Bimodal magnetic field dynamic adjustment magnetic suspension flywheel energy storage system

Abstract

The invention discloses a bimodal magnetic field dynamic adjustment magnetic suspension flywheel energy storage system, and belongs to the technical field of magnetic suspension flywheels. A bimodal magnetic field dynamic adjustment magnetic suspension flywheel energy storage system comprises a parameter acquisition module, a parameter calculation module and a dynamic adjustment module. According to the method, the problems of overcharge or undercharge of the flywheel, aggravation of mechanical fatigue and even failure of a rotor caused by deviation in prediction in the prior art are solved, and flywheel jitter caused by sudden change of the rotating speed can be reduced according to different rotating speed stages by monitoring the rotating speed step value in real time; voltage fluctuation can be compensated in advance in combination with voltage change trend prediction, rotation speed fluctuation caused by unstable power supply is avoided, external interference can be rapidly recognized through real-time feedback of local magnetic field fluctuation values, and unnecessary energy loss is reduced by matching rotation speed and magnetic field requirements through dynamic adjustment; the service life of the rotor and the bearing of the magnetic suspension flywheel is obviously prolonged, frequent maintenance is not needed, and operation loss is low.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic levitation flywheels, and in particular to a dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system. Background Art

[0002] The magnetic levitation flywheel battery is an efficient, clean, and mobile secondary discharge device that stores mechanical energy instead of electrical energy. By utilizing a non-contact rotating flywheel to store energy, it offers advantages such as high energy density, high energy conversion efficiency, compact size, light weight, and long service life. Therefore, it offers a new approach to addressing the growing concern regarding battery storage in new energy vehicles.

[0003] Chinese patent publication number CN119010125A discloses a magnetic levitation flywheel energy storage control and frequency modulation system. The system includes: an energy data acquisition module that receives current and voltage data based on a power grid interface, synchronizes and records the exact time of data reception, preliminarily processes the current and voltage data, converts the data into structured time series data, and obtains a formatted energy data set. By collecting current and voltage data from the power grid interface and recording the reception time, the data is converted into a structured time series format to improve the accuracy and efficiency of data processing, calculates and compares the fit between data points, and screens highly correlated data points to form a dynamic similarity matrix. By performing frequency principal component analysis and fast Fourier transform, the key frequency components of the power grid data are extracted, the power grid frequency fluctuations are monitored, and the LSTM network is used in combination with historical data for model training to improve the ability to predict future power grid energy demand and flow trends.

[0004] In actual use, the above patent constructs a frequency modulation prediction model and uses the frequency modulation prediction model to control the magnetic levitation flywheel energy storage system. However, due to the unpredictable suddenness of grid demand fluctuations, such as extreme weather or equipment failure, the prediction model will have the risk of prediction error. The deviation in the prediction may cause the flywheel to be overcharged or undercharged, aggravate mechanical fatigue and even cause rotor failure. Therefore, it does not meet the existing needs. For this reason, we propose a dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system. Summary of the Invention

[0005] The purpose of the present invention is to provide a dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system. By real-time monitoring of the speed step value, the flywheel jitter caused by sudden speed change can be reduced according to different speed stages. Combined with the voltage change trend prediction, voltage fluctuations can be compensated in advance to avoid speed fluctuations caused by unstable power supply. The real-time feedback of the local magnetic field fluctuation value can quickly identify external interference. Dynamic regulation reduces unnecessary energy loss by matching the speed and magnetic field requirements, significantly extending the service life of the magnetic levitation flywheel rotor and bearings, and does not require frequent maintenance and has low operating losses, solving the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system, comprising:

[0007] A parameter acquisition module is used to monitor and collect parameters of the magnetic levitation flywheel in real time through sensors;

[0008] The parameter calculation module is used to calculate the working voltage and step speed value at the next moment based on the real-time collected parameters, and to identify local magnetic field fluctuations.

[0009] The dynamic adjustment module is used to dynamically adjust the magnetic field parameters of the drive motor and the magnetic bearing in the energy storage or release mode of the magnetic levitation flywheel based on the calculation results of the parameter calculation module.

[0010] Preferably, the parameter acquisition module includes:

[0011] The monitoring unit is used to use the Hall sensor array to be distributed along the circumference and axial direction of the permanent magnet of the magnetic levitation flywheel to collect dynamic magnetic field strength, direction and gradient data in real time, and simultaneously record the flywheel speed, temperature and load parameters;

[0012] The processing unit is used to use Kalman filtering to remove high-frequency noise in the collected parameters, eliminate the drift error of the Hall sensor, and perform spatial interpolation on non-uniform sampling points to generate a continuous magnetic field distribution map.

[0013] Preferably, the parameter calculation module includes:

[0014] an identification unit, for comparing the simulated parameters with the parameters output by the equivalent magnetic network model, and identifying the local magnetic field fluctuation value according to the comparison result;

[0015] A voltage calculation unit, used to calculate the working voltage at the next moment according to the output voltage and output current of the magnetic levitation flywheel;

[0016] The speed value calculation unit is used to calculate the step speed value by using the speed value, speed difference, adjustment time and transition target value of the magnetic suspension flywheel.

[0017] Preferably, the identification unit specifically includes:

[0018] Finite element simulation is used to simulate the dynamic magnetic field characteristics of the permanent magnet of the magnetic levitation flywheel at different speeds, and the edge flux and leakage flux coefficient are predicted based on the dynamic magnetic field characteristics;

[0019] An equivalent magnetic network model of the permanent magnet of the magnetic levitation flywheel is established, and the magnetic permeability parameters in the equivalent magnetic network model are corrected through iterative calculation;

[0020] The parameters of the finite element simulation are compared with the parameters output by the equivalent magnetic network model, and the deviation threshold of the magnetic field strength of the magnetic levitation flywheel is determined based on the comparison results, which is the local magnetic field fluctuation value.

[0021] Preferably, the voltage calculation unit specifically includes:

[0022] Calculate the current output power of the magnetic levitation flywheel based on the output voltage and output current of the magnetic levitation flywheel collected in real time;

[0023] Calculate the power deviation from the preset maximum power point based on the current output power;

[0024] The incremental conductance method is used to determine the direction and magnitude of the power deviation, and the adjustment direction is determined by calculating the relationship between the admittance change rate and the current admittance.

[0025] According to the magnitude and direction of the power deviation, the electromagnetic coil current of the active magnetic bearing is determined, and the working voltage at the next moment is calculated according to the electromagnetic coil current of the active magnetic bearing.

[0026] Preferably, the speed value calculation unit includes:

[0027] An acquisition unit, used to acquire the current speed value, the minimum speed value, and the maximum speed value of the magnetic levitation flywheel;

[0028] A speed value adjustment unit, configured to adjust the speed value of the magnetic levitation flywheel progressively from the current speed value to the transition target speed value at that moment, until the transition target speed value is equal to the target speed value;

[0029] The step speed value calculation unit is used to obtain the speed difference within a unit time according to the speed difference and the predetermined speed adjustment time to obtain the step speed value.

[0030] Preferably, the speed value calculation unit specifically includes:

[0031] Obtain the current speed value, minimum speed value, and maximum speed value of the magnetic levitation flywheel, and calculate the speed difference based on the current speed value, minimum speed value, and maximum speed value;

[0032] Setting the target speed value, transition target value, and speed adjustment time of the magnetic levitation flywheel in energy storage and release modes;

[0033] When the transition target speed value at the previous moment is different from the target speed value, the transition target speed value at the previous moment is superimposed on the step speed value to obtain the transition target speed value at the current moment;

[0034] Starting from the current speed value, the speed value of the magnetic levitation flywheel is progressively adjusted to the transition target speed value at that moment, until the transition target speed value is equal to the target speed value;

[0035] The speed difference within a unit time is obtained according to the speed difference and the predetermined speed adjustment time, and the step speed value is obtained according to the speed difference within the unit time.

[0036] Preferably, the dynamic adjustment module includes:

[0037] A judgment unit is used to analyze the mechanical loss and electromagnetic loss of the current magnetic levitation flywheel in combination with the speed step value, the voltage change trend at the next moment, and the local magnetic field fluctuation value, and to determine whether the mechanical loss and electromagnetic loss exceed a preset threshold;

[0038] The adjustment unit is used to generate a dynamic adjustment strategy for the magnetic levitation flywheel according to the judgment result, and dynamically adjust the energy storage and release of the magnetic levitation flywheel according to the dynamic adjustment strategy.

[0039] Preferably, the dynamic adjustment module specifically includes:

[0040] Preset thresholds for mechanical and electromagnetic losses of the magnetic levitation flywheel in energy storage and release modes, and determine the target magnetic field strength range corresponding to the current speed based on the step speed value;

[0041] The voltage change trend at the next moment within the target magnetic field intensity range is combined with the local magnetic field fluctuation value to analyze the current mechanical loss and electromagnetic loss of the magnetic levitation flywheel and determine whether the mechanical loss and electromagnetic loss exceed the preset threshold;

[0042] If the result of the judgment exceeds the preset threshold, it is determined that the magnetic levitation flywheel is currently in the energy storage mode or energy release mode according to the operating mode of the magnetic levitation flywheel and the output demand of the power converter;

[0043] The magnetic field of the magnetic levitation flywheel is dynamically adjusted accordingly according to the current mode of the magnetic levitation flywheel.

[0044] Preferably, the adjustment unit includes:

[0045] If the magnetic levitation flywheel is in the energy storage mode, the magnetic field is gradually enhanced to increase the speed, while the magnetic field distribution of the axial magnetic bearing is optimized to suppress the vibration caused by the gyroscopic effect and stabilize the rotor position;

[0046] If the magnetic levitation flywheel is in the energy release mode, the magnetic field strength is gradually reduced in steps to reduce the speed. By enhancing the magnetic field stability of the radial magnetic bearing, the centrifugal force change caused by the speed decrease is compensated, maintaining the rotor suspension accuracy while synchronously matching the energy release rate.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] The present invention dynamically adjusts the magnetic field strength of the magnetic levitation bearing, which can optimize the levitation force in real time according to the speed of the magnetic levitation flywheel, reduce mechanical friction loss, improve energy storage efficiency, enhance system stability, and enable the magnetic levitation flywheel to quickly respond to the frequency modulation needs of the power grid, achieve millisecond-level electric energy charging and discharging, and ensure the frequency stability of the power system. Dynamic adjustment of the magnetic field can avoid local overheating or material fatigue, significantly extend the service life of the magnetic levitation flywheel rotor and bearings, and do not require frequent maintenance, with low operating losses, making it suitable for long-term high-frequency charging and discharging scenarios. By real-time monitoring of the speed step value, the magnetic field strength can be automatically adjusted according to different speed stages to reduce flywheel jitter caused by sudden speed changes. Combined with the voltage change trend prediction, voltage fluctuations can be compensated in advance to avoid speed fluctuations caused by unstable power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a module diagram of a dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system of the present invention;

[0050] Figure 2 This is a flow chart of a dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system of the present invention. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] To address the existing problem of controlling the magnetic levitation flywheel energy storage system by building a frequency modulation prediction model and using the frequency modulation prediction model, the prediction model will have the risk of prediction error due to the unpredictable suddenness of grid demand fluctuations, such as extreme weather or equipment failure. The prediction deviation may cause the flywheel to overcharge or undercharge, aggravate mechanical fatigue and even cause rotor failure. Figure 1-Figure 2 , this embodiment provides the following technical solutions:

[0053] A dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system, comprising:

[0054] A parameter acquisition module is used to monitor and collect parameters of the magnetic levitation flywheel in real time through sensors;

[0055] The parameter calculation module is used to calculate the working voltage and step speed value at the next moment based on the real-time collected parameters, and to identify local magnetic field fluctuations.

[0056] The dynamic adjustment module is used to dynamically adjust the magnetic field parameters of the drive motor and magnetic bearing in the energy storage or release mode of the magnetic levitation flywheel based on the calculation results of the parameter calculation module to avoid mechanical vibration or energy loss.

[0057] Parameter acquisition module, including:

[0058] The monitoring unit is used to use the Hall sensor array to be distributed along the circumference and axial direction of the permanent magnet of the magnetic levitation flywheel to collect dynamic magnetic field strength, direction and gradient data in real time, and simultaneously record the flywheel speed, temperature and load parameters;

[0059] The processing unit is used to use Kalman filtering to remove high-frequency noise in the collected parameters, eliminate the drift error of the Hall sensor, and perform spatial interpolation on non-uniform sampling points to generate a continuous magnetic field distribution map.

[0060] Parameter calculation module, including:

[0061] an identification unit, for comparing the simulated parameters with the parameters output by the equivalent magnetic network model, and identifying the local magnetic field fluctuation value according to the comparison result;

[0062] A voltage calculation unit, used to calculate the working voltage at the next moment according to the output voltage and output current of the magnetic levitation flywheel;

[0063] The speed value calculation unit is used to calculate the step speed value by using the speed value, speed difference, adjustment time and transition target value of the magnetic suspension flywheel.

[0064] Identification unit, specifically including:

[0065] Finite element simulation is used to simulate the dynamic magnetic field characteristics of the permanent magnet of the magnetic levitation flywheel at different speeds, and the edge flux and leakage flux coefficient are predicted based on the dynamic magnetic field characteristics;

[0066] An equivalent magnetic network model of the permanent magnet of the magnetic levitation flywheel is established, and the magnetic permeability parameters in the equivalent magnetic network model are corrected through iterative calculation to ensure the accuracy of the model under high load;

[0067] The parameters of the finite element simulation are compared with the parameters output by the equivalent magnetic network model, and the deviation threshold of the magnetic field strength of the magnetic levitation flywheel is determined based on the comparison results, which is the local magnetic field fluctuation value.

[0068] The voltage calculation unit specifically includes:

[0069] Calculate the current output power of the magnetic levitation flywheel based on the output voltage and output current of the magnetic levitation flywheel collected in real time;

[0070] Calculate the power deviation from the preset maximum power point based on the current output power;

[0071] The incremental conductance method is used to determine the direction and magnitude of the power deviation, and the adjustment direction is determined by calculating the relationship between the admittance change rate and the current admittance.

[0072] According to the magnitude and direction of the power deviation, the electromagnetic coil current of the active magnetic bearing is determined, and the working voltage at the next moment is calculated according to the electromagnetic coil current of the active magnetic bearing.

[0073] The speed value calculation unit includes:

[0074] An acquisition unit, used to acquire the current speed value, the minimum speed value, and the maximum speed value of the magnetic levitation flywheel;

[0075] A speed value adjustment unit, configured to adjust the speed value of the magnetic levitation flywheel progressively from the current speed value to the transition target speed value at that moment, until the transition target speed value is equal to the target speed value;

[0076] The step speed value calculation unit is used to obtain the speed difference within a unit time according to the speed difference and the predetermined speed adjustment time to obtain the step speed value.

[0077] The speed value calculation unit specifically includes:

[0078] Obtain the current speed value, minimum speed value, and maximum speed value of the magnetic levitation flywheel, and calculate the speed difference based on the current speed value, minimum speed value, and maximum speed value;

[0079] Setting the target speed value, transition target value, and speed adjustment time of the magnetic levitation flywheel in energy storage and release modes;

[0080] When the transition target speed value at the previous moment is different from the target speed value, the transition target speed value at the previous moment is superimposed on the step speed value to obtain the transition target speed value at the current moment;

[0081] Starting from the current speed value, the speed value of the magnetic levitation flywheel is progressively adjusted to the transition target speed value at that moment, until the transition target speed value is equal to the target speed value;

[0082] The speed difference within a unit time is obtained according to the speed difference and the predetermined speed adjustment time, and the step speed value is obtained according to the speed difference within the unit time.

[0083] Dynamic adjustment module, including:

[0084] A judgment unit is used to analyze the mechanical loss and electromagnetic loss of the current magnetic levitation flywheel in combination with the speed step value, the voltage change trend at the next moment, and the local magnetic field fluctuation value, and to determine whether the mechanical loss and electromagnetic loss exceed a preset threshold;

[0085] The adjustment unit is used to generate a dynamic adjustment strategy for the magnetic levitation flywheel according to the judgment result, and dynamically adjust the energy storage and release of the magnetic levitation flywheel according to the dynamic adjustment strategy.

[0086] Dynamic adjustment module, specifically including:

[0087] Preset thresholds for mechanical and electromagnetic losses of the magnetic levitation flywheel in energy storage and release modes, and determine the target magnetic field strength range corresponding to the current speed based on the step speed value;

[0088] Analyze the current mechanical and electromagnetic losses of the magnetic levitation flywheel using the target magnetic field intensity range, the voltage change trend at the next moment, and the local magnetic field fluctuation value, and determine whether the mechanical and electromagnetic losses exceed the preset thresholds.

[0089] If the result of the judgment exceeds the preset threshold, the magnetic levitation flywheel is determined to be in energy storage or energy release mode according to the operating mode of the magnetic levitation flywheel and the output demand of the power converter. When storing energy, it is accelerated by electric power, and when releasing energy, it is decelerated by power generation.

[0090] The magnetic field of the magnetic levitation flywheel is dynamically adjusted accordingly according to the current mode of the magnetic levitation flywheel.

[0091] By real-time monitoring of speed steps, the system can automatically adjust the magnetic field strength according to different speed stages, such as acceleration, deceleration, and steady state, reducing flywheel jitter caused by sudden speed changes. For example, during the flywheel charging and discharging process, combined with voltage change trend prediction, voltage fluctuations can be compensated in advance to avoid speed fluctuations caused by unstable power supply. Real-time feedback of local magnetic field fluctuation values can quickly identify external interference, such as mechanical vibration or electromagnetic noise, and dynamically offset magnetic field distortion by adjusting the excitation current, thereby improving the system's robustness to parameter perturbations and external disturbances. For example, although vibration acceleration may be generated under high-frequency interference, dynamic adjustment can limit it to a safe range. Dynamic adjustment reduces unnecessary energy loss by matching speed with magnetic field requirements. For example, in flywheel towing charging and discharging experiments, by coordinating the charging and discharging states of multiple flywheels, grid capacity limitations can be avoided and energy waste can be reduced. At the same time, reducing the impact of mechanical vibration and electromagnetic fluctuations on bearings can extend the service life of the magnetic levitation flywheel.

[0092] Adjustment unit, comprising:

[0093] If the magnetic levitation flywheel is in the energy storage mode, the magnetic field is gradually strengthened to increase the speed. At the same time, the magnetic field distribution of the axial magnetic bearing is optimized to suppress the vibration caused by the gyroscopic effect, stabilize the rotor position, and avoid deviation caused by kinetic energy accumulation;

[0094] If the magnetic levitation flywheel is in the energy release mode, the magnetic field strength is gradually reduced in steps to reduce the speed. By enhancing the magnetic field stability of the radial magnetic bearing, the centrifugal force change caused by the speed decrease is compensated, maintaining the rotor suspension accuracy while synchronously matching the energy release rate.

[0095] Working principle: When using a dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system of the present invention, according to Figure 1 and Figure 2 , including the following steps:

[0096] Step 1: Use a Hall sensor array to be placed along the circumference and axial direction of the permanent magnet of the magnetic levitation flywheel to collect dynamic magnetic field strength, direction and gradient data in real time, and simultaneously record and process the flywheel speed, temperature and load parameters;

[0097] Step 2: Identify the local magnetic field fluctuation value, calculate the working voltage at the next moment using the output voltage and output current of the magnetic levitation flywheel, and calculate the step speed value using the speed value, speed difference, adjustment time and transition target value of the magnetic levitation flywheel;

[0098] Step 3: Analyze the mechanical loss and electromagnetic loss of the current magnetic levitation flywheel based on the speed step value, the voltage change trend at the next moment, and the local magnetic field fluctuation value, and determine whether the mechanical loss and electromagnetic loss exceed the preset threshold;

[0099] Step 4: If the result of the judgment is that the preset threshold is exceeded, the magnetic levitation flywheel is determined to be in an energy storage mode or an energy release mode according to the operating mode of the magnetic levitation flywheel and the output requirement of the power converter;

[0100] Step 5: If the magnetic levitation flywheel is in the energy storage mode, gradually increase the magnetic field to increase the rotational speed. At the same time, optimize the magnetic field distribution of the axial magnetic bearing to suppress the vibration caused by the gyroscopic effect and stabilize the rotor position.

[0101] Step 6: If the magnetic levitation flywheel is in the energy release mode, gradually reduce the magnetic field strength in steps to reduce the speed. By enhancing the magnetic field stability of the radial magnetic bearing, the centrifugal force change caused by the speed decrease is compensated, maintaining the rotor suspension accuracy while synchronously matching the energy release rate.

[0102] In summary, the dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system of the present invention can optimize the suspension force in real time according to the rotation speed of the magnetic levitation flywheel by dynamically adjusting the magnetic field strength of the magnetic levitation bearing, reduce mechanical friction loss, improve energy storage efficiency, enhance system stability, and enable the magnetic levitation flywheel to quickly respond to the frequency modulation needs of the power grid, realize millisecond-level electric energy charging and discharging, and ensure the stability of the power system frequency. In the energy storage stage, the electric energy is efficiently converted into the kinetic energy of the magnetic levitation flywheel, and the kinetic energy is quickly converted into electric energy output in the energy release stage, supporting the regulation of instantaneous power fluctuations in the power grid, extending the life of the equipment and reducing maintenance costs. The dynamic regulation of the magnetic field can avoid local overheating or material fatigue, significantly extending the service life of the magnetic levitation flywheel rotor and bearings, and does not require frequent maintenance, with low operating losses, and is suitable for long In high-frequency charging and discharging scenarios, by real-time monitoring of the speed step value, the system can automatically adjust the magnetic field strength according to different speed stages, such as acceleration, deceleration, and steady state, to reduce flywheel jitter caused by sudden speed changes. For example, during the flywheel charging and discharging process, combined with the voltage change trend prediction, voltage fluctuations can be compensated in advance to avoid speed fluctuations caused by unstable power supply. Real-time feedback of local magnetic field fluctuation values can quickly identify external interference, such as mechanical vibration or electromagnetic noise, and dynamically offset the magnetic field distortion by adjusting the excitation current, thereby improving the system's robustness to parameter perturbations and external disturbances. For example, although vibration acceleration may be generated under high-frequency interference, dynamic adjustment can limit it to a safe range. Dynamic adjustment reduces unnecessary energy loss by matching the speed and magnetic field requirements.

[0103] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0104] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system, characterized in that: include: A parameter acquisition module is used to monitor and collect parameters of the magnetic levitation flywheel in real time through sensors; The parameter calculation module is used to calculate the operating voltage and step speed value at the next moment based on the real-time collected parameters, and identify local magnetic field fluctuations; The dynamic adjustment module is used to dynamically adjust the magnetic field parameters of the drive motor and the magnetic bearing in the energy storage or release mode of the magnetic levitation flywheel according to the calculation results of the parameter calculation module.

2. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 1, characterized in that: The parameter acquisition module includes: The monitoring unit is used to use the Hall sensor array to be distributed along the circumference and axial direction of the permanent magnet of the magnetic levitation flywheel to collect dynamic magnetic field strength, direction and gradient data in real time, and simultaneously record the flywheel speed, temperature and load parameters; The processing unit is used to use Kalman filtering to remove high-frequency noise in the collected parameters, eliminate the drift error of the Hall sensor, and perform spatial interpolation on non-uniform sampling points to generate a continuous magnetic field distribution map.

3. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 1, characterized in that: The parameter calculation module includes: an identification unit, for comparing the simulated parameters with the parameters output by the equivalent magnetic network model, and identifying the local magnetic field fluctuation value according to the comparison result; A voltage calculation unit, used to calculate the working voltage at the next moment according to the output voltage and output current of the magnetic levitation flywheel; The speed value calculation unit is used to calculate the step speed value by using the speed value, speed difference, adjustment time and transition target value of the magnetic suspension flywheel.

4. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 3 is characterized by: The identification unit specifically includes: Finite element simulation is used to simulate the dynamic magnetic field characteristics of the permanent magnet of the magnetic levitation flywheel at different speeds, and the edge flux and leakage flux coefficient are predicted based on the dynamic magnetic field characteristics; An equivalent magnetic network model of the permanent magnet of the magnetic levitation flywheel is established, and the magnetic permeability parameters in the equivalent magnetic network model are corrected through iterative calculation; The parameters of the finite element simulation are compared with the parameters output by the equivalent magnetic network model, and the deviation threshold of the magnetic field strength of the magnetic levitation flywheel is determined based on the comparison results, which is the local magnetic field fluctuation value.

5. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 3, characterized in that: The voltage calculation unit specifically includes: Calculate the current output power of the magnetic levitation flywheel based on the output voltage and output current of the magnetic levitation flywheel collected in real time; Calculate the power deviation from the preset maximum power point based on the current output power; The incremental conductance method is used to determine the direction and magnitude of the power deviation, and the adjustment direction is determined by calculating the relationship between the admittance change rate and the current admittance. According to the magnitude and direction of the power deviation, the electromagnetic coil current of the active magnetic bearing is determined, and the working voltage at the next moment is calculated according to the electromagnetic coil current of the active magnetic bearing.

6. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 3, characterized in that: The speed value calculation unit includes: An acquisition unit, used to acquire the current speed value, the minimum speed value, and the maximum speed value of the magnetic levitation flywheel; A speed value adjustment unit, configured to adjust the speed value of the magnetic levitation flywheel progressively from the current speed value to the transition target speed value at that moment, until the transition target speed value is equal to the target speed value; The step speed value calculation unit is used to obtain the speed difference within a unit time according to the speed difference and the predetermined speed adjustment time to obtain the step speed value.

7. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 6, characterized in that: The speed value calculation unit specifically includes: Obtain the current speed value, minimum speed value, and maximum speed value of the magnetic levitation flywheel, and calculate the speed difference based on the current speed value, minimum speed value, and maximum speed value; Setting the target speed value, transition target value, and speed adjustment time of the magnetic levitation flywheel in energy storage and release modes; When the transition target speed value at the previous moment is different from the target speed value, the transition target speed value at the previous moment is superimposed on the step speed value to obtain the transition target speed value at the current moment; Starting from the current speed value, the speed value of the magnetic levitation flywheel is progressively adjusted to the transition target speed value at that moment, until the transition target speed value is equal to the target speed value; The speed difference within a unit time is obtained according to the speed difference and the predetermined speed adjustment time, and the step speed value is obtained according to the speed difference within the unit time.

8. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 1, characterized in that: The dynamic adjustment module includes: A judgment unit is used to analyze the mechanical loss and electromagnetic loss of the current magnetic levitation flywheel in combination with the speed step value, the voltage change trend at the next moment, and the local magnetic field fluctuation value, and to determine whether the mechanical loss and electromagnetic loss exceed a preset threshold; The adjustment unit is used to generate a dynamic adjustment strategy for the magnetic levitation flywheel according to the judgment result, and dynamically adjust the energy storage and release of the magnetic levitation flywheel according to the dynamic adjustment strategy.

9. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 8, characterized in that: The dynamic adjustment module specifically includes: Preset thresholds for mechanical and electromagnetic losses of the magnetic levitation flywheel in energy storage and release modes, and determine the target magnetic field strength range corresponding to the current speed based on the step speed value; The voltage change trend at the next moment within the target magnetic field intensity range is combined with the local magnetic field fluctuation value to analyze the current mechanical loss and electromagnetic loss of the magnetic levitation flywheel and determine whether the mechanical loss and electromagnetic loss exceed the preset threshold; If the result of the judgment exceeds the preset threshold, it is determined that the magnetic levitation flywheel is currently in the energy storage mode or energy release mode according to the operating mode of the magnetic levitation flywheel and the output demand of the power converter; The magnetic field of the magnetic levitation flywheel is dynamically adjusted accordingly according to the current mode of the magnetic levitation flywheel.

10. The dual-mode magnetic field dynamic regulation magnetic levitation flywheel energy storage system according to claim 8, characterized in that: The adjustment unit includes: If the magnetic levitation flywheel is in the energy storage mode, the magnetic field is gradually enhanced to increase the speed, while the magnetic field distribution of the axial magnetic bearing is optimized to suppress the vibration caused by the gyroscopic effect and stabilize the rotor position; If the magnetic levitation flywheel is in the energy release mode, the magnetic field strength is gradually reduced in steps to reduce the speed. By enhancing the magnetic field stability of the radial magnetic bearing, the centrifugal force change caused by the speed decrease is compensated, maintaining the rotor suspension accuracy while synchronously matching the energy release rate.

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