58results about How to "Lower energy storage costs" patented technology

The invention discloses a cold-heat combined supply solar thermochemical adsorption composite energy storing device in the technical field of solar photo-thermal conversion utilization. A solar heat collector, a heat collector heat-transfer fluid adjusting valve, a high-temperature heat-transfer fluid circulating pump and a reactor heat exchange coil are circularly connected; a cooling tower, a cooling tower heat-transfer fluid adjusting valve, a low-temperature heat-transfer fluid circulating pump and a liquid accumulator heat exchange coil are circularly connected; a solid-gas chemical reactor, a refrigerant adjusting valve and a refrigerant accumulator are connected; the reactor heat exchange coil, a heat user side adjusting valve, a heat user side and the high-temperature heat-transfer fluid circulating pump are connected; the liquid accumulator heat exchange coil, a color user side adjusting valve, a color user side and the low-temperature heat-transfer fluid circulating pump are connected; the liquid accumulator heat exchange coil, the cooling tower, the cooling tower heat-transfer fluid adjusting valve and the low-temperature heat-transfer fluid circulating pump are circularly connected; and the refrigerant accumulator, the refrigerant adjusting valve and the solid-gas chemical reactor are connected. The device has high energy storage density and can realize cold-heat combined supply and simultaneous storage of heat and cold.

The invention discloses a method for improving wind power absorption ability of an electric power system through electricity-to-gas energy storage technology. The method comprises steps of predicting system load at the t period before the day and wind power output at the t period before the day; by taking the principle that the wind power obtained through the prediction is absorbed in a minimal wind abandon mode by the system, setting a calling scheme I for optimizing the wind power absorption ability; and judging whether to translate load participation, solve translatable load, require an electricity-to-gas energy storage device to work and start an electricity-gas energy storage. According to the invention, parts of wind and electricity can be absorbed through the electricity-to-gas device when the wind power output is too big; impacts on the electric power system are reduced; obtained man-made natural gas can be directly stored and transported in a natural gas system; requirements on energy storage cells are reduced; and energy storage cost is reduced. On the other hand, the natural gas can provide a part of heat load, so pressure of a thermal power plant is reduced.

The invention relates to a direct current microgrid, specifically relates to a power pool-based dual-layer bus direct microgrid and a control method therefor, and solves the problems of high energy conversion loss and low system operating efficiency of the existing single-bus direct current microgrid, and high probability of power interference and poor system operating economy of the existing dual-bus direct current microgrid. The power pool-based dual-layer bus direct microgrid comprises an energy storage voltage regulation system, a direct current sub grid I and a direct current sub grid II, wherein the energy storage voltage regulation system comprises a power pool, a lithium battery pack, a DC/DC converter I, a DC/DC converter II and a DC/DC converter III; the power pool comprises a supercapacitor and a middle bus in parallel; the direct current sub grid I comprises a photovoltaic power generation unit I, a direct current load I and a direct current bus I; the direct current sub grid II comprises a photovoltaic power generation unit II, a direct current load II and a direct current bus II; and the direct current sub grid I and the direct current sub grid II have different voltage levels. The power pool-based dual-layer bus direct microgrid is applicable to a variety of fields.

The invention discloses solid gravity flow carrying equipment, gravity energy storage elements and an energy storage system. The solid gravity flow carrying equipment comprises a transfer track, wherein the transfer track is provided with a low-altitude section, a high-altitude section opposite to the low-altitude section and an inclined section, and the transfer track is used for enabling the gravity energy storage elements to directionally move; a plurality of pushing mechanisms are arranged side by side along the inclined section of the transfer track; electric and kinetic energy conversion mechanisms are connected with the pushing mechanisms; the plurality of pushing mechanisms are driven by the corresponding electric and kinetic energy conversion mechanisms to move and drive the plurality of gravity energy storage elements to be continuously pushed to the high-altitude section from the low-altitude section along the inclined section; or the plurality of pushing mechanisms move through the gravity action of the plurality of gravity energy storage elements and drive the corresponding electric and kinetic energy conversion mechanisms to convert the mechanical kinetic energy into the electric energy, and the gravity action is formed in the mode that the gravity energy storage elements are continuously pushed from the high-altitude section to the low-altitude section along the inclined section to slide downwards. The problems that in the prior art, the terrain requirement is high, and the applicability is not high are solved.

The invention relates to a business park source-storage-load optimized configuration method comprising the steps as follows: (1) building a controllable air conditioning cold/heat load optimized regulation model; (2) getting a business park photovoltaic power generation system output curve; (3) determining an energy storage system charge and discharge strategy; (4) building a business park source-storage-load optimized configuration model; and (5) calculating the desired charge and discharge power values of an energy storage battery at each moment of time. According to the invention, an air conditioning load is used as virtual energy storage based on the controllability thereof in order to reduce the capacity of a required energy storage system, and the minimum cost for users to purchase electricity from a large grid is taken as an objective function to realize timely consumption of photovoltaic energy to the maximum, so the investment cost on energy storage is reduced, and the electricity charge is saved for users. The method is of high economic feasibility.

Embodiments of the invention provide a micro-energy net system and a micro-energy net configuration method and apparatus. The system comprises a solar energy heat collection device, a combined heat and power generation unit and a biogas device; the solar energy heat collection device heats biogas slurry in the biogas device through a heat supply circulation pipeline to generate biogas; the biogasin the biogas device is input to the combined heat and power generation unit through a gas guide pipe for enabling the combined heat and power generation unit to generate power; and residual heat generated by power generation of the combined heat and power generation unit heats the biogas slurry in the biogas device through a residual heat recycling pipeline. A storage battery, and the like powerstorage apparatuses are not needed, so that the energy storage cost is reduced; solar energy and the biogas are taken as energy sources; different energy source forms are mutually coupled in differentphysical connection modes to realize multi-energy source complementation; load demands in multiple forms of power, heat, gas and the like are provided for users; and a complementary characteristic ofthe solar energy and the biogas improves the flexibility of micro-energy net operation to a certain extent and reduces the energy utilization cost of the users.

The invention discloses a wind farm energy storage lithium-ion electricity optimizing control method based on set inertial energy storage, and relates to a wind farm hybrid energy storage system combined mode and a capacity control method thereof. The wind farm energy storage lithium-ion electricity optimizing control method based on set inertial energy storage is characterized by comprising the following steps that (1) wind farm prediction capture power in a traditional control mode is calculated according to a wind farm prediction wind speed; (2) fast Fourier transform is conducted on the wind farm prediction power, so that a wind electricity power spectral characteristic curve, an output power high-frequency signal and an output power low-frequency signal are obtained; (3) the high-frequency component for restraining active output power of a set is stored through inertial kinetic energy of the set itself when wind farm output power undergoes primary smoothing; (4) a lithium battery is used for energy storage so that a smoothing task to the low-frequency component of wind farm output power waves can be achieved; (5) an evaluation index is established, and wind farm lithium battery capacity is controlled in an optimizing mode. According to the technical scheme, electric energy quality and energy storage economic benefits can be improved, and the service life of batteries is prolonged.

The invention discloses a flow cell battery system used for an off-grid solar power generation system. The flow cell battery system comprises a first electricity accumulating unit which is connected with a photovoltaic square matrix and a solar power charging and discharging controller, a second electricity accumulating unit which is connected with a direct current load and the solar power charging and discharging controller and is connected with an alternate current load through an inverter, an anode liquid storage tank, and a cathode liquid storage tank, wherein the anode electrolyte outlet of the first electricity accumulating unit and the anode electrolyte outlet of the second electricity accumulating unit are connected with the anode liquid storage tank; the cathode electrolyte outlet of the first electricity accumulating unit and the cathode electrolyte outlet of the second electricity accumulating unit are connected with the cathode liquid storage tank; the anode liquid storage tank is connected with the anode electrolyte inlet of the first electricity accumulating tank and the anode electrolyte inlet of the second electricity accumulating tank; the cathode liquid storage tank is connected with the cathode electrolyte inlet of the first electricity accumulating unit and the cathode electrolyte inlet of the second electricity accumulating unit. The flow cell battery system is lower in energy consumption during the discharging process.

The invention provides a data center power supply system, a power supply control method and device and a data center, and relates to the technical field of computers, in particular to the field of big data. According to the specific implementation scheme, the data center power supply system comprises a power supply module; the at least one server is connected to the output end; the energy storage module comprises a bidirectional direct-current converter, a battery pack loop and a battery management unit, a first side port of the bidirectional direct-current converter is connected with the output end of the power supply module, a second side port of the bidirectional direct-current converter is connected with the battery pack loop, and a control end of the bidirectional direct-current converter is connected with the battery management unit; and the battery management unit is used for controlling the current flowing directions of the first side port and the second side port of the bidirectional direct-current converter so as to charge the battery pack loop or enable the battery pack loop to discharge to the server. In the power supply system, the energy storage module is low in cost and flexible in configuration, and can meet the diversity requirements of the data center.

The invention discloses a power grid side energy storage optimization method and system. The method comprises the steps of obtaining power grid side energy storage data, and determining a power grid side energy storage optimization objective function according to the power grid side energy storage data; wherein the objective function considers a delayed power transmission network upgrading and reconstruction factor, a wind power consumption factor, an energy storage peak regulation factor and an energy storage system life factor; and optimizing the power grid side energy storage configurationby adopting a longicorn beard search algorithm according to the target function and the constraint condition. By the adoption of the method and system, energy storage can be reasonably configured, resource waste is reduced, and energy storage cost is reduced.

The invention discloses a solar combined electric energy-saving and environment-friendly motor homes without a charging pile, and relates to the field of new energy automobiles. The motor homes comprises an engine, a generator, a rectifier, a direct current transformer, an inverter, a lithium battery pack, a motor and household appliances, wherein the engine provides power for power generation ofthe generator, the rectifier is used for converting alternating current output by the generator into direct current, the direct current transformer is used for conducting voltage transformation on thedirect current voltage output by the rectifier and correspondingly conveying the direct current voltage to the lithium battery pack and the inverter, the inverter is used for converting direct current output by the direct current transformer into alternating current and conveying the alternating current to the motor, the motor is used for providing power for the motor homes, a sliding folding photovoltaic panel assembly is used for charging the lithium battery pack and supplying electricity to the household appliances, and the lithium battery pack is used for supplying power to the householdappliances and providing direct current to the inverter through the direct current transformer. The combined electric power system has the following advantages that 1, a charging pile does not need tobe charged; 2, the endurance mileage is over 600 kilometers; 3, the use amount of the lithium battery is only 1/5-1/3 of a battery electric vehicle, the energy storage cost is greatly reduced, and the safety and reliability are greatly improved; and 4, the service life of the photovoltaic panel is 25 years or more, the photovoltaic panel is used by using a solar energy supply motor homes power system and an interior household appliance inside the motor homes, so that the motor homes is clean and pollution-free; and meanwhile, the later use cost is greatly saved.

The invention discloses a solar grid-connected power generation system. A power generation current of a solar power station flows through a diode to be transmitted to an inverter, an auxiliary power supply unit outputs a voltage to a controllable rectifier which is connected with the diode in parallel, an output voltage value of the solar power station is collected, and the inverter is connected with a power grid. The solar grid-connected power generation system is a device which effectively utilizes solar energy to generate power and supply energy in a photovoltaic mode, solar devices are installed on all households in cities and counties meeting requirements and various buildings to generate power in the photovoltaic mode, 30%-40% clean energy can be generated, the solar grid-connected power generation system is an effective method for achieving energy safety and eliminating PM2.5 main pollutants and is an important measure for effectively utilizing photovoltaic capacity.

The invention discloses a wind power plant energy storage capacity configuration method considering a battery operation state, an energy storage system is connected in parallel at an outlet of a wind power plant, and the energy storage system at least comprises a group of battery packs arranged in parallel in pairs, a matched energy management system and a converter connected in series with the battery packs in pairs; the configuration method comprises the following specific steps: constructing a multi-objective optimization model of energy storage system capacity configuration, which comprises an energy storage comprehensive cost model, an energy storage life evaluation model and an energy storage unbalance degree optimization model, in a scene that a battery pack group controls smooth wind power; determining constraint conditions of energy storage capacity and converter power; and solving by adopting a particle swarm algorithm. According to the energy storage capacity configuration method established by the invention, the capacity configuration optimization target is established based on the attenuation index reflecting the unbalanced state, and meanwhile, important factors such as life evaluation and comprehensive cost are considered, and the energy storage capacity configured by the method has effectiveness and superiority in the aspects of cost, service life, battery unbalanced state and the like.

The invention relates to a compressed air energy storage system and an offshore converter platform with a compressed air energy storage function. The invention aims to overcome the problems of high randomness and insufficient stability of large-capacity wind power output caused by the fact that large-scale wind power is sent out through a converter station. According to the technical scheme, the compressed air energy storage system is provided with an air storage tank, a plurality of air compressors, a plurality of gas turbines and a power generator/motor which can drive the air compressors towork and can be driven by the gas turbines to generate power; the air compressors are sequentially connected in series, and air outlets of the air compressors connected in series are in pipeline connection with the air storage tank sequentially through an air compressor air outlet pipe valve, a cooler and an air storage tank air inlet pipe valve; the gas storage tank is sequentially connected with a plurality of gas turbines sequentially connected in series through a combustion chamber gas inlet pipe valve, a combustion chamber and a gas turbine gas inlet pipe valve pipeline. The invention isapplicable to the technical fields of green energy power generation technology and marine resource comprehensive application, and is particularly applicable to the fields of new energy such as offshore wind energy and the like and marine ranch aquaculture.

The system comprises a controller, an alternating current power grid, at least one photovoltaic module, an inverter, an alternating current bus, an alternating current power distribution cabinet, a direct current bus, an alternating current-to-direct current circuit, a direct current-to-direct current circuit and energy storage equipment, the alternating-current power grid is connected with the alternating-current bus; the photovoltaic module is connected with the inverter, the inverter is connected with the alternating-current bus, the alternating-current power distribution cabinet is connected with the alternating-current bus and the alternating-current-to-direct-current circuit, and the alternating-current-to-direct-current circuit is connected with the direct-current bus; the DC bus is connected with the DC-to-DC circuit; the DC-to-DC circuit is connected with the energy storage equipment; the controller is used for adjusting the energy storage device to be in a charging state or a discharging state according to the output total power of the photovoltaic module, the load total power and the load state of the alternating current power grid. By using the optical storage system provided by the invention, on the premise of reducing the optical stacking transformation cost, the difficulty of optical stacking transformation is simplified.

The invention discloses an energy storage system charging and discharging control method for smoothing photovoltaic power fluctuation, and the method comprises the following steps: S1, obtaining userload data and photovoltaic output data in a power distribution network, and configuring a hybrid energy storage system according to the collected data; S2, giving a transformer capacity reduction value [delta], setting an initial value k0 of a waveform forming coefficient, and calculating the maximum charging and discharging power value and the minimum energy value of the energy storage device according to an energy storage parameter calculation method; S3, obtaining a daily net load value by subtracting the value of the adjusting photovoltaic output curve from a daily load curve; S4, obtaining the maximum charging and discharging power value and the minimum energy value of the energy storage device according to the configuration method of the energy storage device; and S5, finding the optimal cost allocation when the transformer capacity is reduced by [delta] by analyzing the change of the k0 waveform coefficient. According to the technical scheme, fluctuation of photovoltaic output can be stabilized, the user load peak-valley difference is reduced, and the energy storage cost is well optimized.

The invention discloses a solar intermediate temperate heat collection and storage system and belongs to solar application. The solar intermediate temperate heat collection and storage system comprises an evacuated tube heat collector (1), a linear focusing heat collector (2), a circulating pump (3), a heat storage device (4), a flow diffusing pipe (5), heat storage balls (6) and a convergence layer (7); the heat storage device is a box body which is provided with a heat insulation layer in all directions; the lower end of the box body is provided with the flow diffusing pipe, the heat storageballs are located above the flow diffusing pipe, and the convergence layer is located above the heat storage balls; the flow diffusing pipe is in a tree shape composed of a main pipe and branch pipesand is provided with a plurality of pores; the upper end of the evacuated tube heat collector is connected with the lower end of the heat storage device through the linear focusing heat collector andthe circulating pump, the upper end of the heat storage device is connected with the lower end of the evacuated tube heat collector, and a heat collection and storage circulating loop is formed; andair serves as a heat transfer medium of the system. The solar intermediate temperate heat collection and storage system utilizes the air for heat transfer, utilizes concrete for energy storage and isthe highest in heat collection efficiency, the lowest in energy storage cost, capable of being suitable for multiple solar products and wide in application range.