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150results about How to "Guarantee the quality of power supply" patented technology
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Energy storage power supply cabinet and on-grid and off-grid power supply systems comprising the same
InactiveCN103872784AReduce the burden onQuality improvementElectrical storage systemSingle network parallel feeding arrangementsPower gridAC power
The invention discloses an energy storage power supply cabinet. The cabinet comprises: a storage battery set for storage and release of electric energy; an AC input wiring terminal, which is connected to an external AC power supply and is used for connection with the AC power supply; an energy storage bidirectional current transformer for charging or discharging the storage battery set; a control management system, which is connected to the storage battery set and the energy storage bidirectional current transformer and is used for monitoring charging and discharging status of the storage battery set and working status of the energy storage bidirectional current transformer and for monitoring and management of electric energy of the cabinet; and an AC output wiring terminal for connection with a load. The cabinet provided by an embodiment of the invention can work in an on-grid power supply system to ease the burden on a public power grid in a peak period of power use and ensure safe power use of users. The cabinet can also work in an off-grid power supply system to output high-quality stable electric power and ensure reliable and safe power supply. Besides, the cabinet can improve efficient usage of renewable energy. The invention further discloses an on-grid power supply system and an off-grid power supply system.
Owner:BEIQI FOTON MOTOR CO LTD
Non-stick overvoltage and under-voltage protector with leakage protection function
ActiveCN103311884AImprove safety performanceWith leakage protection functionArrangements responsive to excess voltageArrangements responsive to undervoltageOvervoltageCapacitance
The invention discloses a non-stick overvoltage and under-voltage protector with a leakage protection function. The non-stick overvoltage and under-voltage protector comprises a box body and a control unit, wherein the control unit comprises a power circuit (1), a current sampling circuit (2), a voltage sampling circuit (3), a microprocessor (4), a key processing circuit (5), a working state indicating circuit (6), a magnetic relay driving circuit (7), a magnetic latching relay (8), a leakage mutual inductor (9), an energy-storage capacitor (10) and a chip peripheral circuit (11). According to the non-stick overvoltage and under-voltage protector with the leakage protection function provided by the invention, a power supply is switched on automatically when the power voltage restores to a normal voltage range after an under-voltage protection action is taken, so that the continuity of power supply is ensured, and the power supply quality is ensured; and after a leakage protection action is taken, the power supply is switched on automatically after a fault is cleared and a manual key is pressed for confirming, the power supply continuity is ensured, and personal safety is protected.
Owner:SHANGHAI LIANGXIN ELECTRICAL
Realization method for function of adaptive load type distribution transformer
ActiveCN103474985AFunctionalImprove accuracyPolyphase network asymmetry elimination/reductionReactive power adjustment/elimination/compensationCapacitancePhase splitting
The invention provides a realization method for functions of an adaptive load type distribution transformer. The realization method comprises the following steps of setting adaptive load type distribution transformer motion constant values which include a three-phase load unbalance adjusting constant value, a phase-splitting reactive compensation constant value, a load capacitance-modulating current constant value and a load voltage-modulating voltage constant value, and according to the set adaptive load type distribution transformer motion constant values, performing three-phase load balance control, phase-splitting reactive compensation control, rated capacity operation model adjusting control and voltage tap shift adjusting control. The realization method fulfills an aim of adaptive loads by scientifically setting the load capacitance-modulating motion constant value and combining the three-phase load unbalance adjustment and phase-splitting reactive compensation strategy, helps to effectively reduce operation loss of the distribution transformer and low-voltage network wire loss, improve the economic operation level of the power distribution area and guarantee power supply quality to users.
Owner:STATE GRID CORP OF CHINA +2
Method and system for analyzing fault cause of distribution network line
PendingCN109655712AImprove timelinessRealize fine-grained analysisFault location by conductor typesAnalytic modelRelevant information
The invention relates to a method and system for analyzing the fault cause of a distribution network line. The method comprises the steps of obtaining data when a current line fails, and determining afault cause type based on the obtained data when the current line fails and a pre-built fault cause type analysis model; based on the fault cause type and a pre-built fault cause small type analysismodel, determining the cause of a line fault. The invention relates to the method and system for analyzing the fault cause of the distribution network line, the fault cause type is determined based onthe obtained data when the current line fails and the pre-built fault cause type analysis model, based on the fault cause type and the pre-built fault cause small type analysis model, the cause of the line fault is determined, the problem of human judgement affecting the timeliness of fault handling is solved, information related to the fault received by staff in a short time is often not comprehensive, a judgment is made according to the information, and the problem that the accuracy of analysis conclusions is affected is solved.
Owner:CHINA ELECTRIC POWER RES INST +3
DC line carrier communication device
InactiveCN101359933AGuarantee the quality of power supplyImprove interference abilityPower distribution line transmissionData transmissionData buffer
The invention discloses a DC line carrier communicator, which is characterized in that: the communicator consists of a transmitting unit and a receiving unit, wherein, the transmitting unit is provided with a modulator, a carrier generator, a data buffer, a push-pull driver and a low-pass filter; and the receiving unit is equipped with an amplitude limiter, a band-pass filter, a frequency selective amplifier, an emitter follower, an envelope detector, a voltage comparator and a voltage reference source. The invention has the advantages of: simple structure, low cost, providing high direct current of a few amperes to dozens of amperes to loads, ensuring the quality of power supply of current, and enhancing the anti-interference ability of the communicator and also the confidentiality of data transmission.
Owner:蒋富强
Apparatus and method of independent wind power driven seawater desalination
InactiveCN102219318AReduce capacityImprove the utilization rate of wind powerGeneral water supply conservationSeawater treatmentLoad circuitGrid-tie inverter
The invention discloses an apparatus and a method of independent wind power driven seawater desalination. The method comprises the steps that: step one, establishing an independent grid: an independent grid is established through a bi-directional inverter by using electric energy from a storage battery; step two, wind power grid-connecting: electric energy generated from each aerogenerator is delivered to the independent grid through aerogenerator controllers and grid-connecting inverters; step three, load connecting: water supplying pumps, high pressure pumps and reverse osmosis membrane components are connected to form independent membrane modules, load circuits of the independent membrane modules are connected in parallel, and then connected to an electric output of a power system; step four, system coordination dynamic controlling. Previously, wind power driven seawater desalination requires large capacity storage batteries for ensuring the stability of power supply. With the present invention, the technical problem is solved, and a novel independent wind power driven seawater desalination mode is provided. According to the present invention, energy cost in fresh water producing with the present apparatus is substantially lower than that with systems of other similar types. Thus, the apparatus and the method have good prospect to be developed and applied in the field of seawater desalination.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Power distribution network comprehensive assessment and analysis method based on multi-source data analysis
InactiveCN105678442AComprehensive assessmentEvaluation scienceResourcesInformation technology support systemWeight coefficientAnalysis method
The invention relates to a power distribution network assessment technology, in particular to a power distribution network comprehensive assessment and analysis method based on multi-source data analysis. The power distribution network comprehensive assessment and analysis method solves the problems that subjective randomness is high and assessment is difficult to quantify of the existing power distribution network assessment technology. The power distribution network comprehensive assessment and analysis method based on multi-source data analysis is implemented by adopting the steps of: 1) confirming a region to be assessed; 2) regarding an assessment criterion of an index as a threshold value according to basic data of a power distribution network within the region to be assessed, calculating a numerical value of the index, and calculating a score of the index according to the numerical value of the index and a scoring formula of the index; 3) and assessing operation level and power supply capacity of the power distribution network within the region to be assessed according to the score of the index and a weight coefficient of the index, and finding out a weak link of the power distribution network through analyzing an assessment result. The power distribution network comprehensive assessment and analysis method is applicable to the assessment of the power distribution network.
Owner:STATE GRID CORP OF CHINA +1
Transformer area load regulation and control method containing optical storage charging station
ActiveCN111799827AGuarantee the quality of power supplyMitigate the impact of access to the distribution networkPower network operation systems integrationAc network load balancingLow loadTransformer
The invention discloses a transformer area load regulation and control method containing an optical storage charging station, and the method comprises the steps: solving a district load regulation andcontrol multi-target model based on particle swarm optimization, and obtaining the optimal charging starting time of an electric vehicle user and the selected optical storage charging station; and according to the optimal charging starting time of the electric vehicle user and the selected optical storage charging station, guiding the electric vehicle with the charging requirement in the power distribution network to the selected optical storage charging station for charging under the optimal charging starting time. The beneficial effects of the method are that the method carries out the transformer area load regulation and control through combining with the characteristics of a charging load, alleviates the impact caused by the access of the optical storage charging station to a distribution network, and effectively guarantees the transformer area power supply quality; moreover, the method does not need investment of new equipment, and can effectively reduce the load regulation and control cost. 2) the responsivity and satisfaction of the load side are fully considered, the satisfaction is improved while the power demand of the user is ensured, and 3) the economic benefit and theenvironmental benefit are both considered, the load variance can be effectively stabilized, and the carbon emission is reduced.
Owner:JIANGSU ELECTRIC POWER CO +7
Power quality management method for active distribution network
InactiveCN110299705AGuarantee the quality of power supplyReduce lossAc network circuit arrangementsElectricityCollection system
The invention discloses a power quality management method for an active distribution network. The method comprises a step of grasping the output characteristics of distributed small hydropower and photovoltaic units through investigation, a step of integrating and analyzing the historical data of an electricity consumption information collection system by using big data mining technology, a step of performing the coordinated control of power quality, a step of performing power quality optimization, and a step of performing active power distribution. According to the method, the distribution network is hierarchically and regionally controlled based on an active distribution network radial structure, a distributed power source and a reactive power regulating device are fully used, the powerquality control of the active distribution network is achieved by using a top-down manner, the voltage is always in a safe interval, and the quality of the power supply is ensured.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JINHUA POWER SUPPLY CO
Construction method for replacing cross arm of 35kV line linear rod
ActiveCN102185265ASimple construction methodImprove securityApparatus for overhead lines/cablesUltimate tensile strengthIndustrial engineering
Owner:MIANYANG POWER SUPPLY COMPANY STATE GRID SICHUANELECTRIC POWER +1
Optical storage and charging microgrid system and control method thereof
PendingCN111775756AReduce energy lossImprove economyBatteries circuit arrangementsCharging stationsEnergy lossPower grid
The invention provides an optical storage and charging microgrid system and a control method thereof. The optical storage and charging microgrid system comprises a photovoltaic power generation unit,an energy storage unit, a photovoltaic controller, an energy storage converter and a grid-connected and off-grid switching unit, the photovoltaic power generation unit is connected with a direct current bus through the photovoltaic controller, an energy storage battery and the energy storage converter are connected with the direct current bus, and a charging pile is directly hung on the direct current bus to form a direct current network; wherein the energy storage converter is connected with a power grid and a load through the grid-connected and off-grid switching unit to form an alternatingcurrent network; the photovoltaic controller is used for controlling the photovoltaic power generation unit to charge the energy storage unit; and the grid-connected and off-grid switching unit is used for realizing grid-connected and off-grid state switching of the energy storage converter. By adopting the technical scheme of the invention, the energy loss is reduced, the economy is improved, thegrid-connected and off-grid seamless switching is realized, and the power supply quality of the system is ensured; and when the power grid is powered off or abnormally fluctuates, off-grid operationcan be fully automatically realized, and uninterrupted development of optical storage and charging services is ensured.
Owner:SHENZHEN KSTAR NEW ENERGY CO LTD
Power supply control cabinet system and operation method thereof
ActiveCN103576651AGuarantee safety and qualityGuarantee the quality of power supplyTotal factory controlProgramme total factory controlAC - Alternating currentInput control
The invention provides a power supply control cabinet system and an operation method of the power supply control cabinet system. The power supply control cabinet system comprises a central processing unit module, a network module, a signal collection module, a displayer, an input terminal, a power input module, a power output module and a power supply switching module, wherein the power input module comprises a plurality of input channels, the power output module comprises a direct-current output module and an alternating-current output module, and the power supply switching module is connected with the power input module and switches a corresponding power supply loop into a system circuit according to user hand-operated selection or system presetting or a signal analysis result. By means of real-time monitoring of a central processing unit and a signal collection device, the defect that a traditional control cabinet is low in control accuracy is overcome in terms of input control and output control of power supplies, the situation that the over-current and the under voltage happen to circuit and other situations can be timely prevented, safety performance of a circuit system is effectively ensured, and meanwhile power supply safety and power supply quality of the system is ensured by setting multiple modes to conduct selection and switching on the power supplies.
Owner:南京三一光电科技有限公司
Three-phase variable leakage current protective device
InactiveCN102593802ARealize leakage protection functionRealize leakageEmergency protective arrangements for automatic disconnectionElectricitySquare waveform
The invention discloses a three-phase variable leakage current protective device, belonging to the field of protective devices used for protecting safeties of persons and electrical apparatuses. The device comprises a slowly-changing signal forming circuit, a signal amplifier circuit, a memory circuit, a clock circuit, a phase variable decomposer circuit, a positive / negative leakage current identifier circuit, a 150Hz square wave, an action current presetting device circuit, a break-time presetting device circuit, a time delay monostable circuit, a switch on / off mechanism and a self-restoring time presetting device circuit. Compared with the prior art, the three-phase variable leakage current protective device has the advantages that: the break time can reach the standard and no override trip occurs, no negative leakage trip occurs, the self-restoring mode is randomly selected by users according to local situations, special testers are configured, the power-on test is realized, and the like.
Owner:淄博开发区东方电力器材厂
Active dynamic compensation device and distribution transformer integrated monitoring method
ActiveCN105846545AGood application effectImprove economyCircuit arrangementsSustainable buildingsDistribution transformerIntegrated monitoring
An active dynamic compensation device and distribution transformer integrated monitoring method is disclosed. A monitoring terminal conducts on-site data acquisition analysis and control, and a monitoring background conducts running state monitoring and early warning. The monitoring background is formed by a communication server, a WEB / data storage server, a work station and a network isolation device, wherein the monitoring background communicates with the monitoring terminal through a GPRS communication means. The on-site type monitoring terminal monitors real-time electric quantity data and quasi-real time non-electric quantity data, wherein the real-time electric quantity data include reactive power, harmonic current, negative phase-sequence current, zero sequence current and three-phase voltage at the low-voltage outlet of a distribution transformer and the load side, and the monitored quasi-real time electric quantity data include shift, oil level, vibration, noise and oil temperature information of the distribution transformer, and the module state and module temperature information of the active dynamic compensation device. Integrated monitoring of the active dynamic compensation device and the distribution transformer can be completed, and the application effect of the active dynamic compensation device and the economic performance and reliability of the distribution transformer are improved.
Owner:STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
Wind power generation and thermal power generation set group load coordinated control system and method
ActiveCN107769275AChange the actual outputEvenly loadedLoad forecast in ac networkSingle network parallel feeding arrangementsElectricityLoad instruction
The invention discloses a wind power generation and thermal power generation set group load coordinated control system and method. The system comprises a wind power generation load change calculationmodule, a thermal power generation load dynamic compensation instruction calculation module and a thermal power generation set group dynamic adjustment module. The wind power generation load change calculation module is used for calculating the wind power generation load change quantity. The thermal power generation load dynamic compensation instruction calculation module is used for calculating the compensation load instruction of the thermal power generation set group when the wind power generation load changes according to the wind power generation load change quantity. The thermal power generation set group dynamic adjustment module dynamically adjusts the power generation load set value of the thermal power generation set according to the compensation load instruction of the thermal power generation set group. The actual output of the thermal power generation set group can be changed by dynamically adjusting the power generation load set value of the thermal power generation set according to the wind power generation load change quantity so that the load stability of the regional power grid can be maintained and the power supply quality of the power grid can be enhanced.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
Reactive continuous compensation control method for thyristor switched filter
ActiveCN104393605ATimely control signalNo false triggersReactive power adjustment/elimination/compensationReactive power compensationEngineeringPower electronics
The invention discloses a reactive continuous compensation control method for a thyristor switched filter and belongs to the technical field of application combining power electronics and electric energy quality control, so as to solve the problem that reactive over compensation is likely to happen due to discontinuous reactive compensation of the thyristor switched filter in the prior art. The method of the invention adopts switching of the thyristor switched filter to carry out reactive compensation control on the system, and the system is provided with three fifth harmonic filtering channels TSF1, TFS2 and TSF3 and a seventh harmonic filtering channel TSF4. The method comprises the following steps: three phases of voltage signals ua, ub and uc and three phases of current signals ia, ib and ic are acquired; after the signals are conditioned, the signals are sent to a DSP control chip; in the DSP control chip, seventh harmonic current and fifth harmonic current are acquired; and the switching state of each harmonic filtering channel is determined.
Owner:北京锌科能源技术有限公司
Intelligent monitoring system for electric power channel environment based on LoRa technology
PendingCN110412926AImprove operating conditionsImprove the operating environmentProgramme controlMeasurement devicesElectric power transmissionAmbient intelligence
Owner:西安瑞宝电子科技有限公司
Electric energy extracting device for cable partial discharge on-line detection
ActiveCN103248134AEnsure safetyEliminate the restrictions on the required location of power extractionBatteries circuit arrangementsElectromagnetic wave systemRechargeable battery packEngineering
The invention discloses an electric energy extracting device for cable partial discharge on-line detection. The device comprises a clamp-on transducer, a controlled rectifier and a rechargeable battery pack. When the device is used for field inspection, the clamp-on transducer of the device is connected at any position along a to-be-detected cable in a sleeving manner and can be used for inducing three-phase alternating current. The induced three-phase alternating current is sent to the controlled rectifier for rectifying, and the rectified DC can be used to charge the rechargeable battery pack, so as to provide a high-quality power supply to a load. The controlled rectifier comprises a control center, the control center samples the rectified DC voltage and compares the rectified DC voltage with the voltage of the rechargeable battery pack in real time, and through the adjustment of the conduction angle of the controlled rectifier, and the rectified DC voltage can be adjusted so as to ensure constant rectified DC voltage. According to technical scheme disclosed by the invention, the device can take electric energy any position on the cable between a switch cabinet and a terminal device and can provide the high-quality power supply for the load.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD +1
Photovoltaic power generation system with grid-connected generation, independent power generation and UPS function
ActiveCN101345500BGuarantee the quality of power supplyBatteries circuit arrangementsPV power plantsPower gridWorking environment
The invention discloses a photovoltaic generation system with grid-connected generation, independent generation and UPS functions mainly comprising a solar cell array, a DC / DC insulation conversion and control device, a maximum power point control module, an energy storage device, a cell charge-discharge control module, a grid-connected / independent / UPS function conversion and control module, an auxiliary power and a communication and display device, wherein the grid-connected / independent / UPS function conversion and control module mainly accomplishes the conversion of the three functions suchas grid-connected generation, independent generation and uninterruptible power supply and the judgment for automatic conversion condition. The three functions of grid-connected generation, independent generation and UPS are achieved due to the adoption of software judgment and control means without increasing any hardware cost, furthermore the three functions can automatically work at some optimum state according to the different work environment conditions and power conditions, thereby reducing the maintenance quantity of the device by users, making the photovoltaic energy fully played and providing powerful guarantee for the power supply of the users.
Owner:GUANGDONG ZHICHENG CHAMPION GROUP +1
Capacitance monitoring method of modular multilevel converter based on full-bridge sub-module
ActiveCN110995036ASave computing resourcesEasy to implementAc-dc conversionCapacitor voltageControl theory
The invention discloses a capacitance monitoring method of a modular multilevel converter based on a full-bridge sub-module. The method comprises the steps of: selecting two redundant sub-modules froma certain bridge arm of the modular multilevel converter as reference sub-modules; and collecting a bridge arm current and capacitor voltage data of each sub-module on the bridge arm, monitoring capacitor voltage increments of the reference sub-modules and each sub-module in a power frequency period, and obtaining the capacitance of each sub-module capacitor on the bridge arm by utilizing the capacitance of the reference sub-modules, the capacitor voltage increments and the capacitor voltage increments of the sub-modules. According to the method provided by the invention, the capacitance value of each sub-module capacitor is determined through the ratio of the capacitor voltage increments, so that the capacitance in each sub-module of the modular multilevel converter can be effectively monitored.
Owner:SOUTHEAST UNIV
Integrated switched reluctance machine flywheel energy storage device
InactiveCN101860114AReduce noiseReduce frictionMechanical energy handlingPower inverterManufacturing technology
The invention relates to an integrated switched reluctance machine flywheel energy storage device, belonging to the technical field of the design and preparation of the electric motor. The flywheel energy storage device comprises a switched reluctance machine and a bidirectional power inverter connected with the output end of the electric motor, wherein the outside of the switched reluctance machine is provided with a vacuum shell, the inside of the shell is provided with a stator, a rotor, an upper magnetic suspension bearing and lower magnetic suspension bearing used for supporting the rotor; the switched reluctance machine has an external rotor structure, the rotor is also used as the flywheel, a rotary inner bushing is fixed between the rotor and the stator, and a rotary outer bushing is fixed between the rotor and the vacuum shell. The device of the invention cancels the intermediate transmission unit through which the traditional flywheel is connected with the electric motor in the coupling manner and the like, thus reducing the noise and friction of the system and increasing the efficiency and reliability of the system.
Owner:TIANJIN UNIV
DC uninterrupted power supply system and power supply method
PendingCN108173266AGuaranteed continuityGuaranteed reliabilityAc network circuit arrangementsEmergency power supply arrangementsElectricityUninterruptible power supply
The invention discloses a DC uninterrupted power supply system and a power supply method. The power supply system comprises a battery pack, a charger and at least one power supply device, wherein thecharger is connected between an output end of the power supply device and an input end of the battery pack in series; the output end of the power supply device is connected with an external output end; a first switch and a first thermistor are connected between the output end of the battery pack and the external output end in series; and the power supply method of using the power supply system comprises the following steps of (1) outputting DC through the external output end by adopting at least one external power supply mode; and (2) when detecting an instantaneous power failure of external power supply input, turning on the first switch within first time, and then turning on a second switch after second time and carrying out uninterrupted power supply through the battery pack. Through the DC uninterrupted power supply system and multiple power supply strategies disclosed by the invention, the reliability of DC power supply can be effectively improved and the power supply quality is effectively ensured.
Owner:BEIJING INST OF SPACE LAUNCH TECH +1
Digitalized active power regulating energy-saving device
InactiveCN1665096ATimely responseGuarantee the quality of power supplyPolyphase network asymmetry elimination/reductionAc network voltage adjustmentControl signalPower grid
The invention relates to a digital active regulating energy-saving device, comprising measuring circuit with induction component, control circuit and main circuit with inverter and switching device, where the signal collecting end of the measuring circuit is coupled with the electric network, the feedback end of the measuring circuit is connected with the signal input end of the control circuit, the compensating current output end of the main circuit is connected with the electric network, too, and it is characterized in that: the control circuit comprises master control DSP chip and RAM connected with the DSP; and that the control signal output end of the control circuit is connected with the inverter driving end of the main circuit and the controlled end of the switching device. The invention organically integrates active regulating device with synthetic electric-energy quality analyzer and can in time make a response, implementing high accuracy active regulation and assuring power supply quality.
Owner:JIANGSU FANGCHENG ELECTRIC SCI & TECHCO
Electricity generator monitoring system device
InactiveCN101158865APracticalReliableBatteries circuit arrangementsDigital computer detailsElectricityRemote control
The invention relates to a generator monitoring system device, comprising a common generator at the bottom. The common generator is connected with a transmission equipment at the second layer through a sensor module. The transmission equipment at the second layer is mutually connected with a monitoring management computer at the third layer and a monitoring management module independently assembled inside the monitoring computer. The device is able to carry out the data real-time collection, remote control (such as remote power generation, etc.) and analysis and statistic of the data to the common generator, which facilitates the maintenance and management, saves the manpower, material resource and financial resource, and ensures the quality of the power supply.
Owner:CHINA MOBILE GRP FUJIAN CO LTD
Supercritical CO2 Brayton cycle power generation system coupled with CO2
ActiveCN107387179AStable outputLower regulation pressureSteam engine plantsPump installationsHigh pressureLoad following power plant
The invention discloses a supercritical CO2 Brayton cycle power generation system coupled with CO2. The supercritical CO2 Brayton cycle power generation system is formed by a Brayton cycle power generation unit and a CO2 energy storage unit, wherein the Brayton cycle power generation unit comprises a high temperature regenerator, a combustor, a turbine, an electric generator, a low temperature regenerator, a cooler I and a compressor I; and the CO2 energy storage unit comprises a low pressure air reservoir, a cooler II, a compressor II and a high pressure air reservoir. The CO2 energy storage unit in the power generation system can store unstable energy resources in a form of supercritical CO2, when the power demand is high, stored high temperature and high pressure supercritical CO2 stably acts to supply power through Brayton cycles, stable output of electric energy is well achieved, and thus the supercritical CO2 Brayton cycle power generation system coupled with the CO2 energy storage unit can further save energy, reduce the wind and light discharging rate, improve day and night load regulation stability and realize energy conservation and emission reduction.
Owner:SOUTHEAST UNIV
Production Technology of Frequency Conversion Cable Used in Coal Mine
InactiveCN109166677AReasonable structural designStable arrangementCable/conductor manufactureInterference resistanceFrequency conversion
The invention discloses a production process of a frequency conversion cable for a coal mine, comprising the following steps of: determining a cable structure; 2, respectively produce a power core, acontrol core and a filling core, and then forming that cable into a cable core; 3, squeeze that inner sheath out of the cable core; 4, manufacture a shielding layer by an inn sheath; 5, squeeze that outer sheath out of the shield layer. The cable structure of the invention is reasonable in design and stable in arrangement, and the produced cable has excellent anti-interference characteristics, voltage impulse resistance, wear resistance, tear resistance and flame retardancy, and the cable is flexible and easy to bend, and is particularly suitable for use in coal mine roadways with bad conditions.
Owner:FAR EAST CABLE +2
Surface-protection type switching station fault judging method
InactiveCN1885663AImprove operational reliabilityThe method is simple and fastEmergency protective circuit arrangementsCurrent sensorDecision methods
The related fault decision method for switching station of 12KV-40.5KV power supply system comprises: starting current sensor to send fault signal to a PLC to decide the current source as logic order; for fault from switching station, sending fault current signal criterion as '1', or else as '0' to PLC; using PLC to obtain conclusion: breaking the switch with criterion as '1' and away nearest distance to one with criterion as '0'. This invention has well accuracy on decision, and convenient to maintain.
Owner:郭建厂
Automatic switching control device for photovoltaic micro-grid power generation system
InactiveCN105048507ALow costReduce the number of failuresSingle network parallel feeding arrangementsSystems intergating technologiesOptimal combinationPower grid
An automatic switching control device for a photovoltaic micro-grid power generation system comprises a measurement control unit, a 4G wireless communication network, and a background decision system. The measurement control unit is connected to the background decision system through the 4G wireless communication network. Through the 4G wireless communication network, the measurement control unit sends grid information data to the background decision system, and / or the background decision system issues an instruction to the measurement control unit. According to the device, the whole grid is taken into consideration, multiple power parameters are detected, a decision is made based on the multiple power parameters and a background expert resource library, and a photovoltaic system with the optimal combination is connected to the grid for operation. Therefore, energy waste is avoided, and the quality of electric energy is ensured.
Owner:SUZHOU CHIEN SHIUNG INST OF TECH
Control method for adjusting reactive voltage of power distribution network to ensure electric energy quality of low-voltage region
InactiveCN107565575AGuarantee power qualityGuarantee the quality of power supplyAc network voltage adjustmentReactive power compensationCapacitanceLow voltage
The invention relates to a control method for adjusting the reactive voltage of a power distribution network to ensure the electric energy quality of a low-voltage region. The method comprises the steps of 1) applying the load prediction, analyzing a next-day load demand parameter, analyzing and determining the type of each load, and establishing a load model; 2) applying the load prediction, analyzing the next-day terminal voltage information of a feeder line of a power distribution network, determining a voltage drop limit value and a voltage expected value, and determining the tapping pointof a grading voltage regulator and a to-be-switched capacitance value; 3) based on the capacitance value obtained through prediction, preparing a capacitor in advance; 4) when an intraday load is increased, adjusting the tapping point of the voltage regulator is real time or a switched capacitor to compensate the reactive power shortage. According to the invention, the next-day load prediction data is adopted as a basis, and the required value of the capacitor is prepared in advance. When the intraday load is increased, the well prepared capacitor is put into use. Therefore, on the premise that the voltage drop is ensured to be within an expected range, the power supply quality is guaranteed.
Owner:STATE GRID TIANJIN ELECTRIC POWER +1
Big data visualization-based intelligent monitoring method for power transformation and distribution station and cloud monitoring platform
ActiveCN113091832ALow running costReduce maintenance costsMeasurement devicesSmart surveillanceTransformer oil
The invention discloses a big data visualization-based intelligent monitoring method for a power transformation and distribution station and a cloud monitoring platform, and the method comprises the steps of: carrying out the position numbering of each transformer cabinet in an indoor power transformation and distribution station, acquiring the oil level of a transformer in each transformer cabinet, and comparing and analyzing whether the transformer in each transformer cabinet needs to be refueled or not, informing a worker to perform refueling processing on the transformer needing refueling, at the same time detecting the transformer oil temperature in each transformer cabinet and each quality index numerical value of a transformer oil sample, and performing comparison to obtain the transformer oil temperature difference value in each transformer cabinet and the difference value of each quality index numerical value of the transformer oil sample, detecting the operation sound decibel of each transformer cabinet, calculating the comprehensive operation safety influence coefficient of each transformer cabinet, performing comparison with a set operation safety influence coefficient threshold value, and screening the position number of each transformer cabinet in a dangerous operation state and performing display, thus improving the operation safety and reliability of the transformer cabinet in the indoor power transformation and distribution station.
Owner:SHANGHAI SHENGXIANG SCI & TECH
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