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Variable-speed constant-frequency doubly-fed generator system and its parallel network controlling method
InactiveCN1770585AReduce capacityReduce the burden onSingle network parallel feeding arrangementsMotor speedElectricity
This invention relates to variable speed and constant frequency wind force generating system by use of double feedback sensing motor and its parallel interconnected control method, which comprises double sense motor, exciting transducer, DSP unit, electricity collecting unit, speed, position sense unit and drive unit. The method comprises the following steps: controlling exciting transducer and using it to control double feedback motor rotors to generate voltage; controlling the motor rotor voltage phase, frame and frequency without single simultaneous control on net voltage and rotor voltage; in motor speed range of 0 to 0.5s, the drive unit starting drive exciting transducer with wide rotation speed range and low demands; the control process adopting current open control.
Owner:北京科诺伟业科技股份有限公司 +1
Hybrid DC (direct current) electric power transmission system
InactiveCN102231520AEliminate commutation failuresReduce in quantityElectric power transfer ac networkTwo-wire dc circuitsElectric power transmissionHybrid type
The invention discloses a hybrid DC (direct current) electric power transmission system comprising a passive filter, a rectifier converter transformer, a thyristor converter, a flat wave reactor, a DC electric power line, a multi-level converter and an inverse converter transformer. A twelve-pulse bridge converter based on a thyristor is arranged at a sending-end rectifier side, and a modularized multi-level converter is arranged at a receiving-end inverter side, thus eliminating the phase conversion failure of the traditional DC electric power transmission system fundamentally and being suitable for supplying power for multi-DC droppoint areas, passive networks or weak alternating current systems and other occasions. Compared with a light-type high-voltage DC electric transmission system, the hybrid DC electric power transmission system provided by the invention has the advantages that the number of expensive full-control devices is greatly decreased, the cost is reduced, the loss is reduced, the reliability is high, the control is flexible, and fewer reactive compensation devices are used. In addition, the hybrid DC electric power transmission system provided by the invention can be used as a black start power supply of a receiving-end alternating current system and is good in engineering application value.
Owner:ZHEJIANG UNIV
Comprehensive deep sea energy utilizing system
ActiveCN103047085ALow costStable output powerWind motor combinationsMachines/enginesEngineeringTemperature difference
The invention discloses a comprehensive deep sea energy utilizing system. The comprehensive deep sea energy utilizing system comprises a wind turbine, a temperature difference energy generating device, a wave energy utilizing device and an ocean current energy utilizing device. The temperature difference energy generating device comprises a flash evaporator, a working medium circulating unit and a generator, liquid working medium in the working medium circulating unit is delivered to an evaporating heat exchanger via a working medium pump, is changed into unsaturated air by absorbing heat in the evaporating heat exchanger to push a steam turbine to act, and then enters a condensing heat exchanger to be condensed into liquid to flow back to the working medium pump. In the ocean current energy utilizing device, the upper end of a tower column is fixed connected at the bottom of a floating platform, a hydraulic turbine for driving the working medium pump is arranged on the tower column and close to the lower end. The wave energy utilizing device comprises a plurality of floater power units which are arranged below the floating platform and close to the sea surface, a water inlet of at least one floater power unit I is communicated with the surface seawater, a water outlet of the one floater power unit I is communicated with the flash evaporator, a water inlet of at least one floater power unit II is communicated with the deep seawater, and a water outlet of the one floater power unit II is communicated with the condensing heat exchanger.
Owner:中科国风科技有限公司
Control method of flying capacitive type five-level inverter device
ActiveCN103872937AConducive to grid-connected operationLow line voltage harmonicsAc-dc conversionPower inverterHarmonic
The invention discloses a control method of a flying capacitive type five-level inverter device which adopts an improved carrier wave overlapped PWM method. According to the control method of the flying capacitive type five-level inverter device, the states of '2' '1' '0' '-1' and '-2' needed for controlling an inverter are obtained, a level vector quantity selecting link is added by utilizing the redundancy characteristics of on-off states of a flying capacitor, the level vector quantity states are reasonably distributed after an initial value is set, and the voltage of the flying capacitor is controlled and balanced through switchover of the several level states. When the improved carrier wave overlapped PWM method is applied to a flying capacitive type five-level inverter circuit, the control method of the flying capacitive type five-level inverter device is higher in flexibility, is simpler to achieve and largely reduces line voltage harmonic compared with a traditional carrier wave phase-shifting PWM method.
Owner:SHANGHAI JIAO TONG UNIV
Method for determining allowed capacity of distribution network distributed power supply
InactiveCN106340897AConvenient guidanceQuick solveData processing applicationsSingle network parallel feeding arrangementsBalance equationDistribution grid
The invention discloses a method for determining the allowed capacity of a distribution network distributed power supply. The method comprises a step of carrying out the conversion of an equivalent model on the fan of a distributed power supply to be accessed and photovoltaic equipment under a steady-state condition, a step of determining the maximum allowed capacity of a system distributed power supply through a distributed network current balance equation and a steady-state safety constraint condition with the maximum allowed capacity of the system distributed power supply as an objective function, a step of checking protection equipment characteristics on the determined maximum allowed capacity of the system distributed power supply, and viewing the determined maximum allowed capacity as a maximum allowed capacity accepted by a system if a characteristic of not damaging initial protection equipment is satisfied, and correcting the capacity of the distributed power supply until the characteristic of not damaging initial protection equipment is satisfied if the characteristic of not damaging initial protection equipment is not satisfied. The method has the advantages that the maximum allowed capacity of the distributed power supply of the distribution network in a steady state can be comprehensively and accurately calculated, and the guide of the planning of the distributed power supply in the distribution network is facilitated.
Owner:山东省建设项目环境评审服务中心
Nested tidal current generating set of air guide sleeve paddle-changing horizontal shaft
InactiveCN102384019AGood energy gathering effectIncrease tidal current velocityReaction enginesEngine componentsReverse currentEngineering
The invention discloses a nested tidal current generating set of an air guide sleeve paddle-changing horizontal shaft, and belongs to the field of ocean regenerative energy development. The generating set is composed of an outer air guide sleeve, an air guide sleeve support, an inner air guide sleeve, a main shaft, a main shaft bearing, a hub, a blade, a paddle-changing bearing, a paddle-changinggear, a paddle-changing rack, a paddle-changing motor, a storage battery, a generator, a gear box and seal; and the outer air guide sleeve and the inner air guide sleeve form the nested air guide sleeve, the roof of the blade realizes the blade paddle-changing through the paddle-changing motor. The nested tidal current generating set provided by the invention has the advantages that the blade neighbouring tide flow velocity is greatly improved through the nested air guide sleeve, a paddle-changing mechanism causes a horizontal shaft to be adapted to reversing current, the efficiency is obvious high, thereby having self-starting ability at different flow rates; a complete machine structure is concise, the electrical energy output is stable, thereby having cleanness and no pollution.
Owner:DALIAN UNIV OF TECH
Planet speed regulator
InactiveCN101294618AIncrease powerImprove carrying capacityToothed gearingsPower flowMaterial consumption
The invention discloses a planetary speed regulator. The planetary speed regulator comprises a frame (4) inside which a main power flow transmission mechanism and an auxiliary power flow transmission mechanism are arranged and connected to each other via a coupling disk (6). The main power flow transmission mechanism is a planetary gear transmission mechanism and arranged in a way that the input end thereof is coupled with a main power shaft (19) and the output end thereof is coupled with an output shaft (1). An auxiliary power flow transmission mechanism is a planetary gear transmission mechanism or planetary transmission mechanism. A control shaft (15) is coupled with the auxiliary power flow transmission mechanism via a transmission pair. The planetary speed regulator has the advantages of small size, high transmission efficiency, low energy and material consumption and wide application range, and is suitable for the use in large-power and medium-power equipment.
Owner:湛剀节能科技股份有限公司
Finite differential converter method of triangular function and implementation apparatus thereof
InactiveCN101013853ASimple control strategySimplify control proceduresAc-dc conversionAc-ac conversionTriangular functionTransducer
The invention discloses one triangle function limit micro variable flow method, which comprises the following steps: setting displacement transducer connection set to get needed basic voltage; using each base frequency and frequency function or different function to form triangle function limit micro variable equation with two sides as input and output signals; setting sine function transducer, power electron switch and outside circuit to get the analysis variable equation topological circuit and integrating the angle frequency and difference to form integral logic control.
Owner:内蒙古亿人环保科技有限公司
Low-medium temperature heat energy recovery power generation device
The invention discloses a low-medium temperature heat energy recovery power generation device which comprises a heat exchanger, a turbine generator, a condenser and a refrigeration agent pump, wherein the heat exchanger is provided with a heat source outlet, a heat source inlet, a refrigeration agent outlet and a refrigeration agent inlet, wherein the refrigeration agent outlet is connected with the turbine generator; the turbine generator, the condenser and the refrigeration agent pump are sequentially connected with one another; an outlet of the refrigeration agent pump is connected with the refrigeration agent inlet; the heat exchanger can be used for driving turbine generator to generate electricity by vaporizing the liquid refrigeration agent by using heat of a heat source flowing through the heat source inlet; the condenser is used for condensing the refrigeration agent after the refrigeration agent pushes an impeller to rotate, and then outputting the condensed refrigeration agent to the refrigeration agent pump; and the refrigeration agent pump is used for sending the condensed refrigeration agent back to the heat source inlet. The low-medium temperature heat energy recovery power generation device can be used for generating electricity by utilizing waste low-medium temperature heat energy, and has the advantages of high energy conversion rate, good applicability and stable output.
Owner:上海尚实航空发动机股份有限公司
Movable photovoltaic wave power generation ship
InactiveCN103821662AStrong complementarityStable power outputPhotovoltaic supportsWaterborne vesselsWave power generationMechanical energy
The invention discloses a movable photovoltaic wave power generation ship, which comprises a movable ship body, wave energy converting devices, a photovoltaic battery assembly, a planet power box and a generator, wherein the wave energy converting devices are symmetrically arranged on both sides of the ship body; the wave energy converting device on each side comprises a main shaft and a plurality of floating bodies; the floating bodies oscillate upwards and downwards under the action of wave; the wave energy is transmitted to the main shafts through triangular frames and overrunning clutches, and is converted into mechanical energy; the main shafts on both sides of the ship body are connected with the planet power box; the planet power tank is used for outputting mechanical energy to drive the generator to generate power; the electric energy generated by the photovoltaic battery assembly is connected to a storage battery for storage after being in grid-connection with the electric energy generated by the generator. By adopting the movable photovoltaic wave power generation ship, the generation forms of marine solar energy and wave energy are utilized comprehensively, so that the power compensation in a complex environment is realized, the stability of power output is ensured, and the grid connection is facilitated.
Owner:厦门中泰风电能源有限公司
Wind power generation method and equipment thereof
InactiveCN1776223AStable voltageEasy to gridElectrolysis componentsInternal combustion piston enginesElectricityHydrogen
This invention relates to a wind electricity power generation method and equipment foe converting wind energy to electricity power. Said method use hydrogen and oxygen generated by electrolyzing water. Said equipment contains wind power generation equipment, electrolyzing equipment whose input end connected with the export end of wind power generation equipment, electricity generation equipment using electrolyzed hydrogen and oxygen to generate. Said invention solves the voltage unstable problem of current wind power generation technology.
Owner:王登祥
Floating type offshore wind plant wave energy auxiliary power generation device
ActiveCN104791195AEnsure stabilityConducive to grid connectionEnergy storageMachines/enginesSeawaterFloating platform
The invention relates to a device for generating power through natural energy, in particular to a floating type offshore wind plant wave energy auxiliary power generation device. The floating type offshore wind plant wave energy auxiliary power generation device is structurally characterized in that a plurality of gas chambers are formed in inner cavities of floating platforms and are sequentially connected with the gas inlet chamber as the head and the gas outlet chamber as the tail, a vent hole is formed between every two adjacent gas chambers and provided with a ventilation check gas valve, and a water chamber is arranged below each gas chamber and communicated with seawater; two ventilation holes are formed between each gas chamber and the corresponding water chamber, and the floating platforms are connected; a gas outlet of the floating platform in the front is connected and communicated with a gas inlet of the floating platform behind through a pipeline; compressed gas flow is connected to an air turbine through a gas flow channel, and the air turbine is connected with a rotating shaft of an AC power generator. The floating type offshore wind plant wave energy auxiliary power generation device has the advantages that the offshore wind power generation type and the wave energy power generation type are comprehensively utilized, the wave energy is effectively combined into deep sea wind power, the power compensation under the complex environment is achieved, the power output stability is ensured, and the grid connection is facilitated.
Owner:POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD
Novel intelligent substation on basis of application of clean energy
ActiveCN102957105AReduce configurationLow investment costElectrical storage systemDistribution substationsPower equipmentEngineering
The invention belongs to the technical field of power equipment and particularly relates to a novel intelligent substation on the basis of application of clean energy. The invention particularly relates to a wind power, photovoltaic and energy storage device which is a novel energy-saving intelligent substation on the basis of a three-winding transformer. The novel intelligent substation mainly comprises a power transformation system, a clean energy power generation system and a power consumption system in the substation, wherein the power transformation system is connected with a power grid and the clean energy power generation system; and the power consumption system in the substation is connected with the clean energy power generation system. According to the invention, the configuration of a substation power distribution transformer can be directly omitted; resources in the substation are sufficiently utilized; the operation and maintenance cost of the substation is effectively saved, and the power supply quality and the power supply reliability of power for the substation are greatly promoted. The novel intelligent substation has excellent application prospect in places with suitable wind and illumination or in economy demonstration areas with a high intelligent level.
Owner:LIAONING ELECTRIC POWER COMPANY LIMITED POWER SCI RES INSTION +2
Comprehensive utilization system for marine energy
ActiveCN103075295AStrong complementarityStable power outputWind motor combinationsMachines/enginesOcean bottomEngineering
The invention discloses a comprehensive utilization system for marine energy, which comprises a wind turbine, a wave energy converting device and an ocean current energy converting device, wherein the ocean current energy converting device comprises a plurality of floating platforms which are arranged on the periphery of the wind turbine; the floating platforms have closed tops and opening lower ends; each of the floating platforms is fixedly connected with a vertical column which is fixed on seabed; the floating platforms are communicated through connecting pipes which are mounted on side walls of the floating platforms; air holes are respectively formed at the tops of two floating platforms; one-way ventilating valves in inverse directions are respectively mounted; one floating platform can only suck air while the other floating platform can only discharge air; an air turbine is mounted at the top of the floating platform which can only discharge air; and an output shaft of the floating platform and the output shaft of the ocean current energy converting device realize the power combination through a gear system so as to drive a generator for generating electricity. The three generating forms, namely, marine wind energy, wave energy and ocean current energy, are comprehensively utilized by the system, the complementation of electric power under a complex environment is realized, the stability of power output is ensured and the grid-connection is benefited. Besides, the impact of the wave to a tower and the turbulivity of the ocean current are reduced by the wave energy converting device.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Active power rolling scheduling method for photo-thermal power station-wind power plant combined system
ActiveCN105488357AReduce volatilityProtection against active power fluctuationsSpecial data processing applicationsInformaticsElectricityPeaking power plant
The invention relates to an active power rolling scheduling method for a photo-thermal power station-wind power plant combined system and belongs to the technical field of operation and control of electric power systems. Firstly, historical prediction data and historical actual active power data of a wind power plant and a photo-thermal power station light field are subjected to statistics, and a relation curve between the historical prediction data and the historical actual active power data is established; according to the relation curve, an active power scene set of the wind power plant and the photo-thermal power station light field in the next 48 hours is generated; according to the scene set and the electricity selling price of an actually accessed power grid, the planned value of output active power of the photo-thermal power station-wind power plant combined system in the next 24 hours is calculated; the combined system executes the calculated planned value of the output active power in the time scale of the next 24 hours. With the adoption of the method, the problem of fluctuation of power of the wind power plant in the photo-thermal power station-wind power plant combined system is solved, and grid connection of renewable energy sources is promoted.
Owner:TSINGHUA UNIV
Combined heating and power system of heat source complementary Stirling engine and method of system
ActiveCN102878037AImprove stabilityIncreased persistenceFrom solar energySolar thermal energy generationSolar lightData acquisition
The invention discloses a combined heating and power system of a heat source complementary Stirling engine as well as a method of the system. A disc-type secondary reflector is used for focusing solar light onto a hybrid heat source heater; the hybrid heat source heater is connected with a heat end of the Stirling engine, and an output end of the Stirling engine is connected with a generator; a cold water tank, a water pump, one path of a cooler of the Stirling engine and a smoke gas side heat exchanger in the hybrid heat source hater are sequentially connected with a hot water tank; the other path of the cooler of the Stirling engine is directly connected with the hot water tank; a fuel compensating device and an electric control valve are sequentially connected with a heat source heater; and the output end of the Stirling engine, a data acquiring and detecting device, an auxiliary heat source controller and the electric control valve are sequentially connected. According to the combined heating and power system, problems of instable electric output, poor durability and difficult grid connection of the conventional solar generating system; meanwhile, the system realizes combined heating and power; and competitiveness of a solar heat generating grid and entire economic benefit of the system are greatly improved.
Owner:ZHEJIANG UNIV
Method and device for controlling coordinated operation of wind power and solar power complementary system
ActiveCN109386429ACoordinated operation control implementationReduce output fluctuationWind motor with solar radiationFrom solar energyAir volumeEngineering
The invention provides a method and a device for controlling the coordinated operation of a wind power and solar power complementary system. A maximum power output predication value of wind power anda maximum power output predication value of solar power are calculated at first; then wind power output dispatch instruction values and solar power output dispatch instruction values at various moments are determined through a multi-target optimization module; and then the actual power of a wind power plant and the actual power of a solar power plant in the wind power and solar power complementarysystem are controlled according to the wind power output dispatch instruction values and the solar power output dispatch instruction values at the various moments. By adopting the method and the device provided by the invention, the grid connection of renewable energy sources is promoted, the abandoned air volume is reduced, and the benefits of the grid connection are increased; the maximizing ofthe benefits of the grid connection of the wind power and solar power complementary system and the variance of the grid-connected output power are coordinated better, and the grid connection of the renewable energy sources and the friendly operation of the relative power grid are facilitated.
Owner:CHINA ELECTRIC POWER RES INST +3
Altitude difference extraction-type artificial wind power generation device and method thereof
InactiveCN101922415AGuaranteed uptimeReduce wind power costsWind motor controlFinal product manufactureEngineeringGravity center
The invention relates to an altitude difference extraction-type artificial wind power generation device, in particular to a wind power generation device which forms a continuous and stable wind field by using an extraction tube with a certain height and the action of an atmosphere altitude pressure difference and has adjustable speed. The altitude difference extraction-type artificial wind power generation device comprises a whole set of generating devices of an altitude difference extraction pipeline device, a wind power generation device, a speed regulating device, a power output processing control system and the like; as well as a whole set of design theory methods of an equivalent energy calculating method, a power measuring and calculating as well as type parameter matching method, an energy conversion rate improving method, a speed regulation and overspeed protection method and the like. The invention solves a series of technical problems of instable and uncontrollable natural wind power generation, low energy use ratio, mismatching of power transmission and power distribution, difficult synchronization, and the like in the prior art, settles the theoretical misunderstanding of the traditional similar artificial wind power generation method, makes the artificial wind power generation technology into reality, ensures that the wind power development center is moved from countryside to the city so that people can use the self-generating power without pollution and energy consumption truly, and further eliminates the urban heat land effect and improves the urban dwelling environment.
Owner:江继辉
Water wheel tank car power generation device
InactiveCN105257450AIncrease investmentPower stabilityHydro energy generationEngine componentsClutchElectric generator
The invention relates to a water wheel tank car power generation device which utilizes water flow discharged by a hydroelectric power plant but not utilized yet as a power source so as to perform power regeneration. The device comprises a water wheel tank car, a water wheel with the two ends outputting power, a bevel gear disc, a conical gear, same-direction transmission shafts on the left and right sides, a transverse transmission shaft, a ratchet gear transmitting power in the single direction, a center active force transmission shaft, a dual-direction car, a clutch, a speed-up gear box, an inertia flywheel disc and a power generator. The device utilizes the water wheel tank car to enter and exit a working area, the optimum acting point of the water wheel is adjusted, power is transmitted, and the power generator is pulled to generate power. The water flow which is discharged in a long time is used as the power, so that clean, environment-friendly, non-pollution, energy-saving and emission-reduction electric energy is provided in a long time, and the stable electric energy can be provided in a long time so as to facilitate grid connection. Long-time discharged water flow can be utilized for power regeneration, so that ecological civilization construction is facilitated. Energy-saving electric energy can be provided in a long time, so that economic benefits are achieved.
Owner:邓祥华
Biomass and coal mixed fluidized-bed gasification method and device
ActiveCN1230498CHigh volatile contentLess fixed carbonCombined combustion mitigationGranular/pulverulent flues gasificationWater vaporProduced water
Owner:JIANGSU UNIV
Suspended type double-drive track changing system and track thereof
PendingCN109398373APrevent derailmentEasy to gridRailway tracksElevated railway with suspended vehicleActuatorControl theory
The invention discloses a suspended type double-drive track changing system. The suspended type double-drive track changing system comprises a vehicle body; an air suspension is fixedly mounted at thecenter of the upper side wall of the vehicle body; a double-drive track changing device comprises a lower driving body, an upper driving body and rocker arm bodies; a planetary reduction mechanism ismounted at the lower ends of the rocker arm bodies; a transmission mechanism is fixedly mounted on the front side wall of the planetary reduction mechanism; and a rocker arm actuator is fixedly mounted on the front side wall of the transmission mechanism. The suspended type double-drive track changing system possesses running ability on two tracks, can be compatible with a modern universal track,can also interdependently run on an I-shaped track with a simpler structure, does not depend on a turnout system, realizes safety track changing between the two tracks and is likely to be grid-connected with an existing track system. According to the suspended type double-drive track changing system, the safety is high, derailing in the vehicle running process is avoided by using the structure ofthe I-shaped track, and meanwhile, a rocker arm device is matched with guide wheels and a sub rail structure so that the influence of a lateral force on track changing is effectively inhibited; and therefore, safe and effective track changing is guaranteed.
Owner:LIAONING UNIVERSITY OF TECHNOLOGY
Offshore wind energy storing and conveying system for pneumatic power generation
InactiveCN112780492ALow costSolve storage problemsWind energy with garvitational potential energyWind motor supports/mountsWind drivenAir compressor
The invention discloses an offshore wind energy storing and conveying system for wind power generation. A plurality of offshore wind driven generators, a gas storage system and a pneumatic generator are included, the offshore wind energy storing and conveying system is a system through which offshore wind energy is converted into compressed air potential energy for storage and long-distance transportation, and the offshore wind energy is converted into kinetic energy for a fan blade shaft to drive an air compressor to work. According to the air transmission rate, reasonable water depth is selected to arrange a flexible air bag, constant-pressure compressed air with the same pressure as the water pressure is stored in the flexible air bag, sufficient compressed air is pressed to the pneumatic generator above the sea level through the constant water pressure, and the transmission rate and the air supply time can be accurately controlled, so that stable electric power output is obtained; and offshore wind energy is utilized to the maximum extent, the cost of offshore power generation and electric energy transmission is saved, and usage of underwater cables is replaced. An underwater flexible bag body stores energy online, the problem about wind power generation electric energy storage is solved, compressed gas is stably and continuously supplied, stable power output is guaranteed, and grid connection is easy.
Owner:连云港经纬复合新材料有限公司
Steam turbine and organic Rankine cycle fluid turbine dual-drive combined electricity generation or mechanical working equipment
ActiveCN106014519AImprove qualityRealize the function of reducing temperature and reducing pressureSteam engine plantsCooling towerOrganic Rankine cycle
The invention relates to a steam turbine and organic Rankine cycle fluid turbine dual-drive combined electricity generation or mechanical working equipment. The equipment is driven by a turbine expander, which distributes two different working media respectively through a converging type cylindrical gear box and cantilever structures for two input shafts, and transmits electricity or directly works through an output shaft. After passing through a steam turbine to enable the steam turbine to run to work, an organic Rankine cycle heat source, namely saturated steam, enters an evaporator to exchange heat with an organic working medium, then the organic working medium enters a working medium turbine to enable the working medium turbine to run to work, and finally the organic working medium returns to a condenser to finish an internal cycle through a working medium pump; and after exchanging heat with the organic working medium in the evaporator, the heat source steam returns to a cooling tower and then passes through a waste heat boiler or directly passes through the waste heat boiler to finish an external cycle. According to the equipment, a steam cycle system not only plays a role in utilizing a high-grade heat source but also plays a role in adjusting hear source parameter and improving the heat exchange efficiency of the evaporator, and an organic Rankine cycle plays a role in further utilizing a low-grade heat source to save energy and protect environment.
Owner:CHINA CHANGJIANG ENERGY CORP GROUP
FDD (Frequency Division Duplex) high-temperature superconducting RF (Radio Frequency) front end subsystem
The invention relates to a FDD (Frequency Division Duplex) high-temperature superconducting RF (Radio Frequency) front end subsystem, which comprises a duplexer, a high-temperature superconducting filter and a low-temperature low-noise amplifier and is characterized in that the duplexer is an unsymmetrical duplexer. The invention has the advantages that the original emitting channel filter characteristics of a conventional RF front end are kept, a receiving channel integrates the advantages of high frequency selectivity of the superconducting filter and low noise of the low-temperature low-noise amplifier, and the FDD high-temperature superconducting RF front end subsystem has the advantages of compact structure, excellent technological indexes, rapidness in parallel networking, and the like.
Owner:天津海泰超导电子有限公司
Harmonic monitoring control system based on multi-source microgrid
ActiveCN103956827AGuarantee the safety of electricity useExtended service lifeSingle network parallel feeding arrangementsSystems intergating technologiesPower qualityMicrogrid
The invention belongs to the technical field of a microgrid, relates to a harmonic monitoring control system based on a multi-source microgrid, in particular to wind power, photovoltaic and energy storage devices, and provides a microgrid harmonic monitoring control system based on data collection and analysis technologies. The system is mainly composed of a data collection module, a data storage and analysis module and a harmonic information display and control module. The data collection module is connected with the data storage and analysis module, and the data storage and analysis module is connected with the harmonic information display and control module. According to the system, the characteristic of independent distribution of a microgrid harmonic source can be fully used, the harmonic current level in the microgrid is effectively controlled, power supply quality of a microgrid user is improved, damage of harmonics to sensitive devices in the microgrid is reduced, the service life of the devices is prolonged, quality of power output by the microgrid is guaranteed, and grid-connected power generation benefits are improved. The system has good application prospects in a microgrid project containing multiple power electronic devices.
Owner:STATE GRID CORP OF CHINA +1
Power generation system
ActiveCN110645136AEasy to gridIncrease the proportion of consumptionPressure pumpsHydro energy generationHybrid systemNew energy
The invention discloses a power generation system which comprises a high pressure air system, a channel switching system, a gas-liquid mixing system, a fluid-power power generation system and a control system. The high pressure air system, the gas-liquid mixing system and the fluid-power power power generation system are connected through the channel switching system and are controlled by the control system; the control system changes operating states of the power generation system; the operating states of the power generation system are divided into an energy storage state and a power generation state: when at the energy storage state, the power generation system absorbs new energy electric energy from a power grid and converts the new energy electric energy into compressed air which is stored in the high pressure air system; and when at the power generation state, under the function of the control system, air energy is converted into electric energy through the high pressure air system, the gas-liquid mixing system the fluid-power power power generation system and the channel switching system. According to the power generation system provided by the invention, the phenomena of wind curtailment, light curtailment and water curtailment can be alleviated, and the problem of low consumption proportion of renewable energy sources caused by difficult renewable energy source grid-connection and difficult consumption after grid-connection is solved.
Owner:STATE GRID HUNAN ELECTRIC POWER +2
Wave power generation system based on tubular type permanent-magnet linear generator
InactiveCN106640505APromote absorptionEasy to design and debugMachines/enginesEngine componentsWave power generationSea waves
The invention relates to the technical field of sea wave power generation and linear movement power generation, in particular to a wave power generation system based on a tubular type permanent-magnet linear generator. The wave power generation system based on the tubular type permanent-magnet linear generator comprises a main panel and generator modules, wherein a plurality of motor grooves are formed in the main panel; the generator modules are inlaid in the motor grooves; each generator module comprises a primary stator, a secondary rotator and a central shaft; each primary stator is arranged on the inner wall of the corresponding motor groove; each central shaft is arranged in the center of the corresponding motor groove; each secondary rotor takes the corresponding central shaft as an axis and flows through the corresponding motor groove along with wave so as to drive the corresponding primary stator to move in the front-back direction in a reciprocating manner; and wave energy is converted into electric energy. The main panel is separated from the generator modules, design debugging and repair and maintenance in the future of an electrical control system are facilitated greatly, the power generation system is optimized, wave energy can be absorbed well, and the economic effect is good.
Owner:JIANGSU UNIV OF TECH
Mobile Photovoltaic Wave Power Ship
InactiveCN103821662BStrong complementarityStable power outputPhotovoltaic supportsWaterborne vesselsWave power generationMechanical energy
Owner:厦门中泰风电能源有限公司
Power generation system
ActiveCN110593963AEasy to gridIncrease the proportion of consumptionMachines/enginesEngine componentsNew energyHigh pressure
The invention discloses a power generation system. The power generation system comprises a high-pressure air system, a passage switching system, an air and liquid mixing system, a hydraulic power generation system and a control system; the high-pressure air system, the air and liquid mixing system and the hydraulic power generation system are connected through the passage switching system and arecontrolled by the control system; the control system changes the running state of the power generation system; the running states of the power generation system include an energy storage state and a power generation state; when the power generation system is in the energy storage state, the power generation system is used for absorbing new-energy electric power from an electric grid, transformingthe new-energy electric power into compressed air and storing the compressed air in the high-pressure air system; when the power generation system is in a power generation state, under the effect of the control system, the air energy is transformed into electric energy by virtue of the high-pressure air system, the air and liquid mixing system and the hydraulic power generation system. The power generation system ameliorates the problem that the consumption rate of renewable energy is low because the renewable energy is difficult to supply to the electric grid and is difficult to consume afterbeing supplied to the electric grid.
Owner:STATE GRID HUNAN ELECTRIC POWER +2
Wind power generation maximum power point tracing control method
InactiveCN105464902AExpand your searchHigh precisionWind motor controlMachines/enginesWind drivenClosed loop
The invention discloses a wind power generation maximum power point tracing control method. By analyzing the mathematical mechanism of a permanent magnet synchronous wind generating set, a reasonable direct-driven permanent magnet wind generating set complete model is established, a back-to-back full power converter is controlled through bivector space pulse width modulation signals, and active power output of the generator side is adjusted and the direct current voltage of the power grid side is adjusted to be constant through a double closed-loop control loop. By means of the wind power generation maximum power point tracing control method, in the environment of low wind speed which is rated wind speed, a function curve based on the relation between wind driven generator power and rotating speed is equivalent to an isosceles triangle during large-range rough adjustment, and then accurate adjustment is achieved nearby a peak value through a Gaussian function. Therefore, the searching speed and accuracy of a maximum power point can be guaranteed while the searching range is widened, and the wind energy utilization efficiency is advantageously improved.
Owner:SOUTHWEST PETROLEUM UNIV +1
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