150 results about "Off-the-grid" patented technology

The invention provides an off-grid synthetic ammonia park electrolytic bath column level-energy storage-hydrogen storage collaborative optimization method based on rolling optimization, and relates to the technical field of energy storage and hydrogen storage collaboration. The method comprises the following steps: constructing an off-grid system architecture comprising wind-solar power generation, a plurality of rows of electrolytic cells, energy and hydrogen storage equipment and a synthesis ammonia device; a multi-device collaborative optimization strategy based on an eight-hour rolling time domain is designed, the system operation state is divided into high, medium and low working conditions through a working condition recognition mechanism, a current device operation scheme is actively adjusted according to wind and light power information of a next scheduling period, and collaborative regulation and control of energy storage and hydrogen storage are achieved. Compared with a traditional scheduling strategy, the collaborative optimization strategy provided by the invention improves the consumption rate of renewable energy sources of the system, reduces abandoned wind and light, improves the yield of synthetic ammonia, and verifies the effectiveness of the strategy.

The invention belongs to the technical field of off-grid inverter and battery management, and particularly relates to an off-grid inverter battery protection and charging control method and system based on impedance detection, and the method comprises the steps: collecting battery input parameters under two different load working conditions: no-load or light-load and on-load conditions; an Ohm law analytical algorithm is adopted, a corresponding relation model of the lithium battery remaining capacity SOC and the battery internal resistance is preset, the current actual internal resistance of the battery is obtained, the preset SOC-internal resistance corresponding relation model is input, and the current SOC value of the battery is obtained through reverse deduction; an inverter charging current adjusting threshold value is set in a grading mode, and a multi-dimensional risk early warning threshold value is set in a grading mode; and when the monitored numerical value exceeds a correspondingly set risk early warning threshold value, triggering a risk early warning signal of a corresponding grade and a matched disposal action, and carrying out full-process management and control of battery state real-time monitoring, charging current self-adaptive adjustment and risk early warning. Therefore, the problems of short service life, poor charging safety and the like of the battery in the prior art are solved.

The invention relates to the technical field of off-grid renewable energy hydrogen production, and discloses an off-grid alkaline hydrogen production system and a power adaptive distribution and safety control method thereof, the off-grid alkaline hydrogen production system comprises a renewable energy power supply unit, a parallel electrolytic cell module, a gas-liquid treatment system and a main controller; in the Faraday hydrogen production mode, the bubble volume is compressed by adjusting the operation pressure so as to modulate the impedance characteristic of the electrolytic cell, and the energy efficiency is improved in cooperation with current control; and in the non-Faraday polarization hot standby mode, the voltage of the rectifier cabinet is controlled to be clamped to a non-gassing polarization interval, and liquid level plugging is constructed in the U-shaped communicating pipeline according to the fluid statics principle. The system is further provided with a transient buffering strategy based on the pneumatic capacity, and pressure attenuation is delayed through the gas dead zone volume when power is suddenly reduced. The problems of hydrogen production efficiency optimization, low-power safe hot standby and mechanical protection under wide power fluctuation are effectively solved.

The invention relates to the technical field of renewable energy source hydrogen production, and discloses an off-grid alkaline electrolysis total hot standby method based on multi-source waste heat deep integrated recovery, which comprises the following steps: S1, constructing a frame which comprises an electrolytic cell array, a graded waste heat recovery loop, a phase change heat storage tank and an auxiliary and emergency assembly; s2, synchronously capturing multi-source waste heat of the system: starting a circulating power assembly of a graded waste heat recovery loop, and synchronously collecting process cooling waste heat and product gas waste heat generated in the operation process of the electrolytic cell array through the graded waste heat recovery loop; and S3, heat storage and cascade distribution. By constructing an independent closed type grading waste heat recovery loop, alkali liquor cooling waste heat in the process of operating an electrolytic cell captures sensible heat of high-temperature wet oxygen at an outlet of an oxygen separator through the waste heat recovery heat exchangers connected in parallel, direct loss of the two kinds of waste heat is avoided, external power or fuel does not need to be relied on for supplying energy to hot standby, and energy consumption in the hot standby stage is greatly reduced.

The invention discloses a plateau pasturing area power supply method and device based on an off-grid wind and light storage micro-grid, and relates to the technical field of off-grid micro-grids. Comprising the steps that regional characteristic data of a target plateau pasturing area are collected, off-grid wind-solar-storage micro-grid power supply equipment is arranged in the target plateau pasturing area based on the regional characteristic data, and the arranged off-grid wind-solar-storage micro-grid power supply equipment at least comprises a solar power generation device, a wind power generation device, a power storage device and a wind-solar complementary controller; in response to a power-on signal of the arranged off-grid wind-light storage micro-grid power supply equipment, collecting real-time environment information and historical power data of the target plateau pasturing area, and scheduling a wind-light complementary controller to optimize wind-light power generation information of the arranged off-grid wind-light storage micro-grid power supply equipment based on the real-time environment information and the historical power data; and controlling off-grid wind and light storage micro-grid power supply equipment to supply power to the target plateau pasturing area according to the optimized wind and light power generation information.

The invention relates to an off-grid hydrogen production system energy management scheduling method based on VMD-MPC, and relates to the field of new energy power generation energy management. According to the technical scheme, a low-frequency trend component and a high-frequency disturbance component in a power signal are stripped through variational mode decomposition VMD, a layered optimization framework of day-ahead global planning-intraday dynamic correction is constructed, and the pain point that an existing single time scale model lags in response to dynamic change of a system is effectively solved. In addition, according to the scheme, the input signal quality is optimized through VMD preprocessing, and the input stability of the model predictive control MPC scheduling model is remarkably improved. Besides, a deviation dynamic self-adaptive penalty mechanism is introduced into an intra-day rolling optimization link, so that a scheduling strategy can automatically adjust the tracking intensity according to the actual fluctuation amplitude and flexibly adapt to the change of working conditions, and the anti-interference ability of the system to deal with the uncertainty of wind and light output and load is greatly enhanced.

This invention relates to an interactive method and system for energy storage systems based on a voice-controlled model. The method includes: receiving user voice commands, performing voice recognition and semantic parsing, and extracting control intentions and parameters; matching or generating system operation strategies based on the parsing results; and decomposing the strategies into device control commands and issuing them for execution. The system includes modules for voice input, processing, escape extraction, strategy escape, strategy decomposition, and output, supporting multilingual recognition, local offline operation, strategy customization, and security verification. This invention lowers the barrier to entry for new energy storage systems, improves interactive intelligence and security, and is suitable for residential, commercial, off-grid, and mobile energy storage scenarios.

The application relates to a hybrid inverter two-way battery off-grid power distribution method, which is applied to the field of energy storage system control and comprises the following steps: judging the working mode of a two-way battery, and calculating the total effective capacity of the two-way battery according to the working mode; calculating a current distribution proportion coefficient of the two-way battery according to the total effective capacity and the real-time acquired terminal voltage of the two-way battery; and distributing the total current reference value of the real-time acquired bus voltage to the two-way battery according to the current distribution proportion coefficient, so as to realize off-grid power distribution of the two-way battery. The application has the technical effect that the total power of the two-way battery can be accurately and quickly distributed in an off-grid scene, and the mutation of the load power demand can be matched in real time.

The invention relates to an off-grid new energy storage system control method and device and a new energy storage and coal chemical coupling system. The method comprises the steps that the real-time charge state of an energy storage system is acquired; determining an operation control strategy according to the real-time charge state and a preset operation grade threshold value of the energy storage unit; operation of at least one of the new energy power generation system, the hydrogen production system, the heating and heat storage system and the energy storage system is controlled according to the operation control strategy; on the basis that the original electric energy quality of coal chemical enterprises is not affected, technical support can be provided for the coal chemical enterprises to explore an energy-saving and carbon-reducing mode, efficient, clean, economical and safe energy production and utilization can be achieved, and wide application prospects are achieved.

The invention provides an off-grid ReP2A integrated system topology capacity collaborative planning method, and relates to the technical field of renewable energy source hydrogen production and synthesis ammonia, and the method comprises the steps: constructing a mixed integer second-order cone programming model covering a power network, energy storage, hydrogen production, hydrogen storage, hydrogen transmission and synthesis ammonia full-chain coupling constraint; wherein the mixed integer second-order cone programming model takes the minimum annual average comprehensive cost of the system as a target to collaboratively optimize equipment capacity configuration, power transmission and hydrogen transmission network topology and a system operation strategy; and solving the mixed integer second-order cone programming model by adopting a branch and bound Benders decomposition algorithm, and outputting a programming construction scheme. The scheme can solve the problems of high comprehensive cost and low operation efficiency of the system.

The present invention provides an off-grid power distribution system capable of reliably performing earth leakage protection in an off-grid device having a self-power supply, the off-grid power distribution system having a power distribution system for distributing power from a self-power supply independent of a commercial power supply to a socket inside a structure disconnected from the commercial power supply, the power distribution system being provided with a main circuit breaker. The off-grid power distribution system is characterized in that the socket is composed of a socket with an electric leakage breaker.

The present application relates to the technical field of integrated energy system, and discloses a kind of wind light hydrogen storage integrated energy system optimization configuration method, device and medium, the present application is according to preset configuration capacity, fully considers physical system and external policy limit condition, can simulate the off-grid or grid-connected operation mode of wind light hydrogen storage integrated energy system, simultaneously, equipment attenuation factor can be considered comprehensively, and then obtain the system operation data of time or every fifteen minutes in whole operating life cycle.Further, with the lowest as optimization target of full life cycle LCOH flat hydrogen production cost, the configuration of wind light hydrogen storage integrated energy system is optimized in combination with operation simulation result, and can be used to guide the optimal economic configuration of actual wind light hydrogen storage integrated energy project.Therefore, by implementing the present application, the accuracy and reliability of optimization configuration result are improved by combining simulation result and optimization configuration.

This invention provides a grid-connected energy storage system and a stable operation control method for offshore wind power off-grid operation. The system consists of multiple offshore wind turbines connected in parallel. Each turbine is connected to an AC collection submarine cable via a turbine-side DC / DC converter, a grid-side AC / DC converter, and then connected to the turbine-side AC bus via a grid-side transformer. The turbine-side AC bus transmits power to the AC grid through a flexible DC-DC transmission system, and also connects to an energy storage battery via a grid-connected energy storage converter. The flexible DC-DC transmission system includes an AC grid-side transformer, a turbine-side MMC converter station, an onshore MMC converter station, and a grid-side transformer. This invention combines an offshore wind power off-grid operation system with an energy storage system, utilizing the margin of the energy storage system to achieve grid-connected / off-grid switching for the offshore wind power system. The energy storage system smooths out power fluctuations caused by wind energy fluctuations, enabling off-grid operation of the system.

The invention provides a load adjustment method and system in a microgrid grid-connected and off-grid switching process and a medium, and relates to the technical field of grid control, and the method comprises the steps: receiving a microgrid grid-connected and off-grid switching request, dividing the microgrid grid-connected and off-grid switching request into a first type of switching request and a second type of switching request, carrying out the response, and carrying out the global situation awareness and evaluation, and calculating combined net power disturbance caused by off-grid of the first type of micro-grid and grid connection of the second type of micro-grid to the main power grid, triggering a global unified load adjustment strategy based on the combined net power disturbance, and controlling the first type of micro-grid to execute grid connection operation and the second type of micro-grid to execute off-grid operation after global unified load adjustment is completed. The technical problems that in the prior art, load adjustment is single, and stability and safety are reduced in the grid-connected and off-grid switching process of the micro-grid are solved. The technical effects of improving the stability of the grid-connected and off-grid switching process of the micro-grid and ensuring the safety of the switching operation are achieved.

1. The name of the design product: battery pack. 2. The use of the design product: used in new energy storage system, used for off-grid and grid-connected user end power supply. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The embodiment of the application relates to the technical field of energy storage, and provides an off-grid operation method of an energy storage system, the energy storage system and an electric equipment, the operation method comprises the following steps: determining whether the grid connection of the energy storage system is powered off; in the case that the grid connection of the energy storage system is powered off, acquiring the port voltage and the port current of a load of the energy storage system at the grid connection power-off moment, the port voltage of the load being the voltage of one end of the load connected with a filter of the energy storage system, and the port current of the load being the current of one end of the load connected with the filter of the energy storage system; acquiring an arc extinguishing current of the energy storage system, and determining whether the off-grid power-on moment of the energy storage system is reached according to the size of the arc extinguishing current, the arc extinguishing current being the current flowing through the filter; in the case that the off-grid power-on moment is reached, controlling off-grid power generation, and controlling the energy storage system to operate in an off-grid operation mode based on the port voltage and the port current of the load. The method determines whether to start off-grid according to the size of the arc extinguishing current, so that the impact caused by direct starting is avoided.

The application discloses a kind of overall arrangement methods of off-grid hydrogen production platform suitable for large-scale deep far sea wind power, and relates to the technical field of off-grid hydrogen production platform, the present application adopts reasonable vertical arrangement method, it is favorable to reduce platform load gravity center, reduce platform vertical irregularity, adopt reasonable plane arrangement scheme, it is favorable to the operation and maintenance of equipment device, and also reduce the adverse effect of gravity load eccentricity on platform structure, ensure the structural rationality and safety of deep far sea off-grid hydrogen production platform.

The application belongs to the technical field of off-grid inverters and battery management, and particularly relates to a kind of off-grid inverter battery protection and charging control method and system based on impedance detection, wherein battery input parameters under two different load conditions of no-load or light load and load are collected;The corresponding relationship model of the preset lithium battery remaining capacity SOC and the battery internal resistance is obtained by using Ohm's law analytical algorithm, the current actual internal resistance of the battery is obtained, the preset SOC-internal resistance corresponding relationship model is input, and the current SOC value of the battery is obtained by back calculation;The inverter charging current regulation threshold is set in stages, and the multi-dimensional risk early warning threshold is set in stages;When the monitoring value exceeds the corresponding set risk early warning threshold, the corresponding level risk early warning signal and the matching disposal action are triggered, and the whole process management and control of battery state real-time monitoring, charging current adaptive regulation and risk early warning are carried out. Thus, the problems of short service life of battery, poor charging safety and the like in the prior art are solved.

The invention provides an off-grid wind power hydrogen production system based on a hydrogen fuel cell and a control method, and relates to the field of data processing, the system comprises a wind power generation unit, a three-port converter, a hydrogen production unit, a hydrogen storage unit, an electrochemical energy storage unit and a hydrogen fuel cell power generation unit, the wind power generation unit and the electrochemical energy storage unit supply power to the hydrogen production unit through a three-port converter, the wind power generation unit is further used for supplying power to a plant load, the hydrogen storage unit is used for storing hydrogen generated by the hydrogen production unit, and the hydrogen fuel cell power generation unit is used for generating power based on the hydrogen stored by the hydrogen storage unit. The hydrogen fuel cell power generation unit and the wind power generation unit are used for supplying power to a station load, and the hydrogen production stability is improved.

The portable water harvesting device includes a vacuum-compatible water collection unit and a detachable lid incorporating a metal-organic framework (MOF) unit. The water collection unit comprises a vacuum pump connection port and a drain valve for extracting collected water. The detachable lid contains MOFs in the form of beads or dispersed within a porous medium, encapsulated by a vapor-permeable, MOF-retaining filter membrane. A solar-absorbing metal plate is affixed to the outer surface of the lid to facilitate thermal activation. The lid is removably attached to the collection unit via a screw-type or snap-fit closure, forming an airtight seal during vacuum desorption. Enhanced exposure of MOFs to ambient air improves water uptake, and vacuum-assisted depressurization accelerates desorption. The device is lightweight, power-independent, and suitable for deployment in off-grid or water-scarce environments such as islands, boats, or emergency lifeboats.

To provide a power distribution system capable of surely performing leakage protection in an off-grid facility having its own power supply SOLUTION: An off-grid power distribution system comprising: a power distribution system for distributing power from a private power supply independent of a commercial power supply to an outlet in a structure separated from the commercial power supply; and a main breaker provided in the power distribution system, wherein the outlet comprises an outlet with an earth leakage breaker.SELECTED DRAWING: Figure 1

The invention discloses a non-inductive conversion control method for a network construction type energy storage power station. By monitoring the state of a main power supply in real time, once a fault occurs, non-inductive switching of an off-grid / grid-connected mode is realized within millisecond-level time by means of control logic based on a pre-synchronization control algorithm and a rapid power compensation algorithm, and continuous and uninterrupted power supply of a load is ensured; and smooth grid connection can be realized after power grid recovery. Besides, an energy management system (EMS) dynamically adjusts an operation strategy based on an objective function which takes the real-time operation cost, the energy storage state of charge (SOC) standard-reaching rate and the load power fluctuation coefficient of the network construction type energy storage power station as optimization objectives, so that the uninterruptible power supply requirement of the load can be met, and the power grid frequency and voltage stability can be actively supported. According to the method, the problems of slow response and single function of a traditional emergency power supply are solved, and millisecond-level non-inductive switching and stable power supply in a major scene are realized.

The present disclosure provides a method and system for utilizing a supercapacitor to participate in off-grid backup power regulation for a wind turbine generator, a device and a medium, and the method includes the following steps: S1, calculating an active power allocation requirement and a reactive power allocation requirement of a target wind farm, respectively; S2, determining active allocated power and reactive allocated power for a supercapacitor and a wind turbine in each wind turbine generator according to the obtained active power allocation requirement and reactive power allocation requirement of the target wind farm; and S3, adjusting an active power target value and a reactive power target value of each wind turbine generator according to the obtained active allocated power and reactive allocated power.

The invention discloses a control device, a computer readable storage medium, an energy storage system, an optical storage power generation system, a DAB type inverter and an off-grid operation control method thereof, and relates to the technical field of new energy power generation, in the DAB type inverter, each primary side conversion circuit is connected in parallel to a secondary side conversion circuit through a corresponding transformer; under the structure, the controller can enable the DAB type inverter to enter the off-grid mode by taking the preset off-grid voltage as the alternating-current side voltage control target of the DAB type inverter and adjusting the alternating-current side current of each primary side conversion circuit, so that the blank of a control scheme for enabling the DAB type inverter to enter the off-grid mode in the prior art is filled. And power control is carried out on at least one of the energy storage equipment and the photovoltaic module, so that the off-grid energy storage function of the DAB type inverter can be realized.

The utility model relates to the field of wind power hydrogen production, especially off -grid renewable energy hydrogen production system with black start power supply, the hydrogen production system includes: wind power generation side, including at least one wind turbine unit, each wind turbine unit is used to carry out wind power generation, transmission line is used for transmission each wind turbine unit produces electric power, hydrogen production side includes: at least one hydrogen production station, each hydrogen production station is connected to transmission line, and each hydrogen production station includes hydrogen production equipment, hydrogen storage equipment, hydrogen production equipment is used to utilize the power transmission line comes to make hydrogen, hydrogen storage equipment is used for hydrogen storage, black start power supply includes hydrogen fuel cell, is used to utilize hydrogen production equipment or hydrogen gas power generation of hydrogen storage equipment, to realize black start when the power failure of wind power generation side, the utility model embodiment can give consideration to the problem of reliability and high cost, and convenient coordination control operation and operation and maintenance management.

1. The name of the design product: stacked lithium battery energy storage system. 2. The use of the design product: mainly used for off-grid or grid-connected energy storage system, charging energy storage when main power is available and providing power when power is insufficient. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 2 perspective view 1. 5. Design 2 is designated as the basic design.

The invention relates to a control method and device for an optical storage grid-connected and off-grid air conditioner system, a photovoltaic air conditioner and a storage medium, and the method comprises the steps that under the condition that the optical storage grid-connected and off-grid air conditioner system is in an off-grid mode, the current moment is obtained, the time range to which the current moment belongs is determined, and the charge state of an energy storage system is obtained; and performing linkage control on the photovoltaic air conditioner, the photovoltaic system and the energy storage system according to the time range and the charge state of the energy storage system. Therefore, stable operation can still be maintained under the off-grid condition of photovoltaic power generation power fluctuation. The problem that an air conditioner is frequently started and stopped due to insufficient photovoltaic power supply of a traditional storage-free off-grid photovoltaic air conditioning system in the dim light periods such as morning and night is solved, the service life and operation reliability of core components such as an air conditioner compressor are guaranteed, indoor temperature fluctuation is remarkably smoothed, and the use experience of a user is improved.

The invention relates to a hybrid hydrogen thermo-electric multi-function industrial scale power plant, a system including such a power plant and connected appliances, a convection oven, and a hot and cold thermal fluid supply method. The invention uses a thermal fluid for heating, a thermal fluid for cooling, heat to both heat and cool the respective thermal fluids, a renewable or waste energy source to generate electricity, and hydrogen to store energy for both heating, cooling, and electricity. Ultimately, the invention allows to work off the grid on an industrial scale thereby having minimal environmental impact.

The invention discloses an intelligent off-grid conversion system based on a residual current protection circuit breaker, and relates to the technical field of power system protection control. Comprising an off-grid execution module, an off-grid acquisition module, a grid-connected execution module, a grid-connected acquisition module and an off-grid conversion analysis module, internal and external power grid states are monitored in real time through the grid-connected and off-grid acquisition module, and comprehensive judgment and decision are performed by the off-grid conversion analysis module; and when the power grid is abnormal and the internal system is safe, the off-grid execution module is controlled to disconnect the power grid and relieve the voltage-loss tripping function of the residual current protection circuit breaker, and the energy storage equipment is instructed to establish a stable off-grid micro-grid. And during the off-grid operation period, the action threshold and delay of residual current protection are adaptively adjusted according to the short-circuit capacity of the micro-grid. The problems of protection misoperation, poor weak power supply adaptability, insufficient off-grid stability, grid-connected impact and the like in traditional off-grid conversion are solved, and the running safety and the power supply continuity of the micro-grid are improved.

The invention provides a micro-grid off-grid switching control method and system, and belongs to the technical field of power supply, and the method specifically comprises the steps: carrying out the determination of an off-grid control micro-grid in a micro-grid based on the matching condition of an energy storage device of the micro-grid in a power distribution network and an electrical load in a weather type of a deviation voltage type, according to the composition data of the off-grid control micro-grid and the matching condition of the energy storage device and the electrical load of the micro-grid under each node voltage deviation type, the off-grid control scheme of the micro-grid except the off-grid control micro-grid under each node voltage deviation type is determined, and the operation stability and safety of the micro-grid are improved.