3417results about "Wind motor combinations" patented technology

The invention relates to the technical field of wind power generation. The invention provides a wind field unit comparison type fault diagnosis method, system and device and a storage medium. The method comprises the following steps: synchronously acquiring operation and corresponding environment data of units of the same type in the same wind field, and establishing a multi-dimensional data set; building a normal working condition multi-dimensional parameter reference model by using clustering analysis and updating in real time; performing multi-scale comparison on a target and a reference unit, and extracting feature fusion to generate a comprehensive health index; establishing a double-layer diagnosis model, constructing a virtual unit based on digital twinning in the first layer, comparing residual errors and positioning a potential fault source, detecting outliers by using an improved isolated forest algorithm in the second layer, determining a fault propagation path in combination with an association rule, and establishing a fault mode knowledge base; and triggering an early warning mechanism according to the comprehensive health index and the fault mode classification. The problems that a traditional operation and maintenance mode is difficult in fault prediction, high in cost and lack of a reliable evaluation system, state monitoring is limited to a single parameter, multi-unit comparative analysis means are insufficient, and fault diagnosis is lagged are solved.

The invention relates to the technical field of new energy pipelines, in particular to an anti-cracking hydrogen-doped pipeline system and a performance degradation monitoring method thereof. The hydrogen-doped pipeline system comprises a pipeline assembly, a supporting assembly, an operation assembly, a power assembly, a storage battery pack, a system control cabinet and a power generation assembly, the phenomena of hydrogen permeation and gas stratification are effectively inhibited through innovative pipeline structure design and material optimization in the system level, the hydrogen embrittlement risk is reduced from the source, and the energy consumption is reduced. According to the method, the hydrogen atom diffusion tracking and crack initiation prediction are combined, and a multi-scale collaborative monitoring system is constructed, so that the whole-process monitoring from hydrogen atom diffusion tracking to crack initiation prediction is realized, and particularly, a quantum dot marking technology is combined with a traditional sensing network, so that the service life of the pipeline can be effectively prolonged, and the reliability and the maintenance efficiency of safety monitoring are improved.

A control system configured to control switching of taps of an on-load tap changer provided on an electric power transformer. The on-load tap changer includes switches that are controllable to switch between transformer taps. The control system includes a detector configured to detect an indication of a zero crossing of a transformer voltage of the transformer and a control signal generator configured to generate a control signal that controls a switching of the switches for performing a tap change to a new transformer tap. The control signal generator is configured to determine the timing of the control signal for changing the transformer tap based on the detected indication of the zero crossing of the transformer voltage such that the switching of at least one of the switches for performing the tap change occurs a predetermined time prior to a zero crossing of a tap voltage at the new transformer tap.

The invention discloses a ducted layout rigid-flexible mixed structure mooring aerostat type high-altitude wind power generation system which comprises an air aerostat wind power generation system, an air-ground electric energy transmission and mooring cable and a ground anchoring system, and the air aerostat wind power generation system is connected with the ground anchoring system through the air-ground electric energy transmission and mooring cable. The air aerostat wind power generation system comprises a ducted thin-wall truss bearing structure, an annular air bag, an empennage, a skin component and a wind power generator set, and the ducted thin-wall truss bearing structure is provided with a plurality of constraint spaces distributed in the longitudinal direction; the plurality of annular air bags are respectively arranged in the plurality of constraint spaces; a plurality of empennages are arranged at the rear part of the ducted thin-wall truss bearing structure; the ducted thin-wall truss force bearing structure and the multiple empennages are sleeved with the skin component. The wind generating set is installed in the ducted thin-wall truss force bearing structure through the supporting structure. The device is stable in structure, can stably generate power in a long-time air-staying mode, is low in cost, and is autonomous and controllable.

The invention provides a wind turbine generator transmission chain fault detection method and device, and relates to the technical field of fault detection.The wind turbine generator transmission chain fault detection method comprises the steps that time sequence operation data and state waveform data of a wind turbine generator transmission chain are obtained; determining an abnormal characteristic index of the transmission chain of the wind turbine generator according to whether the time sequence operation data meets a preset target rule or not; according to the state waveform data, determining a time domain characteristic index and a frequency domain characteristic index of a transmission chain of the wind turbine generator; and based on the abnormal feature index, the time domain feature index and the frequency domain feature index, determining fusion features, and determining a fault detection result of the wind turbine generator transmission chain according to the fusion features, thereby solving the technical problems of incomplete data feature mining and low fault detection accuracy in the prior art.

The invention relates to the technical field of wind power generation, and particularly discloses a duct double-turbine supercharged windmill which comprises a duct and a blade type rotating structure arranged in the duct. The duct sequentially comprises a first contraction section, a first straight section, a second contraction section and a second straight section in the air flow direction, and the diameter of the first straight section is larger than that of the second straight section. The blade type rotating structure comprises a rotating shaft, a first-stage turbine and a second-stage turbine, the first-stage turbine and the second-stage turbine are arranged on the rotating shaft, the first-stage turbine and the second-stage turbine are correspondingly arranged on the first straight section and the second straight section respectively, and the rotating shaft is connected with the generator through a transmission structure. Structural improvement is carried out through the blade type rotating structure and the duct, the turbofan located at the front end drives the turbofan located at the rear end to rotate, and therefore the wind energy utilization rate is increased.

The invention relates to the technical field of wind power equipment detection, in particular to a wind turbine generator blade fracture damage detection method applying an inspection robot, which comprises the following steps of: S1, constructing a blade three-dimensional point cloud model and positioning the position of the robot in real time through a laser radar and a visual SLAM (Simultaneous Localization and Mapping) module carried on a robot body; s2, generating a spiral detection path covering the surface of the blade based on a path planning algorithm optimized by the genetic algorithm; s3, synchronously collecting blade surface data by adopting a multi-mode sensor array, wherein the blade surface data comprise pulse thermal imaging data, ultrasonic guided wave signals and high-resolution visible light images; s4, performing feature fusion on the acquired data through a deep convolutional neural network; through multi-modal sensor cooperative detection, deep learning feature fusion and digital twinborn evaluation technologies, full-process automatic detection from damage identification to life prediction is realized, the detection precision and efficiency are significantly improved, and reliable guarantee is provided for safe operation of the wind turbine generator.

The invention discloses a deep and far sea wind power foundation platform and load integrated system under extreme environment conditions, and belongs to the technical field of offshore wind power platforms. The system comprises a basic platform body, a multi-dimensional monitoring subsystem, an environment-load coupling analysis subsystem, an intelligent regulation and control execution subsystem, a safety early warning decision subsystem and a shore-based collaborative management subsystem. Through synchronous acquisition of extreme marine environment, basic platform structure load and operation state data, distributed multi-type sensor layout and high-frequency sampling, data acquisition comprehensiveness and timeliness are realized, monitoring data are fused, a coupling model is constructed, 24-hour load change is predicted, and the real-time performance of the system is improved. According to the method, the attitude of the platform is dynamically adjusted, bearing configuration is optimized, emergency protection is started, the limitation of traditional separation analysis and fixed regulation and control is broken through, and the risk disposal and operation and maintenance efficiency is improved through risk quantification and grading early warning, remote monitoring and intelligent scheduling of a shore-based collaborative management subsystem and four-level early warning accurate matching coping strategies.

The invention discloses an aerostat with a built-in pressure adjusting structure, a wind power generation system and a control method, the aerostat of one embodiment comprises an auxiliary air bag, the pressure adjusting structure arranged in the auxiliary air bag and a pressure control structure arranged outside the auxiliary air bag, the pressure adjusting structure comprises an air duct pipe, a first valve arranged at one end of the air duct pipe, a second valve arranged at the other end of the air duct pipe and a fan arranged in the air duct pipe and located between the first valve and the second valve. The pressure control structure comprises a controller and a differential pressure sensor, and the controller is used for controlling the fan, the first valve and the second valve to exhaust or inflate the auxiliary air bag according to the air pressure, sensed by the differential pressure sensor, of the bag body. According to the embodiment, the pressure adjusting structure of the aerostat is integrally arranged in the auxiliary air bag, the beneficial effects of being compact in structure, good in air tightness and the like are achieved, the stability and reliability of the aerostat are remarkably improved, and the practical application value is achieved.

The invention relates to a vertical axis wind-flow energy power generation platform and an operation method thereof.The vertical axis wind-flow energy power generation platform comprises a platform body, an adjustable gearbox, a vertical axis fan and a vertical axis water turbine, and the platform body comprises a main stand column and a plurality of auxiliary stand columns; the adjustable gearbox is arranged in the main stand column; the vertical shaft fan comprises a fan shaft and a plurality of fan blades; the vertical shaft water turbine comprises a water turbine shaft and a plurality of water turbine blades; a fan shaft is connected with one end of the adjustable gearbox, and a water turbine shaft is connected with the other end of the adjustable gearbox; the transmission ratio gamma is adjusted through the adjustable gearbox, gamma = n wind / n flow, n wind is the rotating speed of the vertical axis fan, and n flow is the rotating speed of the vertical axis water turbine; and the rotating directions of the vertical shaft fan and the vertical shaft water turbine are opposite. Functional coupling of the vertical-axis fan and the vertical-axis water turbine is achieved by adjusting the transmission ratio of the adjustable gearbox, the vertical-axis fan and the vertical-axis water turbine are combined into a whole, and offshore wind energy and tidal current energy can be developed at the same time.

The wind power generation equipment with the heat dissipation mechanism comprises a shell, a base is fixedly connected to the bottom of the inner wall of the shell, a power generator is fixedly connected to the top of the base, a round rod is fixedly connected to a driving shaft of the power generator, and a speed increasing box is fixedly connected to the end, away from the power generator, of the round rod; a wind wheel shaft is fixedly connected to the side, away from the round rod, of the speed increasing box, a hub is fixedly connected to the end, away from the speed increasing box, of the wind wheel shaft, blades are fixedly connected to the hub, a cooling device is fixedly connected to the top of the inner wall of the shell, air cooling devices are fixedly connected to the two sides of the inner wall of the shell, and rectangular holes are formed in the two sides of the shell. According to the wind power generation equipment with the heat dissipation mechanism, when a power generator works to generate heat, a water pump is started, cooling liquid in a cooling liquid box is pumped, the cooling liquid enters a cooling liquid pipe through a water outlet pipe and a folding pipe, and the cooling liquid conducts heat dissipation on the surface of the power generator.

The invention provides a marine ranch breeding and zero-carbon comprehensive energy system based on marine energy. The marine ranch breeding and zero-carbon comprehensive energy system specifically comprises a floating platform module, a marine ranch module, a marine renewable energy power module, a wind power-hydrogen ammonia conversion module, an intelligent control module, a marine transportation system and a consumption terminal. Functional fusion of offshore energy and marine ranching is achieved, the sea area intensive utilization rate, the sea area resource development efficiency and the marine resource development technology level are effectively improved through the wind-fishery-hydrogen-ammonia fusion development mode, the marine resource development cost is effectively reduced, advantage complementation is formed, commercial state fusion is achieved, and the development cost is reduced. And the intelligent control module can realize energy collaboration of the offshore energy, so that the utilization rate of the power generation output power of the offshore renewable energy power module is improved while the operation of the power grid is stabilized, and the wind power-hydrogen ammonia conversion efficiency is improved.

The invention discloses a high-tower wind turbine generator fault early warning and diagnosis method and system. The method comprises the following steps: preprocessing SCADA data of the high-tower wind turbine generator; decomposing the preprocessed SCADA data through an improved EEMD algorithm, extracting feature information of at least two time scales, and splicing I MF components of at least two time points into a feature matrix; inputting the feature matrix into an enhanced vision Transformer (Vi T) model to obtain a prediction result of the real-time state of the wind turbine generator; and calculating a residual matrix based on the prediction result and the SCADA data, and when a root mean square error of the residual matrix exceeds a preset early warning threshold, triggering fault early warning. According to the technical scheme, by improving the EEMD algorithm and enhancing the visual Transform model, the accuracy and real-time performance of fault early warning and diagnosis of the high-tower wind turbine generator system are improved, the intelligent level of the system is enhanced, and the operation and maintenance cost is reduced.

The invention relates to the technical field of wind power generation, in particular to a forward and reverse rotation double-rotor multi-blade wind generating set, and aims to overcome the defects of low wind energy utilization rate and unstable power generation reliability caused by inconvenience in angle adjustment of blades in the prior art, the following scheme is provided: the forward and reverse rotation double-rotor multi-blade wind generating set comprises a base; the number of the fixing legs is four, and the four fixing legs are all fixedly installed at the bottom of the base; the turntable is rotatably mounted at the top of the base, a first mounting box is fixedly mounted at the top of the base, and a first stepping motor is fixedly mounted on the inner wall of the first mounting box; and the number of the supporting columns is two, the two supporting columns are both fixedly installed on the top of the rotating disc, first rotating shafts are both rotatably installed on the two supporting columns, and the angle of the blades can be conveniently adjusted, so that the wind energy utilization rate can be further increased, and the power generation reliability can be further improved.

The invention discloses a mooring type floating wind power generation device, and belongs to the technical field of wind power generation. The device comprises a first bag body, the peripheral surface of the first bag body is a rotary surface, and the diameter of the first bag body is gradually increased from front to back; the peripheral surface of the second capsule body is a rotary surface, the diameter of the second capsule body is gradually reduced from front to back, the second capsule body is arranged on the rear side of the first capsule body at intervals, and a crack is formed between the second capsule body and the first capsule body; the first ring wing sleeves the radial outer side of the crack; the radial outer side of the second bag body is sleeved with the second ring wing; and the contra-rotating fan blades comprise two fan blades with opposite rotating directions, each fan blade comprises a hub and a blade body connected to the hub, the hubs are located in the cracks, and at least part of the fan blades are located outside the cracks in the radial direction and located in the area defined by the first ring wings. According to the mooring type floating wind power generation device, the aerial high-density wind energy capturing capacity is considered, and meanwhile the aerodynamics and the aerial floating capacity of the aerostat are enhanced.

Disclosed is a marine fuel cell-based integrated heat, electricity, and cooling supply system comprising a power supply system and a waste heat recovery system; the power supply system comprises wind turbine generator sets, solar generator sets, and a fuel cell power module; the waste heat recovery system encompasses a turbine power generation module and a lithium bromide refrigeration module; the fuel cell power module is connected to both the turbine power generation module and the lithium bromide refrigeration module; the turbine power generation module is used to generate electricity using waste heat. This approach fully exploits the waste heat from the exhaust gas generated by the fuel cell power module, resulting in a high overall energy utilization rate. The self-consumption electricity and pure hydrogen fuel for the integrated energy supply system can be obtained from solar and wind energy, ensuring low carbon emissions for the entire system.

The invention discloses a wind power generation device with a heat dissipation mechanism, and relates to the technical field of renewable energy sources, the wind power generation device comprises a box body, a power generator is arranged in the box body, a gear box is arranged on the inner wall of the box body, after fan blades are driven by wind power, the power generator converts high-speed rotating mechanical energy transmitted by the gear box into electric energy, and the electric energy is transmitted to the heat dissipation mechanism. The heat dissipation nets need to be cleaned after being used for a long time, manual cleaning work cannot be carried out under the severe weather condition, the heat dissipation nets are possibly not cleaned in time, normal operation of the wind power generation device is affected, the heat dissipation nets are cleaned through the scraper blades through wind power, and the heat dissipation efficiency of the three heat dissipation nets is further improved. After the scraping plate is used for a long time, a large number of impurities can be attached to the surface of the brush, the brush can vibrate through striking of the striking rod, and therefore dust and the impurities on the brush are shaken off and prevented from polluting the heat dissipation net again.

The invention relates to an electrolytic hydrogen production and fuel cell waste heat gradient utilization system and method based on an organic Rankine cycle, and belongs to the field of new energy. The system comprises a wind power generation unit, a photovoltaic power generation unit, a storage battery energy storage system, an electrolytic hydrogen production device, a hydrogen storage system, a fuel cell power generation unit, a waste heat utilization unit and an organic Rankine cycle device, and can be used for realizing multi-element consumption and gradient utilization of renewable energy sources. The method specifically comprises the following steps: establishing equipment models in a system, wherein an electrolytic bath considers five states of shutdown, cold start, standby, hot start and standby; on the basis of a mixed integer linear programming method, operation constraints of all equipment, renewable energy output prediction and electricity, heat and hydrogen load requirements are integrated, an optimization scheduling model meeting the electricity, heat and hydrogen load requirements and economical efficiency of the system is constructed, output of all the equipment is coordinated, and finally the optimization targets of maximizing the economical efficiency of the system and meeting the electricity, heat and hydrogen load requirements of the system are achieved.

The invention discloses a wind power generation device and system, and the device comprises a main bag body which extends in the front-back direction, and the peripheral surface of the main bag body is a rotary surface; the annular wing is arranged on the radial outer side of the main bag body in a sleeving mode, the annular wing and the main bag body are spaced, and an airflow channel is formed between the inner wall of the annular wing and the outer wall of the main bag body; the airflow channel is divided into a plurality of air channels through components, the air channels are arranged in the circumferential direction of the main bag body, and fan blades are arranged in at least part of the air channels. By means of the coaxial layout of the main bag body and the annular wing and the combination of division of an airflow channel by a component, efficient capture and energy conversion of wind energy are achieved. Compared with a traditional floating power generation device, the wind sweeping area of the fan blades can be remarkably reduced under the same power generation power, the economical efficiency of the wind power generation device is improved, and the technical feasibility of stepping towards a higher altitude and a higher wind energy density area is achieved.

Systems, method, and computer readable medium are provided for a controller for a generator. The system includes a rectifier for converting a first AC signal generated by the generator to a first DC signal; a first DC-DC associated with energy storage and a first mode; a second DC-DC associated with an inverter and a second mode; a switch for alternately toggling between the first DC-DC and the second DC-DC, wherein the first mode prevents output to the electrical grid, and the second mode enables inversion of the second DC signal to a second AC signal via the inverter; and a processor that uses the indicator to operate the switch to operate the generator in the first mode when a connection to the grid does not conform with a parameter, and operate the generator in the second mode when the connection to the grid conforms with the parameter.

The invention discloses a hybrid power generation device with built-in swing type wave energy in a floating fan platform, and belongs to the technical field of offshore wind power generation. Comprising a semi-submerged platform, the semi-submerged platform comprises a plurality of buoys, connecting rods and mounting rods, bases are arranged at the bottoms of the buoys, the buoys are divided into upper buoys and lower buoys, wave energy devices are arranged in the buoys, a wind driven generator is arranged on the top face of the semi-submerged platform, and the buoys are connected through the slope connecting rods; and the mounting rod is connected with the buoy through a middle connecting rod and an inclined supporting rod. By the adoption of the structure, the semi-submersible platform arranged on the sea surface unstably floats along with the sea surface, and by means of up-down displacement caused by unstable floating, the swing rod in the internal wave energy device drives the hydraulic cylinder to move up and down so as to generate electricity; the inertia device is arranged for power generation, the floating displacement amount of the semi-submersible platform can be absorbed, and then the problem that the offshore wind turbine is low in power generation stability and safety is solved.

The invention discloses a method and device for restraining shaft system torsional vibration of a net-forming type double-fed fan under the variable wind speed. The method comprises the steps that a mathematical model of the electromagnetic torque-rotating speed difference of the net-forming type double-fed fan is constructed; drawing an electromagnetic torque-rotating speed difference Bode diagram according to the mathematical model; according to the mechanical parameters of the wind turbine and the motor, the shafting natural oscillation frequency of the doubly-fed fan is calculated, and stability analysis is conducted on damping of the shafting natural oscillation frequency in combination with the Bode diagram; drawing a small-signal model block diagram according to the mathematical model; analyzing the small-signal model block diagram to obtain an analysis result that a current loop provides a coupling path for the rotating speed and the active power; according to a stability analysis result and an analysis result of the small-signal model block diagram, negative damping brought by an operation area is weakened by reducing current loop bandwidth, so that the risk of torsional vibration of the shaft system is reduced.

The invention provides a blade damage monitoring method and system for a wind generating set. The method comprises the steps that acoustic emission signals of acoustic emission sensors on all blades are obtained; performing feature analysis on the acoustic emission signals to obtain feature values of each blade on a plurality of acoustic emission features; for each acoustic emission feature, analyzing the distribution difference among the feature values of the plurality of blades to obtain the difference degree corresponding to each acoustic emission feature; and determining that at least one blade in the plurality of blades has a damage risk in response to the condition that the difference degree of the plurality of acoustic emission characteristics meets a preset difference condition. The problem that the blade damage is difficult to accurately monitor is solved, the damage risk of the blade can be comprehensively analyzed by considering the multiple acoustic emission characteristics and comparing the characteristic value distribution between the blades, and therefore a more accurate damage monitoring result is provided.

The invention relates to the technical field of mariculture, and discloses mariculture equipment and an offshore wind power system.The mariculture equipment comprises a mounting frame, a net cage and a lifting assembly, a containing cavity is formed in the mounting frame, an opening is formed in the top of the mounting frame, the bottom of the mounting frame is suitable for being arranged in water, and the top of the mounting frame is exposed out of the water surface; one end of the lifting assembly is fixed to the mounting frame, the other end of the lifting assembly is connected with the net cage, and the lifting assembly has a first state for driving the top of the net cage to sink into the sea and a second state for driving the net cage to float out of the sea surface. The distance between the top of the net cage and the average sea level exceeds the maximum wave height, the impact of stormy waves on the net cage can be reduced, the net cage is prevented from being damaged, and after the typhoon is finished, the net cage is driven to restore the original position through the lifting assembly and lifted to the second state of floating out of the water surface through the lifting assembly so that the net cage can be maintained conveniently.

A dynamo-electric rotary machine includes a rotor defining an axis, a stator, and a can designed for arrangement in an air gap between the rotor and the stator in order to seal the stator and the rotor in relation to each other. The can has at least one section of average electrical conductivity in a range from 1 S / m to 10000 S / m in an axial and / or a tangential direction. The can is electrically conductively incorporated in an earthing system of the dynamo-electric machine.

The invention relates to the technical field of livestock and poultry transport vehicles, in particular to a livestock and poultry transport vehicle with a lifting structure. Comprising a carriage which is provided with a lifting structure; the air inlet pipe is communicated with the carriage, and a mounting frame is fixedly connected into the air inlet pipe; the rotating shell is rotationally connected to the mounting frame, and the compartment is provided with a power generation device which is in transmission fit with the rotating shell; and the multiple blades all penetrate through the rotating shell and are rotationally connected to the rotating shell. The air inlet pipe is arranged on the carriage, airflow enters the carriage when the transport vehicle runs, so that the interior of the carriage is cooled, the angles of the blades are adjusted according to the temperature in the carriage, the situation that the airflow speed is too high when the air temperature is low, and then the temperature in the carriage is too low is avoided; meanwhile, by arranging the power generation device, wind current drives the rotating shell to rotate through the blades, so that the rotating shell drives the power generation device to generate power.

The invention provides a double-blade breeze generator which comprises a machine frame, an inner impeller and an outer impeller, the inner impeller and the outer impeller are arranged on the machine frame, and the inner impeller comprises a rotating shaft and a plurality of inner spiral blades arranged on the rotating shaft. The outer impeller comprises two shaft sleeves, a plurality of outer spiral blades connected between the two shaft sleeves and air ducts arranged on the outer diameters of the outer spiral blades, and the inner spiral blades and the outer spiral blades are in positive and negative spiral shapes; the inner impeller and the outer impeller are of a coaxial sleeving structure, namely, a containing cavity is formed in the center of the outer spiral blade, the two ends of a rotating shaft of the inner impeller are inserted into the two shaft sleeves respectively, and the inner spiral blade is located in the containing cavity. The rotating outer diameter of the inner spiral blade is smaller than the rotating inner diameter of the outer spiral blade. According to the double-blade breeze generator of the structure, through interaction of the inner impeller and the outer impeller, the rotating speed of the inner impeller is increased in a geometric level, and therefore the power generation efficiency is greatly improved.

The invention provides a control method and device for a variable pitch system of an offshore wind turbine generator, and relates to the technical field of offshore power generation. The method comprises the following steps: acquiring real-time related data corresponding to an offshore wind turbine generator, wherein the real-time related data at least comprises wind speed data, wind direction data and pitch angle data; processing the real-time related data to obtain a control instruction of a variable pitch system of the offshore wind turbine generator; the control instruction is sent to a driving unit corresponding to the variable pitch system; and blade variable-pitch control is executed on the variable-pitch system based on the driving unit. According to the method, the pitch angle is adjusted by collecting data in real time and combining with the control algorithm, so that the fan can keep optimal power output when running at different wind speeds and wind directions, and the power generation efficiency of the fan is improved; the precise control of the variable pitch system can effectively avoid the overload or overspeed of the fan.

A bearing arrangement includes a first anti-friction bearing including an inner ring and an outer ring, a second anti-friction bearing including an inner ring and an outer ring, a first spacer element seated between the inner ring of the first anti-friction bearing and the inner ring of the second anti-friction bearing and including an oil supply channel which runs in a radial direction, and a second spacer element arranged between outer ring of the first anti-friction bearing and the outer ring of the second anti-friction bearing for adjusting a bearing prestress. The second spacer element includes at least two curved pieces which are placed circumferentially in opposition to one another. The second spacer element extends in the radial direction such as to from a radial gap to the first spacer element and includes an oil supply channel which runs in the radial direction.

Provided in the present application are a multi-electrolytic-cell series-parallel hydrogen production control method and a power generation system. The method in the present application comprises: acquiring electrolysis power parameters of a plurality of electrolytic cells and a real-time generation power of a power generation system; and then, on the basis of the plurality of electrolysis power parameters and the real-time generation power, controlling the plurality of electrolytic cells to sequentially and repeatedly execute electrolysis start-stop operations, wherein each electrolysis start-stop operation comprises: comparing the magnitude of a target round startup output power with the magnitude of a rated minimum electrolysis power of a target electrolytic cell; on the basis of a corresponding magnitude determination, performing subsequent control operations; and then in the subsequent control operations, performing a corresponding control operation by means of determining whether the target round startup output power exceeds a danger warning threshold power. Thus, the hydrogen production efficiency and flexibility of the plurality of electrolytic cells in the hydrogen production power generation system are improved, the stability of the hydrogen production power generation system is improved, and the service life of the hydrogen production power generation system is prolonged.