25 results about "Flywheel energy storage system" patented technology

The invention provides a flywheel energy storage system with an electromagnetic coupler, which comprises a motor, a flywheel rotor, the electromagnetic coupler, a frequency converter and a generator, and is characterized in that the motor is connected with the flywheel rotor to drive the flywheel rotor to rotate, the electromagnetic coupler comprises an outer rotor and an inner rotor, and the outer rotor sleeves the inner rotor and is spaced from the inner rotor; the flywheel rotor is in transmission connection with the inner rotor, the inner rotor generates a rotating magnetic field to drive the outer rotor to rotate, and the frequency converter is connected with the outer rotor to change the current frequency of the outer rotor so as to change the magnetic field rotating speed matched with the current, so that the mechanical rotating speed of the outer rotor is kept constant. The generator generates power, accesses the power grid and inputs electric energy with stable frequency into the power grid, the requirement of power transmission to the power grid is met, power electronic devices are not needed, rotational inertia in the power grid can be improved, necessary voltage and frequency support is provided for the power grid, and the capacity of the power grid for efficiently accepting new energy is improved.

This invention provides a grid-connected control method for a flywheel energy storage system based on a dual-rotor brushless motor, belonging to the field of novel energy storage equipment and motor control technology. The control method includes: using the kinematic equation between the stator magnetic field speed, the speed of the adjusting magnetic ring rotor, and the speed of the permanent magnet rotor as the first constraint; using the synchronization of the adjusting magnetic ring rotor speed with the power grid as the second constraint; determining the stator magnetic field speed as the sole control degree of freedom for adjusting the operating state; performing boundary judgment and correction on the stator magnetic field speed; and adjusting the stator magnetic field speed to make the speed of the permanent magnet rotor and the speed of the flywheel change along a linear invariant trajectory determined by the first constraint, thereby realizing the flywheel energy storage system's control requirements for the power grid. This invention has a clear control structure and well-defined constraint relationships, enabling multiple grid-connected support functions while ensuring the safe operation of the flywheel.

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 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.

The application discloses a flywheel energy storage system and a thermal power unit frequency modulation system, and belongs to the technical field of energy storage and power system frequency modulation. The flywheel energy storage system comprises an energy interaction optimization module, a storage state intelligent regulation and control module, an operation safety monitoring module and an energy efficiency improvement optimization module. The energy interaction optimization module is used for adaptively matching the characteristics of intermittent power sources, adopting new power devices and setting virtual capacitor buffer logic. The storage state intelligent regulation and control module is used for dynamically adjusting the flywheel rotating speed, scheduling multiple flywheels and distributing the energy storage capacity. The operation safety monitoring module is used for collecting multiple parameters in real time, early warning faults through deep learning and triggering energy discharge. The energy efficiency improvement optimization module is used for establishing a loss model to compensate for losses, controlling heat dissipation in different regions and standby low-power consumption control. The flywheel energy storage system is high-efficiency, safe and economical, and is promoted to deeply cooperate with the thermal power unit, so that the response speed, control accuracy and economy of power grid frequency modulation are improved.

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.

A power grid primary frequency modulation control method, device and equipment and readable storage medium, relate to flywheel energy storage frequency modulation technical field, including if current time's power grid frequency deviation exceeds preset frequency modulation dead zone value, generate corresponding primary frequency modulation power instruction of hydroelectric generating set;Based on wavelet packet decomposition technology, the primary frequency modulation power instruction is decomposed to obtain high frequency instruction component and low frequency instruction component;Based on the low frequency instruction component, the actual output power of the hydroelectric generating set is generated;Based on the high frequency instruction component, the power grid frequency deviation, the frequency modulation dead zone value and the real-time state of charge of the flywheel energy storage system, the actual output power of the flywheel energy storage system is generated. Through the application, the effective control of the flywheel energy storage auxiliary hydroelectric generating set participating in the power grid primary frequency modulation can be realized to improve the frequency modulation response speed and regulation accuracy of the hydroelectric generating set.

The utility model discloses a kind of liquid-cooled heat dissipation flywheel energy storage converter that can be installed outdoors, it relates to flywheel energy storage system electrical equipment technical field.For the problems of high heat dissipation cost, not suitable for outdoor installation in prior art, it is divided into top installation area and lower functional area by first horizontal partition layer and first vertical partition layer, top installation area is equipped with liquid cooling unit and centrifugal fan, lower functional area is communicated with liquid cooling unit by air vent, and heat dissipation is directly realized for inductive device vertically installed by centrifugal fan.Cabinet is equipped with independent cooling air duct, and directional air intake and exhaust are realized by grating net;Adopt hollow support installation module to enhance heat dissipation, and set up protection plate, pullable control module to improve outdoor protection and maintenance convenience.The utility model reduces additional fan and liquid cooling power, reduces cost, compact layout reduces ground projection, adapts to complex outdoor environment, and improves operation reliability.

The utility model relates to the flywheel energy storage technical field, and disclose a kind of flywheel energy storage device of reducing power consumption, including upper motor and energy storage mechanism, the upper motor and energy storage mechanism are communicated to form vacuum cavity, the rotating joint of the shaft that the bottom end extends to the inside of energy storage mechanism is connected in the inside of the upper motor, the inside fixedly connected with the sealing cover of the bottom and energy storage mechanism fixed connection of the upper motor, the sealing cover is sleeved in the outside of shaft, the upper motor includes upper casing;This flywheel energy storage device of reducing power consumption can solve the problem of motor temperature rise caused by low heat dissipation coefficient of excitation winding and large rotor eddy current loss, the problem of high self-discharge rate caused by permanent magnet suspension flywheel rotor, the problem of high manufacturing cost caused by winding potting, improve the stability, security in the process of flywheel energy storage system use, reduce flywheel energy storage system cost.

The present application relates to the technical field of communication anti-interference detection, in particular to a flywheel energy storage system communication anti-interference simulation detection method, comprising the following steps: obtaining torque data to generate disturbance characteristics, comparing interference levels to inject electromagnetic signals, monitoring error code statistics and delay errors, analyzing communication levels to generate link anti-interference simulation detection results. In the present application, the disturbance characteristics are constructed by extracting torque mutation points and guided to inject interference frequency bands, forming the causal linkage of disturbance response and electromagnetic interference, and enhancing the pertinence and effectiveness of interference injection; the fluctuation trend of the error rate and the delay peak value are identified by the sliding window to dynamically depict the communication quality degradation process; the synchronization error is calculated by combining the interference spectrum and the error time point to improve the monitoring ability of the time consistency change of the link; the grade mapping is carried out on the basis of multi-dimensional indexes to realize the transformation of anti-interference performance from static test to dynamic evaluation, and to improve the test granularity, adaptability and accuracy.

This invention discloses a flywheel energy storage system, comprising: a cover, a housing, an outer flywheel, an inner rotor, a stator, and a shaft; the cover and housing are detachably connected to form a sealed receiving cavity, within which the outer flywheel, inner rotor, stator, and shaft are all disposed. The outer flywheel and shaft are interference-fitted together. The inner rotor and stator are disposed between the shaft and the outer flywheel and distributed radially along the shaft. The inner rotor is interference-fitted to the shaft, and a cover plate is provided at the end of the inner rotor so that the outer flywheel, inner rotor, and shaft together constitute the flywheel rotor for energy storage. Cooling water pipes are disposed within the stator. This flywheel energy storage system utilizes the structural design of the outer flywheel, enabling the outer flywheel, inner rotor, and shaft to collectively constitute the flywheel rotor of the system, thereby improving the energy storage efficiency. Furthermore, the structural design of the inner rotor and stator further reduces energy loss and heat generation during operation, improving heat dissipation efficiency.

The application discloses an integrated optimization method of a flywheel energy storage system, and the corresponding system is composed of multiple flywheel units in parallel through a direct-current bus. The method comprises the following steps: collecting the real-time rotating speed of each flywheel unit, the direct-current bus voltage, the maximum charging and discharging power capacity and the power instruction of grid frequency regulation; calculating the current kinetic energy based on the rotating speed and the rotor moment of inertia, and obtaining the energy state index SoE by normalization; adopting a double-layer collaborative architecture power scheduling; at the switching moment of the charging and discharging mode, the total disturbance of the system is estimated online through a cascaded extended state observer, and feedforward compensation is implemented in the control output to suppress the instantaneous voltage fluctuation of the direct-current bus. The application realizes accurate characterization of the energy storage state by calculating the kinetic energy and normalizing the SoE; the voltage fluctuation is effectively suppressed when the working condition suddenly changes. Overcharging and overdischarging of individual units are avoided, high reliability and safety are ensured, the service life of the equipment is prolonged, and the application is especially suitable for grid frequency support applications in high-proportion renewable energy access scenarios.

This application relates to the field of power system dispatching technology, and particularly to a method, device, equipment, and medium for coordinated peak shaving based on heterogeneous energy storage systems. The method includes: obtaining the feasible region constraints of the heterogeneous energy storage system; constructing corresponding objective functions with total operating cost, total carbon emissions, and power system frequency stability indicators as targets; performing multi-objective optimization on decision variables based on the objective functions and feasible region constraints to generate a Pareto front solution set; determining the optimal dispatch scheme based on the value of each solution in the Pareto front solution set on each objective function; and analytically obtaining the output commands of the flywheel energy storage system, battery energy storage system, and molten salt thermal energy storage system at the target time based on the optimal dispatch scheme, so as to control the coordinated peak shaving of the heterogeneous energy storage system according to the output commands. This solves the problem in related technologies where a single type of energy storage cannot achieve full coverage of net load fluctuations across multiple time scales, leading to difficulties in simultaneously addressing high-frequency disturbances and long-term peak shaving.

The application provides a virtual synchronous machine control method of an energy storage system and a flywheel energy storage system. The method comprises the following steps: obtaining a current angular frequency change rate and a current angular frequency deviation of the virtual synchronous machine; adaptively adjusting values of virtual inertia, a damping coefficient and virtual impedance of the virtual synchronous machine based on the current angular frequency change rate and the current angular frequency deviation; and inputting the adjusted values of the virtual inertia, the damping coefficient and the virtual impedance into a virtual synchronous machine control link to control a grid-side converter of the energy storage system. The application can help to further improve the dynamic response performance of the virtual synchronous machine.

This invention discloses an energy-saving flywheel energy storage device heat dissipation system, belonging to the technical field of flywheel energy storage systems. It is configured to cool and remove heat from the flywheel body inside the flywheel energy storage device. The flywheel body has rotating shafts on both sides. The system includes: a ring-shaped assembly mounted on the rotating shafts; and a mounting box rotatably connected to the flywheel body via the rotating shafts. One side of the mounting box has an air inlet, and the other side has an air outlet. A cooling fan is located on one side of the air inlet; an airflow channel is formed between the air inlet and the air outlet. This invention effectively removes the heat generated by the high-speed rotation of the flywheel body through the cooling fan, air inlet, ring-shaped assembly, heat sink, and air outlet, avoiding potential safety hazards caused by overheating of the flywheel body.

This invention discloses an axial permanent magnet biased magnetic levitation bearing for flywheel energy storage, relating to the field of magnetic levitation bearing technology. It addresses the technical problems of high power consumption and the inability to achieve zero-current offsetting of constant axial gravity loads in existing magnetic levitation flywheel energy storage systems. The axial permanent magnet biased magnetic levitation bearing for flywheel energy storage of this invention includes a control coil, a stator sleeve, a thrust disk, and a stator cover plate. The stator sleeve includes a connecting plate and a first cylinder. The connecting plate has a first through hole, and the first cylinder is disposed on any surface of the connecting plate. The thrust disk is disposed inside the stator sleeve. The stator cover plate has a second through hole. A control coil is disposed between the stator sleeve and the second cylinder, and the stator cover plate is disposed at the end of the stator sleeve furthest from the connecting plate. The control coil generates bidirectional control currents, which generate positive and negative magnetic fields through the stator sleeve and the stator cover plate, forming a magnetically controllable electromagnet, and acting on the thrust disk to generate axial electromagnetic force.

The application discloses a kind of axial damping buffering device for flywheel energy storage system in the technical field of flywheel energy storage system damping reduction, including base, buffer base and the mounting seat for installing flywheel energy storage system device body, the mounting seat is fixed in the buffer base top, the top edge of the base is fixed with enclosure;Between the base and the buffer base, axial damping buffering structure is connected, including first axial damping buffering component, second axial damping buffering component, damping component and sealing protection component.The application carries out axial damping buffering operation to flywheel energy storage system device body by double damping reduction mode, greatly improves the axial damping buffering effect of flywheel energy storage system device body, and axial damping buffering mechanism can also have the function of positioning flywheel energy storage system device body, so that flywheel energy storage system device body can be well assisted positioning installation in base center, rich function, suitable for promotion.

The application discloses a flywheel energy storage coupled primary frequency modulation unit primary frequency modulation cooperative control method, system, equipment and medium, and belongs to the field of power system automatic control and energy storage technology, and comprises the following steps: in the preset time at the initial stage of the grid frequency out-of-limit, controlling the flywheel energy storage system to undertake all primary frequency modulation target power, and using rapidity to suppress frequency change; controlling the flexible ramp rate of the main frequency modulation unit to increase output and replace the flywheel, and realizing power smooth handover; if the main frequency modulation unit is insufficient due to working medium parameter limitation, the flywheel automatically compensates the power gap; after the frequency modulation action is finished, the total grid-connected power of the system is kept unchanged, the flywheel is charged and discharged by the main frequency modulation unit adjustment base point output, and the state of charge of the flywheel is restored to the best interval without disturbance. The application fully gives play to the power density advantage of the flywheel and the energy advantage of the main frequency modulation unit, effectively solves the contradiction between frequency modulation response speed and duration, and improves the grid frequency stability.

This invention discloses a flywheel energy storage experimental system based on edge magnetic pole drive, comprising a flywheel rotor module, an edge drive module, a measurement and control interface module, and a bridge armature module. The system adopts a Wheel-to-Arm (W→A) edge drive architecture, distributing N-pole electromagnets (N≥4) circumferentially around the outer edge of the flywheel body, forming M sets of symmetrical force couples. The electromagnetic force application point is located at 2R of the flywheel diameter, with the lever arm extending to 200mm. Under a DC 12V drive voltage, it outputs a drive torque ≥9N·m, which is 4-8 times higher than the traditional shaft-driven torque. The modular counterweight system allows for ten adjustable levels of rotational inertia (0.025-0.25 kg·m²), an adjustable electromagnetic air gap (0.2-2mm), and an adjustable magnetic field deflection (±7-13.5°), supporting hierarchical teaching and research through ten-dimensional experimental variables. This invention has been fully verified through a functional verification model, perfectly simulating the external rotor motor drive characteristics of a large energy storage flywheel, filling the gap in flywheel energy storage experimental equipment in universities.

This invention discloses a fault self-diagnosis and redundancy protection method for flywheel energy storage systems, relating to the field of flywheel energy storage technology. The specific steps of this method are: multi-physics field data acquisition, data processing and feature extraction, multi-source data fusion analysis, three-dimensional fault determination, and fault classification and redundancy protection execution. By constructing a multi-physics field data fusion diagnosis and three-dimensional fault determination mechanism, this invention fundamentally improves the fault diagnosis capability of flywheel energy storage systems. Based on four types of deployed sensors and a standardized feature extraction process, it can simultaneously capture the panoramic operating status of mechanical vibration, spatial magnetic field, temperature distribution, and electrical parameters. Through the multi-physics field feature fusion degree calculation formula, the feature parameters of different physical quantities are coupled and correlated in a unified dimension, achieving accurate identification of complex faults. This optimizes fault diagnosis from simple judgment based on a single signal threshold to intelligent identification based on the inherent correlation of multi-source information.

A multistage vibration reduction and isolation structure of a flywheel energy storage system is used for reducing the vibration of a flywheel energy storage body, which comprises a flywheel shaft system and a body shell, the flywheel shaft system being located in the body shell, the multistage vibration reduction and isolation structure comprising a connecting plate, a viscoelastic material and a pre-embedded cover plate, the flywheel energy storage body being fixedly installed on the connecting plate through a plurality of high-strength bolts, the pre-embedded cover plate being fixed on a concrete base, the connecting plate being located above the pre-embedded cover plate, and the connecting plate and the pre-embedded cover plate jointly forming a clearance in meshing with each other, the clearance accommodating the viscoelastic layer. The non-fixed interface cooperation between the connecting plate and the pre-embedded cover plate makes the system trigger the shear, sliding and inclined plane compression and shear mechanisms in turn under different amplitudes, thereby ensuring the safety of the magnetic suspension bearing control system in the flywheel shaft system.

This invention relates to the field of flywheel machining tooling technology, specifically to a flywheel machining tooling and method for a new energy flywheel energy storage system. The tooling includes a machining base, and further comprises: an outer clamping unit for clamping the peripheral sidewall of the flywheel body placed on the machining base in the direction of the flywheel body's axis; an inner positioning unit for supporting and positioning the inner wall of the flywheel body's shaft hole in the direction of the flywheel body's peripheral sidewall; and a machining assembly for machining the upper surface of the clamped and positioned flywheel body. By setting the outer clamping unit and the inner positioning unit, the outer sidewall and the inner wall of the shaft hole of the flywheel body are clamped in the radial direction, respectively, thus improving the reliability of the flywheel body during machining. Simultaneously, the inner positioning unit positions the flywheel body during support, facilitating alignment between the machining assembly and the flywheel body and improving machining efficiency. Furthermore, it can meet the machining requirements of flywheel bodies of different sizes, thus having a wider range of applications.

The present application relates to a kind of flywheel energy storage system gravity block dynamic energy storage control method and system, it is related to flywheel technical field, including, the method according to power grid frequency deviation and flywheel rotor real-time speed calculation instantaneous power gap, determine the lifting direction of gravity block and target height, generate lifting instruction;Combining gravity block speed, acceleration and stroke limit, the instruction is dynamically constrained and checked, and target position sequence is formed;Drive winch motor to execute lifting or drop: when dropping, winch motor generates electricity and drives flywheel to accelerate to target speed by bidirectional converter;When lifting, flywheel deceleration generates electricity for winch motor to lift gravity block energy storage;After frequency recovery, stop gravity block movement, flywheel idling maintains current speed, solve the technical problem that when power grid frequency disturbance occurs, system is difficult to lift the lifting action of gravity block according to flywheel current speed and frequency deviation real-time matching, leading to low energy transfer efficiency.

The application provides a flywheel energy storage permanent magnet synchronous motor stator-rotor end assembly and a flywheel energy storage system, the end assembly comprising a stator end, a rotor end and a conical air gap; the stator end comprises a first conical surface; the rotor end comprises a second conical surface; the first conical surface and the second conical surface form a conical air gap at the stator-rotor concentric position, wherein the conical air gap is designed with an expanding angle from the center to the outside, for generating a radial induction lifting electromagnetic force through the electromagnetic induction principle. The application generates a radial lifting force through the electromagnetic induction by the design of the stator-rotor end conical air gap, shares the bearing load to reduce the friction loss, and at the same time enhances the rotor rigidity to suppress resonance, thereby improving the efficiency and reliability of the flywheel energy storage motor.