power market, development of a smart power grid is promoted, effective utilization of electric energy is guaranteed through effective distribution and transmission of energy through the distribution unit, the overall efficiency of a power system is promoted, and the system is suitable for popularization and application. The main power grid and the micro power grid are intercommunicated to share information of load management and energy scheduling, so that the operation of the whole system is optimized, and the possibility of overload and energy waste is reduced.

The invention relates to the technical field of hydroelectric energy system transition process and control, in particular to a cooperative control method for a pumped storage-wind power combined operation system, and the method comprises the steps: obtaining a system multi-frequency dynamic characteristic analysis result which comprises the dynamic response of a low-frequency mass wave, an intermediate-frequency water hammer wave and a high-frequency electric wave and the coupling relation between a subsystem and a wavelet; in combination with a cooperative control theory, selecting the rotating speed and the guide vane opening of the pump turbine as key state variables, determining a macro-variable and deducing a control equation; the strategy is adopted to pertinently control the wavelets to preferentially control the intermediate-frequency water hammer waves, and system cooperative accurate control is achieved by regulating and controlling key state variables such as the water level of a surge chamber and the rotating speed of a unit. According to the method, multi-source coupling disturbance can be effectively inhibited, the stability and the adjusting performance of the system are improved, and the method is adaptive to various pumped storage-wind power combined operation scenes and is high in universality.

The invention relates to the technical field of hydroelectric energy prediction, and discloses a watershed hydroelectric generating capacity prediction method based on multi-source data fusion and deep learning, and the method comprises the steps: collecting data information of a hydropower station in a watershed, carrying out the data fusion and time-space alignment of the data information, and constructing a meteorological-hydrological-engineering coupling data set; constructing a grid scale dynamic effective rainfall coefficient model, and calculating to obtain an effective rainfall space-time sequence considering the space-time non-stationarity; according to the meteorological-hydrological-engineering coupling data set and the effective rainfall space-time sequence, carrying out multi-scale space-time characteristic engineering; establishing a multi-task physical constraint deep learning model of the shared feature extraction layer, and predicting the hydropower generation capacity; and carrying out tuning and online updating on hyper-parameters of the multi-task physical constraint deep learning model. By utilizing the scheme of the invention, the prediction precision and the model robustness are obviously improved, and reliable decision support is provided for hydropower dispatching of a complex drainage basin.

The present invention provides a method for parameterized planning and site selection of large, medium and small pumped storage, comprising the following steps: determining site selection conditions; in the digital topographic map, digitally planning the site of the station; determining the screening conditions for the lower reservoir site, screening multiple lower reservoir site selection points, and obtaining the lower reservoir site selection points that meet the screening conditions. The method for parameterized planning and site selection of large, medium and small pumped storage of the present invention can parameterize site selection conditions such as distance-to-height ratio, dead water level drop, head amplitude variation and power generation hours, and intelligently select the planning site based on the terrain data in combination with the Euler path algorithm, thereby improving efficiency and reducing qualitative and quantitative workload, and can screen and screen the available installed capacity according to the conditions of the allowable excavation adjustment amount, and autonomously reversely screen the available installed capacity, and further screen out the sites that meet the conditions by combining the upper and lower reservoir site data and construction conditions, and can promote small and medium-sized installed capacity solutions on a large scale, thereby enhancing market significance.

1. Name of the designed product: power station (cloud pivot hydro energy cycle). 2. Use of the designed product: for water conservancy power station. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The invention belongs to the field of hydroelectric energy optimization, and discloses an improved strength pareto algorithm and a multi-target scheduling method based on the algorithm, and the algorithm comprises the steps: an initialization stage: employing a Latin super-cubic method for sampling, and introducing a maximum and minimum criterion to adjust the position of a sample point; in the fitness assignment stage, a weighted Euclidean distance calculation formula is adopted, and the difference of each target is weighted; in the environment selection and truncation operation stage, all the individuals with the fitness smaller than 1 are selected from the combination set to be reserved, and the individuals exceeding the archiving threshold value are truncated according to the mixing distance; genetic manipulation: selecting individuals as parent generations through a champion to carry out adaptive crossover, and carrying out adaptive mutation operation on filial generation individuals obtained by crossover; a boundary correction and iteration termination step; more efficient information is improved through one-time global calculation; the multi-target scheduling method based on the algorithm plays a more excellent effect in reservoir optimization scheduling.

This invention relates to the field of hydropower energy optimization technology, specifically to a method, system, equipment, and medium for predicting the power generation capacity of cascade hydropower in a river basin based on the concept of energy banks and multi-dimensional feature engineering. The method first clearly defines the cascade hydropower generation capacity applicable to market analysis, defining it as an optimization problem of maximizing power generation under consideration of reservoir storage, future inflow, and multiple engineering constraints. Secondly, it establishes multi-dimensional feature engineering from four levels to provide high-quality input for subsequent accurate prediction. Finally, it establishes a TQnet model to capture the complex multiple periodicities, long-range dependencies, and key influencing factors in the power generation capacity sequence, achieving accurate prediction.

The invention relates to the technical field of hydroelectric energy, in particular to a safety protection device for a hydroelectric engineering water turbine, which comprises a stator, a rotor arranged in the stator, a protective cover and an impeller assembly rotationally mounted in the protective cover, the impeller assembly comprises a rotating shaft and blades annularly and uniformly distributed on the outer cylindrical surface of the rotating shaft; the stators are mounted right above the protective cover at intervals through a plurality of U-shaped supporting rods; the rotor sleeves the upper end of the rotating shaft; a containing assembly is installed at the lower end of the rotating shaft, an anti-corrosion assembly is arranged in the containing assembly, and the anti-corrosion assembly comprises a zinc plate. The primary battery is formed by water flow and the zinc plate, the zinc plate is used as the anode, and the impeller assembly is prevented from being corroded by corrosive substances in the water body in an anode sacrificing mode, so that the service life of the impeller assembly is prolonged. As the corrosion condition is reduced, the condition of axis deviation of the rotating shaft can be reduced, and structural abrasion and vibration caused by rotating shaft deflection are reduced.

The invention relates to the technical field of hydroelectric energy system transition process and control, in particular to a stability analysis method and system for a pumped storage-wind power nonlinear coupling system, and the method comprises the steps: building a nonlinear mathematical model covering a pumped storage power station, a wind power station and a power grid, deducing a stability criterion based on a Hopf bifurcation theory, and analyzing the stability of the pumped storage-wind power nonlinear coupling system. Drawing a stability domain taking the speed regulator parameters as coordinates, and after phase space trajectory simulation verification, carrying out sensitivity analysis on key parameters based on the stability domain; the system correspondingly comprises a modeling module, a criterion derivation module, a stability domain drawing module, a verification module and a sensitivity analysis module. The method and the system can accurately identify the stability boundary of the coupling system, define the parameter influence rule, provide support for parameter optimization and accurate control of the system, guarantee cooperative stable operation of the two, and assist large-scale grid connection of renewable energy sources.

The application relates to the technical field of water and electricity energy prediction, and discloses a watershed water and electricity power generation prediction method based on multi-source data fusion and deep learning, which comprises the following steps: collecting data information of water and electricity stations in a watershed, performing data fusion and space-time alignment on the data information, and constructing a meteorology-hydrology-engineering coupled data set; a grid scale dynamic effective rainfall coefficient model is constructed, and an effective rainfall space-time sequence considering space-time non-stationarity is calculated; according to the meteorology-hydrology-engineering coupled data set and the effective rainfall space-time sequence, multi-scale space-time feature engineering is performed; a multi-task physical constraint deep learning model with a shared feature extraction layer is established to predict water and electricity power generation; and the hyperparameters of the multi-task physical constraint deep learning model are optimized and updated online. By using the application scheme, the prediction accuracy and the model robustness are significantly improved, and reliable decision support is provided for complex watershed water and electricity dispatching.

The invention provides a whole-watershed hydropower centralized control operation simulation system and a construction method thereof, relates to the technical field of hydropower energy management and simulation, and provides a whole-watershed hydropower centralized control simulation model for overcoming the defects of the current centralized control simulation technology. And integration of a unit model, an auxiliary system model, a control protection device model and watershed hydrological information is comprehensively considered. And through accurate modeling and dynamic simulation, the dynamic interaction relationship and the overall operation characteristics of the hydropower station in the whole drainage basin can be comprehensively reflected. According to the full-drainage-basin simulation method, the accuracy and comprehensiveness of simulation are improved, and a more scientific and effective means is provided for optimal scheduling, fault prediction and emergency processing of the hydropower station.

The invention relates to the technical field of hydroelectric energy system transition processes, in particular to a multi-frequency dynamic characteristic control method and system for a pumped storage-wind power combined system, and the method comprises the steps: building a 11-order nonlinear mathematical model based on a pumped storage power station, a wind power station and a power grid; decomposing the dynamic response of the power grid frequency relative deviation value by adopting a fast Fourier transform analysis method to obtain different frequency wavelets; the influence of the nine subsystem characteristic parameters on the frequency and amplitude of each wavelet is analyzed, and the coupling relation is determined. The system correspondingly comprises a model building module, a spectrum decomposition module and a coupling analysis module. According to the method, accurate splitting of the multi-frequency wavelets is achieved, the technical blank is filled, theoretical support is provided for control strategy design, and stable operation and multi-energy complementation of the system are assisted.

The invention belongs to the technical field of power systems, and particularly discloses a double-layer optimization planning method and device for energy storage of a power system. In order to overcome the defect that collaborative planning of pumped storage and electrochemical energy storage in a novel power system is not researched at the same time in existing patents and literatures, the invention provides a method for constructing a pumped storage and electrochemical energy storage double-layer optimization planning model of the power system. According to the method, the constructed double-layer optimization planning model is constrained according to a Karush-Kuhn-Tucher condition, and a double-layer nonlinear optimization model is converted into a single-layer linear optimization model, so that collaborative planning of pumped storage and electrochemical energy storage can be realized, and efficient solution of the double-layer optimization planning model is also realized.

The invention discloses a control method of a water pumping compressed air energy storage system. The control method comprises a stable start-stop control strategy of a variable-speed water-turbine generator set and a stable start-stop control strategy of a variable-speed water pump set. The stable start-stop control strategy of the variable-speed water-turbine generator set comprises a start process of the variable-speed water-turbine generator set and a stop process of the variable-speed water-turbine generator set, a step-by-step instruction execution and closed-loop control strategy is adopted, an execution instruction is dynamically triggered according to a feedback signal, and stable control over the start-stop process of the variable-speed water-turbine generator set is achieved; the stable starting and stopping control strategy of the variable-speed water pump unit comprises a variable-speed water pump unit starting process and a variable-speed water pump unit stopping process, a step-by-step instruction execution and closed-loop control strategy is adopted, unit state parameters are monitored in real time, a feedback instruction is generated, the next execution instruction is triggered after strict judgment, and the stable starting and stopping of the variable-speed water pump unit is achieved. Stable control over the start-stop process of the variable-speed water pump unit is achieved. According to the method, the stable, safe and reliable starting and stopping process of the water turbine and the water pump is achieved through a step-by-step closed-loop control starting and stopping strategy in combination with cooperative monitoring of the sensor and the industrial personal computer.

This invention relates to the field of hydropower control technology, specifically a method and apparatus for optimizing the configuration of parameters in a hydropower unit speed control system. The method includes: constructing a hydropower unit speed control system model; obtaining guidance indicators for the configuration of various parameters of the hydropower unit speed control system model through curve analysis; and configuring the parameters of the hydropower unit speed control system based on these guidance indicators. This invention utilizes historical data to generate curves and uses curve analysis to obtain parameter configuration guidance indicators. The analysis process is simple, effectively reducing the professional requirements for personnel. Furthermore, it allows for continuous updating and correction using historical data, effectively improving the accuracy, rationality, and adaptability of the optimized configuration of hydropower unit speed control system parameters. This plays a significant role in the stable operation of the unit and improving regulation quality, providing technical support and assurance for the safe and stable transmission of hydropower energy.