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97results about How to "Improve security and stability" patented technology
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Low voltage microgrid group independent coordination control system
ActiveCN104836334AIncrease profitImprove receptivitySingle network parallel feeding arrangementsWind energy generationMicrogridControl layer
Provided is a low voltage microgrid group independent coordination control system, employing a layered control structure, i.e., an equipment layer, a grid control layer and a group control layer. A microgrid group controller receives a scheduling instruction of a group level energy management system; based on the safety and reliability of a control target of the microgrid group and sub microgrids, the microgrid group controller controls exchanging power between a microgrid group and a power distribution network and each sub microgrid, grid disconnection or grid connection of the microgrid group, and grid connection or grid disconnection of the sub microgrids, realizes interface control between the sub microgrids and the microgrid group, and meanwhile issues a control instruction to a grid level controller. The grid level controller works out optimal control strategies of distributed power supply, energy storage and load, and realizes stable operation and smooth transition among states of the sub microgrids in a grid connection state, and information communication with the microgrid group controller. A supply or energy storage local controller completes primary regulation of frequency and voltage of distributed power supply and energy storage; a load controller completes load grading control.
Owner:CHINA AGRI UNIV
Cosmetic composition
InactiveUS6942878B2Improves UV protectionImprove security and stabilityCosmetic preparationsBiocideMass ratioAdditive ingredient
Owner:RESONAC HOLDINGS CORPORATION
Energy storage power station battery compartment battery fault pre-judging and positioning method
PendingCN112731159AImprove the technical support level of operation and maintenanceAchieving Health Status AssessmentElectrical testingElectrical batteryFaulty cell
The invention discloses an energy storage power station battery compartment battery fault pre-judgment and positioning method, which comprises the steps of conducting single battery health degree analysis, battery performance change trend prediction and battery fault accurate pre-judgment and positioning, and obtaining battery operation parameter upper and lower limit thresholds and a battery health state in a current state by analyzing the single battery health degree; and predicting a battery performance change trend in a future period of time based on historical data in the past period of time, and pre-judging and positioning possible faults in the future in combination with upper and lower limit thresholds. Meanwhile, if it is detected that a certain or some properties of a single battery, a battery pack or a battery cluster may change suddenly in an extremely short time, possible faults in a short time can be predicted through a battery fault accurate pre-judgment and positioning function, and corresponding faults are positioned and identified through a fault expert database. Through comprehensive implementation of the method, the operation and maintenance technical support level and the system safety and stability level of the energy storage power station can be obviously improved.
Owner:JIANGSU ELECTRIC POWER RES INST +4
Method for rapidly accessing to wireless local area network and mobile terminal thereof
InactiveCN102395216AImprove securityEasy access rights managementConnection managementSecurity arrangementPasswordBarcode
The invention relates to the wireless network field and discloses a method for rapidly accessing to a wireless local area network and a mobile terminal thereof. By using the method for rapidly accessing to the wireless local area network, the mobile terminal can conveniently access to the wireless local area network. Simultaneously, network privacy information can be protected and network safety stabilization can be strengthened. The method for rapidly accessing to the wireless local area network of the invention comprises the following steps: shooting a barcode photo which stores wireless local area network information, wherein the wireless local area network information comprises a service set identifier (SSID) and a password; analyzing the wireless local area network information from the barcode photo; using the wireless local area network information to access to the wireless local area network.
Owner:上海云联计算机系统有限公司
Cosmetic composition
InactiveUS20030180232A1Improve abilitiesFeel goodPowder deliveryCosmetic preparationsDecompositionTitanium oxide
To provide a cosmetic composition having excellent ultraviolet protection against both UVB and UVA, causing neither unpleasant whitening to the applied skin nor skin irritation, and ensuring good feeling on use and high safety and high stability without causing decomposition of the ingredients blended in the cosmetic material, such as organic ultraviolet absorber. A cosmetic composition obtained by using fine particulate titanium oxide and fine particulate zinc oxide each surface-treated with silica, alumina or alumina / silica and having a primary particle size of 0.01 to 0.2 mum in combination and blending titanium oxide and zinc oxide at a mass ratio of 1:4 to 2:3, wherein SPF is maintained as compared with the case where the mass ratio of titanium oxide to zinc oxide is 1:0, and when applied to a thickness of 10 mum, the whiteness W value measured using the CIE color specification system is 20 or less.
Owner:SHOWA DENKO KK
Power network model-based wind power field automatic voltage control method
ActiveCN102832627AImprove voltage qualityImprove security and stabilitySingle network parallel feeding arrangementsReactive power adjustment/elimination/compensationWind drivenTransformer
The invention relates to a power network model-based wind power field automatic voltage control method which comprises the following steps of: 1, reading original data and building a wind power field power network mathematical model; 2, reading a wind power field real-time running working condition and a voltage target value released by the power grid dispatching; 3, carrying out load flow calculation to obtain initial load flow distribution on the basis of the former two steps; 4, distributing and releasing the reactive power reference value of a wind driven generator according to a sensitivity ordering strategy; 5, distributing and issuing the reactive power reference value of a dynamic reactive compensation device according to the sequence; and 6, confirming and releasing the tapping point gear reference value of an on-load tap changing transformer according to a step-by step adjustment strategy. According to the power network model-based wind power field automatic voltage control method, the unified coordination control among the reactive power of the wind power field wind driven generator, the reactive power of the dynamic reactive compensation device and the tapping joint of the on load tap changing transformer can be realized.
Owner:北京中科伏瑞电气技术有限公司
Cloud control navigator system for reporting road conditions in real time
InactiveCN106448226AAvoid false positivesImprove security and stabilityInstruments for road network navigationRoad vehicles traffic controlSpeed measurementElectronic map
The invention discloses a cloud control navigator system for reporting road conditions in real time. The system comprises a navigator which carries a positioning module, positions position information of a current vehicle through satellite navigation and transmits the position information to a base station; and the base station which is provided with a cloud road condition service system for receiving the real-time position information of the current vehicle, carrying out big data statistical analysis and transmitting road congestion conditions to the navigator. The navigator combines the received real-time road congestion conditions with an electronic map to form a real-time road condition map, gives a prompt to a car owner, and at the same time, analyzes a current vehicle speed and congestion conditions of a destination route set by the car owner and carries out route planning according to instruction conditions. The navigator is also provided with a query module, a speed measurement module, a sensing module, a prompt module and a communication module, and at the same time, also carries a voice operation system and a traditional button operation system, and a monitoring pick-up head capable of 360-degree rotation is also arranged in the vehicle. An automobile safety protection system can be improved.
Owner:SHENZHEN SOLING IND CO LTD
Maintenance risk based power equipment operation schedule optimizing method
ActiveCN107766971AImprove security and stabilityImprove operation and maintenance scheduling efficiencyForecastingTechnology managementDynamic planningPower grid
The invention provides a maintenance risk based power equipment operation and maintenance schedule optimizing method. The method includes a step S1 of collecting history operation and maintenance data; a step S2 of establishing an equipment operation and maintenance schedule optimizing target model according to the history operation and maintenance data; a step S3 of setting constraint conditionsfor operation of the equipment operation and maintenance schedule optimizing target model; a step S4 of grouping prior operation and maintenance schedules and adopting a dynamic planning method for solving the equipment operation and maintenance schedule optimizing target model; a step S5 of comparing the minimal costs of operation and maintenance work of each group and taking the operation and maintenance work of the group with the minimum cost as the optimal schedule scheme and executing the scheme. According to the invention, the optimal operation and maintenance schedule plan can be obtained, so that the operation and maintenance scheduling efficiency is improved, the scheduling practicability is ensured, safety and stability of a power grid is enhanced and operation and maintenance cost is reduced.
Owner:SHENZHEN POWER SUPPLY BUREAU
Highly stable movable scaffold for building
The invention discloses a highly stable movable scaffold for a building. The scaffold comprises a scaffold body, wherein the scaffold body is composed of a scaffold stand column and a scaffold cross rod, a chassis is arranged on the periphery of the bottom of the scaffold stand column, a pulley provided with a foot brake is connected to the bottom of the chassis, expansion links are arranged on the bottom portions of connecting pieces symmetrically arranged on the periphery of the middle of the scaffold stand column respectively, and a reinforcing base with a saw-toothed bottom is arranged on the bottom of each expansion link. The scaffold is convenient to move and high in stability, the pulley is arranged to enable the building scaffold to be moved conveniently, construction conducted with the building scaffold is facilitated, the foot pedal is arranged to prevent the pulley from sliding so that the overall stability of the scaffold can be improved, the saw-toothed reinforcing base is arranged to improve the stability of the scaffold, and then the using safety of the scaffold is improved.
Owner:WUXI CHENYUAN CONSTR EQUIP
Online evaluation system of secondary equipment of intelligent substation
ActiveCN104539051AImprove assessment accuracyAvoid unusual motion situationsCircuit arrangementsInformation technology support systemEvaluation resultMaster station
The invention relates to an online evaluation system for secondary equipment of an intelligent substation. The system comprises a master-station evaluation level and a transformer substation evaluation level, wherein the master-station evaluation level comprises an evaluation master station, the transformer substation evaluation level comprises a plurality of evaluation sub-stations which are arranged in all transformer substations respectively and multiple evaluation objects, corresponding to the evaluation sub-stations, of the relevant secondary equipment, the evaluation sub-stations are in communication with the corresponding multiple evaluation objects respectively through three-in-one network interchangers and communication lines, so that the evaluation parameters of the evaluation objects are collected, and the master station is in communication with the evaluation sub-stations through communication networks respectively so as to obtain the evaluation results of the evaluation sub-stations. The online evaluation system for the secondary equipment of the intelligent substation has the advantages that due to the fact that the online monitoring function of a monitoring system in the intelligent secondary equipment in the intelligent substation is used, in this way, excessive maintenance can be avoided, the workload of maintenance personnel is reduced, maintenance cost is reduced, and evaluation accuracy is extremely high.
Owner:STATE GRID JIANGSU ECONOMIC RES INST +3
Control system for wide domain wind-powered peak regulation of electric power system
ActiveCN101510694AImprove peak shaving performanceImprove security and stabilitySingle network parallel feeding arrangementsWind energy generationCommunication interfaceWide area
The invention discloses a peak regulating control system of wide area wind power in an electric power system, which comprises a system architecture of the peak regulating control system of wide area wind power unified in the whole network based on wide area measurement system (WAMS), a control signal selection of the peak regulating control system of wide area wind power, a control strategy of the peak regulating control system of wide area wind power and a controlling communication interfacing technology of the peak regulating control system of wide area wind power. The method belongs to the technical field of electric power system wide area control; a technical proposal of the invention can be used for solving the difficult problem that the electric system lacks the peak regulating control system of wide area wind power unified in the whole network; the constructed system is used as a new method of peak regulation when the peak regulating capacity of hydroelectric generating units and thermal power generating units is exhausted, can increase the peak regulating ability of grid and promote the security and stability level of the power grid.
Owner:BEIJING SIFANG JIBAO AUTOMATION +1
Photovoltaic direct current side energy storage based power grid intelligent regulation and control system
PendingCN105932704AImprove power qualityImprove power transmission and transformation efficiencySingle network parallel feeding arrangementsEnergy storageTransformerCharge discharge
The invention discloses a photovoltaic direct current side energy storage based power grid intelligent regulation and control system. The power grid intelligent regulation and control system comprises a regional main power grid, and a power grid dispatching control system, other power supplies and multiple photovoltaic stations which are connected with the regional main power grid separately; each photovoltaic station comprises a photovoltaic power generation unit, an energy storage unit, a power transmission unit, a power grid intelligent regulation and control sub system, an energy storage battery, a charging-discharging control unit, a bidirectional photovoltaic inverter, a voltage boosting-bucking transformer, a power grid and a power grid intelligent regulation and control sub system; and the power grid intelligent regulation and control sub system comprises a concentrated intelligent regulation and control sub system and an energy deployment management system. The power grid intelligent regulation and control sub system comprises the concentrated intelligent control unit and the energy deployment management system; and the stored electric energy of each photovoltaic station can be fully deployed through information exchange with the power grid dispatching control system, so that the consumption capability of the power grid on the large-scale clean energy, and the safety and stability level of the power system are improved, the thermal power ratio is lowered, and the energy consumption is reduced.
Owner:南京威尔泰电气工程有限公司
Transient stability strongly-correlated power transmission section identification method for power grid
ActiveCN104578050ASimple control schemeImprove system security, stability and automationData processing applicationsAc network circuit arrangementsElectric power transmissionSystem safety
The invention discloses a transient stability strongly-correlated power transmission section identification method for a power grid, and belongs to the technical field of power systems and automation thereof. Different regulation modes are determined based on a transient stability quantification theory for a power system, rules of changes of the transient stability limit of a section along with the power transmission power of another section in different regulation modes are calculated, and transient stability limit influence indexes between different sections are further calculated to identify transient stability strongly-correlated sections in the power grid. The method is favorable for power system scheduling and running staff to master the intrinsic running rules of the system and make a power grid scheduling and running control decision, and the safety, stability and automation level of the system are improved.
Owner:STATE GRID CORP OF CHINA +3
Electric power frequency modulation market transaction clearing and settlement method, device and system
ActiveCN111832824AImprove security and stabilityImprove FM capabilityMarket predictionsForecastingPower gridControl theory
The invention discloses an electric power frequency modulation market transaction clearing and settlement method, device and system, and the method comprises the steps of optimizing a frequency modulation auxiliary service, electric energy and a standby auxiliary service based on the frequency modulation information, frequency modulation capacity demands and frequency modulation mileage demands declared by all market main bodies, and obtaining a day-ahead frequency modulation plan; clearing the frequency modulation auxiliary service to obtain a rolling frequency modulation plan based on the day-ahead frequency modulation plan and the frequency modulation information of rolling updating of the market main body participating in frequency modulation in the day-ahead frequency modulation plan;clearing the electric energy and the standby auxiliary service, and clearing the frequency modulation auxiliary service to obtain a real-time frequency modulation plan according to the real-time market demand and the frequency modulation information of rolling updating of the market main body participating in frequency modulation in the rolling frequency modulation plan; and settling frequency modulation income based on the real-time frequency modulation plan. Rolling frequency modulation is introduced so that the scheduling mechanism is enabled to properly adjust the day-ahead frequency modulation plan, the rolling frequency modulation plan can be generated, the real-time frequency modulation plan can be acquired based on the rolling frequency modulation plan, and safety and stability ofthe power grid can be enhanced.
Owner:STATE GRID ELECTRIC POWER RES INST +3
Method for optimizing parameters of low-voltage current-limiting controller of weak receiving terminal power network direct-current transmission system
ActiveCN106356825AImproved recovery propertiesImprove control effectElectric power transfer ac networkEmergency protective arrangements for limiting excess voltage/currentLow voltageControl parameters
The invention discloses a method for optimizing parameters of a low-voltage current-limiting controller of a weak receiving terminal power network direct-current transmission system. The method comprises the following steps: establishing a simulated data platform; setting a running mode and a fault disturbance set; establishing an optimized model object function by adopting a particle swarm optimization algorithm; initializing a particle swarm, an optimum position of each particle and an optimum position of the particle swarm; starting iteration and updating the position and speed of each particle; calculating fitness of each particle; updating an optimum position through which each particle passes and an optimum position through which the particle swarm passes; and repeating the steps to obtain a parameter optimization result. According to the method disclosed by the invention, the establishment of the simulated data platform enables the optimized model object function to be able to accurately reflect the influence of VDCOL control parameters on safe and stable characteristics of an AC-DC power network, so that the parameters optimized by the method disclosed by the invention can achieve a better control effect under the condition with different running modes, faults and disturbance of a weak receiving terminal power network, thereby improving restoration characteristics of an AC-DC system, and promoting the safety and reliability levels of the system.
Owner:STATE GRID CORP OF CHINA +2
Net frame integral installation device and construction method thereof
PendingCN108360686ASimple structureEasy to assemble and disassembleBuilding constructionsEngineeringLeading line
The invention discloses a net frame integral installation device and a construction method thereof. The net frame integral installation device comprises a self-balancing lifting device, a temporary supporting seat and a temporary supporting frame for additionally adding rods in high altitude in a net frame joint. The construction method comprises the steps that (1) an original structure supportingseat of the net frame is installed; (2) the temporary supporting seat for additionally adding the rods in high altitude in the net frame joint is manufactured; (3) a net frame structure is assembled;(4) a temporary balance supporting seat and a main balance supporting seat are installed; (5) a hydraulic cylinder for lifting is installed; (6) the net frame is lifted; (7) the rods are additionallyadded in high altitude in the net frame; (8) the temporary supporting seat for additionally adding the rods in high altitude in the net frame joint is dissembled; (9) a self-balancing adjusting shoulder pole beam is dissembled; (10) the temporary balance supporting seat and the main balance supporting seat are disassembled; and (11) the temporary supporting frame is dissembled. According to the net frame integral installation device and the construction method thereof, self balancing is achieved between symmetrical force points on the temporary supporting frame in the lifting process, the center of a lifting device and the center of the temporary supporting frame are in the same lead line to ensure that the axis of the temporary supporting frame is stressed, the rods are accurately addedon the net frame, and the safety of lifting of the net frame and the accuracy of the construction are improved.
Owner:浙江中南绿建科技集团有限公司
Imprisoned object classification management system
InactiveCN106203789AImprove security and stabilityRaise the orderResourcesCentralized managementData collecting
The invention discloses an imprisoned object classification management system, and the system comprises a data collection module, a criminal penalty level evaluation module, a comprehensive quality evaluation module, a cell counting module, a separate control module, and a report output module. The system enables an imprisoned object to be distributed to a cell at a corresponding protection level according to the criminal penalty level, achieves the centralized management of serious criminals, facilitates the centralized distribution of prison resources, improves the utilization efficiency of prison resources, and improves the management safety of a prison. The system carries out further division of the distribution of an imprisoned object at the same criminal penalty level according to a danger coefficient, enables the imprisoned objects with the similar comprehensive quality to be managed in a centralized manner, facilitates the avoiding of unstable factors (fight and oppression), caused by strength difference, in the cells, and improves the prison management discipline sense and stability.
Owner:HEFEI COMPASS ELECTRONICS TECH
Retrospective management method, electronic commerce system and intelligent storage system construction method
InactiveCN107220788ATimely delivery requestAvoid duplicationResourcesLogisticsMaterials preparationDistribution system
The invention provides an intelligent storage system construction method. The computer technology, the network technology and an electronic commerce platform are utilized to construct a precise and high efficiency distribution system of electronic components, so the volume of a line bin is reduced, and the material preparation period, cost and management cost of the electronic components are reduced.
Owner:苏州云斯克信息科技有限公司
Novel method for online identification of coherent cluster of electric power system
InactiveCN104319762AImprove security and stabilityFast and accurate online identificationSystems intergating technologiesSpecial data processing applicationsReal-time dataElectric power system
Disclosed is a novel method for online identification of coherent clusters of an electric power system. The method comprises: first of all, a PMU measuring real-time power-angle locus information of a generator set after a fault occurs; then, performing normalization processing on the PMU measurement information to generate standard data; and finally, classifying the standard data by use of an improved support vector machine algorithm to obtain a final consistent cluster online identification result. By using the method provided by the invention, for all the operation modes and passably generated fault types of the electric power system, online real-time data measurement is carried out through the PMU, and the improved support vector machine algorithm is employed, such that the problems of large computational complexity, long calculating time, easily caused dimensionality disasters and the like by use of a conventional method are solved, and on the basis of accurate and rapid consistency cluster online identification, the safety and stability level of the electric power system is improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Quantitative evaluation index system of ultrahigh voltage connection mode and comprehensive evaluation method
ActiveCN108233435AUniform distribution of tidal currentImprove security and stabilityResourcesAc networks with different sources same frequencyIndex systemStability index
The invention discloses a quantitative evaluation index system of an ultrahigh voltage connection mode and a comprehensive evaluation method. The method comprises the following steps: constructing anAC-DC system model based on engineering parameters, so as to obtain running parameters of the AC-DC system model; obtaining flow distribution indexes and safety stability indexes based on the engineering parameters and the running parameters; performing level analysis to obtain each index weight in the flow distribution indexes and the safety stability indexes; drawing a sector radar map based oneach index weight of the flow distribution indexes and the safety stability indexes; extracting the characteristic quantity of each index of the flow distribution indexes and the safety stability indexes; forming an evaluation function to obtain an evaluation function value; and determining that the connection mode of connecting an ultrahigh-voltage DC system into an ultrahigh-voltage AC system ina corresponding ultrahigh-voltage AC-DC combined system is the optimal in case that the evaluation function value is the maximum. With the adoption of the system and the method, advantages and disadvantages of a DC receiving end connection mode can be effectively and comprehensively evaluated, and moreover, the safety and stability level of the AC system at the receiving end can be increased.
Owner:HUAZHONG UNIV OF SCI & TECH +3
Method for safety protection of intelligent reporting system of power system safety automatic device
ActiveCN101764428AImprove security and stabilitySolve security problemsCircuit arrangementsInformation technology support systemExternal dataPower grid
The invention discloses a method for the safety protection of the intelligent reporting system of a power system safety automatic device. The method comprises the system architecture of the intelligent reporting system based on power system safety automatic device; safety strategies of the intelligent reporting system; and the safety technology for data interaction between the intelligent reporting system and the external data. The invention belongs to the technical field of power system safety and stability control. The technical scheme of the invention is used to solve the difficulty that the power system lacks for the safety protection of the intelligent reporting system of the safety automatic device, the established system is used as the protection means of the intelligent reporting system and the safety and stability level of the grid is improved.
Owner:NORTHEAST CHINA GRID +1
Safety tower crane and an implementation method thereof
PendingCN111762699AReduce interactionFlexible arrangements for adding and dropping jointsCranesMarine engineeringTower crane
The invention provides a safety tower crane and an implementation method thereof. Tower body standard sections are detachably connected from bottom to top to form a tower body, a rotary structure comprises an inner ring and an outer ring which are rotationally connected, and one tower body standard section is sleeved with the inner ring; and a cargo boom and a balance arm are fixedly connected with the outer ring, and the cargo boom, the balance arm and the rotary structure form a whole. The crane further comprises a lifting device, and overall lifting is achieved through the lifting device. According to the safety tower crane, the mutual influences of tower crane section increase and decrease operation and cargo boom and balance arm lifting operation are effectively reduced, and the safety of the tower crane is improved.
Owner:CHINA CONSTR THIRD ENG BUREAU GRP CO LTD
Rollover prevention device for electric pole
The invention discloses a rollover prevention device for an electric pole. The rollover prevention device is installed on the electric pole and the ground, and comprises a stay wire, a detector and acontrol center. The detector is arranged on the ground. One end of the stay wire is connected with the top of the electric pole, and the other end of the stay wire is connected with the detector. Thedetector comprises a resistance wire, a wire winding roller, a power source, a digital current device, a controller and a wireless module; one end of the resistance wire is fixed, and the other end ofthe resistance wire is wound around the wire winding roller; the wire winding roller is installed on a rotating shaft, and a spring is arranged between the wire winding roller and the rotating shaft;the stay wire is connected with the resistance wire, and a loop is formed by the resistance wire, between the fixing end of the resistance wire and a wire outlet of the wire winding roller, the powersource and the digital current device; and a data port of the digital current device is connected with the controller, the controller is connected with the wireless module, and the control center isprovided with a wireless data module corresponding to the wireless module. The rollover prevention device can detect inclination of the electric pole in time and remind maintainers to correct, so thatrollover of the electric pole is effectively prevented, and the safety and stability of a power transmission network are improved.
Owner:STATE GRID SHANDONG ELECTRIC POWER CO TAOXIAN POWER SUPPLY CO
Integrated automation transformer substation
InactiveCN103855619AMeet the requirements of modern control operationImprove security and stabilityBus-bar/wiring layoutsBoards/switchyards circuit arrangementsTransformerIntegrated automation
The invention provides an integrated automation transformer substation. A first 35kV inlet wire is communicated with a first 35kV inlet wire switch, a No.1 main transformer, a first 10kV main transformer switch, a 10kV first section bus and a plurality of outlet wires thereof, a second 35kV inlet wire is communicated with a second 35kV inlet wire switch and a No.2 main transformer, then is communicated with a second 10kV main transformer switch, a 10kV second section bus and a plurality of outlet wires thereof, a third 10kV main transformer switch, a third section bus and a plurality of outlet wires thereof respectively, a first section switch and a lead are arranged between the first section bus and the second section bus, a third 35kV inlet wire is communicated with a third 35kV inlet wire switch, a No.3 main transformer, a fourth 10kV main transformer switch, a 10kV fourth section bus and a plurality of outlet wires thereof, a second section switch and another lead are arranged between the third section bus and the fourth section bus, and a transformer for a first station and a transformer for a second station are connected with the second section bus and the fourth section bus respectively through corresponding transformer switches for the stations, so as to supply power to the whole transformer substation. The integrated automation transformer substation can adapt to the controlled operation requirement of modern transformer substation, and improve the equipment operation reliability and the intelligent level of a power grid.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO
A centralized bidding trading system and method for electricity market trading
ActiveCN107292710BImprove reusabilityImprove scalabilityBuying/selling/leasing transactionsMarketingElectricity marketElectric power system
Owner:昆明电力交易中心有限责任公司
Water inlet structure vortex control device based on equal difference variable diameter arc
ActiveCN109469155AImprove inflow conditionsSafe and stable operationSewerage structuresPumping plantsEngineeringRebar
The invention discloses a water inlet structure vortex control device based on an equal difference variable diameter arc, and belongs to the technical field of pumping station engineering. The width dimension of a water inlet structure and the suspension height of a horn tube are taken as restraint conditions, the numerical value of diameter changing time n is determined, the equal difference variable diameter arc is drawn to be a planar curve, a reinforcing bar is adopted for production according to the planar curve, and rust preventing paints are brushed after the production is completed. The stretching length of the equal difference variable diameter arc is determined according to the suspension height of the horn tube, the planar curve is stretched to form the vortex control device, reinforcement is conducted on a spiral line of the vortex control device at interval using a reinforcing bar pull rod welding technology, the whole vortex control device is placed in a cylindrical groove of a bottom plate of the water inlet structure after the reinforcement is completed, sealing is conducted by using plain concrete, it is ensured that the elevation and flatness of the sealed top face and the top face of the water inlet structure are the same, so that the overall stability of the vortex control device is increased, and the problem of the loosening of the whole vortex control device caused by the long-term existence of grounding bolts in water and the vibration of a running unit is prevented.
Owner:YANGZHOU UNIV
Concealed safety monitoring device convenient to install
ActiveCN113251249AImprove security and stabilityImprove the range of use and securityTelevision system detailsColor television detailsMonitor unitStructural engineering
Owner:GUIZHOU POWER GRID CO LTD
Direct-current continuous commutation failure suppression method utilizing regulation capability of multifunctional energy storage device
InactiveCN111641225AImprove security and stabilitySuppression of successive commutation failuresElectric power transfer ac networkAc network load balancingAC - Alternating currentControl engineering
The invention provides a direct-current continuous commutation failure suppression method utilizing the regulation capability of a multifunctional energy storage device. According to the method, four-quadrant operation of an energy storage device is realized through a space vector pulse width modulation (SVPWM) technology, and after a commutation failure fault of an AC / DC system is detected, a fourth quadrant operation mode is quickly switched to so as to output active power and reactive power, so that the dynamic reactive power demand of an inverter in the commutation failure fault recovery process is improved, and the occurrence of continuous commutation failure of the system is inhibited. According to the invention, the adjusting capacity of the multifunctional energy storage device isfully utilized, and dynamic reactive power support is provided for the system in the commutation failure recovery process of the direct current system, so that continuous commutation failure of the system is restrained, safety and stability of the alternating current and direct current system are improved, and good engineering application value is achieved.
Owner:CENT CHINA BRANCH OF STATE GRID CORP OF CHINA +3
Method of recognizing power system transient stability negative correlation section based on trajectory
ActiveCN104901304AAvoid negative effectsSimple control schemeAc network circuit arrangementsSystem of imprimitivityTransient state
The invention discloses a method of recognizing a power system transient stability negative correlation section based on a trajectory, which belongs to the field of power systems and automatic technology thereof. The method of the invention is based on a power system transient stability quantification theory, system units are divided into a preceding group and a remaining group, a two-unit system is further formed equivalently until a single unit infinite system is formed equivalently, the number of peaks in first swinging of a system equivalent single unit infinite system power-angle response curve is used for initially judging whether a transient stability negative correlation section possibly exists in the system, if the peak number is larger than 1, two-unit equivalence based on an inertia center is further carried out on the preceding group and the remaining group respectively, and through comparing a power-angle phase difference at any moment of equivalent two units in different groups, whether a transient stability negative correlation section exists in the system is finally judged. A power system dispatching operator can master the internal operation rules of the grid, a grid dispatching operation control decision is made, and safety, stability and the automatic level of the system are enhanced.
Owner:STATE GRID CORP OF CHINA +2
Circulating cold compress device for orthopedic nursing
InactiveCN111588538AImprove comfortImprove stabilityTherapeutic coolingTherapeutic heatingCold airCold compresses
The invention discloses a circulating cold compress device for orthopedic nursing, and particularly relates to the technical field of orthopedic nursing instruments. The circulating cold compress device comprises a base; a cold compress seat is attached to the top of the base; connecting plates are fixedly connected to two sides of the cold compress seat; connecting blocks are fixedly connected tothe bottoms of the connecting plates on the two sides; a threaded cap is embedded in one side of the connecting block on one side; a threaded column is in threaded connection with the interior of thethreaded cap; rotating shafts are fixedly connected to the two ends of the threaded column; bearings are arranged on the outer side walls of the rotating shafts in a sleeving mode; first fixing plates are embedded in the outer side walls of the bearings; and handles are fixedly connected to one ends of the rotating shafts. By arranging an upper air bag and a lower air bag, cold air in the upper air bag and the lower air bag can be circularly input through circulating refrigeration of a refrigerating machine; and compared with the prior art, the duration time needed by cold compress is met, and extrusion cold compress and fitting cold compress of different affected parts can be effectively adapted, so that the cold compress comfort is remarkably improved.
Owner:金敏
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