18 results about "Intermittent energy source" patented technology

The invention discloses a thermoelectric hierarchical combined storage and utilization system which comprises a heating device, a first heat storage device, a second heat storage device and a heat exchange device, the first heat storage device comprises a first heat storage bin, one end of the first heat storage bin is communicated with the heating device, heat storage particles are arranged in the heat storage bin, and the second heat storage device comprises a second heat storage bin. Energy storage plates are longitudinally arranged in the second heat storage bin at intervals, the energy storage plates are filled with phase change heat storage media, one end of the second heat storage bin communicates with the other end of the first heat storage device, the other end of the second heat storage device communicates with the heating device, and one end of the heat exchange device communicates with the heating device; and the other end is communicated with the other end of the second heat storage bin. Therefore, according to the thermoelectric hierarchical combined storage and utilization system, hierarchical heat storage can be achieved, high-grade heat and medium-low-grade heat are fully utilized, the heat storage efficiency is improved, meanwhile, multi-category and multi-source energy sources or heat sources can be coupled, and fluctuating green electricity or waste heat is converted into heat energy to be stored; and when the energy is used, the heat energy stored in the phase change heat storage medium is released, so that the gap between intermittent energy and continuous requirements is filled up.

The invention discloses a multi-source synergistic hydrogen energy and coal chemical industry coupling method based on carbon-based solid waste, and belongs to the cross technical field of hydrogen energy and coal chemical industry, the scheme is as follows: coal chemical industry carbon-based solid waste is combusted to generate power, coal chemical industry waste heat is utilized to generate power, and coal chemical industry secondary energy is formed; new energy power generation and coal chemical secondary energy power generation are coordinated to form an island micro-grid, so that the power demand of hydrogen production by electrolysis of water is met; when the new energy is insufficient in power supply, the coal chemical secondary energy is used for maintaining 20% low-load operation of the electrolytic bath; hydrogen generated in the hydrogen production electrolytic cell is sent to the coal chemical industry; and oxygen generated in the hydrogen production electrolytic cell is sent to oxygen-enriched combustion. The coal chemical secondary energy is used as the bottom energy, the defect that attenuation of an electrolytic cell is accelerated due to frequent starting and stopping of the electrolytic cell caused by the fact that new energy is used as intermittent energy is overcome, the problem that hydrogen production cost is high due to hydrogen production, energy storage or hydrogen power generation through water electrolysis of primary energy is solved, and meanwhile a new absorption path is provided for carbon-based solid waste discharged by the coal chemical industry.

The present invention discloses a biomass energy cogeneration and storage coupling system, comprising a combustion furnace, a conversion device, a steam power generation component, and a heating device, wherein a combustion chamber is provided in the combustion furnace, the conversion device comprises a first heat exchange chamber and a second heat exchange chamber, the first heat exchange chamber is provided with a first heat exchange tube, the second heat exchange chamber is provided with a heat exchange plate, the heat exchange plate is provided with a cavity, and the cavity is connected to the first heat exchange tube; the steam power generation component comprises a coupled steam turbine and a generator for steam power generation, and the heating device is provided with a heating chamber, the heating chamber is provided with a heat storage medium, one end of the heating chamber is connected to the first heat exchange chamber, and the other end is connected to the air outlet. Thus, the present invention can couple multiple categories and sources of energy or heat sources, convert fluctuating green electricity or waste heat into thermal energy for storage, and then release the thermal energy stored in the thermal storage medium when energy is used to produce zero-carbon steam, thereby bridging the gap between intermittent energy and continuous demand.

A process for producing pyrolysis oil containing liquid hydrocarbons from plastic materials, preferably waste materials. The process is characterized by the use of an energy source, preferably of an intermittent nature (and variable intensity), such as solar radiation. The plastic material enters a pyrolysis reactor heated by a molten salt thermal fluid. The molten salt is heated by the intermittent source to a temperature that is not fixed but varies within a predetermined range. In particular, when the available amount of the energy source is equal to or exceeds a predetermined maximum value, the temperature of the molten salt is increased to the upper limit of the range. Conversely, when the available amount of the energy source is equal to or lower than a predetermined minimum value, the temperature of the molten salt is decreased to the lower limit of the range. For intermediate availability values, the temperature can also be intermediate, for example, by following a linear profile. The pyrolysis temperature follows the temperature of the molten salt. On the other hand, the pyrolysis pressure is adjusted to be higher (at least 2.5 bara) for lower pyrolysis temperatures and lower (up to 2 bara) for higher pyrolysis temperatures. Surprisingly, it has been discovered that by operating in a specific manner, the quality of the resulting pyrolysis oil remains constant even when the pyrolysis temperature fluctuates widely.

A method for providing primary frequency response for a renewable energy plant coupled to an electric power grid, the renewable energy plant having an intermittent energy source coupled thereto by an inverter, the method comprising: using a renewable energy plant control system, measuring frequency and determining a first difference signal between the measured frequency and a frequency reference; measuring power output from the renewable energy plant and determining a second difference signal between the measured power output and a power reference; generating an error signal from a sum of the first and second difference signals; generating a control signal by applying the error signal to a controller; limiting the control signal output from the controller to between predetermined minimum and maximum power limits for the inverter; while the control signal is limited by the predetermined minimum power limit for the inverter, disabling an integral function of the controller; and, applying the control signal to the inverter to control the power output from the intermittent energy source.

Static control loop for an inverter interfacing an intermittent power source and an AC power grid. The invention relates to a primary control method for an inverter interfacing an intermittent power source and an AC power grid. Through each of the different aspects of the invention, a new static control loop, or droop control loop 5, is proposed that adapts to variations in the available active power of the inverter 1.This loop can be advantageously implemented on each inverter that, among a plurality of generators connected to the grid, interfaces with an intermittent energy source, while ensuring: correct allocation of active power among the generators, and correct signaling, via the frequency at the point of connection of each generator to the grid, of when each generator reaches its active power limits, thus enabling the activation of protective measures so that each generator in the plurality returns to its active power range. Figure for the abbreviation: Fig. 4.

The invention discloses a low-carbon floor air supply system which comprises an air handling unit, an air supply output port of the air handling unit is communicated with an air supply cavity, and the low-carbon floor air supply system further comprises a floor air outlet and an air return outlet. The power output end of each wind driven generator is connected to a variable frequency driver of the air handling unit to form a wind energy-electric energy-mechanical energy conversion chain, a movable partition plate is arranged in the air supply cavity and divides the cavity into a plurality of independently-controlled air supply areas, and each air supply area corresponds to a set of floor air outlets. Each area is connected with an independent electric air volume adjusting valve, a transparent photovoltaic film is integrated in the building glass curtain wall, electric energy output by the transparent photovoltaic film is preferentially supplied to a fan motor of an air handling unit, multiple stages of heat exchangers are arranged at an air return outlet, and one stage of heat exchanger is coupled with a fresh air inlet to achieve cold energy recovery. The second-stage heat exchanger is connected with a building hot water system to achieve waste heat utilization, and the problem of contradiction between intermittent energy and continuous load requirements is effectively solved.

The application provides a photovoltaic energy storage system, comprising a photovoltaic power generation module, an electric energy conversion module and a commutation conversion module, wherein the output end of the photovoltaic power generation module is connected with the input end of the electric energy conversion module, and the output end of the electric energy conversion module is connected with the input end of the commutation conversion module; the electric energy conversion module has multiple outputs, the commutation conversion module comprises multiple energy storage access units and a power circuit connected with the output end of each energy storage access unit, and each output of the electric energy conversion module is connected with the input end of the energy storage access unit. The application can solve the fluctuation problem of the traditional centralized photovoltaic power generation, effectively handle the problems of power storage, battery loss and capacity configuration generated by the centralized photovoltaic intermittent energy consumption and storage, realize the storage and scheduling of redundant power, smooth the power generation output, reduce the transmission loss, improve the power quality and system stability, and protect the safety and stability of the power grid and the electrical equipment.

The invention discloses a distributed energy storage system oriented to a large energy station, which realizes high-density storage and flexible deployment of energy through modularized phase change energy storage units, and solves the problems of obvious equipment space constraint and outstanding land resource occupation in the traditional energy station construction process. Aiming at intermittent energy and dynamic user load, a three-stage cooperative working mechanism is constructed: on an energy supply side, phase-change materials are adopted to capture heat energy of different grades in a layered manner, so that the energy utilization rate is increased; on a user side, a load prediction algorithm and a real-time electricity price signal are combined, and an operation mode of'off-peak electricity energy storage-flat electricity energy release-peak electricity dormancy 'is intelligently switched; in a system level, a P2P energy transaction network between modules is constructed by using a block chain technology, and autonomous energy scheduling from an energy-rich module to a low-energy module is realized through a dynamic pricing mechanism. The'source-load interaction 'framework effectively solves the problems of module parallel differential pressure fluctuation and miniaturization cost challenge, and the adaptability and economical efficiency of the system in a dynamic environment are remarkably improved.

The invention relates to a method for producing pyrolysis oil containing liquid hydrocarbons from plastic materials, preferably waste materials. The method is characterized by the use of an energy source of preferably intermittent nature (and variable intensity), such as, for example, solar radiation. The plastic material enters a pyrolysis reactor, which is heated with a molten salt hot fluid. The molten salt is heated by the intermittent source to a temperature that is not fixed but variable within a predetermined range. Specifically, when the availability of the energy source is equal to or exceeds a predetermined maximum value, the temperature of the molten salt reaches the upper end of the range. Instead, when the availability of the energy source is equal to or lower than a predetermined minimum value, the temperature of the molten salt reaches the lower end of the range. For an intermediate availability value, the temperature may also reach an intermediate value, for example, following a linear profile. The pyrolysis temperature follows the temperature of the molten salt. On the other hand, the pyrolysis pressure is adjusted such that when the pyrolysis temperature is lower, the pyrolysis pressure is higher (at least 2.5 bar) and when the pyrolysis temperature is higher, the pyrolysis pressure is lower (no more than 2 bar). Surprisingly, it was found that, by operating in a specified manner, the quality of the obtained pyrolysis oil remains constant, even for considerable variations in pyrolysis temperature.

A system for producing hydrogen gas from a hydrocarbon feed, the system comprising an intermittent energy source, a thermal battery, and a pyrolysis system. The intermittent energy source outputs electrical energy. The thermal battery is in electrical communication with the intermittent energy source, receives the electrical energy, and outputs a heated fluid thermal storage medium. The pyrolysis system is in flow communication with the thermal battery, receives the hydrocarbon feed, receives the heated fluid thermal storage medium, heats the hydrocarbon feed, pyrolyzes the heated hydrocarbon feed to produce heated pyrolysis products, cools the heated pyrolysis products to produce cooled pyrolysis products, separates carbon black from the cooled pyrolysis products, separates hydrogen gas from a remainder of the cooled pyrolysis products, and outputs the hydrogen gas.

The application discloses a diesel storage device for inhibiting intermittent energy fluctuation, and relates to the technical field of diesel storage equipment. The device comprises a diesel storage device body and a plug assembly. When the diesel storage device is idle, the plug-in interface entrance is blocked by a blocking plate, so that external water vapor and dust cannot enter the plug-in interface and affect the use of the conductor column. During use, the protection assembly can be pushed into the plug-in interface to avoid affecting the connection of the plug. When the plug is pulled out, the scraper can clean the outer wall of the conductor column, and the annular wiping cloth can wipe the surface of the conductor column to keep it clean at all times, so that the adhered stains cannot affect the conduction of the circuit, and the stability of the circuit transmission is ensured. During the ejection process, the blocking plate can push the dust in the plug-in interface out, so that the conductor column is in a clean working environment, the conductor column is prevented from being corroded by stains, and the service life of the conductor column is prolonged.

The present invention relates to the technical field of thermal power generation, and specifically relates to a thermal power generation system and an adjustment method. The thermal power generation system includes: a boiler and a steam turbine connected and arranged, and the steam turbine is further connected to a generator set; the adjustment device includes a valve assembly and a feed water heating assembly connected to the steam extraction end of the steam turbine; the adjustment method includes: monitoring the frequency of the generator set connected to the power grid; when the frequency is greater than a first preset value, increasing the opening degree of the valve assembly, increasing the steam extraction amount, reducing the exhaust steam amount of the steam turbine, and reducing the frequency; when the frequency is less than a second preset value, reducing the opening degree of the valve assembly, reducing the steam extraction amount, increasing the exhaust steam amount of the steam turbine, and increasing the frequency. The present application controls the steam extraction amount of the steam turbine by adjusting the opening degree of the valve assembly, changes the rotational speed of the steam turbine, and then quickly and effectively adjusts the frequency of the power grid of the thermal power generation system connected to large-scale intermittent energy sources to maintain the frequency stability of the power grid.

The embodiment of the invention provides a power generation scheduling method, which comprises the following steps: for any historical time period, determining a prediction deviation for any resource node of any resource category according to a prediction power and an actual power; wherein the resource category comprises a load and at least one intermittent energy power generation resource; determining an FRP historical reference factor according to the prediction deviation corresponding to each historical time period; determining a corresponding FRP prediction reference factor for any resource type according to the total prediction power of all corresponding resource nodes for the target control time period; determining the total FRP demand quantity according to the FRP historical reference factor and the FRP prediction reference factor so as to determine a first FRP demand quantity corresponding to each resource category; for any power generation node, distributing the first FRP demand quantity according to the corresponding predicted power and the total predicted power corresponding to the intermittent energy power generation resources to obtain a second FRP demand quantity; and performing power generation scheduling on the node according to the second FRP demand quantity.

The utility model relates to the technical field of green ammonia synthesis, and discloses a skid-mounted green ammonia synthesis device capable of dynamically adjusting load, which comprises a first bottom plate, an electrolytic tank, a second bottom plate and a synthesis ammonia tower, a first mounting rack is mounted on the left side of the top of the first bottom plate, and a catalyst adding port can be assembled on the end face of the synthesis ammonia tower. According to the utility model, the insertion block on the side edge of the second bottom plate is inserted into the insertion slot, and the solar panel is used for light energy utilization, so that the cathode plate and the anode plate form electrolysis work in the electrolysis box, hydrogen is produced and then conveyed to the position of the synthesis gas mixer, and then nitrogen is conveyed to the position of the nitrogen feeding pipe; after being processed by a synthesis ammonia tower, a cooling tower and a separator, the raw materials are finally stored in a liquid ammonia storage tank, and can be efficiently manufactured at the temperature and pressure lower than those of a traditional Harberg-Burr method, so that efficient and stable green ammonia synthesis can be realized by using a specific catalyst under unstable or intermittent energy input.

The invention relates to an intermittent energy output modeling prediction method and system based on a Gaussian process, and the method comprises the steps: carrying out the modeling of intermittent energy output based on a Bernstein polynomial, calculating a mean value and a covariance function of the intermittent energy output, and constructing a Gaussian process prior form; obtaining a historical observation set of intermittent energy output, optimizing a hyper-parameter in a Gaussian process prior form through maximum likelihood estimation according to a noise observation point of each track sample in the historical observation set on discrete time, and solving a covariance matrix of a Bernstein coefficient; and calculating a mean value and a covariance matrix of the posterior distribution of the Bernstein coefficient according to the observed intermittent energy output at multiple moments, thereby obtaining the joint distribution of the intermittent energy output in the future test time. Compared with the prior art, the method has the advantages that the latest observed data can be effectively utilized to predict the generating capacity of the next time period, and energy scheduling and optimization with quick response are realized.

The invention relates to the technical field of energy storage, and discloses a thermoelectric energy storage device and a power generation system. According to the thermoelectric energy storage device provided by the invention, the plurality of thermoelectric energy storage units are arranged in parallel and / or in series, so that the thermoelectric energy storage device can be flexibly deployed and expanded as required without depending on special geographical conditions and large-scale civil engineering, and can be directly transported and installed after being prefabricated in a factory, and the influence of site limitation on the energy storage device is reduced. Meanwhile, due to the fact that phase change heat storage has the characteristics of high energy density and low heat loss, a large amount of heat can be stably absorbed and released in the phase change process, temperature fluctuation is small, and the peak regulation requirements of intermittent energy sources such as wind power and photovoltaic energy are met.

A system for producing hydrogen gas from a hydrocarbon feed, the system comprising an intermittent energy source, a thermal battery, and a pyrolysis system. The intermittent energy source outputs electrical energy. The thermal battery is in electrical communication with the intermittent energy source, receives the electrical energy, and outputs a heated fluid thermal storage medium. The pyrolysis system is in flow communication with the thermal battery, receives the hydrocarbon feed, receives the heated fluid thermal storage medium, heats the hydrocarbon feed, pyrolyzes the heated hydrocarbon feed to produce heated pyrolysis products, cools the heated pyrolysis products to produce cooled pyrolysis products, separates carbon black from the cooled pyrolysis products, separates hydrogen gas from a remainder of the cooled pyrolysis products, and outputs the hydrogen gas.