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38 results about "Power reliability" patented technology
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Reliability Ratings. J.D. Power Reliability ratings are a combination of J.D. Power Quality and Dependability scores. Quality scores are based on initial owner response and feedback of their new purchase whereas Dependability scores focus on longer-term ownership experiences of 3 years.
Microgrid running optimization system and method based on power and heat combined dispatching
ActiveCN104734168AIncrease profitLow running costEnergy storageAc network load balancingDistributed generatorInteger non linear programming
The invention discloses a microgrid running optimization system and method based on power and heat combined dispatching. Running restrains such as the output force characteristic, start, stop and climbing of a distributed type generator set and the charge and discharge characteristics of power and heat energy storage are comprehensively considered, a microgrid power and heat combined dispatching model containing a fan, a photovoltaic cell, a combined heat and power generation system, an electric boiler, a fuel cell and an energy storage (electrical energy storage and heat energy storage) is built, the 0-1 mixed integer nonlinear programming method is adopted for solving the optimal output force and total running cost of all units in the network, and power and heat dispatching contrastive analysis is carried out on the system and a traditional separated generation and combined generation optimization model. In addition, the influences of the heat and power reliability difference on the running are analyzed and discussed, and therefore the heat and power dispatching module is more reasonable, comprehensive and universal.
Owner:SHANDONG UNIV
Resident intelligent energy management system suitable for intelligent power grid
InactiveCN102570609ARealize peak shaving and valley fillingImprove quality reliabilityCircuit arrangementsSustainable buildingsPower qualityEngineering
The invention discloses a resident intelligent energy management system suitable for an intelligent power grid. Due to the adoption of the resident intelligent energy management system, peak and off peak load regulation of a power load is realized, and the power quality and power reliability are improved. An intelligent energy management controller and an intelligent electric meter are arranged in the home of each resident; a control terminal is arranged on each controllable domestic appliance and a user switch respectively; a distributed power supply accessing device is arranged on each distributed power supply; the controller is connected with the control terminal and the distributed power accessing device through a Zigbee wireless communication network; the intelligent electric meter is connected with the distributed power supply accessing device and the controllable domestic appliance; the controller is communicated with the intelligent electric meter through a bus; the intelligent electric meter is further connected with the secondary sides of a voltage mutual inductor and a current mutual inductor; the controller undergoes information interaction with a high-level measuring system AMI (Advanced Metering Infrastructure) of a main station through Ethernet communication; the controller is used for controlling switching of the control terminal and the distributed power supply accessing device; the control terminal is used for submitting the state of the switch to the controller; the controller is used for monitoring the state of the switch.
Owner:SHANDONG INST OF BUSINESS & TECH +1
Loudspeaker diaphragm
The invention discloses a loudspeaker diaphragm which comprises a ball top part (20) in the center and a folding part (10) at the rim. The folding part (10) is a single layer structure made from a TPEE (thermoplastic polyester elastomer) material layer (2) or is a composite structure provided with at least one TPEE material layer (2). Compared with diaphragms made from TPU materials, the diaphragm of the invention has good toughness and strength, can effectively reduce the vibration frequency, and expand the bandwidth of a product. Further, the diaphragm is also stable in structure and reliable in withstanding power and provides good stability of vibration frequency.
Owner:GOERTEK INC
Wind-farm reliability evaluation method of considering wind-turbine transmission system fatigue
The invention relates to a wind-farm reliability evaluation method, and particularly to a wind-farm reliability evaluation method of considering wind-turbine transmission system fatigue. The method solves the problem that risks cannot be accurately evaluated by existing evaluation methods, and includes the steps of: 1, generating a historical fatigue load time sequence and a fatigue load spectrumof turbines; 2, generating a shafting material performance S-N curve; 3, carrying out fatigue analysis on turbine shafting; 4, establishing a shafting fatigue failure rate model; 5, establishing a Markov model of considering the transmission system fatigue; and 6, using a Monte Carlo method for reliability analysis. The method of the invention has the advantage that possibility that fatigue damageof traditional turbine shafting causes a turbines outage and occurrence probability and caused consequences thereof are considered when it is determined that the turbines are in running or outage status, thus a more accurate turbine outage probability model according with reality is provided in turbine reliability modeling, then accuracy of wind-power reliability evaluation is significantly improved, and an analysis result can be indirectly used for guiding of wind-farm overhaul plans and running plans.
Owner:TAIYUAN UNIV OF TECH
LED integrated driving power reliability analysis method based on accelerated performance degradation parameter
InactiveCN107238765AImprove reliabilitySimple methodDesign optimisation/simulationPower supply testingElectricityPower reliability
The invention relates to a reliability analysis method in the field of accelerated degradation testing, and in particular to a method based on accelerated degradation electrical parameter for analyzing the reliability of a LED integrated driving power within a LED entire light life cycle based on luminous flux. The method aims at using an electrical parameter to analyze the reliability of the LED integrated driving power so as to obtain the result of influence on the lifecycle of the entire lamp by the driving power. The reliability research for the driving power is based on design perspective. According to the invention, the method aims at addressing the problem of reliability analysis of the integrated driving power within the entire life cycle of the LED lamp, establishes a Wiener-based statistic model in accordance with the accelerated degradation electrical parameter, and conducts model parameter identification in combination with the maximum likelihood method and the MCMC method. The improved identification method reduces sampling requirements with the proviso of better protecting the identification precision by improving the identification method. And eventually, the method can provide a reliability index of the LED integrated driving power within the life cycle of the entire lamp in accordance with the constraints of the life cycle of the entire LED lamp based on luminous flux.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Reliability power outage event collection integrity analysis and automatic completion method
ActiveCN108647328AImprove integrityImprove accuracyData processing applicationsSpecial data processing applicationsPower reliabilityComputer science
The present invention discloses a reliability power outage event collection integrity analysis and automatic completion method, and belongs to the technical field of power reliability management. Themethod comprises: constructing a unified analysis model for power outage events of distribution networks; collecting the automatically collected discrete user power outage information to generate original power outage events; performing collection integrity analysis on the original power outage events, and searching and positioning incompletely collected power outage line segments and omissively collected users; determining and identifying whether the omissively collected users belongs to the users in real power outage; and automatically completing power outage information for the omissive users in real power outage, and uploading a final power outage event to a reliability service system. The method disclosed by the present invention has strong real-time performance, high accuracy, and asmall amount in calculating and processing data, can improve the integrity and accuracy of automatic integration of power outage data, and can provide strong support for reliability index analysis application and daily service management.
Owner:HUAINAN POWER SUPPLY CO OF STATE GRID ANHUI ELECTRIC POWER CORPORATIO +2
Waveguide switch with heat dissipating device
ActiveCN103247838AReduce the temperatureImprove cooling effectWaveguide type devicesMetallic materialsRadio frequency signal
The invention discloses a waveguide switch with a heat dissipating device, and aims to effectively solve the problem of heat dissipation when the waveguide switch transmits high-power radio frequency signals. The heat dissipating device comprises an inner ring, an outer ring and a heat dissipating wire. The heat dissipating device is mounted at the bottom of the waveguide switch, can quickly transmit heat generated by high-power radio frequency signals to an outer casing of a guided stator of the waveguide switch, effectively reduce the temperature difference between a guided rotor and the guided stator, and avoid rotational failures of the waveguide switch, due to expansion of parts caused by over temperature. The waveguide switch provided by the invention has the advantages of simple structure and light weight, unnecessary nonmetallic materials are not used, the heat dissipation potential of the waveguide switch under high-power working conditions is effectively improved, and the overall high-power reliability of the waveguide switch is improved.
Owner:CHINA AEROSPACE TIMES ELECTRONICS CORP
First passage theory-based method for analyzing non-probability power reliability of vibrating active control system
ActiveCN106021909AGuaranteed validityMake up for and perfect limitationsSpecial data processing applicationsInformaticsDispersityState space equation
The invention discloses a first passage theory-based method for analyzing non-probability power reliability of a vibrating active control system. According to the method, the influences, caused by interval uncertainty of materials, on well-posedness of the active control system is comprehensively considered. The method comprises the following steps: deriving a power response expression of the active control system on the basis of a one-order state-space equation and a state feedback control theory; constructing a non-probability interval process model of controlled structure power response on the basis of an interval mathematic thought and a time varying uncertainty propagation analysis method; and defining a non-probability power reliability index of the vibrating active control system by utilizing a first passage theory and a structure control rate failure criterion, and exploring an efficient and steady solving method. When the method is used for carrying out reliability calculation, the comprehensive influences, caused by material dispersity, on controlled structure power response is embodied, so that necessary and feasible theoretical reference is provided for the fine design of controllers.
Owner:BEIHANG UNIV
Novel parking AGV trolley
PendingCN110329392AImprove driving abilityImprove accuracyVehicle fittings for liftingUnderstructuresVibration attenuationVehicle frame
The invention discloses a novel parking AGV trolley. The novel parking AGV trolley consists of a bumper, a frame and two sets of symmetrical structures installed on the frame, wherein each set of structures comprises a driving system, a steering system, a vibration attenuation guiding mechanism and a clamping mechanism. The driving system is driven by four electric wheels, all-wheel omni-directional walking can be realized, the effect of bearing a balance car body is reached, and the driving system has relatively high dynamic property; the steering system realizes flexible steering through a swivel bearing and a stepping motor; the vibration attenuation guiding mechanism mainly consists of a spring and a guide rod, and the stability in the transportation process of the trolley is improved;the clamping mechanism comprises a clamping assembly and a clamping adjusting device, the clamping assembly realizes lifting of vehicles, the clamping adjusting mechanism realizes adjustment for thecenter distance of a front clamping device and a rear clamping device, and transportation for vehicles with different distances between shafts can be realized. Compared with the prior art, the novel parking AGV trolley has the advantages of power reliability, steering flexibility, stability in the transportation process and high applicability.
Owner:TAIYUAN UNIV OF TECH
Power maintenance operating platform
ActiveCN104727539AImprove reliabilityTimely power repair workBuilding support scaffoldsPower reliabilityElectric power
The invention provides a power maintenance operating platform. The power maintenance operating platform comprises a first hoop piece, a second hoop piece, a loading platform and a climbing device, wherein the first hoop piece and the second hoop piece are alternately arranged on a wire pole up and down, the first end of the loading platform is arranged on the first hoop piece, the first end of the climbing device is connected to the second hoop piece, and the second end of the climbing device is connected to the second end of the loading platform far away from the wire bar. The power maintenance operating platform can be used for stably supporting a repairer standing on the loading platform, however the wire pole is slippery in rainy days, therefore the repairer can climb the wire bar successfully to carry out power maintenance operation timely in rainy days, the power supply of the power faulty line can be restored timely, and the powering reliability of a circuit can be improved.
Owner:STATE GRID CORP OF CHINA +1
Arc fault protection device
InactiveCN104332948AReliable actionAccurateEmergency protective arrangements for automatic disconnectionLoad circuitElectrical devices
The invention relates to the technical field of electrical equipment and household appliance protection and discloses an arc fault protection device. The device comprises a central processing unit, an output drive circuit and an alarm light. The input end of the central processing unit is connected with output ends of a voltage filtering processor, a first current filtering processor and a second current filtering processor respectively. According to the device, the voltage in a load circuit is acquired through a voltage transformer, the serial current in the load circuit is acquired through a first current transformer, the parallel current in the load circuit is acquired through a second current transformer, and accordingly, the problems of the damage of loads due to the failure of protection caused by distance running of a breaker or the reduction of power reliability caused by the maloperation of conventional arc fault protection breakers are solved by combining with the voltage waveform of arc faults and integrating fault protection with leakage protection on the basis of the arc fault current waveform. The device has the advantages of being complete in protection items and accurate and reliable in breaker action.
Owner:GANSU ELECTRIC APP RES INST
Conveying equipment capable of achieving goods delivery with freely-bent track
PendingCN108177931AEasy loadingImprove reliabilityConveyorsSupporting framesDrive wheelUniversal joint
The invention discloses conveying equipment capable of achieving goods delivery with a freely-bent track. The conveying equipment comprises a plurality of conveying sections. The conveying sections comprise turnable chain plate conveying mechanisms and underframe mechanisms. Bottom wheels are installed on the bottom faces of the underframe mechanisms. The turnable chain plate conveying mechanismscomprise chain plates, motors and driving wheels. The chain plates are sequentially connected in series end to end. The motors are connected with the corresponding driving wheels. The chain plates aremovably connected through T-shaped connectors. The underframe mechanisms comprise underframes and universal joint mechanisms. The underframes are movably connected through the universal joint mechanisms. The motors are installed on the corresponding underframes, and the driving wheels make contact with the T-shaped connectors to form driving structures of the corresponding chain plates. Accordingto the conveying equipment, the chain plates and the underframes are designed to be a circulation conveying structure capable of being bent left and right and further being bent up and down, the whole conveying mechanism is composed of the multiple conveying sections, the multiple motors can be installed at the head end and the tail end of each conveying section, and thus power reliability is improved; and meanwhile the defects that a conveying device is small in bending amplitude and prone to breaking down in the prior art are overcome.
Owner:WEIHAI GUANGTAI AIRPORT EQUIP CO LTD
Circuit reducing electromagnetic interference and increasing peak power through adjusting pulse
ActiveCN105939104AReduce electromagnetic interferenceHigh peak powerEfficient power electronics conversionEmergency protective circuit arrangementsStart timePeak value
Owner:企达智能科技(南京)有限公司
Main wiring system of medium-voltage power distribution cabinet
InactiveCN105896536ASimple structureEasy to useAc network circuit arrangementsPower qualityPower reliability
The invention provides a main wiring system of a medium-voltage power distribution cabinet. The main wiring system comprises a metering cabinet, a PT cabinet, an incoming cabinet and a feeder cabinet, wherein the metering cabinet comprises a first current transformer, a first fuse, a metering voltage transformer, a first charged display and a first arrester; an incoming line terminal of the metering voltage transformer sequentially passes through the first fuse and the first current transformer and is connected with a medium-voltage bus; an outgoing line terminal of the first current transformer sequentially passes through the first charged display and the first arrester and is grounded; the PT cabinet comprises a three-winding voltage transformer and a second fuse; the incoming line terminal of the three-winding voltage transformer passes through the second fuse and is connected with the medium-voltage bus; the incoming line terminal of the second fuse passes through a second arrester and is grounded. The main wiring system of the medium-voltage power distribution cabinet is simple in structure and convenient to use; the fault rate of the system is reduced; the electric energy quality is improved; the power reliability is ensured; the electric cost expenditure is reduced; and the reliability of a power distribution network is improved.
Owner:SUZHOU POWER SUPPLY COMPANY OF STATE GRID ANHUI PROVINCE ELECTRIC POWER +1
Ultra-high-voltage direct-current fault scheduling method based on aggregated constant-temperature control load
ActiveCN109361231AImprove operational reliabilityIncrease total dispatch capacityElectric power transfer ac networkResourcesUltra high voltageLoad following power plant
The invention discloses an ultra-high-voltage direct-current fault scheduling method based on an aggregated constant-temperature control load, and belongs to the field of electric power system emergency circumstance scheduling. The method includes the steps: building an ultra-high-voltage transmission power reliability model based on ultra-high-voltage element fault probability; performing constant-temperature control load individual scheduling capacity modeling based on electric thermal characteristics; performing aggregation modeling on different constant-temperature control loads in the same area based on constant-temperature control load individual scheduling capacity modeling to determine total constant-temperature control load scheduling capacity; combining an aggregated constant-temperature control load scheduling model and a conventional unit scheduling model based on an optimal power flow module, acquiring an optimal scheduling scheme under the ultra-high-voltage direct-current fault scheduling condition, and assessing the scheduling participation degree of the constant-temperature control load. According to the method, the scheduling participation degree of the constant-temperature control load is assessed, total scheduling capability of a system is improved, the running reliability of a receiving end network of an ultra-high-voltage direct-current system is effectively improved, and the total scheduling cost of the system can be reduced.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER +2
Wind farm active power distribution method based on second-price sealed auction
InactiveCN107623332AGuaranteed reliabilityPromote technological competitionSingle network parallel feeding arrangementsWind energy generationPower controllerElectricity
The invention discloses a wind farm active power distribution method based on second-price sealed auction. The method is completed under cooperation between a wind farm active power controller and each wind turbine; the wind farm active power controller initiates power generation right auction to each wind turbine successively, and an auction end time is judged; according to the actual condition of the turbine, each wind turbine controller decides auction bid at each time; according to the bid of each turbine, the wind farm active power controller selects a turbine which wins the bid at each time according to a second-price sealed auction principle, and the corresponding power generation right is distributed to the turbine which wins the bid; and after the auction is ended, the power generation right acquired accumulatively by each turbine is the reference power for operation of the wind turbine. The method of the invention can promote the turbine to compete for the power generation right according to the real conditions of the self wind speed, the health condition and the output features, the wind farm active power reliability is ensured, the technical competition between the turbines is promoted, and the complexity of the wind farm active power control system is reduced.
Owner:XIANGTAN UNIV
A microgrid operation optimization system and method based on combined electric and thermal dispatching
ActiveCN104734168BIncrease profitLow running costEnergy storageAc network load balancingDistributed generatorInteger non linear programming
The invention discloses a microgrid running optimization system and method based on power and heat combined dispatching. Running restrains such as the output force characteristic, start, stop and climbing of a distributed type generator set and the charge and discharge characteristics of power and heat energy storage are comprehensively considered, a microgrid power and heat combined dispatching model containing a fan, a photovoltaic cell, a combined heat and power generation system, an electric boiler, a fuel cell and an energy storage (electrical energy storage and heat energy storage) is built, the 0-1 mixed integer nonlinear programming method is adopted for solving the optimal output force and total running cost of all units in the network, and power and heat dispatching contrastive analysis is carried out on the system and a traditional separated generation and combined generation optimization model. In addition, the influences of the heat and power reliability difference on the running are analyzed and discussed, and therefore the heat and power dispatching module is more reasonable, comprehensive and universal.
Owner:SHANDONG UNIV
Distributed battery management system
ActiveCN107732985BReduce complexityAvoid risk of damageCharge equalisation circuitElectrical testingLow voltageElectrical battery
Owner:JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
Resident intelligent energy management system suitable for intelligent power grid
InactiveCN102570609BRealize peak shaving and valley fillingImprove quality reliabilityCircuit arrangementsSustainable buildingsPower qualityEngineering
The invention discloses a resident intelligent energy management system suitable for an intelligent power grid. Due to the adoption of the resident intelligent energy management system, peak and off peak load regulation of a power load is realized, and the power quality and power reliability are improved. An intelligent energy management controller and an intelligent electric meter are arranged in the home of each resident; a control terminal is arranged on each controllable domestic appliance and a user switch respectively; a distributed power supply accessing device is arranged on each distributed power supply; the controller is connected with the control terminal and the distributed power accessing device through a Zigbee wireless communication network; the intelligent electric meter is connected with the distributed power supply accessing device and the controllable domestic appliance; the controller is communicated with the intelligent electric meter through a bus; the intelligent electric meter is further connected with the secondary sides of a voltage mutual inductor and a current mutual inductor; the controller undergoes information interaction with a high-level measuring system AMI (Advanced Metering Infrastructure) of a main station through Ethernet communication; the controller is used for controlling switching of the control terminal and the distributed power supply accessing device; the control terminal is used for submitting the state of the switch to the controller; the controller is used for monitoring the state of the switch.
Owner:SHANDONG INST OF BUSINESS & TECH +1
Waveguide switch with heat dissipating device
ActiveCN103247838BReduce the temperatureImprove cooling effectWaveguide type devicesRadio frequency signalPower reliability
The invention discloses a waveguide switch with a heat dissipating device, and aims to effectively solve the problem of heat dissipation when the waveguide switch transmits high-power radio frequency signals. The heat dissipating device comprises an inner ring, an outer ring and a heat dissipating wire. The heat dissipating device is mounted at the bottom of the waveguide switch, can quickly transmit heat generated by high-power radio frequency signals to an outer casing of a guided stator of the waveguide switch, effectively reduce the temperature difference between a guided rotor and the guided stator, and avoid rotational failures of the waveguide switch, due to expansion of parts caused by over temperature. The waveguide switch provided by the invention has the advantages of simple structure and light weight, unnecessary nonmetallic materials are not used, the heat dissipation potential of the waveguide switch under high-power working conditions is effectively improved, and the overall high-power reliability of the waveguide switch is improved.
Owner:CHINA AEROSPACE TIMES ELECTRONICS CORP
a speaker
The invention discloses a loudspeaker diaphragm which comprises a ball top part (20) in the center and a folding part (10) at the rim. The folding part (10) is a single layer structure made from a TPEE (thermoplastic polyester elastomer) material layer (2) or is a composite structure provided with at least one TPEE material layer (2). Compared with diaphragms made from TPU materials, the diaphragm of the invention has good toughness and strength, can effectively reduce the vibration frequency, and expand the bandwidth of a product. Further, the diaphragm is also stable in structure and reliable in withstanding power and provides good stability of vibration frequency.
Owner:GOERTEK INC
Method for monitoring and counting power supply reliability of terminal of power grid
InactiveCN105203874APower supply reliability monitoring and statisticsImprove the quality of power supplyElectrical testingHuman–machine interfaceLow voltage
The invention provides a method for monitoring and counting power supply reliability of the terminal of a power grid. The method is carried out through an electric energy meter arranged at the terminal of the low-voltage power grid. The electric energy meter comprises an electric energy metering unit, a main control unit, a human-machine interface unit, a storage unit, a real-time clock unit, a communication interface unit and a power module. The method includes the steps of 1, initialization of the electric energy meter; 2, power-on time recording; 3, power-down time recording; 4, power failure time counting; 5, power supply reliability counting. The method is simple, practical and reliable, the power supply reliability of the terminal of the low-voltage power grid can be effectively monitored and counted, the gap for monitoring and counting the power supply reliability of the terminal of the power grid in the prior art is filled in, and an effective information support is provided for a power supply department to improve the power supply quality of the terminal of the power grid.
Owner:CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +2
Power maintenance operation platform
ActiveCN104727539BImprove reliabilityTimely power repair workBuilding support scaffoldsPower reliabilityEngineering
The invention provides a power maintenance operating platform. The power maintenance operating platform comprises a first hoop piece, a second hoop piece, a loading platform and a climbing device, wherein the first hoop piece and the second hoop piece are alternately arranged on a wire pole up and down, the first end of the loading platform is arranged on the first hoop piece, the first end of the climbing device is connected to the second hoop piece, and the second end of the climbing device is connected to the second end of the loading platform far away from the wire bar. The power maintenance operating platform can be used for stably supporting a repairer standing on the loading platform, however the wire pole is slippery in rainy days, therefore the repairer can climb the wire bar successfully to carry out power maintenance operation timely in rainy days, the power supply of the power faulty line can be restored timely, and the powering reliability of a circuit can be improved.
Owner:STATE GRID CORP OF CHINA +1
Troubleshooting method, device and flexible direct current transmission system
ActiveCN111817267BImprove stabilityImprove power supply reliabilityEmergency protective circuit arrangementsElectric power transfer ac networkTransformerCurrent threshold
The invention provides a fault processing method, device and flexible direct current transmission system. The method includes: responding to the fault signal of the flexible direct current transmission system, blocking the fault processing sub-module; obtaining the current of the transmission line; based on the current falling to the first current threshold, controlling the fault processing sub-module to switch to uncontrolled rectification after the deionization time The operation mode; determine the fault state of the flexible direct current transmission system according to the current; control the fault processing sub-module according to the fault state. Therefore, it is possible to identify the fault state after the end of the deionization stage, unlock only after it is judged as a transient fault, and re-block the faulty pole converter after it is judged as a permanent fault, isolate the faulty line, and realize the automatic failure of the flexible DC transmission system. Adaptive recovery avoids unnecessary shocks and delays in stability control actions caused by repeated recovery operations under permanent faults, which is conducive to improving system stability and power supply reliability.
Owner:TSINGHUA UNIV
A power monitoring system based on big data fusion model
ActiveCN113050523BRealize unattendedImprove modern management levelProgramme controlComputer controlSystems managementEngineering
The invention relates to a power monitoring system based on a big data fusion model. The system is divided into three layers: a field device layer, a communication management layer and a system management layer; the system adopts the CoxPH algorithm based on deep learning to analyze the received data. Extracting eigenvalues can complete various practical functions such as switch status monitoring, analog quantity acquisition, comprehensive protection monitoring, remote control, alarm management, curve bar graph analysis, report generation, statistical printing, user management, accident recall, etc. Power reliability, improved power management efficiency, improved power supply quality, and reduced operation and maintenance costs.
Owner:衍博集团有限公司
Fast Calculation Method of Power Reliability Index Based on Multi-thread Processing of Cache Data
ActiveCN103488684BImprove retrieval efficiencyGuaranteed computing speedEnergy efficient computingSpecial data processing applicationsManagement unitData retrieval
A rapid calculation method for an electric power reliability index based on the multithread processing of cache data, which solves the problem of low analysis and calculation efficiency of an electric power reliability index. The method comprises: creating a data cache area in a memory, dividing same according to service data types, and using a management unit, a device registration date or power-cut generation date as primary keys, so as to establish data blocks; establishing a change buffer area in each data block, recording a data change, and merging the change buffer area data with basic data at a definite time; and averagely allocating to a plurality of threads the data which is related to index calculation, so as to conduct basic index calculation, and then, merging the basic index calculation result of each thread, so as to calculate the comprehensive reliability index of each level of management unit. By means of the technical means of multi-data block caching service data, a data change buffer area and multithread processing, the basic data retrieval and calculation efficiency of an electric power reliability service are improved, thereby achieving the rapid calculation of an electric power reliability index.
Owner:STATE GRID CORP OF CHINA +2
A Terminal Model Supporting Power Supply Reliability Management for End Users
ActiveCN103699688BSupport data requirementsData processing applicationsEnergy efficient computingElectric power systemFiltration
The invention provides a terminal model for supporting management of reliability in power supply of a terminal user. The terminal model comprises a basic user data maintenance module, an operation event data maintenance module, an index statistical analysis module, an index visualization module and a data communication module, wherein the basic user data maintenance module is used for automatically collecting basic user data of a power system and saving the basic user data to a database; the operation event data maintenance module is used for automatically collecting operation event data of the power system and saving the operation event data to the database; the index statistical analysis module is used for performing statistical analysis on the basic user data collected by the basic user data maintenance module and the operation event data collected by the operation event data maintenance module to form various statistical indexes; the index visualization module is used for performing visualization display on the statistical indexes formed by the index statistical analysis module; the data communication module is used for synchronizing the statistical indexes formed by the index statistical analysis module to a reliability management system. The terminal module can obtain the basic user data and the operation event data which are in line with the requirements by automatic collection, filtration, conversion and curing.
Owner:SHENZHEN POWER SUPPLY BUREAU
A Reliability Assessment Method for Urban Power Grids Considering Generation, Transmission and Distribution Systems
InactiveCN105809322BAvoiding the pitfalls of reliability assessmentTruly reflect the actual situationResourcesDistribution power systemEngineering
Owner:STATE GRID JIBEI ELECTRIC POWER COMPANY +1
UHVDC Fault Dispatch Method Based on Aggregate Constant Temperature Control Load
ActiveCN109361231BImprove operational reliabilityIncrease total dispatch capacityElectric power transfer ac networkResourcesHigh-voltage direct currentEngineering
The invention discloses an UHV DC fault scheduling method based on aggregated constant temperature control load, and belongs to the field of power system emergency scheduling. The invention comprises the steps of: establishing a reliability model of UHV transmission power based on the failure probability of UHV components; modeling the individual dispatching capacity of constant temperature control loads based on the electrothermal characteristics; The constant temperature control load is aggregated and modeled to determine the overall dispatch capacity of the constant temperature control load; based on the optimal power flow model, the aggregate constant temperature control load dispatch model is combined with the traditional unit dispatch to obtain the optimal dispatch plan in the event of a UHV DC system failure And evaluate the degree to which the constant temperature control load participates in dispatching. This technical solution evaluates the degree to which the constant temperature control load participates in dispatching, improves the total dispatching capacity of the system, effectively improves the operation reliability of the receiving end network of the UHV DC system, and can reduce the total dispatching cost of the system.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER +2
Distributed power supply grid connection access system
InactiveCN104362676AImprove reliabilityGuaranteed reliabilitySingle network parallel feeding arrangementsFailure ratePower quality
The invention discloses a distributed power supply grid connection access system. The distributed power supply grid connection access system comprises a grid connection inverter, a distributed power supply access control unit, a mains supply transformer low-voltage wire outlet control unit, a low-voltage reactive power compensation control circuit and a multi-way low-voltage wire outlet circuit. The distributed power supply access control unit is connected with the grid connection inverter, the mains supply transformer low-voltage wire outlet control unit is connected between the distributed power supply access control unit and a mains supply transformer, and the low-voltage reactive power compensation control circuit and the multi-way low-voltage wire outlet circuit are connected with a low-voltage busbar. By means of conversion of new energy resources, failure rate of the system is decreased, and power quality is improved; the system can serve as a standby power supply to provide electric energy for users requiring uninterrupted power supply, power reliability is guaranteed while electric charge is reduced, and reliability of a power distribution network is improved. In addition, distributed generation is flexible in load regulation capability, only a few seconds are required for starting, and output is adjustable by the hour.
Owner:STATE GRID CORP OF CHINA +1
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