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31results about How to "Reflect running status" patented technology
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Space-domain sector classification method based on complexity assessment
ActiveCN102855778AReflect running statusObjective reflectionAircraft traffic controlFlight dataStability index
The invention discloses a space-domain sector classification method based on complexity assessment. The space-domain sector classification method includes creating a time-domain sector point-link type structure model to assess the complexity of sectors by using radar track data and simulation flight data in a sliding time window mode; computing critical complexity, current complexity and stability indexes of the sectors; and dynamically clustering and analyzing according to the relevant indexes to classify the space-domain sectors. The space-domain sector classification method has the advantages that space traffic situation can be objectively, truly and integrally reflected by the characteristics of the complexity of the sectors, the sectors are transversely compared and classified by a k-Means dynamic clustering and analyzing method, and guidance and basis for managing the sectors and making relevant decisions are provided.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Bearing fault diagnosis method based on quantum genetic algorithm optimized support vector machine
InactiveCN106053067AReflect running statusStable performance of fault diagnosisMachine bearings testingQuantum genetic algorithmDiagnosis methods
A bearing fault diagnosis method based on a quantum genetic algorithm optimized support vector machine of the invention comprises the following steps: (1) acquiring a vibration signal of a bearing; (2) calculating dimensionless indexes; (3) optimizing model parameters C and Sigma of a support vector machine based on a cloud model quantum genetic algorithm; (4) training a support vector machine model; (5) performing fault diagnosis using the support vector machine model; and (6) outputting a bearing fault diagnosis result. The bearing fault diagnosis method of the invention has the advantage of high diagnosis accuracy. A new method is provided for solving the problem of bearing fault diagnosis.
Owner:GUANGDONG UNIV OF PETROCHEMICAL TECH
Online monitoring system and method of heat transfer coefficient and fouling resistance of steady heat exchange process
InactiveCN106872514AReflect running statusReal heat transfer statusMaterial heat developmentEngineeringDisplay device
The invention provides an online monitoring system and method of a heat transfer coefficient and fouling resistance of a steady heat exchange process and belongs to the field of heat exchange. The online monitoring system comprises a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a flow meter, a central processing unit and a display device; the online monitoring method adopting the system comprises the following steps: 1, at an operation initial state of a heat exchange system or after the heat exchange system is washed, determining a standard heat transfer coefficient K[0] under the condition that no dirt is deposited at a cold side of a heat exchanger; 2, according to production requirements, calculating a detected heat transfer coefficient K[time] in real time after the heat exchanger is operated; 3, calculating the fouling resistance. According to the system and the method, provided by the invention, the measured heat transfer coefficient and fouling resistance can effectively reflect a real heat exchange condition of a reaction system; a lot of data is accumulated to establish a data set of the heat exchanger; a data foundation is laid for long-time stabilization of the heat exchanger; the construction cost of system equipment is low and an application range is wide.
Owner:沈阳艾柏瑞环境科技有限公司
High-frequency partial discharge detector calibration system and calibration method thereof
ActiveCN105223530ARealize regular inspectionFacilitate regular inspectionElectrical measurementsCurrent sensorFrequency modulation
The invention discloses a high-frequency partial discharge detector calibration system and a calibration method thereof. The system comprises a frequency modulation and amplitude modulation signal generator, a power-frequency current generator, a standard partial discharge signal generator, a signal conditioning module, a coaxial cable, a matching impedor, an oscilloscope, and a central control unit. The calibration method comprises the steps like calibrating the saturation characteristic of a high-frequency partial discharge detector. The amplitude and frequency of the frequency modulation and amplitude modulation signal generator are easy to adjust. The performance calibration requirement of high-frequency partial discharge detectors and high-frequency current sensors thereof can be satisfied. The problem on performance calibration of high-frequency partial discharge detectors and high-frequency current sensors thereof can be solved effectively and in a unified way. Regular inspection of high-frequency partial discharge detectors can be implemented easily. Good performance of high-frequency partial discharge detectors is ensured. The running status of electrical equipment can be reflected effectively. The system and the method of the invention have the advantages of accurate and reliable test results and easy implementation.
Owner:STATE GRID CORP OF CHINA +2
Relay protection system risk assessment method based on Markov reliability correction model
The invention provides a relay protection system risk assessment method based on a Markov reliability correction model. The steps of the method include first obtaining relay protection system operation state information extracting relay protection operation influence parameters, and utilizing an analytic hierarchy process to assess state quantity weights; then calculating possible loss and failure probability according o a relay protection device possible loss model and failure probability model; performing correction processing on the obtained failure probability on the basis of the Markov reliability correction model; and finally obtaining a risk value quantifying a system risk level by a relay protection system risk assessment model. The relay protection system risk assessment method based on the Markov reliability correction model extracts the influence parameters hindering normal operation of the relay protection system, sets the state quantity weights according to the analytic hierarchy process, builds the scientific and reliable risk assessment model based on the Markov correction model, and thus can visually reflect the relay protection system operation state.
Owner:ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
Distribution transformer abnormal state detecting method based on vibration-sound correlation
PendingCN110221137AIntuitively reflect the running statusReflect running statusSpectral/fourier analysisSubsonic/sonic/ultrasonic wave measurementDistribution transformerFrequency spectrum
The invention discloses a distribution transformer abnormal state detecting method based on vibration-sound correlation analysis. A fusion curve of main spectral components of a signal correlation function is obtained by collecting a current signal, a vibration signal and a sound signal of a distribution transformer and processing the signals; and the abnormal state of the distribution transformeris detected efficiently and accurately through the correlation degree between the fusion curve and a historical fusion curve.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO
Power equipment safety analysis system based on ultraviolet spectrum technology
ActiveCN108344931ATruly reflect the running statusReflect running statusTesting using optic methodsData acquisitionUltraviolet
The invention provides a power equipment safety analysis system based on ultraviolet spectrum technology. The system comprises an identification module, an analysis module and a comprehensive determination module which are successively connected, wherein the identification module comprises an image acquisition client, an environmental parameter acquisition end, and a data concentrator connected with the image acquisition client and the environmental parameter acquisition end. The analysis module includes an image intelligent security indication unit and a communication unit connected thereto.The comprehensive determination module includes a security indication unit and a display unit. The data concentrator is connected to the image intelligent security indication unit. The image acquisition client comprises an ultraviolet imaging device, a data acquisition card and a visible light sensor. The environmental parameter acquisition end comprises a temperature and humidity sensor, an eddycurrent sensor, a wind sensor, a voltage sensor and a current sensor. The power equipment safety analysis system, by identifying the ultraviolet spectrum of the power equipment, identifying the equipment identification and considering the influencing factors of the environmental parameters, establishes a comprehensive analysis safety database and realizes the safety analysis of the power equipment.
Owner:ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
Online monitoring and comprehensive early warning method for tailing pond
PendingCN112767655AReflect running statusEfficient use ofAlarmsEarly warning systemEnvironmental engineering
The invention provides an online monitoring and comprehensive early warning method for a tailing pond. Real-time monitoring data are obtained online through a rainfall monitoring module, a dry beach monitoring module, a water level monitoring module and a seepage line monitoring module; under the condition of considering various accident risks of the tailings pond, the monitoring data are fully utilized to construct a tailings pond multi-stage comprehensive early warning system; and the obtained real-time monitoring data of the tailings pond is processed, and is compared with a safety parameter threshold value of the tailings pond so as to determine the running condition and the safety early warning level of the tailings pond. According to the method, monitoring data can be effectively utilized, the early warning result is reliable, the feasibility is high, the running state of the tailings pond is reflected from multiple aspects, and reliable technical support is provided for safe running of the tailings pond.
Owner:NANCHANG UNIV
Method for constructing digital twin system and computing device
PendingCN113343500AComprehensive Analysis and ForecastingAchieve interactionDesign optimisation/simulationSpecial data processing applicationsAcquisition apparatusDevice type
The invention discloses a method for constructing a digital twin system, which comprises the following steps of determining a plurality of equipment types, and respectively establishing an equipment model corresponding to each type of equipment, namely establishing a component model corresponding to each structural component of the equipment; establishing a measuring point model corresponding to each structural component of each type of equipment; building a monitoring model corresponding to each type of equipment based on the working condition attribute and the environment attribute of the equipment; establishing a fault model corresponding to each equipment model, wherein the fault model comprises one or more fault indexes corresponding to the equipment model; and based on the equipment model, the corresponding measuring point model, the monitoring model and the fault model, constructing a digital twin system corresponding to the equipment so as to collect state data of each component model in the equipment model according to the corresponding measuring point model and the monitoring model, and determining fault information of the equipment according to the fault model. The invention also discloses corresponding computing equipment.
Owner:ANHUI RONDS SCI & TECH INC CO
On-line evaluation method and system for operation state of electric energy metering system in electric power spot market
PendingCN113608975AReduce subjective blindnessReduce the impactHardware monitoringReliability/availability analysisOnline evaluationElectric energy
The invention provides an on-line evaluation method and system for an operation state of an electric energy metering system in an electric power spot market, and the method comprises the steps: constructing an electric energy metering system operation state evaluation model in the electric power spot market, wherein the model comprises a data level index and a system level index; on the basis of the evaluation model, online obtaining index data of the electric energy metering system, performing standardization processing on the obtained quantitative index data, calculating a quantitative index membership degree, processing a qualitative index, and calculating a qualitative index membership degree; constructing a fuzzy relation matrix based on the quantitative index membership degree and the qualitative index membership degree; constructing a fuzzy judgment matrix by evaluating data level indexes and system level indexes in the evaluation model, and calculating single-layer index weights and combined index weights in sequence; and performing fuzzy comprehensive evaluation on the operation state of the electric energy metering system based on the combined index weight and the fuzzy relation matrix, and outputting an evaluation result online in real time. According to the method, fuzziness of evaluation thinking of people can be reflected, and subjective blindness when a judgment matrix is constructed is reduced.
Owner:国网山东省电力公司营销服务中心(计量中心) +3
Health state evaluation method, system and equipment of numerical control machine tool and medium
PendingCN114693143AEnable predictive maintenanceEnable accurate predictive maintenanceResourcesManufacturing computing systemsNumerical controlAnalytic model
The invention relates to a health state evaluation method, system and device for a numerical control machine tool and a medium, and the method comprises the steps: training model parameters of a health state analysis model based on each pre-obtained training sample data set, and calculating a corresponding likelihood probability, forming a preset model parameter set representing different preset working condition states of the machine tool by each group of trained model parameters, and forming a preset likelihood probability set by each likelihood probability; and based on the obtained preset model parameter set and the preset likelihood probability set, evaluating the health state of the current numerical control machine tool. According to the method, the historical monitoring data of the numerical control machine tool is utilized to construct the multi-dimensional data vector, the health state of the numerical control machine tool is evaluated by calculating the health degree, the number of machine tool sensors does not need to be increased, the model has wider practicability, the calculation complexity is reduced, and accurate, rapid and real-time health degree evaluation is achieved; the method can be widely applied to the numerical control machine tool health state monitoring field.
Owner:BEIJING UNIV OF TECH
Wireless remote monitoring system for zinc oxide arresters
InactiveCN110211354AReflect running statusEnsure power supply reliabilityTransmission systemsGeneral Packet Radio ServiceData acquisition
The invention discloses a wireless remote monitoring system for zinc oxide arresters. The system comprises field collection modules, transmission and display modules and a remote monitoring center, wherein the field collection modules are used for sending signals to the remote monitoring center to form data reports and comprise core processors; the core processors are used for detecting resistivecurrents of the arresters in real time; the transmission and display modules are used for transmitting the data of the arresters, which are collected by the field collection modules, to the remote monitoring center, processing and displaying the data; and the remote monitoring center comprises information management system software and is used for carrying out data monitoring on the arrester states in real time and querying and analyzing the data. The system has the beneficial effects that a reasonable MOA (Metal Oxide Arrester) online monitoring model is constructed and interference sources can be removed to ensure that measurement results can accurately reflect the real operating states of the arresters; and by combining with GPRS (General Packet Radio Service) technology and the data collection terminal, the data are collected and transmitted to the remote monitoring center.
Owner:LINQU POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO +1
Fire drill method and system based on digital twinning
PendingCN114330024AReal-time mappingReflect running statusData processing applicationsDesign optimisation/simulationModelSimArchitectural engineering
The invention discloses a fire drill method and system based on digital twinning, and the method employs a digital twinning technology and a BIM modeling technology to construct a digital twinning model of a building, and achieves the real-time mapping from a real world to a virtual world. Therefore, the operation states of fire-fighting facilities, security and protection facilities and public facilities in a building and the motion state of personnel can be reflected visually and truly in real time, and a real world scene can be simulated more truly. When the digital twin model is used for fire drill, only a small amount of manpower and material resources need to be invested during scheme design and drill preparation, and the fire drill cost is greatly reduced; the digital twinborn model is repeatedly used for fire-fighting drilling, so that the fire-fighting drilling cost is further reduced, a social unit can better master four fire-fighting capabilities, and fire accidents are reduced and even avoided.
Owner:江苏有熊安全科技有限公司
PowerSubstation equipment state evaluation method based on multi-physical-quantity fusion analysis transformation equipment state evaluation method and system based on multi-physical-quantity fusion analysis
PendingCN110189055AStatus Assessment ImplementationReflect running statusCharacter and pattern recognitionResourcesAssessment methodsFuzzy analytic hierarchy process
The invention discloses a substation equipment state evaluation method based on multi-physical-quantity fusion analysis. The substation equipment state evaluation method comprises the following steps:collecting a plurality of physical quantity signals representing the state of substation equipment by adopting a sensor; based on the historical data of each physical quantity signal, calculating theweight of each physical quantity signal when judging the state of the power transformation equipment by adopting a fuzzy analytic hierarchy process and an anti-entropy weight method to obtain a firstweight and a second weight; fusing the first weight and the second weight to obtain a fusion weight of each physical quantity signal; obtaining the relative degradation degree of each physical quantity signal based on each physical quantity signal to be detected at present and the respective corresponding standard value; converting each relative degradation degree into a fuzzy membership degree of each state of the power transformation equipment corresponding to each physical quantity signal to be detected at present; and based on the fuzzy membership degree and the fusion weight, obtaining the membership degree of the power transformation equipment to each state, and evaluating the state of the power transformation equipment according to the maximum membership degree principle.
Owner:STATE GRID HEBEI ELECTRIC POWER RES INST +2
Wind power plant group health state assessment method
PendingCN114548697ATake advantage ofReduce workloadResourcesInformation technology support systemControl theoryWind power
The invention discloses a wind power plant group health state evaluation method. The method comprises the following steps: 1) establishing a state evaluation model of a flagship wind turbine generator; 2) obtaining a state evaluation model of the common wind turbine generator; 3) acquiring data of the flagship wind turbine generator and the common wind turbine generator, and respectively inputting the data into the state evaluation models of the flagship wind turbine generator and the common wind turbine generator to obtain operation states of the flagship wind turbine generator and the common wind turbine generator; 4) calculating to obtain a group operation state evaluation result according to the operation states of the flagship wind turbine generator and the common wind turbine generator in one group; and 5) according to all group state evaluation results, calculating to obtain an operation state evaluation result of the to-be-evaluated wind power plant. According to the method, on the basis of flagship wind turbine generators, the health state models of all the wind turbine generators are established in groups, the operation states of the single wind turbine generator and the groups can be monitored at the same time, the operation state of the whole wind power plant is better reflected, and operation, maintenance and management of the wind power plant are better facilitated.
Owner:CHONGQING UNIV
A method for evaluating the operation status of regional expressway network
ActiveCN104050803BIntuitively reflect the running statusReflect running statusDetection of traffic movementTraffic congestionNetwork structure
Owner:BEIHANG UNIV
On-line monitoring system for electrical performance of multi-channel photovoltaic module
PendingCN110971189AReflect running statusReflect performancePhotovoltaic monitoringPhotovoltaic energy generationReliability engineeringExternal communication
The invention provides an on-line monitoring system for the electrical performance of multi-channel photovoltaic modules, and the on-line monitoring system at least comprises three sub-loop systems: apower supply loop system which is provided through an internal DC wide-voltage power supply system and enables the input of a plurality of photovoltaic modules to meet the energy supply of the operation of a monitoring loop system, a monitoring loop system which at least comprises a monitoring element used for acquiring electrical data of a plurality of photovoltaic modules in real time, and an internal control system used for analyzing the acquired electrical data, and ae communication loop system which comprises a monitoring loop system internal communication loop and an external communication loop for monitoring internal and external communication of the loop system. The system monitors the voltage, the current, the power and the temperature of the photovoltaic module in real time, andprovides reliable data support for operation and maintenance of a power station; the overall power consumption is low, power generation of a photovoltaic power station is not affected, and the real-time state of the assembly is truly reflected; and long-time digital on-line monitoring is realized, effectiveness and correctness of all parameters are ensured, and detection errors are small.
Owner:戎得(苏州)光伏科技有限公司
Space-domain sector classification method based on complexity assessment
ActiveCN102855778BReflect running statusObjective reflectionAircraft traffic controlTime domainSliding time window
The invention discloses a space-domain sector classification method based on complexity assessment. The space-domain sector classification method includes creating a time-domain sector point-link type structure model to assess the complexity of sectors by using radar track data and simulation flight data in a sliding time window mode; computing critical complexity, current complexity and stability indexes of the sectors; and dynamically clustering and analyzing according to the relevant indexes to classify the space-domain sectors. The space-domain sector classification method has the advantages that space traffic situation can be objectively, truly and integrally reflected by the characteristics of the complexity of the sectors, the sectors are transversely compared and classified by a k-Means dynamic clustering and analyzing method, and guidance and basis for managing the sectors and making relevant decisions are provided.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Protection method for thrust bearing of axial-flow fixed-blade generator set based on multi-feature fusion
ActiveCN111927677BComprehensive reflection of health statusReflect health statusMachine bearings testingHydro energy generationThrust bearingMulti feature fusion
The invention discloses a method for protecting the thrust bearing of an axial-flow fixed-propeller generating set based on multi-feature fusion, which includes: measuring and calculating the dynamic lifting amount of the hydro-generating set, the turning angle of the thrust head, the inclination of the thrust pad, and the wave of the mirror plate degree and the non-perpendicularity between the main shaft and the mirror plate; if the dynamic lifting amount is greater than the preset dynamic lifting amount threshold, the thrust head flip angle is larger than the preset thrust head flip angle threshold, and the thrust tile inclination is larger than the preset thrust tile If any one of the inclination threshold, the waviness of the mirror plate is greater than the preset waviness threshold of the mirror plate, or the non-perpendicularity between the main axis and the mirror plate is greater than the preset non-perpendicularity threshold between the main axis and the mirror plate, an alarm signal will be output. The invention more comprehensively reflects the operating state and health status of the thrust bearing of the unit, thereby accurately assessing and predicting potential defects and problems existing in the operation of the thrust bearing, and ensuring the stability and safety of the thrust bearing operation.
Owner:STATE GRID CORP OF CHINA +3
Neural network prediction decoupling controller for five-degree-of-freedom bearingless permanent magnet synchronous generator
PendingCN114448310AGood radial displacement controlSample requirements are lowElectronic commutation motor controlVector control systemsDecoupling controllerNetworked system
The invention discloses a five-degree-of-freedom bearingless permanent magnet synchronous generator neural network prediction decoupling controller, which is characterized in that the input end of a fuzzy neural network system is respectively connected with two neural network dynamic prediction modules in series, and the output end of the fuzzy neural network system is connected with a composite controlled object comprising a five-degree-of-freedom bearingless permanent magnet synchronous generator; the first neural network dynamic prediction module outputs a composite control quantity ja at the t + 1 moment, and the second neural network dynamic prediction module outputs a composite control quantity jb and a power generation voltage control quantity at the t + 1 moment; the output of the fuzzy neural network system is a power generation winding reference voltage component, a rotor radial suspension force winding reference voltage component and a rotor axial displacement control voltage at the t + 1 moment; according to the method, the advantages of low sample requirement of fuzzy logic control and good dynamic performance of the neural network on system learning ability and prediction control are combined, various static and dynamic performance such as good rotor radial displacement and power generation voltage control can be obtained, and the control efficiency is improved.
Owner:JIANGSU UNIV
Cable fault detection and early warning system on the basis of optical fiber communication
InactiveCN105676057ASimple structureReasonable designFault locationData transmissionFiber-optic communication
The present invention discloses a cable fault detection and early warning system on the basis of optical fiber communication. The cable fault detection and early warning system on the basis of optical fiber communication comprises a cable fault signal acquisition circuit, an MSP430 single-chip microcomputer module, an ARM microcontroller module, a data storage circuit module and a power supply battery which are connected in order; the cable fault signal acquisition circuit includes an I / V conversion circuit, an amplification circuit, a filtering circuit and an A / D conversion circuit; the input end of the I / V conversion circuit is connected with an A-phase current sensor, a B-phase current sensor and C-phase current sensor; the input end of the ARM microcontroller module is connected with a clock circuit module and a button operation circuit module; the output end of the ARM microcontroller module is connected with a liquid crystal display screen; the ARM microcontroller module is connected with the server to perform both-way communication through a fiber communication system; and the server is connected with an upper computer monitoring computer. The data acquisition efficiency is high, data transmission speed is fast, the implementation cost is low and the work reliability is high.
Owner:XIAN ZHONGZHI HUIZE PHOTOELECTRIC TECH
Remote monitoring method and system for development machine
InactiveCN101995861BSolve problems such as towing damageReflect running statusTunnelsProgramme total factory controlEngineeringWireless repeater
The invention discloses a remote monitoring method and a remote monitoring system for a development machine, which are used for local and remote real-time monitoring of development process, working state and dynamic parameters of the development machine, high-speed wireless data transmission, information acquisition, finishing and storage and have remote monitoring function. The system comprises an onboard controller, a remote controller, a laser orientation instrument, a laser receiver, a digital compass, a wireless network, a wireless repeater, a wired network, a distributed sensor network and a wireless repeater placer. By adopting a wired and wireless data transmission mode, the method and the system well solve the problems of coal bed falling rock, cable dragging damage and the like because a mechanical cable winding system is adopted in the traditional data transmission. The remote monitoring method and the remote monitoring system for the development machine can instantly, intuitively, accurately and comprehensively reflect the running states of the development machine in the onboard controller and the remote controller, perform fault diagnosis and remote control and improve the safe and reliable running capability of the development machine by digital and information means.
Owner:CHINA UNIV OF MINING & TECH
A visual management system for thermal power plants based on virtual reality
ActiveCN104808634BAchieve long-term storagePromote generationTotal factory controlProgramme total factory controlReal-time dataStop time
A thermal power plant visual management system based on virtual reality is provided. The system comprises a system module, an offline database and a special computation module, wherein the system module is connected to a user unit local area network and is used for obtaining acquired boiler heated surface physical parameters and real-time data from the local area network and sending a boiler heated surface overhauling decision to the user unit local area network; the special computation module is used for determining fatigue, creep and over-temprature conditions of a boiled heated surface part according to the boiler heated surface physical parameters and the real-time data, so as to determine a health degree of the heated surface; the offline database is used for recording boiler overhauling historical data; the system module is used for analyzing the obtained boiler heated surface overhauling decision according to a result of the special computation module and records of the offline database. According to the thermal power plant visual management system based on the virtual reality, risk analysis is carried out on a boiler heated surface pipeline and the reasonable heated surface overhauling decision is customized, so that non-planned stopping times of a power generator set are reduced.
Owner:CHINA SHENHUA ENERGY CO LTD +1
Safety Analysis System of Power Equipment Based on Ultraviolet Spectrum Technology
ActiveCN108344931BTruly reflect the running statusReflect running statusTesting using optic methodsCurrent transducerData set
The invention provides a power equipment safety analysis system based on ultraviolet spectrum technology. The system comprises an identification module, an analysis module and a comprehensive determination module which are successively connected, wherein the identification module comprises an image acquisition client, an environmental parameter acquisition end, and a data concentrator connected with the image acquisition client and the environmental parameter acquisition end. The analysis module includes an image intelligent security indication unit and a communication unit connected thereto.The comprehensive determination module includes a security indication unit and a display unit. The data concentrator is connected to the image intelligent security indication unit. The image acquisition client comprises an ultraviolet imaging device, a data acquisition card and a visible light sensor. The environmental parameter acquisition end comprises a temperature and humidity sensor, an eddycurrent sensor, a wind sensor, a voltage sensor and a current sensor. The power equipment safety analysis system, by identifying the ultraviolet spectrum of the power equipment, identifying the equipment identification and considering the influencing factors of the environmental parameters, establishes a comprehensive analysis safety database and realizes the safety analysis of the power equipment.
Owner:ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
Verification System and Verification Method of High Frequency Partial Discharge Detector
ActiveCN105223530BRealize regular inspectionFacilitate regular inspectionElectrical measurementsCurrent sensorFrequency modulation
The invention discloses a high-frequency partial discharge detector calibration system and a calibration method thereof. The system comprises a frequency modulation and amplitude modulation signal generator, a power-frequency current generator, a standard partial discharge signal generator, a signal conditioning module, a coaxial cable, a matching impedor, an oscilloscope, and a central control unit. The calibration method comprises the steps like calibrating the saturation characteristic of a high-frequency partial discharge detector. The amplitude and frequency of the frequency modulation and amplitude modulation signal generator are easy to adjust. The performance calibration requirement of high-frequency partial discharge detectors and high-frequency current sensors thereof can be satisfied. The problem on performance calibration of high-frequency partial discharge detectors and high-frequency current sensors thereof can be solved effectively and in a unified way. Regular inspection of high-frequency partial discharge detectors can be implemented easily. Good performance of high-frequency partial discharge detectors is ensured. The running status of electrical equipment can be reflected effectively. The system and the method of the invention have the advantages of accurate and reliable test results and easy implementation.
Owner:STATE GRID CORP OF CHINA +2
Voltage Stability Evaluation Method Based on Thevenin Equivalence and Branch Transmission Power Limit
ActiveCN106682407BThe theoretical basis is correctReduce mistakesInformaticsComplex mathematical operationsNODALElectric power system
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
A Data Preprocessing Method for Steam-water Leakage Diagnosis of Waste Heat Boiler
InactiveCN106838872BReflect running statusImprove accuracyBoiler indication operationsWater leakagePretreatment method
The invention discloses a data pretreatment method for a steam water leakage diagnosis of a heat recovery boiler. The data pretreatment method comprises the following steps that: (1) the operation data are collected and recorded; (2) the abnormal data among the operating data are removed; (3) the operating data in steady operating condition are screened; (4) steady-state segments are conducted with the mean value polymerization on the basis of the abnormal data removal and the steady-state screening. The data pretreatment method for the steam water leakage diagnosis of the heat recovery boiler is put forward according to the characteristics of the operation data of the gas-steam combined cycle unit heat recovery boiler. The data pretreatment method has the advantages of high reliability, improved operating data quality and improved fault diagnosis accuracy rate.
Owner:HUAZHONG UNIV OF SCI & TECH +1
Five degrees of freedom bearingless permanent magnet synchronous motor fuzzy neural network decoupling controller
ActiveCN107276473BGood radial positionGood speed controlElectronic commutation motor controlVector control systemsMotor speedAxial displacement
The present invention discloses a five-degree-of-freedom bearingless permanent magnet synchronous motor fuzzy neural network decoupling controller. The controller is formed by connection in series of output ends of two dynamic prediction modules with the input end of a fuzzy neural network system, the input of a first dynamic prediction module is a radial displacement {xa, ya}, an axial displacement za and a radial displacement set value (img file='DDA0001335767690000011. TIF' wi='154' he='65' / ) and an axial displacement set value (img file='DDA0001335767690000012. TIF' wi='79' he='64' / ), and the output of the first dynamic prediction module is composite control signals ja; and the input of the second dynamic prediction module is a radial displacement {xb, yb}, a rotation speed [Omega], a radial displacement set value (img file='DDA0001335767690000013. TIF' wi='150' he='65' / ) and a rotation speed set value [Omega]*, and the output of the second dynamic prediction module is composite control signals jb and rotation speed control signals [Omega]c. The five-degree-of-freedom bearingless permanent magnet synchronous motor fuzzy neural network decoupling controller combines the fuzzy logic control to have low sample requirement, and the neural network has good dynamic performances for the system learning capacity and prediction control, and various good static dynamic performances such as rotor radial position and motor speed control can be obtained, etc.
Owner:东台城东科技创业园管理有限公司
Data pretreatment method for steam water leakage diagnosis of heat recovery boiler
InactiveCN106838872AReflect running statusImprove accuracyBoiler indication operationsWater leakagePretreatment method
The invention discloses a data pretreatment method for a steam water leakage diagnosis of a heat recovery boiler. The data pretreatment method comprises the following steps that: (1) the operation data are collected and recorded; (2) the abnormal data among the operating data are removed; (3) the operating data in steady operating condition are screened; (4) steady-state segments are conducted with the mean value polymerization on the basis of the abnormal data removal and the steady-state screening. The data pretreatment method for the steam water leakage diagnosis of the heat recovery boiler is put forward according to the characteristics of the operation data of the gas-steam combined cycle unit heat recovery boiler. The data pretreatment method has the advantages of high reliability, improved operating data quality and improved fault diagnosis accuracy rate.
Owner:HUAZHONG UNIV OF SCI & TECH +1
Multi-feature fusion based axial flow fixed-blade type generator set thrust bearing protection method
ActiveCN111927677AComprehensive reflection of health statusReflect health statusMachine bearings testingHydro energy generationAxial displacementMulti feature fusion
The invention discloses a multi-feature fusion based axial flow fixed-blade type generator set thrust bearing protection method. The multi-feature fusion based axial flow fixed-blade type generator set thrust bearing protection method includes the steps that dynamic axial displacement amount, thrust block overturning angle, thrust pad inclination and thrust runner wave degree of a water-turbine generator set and non-perpendicular degree of a main shaft and a thrust runner are measured and calculated; and if anyone of the conditions that the dynamic axial displacement amount is greater than a preset dynamic axial displacement amount threshold value, the thrust block overturning angle is greater than a preset thrust block overturning angle threshold value, the thrust pad inclination is greater than a preset thrust pad inclination threshold value, the thrust runner wave degree is greater than the preset thrust runner wave degree threshold value, and the non-perpendicularity degree of themain shaft and the thrust runner is greater than a preset non-perpendicularity threshold value of the main shaft and the thrust runner occurs, an alarm signal is output. The operating state and healthstatus of a thrust bearing of a unit are more comprehensively reflected, so that potential defects and problems existing in the thrust bearing operation can be accurately evaluated and predicted, andthe stability and safety of the thrust bearing operation can be ensured.
Owner:STATE GRID CORP OF CHINA +3
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