2213results about "Electrical storage system" patented technology

The invention relates to a regional power distribution network multi-time scale cooperative control method based on heterogeneous resource coupling, and the method comprises the steps: constructing a cloud-edge-end hierarchical autonomous operation framework which comprises a cloud layer, an edge layer and a terminal layer, the edge layer is used for rolling correction of a day-ahead scheduling plan and generation of a control instruction, and the terminal layer is used for real-time response control; and based on a source-network-load-storage interaction model, executing a multi-time scale collaborative optimization strategy in a cloud-edge-end hierarchical autonomous operation framework, and correspondingly controlling the working state of each device in the regional power distribution network. Compared with the prior art, the method can achieve the dynamic optimization matching of distributed energy, flexible load and energy storage, improves the flexibility and intelligent level of a regional power distribution network, improves the consumption rate of renewable energy sources, reduces the operation cost, and guarantees the power supply reliability and electric energy quality.

The invention relates to the technical field of micro-grid energy optimization, in particular to a distributed federal reinforcement learning-based hydrogen-containing micro-grid energy scheduling method, which comprises the steps of constructing a multi-region hydrogen-containing micro-grid system model, designing a state space, an action space and a reward function of an intelligent agent, constructing an Actor-Critic network and an experience pool, and completing environment initialization. The intelligent agent inputs the operation state of the equipment into the Actor network, updates the state of the equipment according to the output action, verifies the constraint and outputs a reward value; tuples are extracted from the experience pool to update local network parameters, and the exploration rate is updated regularly; when a federation interaction period is reached, exchanging Critic network parameters and updating federation parameters; and when the training round arrives, outputting an equipment operation plan, deploying the model to the local hydrogen-containing micro-grid in the island mode, and outputting an equipment output value. According to the scheme, strategy sharing and learning collaboration are realized through neighborhood collaboration and local communication among the regional intelligent agents, so that dependence on a central node is avoided.

The invention discloses an energy efficiency improving method and device for a slope type gravity energy storage system, and relates to the technical field of electric energy storage systems. The method and device for improving the energy efficiency of the slope type gravity energy storage system comprise the following steps that S1, energy storage operation data are obtained through multi-source sensor fusion, and data cleaning and normalization processing are conducted on the energy storage operation data; s2, extracting a multi-dimensional state factor, carrying out quantitative evaluation on the operation state of the energy storage unit, constructing a state grading mechanism based on an evaluation result, and generating an operation state label; s3, calling a running state label to screen candidate units, constructing a scheduling priority ranking index, and dynamically allocating tasks and adjusting an execution sequence according to the index; and S4, analyzing structural wear and energy consumption load characteristics, establishing a scheduling correction mechanism, and dynamically adjusting a scheduling priority ranking index. The problem that the scheduling self-adaption cannot be realized according to the load, loss and wear difference of each unit in the parallel operation process of a plurality of energy storage units is solved.

The invention belongs to the field of power system operation and control, and particularly relates to an operation control method for a wind-light hydrogen storage multi-energy complementary system, which comprises the following steps: performing empirical mode decomposition on an original output sequence to obtain an IMF component, training parameters by combining a hidden Markov chain model and a forward-backward algorithm and solving an optimal state sequence, and fusing a predicted value by using Bayesian estimation to obtain an optimal state sequence; outputting a wind and light output and load demand global prediction value; by taking the minimum comprehensive operation cost, the minimum carbon emission intensity and the minimum power supply shortage rate as targets, obtaining equipment, power balance and hydrogen storage capacity constraints through a constraint verification algorithm, and constructing a multi-target optimization model; a scene trigger function identifies four types of typical scenes, a chaos particle swarm optimization algorithm is improved to solve a model, and density peak clustering is carried out to obtain a global scheduling scheme containing output of an electrolytic cell and a fuel cell and energy storage charge and discharge power. According to the invention, through scene adaptive optimization and intelligent clustering screening, the randomness and volatility of wind and light output are dealt with.

The invention belongs to the technical field of wind and light hydrogen storage resource allocation, and discloses a wind and light hydrogen storage scheduling method based on a sparrow search algorithm and related equipment. The wind-solar hydrogen storage scheduling method based on the sparrow search algorithm comprises the steps of constructing a wind-solar hydrogen storage operation day-ahead profit model according to a scheduling target of a wind-solar hydrogen storage system, obtaining a profit maximization objective function through the wind-solar hydrogen storage operation day-ahead profit model, and solving the profit maximization objective function by adopting the sparrow search algorithm. Obtaining a globally optimal solution, and scheduling the wind and light hydrogen storage system according to the globally optimal solution; the method can overcome the defects that in the prior art, the optimization speed is reduced during optimization scheduling, the randomness of an optimization scheduling result is high, and local optimum is likely to happen.

The invention relates to an energy storage system protection method and device, an energy storage system, equipment and a storage medium. The method comprises the following steps: acquiring a first communication state from a monitoring background to a system controller in the energy storage system, a first communication state from each battery management controller to the monitoring background, and a first communication state from each battery management controller to the monitoring background through the system controller; if at least one first communication state indicates that the energy storage system has a communication fault, executing a processing action corresponding to the communication fault; wherein the processing action comprises stopping the operation and maintaining the current state. According to the invention, the risk of information loss can be reduced, and the stability and reliability of the energy storage system are improved.

The invention discloses a megawatt electric hydrogen energy hub peak regulation capability evaluation method and system, and the method comprises the steps: constructing an electric-hydrogen-heat multi-physics field coupling model, outputting a megawatt electric hydrogen energy hub dynamic digital twin body, carrying out the peak regulation demand feature extraction, outputting a peak regulation demand matrix with a timestamp, and carrying out the hydrogen energy storage dynamic feature analysis. And outputting a hydrogen energy storage peak regulation capability map, carrying out multi-objective optimization decision-making to obtain a peak regulation optimization scheduling scheme, implementing Monte Carlo reliability simulation, outputting a risk-efficiency balance scheme, and determining a megawatt electric hydrogen energy hub peak regulation capability evaluation result based on a toughness index. According to the method, the electric-hydrogen-thermal multi-physics field coupling model and the dynamic digital twins are constructed, and Monte Carlo reliability simulation and toughness index evaluation are combined, so that the peak regulation capability can be comprehensively and accurately evaluated, complex working conditions and extreme scenes are effectively considered, and the evaluation reliability and accuracy are improved.

The invention relates to compressed carbon dioxide energy storage equipment, a carbon dioxide storage device and a control method, a plurality of independent carbon dioxide storage air bags are detachably installed on a supporting frame, and the carbon dioxide storage air bags can serve as floating assisting air bags of water equipment after storing air; each carbon dioxide storage air bag is independently monitored and controlled through an inflation and deflation control component, the pressure of air stored in each air bag can be monitored in real time, and the storage and release amount of carbon dioxide can be quickly and flexibly adjusted; the displacement sensor monitors the posture change of the supporting frame in real time, the controller adjusts the inflation and deflation strategy or the system operation state in time according to the current air pressure state of each carbon dioxide storage air bag and the posture change of the supporting frame, and air bag damage or system faults caused by structural instability are effectively prevented. A plurality of independent carbon dioxide storage air bags in the air bag type storage device can be flexibly arranged on a supporting frame to adapt to different terrains and space constraints.

The invention provides a new energy station load stability control method and system based on mutual conversion of electricity and hydrogen energy. Obtaining a generated power prediction curve of the new energy power generation facility, and determining a power difference value between the new energy power generation load and the power grid stability demand based on the prediction curve; a surplus hydrogen production electricity consumption instruction is issued, the operation number and the hydrogen production rate of an electric hydrogen production module are dispatched, and surplus electric energy is converted into hydrogen energy to be temporarily stored; receiving a real-time charging demand signal, dynamically issuing a charging permission load instruction based on the current new energy power generation load and the hydrogen gas turbine power generation load, and scheduling the power output of each charging pile; and according to the real-time states of the new energy power generation load, the electrical hydrogen production electrical load, the charging pile electrical load and the hydrogen gas turbine power generation load, starting, stopping and output power of the hydrogen gas turbine are adjusted, and reverse compensation of the new energy fluctuation power is achieved. New energy power generation fluctuation can be effectively stabilized, abandoned wind and abandoned light are reduced, and stable power supply of the distributed charging pile is achieved.

The invention relates to the technical field of flywheel and battery hybrid energy storage control, and discloses a quick power response and energy management method of a flywheel and electrochemical hybrid energy storage system. The method comprises the following steps of: acquiring flywheel rotating speed, kinetic energy allowance, battery end voltage and internal resistance in real time to form a state vector, performing consistency correction on an initial power decomposition instruction according to the state vector, and generating a final power instruction matched with unit real-time capability. Meanwhile, by monitoring the change trend of the flywheel kinetic energy and the battery charge state, a power decomposition coefficient is dynamically adjusted according to a preset coordination rule, and the power decomposition coefficient is fed back to an initial decomposition link to form closed-loop control. According to the method, accurate matching of the power instruction and the dynamic characteristics of the energy storage unit is realized, and the safety and accuracy of system response are improved; and through closed-loop trend adjustment, the long-acting adjustment capability and operation stability of the system are maintained.

The invention discloses a standby power supply system, and relates to the technical field of transformer substation power supply, a hydrogen production module is used for producing hydrogen by using commercial power or renewable power and then storing the hydrogen in a high-pressure gas storage tank of a hydrogen storage module, and the hydrogen storage module is provided with a one-way valve for the hydrogen to pass through in one way and a gas compressor for compressing the hydrogen to realize hydrogen conveying; after hydrogen stored in the hydrogen storage module is subjected to power generation through a fuel cell through the power generation module, the hydrogen is input into a storage battery pack of an uninterruptible power supply system of the transformer substation, and in the whole process, the control module detects the state of a main power supply and controls starting and stopping of the power generation module. The hydrogen production rate of the hydrogen production module and the hydrogen storage pressure of the hydrogen storage module are controlled, only water is generated in the power generation process, harmful emission is avoided, direct current generated by the fuel cell is directly matched with a UPS storage battery direct current bus, the response speed is high, conversion loss is reduced, the energy utilization efficiency is improved, the system automation degree is high, and the operation and maintenance cost is low.

The invention relates to the technical field of flywheel energy storage equipment, in particular to a flywheel rotor dynamic balance self-adaptive adjusting method and system based on magnetorheological fluid. The method comprises the steps that the sealing state of a magnetorheological fluid cavity is detected through a pressure sensor, and it is ensured that the pressure in the cavity is stable and free of leakage; the non-contact displacement sensor executes zero calibration, and output signal fluctuation is controlled within a preset range; carrying out no-load test on a current output port of the self-adaptive control module; when the rotating speed rises from a static state to a preset rotating speed value, a sensor of the real-time monitoring module synchronously collects a radial vibration signal of the rotor, decomposes a fundamental frequency vibration component with the same frequency as the rotating speed, and calculates the amplitude and the phase of the unbalance; when the rotating speed is stabilized in a preset rotating speed interval, the self-adaptive control module enters a closed-loop adjusting state, and when an unbalanced phase is calculated according to detection, a corresponding compensation quadrant fan-shaped cavity is locked, and the current of an electromagnetic coil is adjusted; the problem of traditional adjustment lag is solved, and over-compensation and under-compensation under variable working conditions are avoided.

The invention discloses a multi-element energy storage system anti-disturbance cooperative control method and system and a medium, and the method comprises the steps: obtaining the real-time operation data of a multi-element energy storage system which comprises an energy conversion and storage device, the energy conversion and storage device comprises an electric energy-heat energy conversion device, an electric energy-hydrogen energy conversion device, an electric energy storage device, a heat energy storage device, a hydrogen energy storage device and a superconducting magnetic energy storage device; constructing a multi-energy complementary comprehensive energy system model containing a minimum total operation cost objective function based on the real-time operation data; solving the multi-energy complementary comprehensive energy system model, and generating an anti-disturbance cooperative control strategy; and the charging and discharging instruction is controlled to be sent to the multi-element energy storage system based on the anti-disturbance cooperative control strategy to control cooperative operation of the multi-element energy storage system, so that real-time power balance of the multi-element energy storage system is realized, new energy output fluctuation and user load sudden change can be quickly responded, and the operation stability and anti-risk capability of the multi-element energy storage system are improved.

The invention relates to the technical field of power distribution system protection, in particular to a high-safety energy storage system and a fault detection method thereof, the system comprises a measurement and control center, an insulation monitoring device, a bidirectional DC-DC converter and an integrated DC power distribution unit, the insulation monitoring device is connected with a DC power distribution bus, and the ground insulation state of the bus is monitored in real time; the input end of the bidirectional DC-DC converter is connected with the storage battery pack, and the output end is connected with the DC power distribution bus through the integrated DC power distribution unit to construct an electric energy distribution path. The integrated direct current power distribution unit comprises a circuit breaker, two voltage detection modules and two current detection modules, the first voltage detection module is connected with the direct current power distribution bus and the measurement and control center, the second voltage detection module is connected with the circuit breaker and the measurement and control center, and the circuit breaker is connected with the direct current power distribution bus. And the two current detection modules are connected in series between the output end of the bidirectional DC-DC converter and the circuit breaker to form a current detection loop. According to the invention, through multi-level real-time monitoring and centralized control, the safety and fault response capability of the system are significantly improved.

The invention relates to an electrolytic hydrogen production system operation strategy adjusting method and device, equipment and a storage medium. The method comprises the steps of predicting a node electricity price of a power system based on obtained load prediction data, renewable energy output prediction data, unit operation parameters, power grid topology data and a constructed electricity price prediction model, and obtaining an electricity price prediction result; based on the electricity price prediction result, the obtained hydrogen demand data and operation data of the electrolytic hydrogen production system, the constructed electrolytic hydrogen production system model and a preset electric energy balance constraint condition, a preset optimization objective function is solved with the goal of minimizing the hydrogen production cost, and the optimal hydrogen production cost is obtained. Obtaining a target start-stop plan and a target operation power plan of the electrolytic hydrogen production system, wherein the optimization target function is constructed based on the operation cost of the power system and the operation cost of the electrolytic hydrogen production system; and adjusting the operation strategy of the electrolytic hydrogen production system based on the target start-stop plan and the target operation power plan. The method is beneficial to reducing the consumption of hydrogen production resources.

The invention provides a multi-target random capacity configuration method for a wind-solar complementary multi-tank cooperative hydrogen production system, and relates to the technical field of renewable energy hydrogen production. According to the method, under the uncertain condition, multi-dimensional key system indexes are considered, the single-cell power and number of PEM electrolytic cells and ALK electrolytic cells are finely matched, and a reasonable collaborative operation strategy is designed. On the basis of capacity configuration scheme design and multi-tank collaborative operation strategy optimization of the wind-solar complementary electrolytic hydrogen production system, a multi-target stochastic programming model considering wind-solar fluctuation output is developed, and collaborative optimization of continuous variables of rated capacity and operation power of each device and discrete variables of types, number and start-stop strategies of electrolytic tanks is realized. Aiming at the current situation that the current capacity configuration research mostly stays at the overall capacity ratio level and is lack of discussion on coupling optimization of the capacity, the number and the operation strategy of a single tank, the economic-energy efficiency-hydrogen production triple indexes of the system are effectively improved, and the global optimization of the capacity configuration of the all-off-grid wind-solar electrolytic hydrogen production system is realized.

The invention discloses a self-adaptive frequency modulation method and system for a battery energy storage-flywheel-hydrogen energy hybrid energy storage system. The method comprises the following steps: power grid frequency dynamic feature extraction and active power vacancy calculation; power demand three-dimensional decoupling based on frequency change emergency degree; designing a dynamic weight distribution function and calculating an adaptive weight; embedding a multi-objective optimization decision and life economy; energy storage state self-adaptive coordination and power redistribution based on multiple constraint conditions; and performing coordinated control and instruction execution. According to the invention, the frequency stability and operation economy of the high-proportion new energy power grid can be further improved. According to the scheme, the dynamic characteristics of the power grid frequency are sensed in real time, power requirements are precisely decoupled and are adaptively allocated to energy storage devices with different characteristics, and meanwhile, a multi-target optimization decision mechanism is embedded, so that the system response performance, the equipment service life and the full life cycle cost are collaboratively optimized.

The invention belongs to the technical field of compressed air control, and particularly relates to a compressed air energy storage power station multistage protection and controlled discharge control method and system. Comprising the steps that a compressed air energy storage power station system comprising a discharge bypass and a discharge valve and a safety valve which are arranged on the downstream of the discharge bypass is built; when pressure abnormity occurs, first-stage response is started, operation parameters of the compressed air energy storage power station system are adjusted, or a discharge bypass is started in an overlapped mode, and the pressure abnormity trend is restrained; when the first-stage response cannot restrain pressure abnormity, the second-stage response is started, the opening degree of the release valve is adjusted, and gas release is conducted; and when the second-level response cannot restrain pressure abnormity, third-level response is started, a stepped release sequence is adopted, the opening degree of a release valve is increased, meanwhile, the opening degree of a safety valve is gradually increased to conduct gas release, and finally final release is conducted by triggering a rupture disk. According to the invention, through a stepped control strategy, the defects that a single protection device is single in protection means and easy to over-excite protection are avoided.

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 invention discloses a state monitoring method for a two-way liquid cooling energy storage system, and belongs to the field of energy storage system monitoring. According to the method, the problem that the system state is difficult to accurately monitor in real time in the prior art is solved, the detailed operation state of the system can be mastered in real time through comprehensive data acquisition, the data quality is improved through filtering, denoising and normalization operation in the data processing link, a foundation can be laid for subsequent accurate evaluation, and the system reliability is improved. Potential faults can be found in time through state evaluation and abnormal early warning links, fault positions and reasons are accurately positioned in combination with a fault diagnosis algorithm, the maintenance time is effectively shortened, fault risks are reduced, system operation parameters are automatically adjusted according to evaluation and diagnosis results in an operation optimization link, and the system reliability is improved. And the cooling liquid flow, the temperature and the battery charging and discharging strategy are optimized, so that efficient and safe operation of the two-way liquid cooling energy storage system is guaranteed.

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 relates to the technical field of compressed air energy storage, and discloses a fault prediction and health management method for a compressed air energy storage power station, which comprises the following steps: establishing an accurate physical model of a key component of the compressed air energy storage power station, constructing a fault simulation injection mechanism to simulate a real fault, and obtaining a fault mode library; setting different severity levels for each fault mode in the fault mode library; collecting multi-source data in a simulation process under multiple working conditions; extracting sensitive features from the multi-source data and associating the sensitive features with corresponding fault tags; constructing a hybrid deep learning fault prediction model to output fault classification and residual service life; and evaluating the health state of the equipment based on multi-source information fusion. According to the method, massive fault data are generated through the high-fidelity simulation model, the hybrid deep learning fault prediction model is trained, fault prediction and health assessment of the compressed air energy storage power station are achieved, and the requirements of the large compressed air energy storage power station for high reliability, high availability and intelligent operation and maintenance are met.

The present application relates to a power control method and apparatus for an energy storage system. The method comprises: on the basis of an acquired external direct-current bus voltage within a target time period and real-time operation data of each supercapacitor cell, determining the working state of each balancing circuit within the target time period; and on the basis of the external direct-current bus voltage and the working state of each balancing circuit within the target time period, determining the power flow direction and power magnitude of a power converter within the target time period, thereby realizing the control of the power converter. By using the method, the power control of a power converter can be realized by taking into account real-time operation data of each supercapacitor cell in a supercapacitor module in combination with the working state of each balancing circuit, such that the power of the power converter can change as the state of the supercapacitor cell changes, thereby improving the utilization rate of electric energy stored in the supercapacitor cell.

The utility model discloses a liquefied air energy storage system which comprises a molecular sieve water separator and a molecular sieve adsorption tower, a separator air output pipe is connected with a top gas connecting pipe of the molecular sieve adsorption tower, and a bottom gas connecting pipe of the molecular sieve adsorption tower is connected with a cold box front compressor unit. The cold box front compressor unit is communicated with an air pipeline in the cold box, and an outlet of the air pipeline in the cold box is communicated with a first liquefied air storage tank through a first liquefied air output pipe with a first throttling valve; the output end of a liquid air pressure pump on a first liquefied air storage tank output pipe of the first liquefied air storage tank is communicated with the air input end of the expansion unit, the air output end of the expansion unit is provided with a hot blowing conveying pipe and a cold blowing conveying pipe, and the hot blowing conveying pipe is communicated with a bottom gas connecting pipe through a first heater and an electric heater; and the output end of the cold blowing gas conveying pipe is connected to the output end of the electric heater output pipe. The device has the advantages of simple structure, low energy consumption and full utilization of heat energy.

The invention discloses a debugging method and system based on a compressed air and lithium battery hybrid energy storage power station, and belongs to the technical field of intelligent debugging of energy storage power stations. The method comprises the steps that S1, load deviation is determined based on a power grid side load curve and a power grid dispatching instruction, and load change types are classified based on the load deviation; the load change type comprises intermediate frequency fluctuation and low frequency fluctuation; s2, performing cooperative debugging on a lithium battery energy storage system and a compressed air energy storage system based on the load change type; and S3, carrying out comprehensive evaluation on the running state of the hybrid energy storage power station after collaborative debugging, and correcting parameters based on a comprehensive evaluation result to complete debugging of the hybrid energy storage power station. Compressed air energy storage and lithium battery energy storage are organically combined, a parallel direct current bus integrated framework is adopted, the hybrid energy storage power station high in flexibility, high in efficiency and long in service life is constructed, and advantage complementation and function collaboration are achieved.

The invention relates to a primary frequency modulation control method for a pumped storage coupled compressed air energy storage system, and the method comprises the steps: building a frequency modulation control model based on the core component information and operation constraints of the pumped storage coupled compressed air energy storage frequency modulation system, building a state space model, and building a discretization state equation, establishing a comprehensive optimization model by taking the minimum power grid frequency deviation and the system operation cost as targets; and establishing a multi-parameter planning model based on the reservoir level, the gas storage pressure, the frequency deviation and the comprehensive optimization model, and converting a hierarchical model prediction control problem into multi-parameter quadratic programming to form a self-healing frequency modulation strategy to perform power output tracking control. Therefore, the problem that the frequency modulation performance is limited due to the fact that a water pressure system and an air pressure system in the hybrid power station are complex in coupling and large in response difference, and a related linear control strategy or a single control framework is difficult to achieve rapid response and accurate coordination of the hybrid system in the primary frequency modulation process is solved.

The present application discloses an intra-phase SOC balancing control method and control apparatus, an energy storage unit, and a medium. The method comprises: when a three-phase energy storage battery module of an energy storage unit is in an operating state, determining whether a target-phase energy storage battery module has achieved intra-phase SOC balancing; upon determining that the target-phase energy storage battery module does not achieve intra-phase SOC balancing, determining, on the basis of a preset redundancy number, an energy storage battery pack to be processed from among a plurality of target energy storage battery packs of the target-phase energy storage battery module; controlling the energy storage battery pack to be processed to switch from the operating state to a hot standby state; and upon determining that the target-phase energy storage battery module is restored to intra-phase SOC balancing, controlling the energy storage battery pack to be processed to switch from the hot standby state to the operating state. According to the method, when the three-phase energy storage battery module of the energy storage unit does not achieve intra-phase SOC balancing, the energy storage battery pack is controlled on the basis of the preset redundancy number to temporarily exit operation, which is beneficial to improving energy efficiency utilization of the energy storage unit.

The invention relates to a carbon dioxide combined cooling heating and power supply system, which realizes liquid carbon dioxide energy storage and combined cooling heating and power supply through the technologies of liquid carbon dioxide energy storage, Brayton expansion power generation or pressure increasing heating, carbon dioxide variable-capacity stable-pressure storage and gas transmission, and provides a new energy source for safe and long-period operation and large-scale or small-scale application of an energy storage device. An efficient and feasible technical path is provided for'valley shifting and peak filling 'of photovoltaic power, wind power and a power grid, and the method is suitable for various application scenes such as subway stations, large shopping malls, refrigeration houses or large electricity users.

The present application relates to a kind of outdoor energy storage device, including cover, lower shell, panel frame, inverter module, power management module, battery assembly, cover covers lower shell, panel frame is installed in lower shell and with the outer wall of lower shell flush, cover, panel frame and lower shell are enclosed to form the accommodation space for accommodating inverter module, power management module and battery assembly;Battery assembly is installed in the bottom wall of lower shell, power management module is installed in battery assembly, and for adjusting the power supply power of battery assembly, power management module is electrically connected with battery assembly, inverter module is installed in the shell of battery assembly and is stacked with battery assembly, inverter module is connected to power management module, panel frame is electrically connected to inverter module, panel frame is connected to power management module.Communication.Such setting, outdoor energy storage device is smaller, power supply is safe, and outer surface is flat, and it is convenient to carry.

The invention discloses a compressed air energy storage and energy-saving impact rotation starting system, system and equipment and a medium, and belongs to the technical field of energy-saving impact rotation starting. The method comprises the steps that air is compressed through a compressor and then sent to a cooling heat exchanger to be cooled, and cooled air is obtained; the cooling gas in the cooling heat exchanger is compressed and then conveyed into the first gas storage chamber until the pressure of the first gas storage chamber is at the first rated pressure; cooling gas in the cooling heat exchanger transfers and controls the expansion machine at a second target rotating speed through a buffer module, so that the output power of the generator reaches a first initial power value; air in the first air storage chamber is released by opening the air inlet adjusting valve, and the air flow in the first air storage chamber is controlled until the output power of the generator reaches a first output power value; and adjusting the starting regulating valve according to a preset rate, monitoring instrument data, and finishing starting when the starting regulating valve is in a closed state and the power of the generator is stable. The problem that a traditional expansion machine is large in throttling loss is solved.