68results about How to "Large energy storage capacity" patented technology

The invention relates to a series dynamic voltage restorer which adopts a super-capacitor and battery hybrid energy storage system, belonging to the technical field of power equipment. The dynamic voltage restorer comprises a charge device which is used for charging the super-capacitor and battery hybrid energy storage system, a hybrid storage energy system consisting of a super-capacitor and a battery and used for storing the power energy in direct current form, an invert unit which is used for outputting compensation voltage and a boosting filter unit which is used for connecting the dynamic voltage restorer to a power system. The dynamic voltage restorer uses one hybrid energy storage module to realize the energy storage requirement of the direct current side of the restorer to replace the traditional energy storage manner, thus satisfying the compensation need of short-time drop of voltage in the power system. At the same time, compared with the dynamic voltage restorer which adopts a traditional energy storage unit, the dynamic voltage restorer has better dynamic response, longer compensation time and higher performance price ratio and is more environment-friendly.

The invention belongs to the field of energy storage, and discloses a mixed gas separation, mass storage, pressure rise and energy storage device and a method and a utility system, and a heat exchange pressure equalizer. The separation of mixed gas, the pressure rise, the energy storage, the heat exchange and the conversion of gas and liquid are finished in one device, so that the equipment is simplified, the efficiency is improved, and the heat energy is reduced; the cold energy is lost; the energy storage and the energy release can be separately or synchronously performed, so that the emission of carbon dioxide is reduced; and a nitrogen oxide, a sulfur oxide, heavy metal [pm 2.5] and the like are collected for storage and utilization to change harmful substances to useful substances. The invention discloses a gas (air and smoke) condensation, separation and energy storage power station, a wind-electricity plant air separation and energy storage power station, a photovoltaic power generation plant air separation and energy storage power station, a solar heat power air energy storage power station, a wind-electricity solar heat power complementary air energy storage power station, a nuclear power air separation and energy storage power station, a ire coal combustion biomass power generation plane smoke separation and energy storage power station, a gas power generation smoke separation and energy storage power station and an industrial kiln smoke separation and energy storage power station.

The invention relates to a hybrid energy storage topological structure on the basis of an MMC (modular multilevel converter). The structure comprises a positive bridge arm and a negative bridge arm; the positive bridge arm is formed by sequentially connecting power conversion subunits 1 to n in series; one end of the positive bridge arm is connected with a high-voltage DC (Direct Current) positive bus bar and the other end of the positive bridge arm is connected to a high-voltage three-phase AC (Alternating Current) power grid by a current limiting reactor; the negative bridge arm is formed by sequentially connecting power conversion subunits n+1 to 2n in series; one end of the negative bridge arm is connected with a high-voltage DC negative bus bar and the other end of the negative bridge arm is connected to the high-voltage three-phase AC power grid by a current limiting reactor; each functional conversion subunit is formed by connecting a power conversion module, a potential isolation module and an energy storage module in series. According to the invention, various energy storage bodies are flexibly switched into a power system and an energy storage function and a service which are uninterrupted, high in quality, flexible to control and safe to operate are provided for the power system.

The invention relates to an environmentally-friendly and high-efficiency multi-clockwork energy-storing and energy-releasing device. The environmentally-friendly and high-efficiency multi-clockwork energy-storing and energy-releasing device comprises a box body, an input part, an energy-storing part and an output part, wherein the input part consists of an input shaft and an input driving wheel; the energy-storing part is formed by connecting n clockwork energy-storing units in series; and the output part comprises an output gear and an energy-releasing speed governor. Compared with the priorart, the environmentally-friendly and high-efficiency multi-clockwork energy-storing and energy-releasing device has the advantages that: a plurality of clockworks are used for storing energy so the energy-storing capacity is large and the defect of deficient energy-storing capacity by a single clockwork is overcome; an energy-releasing speed governor is adopted, so the energy can be released according to the rotating speed required by the load and the requirements of various working conditions can be met; the environmentally-friendly and high-efficiency multi-clockwork energy-storing and energy-releasing device is simple in structure, easy in manufacturing and low in cost and has a wide application range; and the device does not have any pollution to environments and is a clean energy-storing device.

The invention relates to a phase-change energy-storage radiator, and belongs to the field of new type energy, energy conservation and environmental protection. The phase-change energy-storage radiator is used for storage and controlled releasing of heat energy in multiple grades. The phase-change energy-storage radiator comprises an outer heat preservation box and an energy-storage unit; a natural convection radiating runner is formed between the energy-storage unit and a heat preservation shell; and the natural convection radiating runner is controlled to be opened and closed, and therefore timing accumulated storage and releasing of the energy can be achieved. Heat insulation and energy storage can be completely achieved in the energy storage process of the phase-change energy-storage radiator, and meanwhile radiating can be controlled in the storage process. The device is large in energy-storage volume and small in size. According to a specially developed and allocated mixed chlorinated paraffin low-temperature phase-change energy-storage material, the energy-storage temperature scope is appropriate, the material is non-toxic and free of chemical changes, the energy-storage temperature scope and the heat release amount are not changed after repeated utilization, undercooling and overheating phenomena are avoided, and both the physical and chemical property and the reliability are excellent.

A circular track magnetic levitation vehicle energy storage system comprises a track (10), a vehicle (20), a current conversion device (30) and a track wall (5). Vehicle-mounted permanent magnet blocks (1) and a vehicle drive magnetic pole (2) are fixed to the vehicle (20); and a track drive coil (3) and track permanent magnet blocks (4) are fixed to the track (10). When the circular track magnetic levitation vehicle energy storage system needs to store energy, the current conversion device (30) absorbs energy from a power grid, a moor system composed of the vehicle drive magnetic pole (2) andthe track drive coil (3) drives the vehicle (20) to rotate at an accelerated speed, and the stored kinetic energy is increased; and when the circular track magnetic levitation vehicle energy storagesystem needs to release the energy, the motor system works in an electric generator state, and generated electric energy is fed back to the power grid through the current conversion device (30). Levitation and guidance of the vehicle (20) are achieved through the vehicle-mounted permanent magnet blocks (1) and the track permanent magnet blocks (4), and friction between the vehicle (20) and the track (10) is reduced.

A compressed air energy storage power generating system comprises an electromotor, an air compressor, a high-pressure air storage tank, a low-pressure steam turbine and a power generator, wherein the electromotor drives the air compressor, the low-pressure steam turbine drives the power generator, and air compressed by the air compressor drives the low-pressure steam turbine. The compressed air energy storage power generating system is high in efficiency, long in service life, convenient in storage and use, high in storage capacity, low in investment cost, is energy-saving, emission-reduction, low-carbon and environment-friendly by utilizing compressed air to generate power, breaks the scope of all power machines, is a perfect combination of the fluid mechanics, the air pressure mechanics, the lever mechanics and the potential energy mechanics, and is capable of circulating self energy supply and realizing multiple work application, so that mechanical efficiency of the compressed air energy storage power generating system is improved greatly and more energy can be saved. Besides, heat insulation and dissipation are out of consideration since ultrahigh pressure steam driving is omitted. The compressed air energy storage power generating system is simple in structure, low in cost, convenient in maintenance and durable, and can be applied to power dragging and power generation widely.

The invention discloses a hundred-megawatt level heavy type flywheel energy storage system based on gas magnetic fluid float cylinder suspension. The hundred-megawatt level heavy type flywheel energy storage system based on the gas magnetic fluid float cylinder suspension comprises a heavy type flywheel, a rotating shaft, a driving unit and an output unit. A float cylinder is arranged on the rotating shaft, and the float cylinder is one separation or combination of an air cushion float cylinder, a magnetic suspension float cylinder and a fluid float cylinder. The float cylinder is added on the rotating shaft, load bearing capability of the rotating shaft is improved, and the problem that a heavy type flywheel can not be adopted by an existing flywheel energy storage system is solved. The hundred-megawatt level heavy type flywheel energy storage system has the advantages of being high in energy storage efficiency, strong in dilatation capability and wide in energy storage scale, and has the advantages of being high in power density, long in service life, limitless in charge-discharge times, free-of-pollution and the like as traditional flywheel energy storage technology. The hundred-megawatt level heavy type flywheel energy storage system simultaneously is low in construction requirement, is mainly used in flat suppression fluctuation and smooth grid-tied, can be used for constructing of a super-large scale energy storage pitch peak power station, and can also be used as a distribution type intelligent microgrid energy storage core.

The invention discloses a phase change energy storage temperature controller for space. The temperature controller comprises a heat dispersion device, a heat storage device and a thermochromism paintlayer; the heat dispersion device consists of an evaporation section, a gas/liquid phase change cavity, support frames, a liquid sucking core, a condensation section, and gas/liquid phase mediums filled in the gas/liquid phase change cavity; the support frames are arranged in the gas/liquid phase change cavity in a lattice form; the heat storage device consists of a condensation section, gradual shrinkage layering ribs, a radiation section, and solid/liquid phase change storage mediums filled among gaps of the gradual shrinkage layering ribs; the widths of the gradual shrinkage layering ribs are reduced from top to bottom in the vertical direction; and the thermochromism paint layer is coated on the outer surface of the radiation section of the heat storage device. The heat dispersion device with the lattice support frames is excellent in temperature uniformity, and can eliminate local heat spots; and through the gradual shrinkage layering ribs, the heat exchange between the solid/liquid phase change storage mediums in the heat dispersion device and the heat storage device is strengthened, so that the energy storage is more efficient.

The invention discloses an energy-storage lithium battery parallel-connection capacity-expansion circuit. The energy-storage lithium battery parallel-connection capacity-expansion circuit comprises more than two battery pack units, wherein the anode output end and the cathode output end of each battery pack unit are respectively connected in parallel; each battery pack unit internally comprises a battery pack N1 and a single chip microcomputer M1; a switch S1 and a current limiting resistor R1 are serially connected in sequence between the cathode of the battery pack N1 and a node between the cathodes of one battery pack N1 and the corresponding battery pack unit; a switch S2 is connected in parallel with two ends of a series circuit of one switch S1 and the corresponding current limiting resistor R1; one switch S1 and the corresponding switch S2 are connected with a control port of the corresponding single chip microcomputer M1 and controls the disconnection and closing work of the corresponding single chip microcomputer M1; the battery pack units are communicated and controlled by a communication bus of the single chip microcomputers. The invention also discloses an energy-storage lithium battery parallel-connection capacity-expansion method. The energy-storage lithium battery parallel-connection capacity-expansion circuit has the advantages of being large in energy storage capacity, stable in balance of initial voltage between two battery packs, simple in structure, low in cost, capable of improving the safety and the stability of the lithium battery packs; the energy-storage lithium battery parallel-connection capacity-expansion circuit has a wide application prospect.

The invention discloses a mechanically coupled flywheel assisted composite energy storage system and a control method thereof. The system comprises a flywheel module and a compressed air energy storage module. The flywheel module is connected to a rotating disc through a continuously variable transmission when a clutch is closed, and the rotating disc achieves pre-synchronization with the flywheelspeed by motor acceleration. The rotating disc is connected to a reciprocating compressor, the reciprocating compressor is connected to the compressed air energy storage module, and the compressed air energy storage module compensates an intermittent power supply by connecting a generator. The flywheel energy storage and the compressed air energy storage adopt a mechanically coupled parallel structure. By collecting the flywheel speed, the clutch switch and the compressed air energy storage working state are determined, and the control strategy is simple and easy to operate and achieve.

The invention provides a wind power plant electric energy quality optimization system based on energy storage, comprising a wind power plant mixing energy storage device. The wind power plant mixing energy storage device is connected to a plurality of wind turbine generator systems, which are connected to power grid. The wind power plant mixing energy storage device comprises an AC/DC energy storage converter, a bidirectional DC/DC direct-current converter, a storage battery set and a super capacitor set. The bidirectional DC/DC direct-current converter is in series connection with the super capacitor set, and then is in parallel connection with the storage battery set, and finally is in series connection with the AC/DC energy storage converter. The AC/DC energy storage converter adopts decoupling direct power control to achieve total energy storage power control. The DC/DC converter achieves the energy storage power distribution between the storage battery set and the super capacitance set. The invention is advantageous in that the aim of inhibiting the power fluctuation of the wind power plant can be achieved; the electric energy quality of the wind power plant can be improved; aset of feasible technology reference can be provided for the electric energy quality optimization of the wind power plant.

The invention discloses a method for reducing requirements of a medical diagnostic X-ray apparatus on power supply capacity, and belongs to the field of medical apparatus. The method comprises the following steps: setting an electric energy storage module and a charging module at the power supply input end of an inverted power supply module, and carrying out on-line continuous electric energy supplement on the electric energy storage module in a mode of 'float charging'; and setting a voltage comparing/monitoring module which is used for detecting the output voltage of the electric energy storage module or the input voltage of the inverted power supply module and provide interlocking control conditions for the startup of the inverted power supply module. The method avoids the adverse effect on normal operation and service life of the medical diagnostic X-ray apparatus caused by insufficient capacity and unstable quality of the single-phase civil power supply; the application range of the medical diagnostic X-ray apparatus is greatly expanded; preconditions are created for using small and medium-sized medical diagnostic X-ray apparatus in medical health centers or stations or spots; the method can be widely used in the fields of design and manufacture of the small and medium-sized medical diagnostic X-ray apparatus with the specifications lower than 400 mA.

The invention relates to a gravity energy storage system. According to the structure of the gravity energy storage system, at least two vertical shafts are built underground, and the bottoms of the vertical shafts mutually communicate; a bidirectional water pump is arranged on a channel at the bottom of each vertical shaft, and each bidirectional water pump is connected with an upper water tank onthe ground through a water pipe and a water valve; rails are arranged above each vertical shaft, a gantry crane is arranged on the rails, and a lifting motor is installed on a base at the lower partof the gantry crane; the lifting motor is connected with a winding drum and drives the winding drum to rotate, and a steel wire rope is wound on the winding drum; and the steel wire rope penetrates through a fixed pulley set on the gantry crane and the rear tail end of a movable pulley set to be fixed on a gantry crane main beam on the upper portion of the gantry crane, a lifting appliance is arranged below the movable pulley set, and an energy storage block is hooked through the lifting appliance. According to the gravity energy storage system, electric power can be smoothly output, the occupied area is small, site selection is easy to achieve, no emission exists, pollution is avoided, the storage power is high, the efficiency is high, the service life is long, the problem of new energy grid connection can be effectively solved, and power fluctuation reduction can be effectively reduced.

The invention relates to an improved technique of a flywheel battery, in particular to a double-flywheel battery with high performance. The double-flywheel battery comprises a sealed outer enclosure arranged on an engine base, a rotating shaft, a bearing, a main motor rotor connected with the rotating shaft, a main motor stator arranged on the inner surface of the outer enclosure and correspondingto the main motor rotor, a vacuum nozzle and an electric power electron switching device. The double-flywheel battery is characterized in that two sides of the rotating shaft are provided with a flywheel component respectively, each flywheel component comprises a pair of flywheel bodies and support frames for mounting the flywheel bodies, and the support frames are fixedly connected with the rotating shaft. The double-flywheel battery not only can increase the accumulation energy of the flywheel, but also can improve the limit rotating speed of the flywheel, thereby having the advantages of large accumulation energy capacity, good effect, fast charging, low energy consumption, high efficacy, long service life and no pollution.

The invention discloses a graphene/graphene oxide thin film and a preparation method thereof, and a super capacitor. The preparation method of the graphene/graphene oxide thin film comprises a first step in which vacuum filtration is carried out on a graphene oxide suspension via a microporous filtering film, the microporous filtering film to which a filter cake attached is placed in a metal precursor solution for immersion, the microporous filtering film is removed, alcohol is used for repeatedly washing the filter cake, and the graphene oxide thin film is obtained after drying, a second step in which grapheme is added to an imidazolium-based ionic liquid solution for ultrasonic dispersion and a grapheme suspension is formed, and a third step in which the graphene oxide thin film obtained in the first step is placed at the bottom of a beaker, the grapheme suspension obtained in the second step slowly drops on and coats the graphene oxide thin film, a grapheme thin film is obtained, and the graphene/graphene oxide thin film is obtained when the dropping liquid spreads out fully and is dried. The graphene/graphene oxide thin film is light in weight, high in conductivity and strong in mechanical properties. The super capacitor adopts the graphene/graphene oxide thin film as a current collector and is large in energy-storage capacity and long in service life.

The invention discloses an energy storage system. The energy storage system comprises a charging unit, at least one energy storage unit, at least one inversion unit and a control unit, wherein the charging unit is used for charging the energy storage unit, the energy storage unit adopts a supercapacitor to store energy, the control unit is used for acquiring the stored electric quantity of the plurality of energy storage units and switching off the charging unit when the stored electric quantity of the energy storage unit reaches a set threshold, and the control unit switches off the charging unit when the inversion unit is still working. With the technical scheme disclosed by the invention, the transient output power of the energy storage system is improved.

The invention discloses a wind farm power and voltage regulation system containing energy storage and a capacity configuration optimization method thereof. When a power grid load is at a low ebb, thepower grid dispatching power is greater than the output power of a wind farm, compressed air energy storage is in a compressed energy storage mode, and excess wind energy is converted into high-pressure air energy for storage; at the same time, after high-pressure and high-temperature air generated in the compression process passes through a heat exchanger, heat is stored in a heat storage chamberthrough heat transfer oil for preheating expanded air; when the output power of the wind farm is greater than the set fluctuation, an air storage tank releases high-pressure air to generate electricity in an expanding mode, and at the same time, the high-pressure air absorbs the heat of the high temperature heat transfer oil through the heat exchanger and converts the heat into electrical energyto stabilize the fluctuation; and when the output power of the wind farm is greater than the set value, the voltage stability is ensured and the reactive power margin of reactive power compensation equipment is increased by adjusting the power factor of a direct-drive wind turbine unit, the reactive power output by the compressed air energy storage and the output of a static reactive generator.