760 results about "Flywheel energy storage" patented technology

The invention discloses a flywheel energy storage system control method based on data center photovoltaic power supply, and belongs to the technical field of power system and new energy grid-connected control, and the method comprises the steps: obtaining the output prediction data of photovoltaic power generation, the real-time load power, the voltage fluctuation parameter of a commercial power grid, and the real-time rotating speed state of flywheel energy storage; generating a power gap predicted value by taking the real-time rotating speed state of flywheel energy storage as a dynamic constraint variable; generating a flywheel commercial power cooperative control strategy according to the commercial power voltage fluctuation parameter; the temperature change rate of the flywheel motor is detected in real time, and a control instruction is generated; and synchronously sending the control instruction to the photovoltaic inverter and the flywheel motor, adjusting the parameters of the photovoltaic inverter and the flywheel rotating speed response data, and dynamically updating the control parameter set. According to the invention, a dual adjustment mechanism of flywheel rotating speed dynamic constraint and voltage fluctuation ratio weight distribution is adopted, and a temperature gradient harmonic collaborative suppression strategy is combined, so that millisecond-level power compensation response can be realized, the power grid dependence degree is reduced, and the service life of an energy storage system is prolonged.

The invention relates to the technical field of data center energy management, and discloses a flywheel energy storage system control system for data center computing power load energy recovery, which comprises an energy storage unit, a load monitoring unit, a flywheel control unit and an energy distribution unit. The energy storage unit is provided with a plurality of groups of flywheel energy storage devices capable of charging / discharging; the load monitoring unit monitors load data by covering key nodes of computing power equipment through a power sensor; the flywheel control unit collects flywheel rotating speed and power grid frequency fluctuation data; and the energy distribution unit decides charging and discharging based on load data, establishes a load and frequency coordinated alternating control strategy, and dynamically adjusts and predicts the running state of the flywheel. The system adopts time sequence synchronous control, the energy distribution unit comprises multiple modules, the alternate controller supports dual-mode switching and parameter optimization, and the flywheel unit adopts an annular redundancy or star-shaped concentrated structure. The system realizes efficient recovery of computing power load energy and flywheel energy storage optimization scheduling, and improves the energy utilization rate of a data center and the stability of a power grid.

The invention discloses a collaborative optimization scheduling method and system considering energy storage frequency modulation reserve. The method comprises the following steps: acquiring basic data of a power system; based on the basic data, a collaborative optimization scheduling model considering energy storage frequency modulation reserve is established, and the collaborative optimization scheduling model takes the minimum sum of the coal consumption cost, the unit start-stop cost and the wind curtailment cost of the thermal power generating unit as a scheduling target under multiple constraint conditions; the multiple constraint conditions comprise a lithium battery power constraint, a charging and discharging state constraint, an SOC constraint, a frequency modulation response constraint, a frequency safety constraint, a frequency modulation standby constraint, a flywheel energy recovery constraint, a thermal power generating unit operation constraint and a power balance constraint; solving the collaborative optimization scheduling model to obtain an optimal scheduling scheme of the power system; by comprehensively utilizing the advantages of a traditional unit, flywheel energy storage and lithium battery energy storage, the safety and operation economy of the system during frequency disturbance are improved.

The invention provides a steam extraction energy storage and heat energy storage integrated regulation control method and system, and relates to the technical field, and the method comprises the steps: building a digital twinborn model of a steam extraction energy storage and heat energy storage integrated system, and respectively obtaining corresponding data; establishing a multi-objective optimization model based on the collected data; solving the multi-objective optimization model by using an improved multi-objective differential evolution algorithm in combination with an adaptive variation strategy and a non-dominated sorting mechanism to obtain an optimal adjustment strategy; on the basis of the optimal adjusting strategy, the opening degree of a steam extraction valve of each stage of steam extraction point is adjusted in real time through a distributed control system, and the steam extraction flow is controlled; the inflation power and the deflation power of the compressed air energy storage unit are dynamically adjusted, and meanwhile the charging and discharging power of the flywheel energy storage unit is controlled; the heat charging and discharging rate of the phase change material heat storage unit is adjusted in a self-adaptive mode, and meanwhile the heat charging and discharging flow of the fused salt heat storage unit is controlled.

The invention relates to the technical field of comprehensive application of renewable energy sources and hydrogen energy, in particular to a wind-solar-hydrogen multi-energy complementary intelligent scheduling platform. According to the technical scheme, the wind-light-hydrogen multi-energy complementary intelligent scheduling platform comprises a wind-light power generation unit which monitors wind power and photovoltaic power fluctuation in real time; the hybrid energy storage unit comprises a super capacitor and a flywheel for energy storage and respectively responds to millisecond-level and second-level power fluctuations; the hydrogen energy subsystem comprises an electrolytic hydrogen production device, a hydrogen storage tank and a fuel cell and responds to minute-level power scheduling; and the multi-time scale controller is configured to execute millisecond-level, second-level and minute-level cooperative control and dynamically match the wind-light fluctuation and the hydrogen energy response speed. According to the method, through multi-time scale dynamic cooperative control, the matching problem between the wind-solar power generation volatility and the hydrogen energy response lag is effectively solved, and seamless connection between second-level high-frequency fluctuation suppression and minute-level energy scheduling is achieved.

The invention discloses a hydrogen cooling superconductive flywheel composite energy storage system, which relates to the technical field of new energy storage and comprises a superconductive flywheel energy storage module, a lithium battery energy storage module, a power conversion module, an intelligent control module, a cooling sub-module and a hydrogen energy recovery module, by combining the quick response characteristic of the superconducting flywheel and the high energy density of the lithium battery, the superconducting flywheel can realize quick energy storage and release by utilizing the friction-free characteristic of the superconducting flywheel, a cooling sub-module and a hydrogen energy recovery module are used, the cooling requirement of the superconducting flywheel is ensured, and meanwhile, energy recovery can be carried out; by utilizing the characteristic of high energy density of the hydrogen battery, the energy storage capacity of the composite energy storage system is further improved, and the limitation of a single energy storage technology on power density and energy density can be effectively solved through the hybrid energy storage system; and more reliable and efficient energy storage support is provided for the fields of power grid peak regulation, renewable energy source grid connection, electric automobiles and the like.

The invention discloses a control system and method for a thermal power generating unit and flywheel energy storage to cooperatively participate in power grid frequency modulation and a power grid frequency modulation method. According to the method, a low-pass filtering algorithm is abandoned, a tracking differentiator is used for decomposing a primary frequency modulation instruction of the thermal power generating unit, and decomposed low-frequency power components are distributed to the thermal power generating unit; high-frequency power components are distributed to the flywheel for energy storage, action times and output abrasion of the thermal power generating unit are reduced, and the service life of the unit is prolonged. A gain coefficient which adaptively changes along with the state of charge (SOC) and frequency deviation is introduced into the decomposed high-frequency power component, so that accurate matching requirements are facilitated, the energy utilization efficiency is improved, the frequency fluctuation of a power grid is better stabilized, and the quality of the power grid is improved; and meanwhile, a Logistic function for preventing the flywheel from being overcharged and overdischarged is introduced to restrain the theoretical response power of flywheel energy storage, deep charging and discharging of the flywheel are avoided, and therefore the loss of the flywheel is reduced.

The invention relates to the technical field of flywheel energy storage, in particular to a flywheel energy storage management system for renewable energy integration, which comprises a state monitoring module, an energy access module, a material fatigue prediction and optimization module and an energy scheduling module, the state monitoring module collects the operation state of the flywheel energy storage unit in real time. The energy access module receives input power from renewable energy sources; the material fatigue prediction and optimization module generates an operation optimization strategy when a fatigue risk is predicted; and the energy scheduling module performs dynamic energy distribution among the flywheel energy storage unit, the power grid and the standby energy storage unit, and formulates an optimal energy flow strategy in combination with historical load data and real-time input power. According to the invention, the service life of the flywheel energy storage unit is greatly prolonged, and the overall safety and reliability of the system are improved.

The invention relates to the technical field of data center power supply, and discloses a transient voltage treatment control method based on a data center flywheel energy storage system. The method comprises the following steps: firstly, acquiring three-phase voltage, current and frequency signals of a power supply bus of a data center and rotating speed and energy storage power signals of a flywheel energy storage system, and calculating a transient voltage characteristic matrix; then, a dynamic threshold value is quantified, a multi-layer cascade evaluation network structure is constructed to carry out voltage transient evaluation, and energy storage control evaluation parameters are generated; then establishing a transient constraint function, and calculating a dynamic stability boundary of the flywheel energy storage system; and finally, iteratively optimizing energy storage control parameters according to the result to obtain a flywheel energy storage power regulation sequence. Through closed-loop adjustment, energy storage power is dynamically adjusted according to load requirements and voltage deviation, transient fluctuation of power supply bus voltage is effectively treated, and power supply stability and reliability of the data center are improved.

The invention relates to the technical field of power supply management, in particular to a flywheel energy storage and storage battery hybrid UPS coordination management system and method, and the method comprises the steps: collecting the operation state data of a flywheel energy storage unit and a storage battery unit according to a preset collection frequency; predicting flywheel energy storage and energy supply control input of a storage battery in a future time window based on the acquired running state data of the flywheel energy storage unit and the storage battery unit, and generating a corresponding control time sequence; acquiring a power supply overall efficiency parameter in the corresponding time window under the corresponding control time sequence; the control time sequence is optimized by analyzing changes of power supply overall efficiency parameters, and the charging and discharging processes of the flywheel energy storage unit and the storage battery are managed in a coordinated mode.

The invention relates to the technical field of flywheel energy storage, and discloses a flywheel energy storage and storage battery hybrid UPS control method, which comprises the steps of planning a hybrid energy storage control process based on load characteristics and energy storage equipment state parameters, and determining a dynamic adjustment algorithm and a cooperative control strategy; determining a working mode according to the real-time load demand and the energy storage equipment state parameter; generating a hybrid energy storage control strategy set and determining an execution sequence; generating a parameter configuration list and a strategy scheme list of each mode; and performing correlation matching to generate an overall control scheme. The invention further relates to the contents of dynamic control boundary determination, specific strategies in different working modes, control parameter updating, switching rule presetting, hybrid energy storage control database establishment and the like. According to the method, efficient cooperation of the flywheel and the storage battery is achieved, the adaptability of the UPS system to a load scene and the power supply reliability are improved, the working state of energy storage equipment is optimized, the service life of the storage battery is prolonged, and long-term stable operation of the system is guaranteed.

The invention relates to a flywheel energy storage UPS system and method using a split transformer, and the system comprises a standby generator set which is disposed at a power supply end and is connected in parallel with a commercial power supply end, and when the commercial power is abnormal, the standby generator set can serve as a power supply to supply power to a load; one end of the switch control assembly is connected with the commercial power and the standby generator set, the other end of the switch control assembly is connected with a load, and the commercial power, the standby generator set and the load can be connected or disconnected; the output end of the flywheel energy storage device is connected to a power supply line between the switch control assembly and the load and can serve as a power source to supply power to the load. The number of the flywheel energy storage devices is more than two, and the more than two flywheel energy storage devices are connected to a power supply line through the split transformer. Compared with a traditional on-line low-voltage UPS system, the on-line low-voltage UPS system has the advantages that by using the backup flywheel energy storage device and the split transformer, the operation efficiency is as high as 99%, and the system loss is greatly reduced.

The invention discloses a thermal power generating unit, flywheel and compressed air hybrid energy storage system and an operation method, and relates to the technical field of flexibility improvement of novel energy storage and thermal power systems. The system comprises a flywheel energy storage subsystem, a compressed air energy storage subsystem, a thermal power collaborative heat exchange system, a flywheel-CAES switching coupling module and an intelligent control system. The flywheel energy storage subsystem is responsible for millisecond-level frequency modulation response, the compressed air energy storage subsystem provides minute-level stable output, and the flywheel energy storage subsystem and the compressed air energy storage subsystem cooperatively work through an intelligent control system to realize a composite regulation mode of'fast response-high capacity '; a compressed air side is coupled with a thermal power plant turbine steam extraction system, a boiler flue gas system and a condensed water system to improve the energy release efficiency; the flywheel side interacts with a power grid in real time through a bidirectional converter, and rapid frequency support is achieved. The system has the quick response capability and the long-time energy supporting capability, the frequency modulation and peak regulation performance of the thermal power generating unit is remarkably improved, and the system has high engineering popularization value and application prospects.

The invention belongs to the technical field of flywheel energy storage, and particularly discloses a flywheel energy storage and flywheel phase modifier cooperative frequency support control method, which comprises the following steps: if it is detected that power grid frequency fluctuation exceeds a preset range, preferentially triggering a flywheel phase modifier in an inertia response stage to provide instantaneous inertia support through rotation kinetic energy so as to slow down a power grid frequency falling speed; starting the flywheel energy storage system to perform high-frequency charging and discharging to smooth power grid frequency fluctuation; in the primary frequency modulation stage, the output power of the flywheel phase modifier and the flywheel energy storage system is dynamically and coordinately distributed based on the real-time power grid frequency and voltage deviation, and the power grid frequency is recovered and stabilized by taking the flywheel energy storage system as a main part and the flywheel phase modifier as an auxiliary part. According to the invention, cooperative frequency support control of flywheel energy storage and the flywheel phase modifier when a power grid breaks down suddenly is realized.

The invention discloses a capacity evaluation method for flywheel energy storage and storage battery hybrid UPS configuration, and belongs to the technical field of capacitor application and hybrid energy storage systems, and the method comprises the steps: obtaining a preset load fluctuation parameter, a flywheel rotating speed parameter and a real-time charge state parameter of a storage battery, and generating a dynamic load feature vector; according to the dynamic load feature vector, calculating a dynamic coupling parameter of flywheel mechanical inertia and storage battery chemical energy attenuation; based on the dynamic coupling parameter, generating a cooperative capacity distribution weight of the flywheel and the storage battery; according to the cooperative capacity distribution weight, adjusting a preset rectifier duty ratio parameter to obtain an energy storage charging and discharging strategy; and performing simulation verification on the energy storage charging and discharging strategy, and outputting a final capacity evaluation result. A dynamic coupling parameter and a closed-loop simulation verification mechanism are adopted, flywheel inertia and storage battery attenuation characteristics can be accurately adapted, and the energy distribution proportion is optimized to improve power supply quality and prolong the service life of equipment.

The invention relates to the technical field of data center energy storage and power supply, and discloses a flywheel AFE energy storage and power supply system for a data center, which comprises a flywheel energy storage unit, an AFE control module, a hierarchical energy scheduling module, a dynamic balance adjustment module and a feedback optimization module. The flywheel energy storage unit constructs a multi-stage energy buffer topology through a rotating speed monitoring node and a kinetic energy conversion network; the AFE control module realizes steady-state and transient-state control by using a multi-mode switching link of the vector modulation unit and inhibits harmonic waves in combination with the direct-current bus compensation unit; the hierarchical energy scheduling module generates a bus voltage reference strategy through a dynamic coordination model of the master control coordination node, and load power supply priorities are sorted through a dynamic priority distribution unit. The dynamic equalization adjustment module realizes power phase synchronization compensation and modulation frequency correction, and the feedback optimization module corrects a power supply strategy based on a closed loop of a bus harmonic evaluation network. The system improves the power supply stability, efficiency and reliability of the data center.

The invention discloses a power system frequency modulation method and system based on flywheel energy storage auxiliary wind power, a flywheel energy storage system is equivalent to a first-order inertia link, an inertia time constant of the flywheel energy storage system is dynamically adjusted, a virtual damping coefficient is optimized in real time in combination with a fuzzy logic controller, and the stability of power grid frequency is remarkably improved. When the frequency of the power grid fluctuates, the flywheel energy storage system can respond quickly, the frequency modulation power close to the rated frequency can be output in an extremely short time, and the steady-state frequency deviation is strictly controlled in an extremely small range. Meanwhile, the fuzzy logic is used for dynamically correcting the power instruction, and the problem of frequency modulation instruction tracking errors caused by wind power output randomness is effectively solved. Besides, after frequency modulation is finished, the damping coefficient is dynamically adjusted through a fuzzy decision mechanism, the flywheel rotating speed recovery time is greatly shortened, secondary frequency disturbance caused by rotating speed lag is avoided, and the recycling efficiency of flywheel energy storage in a continuous frequency modulation scene is ensured.

The invention belongs to the technical field of flywheel energy storage, and discloses a flywheel energy storage system and a braking method and starting method thereof.The motor of the flywheel energy storage system is connected with a rotating shaft, a plurality of rotor permanent magnets are evenly arranged on the side wall of a rotor in the circumferential direction of the rotor, one end of each rotor permanent magnet is connected with the rotor, and the other end of each rotor permanent magnet extends towards the inner wall of a shell; a plurality of first electromagnets are arranged at the positions, opposite to the side wall of the rotor, of the shell and are uniformly distributed in the circumferential direction of the rotor; all the first electromagnets are connected to a first electromagnet controller, and the first electromagnet controller is used for controlling the first electromagnets to generate magnetism or lose magnetism; the net distance between the projections of every two adjacent first electromagnets on the side wall of the rotor is larger than the length of the projection of a single rotor permanent magnet on the side wall of the rotor. The flywheel energy storage system is braked in a non-contact mode through magnetic force, the failure situation is not prone to occurring, and reliability is high.

The invention relates to the technical field of voltage governance, in particular to a data center transient voltage governance flywheel energy storage system which comprises a disturbance moment identification module, a load sudden change judgment module, a capacity correction distribution module, a scheduling sequence adjustment module and a state change tracking module. And analyzing the voltage curve of the flywheel energy storage monitoring node in each time period. According to the method, the coupling relation between voltage disturbance and load change is synchronously captured through multi-dimensional data, the influence of the server running dynamic state on the flywheel energy state is excavated in real time, the energy distribution structure is adjusted in combination with the friction loss trend, and the flywheel priority is dynamically optimized through load proportion fluctuation and the main loop state. According to the method, node energy fluctuation rapid screening and change tracking are realized, the response strategy of the flywheel energy storage system to short-time voltage disturbance is refined, the pertinence and elasticity of energy storage scheduling in a data center operation scene are improved, and the stability level and risk protection capability of the whole power supply system are enhanced.

The invention belongs to the technical field of optical storage collaborative optimization, and discloses a distributed optical storage system collaborative optimization method, system and device and a medium, and the method comprises the steps: building a distributed optical storage system structure based on battery energy storage and flywheel energy storage, establishing a hybrid energy storage degradation cost function according to the battery energy storage actual cycle life and flywheel energy storage rated power information; and constructing a distributed optical storage system collaborative optimization model by using the hybrid energy storage degradation cost function, solving the distributed optical storage system collaborative optimization model based on a solving rule in which hybrid energy storage participates, and generating a power distribution strategy according to a solving result. According to the method, a power distribution strategy of battery energy storage and flywheel energy storage in hybrid energy storage is obtained in three scenes of peak regulation, frequency modulation and multifunctional multiplexing, and an economic operation target in the scenes of peak regulation, frequency modulation and multiplexing optimization of the power distribution network is realized through source-load-storage collaborative optimization.

The invention relates to the technical field of power systems, and discloses a flywheel energy storage assisted thermal power generating unit collaborative frequency modulation control method, which comprises the following steps: extracting dominant dynamic characteristics based on state matrix eigenvalue analysis through a joint dynamic model, and setting layered optimization time granularity according to the dominant dynamic characteristics; aiming at the difference between the thermal power slow dynamic characteristic and the flywheel fast dynamic characteristic, optimization objective functions of a thermal power layer and a flywheel layer are respectively designed, robust consistency constraint is introduced, and multi-time scale optimization instruction iteration generation is realized through an asynchronous coordination algorithm. The system monitors the frequency change rate of a power grid in real time, dynamically adjusts virtual inertia parameters of the flywheel and generates dynamic compensation power, and finally fuses the coordinated reference instruction and the dynamic compensation amount to form an execution instruction. According to the scheme, the frequency dynamic stability in the new energy power grid frequency modulation process can be remarkably improved, and meanwhile, the frequency modulation equipment loss and the sustainable operation capability of the energy storage system are balanced.

The invention relates to the technical field of power grid side energy storage, in particular to a power grid side flywheel energy storage stationing method considering source grid requirements, and aims to solve the problem of how to improve the adjusting effect of power grid side shared energy storage in the peak period of power utilization according to the source grid requirements. The invention provides a power grid side flywheel energy storage point distribution method considering a source network demand. The point distribution method comprises the following steps: determining pre-site selection data of power grid side shared energy storage according to an energy storage demand of a target area and a topological structure of cable equipment in the target area; acquiring cable equipment corresponding to the corrected site selection data, and calculating an energy storage demand corresponding to the corrected site selection data according to historical electricity consumption of the cable equipment; and obtaining a power supply unit in the target area, planning all the corrected site selection data according to the power supply capability and the energy storage demand of the power supply unit, and obtaining the actual distribution point of the power grid side shared energy storage.

The invention discloses an energy self-adaptive regulation and control method of a hydrogen fuel power generation flywheel UPS system, and belongs to the field of uninterruptible power supply and energy storage system control. The method comprises the steps of predicting system load requirements and dynamically generating layered power supply instructions; starting, stopping and output of the hydrogen fuel generator set and the flywheel energy storage device are cooperatively regulated and controlled, and closed-loop correction is carried out on power supply parameters; and in combination with life equilibrium state evaluation of key components, electrolytic hydrogen production and storage are completed as required by using redundant electric energy. According to the invention, a dynamic scheduling decision based on load prediction, hydrogen-flywheel hybrid energy storage collaborative optimization and an energy and state closed-loop feedback control technology are adopted, so that self-adaption and efficient management of UPS system energy and optimal configuration of multi-stage energy storage resources can be realized; and the dynamic response performance, the energy utilization efficiency and the overall power supply reliability of the uninterruptible power supply system are remarkably improved.

The invention relates to the technical field of power management, in particular to a flywheel energy storage and storage battery hybrid UPS system for a data center, which comprises a load identification module, a disturbance correction module, a scheduling screening module, a time reconstruction module and an instruction updating module. According to the method, the current rotating speed and the output current of the flywheel are obtained, slope change trend analysis is executed, the impact characteristic generated when the load is started can be recognized in advance, and the transient instability risk caused by large-current impact is avoided. And carrying out cross analysis on the original access time sequence of the load and the power disturbance response of the power supply side, so that the load access behavior with concentrated original time sequence and violent current fluctuation is orderly expanded in the time domain. The power supply parameters of the air conditioner group are extracted by the flywheel in the steady-state operation period to serve as the reference, interval adaptation judgment is conducted on the power supply parameters and the operation characteristics of the operation and maintenance equipment to be connected, the equipment with high stability is scheduled preferentially, and the balance and controllability of overall scheduling response are improved.

The invention discloses a power grid frequency modulation method based on flywheel energy storage and electrochemical energy storage. The method comprises the following steps: S1, receiving an AGC instruction issued by an AGC dispatching center; s2, preferentially responding to the frequency modulation demand through flywheel energy storage, and adjusting the rotating speed of the flywheel in real time based on the instantaneous power output capability and the residual electric quantity of the flywheel so as to compensate for the high-frequency small-amplitude power deviation; s3, when the flywheel energy storage power or energy is insufficient, battery energy storage supplements response, the charge and discharge depth of the battery is limited according to the charge state of the battery, and the service life is prolonged; and S4, combining the actual ramp rate of the thermal power generating unit, dynamically distributing the output of the energy storage system, and forming a thermal power-hybrid energy storage combined frequency modulation model. The frequency modulation performance index is improved; through instantaneous response of flywheel energy storage and continuous support of a battery, the Kp value is improved from 3.7 to more than 4.2 by combining a frequency modulation system; and the service life of the battery is prolonged, and the replacement cost and the comprehensive cost are reduced by limiting the charge-discharge depth (the SOC range is 20%-90%) of the lithium battery and reducing the high-frequency charge-discharge times of the lithium battery.

The invention relates to the technical field of electric energy storage, and particularly discloses a flywheel energy storage frequency modulation system and a frequency modulation method.According to the real-time rotating speed, power upper and lower limits and residual energy of each flywheel energy storage unit, the output weight is calculated and iteratively distributed, a preliminary power instruction is generated, and saturation amplitude limiting and vacancy redistribution are executed; and outputting a final power instruction to execute control. When the power of the flywheel energy storage units is saturated or the flywheel energy storage units are in fault off-network, the fault flywheel energy storage units are automatically removed, the vacancy of the flywheel energy storage units is smoothly distributed to the rest flywheel energy storage units again, the output weight of the flywheel energy storage units is recovered by soft start when the fault flywheel energy storage units are recovered, the array output is ensured to be continuous and stable, and the energy consumption of each flywheel energy storage unit is more balanced. And the extreme condition that one flywheel energy storage unit is over-discharged while the other flywheel energy storage unit is almost immovable is avoided, so that overload tripping is avoided, and the service life of equipment is prolonged.

The invention relates to a flywheel energy storage motor structure optimization method and device based on an improved hedera helix algorithm. The method comprises the following steps: acquiring upper and lower limits of slot depth, upper and lower limits of slot width and cogging torque of the flywheel energy storage motor; taking a peak-to-peak value calculation formula of the cogging torque as a target function; each individual is set to comprise two dimensions of groove depth and groove width, the fitness of each individual is a value of an objective function, and an initial population is obtained through cubic chaotic mapping in a solution space; the growth rate and the fitness of each individual are calculated under the current iteration times, and the individual with the minimum fitness is selected as the current optimal individual; calculating the temporary position of the corresponding individual, correcting the temporary position by using the adjustment vector to obtain a corrected position, updating according to the corrected position, and calculating the fitness of each individual after the position is updated; and when iteration is ended, selecting the groove depth and groove width corresponding to the individual with the minimum fitness from the individuals after position updating as optimal solutions of the optimization variables. The method can improve the performance of the flywheel energy storage motor.

The embodiment of the invention provides a hybrid energy storage thermal power generating unit frequency modulation strategy and system based on hierarchical adaptive control, and the strategy comprises the steps: detecting the reserve capacity and hybrid energy storage charge state of a thermal power generating unit in real time, and obtaining an automatic power generation control instruction, obtaining interregional tie line exchange power and system frequency deviation, and calculating a regional control deviation frequency modulation instruction; the outer layer control is based on the relation between the residual energy of the hybrid energy storage system and a hybrid energy storage distribution scaling factor K, and self-adaptive distribution is carried out on a power grid real-time area control deviation frequency modulation instruction between the thermal power generating unit and the hybrid energy storage system; the inner layer control decomposes a regional control deviation signal distributed to the hybrid energy storage system between flywheel energy storage and battery energy storage, and calculates a rated output power instruction of each energy storage; a battery energy storage unit is divided into a charging sub-unit and a discharging sub-unit, and when any sub-unit reaches a state-of-charge boundary, a charging state and a discharging state are switched; and outputting the frequency modulation power instruction to the energy storage converter.

The invention discloses a distributed light storage and charging integrated system, which comprises a photovoltaic power generation unit, an energy storage unit, a charging unit, a power grid interface unit, an energy management controller and a direct current bus, the photovoltaic power generation unit comprises a DC / DC converter, and the photovoltaic power generation unit is connected with the DC bus through the DC / DC converter; the energy storage unit comprises a lithium ion battery pack, a flywheel energy storage device, a bidirectional DC converter and a flywheel controller. The lithium ion battery pack and the flywheel energy storage device are connected to the DC bus through the bidirectional DC converter and the flywheel controller respectively. The charging unit comprises at least one direct-current quick charging pile, at least one alternating-current slow charging pile and a DC / AC inverter, the direct-current quick charging pile is directly connected with the direct-current bus, and the alternating-current slow charging pile is connected with the direct-current bus through the DC / AC inverter; the power grid interface unit comprises an AC / DC converter and is connected with the DC bus through the AC / DC converter. According to the invention, through collaborative design of a modular hardware architecture and an intelligent time-sharing strategy, comprehensive improvement of economy, reliability and functionality of the system is realized.

The invention discloses a dual-motor dual-rotor flywheel energy storage device which comprises a shell which is arranged in a sealed mode. The flywheel is connected with a motor and arranged on the inner wall of the shell, and the flywheel is arranged to be in a split type; the first wheel body is arranged right above the second wheel body, so that the axial thickness of the flywheel is increased, the energy storage capacity of the whole device is improved, meanwhile, the problem of insufficient quenching depth caused by a flywheel with a large axial size can be solved, and the flywheel is arranged into a split type, so that the axial thickness of a forge piece can be reduced, and the hardenability is improved. The two groups of motors are respectively connected with the first wheel body and the second wheel body, so that the heat dissipation areas of the stators and the rotors in the motors are increased, and the problem of heat dissipation caused by the increase of the structural sizes of the stators and the rotors of the motors due to higher motor power is solved.