27 results about "Hydro energy" patented technology

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.

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;

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 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.

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.

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 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 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.

The impact engine comprises an engine body, a pressure bin, a crankshaft transmission assembly, a water guide mechanism and a starting assembly, the water guide mechanism comprises a flow guide pipe, water inlet pipes and a cut-off disc, the multiple water inlet pipes are fixedly installed on the surface of the engine body, the water outlet end of each water inlet pipe communicates with a water outlet, and the water outlet end of each water inlet pipe communicates with a water outlet; the water inlet pipe communicates with the pressure bin through the flow guide pipe, and the cut-off disc is rotationally arranged in a water outlet of the machine body and fixedly connected with the bottom end of the crankshaft body. A rotating wheel water bucket is replaced by the crankshaft transmission assembly, the pressure bin and the water guiding mechanism are arranged, the water guiding mechanism controls on-off of water flow, water hammer pressure is generated in the pressure bin, the piston is acted through the water hammer pressure, the crankshaft transmission assembly is driven to operate to generate rotating power, and high-speed water flow impacts the cut-off disc. The water bucket does not directly act with a piston and other key components, power transmission is achieved in the mode of sacrificing the cut-off disc, and the problem that in the prior art, a runner water bucket is prone to abrasion is solved.

The invention relates to the technical field of hydroelectric energy automation control, in particular to a small hydropower station water level prediction and double-loop control method based on an improved LSTM (Long Short Term Memory) model, which comprises the following steps of: acquiring dam front water level, reservoir inflow, reservoir outflow and generator active power data in real time, and performing filtering and synchronous processing to form an input data set; reinforcing the reservoir flow characteristic weight through an improved LSTM model embedded with an attention mechanism, and outputting a water level prediction sequence; the outer ring takes the maximization of the total power generation income as a target, and generates a power setting instruction in combination with security constraint optimization; the inner ring drives the guide vane opening degree to be adjusted through a parameter self-tuning fuzzy PID controller so as to realize accurate power tracking; and updating data through closed-loop feedback, and circularly executing prediction, optimization and control. The water level prediction precision and the control response speed are improved, the operation safety and the power generation income are considered, and the automatic and intelligent operation requirements of the small hydropower station are met.

The invention is suitable for the technical field of hydroelectric energy, and discloses a hydrogenerator governor power adjusting method, system, equipment and medium, the method comprises the following steps: according to the characteristics of a water turbine, the governor adopts a two-stage starting mode and configures an opening limit self-adaptive function, enters an opening mode to operate, and determines a power target given value; according to the power mode control strategy and the power supply memory, generating an adjusting instruction of the opening degree of the guide vane through the deviation between a power target given value and a real-time actual power value so as to realize power closed-loop control in the opening degree mode; and when the preset switching condition is met, controlling the speed regulator to quit the power closed-loop control and maintain the operation in the opening mode. According to the method, load fluctuation is limited in a dead zone range through governor opening mode control based on power supply memory, real-time control over load disturbance of the water turbine is achieved, the operation working condition of the water turbine is optimized, and various problems such as hydraulic interference under the special working condition of one hole and two turbines are solved.

The invention provides a compressed air energy storage and pumped storage coupled variable-pressure and constant-pressure operation system and method. The compressed air energy storage and pumped storage coupled variable-pressure and constant-pressure operation system comprises a compressed air energy storage system, a pumped storage system, a water conveying pipeline and a water channel automatic cut-off valve. An energy storage bin of the compressed air energy storage system is connected to a pumped storage power station lower reservoir of the pumped storage system through a water conveying pipeline, and a water channel automatic cut-off valve is installed on the water conveying pipeline, so that the energy storage bin of the compressed air energy storage system is in hydraulic connection with a pumped storage power station upper reservoir through a pumped storage power station water diversion system; and variable-pressure and / or constant-pressure operation of the compressed air energy storage system is realized. By means of the method, compressed air energy storage variable pressure and constant pressure two-section operation can be achieved, the energy storage efficiency is improved, meanwhile, the space needed by a compressed air energy storage bin is greatly reduced, and the compressed air energy storage investment cost is greatly reduced. Meanwhile, through adjustment of a pipeline valve, the energy storage bin can achieve the function of an air cushion type surge shaft of the pumped storage power station.

The application belongs to the field of water and electricity energy optimization, and discloses an improved strength pareto algorithm and a multi-objective scheduling method based on the algorithm. The algorithm comprises an initialization stage: a Latin hypercube method is used for sampling, and a maximum minimum criterion is introduced to adjust the position of sample points; an adaptability assignment stage: a weighted Euclidean distance calculation formula is used to weight the difference of each target; an environment selection and truncation operation stage: all individuals with an adaptability less than 1 are selected from a merged set to be reserved, and individuals exceeding an archive threshold are truncated according to a mixed distance; a genetic operation: individuals are selected as parents through a tournament to perform adaptive crossover, and adaptive mutation operation is performed on the offspring individuals obtained through the crossover; a boundary correction and iteration termination step; higher efficiency information is improved through one-time global calculation; and the multi-objective scheduling method based on the algorithm has more excellent effects in reservoir optimization scheduling.

The invention belongs to the technical field of energy storage, and particularly provides a hybrid energy storage system control method based on flywheel energy storage and constant-speed pumped storage, which comprises the following steps that: when the frequency of a power grid is in a normal state, a flywheel energy storage system adopts a double-closed-loop PI control strategy, takes power or rotating speed as an outer loop and takes current as an inner loop; the constant-speed pumped storage unit adopts a power control mode; when the frequency of the power grid fluctuates, if the constant-speed pumped storage unit is in a power generation working condition, the flywheel energy storage system and the constant-speed pumped storage unit both participate in the frequency modulation of the power grid; when the frequency of the power grid fluctuates, if the constant-speed pumped storage unit is in a water pumping working condition, the constant-speed pumped storage unit cannot participate in the frequency modulation of the power grid as a load, and the flywheel energy storage system participates in the inertial response and primary frequency modulation stage. According to the invention, the problem of output reverse regulation when the constant-speed pumped storage unit participates in power grid frequency modulation is solved, and a more stable and reliable method is provided for the operation control of the constant-speed pumped storage unit.

The application discloses a kind of monthly power generation capacity evaluation methods of hydropower station based on typical year optimization.The method comprises the following steps: constructing the total objective function of cascade hydropower station;The initial operation scheme of power generation of cascade hydropower station in wet, flat and dry typical year is optimized, and the optimized operation scheme of power generation of cascade hydropower station in wet, flat and dry typical year is obtained;The minimum monthly power generation capacity of hydropower station, the maximum theoretical monthly power generation output and the maximum monthly operation power generation output of hydropower station are obtained, and the maximum monthly power generation capacity of hydropower station is obtained based on the maximum theoretical monthly power generation output and the maximum monthly operation power generation output of hydropower station, to evaluate the monthly power generation capacity of hydropower station.The application uses the dynamic coupling check of theoretical value and practical value, so that the obtained monthly power generation capacity evaluation result of hydropower station covers the extreme working condition of hydropower station operation, and also considers the optimization operation experience of hydropower station, has engineering practicability and theoretical completeness, and can more effectively guide the optimization scheduling work of hydropower energy.

According to the compressed air pressurization pumped storage system and method, pressure containers are arranged in a layered mode from top to bottom, and each layer comprises one or more communicated pressure containers. A liquid level sensor is arranged in the pressure container, a pressure detection device is arranged in the pressure container located on the lowermost layer, and the liquid level sensor and the pressure detection device are in signal connection with the controller. The pressure container is connected with an external water source through a water conveying pipeline, and water driving equipment is arranged on the water conveying pipeline. The top of the inner cavity of the pressure container is communicated through a gas pipeline, and a valve for controlling on-off of a gas path is arranged on the pipeline. The method comprises an energy storage stage and an energy release stage, the pressure container is filled with water from top to bottom in the energy storage stage, and the pressure container is drained from bottom to top in the energy release stage. According to the system and method provided by the invention, the energy storage density in unit space is improved, and the total pressure fluctuation at the inlet of the water turbine can be effectively stabilized.

The present invention provides a system and method for coupled variable pressure constant pressure operation of compressed air energy storage and pumped storage, comprising a compressed air energy storage system, a pumped storage system, a water pipeline, and an automatic waterway shut-off valve; the energy storage bin of the compressed air energy storage system is connected to the lower reservoir of the pumped storage power station of the pumped storage system through a water pipeline, and an automatic waterway shut-off valve is installed on the water pipeline, so that the energy storage bin of the compressed air energy storage system is hydraulically connected to the upper reservoir of the pumped storage power station through the water diversion system of the pumped storage power station, thereby realizing variable pressure and / or constant pressure operation of the compressed air energy storage system. This method can realize the two-stage operation of compressed air energy storage with variable pressure + constant pressure, improve the energy storage efficiency, greatly reduce the space required for the compressed air energy storage bin, and significantly reduce the investment cost of compressed air energy storage. At the same time, through the adjustment of the pipeline valve, the energy storage bin can realize the function of an air cushion-type pressure regulating well of the pumped storage power station.

This invention discloses an underground hydrogen storage system coupled with pumped hydro storage, belonging to the field of underground hydrogen storage technology. The system includes a hydrogen production and compression unit, a pumped hydro storage-underground hydrogen storage geological pressure dual control unit, a hydrogen dissolution separation-heat closed-loop unit, an adsorption purification-regeneration unit, and a main controller. Each unit is controlled by the main controller to achieve system-wide adaptive regulation; the main controller incorporates a geological stress-hydrogen storage pressure dual-closed-loop PID control algorithm. This invention achieves deep coupling of pumped hydro storage and underground hydrogen storage through hydrogen-water coordinated flow matching, a graded geological buffer-sealed integrated structure, heat closed-loop recovery, and adsorbent recycling. It solves the problems of high geological risk, large pressure fluctuations, residual hydrogen extraction, and low energy utilization in existing underground hydrogen storage systems. It enables complete hydrogen extraction with no residue, and the system's heat closed-loop is self-sufficient, adapting to the intermittent power generation characteristics of renewable energy, and is suitable for large-scale green hydrogen storage and grid peak shaving.