125 results about "Flywheel energy storage system" patented technology

The invention belongs to the field of new energy, and particularly discloses a direct-current bus voltage control method and system of a flywheel energy storage system. Comprising the following steps: if DC bus voltage is in a normal range, DC voltage forms a q-axis current reference signal after being adjusted by a PI controller, the q-axis current reference signal generates a q-axis voltage instruction signal after being adjusted by a current control loop PI, and a dq-axis voltage instruction value is generated through decoupling; if the current control loop slightly deviates from the normal range, parameters of a PI controller are adjusted, so that an integration link plays a leading role in control output, a virtual impedance link connected to the current control loop in parallel is adjusted, and a dq-axis voltage instruction value is generated; and if the voltage is seriously deviated from the normal range, a grid-side power signal is fed forward to a machine-side direct-current voltage control loop, virtual resistance in a virtual impedance link is adjusted, and a dq-axis voltage instruction value is generated. According to the invention, the control mode is automatically switched according to different conditions of the DC bus voltage by adopting a threshold-grading regulation and control strategy, and the adaptability to large disturbance is improved while the steady-state precision of the system is maintained.

The invention discloses an integrated optimization method of a flywheel energy storage system. The corresponding system is formed by connecting a plurality of flywheel monomers in parallel through a direct current bus. The method comprises the steps that the real-time rotating speed, the direct-current bus voltage, the maximum charging and discharging power capacity and a power grid frequency modulation power instruction of each flywheel single body are collected; calculating current stored kinetic energy based on the rotating speed and the rotational inertia of the rotor, and normalizing to obtain an energy state index SoE; a double-layer collaborative architecture is adopted for power scheduling; at the moment of charging and discharging mode switching, the total disturbance of the system is estimated on line through a cascade expansion state observer, and feed-forward compensation is implemented in control output to suppress instantaneous fluctuation of the voltage of the direct-current bus. According to the method, the SoE is obtained by calculating the kinetic energy and normalizing the kinetic energy, so that the accurate representation of the energy storage state is realized; and voltage fluctuation can be effectively suppressed when working conditions suddenly change. The method avoids overcharge and overdischarge of individual units, guarantees high reliability and safety, prolongs the service life of equipment, and is especially suitable for power grid frequency support application in a high-proportion renewable energy access scene.

The embodiment of the invention provides a flywheel energy storage system and an electrical control method and system thereof, and the electrical control method comprises the steps: collecting the operation state data of the flywheel energy storage system in real time, and carrying out the preprocessing of the operation state data; inputting the preprocessed operation state data into a parameter adaptive control algorithm, dynamically adjusting control parameters of the algorithm through fuzzy logic, and generating a control instruction for controlling the power converter; based on the control instruction and the real-time demand of a power grid, cooperatively controlling the output power and the direct-current voltage of the flywheel energy storage system, and when it is detected that the direct-current voltage deviates from a target range, automatically switching an electrical control mode to a voltage stabilization mode for stabilizing the direct-current voltage within the target range; and monitoring the operation state of the flywheel energy storage system in real time, and triggering a protection mechanism when at least one abnormity of overvoltage abnormity, overcurrent abnormity or mechanical fault abnormity is detected.

The invention discloses an island micro-grid frequency coordination control method based on flywheel and battery hybrid energy storage, and provides a hybrid energy storage coordination control method for solving the problem that a diesel generator in an island micro-grid is low in inherent response speed and difficult to deal with rapid load disturbance in time. The method combines the advantages of a flywheel energy storage system (FESS) and a battery energy storage system (BESS) to construct a multi-time-scale frequency regulation mechanism: the FESS is responsible for absorbing or releasing a high-frequency power component and quickly responding to instantaneous fluctuation; the BESS bears an intermediate-frequency power component and realizes medium-term energy regulation; and the diesel generator compensates the low-frequency power component and maintains long-term steady-state operation. Through the multi-unit collaborative hierarchical control, the frequency stability and the operation reliability of the island micro-grid are remarkably improved, the dynamic regulation pressure of the diesel engine is reduced, and the frequent charge-discharge cycle of the battery is reduced, so that the service life of the energy storage system is prolonged.

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.

The invention discloses a charging and discharging control method and system for flywheel energy storage, and belongs to the technical field of flywheels. Wherein the state data comprises power grid parameters, flywheel parameters and electrical parameters; constructing a dynamic loss prediction model of flywheel energy storage based on the state data; grading is carried out according to the emergency degree of power grid power shortage, and a corresponding flywheel control target is matched; and obtaining an optimal charging and discharging power instruction based on the dynamic loss prediction model and the power shortage of the power grid. Through the processing scheme disclosed by the invention, the economical efficiency and reliability of the flywheel energy storage system are remarkably improved while the stability of the frequency of the power grid is ensured, and a key technical support is provided for safe operation of the power grid under high-proportion access of new energy.

The invention relates to the technical field of motor control in the intelligent power grid industry, and discloses a space vector control method for a twelve-phase permanent magnet synchronous motor flywheel energy storage system, a control circuit of the flywheel energy storage system relates to power electronic components such as various semiconductor field-effect tubes, and the space vector control method is used for high-precision control of a motor. Comprising the steps of S1, twelve-phase space vector decoupling fault-tolerant control, S2, high-order harmonic energy recovery closed loop, S3, quantum annealing parameter optimization layer, S4, flux linkage adaptive observer network construction and S5, 18-dimensional switching vector table construction. According to the scheme, through multi-reference coordinate system transformation and a redundant phase reconstruction algorithm, rapid fault-tolerant response of the twelve-phase motor during a single-phase or two-phase fault is realized, a current path is dynamically recombined during the fault, a negative-sequence current compensation ring is combined, torque ripple is effectively suppressed, and the reliability of the motor is improved under a high-speed charging and discharging working condition. The harmonic distortion rate is detected in real time through the sliding window FFT, the bandwidth of the controller is adjusted, and the problem that the dynamic response of a traditional fault-tolerant strategy is insufficient is solved.

The application discloses a metro flywheel energy storage system with a direct current ice melting function, which comprises a medium voltage looped network, a contact network, a running rail and positive and negative bus lines, and further comprises a metro rectification module and a flywheel energy storage module; the metro rectification module is connected with the positive and negative bus lines; the positive bus line is connected with the contact network, and the negative bus line is connected with the running rail; the flywheel energy storage module is connected with the positive bus line, the negative bus line and the running rail respectively; the flywheel energy storage module is further connected with the contact network through a circuit breaker QF, and the contact network and the running rail are connected through a remote short-circuit switch K3. The application further discloses an ice melting and energy storage method using the metro flywheel energy storage system with the direct current ice melting function. The application has both the direct current ice melting function and the flywheel energy storage charging and discharging function, the two functions are time-multiplexed through switch control, efficient utilization of the equipment is realized, and the performance-price ratio is improved.

The invention relates to the technical field of flywheel energy storage system structure optimization, and discloses a flywheel energy storage system variable thickness flywheel profile optimization method, system, device and medium, and the method comprises the steps: building a dual-target optimization model, and taking the maximum unit mass energy storage density and the minimum maximum centrifugal stress as targets; the geometric boundary of the flywheel, the orthotropic property of the composite material and the lamination process constraint are considered, the reasonable and feasible design is ensured, and the failure states such as interlayer stripping or fiber fracture are reduced. And further parameterizing flywheel thickness distribution by adopting a third-order B-spline function, forming a design parameter space in combination with a fiber laying angle, setting a non-uniform node vector and an adjacent coefficient difference upper limit constraint, and ensuring radial smooth change of the thickness. An optimized data set is generated through finite element simulation based on a parameterized model, and a foundation is laid for physical information neural network training. The method provides a scientific, efficient and reliable design optimization scheme for the flywheel energy storage system, and assists energy transformation and sustainable development.

According to the self-adaptive damping and bionic self-balancing integrated flywheel rotor provided by the embodiment of the invention, due to the fact that the bionic multi-cavity self-balancing module does not need external regulation and control, dynamic unbalance can be compensated in real time, the dynamic unbalance far exceeds a traditional active regulation and control scheme, and vibration aggravation and bearing abrasion caused by unbalance are effectively avoided. The magnetorheological elastomer damping layer can adjust the shear modulus in a self-adaptive mode according to the vibration state, an additional external damping device is not needed, the self-repairing protection layer can conduct in-situ self-repairing on microcracks, and a brand new technical path is provided for engineering application of a flywheel energy storage system with the high rotating speed, the long service life and the high reliability.

The invention relates to a composite vibration isolation foundation structure for a pit integrated environment and a flywheel energy storage system, the composite vibration isolation foundation structure comprises a bearing base plate and a vibration isolation damping module, the bearing base plate is used for being arranged in a pit and used for being arranged on a foundation at the bottom of the pit, and the bearing base plate is used for bearing a flywheel body arranged in the pit; the vibration isolation damping module is used for being arranged between a foundation and the bearing base plate, the vibration isolation damping module comprises a damper and a shock absorber, and the shock absorber is used for supporting the bearing base plate and reducing the inherent frequency of the bearing base plate; one end of the damper is used for being connected with a foundation, the other end of the damper is connected with the shock absorber, and the end, away from the damper, of the shock absorber is connected with the bearing base plate. Or the damper and the shock absorber are both used for being connected between the foundation and the bearing base plate. The composite vibration isolation foundation structure can effectively isolate vibration generated during high-speed operation of the flywheel body so as to prevent the vibration from affecting the precision, the stability and the service life of vibration sensitive equipment.

The invention relates to the technical field of flywheel energy storage, and discloses a harmonic conducted interference suppression method based on flywheel energy storage. The method comprises the following steps: collecting current and voltage signals of a direct current bus side of the flywheel energy storage system in real time, separating fundamental and harmonic components through frequency domain decomposition, and then calculating current and voltage harmonic characteristic parameters; and after comparison with a preset harmonic threshold value, a harmonic suppression reference point is dynamically set, and a progressive suppression signal of which the suppression intensity change rate is adjusted by a slope control module is injected into the reference point. Generating a rotating speed compensation coefficient by combining the coupling relationship between the harmonic characteristic parameter and the flywheel rotor rotating speed, and adjusting the suppression signal slope in real time; the adjusted signal is diffused to the overall system through a chain type conduction mechanism, meanwhile, the harmonic suppression feedback quantity is monitored to update the threshold condition, datum point setting and signal adjustment are repeated until the harmonic characteristic parameters meet the convergence criterion, and stable operation of the system can be guaranteed.

The invention relates to the technical field of data center power supply, and discloses a photovoltaic power supply flywheel energy storage system based on a data center, which comprises a photovoltaic power generation module, a flywheel energy storage module, a power management module and a rotating speed control module. The photovoltaic power generation module collects data through a light intensity sensor, generates a power generation adjustment coefficient in combination with illumination fluctuation characteristics, photovoltaic panel conversion efficiency and an energy storage demand real-time state, and dynamically adjusts output power; the flywheel energy storage module controls acceleration / deceleration of a flywheel rotor according to a power generation power signal, and determines a rotating speed adjustment mode through a light intensity fluctuation index, an energy storage margin proportion and the like; the power management module monitors energy conversion efficiency and optimizes module operation; the rotating speed control module adjusts the rotating speed of the flywheel through a PID algorithm. The system realizes cooperative control of photovoltaic power generation and flywheel energy storage through multi-factor normalization, weighted summation and time decay factor correction, improves the power supply stability and energy utilization rate of a data center, and is suitable for green power supply scenes.

The application discloses a high-integration flywheel energy storage system based on a strong magnetic stator permanent magnet type axial flux motor, and relates to the field of flywheel energy storage systems.The system comprises a strong magnetic stator permanent magnet type axial flux flywheel motor, a high-integration hybrid magnetic suspension bearing and an integrated flywheel rotor, etc.The strong magnetic stator permanent magnet type axial flux flywheel motor comprises a stator and a rotor, and the stator is internally provided with a spiral cooling water channel.The high-integration hybrid magnetic suspension bearing comprises a radial magnetic suspension bearing and an axial magnetic suspension shaft, and is divided into a rotating part and a stationary part.The stationary part is integrated with the stator of the strong magnetic stator permanent magnet type axial flux flywheel motor, the rotating part is embedded in the flywheel rotor together with the rotor of the strong magnetic stator permanent magnet type axial flux flywheel motor, and the flywheel rotor is composed of the rotating part and the stationary part.

The invention discloses a flywheel energy storage system, method and equipment based on an adversarial network algorithm and a medium, and belongs to the technical field of magnetic suspension bearings, and the flywheel energy storage system comprises an HTS static suspension system, an AMB dynamic control system and an axial-radial decoupling integration module; the HTS module comprises a superconducting unit, a cooling unit and a mechanical calculation unit, and non-contact axial supporting of the flywheel rotor is achieved through the superconducting magnetic flux pinning effect. The AMB module comprises an electromagnetic structure unit, a magnetic field calculation unit and a control algorithm unit, and an electromagnetic coil array and a PID (Proportion Integration Differentiation) controller are used for performing rotor radial control; the decoupling module comprises a mechanical coupling unit, a sensor unit and a communication and synchronization unit, a force action range is divided through a dynamic equilibrium equation set, and a displacement sensing network is formed by the laser range finder and the Hall array. The static suspension force, the dynamic stability and the control precision of the hybrid bearing system are improved, and an efficient and reliable solution is provided for bearing application under high-speed rotation and complex working conditions.

The invention relates to the technical field of transient voltage governance, and discloses a control system for a transient voltage governance flywheel energy storage system, which comprises a detection module, a parameter acquisition module, a feature fusion module and an analysis decision module. The detection module identifies transient voltage disturbance and obtains a schedulable flywheel energy storage unit; the parameter acquisition module acquires the real-time rotating speed, the voltage deviation value, the residual energy storage capacity and the transient waveform characteristic parameters of the power grid of the candidate unit; the feature fusion module generates rotation speed, voltage deviation and energy storage capacity fusion features and transient waveform features through multi-scale processing such as time-frequency decomposition and sliding window statistics; and the analysis decision module completes multi-modal correlation analysis and weight distribution based on dynamic modulation network cross attention calculation, and obtains a candidate unit priority coefficient to determine a target unit. Through multi-dimensional parameter fusion and dynamic decision, the precision and real-time performance of transient voltage treatment are improved, and the method is suitable for a power grid transient disturbance treatment scene.

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.

The invention discloses an axial flux motor for flywheel energy storage, which comprises a stator, three-phase double-layer armature windings and paired rotors, the three-phase double-layer armature windings are all arranged on the stator, and the stator is arranged between the paired rotors; each of the paired rotors comprises a rotor iron yoke and a permanent magnet ring, the permanent magnet ring is arranged on the rotor iron yoke, the permanent magnet ring comprises a plurality of permanent magnets, the permanent magnets abut against one another to form the permanent magnet ring, and the magnetizing directions of the permanent magnets corresponding to the paired permanent magnet rings in the axial direction of the axial magnetic flux motor are the same, so that the paired permanent magnet rings form an NN type magnetic circuit structure. The axial magnetic flux motor not only can utilize axial magnetic flux, but also can utilize circumferential magnetic flux, so that the power density of the motor is effectively improved; and a vertical winding structure in the three-phase double-layer armature winding is arranged at the end part of the inner side of a traditional winding, so that copper consumption is reduced while copper is saved, the heat dissipation difficulty of a flywheel energy storage system running in a vacuum environment is reduced, and the overall efficiency of the system is improved.

The utility model belongs to the field of flywheel energy storage, and particularly relates to a flywheel energy storage system for integrally forging a wheel ring and a wheel hub. The upper end cover and the lower end cover respectively cover the upper end and the lower end of the shell; bearings are arranged on the bottom surface of the upper end cover and the top surface of the lower end cover; the longitudinal section of the flywheel rotor is H-shaped; the shell, the upper end cover and the flywheel rotor are made of magnetic materials; the bottom end of the upper connecting shaft is fixed with the top surface of a thin disc in the center of the flywheel rotor; the top end of the upper connecting shaft is connected with a bearing of the upper end cover; the top end of a lower connecting shaft is fixed with the bottom surface of a thin disc in the center of the flywheel rotor; the bottom end of the lower connecting shaft is connected with a bearing of a lower end cover; the driving motor drives the upper connecting shaft or the lower connecting shaft to rotate; the magnetic ring is fixed on the bottom surface of the upper end cover. The flywheel rotor structure adopts an H-shaped integral structure, so that the flywheel rotor is more uniform during heat treatment, the strength of each part of a material is ensured to be consistent, accidents in future use are avoided, and the safety and the reliability of flywheel energy storage products are improved.

The utility model relates to the technical field of power grids, and discloses a horizontal flywheel energy storage system, which is characterized in that a flywheel energy storage module is rigidly or flexibly connected with a rotor of a double-fed motor through a primary connector; a stator of the double-fed motor is electrically connected with an alternating current power grid; the system controller is electrically connected with the flywheel energy storage module, the primary connector and the double-feed motor; the flywheel energy storage module, the first-stage connector and the double-fed motor are all horizontally arranged, and the flywheel energy storage module is sealed in a vacuum mode. By adopting the horizontal arrangement, a larger and heavier flywheel rotor can be supported, so that the rotational inertia of the flywheel rotor is increased, and the capability of providing the rotational inertia for an alternating current power grid by the system is further improved; vacuum sealing is adopted, air resistance of a flywheel rotor of the flywheel energy storage module is reduced, energy conversion efficiency is improved, energy loss caused by air friction is avoided, the service life of the flywheel energy storage module is prolonged, corrosion of external air is avoided, and corrosion and oxidation of the flywheel rotor are reduced.

This invention proposes an adaptive speed-SOC limiting control method for magnetic levitation flywheels oriented towards AGC (Automatic Generation Control). The method includes: acquiring real-time speed and real-time SOC of the flywheel energy storage system; setting speed and SOC thresholds; and classifying the flywheel operating state into three categories based on the real-time speed and SOC, combined with the speed and SOC thresholds, and executing corresponding cooperative limiting control strategies. This invention implements differentiated cooperative limiting control strategies for different states: in normal conditions, it fully responds to AGC commands; when SOC exceeds the limit, it limits the maximum charging and discharging power in the corresponding direction; when both limits are exceeded, charging and discharging in the dangerous direction is prohibited, and only adjustment in the safe direction is allowed. This mechanism solves the problems of speed and SOC control being disconnected in existing technologies, and rigid cutoff upon reaching the threshold. It achieves cooperative judgment and intervention of speed and SOC, maximizing the continuity and response accuracy of AGC frequency regulation while ensuring the mechanical safety of the equipment, and avoiding unnecessary shutdowns or power surges caused by exceeding the limit of a single parameter.

A flywheel energy system includes a set of compound rotor assemblies, wherein each compound rotor assembly includes a set of disks each defined by a radial profile. The radial profile includes: a rim-transitional region defining a circumferential rim and a rim transition; an attachment-driven region and a clearance-driven transition; and a Laval-like region connecting the clearance-driven transition to the rim transition. Between each pair of adjacent disks, an attachment subassembly includes: an alignment pin arranged within a pair of adjacent central bores of the pair of adjacent disks; and a pair of attachment flanges each fastened to an opposite attachment flange in the pair of attachment flanges via a set of inter-flange fasteners and fastened to a disk in the pair of adjacent disks via a set of disk-flange fasteners.

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 flywheel energy storage system supporting method based on data center power switching and belongs to the technical field of power supply of power systems, which comprises the following steps: collecting real-time impedance parameters of each electrical equipment in a power grid through a preset impedance detection node to judge the power supply state of a main power supply and generating power topology state parameters; generating flywheel rotor dynamic torque compensation parameters according to the power topology state parameters and a preset torque threshold value, controlling the output of a preset multi-stage power switching matrix to synchronize phase parameters; and generating power distribution weight parameters based on the synchronized phase parameters and a preset load priority queue and updating the state parameters of the flywheel energy storage system. Through real-time impedance parameter monitoring of the power grid topology state, dynamic adjustment of the flywheel torque compensation parameters and multi-stage power synchronization phase control, and the power weight distribution of the load priority queue, the application can realize millisecond-level response, phase continuous transition and power supply continuity guarantee of key loads in the power supply switching process.

The invention provides a flywheel energy storage permanent magnet synchronous motor stator and rotor end part assembly and a flywheel energy storage system. The end part assembly comprises a stator end part, a rotor end part and a conical air gap, the stator end comprises a first conical surface; the rotor end comprises a second tapered surface; the first conical surface and the second conical surface form a conical air gap at the concentric position of the stator and the rotor, and the conical air gap is designed in an angle expanding mode from the center to the outside and used for generating radial induction lifting electromagnetic force through the electromagnetic induction principle. Through the design of the conical air gaps at the end parts of the stator and the rotor, radial lifting force is generated by electromagnetic induction, the bearing load is shared to reduce friction loss, and meanwhile, the rotor rigidity is enhanced to suppress resonance, so that the efficiency and reliability of the flywheel energy storage motor are improved.

The invention discloses a hybrid energy storage frequency modulation control method based on dynamic constraint and multi-objective optimization, and belongs to the technical field of energy storage frequency modulation. Comprising the following steps: S1, acquiring a hybrid energy storage AGC frequency modulation power instruction; s2, constructing a hybrid energy storage system coordination control model based on the hybrid energy storage AGC frequency modulation power instruction, and obtaining charging power and discharging power of a flywheel energy storage system and a battery energy storage system; s3, constructing an energy storage unit charging and discharging coordinated optimization model based on the charging power and the discharging power in the S2, and obtaining the charging power and the discharging power of the energy storage unit; and S4, evaluating a coordinated optimization result based on the evaluation index to obtain a hybrid energy storage frequency modulation control scheme. According to the invention, the service life loss of the battery energy storage system is effectively reduced, the continuous operation capability of flywheel energy storage is improved, the energy loss of the system is reduced, the SOC balance between the energy storage units is maintained, and the comprehensive performance of the hybrid energy storage system participating in AGC frequency modulation is obviously improved.

The application relates to the technical field of wind power generation, in particular to a floating front-end speed regulation wind turbine unit stability control method and system. The method comprises the following steps: collecting wind speed data, optimizing wind wheel aerodynamic efficiency, obtaining and speed processing first variable speed mechanical energy to obtain second variable speed mechanical energy; driving the planet carrier to revolve around the sun based on the second variable speed mechanical energy, generating wind wheel power feedback and calculating minimum starting power demand; generating and executing initial electric energy distribution instructions according to the minimum starting power demand, obtaining starting process state feedback; switching the flywheel energy storage system to the normal operation mode based on the feedback, outputting compensation mechanical power to synthesize total mechanical power; driving the sun gear based on the total mechanical power, ensuring that the generator rotor operates at a constant speed, and performing grid connection operation. The application effectively improves the starting reliability, operation stability and power generation efficiency of the floating wind turbine unit.

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 invention discloses a control method and device for coupling a flywheel energy storage system with a fused salt energy storage system to cooperatively participate in power grid frequency modulation, a medium and a product, and relates to the technical field of energy storage control. Determining power instructions of the flywheel energy storage system and the fused salt energy storage system participating in primary frequency modulation; based on the secondary frequency modulation signal instruction of the power grid and the real-time load and rated power of the thermal power generating unit, power instructions of the flywheel energy storage system and the fused salt energy storage system participating in secondary frequency modulation are determined; and based on the primary frequency modulation signal instruction, the secondary frequency modulation signal instruction, the real-time load, the rated power, the power instruction participating in primary frequency modulation and the power instruction participating in secondary frequency modulation of the thermal power generating unit, comprehensive frequency modulation power signals of the flywheel energy storage system and the fused salt energy storage system are determined. The flywheel energy storage system is coupled with the fused salt energy storage system to cooperatively participate in control of power grid frequency modulation.