374 results about "Hydro generator" patented technology

The invention provides a movable guide vane shaft sleeve area quality detection method, device and equipment, and belongs to the technical field of movable guide vane shaft sleeve detection. The method comprises the following steps: acquiring a target detection condition parameter; wherein the target detection condition parameters are obtained by optimizing detection condition parameters of a hydroelectric generating set movable guide vane simulation model determined by a simulation model constructed based on the hydroelectric generating set movable guide vane; and controlling the detection tool device to perform phased array detection on the shaft sleeve area of the movable guide vane of the hydroelectric generating set according to the target detection condition parameters, and identifying defects of the shaft sleeve area of the movable guide vane of the hydroelectric generating set. By optimizing the simulation model and the detection parameters, the precision, efficiency and reliability of shaft sleeve defect detection are remarkably improved.

According to the technical scheme, the fish-shaped bionic underwater suction cup detection robot is characterized in that the fish-shaped bionic underwater suction cup detection robot comprises a bionic fish robot, and the tail of the bionic fish robot is movably connected with an empennage; during use, an electric push rod can upwards abut against a rubber film to enable the rubber film to slightly protrude, after a suction cup ring is attached to the surface of an animal, the electric push rod pulls the rubber film to reset, air pressure is reduced, and therefore the primary suction installation effect is achieved; the rubber spikes vertically pierce the surface of the animal and are matched with the driving motor to shrink the rubber film, at the moment, the internal space of the air cavity is enlarged, the pressure is reduced, the internal and external pressure difference enables the equipment to be tightly attached to the surface of the animal, and water flows out of the drainage hole through the water inlet along with the movement of the animal and drives the impeller to rotate in the process; the hydroelectric generator generates electricity to charge the storage battery to increase the endurance of the storage battery, and the drainage plate is used for improving the drainage stability of water flow to prevent jittering caused by torrential turbulence.

The invention relates to the technical field of hydroelectric generators, in particular to a three-dimensional flow field load reconstruction method based on reinforcement learning of a gated circulation unit, which comprises the following steps of: establishing a Python-based finite element secondary development platform, and realizing finite element simulation and obtaining a finite element simulation result; fusing a plurality of simulation characteristic indexes extracted from the finite element simulation result by using a multi-scale model fusion algorithm to obtain a finite element simulation result evaluation index, and optimizing simulation parameters; constructing an initial three-dimensional flow field load reconstruction model based on reinforcement learning of a gated circulation unit, and training the initial three-dimensional flow field load reconstruction model by using the optimized simulation parameters; and based on the trained three-dimensional flow field load reconstruction model, obtaining a reconstructed three-dimensional flow field load. By means of the reconstruction method, automatic simulation of finite element software and full-automatic optimization iteration of a parameter decision and reinforcement learning reconstruction network in the three-dimensional flow field load reconstruction process of the hydroelectric generating set component can be achieved.

The invention relates to the technical field of water pumping energy storage, in particular to a compressed air energy storage and water pumping energy storage combined energy storage power generation system which comprises a high-point reservoir, a water pumping generator set and a low-point reservoir which are sequentially communicated from high to low. The high-point reservoir naturally stores water; water in the high-point reservoir can downwards flow into the hydroelectric generating set for power generation according to gravity; water flowing through the hydroelectric generating set for power generation can flow into the low-point reservoir according to gravity; the water pumping unit can pump water in the low-point reservoir into the high-point reservoir; the device further comprises a plurality of water-gas co-containing tanks. Water and air are contained in the water-air co-containing tank at the same time; the altitude of the water-gas co-containing tank is the same as that of the water pumping generator set; the water-gas co-containing tank is communicated with the high-point reservoir and the water pumping generator set simultaneously; water in the high-point reservoir can downwards flow into the water-gas co-containing tank according to gravity and compress air in the water-gas co-containing tank; and water in the water-gas co-containing tank can flow into the hydroelectric generating set under the extrusion of the compressed air to generate power.

The invention relates to a hydroelectric generator based on a bionic jellyfish and a self-powered ocean monitoring system.The hydroelectric generator comprises a bionic jellyfish structure, a mounting shell and a friction nanometer power generation assembly; the bionic jellyfish structure comprises a spherical-crown-shaped foam plate and an annular elastic piece, and the inner side of the annular elastic piece is connected with the outer side of the spherical-crown-shaped foam plate; the spherical-crown-shaped foam plate is fixedly connected with the top of the mounting shell, and the friction nanometer power generation assembly is mounted in the mounting shell; the friction nanometer power generation assembly comprises a plurality of electrode plates which are coaxial with the spherical-crown-shaped foam plate and arranged at intervals, the electrode plates comprise the first electrode plates and the second electrode plates, the first electrode plates are rigidly installed in the installation shell, and the second electrode plates are elastically installed in the installation shell; the friction nanometer power generation assembly generates power at least based on contact and separation between the first electrode plate and the second electrode plate. The problem that an existing small-scale wave energy conversion device is low in power generation efficiency is solved.

The invention relates to the technical field of hydroelectric generation, and discloses a power distribution method, device and equipment of a hydroelectric generating set, a medium and a product, the power distribution method of the hydroelectric generating set comprises the following steps: determining a plurality of preliminary power distribution schemes according to the power grid demand power and the rated power of the hydroelectric generating set; determining a target damage index and a target efficiency index corresponding to each preliminary power distribution scheme according to the working condition data of the plurality of hydroelectric generating sets in each preliminary power distribution scheme; fusing the target damage index and the target efficiency index to obtain a health degree corresponding to each preliminary power distribution scheme; according to the health degree, a target power distribution scheme is selected from the multiple preliminary power distribution schemes, and power is distributed according to the target power distribution scheme, the health degree is obtained by fusing the target damage index and the target efficiency index, the target power distribution scheme is selected according to the health degree, and the accuracy of the target power distribution scheme is improved.

The self-power-generation digital pressure reducing valve comprises a main valve and further comprises an electric pressure reducing guide valve, a water inlet of the electric pressure reducing guide valve is connected with a water inlet end of the main valve through a first pipeline, and a water outlet end of the main valve is connected with a water outlet of the electric pressure reducing guide valve through a second pipeline. A water outlet of the electric pressure reduction pilot valve is connected with a diaphragm upper cavity of the main valve control chamber through a third pipeline; the diaphragm lower cavity is connected with the outside through a fourth pipeline, a fifth pipeline is further connected between the water inlet end and the water outlet end of the main valve, and a hydroelectric generator is arranged on the fifth pipeline; the pressure detection devices are arranged in front of and behind the main valve; the controller is used for receiving detection signals of the pressure detection devices so as to control opening and closing of the electric pressure reduction pilot valve; and the hydroelectric generator is connected with the pressure detection device and the electric pressure reduction pilot valve. According to the digital pressure reducing valve, self power generation can be achieved, the power utilization requirement of electric equipment is met, and remote regulation and control can be achieved.

The invention provides a farmland irrigation water body suspended matter capturing device and a using method, the farmland irrigation water body suspended matter capturing device comprises a hydroelectric generator and a capturing device which are arranged in a ditch in the water flow direction, the bottom of the capturing device is provided with a low-position water passing channel, the end of the low-position water passing channel is provided with a valve plate moving along with rising of the water level, and the valve plate is used for blocking the low-position water passing channel; a plurality of rotating capturing frames are arranged at the top of the capturing device, and the rotating unfolding direction of the capturing frames is the same as the water flow direction; a plurality of electrode plates are arranged on the two sides of the capturing device, and each electrode plate comprises a positive electrode and a negative electrode which are arranged on the two sides of the capturing device respectively and used for adsorbing suspended solids in water. Through comprehensive utilization of hydroelectric generation, electrode plate electrostatic adsorption, mechanical filtration and automatic adjustment technologies, the problem that existing irrigation water is high in sand content is effectively solved, cleanliness of the irrigation water is ensured, and the efficiency and quality of farmland irrigation are improved. The technical scheme is simple and convenient to operate, low in maintenance cost, environment-friendly, energy-saving and wide in application prospect.

The invention discloses a hydroelectric generator output circuit, a shower and an electric energy conversion method, and belongs to the technical field of bathroom accessories. The hydroelectric generator output circuit comprises a rectification module, an overvoltage protection module, a voltage stabilization module, a channel identification switching module, a high-voltage channel module, a low-voltage channel module, a charging management module and a load interaction module. The rectifier module is used for rectifying alternating current power output by the hydroelectric generator into direct current power; the overvoltage protection module is used for detecting the DC power supply so as to output the DC power supply in a preset voltage range. The voltage stabilization module is used for outputting reference voltage to the channel identification switching module; the channel identification switching module is used for respectively controlling the on-off states of the high-voltage channel module and the low-voltage channel module according to the reference voltage and the direct-current power supply output by the overvoltage protection module; the low-voltage channel module is used for supplying power to the charging management module and the load interaction module. According to the invention, the electric energy conversion efficiency can be effectively improved.

The utility model provides an overhead digital display wash basin faucet which comprises a main body, a water outlet support arm is arranged at the upper end of the main body, a water outlet nozzle is arranged at the tail end of the water outlet support arm, a concave containing cavity is formed in the upper end of the main body, and a water outlet channel is formed in the center of the bottom of the containing cavity. The water outlet support arm is formed by stamping and welding a thin-wall pipe or a metal plate and is welded and fixed with the main body, an opening is formed in the upper end face of the water outlet support arm, and a mounting cylinder extending towards the accommodating cavity is arranged in the opening; the hydroelectric generator and the temperature adjusting device are mounted in the mounting cylinder. The utility model has the advantages of simple structure, light weight, low production cost and attractive integral appearance.

The present disclosure provides a method, apparatus and system for monitoring ultra-high frequency partial discharge of a hydro-generator, and belongs to the technical field of hydro-generator partial discharge monitoring. The method includes: cleaning a partial discharge pulse sequence using a cleaning threshold to obtain a valid pulse sequence; performing redundant data filtering on each data unit divided from the valid pulse sequence to obtain a first target pulse sequence for short-period partial discharge monitoring; determining sub-sequences that are partial discharge events from the valid pulse sequence, forming a second target pulse sequence after associating an amplitude statistical feature of the sub-sequences, and storing the second target pulse sequence. The aforementioned method combines data cleaning, redundant data filtering, and partial discharge event identification, which enhances the real-time performance of partial discharge monitoring and records the long-period partial discharge change trend. The corresponding system adopts a multi-buffer zone and multi-processor architecture, thus further improving the real-time performance of partial discharge monitoring.

The invention discloses a green and low-carbon constructed wetland thermal insulation system capable of realizing intelligent control. The system comprises a modular wetland unit, a hydroelectric generation module, a thermal insulation heating module, an intelligent control module and an energy storage and standby power supply module, the modularized wetland unit comprises a modularized shell as well as a plant covering layer, a water inlet layer, a wetland bed layer and a water outlet layer which are positioned in the shell and are sequentially arranged from top to bottom; the hydroelectric generation module is mounted on one side of the modularized wetland unit and comprises a water power module shell and a turbine pipeline type hydroelectric generator; electric energy output by the turbine pipeline type hydroelectric generator is supplied to the heat preservation heating module or stored in the energy storage and standby power supply module for standby application; the heat preservation heating module comprises a heat conduction layer arranged at the bottom of the modular shell and located below the water outlet layer, and an electric heating plate located below the heat conduction layer. The intelligent control module is used for analyzing the running state of the wetland in real time and dynamically optimizing the power generation and heating modes. The energy consumption can be reduced, and efficient and stable operation can be achieved.

The invention discloses an axial-flow type constant-rotating-speed power output device for a river channel and a hydroelectric generating set, and belongs to the technical field of hydroelectric generation. An axial-flow type constant-rotating-speed power output device for a river channel comprises a constant-speed adjusting assembly and an axial-flow driving assembly which are connected with each other. And a first output shaft of the axial flow driving assembly is connected with the constant-speed adjusting assembly. And the end part of a second output shaft of the constant-speed adjusting assembly is arranged outside the speed adjusting box body in a penetrating manner and is connected with a third connecting flange. A hydroelectric generating set comprises a generator, and the power input end of the generator is connected with a third connecting flange. The self-adaptive constant-speed power output device can be self-adaptive to river water flow changes to achieve constant-speed power output, meanwhile, the problems of impurity blockage and mechanical loss are solved, and finally stable and efficient operation of a generator set is guaranteed.

To provide a float-type hydraulic power generation device that can be easily transported to and installed at a desired location suitable for small hydraulic power generation, can be operated without interruption by dusts flowing in a water passage, and does not require external motive force.SOLUTION: A float-type hydraulic power generation device includes: a hydraulic turbine-type dust removal unit 2 which removes dust from water flowing in an open-channel water passage 6 such as a middle or small river and an agricultural water channel; a hydraulic power generation unit 3; and a float 4. The hydraulic turbine-type dust removal unit 2 and the hydraulic power generation unit 3 are integrally assembled into a unit assembly 5, with the former on an upstream side of the water passage 6 and the latter on a downstream side of the water passage 6. A duct 24, inside of which a hydraulic turbine of the hydraulic power generation unit 3 is disposed, is coupled and connected to a flow outlet which is provided in the hydraulic turbine-type dust removal unit 2 and through which clean water from which dust has been removed flows. The clean water flows through the flow outlet into the duct 24 to rotate the hydraulic turbine. The float 4 is coupled to the unit assembly 5 to hold the float in the flow passage 6 in a floating manner.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of water conservancy ship locks, and discloses a water delivery door positioning structure for a water conservancy ship lock, which comprises a water delivery door body and a remote controller, and a drainage mechanism is arranged in the water delivery door body. According to the water delivery door positioning structure for the water conservancy ship lock, by arranging the drainage mechanism, when water needs to be drained to raise the ship water level, information is sent to the controller through a remote controller, the controller enables an electric hydraulic telescopic rod to contract, a water blocking plate ascends along a sliding groove, water flow on the side with the high water level enters a filter screen, and impurities are filtered by the filter screen; the anti-collision rod prevents heavy objects from smashing the filter screen, water flow enters the straight pipe from the bent pipe and passes through the two hydroelectric generators, the two hydroelectric generators generate electric power and then transmit the electric power to the outside through wires to store the electric power, and after the water level rises, the water blocking plate moves downwards to be clamped in the clamping groove through the electric hydraulic telescopic rod. And environment-friendly power generation is achieved by facilitating water resource power generation.

The invention relates to the technical field of hydroelectric generator regulation and control, in particular to a hydroelectric generator dynamic regulation and control method and system based on environment change, which improve the operation efficiency and stability of the hydroelectric generator in a complex and changeable environment and enhance the safety and economy. The method comprises the following steps: according to a set acquisition frequency, continuously acquiring environment data information of a place where the hydroelectric generator is located; performing feature extraction on the environment data information acquired each time by using a preset trained key feature extraction model to obtain an environment key feature vector; performing fluctuation analysis on a plurality of continuous environment key feature vectors to obtain an environment fluctuation index; comparing the environmental fluctuation index with a preset fluctuation threshold value; and in response to the environment fluctuation index exceeding a preset fluctuation threshold value, inputting the latest acquired environment key feature vector into the hydroelectric generator environment influence analysis model to obtain a hydroelectric generator environment influence index.

The invention relates to the technical field of hydroelectric generator fault diagnosis, in particular to a hydroelectric generator fault monitoring method, system and device based on a complex network and a medium, a complex network model is constructed based on an actual hydroelectric generator set, and all parts of the hydroelectric generator set serve as nodes of the complex network model. Performing node edge connection according to the weight coefficients of the features between the nodes to obtain an adjacent matrix of the complex network model; acquiring operation data in real time according to sensors arranged on all parts of the actual water-turbine generator set, wherein the operation data comprises at least one of temperature, pressure, current, voltage and vibration frequency; calculating a complex network index according to the operation data and the complex network model; and comparing the complex network index with the network index reference value, and identifying the abnormal condition of the network index by using a statistical analysis method based on a comparison result. According to the method, fault monitoring and analysis can be accurately carried out.

The water flow switch control device comprises a valve body, a base and a battery box, the valve body is divided into a circuit board wiring cavity and a water flow thrust cavity through a partition plate, the partition plate is provided with a guide column, and the guide column is provided with a water outlet and a water outlet. A temperature sensor mounting hole is formed in the partition plate; a circuit board is installed in the circuit board wiring cavity, a water flow switch and a temperature sensor are installed on the circuit board, a power supply waterproof plug and an output electrical equipment wire plug are electrically connected to the outer side face of the circuit board, an inner cavity of the circuit board wiring cavity is packaged through glue pouring, and a magnet assembly is installed at the tail end of the reset spring. The structure is simplified, the waterproof effect is good, the movement of the magnet assembly becomes more stable, the use reliability and the installation and use convenience are improved, and the use range is widened. The shower head can be used on faucets of kitchens and washstands and concealed or exposed shower heads. And a hydroelectric generator can be replaced.

The invention discloses a PID parameter setting method for suppressing conflict between primary frequency modulation and secondary frequency modulation of a hydroelectric generating set, and belongs to the technical field of hydroelectric generating set adjustment. Comprising the following steps: S1, calculating an initial value of a PID (Proportion Integration Differentiation) parameter according to a water diversion system water flow inertia time constant and a hydroelectric generating set mechanical inertia time constant; s2, taking the PID parameter initial value of the speed regulator as a PID parameter value, solving the root of the characteristic equation in the S1, and calculating a unit power dynamic analytical expression during frequency unit step disturbance according to a Fisher method of a quartic equation; s3, calculating an analytic expression of the hydroelectric generating set power square error integral quantity based on the unit power dynamic analytic expression; and S4, calculating a speed regulator PID parameter formula for suppressing the conflict between the primary frequency modulation and the secondary frequency modulation of the hydroelectric generating set according to the analytic expression of the unit power square error integral quantity and the initial value of the speed regulator PID parameter. The problem that the dynamic process of primary frequency modulation and the dynamic process of secondary frequency modulation conflict is solved, and the adjusting capacity of the hydroelectric generating set can be brought into full play.

The invention relates to a bionic water turbine blade and a three-dimensional structure thereof, which are suitable for an efficient hydroelectric generating set. According to the blade, the hydrodynamic performance is optimized through the outer ridges and the inner ridges which are evenly distributed on the outer contour and the inner contour respectively, the five outer ridges refer to geometric arrangement of fish scales, the stability of a boundary layer is improved, and fluid separation is reduced; the three inner ridges imitate a wing middle shaft framework, and the fluid guiding efficiency is enhanced. The overall shape of the blade simulates the curved surface of a fin, and microstructure bionic optimization is carried out on the surface to reduce water flow resistance and enhance self-cleaning capacity. The blade is made of a high-strength corrosion-resistant alloy material, and a waterproof coating is added on the surface of the blade to adapt to a complex underwater environment. According to the bionic design, the energy capture efficiency, the structural strength and the environmental adaptability of the water turbine are remarkably improved. And by adjusting geometric parameters of the blade and the distribution density of the ridges, different hydroelectric generation working conditions are adapted, and the wide and practical application value is achieved.

The utility model provides a hollow waterway type digital display wash basin faucet which comprises a main body, a water outlet support arm is arranged at the upper end of the main body, a water outlet nozzle is arranged at the tail end of the water outlet support arm, the main body is formed by cutting a thin-wall pipe, and the water outlet support arm is formed by stamping and welding a thin-wall pipe or a metal plate and is fixedly welded with the main body; the upper end of the main body is also provided with an isolation cylinder positioned in the water outlet support arm; the outer wall of the isolation cylinder and the inner cavity of the water outlet support arm form a water outlet cavity communicated with the water outlet nozzle; the water outlet pipe penetrates through the main body from bottom to top to reach the isolation cylinder, is fixedly welded with the inner wall of the isolation cylinder and is communicated with the water outlet cavity; the top of the isolation cylinder extends to the top of the water outlet support arm and is provided with an opening, and a display screen is arranged in the opening; a hydroelectric generator and a temperature measuring head connected with the hydroelectric generator are arranged below the main body, and a water outlet of the hydroelectric generator is connected with a water outlet pipe; the device further comprises a temperature adjusting device. The utility model has the advantages of simple structure, light weight, low production cost and attractive integral appearance.

The invention discloses a water-drive gas-storage energy storage power station transformed from a waste mine, relates to the technical field of long-time large-scale energy storage power stations, and aims to construct the long-time large-scale energy storage power station by taking gas such as carbon dioxide as an energy storage medium and water as an energy conversion medium and by virtue of underground space resources of the existing mine. The underground space of the abandoned mine is divided into a reservoir, a water sump and a gas sump, and the gas sump is filled with high-pressure gas such as carbon dioxide and connected with the water sump through a communicating pipe; a water inlet pipe and a water return pipe are respectively communicated between the water sump and the reservoir, a hydroelectric generating set and a valve are arranged on the water inlet pipe, and a water pump is arranged on the water return pipe. The system is charged through the water pump, the power grid is discharged through the hydroelectric generating set, and the function of a long-time large-scale energy storage power station is achieved. Liquid carbon dioxide is adopted as an energy storage medium, and the national dual-carbon policy is met. The system is an extension of a pumped storage power station and air energy power generation, and the efficiency is better.

The invention relates to the technical field of pipeline power generation, and discloses a timed automatic irrigation device using pipeline flow as a power source, the timed automatic irrigation device comprises a water inlet pipe and a timed irrigation device, one end of the water inlet pipe is connected with a pretreatment pipe, and the pretreatment pipe is internally provided with a pretreatment assembly, a connecting pipe and a water hammer eliminating assembly; one side of the connecting pipe is communicated and connected with a side branch pipe, the side branch pipe is connected with a direct-current hydroelectric generator, and in addition, a lithium battery electrically connected with the timing irrigation device and the generator at the same time is further arranged. The direct-current hydroelectric generator is matched with the lithium battery to supply power to the timing irrigation device. A conventional dry battery and a solar system are replaced, pollution of the dry battery is reduced, all-weather use can be achieved, limitation of raining or weak light environments is avoided, impact damage of water flow to the impeller can be reduced through cooperation of the connecting pipe and the water hammer eliminating assembly, damage of pressure change in a pipeline to the pipeline can be reduced, and the service life of equipment is prolonged.

The invention solves the problem that when a filter in an oil tank cooling system is replaced, oil flowing needs to be suspended, and relates to the field of oil tank cooling, in particular to a hydroelectric generator oil tank cooling system which comprises a cooling oil tank motor installed on an oil tank tank and used for circularly feeding oil into a generator, and a plate heat exchanger is installed at the top of the oil tank tank. An oil return pipe connected with the generator is arranged above the plate heat exchanger, a filter used for filtering oil liquid in the stage that the oil liquid in the oil return pipe is conveyed into the plate heat exchanger is installed on the oil tank, the filter comprises a support plate installed on the oil tank, and a flow dividing box in butt joint with the oil return pipe is installed on the support plate. Two filtering assemblies are installed at the bottom of the flow dividing box, and a plugging assembly used for guiding backflow oil liquid to flow into one filtering assembly is installed in the flow dividing box. The two filter assemblies are alternately used, replacement and cleaning are facilitated, and meanwhile the system can work uninterruptedly.

The utility model relates to the technical field of hydroelectric generators, and discloses a hydroelectric generator with an anti-winding function, which comprises a generator rotor, a support column, an outer shell and a turbine blade, the top end of the turbine blade is connected with a rotating shaft, the outer part of the rotating shaft is connected with a connecting rod, and the outer part of the connecting rod is sleeved with an intercepting sleeve. According to the hydroelectric generator with the anti-winding function, the intercepting sleeve is arranged on the front side of the turbine, the effects of blocking and collecting filiform impurities such as aquatic plants can be achieved, the problem that the filiform impurities are wound on turbine blades and are not easy to clean is solved, a plurality of burrs are arranged outside the intercepting sleeve, the intercepting efficiency can be improved, and the practicability is high. And meanwhile, through cooperation of a connecting rod and an intercepting sleeve, the intercepting sleeve can be detached, so that convenience is provided for cleaning of the intercepting sleeve, and manual operation is facilitated.

The utility model relates to a multi-energy complementary energy system, which comprises a multi-energy power generation part, a multi-energy complementary converter, an energy storage system and a power grid, the multi-energy power generation part comprises a wind driven generator, a photovoltaic array and a hydroelectric generator; the multi-energy complementary converter comprises two AC / DC rectifiers, a photovoltaic MPPT controller, a bidirectional DC / AC inverter and a DC bus, the two AC / DC rectifiers are electrically connected with the wind driven generator and the hydroelectric generator respectively, the photovoltaic MPPT controller is electrically connected with the photovoltaic array, the energy storage system comprises a bidirectional DC / DC module and a super capacitor, and the super capacitor is connected with the DC bus through the bidirectional DC / DC module; the power grid is connected with the direct current bus through the bidirectional DC / AC inverter; when the system is used for supplying power to the electric equipment, energy conservation and emission reduction can be realized, meanwhile, the power operation cost is greatly reduced, and great economic benefits are brought.

The invention discloses a hydroelectric generator working state evaluation method and system, and the method comprises the steps: obtaining and analyzing the operation monitoring parameter data of a hydroelectric generator, and determining key operation parameters which affect the safe operation of the hydroelectric generator; analyzing and evaluating the operation safety state of the hydroelectric generator based on the data corresponding to the key operation parameters to obtain an operation safety state evaluation value; obtaining performance index data of the hydroelectric generator, and analyzing and evaluating the performance index data to obtain a performance evaluation value; determining a working state evaluation value of the hydroelectric generator based on the operation safety state evaluation value and the performance evaluation value, and determining a working state grade according to the working state evaluation value; and judging whether the working state of the hydroelectric generator is normal or not according to the working state grade, and sending out an early warning prompt after judging that the working state is abnormal. Operation of the hydroelectric generator is guided by comprehensively evaluating the working state of the hydroelectric generator, the safety, reliability and efficiency of equipment can be improved, and continuous and stable operation of the equipment is ensured.

The invention relates to a miniature hydroelectric generator which comprises an impeller chamber arranged in a pipeline and a generator set arranged on one side of the impeller chamber, the generator set comprises a shell, a stator and a rotor, the stator and the rotor are arranged in the shell, the rotor comprises an impeller and a rotating shaft arranged in the center of the impeller, a permanent magnet is arranged at one end of the impeller, and the permanent magnet is arranged at the other end of the impeller. One end of the permanent magnet is arranged in the impeller chamber, the other end of the permanent magnet is provided with blades, one end of the permanent magnet corresponds to the stator, the blade ends are arranged in the impeller chamber, and the blades rotate in the impeller chamber to drive the rotor to rotate; the impeller chamber is connected with a water inlet and a water outlet of the pipeline, and the inner wall of the impeller chamber comprises two concentric arcs with different radiuses and a connecting arc for connecting the two concentric arcs; a cavity for containing water flow is formed between the large-radius arc inner wall of the impeller chamber and the blades. The miniature hydroelectric generator can make full use of kinetic energy of water and is high in power generation power.

The invention discloses a control method for performing primary frequency modulation in a power dead zone range of a hydroelectric generating set, and belongs to the technical field of hydroelectric generating set adjustment. Comprising the following steps: S1, calculating H1 and H2 of a water diversion system according to a water flow inertia time constant and a unit mechanical inertia time constant of the water diversion system; s2, calculating a unit power dynamic analytical expression during frequency unit step disturbance; s3, calculating a first-order differential link coefficient decomposed by a second-order correction link based on the unit power dynamic analytical expression; and S4, calculating the output quantity of the PID speed regulator in the current sampling period. According to the scheme, the oscillation link transfer function parameters in the dynamic process are calculated, the second-order system correction transfer function with the given frequency value is designed on the basis, it is guaranteed that the unit power does not oscillate when the unit frequency is given to change, the problem that the power exceeds a power dead zone in the dynamic process is prevented, and the power efficiency is improved. And meanwhile, an amplitude limiting link is arranged at the frequency deviation value so as to ensure that the power steady-state value exceeds the power dead zone range.

The invention relates to the technical field of water meters, in particular to a water meter power supply device based on hydraulic pressure difference, which comprises a high-pressure water supply pipeline, a normal-pressure water supply pipeline and an electric cabinet, a connecting pipe is fixedly connected between the high-pressure water supply pipeline and the normal-pressure water supply pipeline, and a hydroelectric generator and an electromagnetic valve are arranged on the connecting pipe; compared with the prior art, the water meter power supply device can depend on a water supply pipeline system where the remote water meter is located, water flow is generated through the water pressure difference between the high-pressure water supply pipeline and the normal-pressure water supply pipeline, stable and reliable electric power is provided under the action of the micro hydroelectric generator to drive a remote water meter reading system, and electric power supply is stable and reliable. Compared with the prior art that an electricity meter is installed by a power supply company, the limited area is small, the cost is low, the provided power is direct current 12V power, and compared with the mode that 220V alternating current is converted into direct current 24 / 12V power, the safety coefficient is higher, and the problem that part of meter reading stations have no power can be solved.