92 results about "Flywheel energy storage" patented technology

The invention provides an axial magnetic flux motor convenient for generating a flywheel energy storage device and an assembling method thereof, the axial magnetic flux motor comprises a shell, a rotating shaft, a plurality of rotors and at least one stator disc, the shell comprises an upper cover, a lower cover, end cylinders arranged at two axial ends respectively and a middle cylinder arranged between adjacent stator discs, the rotating shaft is arranged along the axial direction, and the rotating shaft is arranged along the axial direction. The upper cover and the lower cover are arranged in the shell and rotationally connected to the shell through bearings arranged at the positions of the upper cover and the lower cover, the multiple rotors are arranged in the axis direction of the rotating shaft at intervals and fixed to the rotating shaft in the circumferential direction, a gap used for containing the stator disc is formed between every two adjacent rotors, and the peripheral edge of the stator disc is clamped between every two adjacent barrels; according to the axial magnetic flux motor, the problems that in the prior art, an axial magnetic flux motor is difficult to assemble, sealing is complex, heat dissipation is limited, and light weight is insufficient are solved.

The swing-arm double-gear power transmission mechanism is a type of engine that eliminates the crankshaft structure of the traditional cylinder piston connecting rod crankshaft engine, replacing it with a swing-arm double-gear power transmission mechanism. This mechanism consists of a straight rod fixed to the piston, a U-shaped gear carrier fixed to the straight rod, and two fork plates under the U-shaped gear carrier, each with a long, narrow opening in the middle. At the rear end of each fork plate, there is also a shaft hole. Between the two fork plates of the U-shaped gear carrier, a pair of meshing gears are installed. A connecting plate is installed on each side of the gears, and each connecting plate has a shaft hole corresponding to the gear shaft position, allowing for sliding fit with the gear shaft or a rolling bearing fit. After passing through the connecting plates, both ends of the gear shaft are fixed to a pair of swing arms. The other end of the upper gear's swing arm is fixed to the power output main shaft and the flywheel energy storage sub-shaft, respectively. The lower gear's swing arm... At the other end, it engages with the shaft holes or rolling bearings on the two fork plates of the U-shaped gear carrier. Driven by the engine starter, the main shaft transmits rotation to the upper gear of this structure, which in turn transmits it to the meshing lower gear. This, in turn, drives the U-shaped gear carrier to move along the direction of the cylinder piston, preparing the engine for the four-stroke power stroke. When the engine ignites and begins the power stroke, the piston drives the U-shaped gear carrier, and through the initial operating mode, the gear set, in turn, pushes the main shaft to continue rotating in the direction it began to rotate, performing power. At the end of the power stroke, the flywheel releases its stored energy, continuing to complete the other strokes of the engine, forming a continuous cycle of power delivery. Because of this continuous cycle, the main shaft continuously outputs power, eliminating all the defects of traditional crankshaft engines. This swing arm double-gear power transmission mechanism has an extremely simple structure, reliable operation, is very easy to manufacture, process, install, and maintain, has low cost, and extremely high thermal efficiency. It is suitable for all applications and equipment using traditional cylinder piston crankshaft engines.

The application discloses a flywheel energy storage-based active quick-response frequency stabilization method and system for an isolated network, and relates to the field of power grid control.The method comprises the following steps: collecting a frequency signal of an isolated power grid in real time, fitting the frequency signal, and obtaining a smooth frequency value and a frequency change rate; when the absolute value of the frequency change rate exceeds a dynamic starting threshold, acquiring frequency deviation time series data of a preset time length to generate a disturbance event analysis window; extracting a frequency deviation signal in the disturbance event analysis window, performing time-frequency conversion on the frequency deviation signal, and generating a time-frequency spectrum diagram; based on the time-frequency spectrum diagram, decomposing the frequency deviation signal into a fundamental component and at least one overtone component, extracting a morphological feature parameter, and generating a disturbance image; setting a target state and a constraint condition of frequency recovery according to the disturbance image, determining a frequency recovery trajectory; and based on the frequency recovery trajectory, cyclically executing a control strategy until the power grid frequency is stabilized in a preset frequency range.

The utility model discloses a novel mill kinetic energy recovery device relates to kinetic energy recovery technical field, the utility model discloses a flywheel energy storage mechanism and stepless speed changer, flywheel energy storage mechanism includes vacuum chamber, and the vacuum chamber is equipped with the rotor and two stators of forming axial flux, and the rotor includes the mandrel, and the mandrel is integrally connected with the flywheel, and the flywheel both sides edge all are fixed with permanent magnet, and two stators symmetrical setting are in the permanent magnet outside of flywheel both sides. The utility model discloses a flywheel and permanent magnet combination instead of motor rotor, and can constitute axial flux's permanent magnet motor with two stators cooperation, compared with the combination of the flywheel and motor, both need not the shaft coupling connection, and have the advantage that compactness is stronger, response speed promotion and efficiency promotion, is applicable to the use under the rolling mill environment, through the flywheel and recycles the kinetic energy of the idle running of rolling mill to utilize, can reduce the waste of rolling mill cost, realizes the purpose of reducing cost and increasing benefit.

The application discloses a permanent magnet flywheel energy storage phase modifier system and a control method thereof. The permanent magnet flywheel energy storage phase modifier system comprises a controller, a converter, a flywheel, a permanent magnet speed regulating motor, a phase modifier and a shaft system. The phase modifier and the permanent magnet speed regulating motor are mounted on a power grid. The controller is used for acquiring the flywheel rotating speed, the active power and the frequency of the power grid, formulating an active power control strategy and sending a control signal. The flywheel and the phase modifier rotor are connected with the permanent magnet rotor and the armature rotor of the permanent magnet speed regulating motor through the shaft system. The converter is connected with the armature winding of the permanent magnet speed regulating motor and changes the power frequency according to the control instruction of the controller. The converter adjusts the rotating speed of the permanent magnet synchronous motor and the flywheel by changing the power frequency, so as to change the flywheel energy storage state. The energy is fed through the phase modifier and the permanent magnet speed regulating motor. The application can actively control the distribution process of the flywheel energy charging and discharging and the active power sending, and improves the inertia support capacity of the phase modifier.

This invention discloses a molten salt pump with a bearing cooling system, belonging to the technical field of high-temperature molten salt pumps. It includes: a pump body, a pump shaft, a frame, a bearing housing, a cooling device, and a support frame. The pump body is mounted on the frame; the frame is mounted on the top of the pump body, and the bearing housing is mounted within the frame. The pump shaft is rotatably connected to the bearing housing via bearings. The cooling device is installed inside the bearing housing, with multiple microchannel coils respectively fitted onto the outer surface of the bearing. A flywheel energy storage device is installed inside the bearing housing, driving ambient air to enter through the air inlet and generating a forced airflow that blows across the cooling end of the cooling device for heat exchange. The cooling end of the cooling device is connected to a cold air inlet pipe, which is connected to multiple microchannel coils, and all microchannel coils are connected to an outlet pipe. An outlet is provided at the bottom of the bearing housing, and the outlet pipe is connected to the outlet. This invention miniaturizes and integrates a compressor-free cooling device into the bearing housing for active phase change cooling, extending the lifespan of the molten salt pump.

A kind of wind farm multi-objective coordinated frequency optimization method and device containing flywheel energy storage, the method includes: according to the frequency characteristic requirement of power system, obtain wind storage frequency modulation power;With wind storage frequency modulation power error minimum and wind storage instability risk minimum as objective function, wind turbine speed, flywheel energy storage state of charge and the rated active power of wind turbine, flywheel energy storage respectively as constraint condition, establish multi-objective optimization model;Obtain wind storage state factor and frequency state factor, and obtain adaptive weight coefficient by fuzzy algorithm, the objective function is normalized processing, and then the multi-objective optimization model is converted into single objective optimization model;Solving single objective optimization model, obtain the optimal frequency modulation power of wind turbine and flywheel energy storage;The device includes data acquisition unit, multi-objective optimization model establishment unit, single objective optimization model conversion unit and solving unit.The present application can improve the operation stability when wind storage participates in system frequency response.

This invention discloses an energy data equalization method and system for flywheel energy storage arrays, relating to the field of flywheel energy storage technology. The method involves acquiring operating parameters of each flywheel unit, including information indicating energy reserves, heat load, and accumulated operating stress. Based on these parameters, the method assesses the current operational capacity of each flywheel unit, obtaining an operational capacity assessment result. Based on the assessment result, a differentiated energy task is determined for each flywheel unit. This differentiated energy task is then sent to each flywheel unit, and each unit adjusts its energy conversion operation according to the task, cyclically executing the acquisition, assessment, determination, and adjustment operations. This effectively avoids premature unit aging and system performance degradation caused by uneven load distribution, thereby improving the overall system lifespan, reducing maintenance costs, and enhancing overall energy efficiency.

This invention discloses a flywheel energy storage adaptive optimization power allocation method and system based on mode decomposition. The method acquires grid AGC commands in real time through a sliding time window and decomposes the commands into IMF components at different time scales using the CEEMDAN method. Then, it dynamically determines the reconfiguration order based on the maximum ramp rate of the thermal power unit, allocating high-frequency components to the flywheel energy storage and low-frequency components to the thermal power unit. The power allocation commands are periodically updated through rolling optimization. This invention addresses the problem of slow frequency regulation response and insufficient regulation accuracy of traditional thermal power in grids with a high proportion of renewable energy, due to increased uncontrollability on the power source side. By compensating for the inertial delay of thermal power units with the fast response characteristics of flywheel energy storage, it achieves adaptive optimization allocation of frequency regulation power, thereby significantly improving the joint frequency regulation response speed and quality. Simultaneously, it reduces the frequent operation of thermal power units, lowers equipment wear, and extends their service life.

This invention relates to the field of flywheel energy storage technology, specifically disclosing a flywheel energy storage system and its energy storage method for high-voltage direct-connection scenarios. The flywheel energy storage system for high-voltage direct-connection scenarios includes: multiple series-connected flywheel energy storage sub-modules, which form a cascaded H-bridge topology for connection to a high-voltage AC power grid. Each flywheel energy storage sub-module includes a flywheel energy storage unit, a generator-side converter, and a power module. The AC side of the power module is connected in series to the high-voltage AC power grid, and the DC side of the power module is connected to the DC side of the generator-side converter, used to adjust the output voltage of the generator-side converter by adjusting its on / off state. The AC side of the generator-side converter is connected to the flywheel energy storage unit, used to perform bidirectional AC-DC conversion. This invention reduces the footprint and maintenance costs of flywheel energy storage systems for high-voltage direct-connection scenarios, while ensuring the reliability of the flywheel energy storage system for high-voltage direct-connection scenarios.

The present invention relates generally to working machines with working units that are subject to fluctuating loads or have fluctuating power consumption. The invention relates, on the one hand, to a drive train assembly for driving such a working unit with fluctuating power consumption from a power source, comprising a drive unit transmission that converts a drive movement of the power source into a working movement of the working unit and is connected to the working unit via a transmission output element and to the power source via a transmission input element, as well as a flywheel energy storage device for dampening load shocks or fluctuations. On the other hand, the invention also relates to the working machine with a drive unit with fluctuating power consumption and the aforementioned drive train assembly with flywheel energy storage device.It is proposed to connect the flywheel energy storage system to the drive train section leading from the drive unit to the driven working unit via a branching flywheel train at various points of engagement, so that the flywheel moments are split and the loads are distributed across different points of engagement, thus avoiding overloads and premature wear at a single point of engagement and also significantly reducing the size of the system through load distribution.

The application discloses a kind of motor stator cooling components of magnetic suspension flywheel energy storage equipment, belong to magnetic suspension flywheel energy storage equipment technical field, including stator core, the outer wall side end of stator core is equipped with cooling jacket for heat dissipation, stator core and cooling jacket are provided with sealing assembly between upper and lower sides, the inside of cooling jacket is provided with the heat dissipation mechanism for the heat dissipation of stator core, in the application, by setting several guide vanes or annular inclined guide vanes in the annular cooling cavity of cooling jacket, the annular cooling cavity is divided into several independent cooling flow channels, and simultaneously, cooling liquid is evenly distributed into each cooling flow channel by shunt pipe group, so that the cooling liquid can flow uniformly along the cooling flow channel, avoiding the occurrence of local flow dead angle, effectively solve the problem of uneven temperature distribution of each part of stator core existing in the prior art cooling component, to prevent the occurrence of local overheating phenomenon.

This invention discloses a flywheel-battery hybrid energy storage method and system for suppressing grid power oscillations, relating to the field of power system stability control technology. It includes: acquiring the real-time rotor speed of the flywheel energy storage unit; generating a first power command based on the deviation from a preset rated speed; determining whether the real-time rotor speed is within a preset speed range; if it exceeds the limit, generating a second power command to control the battery energy storage unit to charge and discharge at a constant power; if it is within the range, generating a third power command based on the DC bus voltage deviation; and controlling the battery to execute the commands based on priority arbitration logic, with the second power command having higher priority than the third power command. This invention addresses the problems of existing centralized control architectures heavily relying on complex communication, experiencing response delays, and batteries suffering from shallow charging and discharging and rapidly declining lifespan due to frequent tracking of power oscillations.

This application discloses a flywheel energy storage device and its installation method, relating to the field of energy storage equipment technology. The device includes a housing, a rotating shaft, and multiple rotors. The rotating shaft is rotatably connected inside the housing. The multiple rotors are sequentially installed on the rotating shaft along its axial direction and are circumferentially fixed to it. A receiving gap is provided between adjacent rotors. The housing includes an upper cover, a lower cover, and multiple cylindrical bodies disposed between them. The multiple cylindrical bodies are segmented along the axial direction. A stator is clamped and sealed between adjacent cylindrical bodies. The outer side of the stator is open to the atmosphere, and the inner side of the stator extends into the corresponding receiving gap. Permanent magnets are fixed on the rotors, and the permanent magnets are correspondingly arranged with the coil bodies on the stator. This solution can solve the problems of poor vacuum sealing and low assembly efficiency in the prior art.

This application provides a variable parameter frequency regulation method, apparatus, and electronic device, relating to the field of power system technology. The method includes: acquiring the load power change of a doubly-fed induction generator (DFIG) with a flywheel energy storage unit; obtaining real-time parameter optimization constraints based on the load power change, a time-delay frequency response model, preset frequency constraints, the expression for the minimum frequency point, and the steady-state frequency expression; the time-delay frequency response model characterizes the time-delay dynamic relationship between the frequency change and the load power change within the DFIG with a flywheel energy storage unit; obtaining a target droop coefficient and a target inertia coefficient that meet the real-time parameter optimization constraints through iterative calculation; and sending the target inertia coefficient and target droop coefficient to the DFIG with a flywheel energy storage unit, so that the DFIG with a flywheel energy storage unit determines a compensation power value based on the target inertia coefficient and target droop coefficient, and adjusts the power according to the compensation power value. This achieves safe and rapid primary frequency regulation with variable parameter optimization control.

The utility model belongs to the field of power generation and energy storage control technology, specifically discloses a kind of compressed air energy storage power station system of integrated flywheel energy storage. Including control architecture and power architecture: control architecture includes the coordination controller for regulating and controlling multiple energy storage devices, coordination controller is connected with compressor control system, flywheel energy storage system and distributed control system communication respectively, and distributed control system is connected with turbine electro-hydraulic regulating module communication;Power architecture includes the armature of flywheel energy storage system in turn through power conversion system, energy storage transformer is connected to the storage / release energy loop of compressed air energy storage power station main transformer low voltage side, and the station electricity loop of the power inlet of connecting energy storage transformer low voltage side and control architecture. Solve the single compressed air energy storage response speed slower, and single flywheel energy storage although response speed is fast, but the technical problem of limited energy storage capacity. Suitable for compressed air energy storage power station to promote use in grid source / demand balance regulation and control project.

This invention provides a control method, apparatus, equipment, and system for a hybrid energy storage power station, relating to the field of energy storage control technology. The method includes: acquiring the grid connection point frequency between the hybrid energy storage power station and the power grid system; determining the required inertia support power and primary frequency regulation power of the power grid system based on the grid connection point frequency; determining the flywheel power of the flywheel energy storage device and the battery power of the battery energy storage device based on the inertia support power and the primary frequency regulation power, so as to control the operation of the flywheel energy storage device and the battery energy storage device; wherein, the flywheel power includes the inertia support power and a first frequency regulation power component dynamically allocated to the flywheel energy storage; the battery power includes a second frequency regulation power component dynamically allocated to the battery energy storage; the sum of the first and second frequency regulation power components is the primary frequency regulation power. This invention can accurately adapt to the support requirements of the power grid system, further improving frequency stability.

This invention provides a heat dissipation system for a flywheel energy storage device. The heat dissipation system includes: a housing mounted on top of a support base via a support frame; multiple heat dissipation frames installed inside the housing; multiple first heat dissipation bases mounted on the outer surface of each heat dissipation frame; a first connecting ring mounted on the top of each first heat dissipation base; a flow pipe mounted on the outer surface of the first connecting ring; a fixing pipe fixedly connected to the bottom of each heat dissipation frame; a second connecting ring fixedly connected to the bottom end of each fixing pipe; multiple mounting ports on the top of the housing; multiple through holes on the bottom of the inner wall of the housing; and a flywheel rotor installed inside the housing. The heat dissipation system for the flywheel energy storage device provided by this invention, through its design using internal liquid flow in conjunction with the heat dissipation frames inside the housing, improves the heat dissipation effect and enhances the stability of heat dissipation during long-term operation of the flywheel energy storage device.

The application discloses a flywheel energy storage device with a composite supporting structure and belongs to the technical field of flywheel energy storage devices. The flywheel energy storage device comprises a second support which is installed on one side of a first support through bolts, and fixing cylinders are installed on the outer sides of the second support and the first support. Magnetic suspension bearings are installed in the fixing cylinders. Welding cylinders are installed at one end of the magnetic suspension bearings. The device can drive the connecting support to move through the installation of an electric telescopic rod, so that the connecting support drives the magnetic suspension bearings to move through the welding cylinders and the transmission supports, so that the device can adjust the distance between the two magnetic suspension bearings. The device is convenient for workers to use the actual operation of the flywheel main body to adjust the distance between the two magnetic suspension bearings, to carry out targeted adjustment, to ensure the stable rotation of the flywheel main body and to enhance the use effect of the device.

The utility model relates to the technical field of flywheel energy storage, and disclose a kind of flywheel energy storage device of electric power generation separation, including lower casing, the top of the lower casing is fixedly connected with upper casing, the top of the lower casing and the bottom of upper casing are all provided with through-hole;The flywheel energy storage device of electric power generation separation, solve the armature winding used in the electric state and the power generation state in the prior art is same, i. e. motor stator armature winding, bidirectional energy transfer is carried out;The energy storage capacity of flywheel energy storage device mainly depends on the size and rotational speed of flywheel rotor, and its charge-discharge power depends on the power of motor, if the power of motor cannot be improved due to volume, cost and other factors, it directly limits the charge-discharge power of flywheel energy storage device this important index, and also cannot play its important advantage well in some application scenarios requiring instantaneous high-power discharge.

The application provides a sealing locking mechanism of a flywheel energy storage unit, which comprises a lower shell and an upper cover body, a shaft body is rotationally arranged between the lower shell and the upper cover body, the lower shell has a first cavity inside, a flywheel body is fixedly sleeved on the surface of the shaft body, the flywheel body is located in the first cavity, and a plurality of clamping assemblies, a plurality of clamping assemblies and a plurality of locking assemblies are further included. In the process of installing the flywheel energy storage unit, the clamping assembly clamps the flywheel body, the linkage locking assembly tightens the upper cover body, the clamping assembly is arranged in the lower shell, the clamping assembly does not need to be installed and removed, the clamping of the flywheel body can be realized in the process of installing the upper cover body and the lower shell, and the flywheel energy storage unit can be restored to work after being moved to the position, so that the operation process is simplified.

The utility model discloses a tamping mechanism, including horizontal shift axle, movable guide frame is equipped below the horizontal shift axle, movable lifting seat is equipped in the guide frame, the both sides of guide frame are equipped with the pivot seat that is connected with lifting seat, the lower part of pivot seat is connected with swing seat through pivot respectively, the both ends of swing seat are connected with the deflection tamping picket seat of can, the below of tamping picket seat is equipped with a plurality of tamping picket, still be equipped with the flywheel energy storage subassembly on pivot seat, the flywheel energy storage subassembly is connected swing seat through clamping subassembly. This tamping mechanism preserves the operation function and the premise of quality of large -scale tamping equipment, simplifies the structure, and optimizes the space layout, makes it can be compatible with the use of small -size tamping equipment when railway construction, not only can realize turnout and line tamping operation, improves the operation efficiency and tamping quality, also can adapt to the narrow space, expands the operation range as far as possible.

This invention discloses a motor, a control method for the motor, and a flywheel energy storage device. The motor includes a rotor and a vibration damping assembly. The vibration damping assembly includes a magnetic levitation assembly and a vibration damping element. The magnetic levitation assembly is sleeved on the outside of the rotor, and the vibration damping element is sleeved on the outside of the magnetic levitation assembly. In the radial direction, the vibration damping element and the magnetic levitation assembly are spaced apart. When the radial amplitude of the rotor exceeds a preset value, the magnetic levitation assembly moves towards the vibration damping element, and the magnetic levitation assembly is coupled to the vibration damping element. This reduces the load on the magnetic levitation system while ensuring normal motor operation, converting additional vibration into heat through the vibration damping element for release, thus extending the service life of the magnetic levitation assembly.

The present application relates to the technical field of energy storage, in particular to a network-constructed double-fed flywheel energy storage unit control loop starting and grid-connection method and system, the method comprising: starting a grid-side converter, including pre-charging a DC capacitor, and starting the grid-side converter control loop in turn according to a preset timing sequence: first starting a phase-locked loop, then starting a current loop, and finally synchronously starting a DC voltage loop and a reactive power loop; three-phase short-circuiting a double-fed motor stator, starting the flywheel and accelerating to a set speed by using a machine-side converter phase-locked loop and a network-constructed current control loop; opening the double-fed motor stator, starting the machine-side network-constructed control loop according to the timing sequence, and connecting to an AC power grid. Through the method and system, the flywheel can be directly started under network-constructed control and connected to the power grid, which is suitable for operation under weak power grid conditions and is more conducive to stable operation of the system.

This invention discloses a method for suppressing power fluctuations in wind turbines based on flywheel energy storage. The method includes collecting multi-source data from the wind turbine and flywheel energy storage system, and after noise reduction and outlier removal, constructing an LSTM short-term wind condition prediction model. Simultaneously, it combines the turbine's power curve to generate a theoretical output power sequence, providing a precise baseline for subsequent fluctuation analysis and control. Based on this, the invention generates future wind speed predictions by constructing the short-term wind condition prediction model, calculates the theoretical output power by combining it with the wind turbine's power curve, and uses this theoretical power as a target reference for flywheel energy storage control. This achieves a dynamic correlation between wind condition prediction and energy storage control strategies, avoiding passive adjustment based solely on real-time power deviations. It achieves a shift from passive response to proactive prediction, improving the timeliness of power fluctuation suppression.

This invention discloses a multi-parameter fusion monitoring and early warning system and control device for flywheel energy storage devices. The system includes a workbench, a flywheel energy storage component, a vacuum chamber, and a data processing module. The vacuum chamber creates a vacuum operating environment for the energy storage component, which converts energy through bearing housings, shafts, and flywheel rotors. The data processing module integrates core units such as a data processor. The system uses multiple sensors, including photoelectric encoders and triaxial accelerometers, to synchronously monitor multi-dimensional parameters such as rotational speed, vibration, vacuum level, voltage, and current. Data preprocessing and deep learning fusion analysis improve the accuracy of anomaly detection. Combined with a graded early warning unit, it achieves on-site audible and visual graded early warning, and with a wireless information module, it completes remote early warning. This solves the problems of existing systems such as single monitoring, weak fusion analysis, and delayed early warning, providing comprehensive data support and early warning guarantee for the safe and stable operation of flywheel energy storage devices.

The present application belongs to the technical field of power system frequency modulation, and specifically provides a flywheel energy storage-fixed speed pumped storage collaborative frequency modulation system and a parameter optimization configuration method, which comprises a fixed speed pumped storage unit and a flywheel energy storage array system connected in parallel on the grid side, the flywheel energy storage array system is composed of a plurality of flywheel energy storage mechanisms connected in parallel, and the parameter optimization configuration method comprises: constructing a simulation model of the flywheel energy storage-fixed speed pumped storage collaborative frequency modulation system and determining a frequency modulation strategy; obtaining effect data of the flywheel energy storage-fixed speed pumped storage collaborative frequency modulation system participating in primary frequency modulation of the power grid through simulation test; establishing a constraint condition, taking the minimum flywheel energy storage array capacity as an objective function, optimizing the system, and selecting the theoretically optimal number of flywheels and the theoretically optimal power grid frequency disturbance threshold. The method reduces the construction cost of flywheel energy storage through flywheel-fixed speed pumped storage energy storage collaborative control and optimization configuration of flywheel energy storage capacity, and realizes the coordinated cooperation of flywheel energy storage and fixed speed pumped storage.

This invention relates to the field of hybrid energy storage system technology, specifically disclosing a control method, device, and storage medium for a grid-type hybrid energy storage system. The system includes a flywheel energy storage unit and an electrochemical energy storage unit, both connected to a DC bus, as well as a grid-side converter. During system startup, the control method controls the grid-side converter and flywheel energy storage unit to operate in constant voltage and constant speed modes, respectively, acquiring the grid frequency and determining and outputting the target active power based on this frequency. When the grid frequency crosses the frequency dead zone, the grid-side converter switches its operating mode, while simultaneously controlling the flywheel energy storage unit to switch its operating mode and the electrochemical energy storage unit's operating state based on the DC bus voltage changes. This invention allows for flexible adjustment of the flywheel energy storage unit's operating mode according to actual operating conditions, providing timely response when rapid support is needed, while also balancing efficient standby and millisecond-level support, making the system more intelligent and efficient, and reducing conversion losses.

The application discloses a kind of outer rotor magnetic suspension bearing's double-rotor large energy storage equipment magnetic suspension bearing, including base, double motor, elastic diaphragm coupling, radial magnetic bearing, electromagnetic loading assembly, outer rotor and inner rotor.Outer rotor is coaxially nested envelope in the outside of inner rotor, is made of carbon fiber composite material to promote energy storage inertia;Radial magnetic bearing realizes the non-contact support of double rotor by controlled electromagnetic force;Electromagnetic loading assembly is distributed in key stress position, for applying active load or vibration suppression force.Control system integrates electric eddy current sensor, uses interval control algorithm based on uncertainty quantification, parameter fluctuation is handled as bounded interval variable, dynamically calculates displacement envelope line and actively adjusts stiffness and damping, suppresses nonlinear vibration and prevents rub-impact.The application has the advantages of large energy storage density, strong anti-rubbing ability, high running stability, etc., can significantly improve the reliability and energy cycle efficiency of large flywheel energy storage equipment under extreme conditions.