Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

37results about How to "Conducive to security and stability" patented technology

Public security integrated management system and public security integrated management method

The invention provides a public security integrated management system and a public security integrated management method. the public security integrated management system comprises a dangerous material management subsystem for carrying out information acquisition, information analysis and video monitoring on a dangerous material warehouse-in process, a storage process, a warehouse-out process, a transportation process, a handover process, a distribution process and a use process, and a special place management subsystem for carrying out information acquisition, information analysis and video monitoring on an activity place and a fixing place. Prevention first and prior control serves as a rule, early warning, warning and alarming signals are sent out automatically through setting a threshold, graded management is realized in match with a provincial public security authority, a city public security authority, a county public security authority and an area public security authority, an information flow is used for guiding a material flow, various activities and places are monitored in real time through the information technology and a video point adjustment system, happening of dangerous material logistics accidents and special place emergencies and illegal events can be effectively prevented, and public security and social stability are facilitated.
Owner:LIAONING CHENGYUAN BLASTING ENG

Active power optimization method for combined transmission of wind power and thermal power

A large-scale intelligent control system for the combined transmission of wind power and thermal power comprises a control center station, a control master station, a control substation, a wind farm control execution station and a thermal power plant control execution station, wherein the control center station is connected with the control master station through a special fiber channel; the control master station is connected with the control substation through a special fiber channel; and the control master station is connected with the control execution stations through a special fiber channel. A central processing unit of the control center station is installed with active power optimization method software for achieving the combined transmission of the wind power and the thermal power. Using the existing commercial software, the method can calculate the active power requirement of the section for combined transmission of the wind power and the thermal power in each operation period under various kinds of operation modes so as to reasonably arrange the planned power curve of units. During operation, the method can send the active power requirement of the section according to the ultra-short period wind power prediction result in each fixed period, and can optimize the power generation capacity of the wind power units and the thermal power units while considering the regulation characteristics of the wind power units and the thermal power units. The method can effectively reduce the active power fluctuations, which facilitates the safety and stability of the system so as to maximally utilize the wind power.
Owner:STATE GRID GANSU ELECTRIC POWER CORP

An intelligent street lamp control system

The invention relates to an intelligent street lamp control system, belonging to the technical field of street lamp control. The system includes a cloud server, a street lamp centralized controller and a single lamp controller; the cloud server includes a port monitoring service, a database, a short message sending service, and a mobile terminal interface. The street lamp centralized controller comprises a commercial mobile communication transceiver module, a memory, a current controller, a power carrier communication module, a clock module, a position positioning module, a sensor module and afunction expansion module. The single lamp controller comprises a power carrier communication module, a dial switch, a memory, a clock module, a sensor module and a function expansion module. The cloud server sends control commands to the street lamp centralized controller. The street lamp centralized controller controls the single lamp controller, and the single lamp controller controls the switch of the street lamp and the brightness adjustment. The single lamp controller collects the street lamp data at regular intervals and uploads the data to the street lamp centralized controller, whichprocesses the data and uploads the data to the cloud server. The invention supports the upgrading of the old city, is reliable and stable, and has strong expansibility.
Owner:江苏天傲通新能源科技有限公司

Staircase mine waste reservoir drainage method

The invention discloses a staircase mine waste reservoir drainage method; a staircase mine waste reservoir comprises three or more than three independent mine waste reservoirs which are sequentially distributed from top to bottom along the landform; the construction steps of the method are that: a flood detention dam is built on the staircase mine waste reservoir, a main drainage facility inlet isarranged nearby the flood detention dam; a main drainage facility is distributed on one shore side of the staircase mine waste reservoir, which has good geology and topographic conditions, and movesaround the staircase mine waste reservoir from one side and is extended into downstream; the three mine waste reservoirs at the upstream, midstream and downstream drain flood water respectively and adopt branch drainage systems which are respectively connected with the main drainage facility. The method has the advantages that: the drainage pressure in the mine waste reservoir is greatly reduced,the risk that the branch drainage systems are covered by mine waste load and are damaged owning to great pressure is reduced, thereby being beneficial to the safety and stability of the mine waste reservoir, realizing shunting of clean water and polluted water, being helpful of protecting environment and greatly improving the safety reliability of the whole staircase mine waste reservoir and the drainage systems.
Owner:CHINA NERIN ENG

Multi-agent based ordered charging method of electric automobile

ActiveCN107150601AImprove the effect of real-time charging optimizationReal-time charging optimization works wellCharging stationsElectric vehicle charging technologyReal-time chargingConstant power
The invention provides a multi-agent based ordered charging method of an electric automobile. The method is characterized in that a home agent and a transformer substation agent coordinately work to service a power grid agent to handle with a large amount of complex charging requests in a distribution manner; and the charging behavior of the electric automobile is scheduled through a real-time greedy algorithm. According to the method, the current real-time energy demand information and the charging time arrangement of the electric automobile, rather than the information of the electric automobile to be connected to a power grid in future and a complex prediction method and the optimizing technology, are needed, so that the expansion is high; and the method is applied to the high permeability condition of the electric automobile. The charging process of the electric automobile is a constant-power continuous charging process through which a battery of the electric automobile is prevented from being frequently switched among the charging modes, and the influence of the charging schedule on the service life of the battery of the electric automobile can be reduced to the maximum. With the adoption of the method, the real-time charging optimizing effect of the electric automobile is effectively improved; the peak shaving and load shifting can be performed well while the user demand is met and the user charging cost is decreased, and the power grid stability is ensured.
Owner:XI AN JIAOTONG UNIV

Method for setting highway amphibian passage system

InactiveCN103790116AChoose scientifically and reasonablyAct as a "stepping stone"Ground-workWater diversionEngineering
The invention relates to a method for setting a highway amphibian passage system. The method includes determining position of the highway amphibian passage system, setting amphibian migration inducing habitat like a micro pool group and a migration corridor, setting amphibian migration corridor protection facilities like C-shaped structures, structures easy for amphibians to go in an out and warning signs, and evaluating effect of the amphibian passage system. By the highway amphibian passage system, comprehensive functions of realizing water diversion and allowing the amphibians to go through can be realized at the same time and do not interfere each other, and needs for passing through of part of reptiles and small-medium-sized mammals can be met. The method can be used for optimizing the highway amphibian passage system of reconstructed and extended highways and can be used for guiding setting of the highway amphibian passage system of new highways.
Owner:CHINA ACAD OF TRANSPORTATION SCI

Data integration management system for power grid big data application and implementation method thereof

The invention discloses a data integration management system for power grid big data application and an implementation method of the data integration management system. The data integration managementsystem comprises a process design toolkit, wherein the process design toolkit comprises a foreground page module and a background plug-in framework, the foreground page module is used for providing dragging and drawing flow chart elements to realize the setting of data stream operation plug-in object attribute values and data stream operation execution sequences; the background plug-in frameworkis used for providing plug-in objects for different functional data stream operations, and the plug-in objects are formed by packaging based on data stream operation functions; and setting parametersinput by the foreground page module are mapped and converted into the plug-in objects, the plug-in objects operated by different functional data streams in the background plug-in framework are loadedby utilizing a class loader, a data integration interaction process setting function is realized, and an execution result of the data stream operation is displayed by means of the foreground page module. The data integration management system can adapt to power grid application data integration-oriented customized logic development, and has the advantages of service implementation agility, expansibility and flexibility.
Owner:NARI TECH CO LTD +1

Hydraulic junction facility

InactiveCN104963322AGraded water intake convenienceSuitable water temperatureBarrages/weirsWater useWater diversion
The invention provides a hydraulic junction facility. The structure of the hydraulic junction facility comprises a vertical well type spillway, a horn mouth, a transition segment, a vertical well, an axial line of the vertical well, a pressing slope segment, an energy dissipation well, an annealing tunnel, water taking inclined culverts, water inlets, flap valves, rubber water-stop belts, a breather pipe, a water diversion branch hole, irrigation channels, an annealing tunnel outlet gate, a gate pier, a gate hoist, bank slope bed rocks, an earth and rockfill dam, a reservoir area (the upstream) and riverways (the downstream). In the low water level, inclined lying culvert pipes are utilized to carried out water taking, energy dissipation and water conveying are achieved by utilizing the vertical well type spillway, the annealing tunnel outlet gate is closed to raise a waterhead, the irrigation elevation is increased, and the water using requirement in the downstream is met. The inclined lying culvert pipes are connected with the vertical well type spillway, the vertical well type spillway is utilized to replace a culvert pipe arranged on the lower portion of a dam, and the adverse influence on the culvert pipe arranged on the lower portion of the dam is avoided.
Owner:NANCHANG UNIV

Online monitoring method for states of secondary device of distribution network

InactiveCN104122473ACorrectly identify the working statusReduce workloadElectrical testingPower gridSmart grid
The invention discloses an online monitoring method for states of a secondary device of a distribution network. The online monitoring method includes: quantities of states of corresponding devices are acquired by a plurality of acquisition units; if the state quantity of one of the devices is larger than an alarm threshold value, by the aid of the corresponding acquisition unit, alarm signals are transmitted to the acquisition units of the other devices, and abnormal data are transmitted to a server; an instruction is transmitted by the server, and the state quantities of the other devices are acquired by the acquisition units of the corresponding devices; the state quantities of the other devices are compared with the abnormal data by the acquisition units of the corresponding devices, and comparison results are reported to the server; by the aid of the server, a querying instruction transmitted by a client end is received and the abnormal data are transmitted to the client end. The online monitoring method has the advantages that working states of the secondary devices of a power grid can be recognized effectively, quickly and accurately, workload of maintainers is reduced, and safety and stability of the intelligent power grid are benefited.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO

State monitoring system and monitoring method of intelligent distribution network equipment

InactiveCN103837786ACorrectly identify the working statusReduce workloadTransmission systemsCircuit arrangementsSecondary loopSmart grid
The invention discloses a state monitoring system of intelligent distribution network equipment. The state monitoring system of the intelligent distribution network equipment comprises a primary signal detector, a plurality of secondary signal detectors, a server which is connected with the primary signal detector and the secondary signal detectors, a power source which is connected with the primary signal detector and the secondary signal detectors, and a plurality of client terminals which are connected with the server, wherein each secondary signal detector is connected with a secondary circuit load, the signal detectors are used for conducting state quantity detection and characteristic quantity extraction on the equipment and loop which are detected by a secondary circuit, the server is used for processing and storing the data of the primary signal detector and the data of the secondary signal detectors, and the client terminals are used for checking the data stored in the server. The invention further discloses a state monitoring method of the intelligent distribution network equipment. By means of the state monitoring system and monitoring method of the intelligent distribution network equipment, the operating state of power grid secondary equipment can be recognized effectively, rapidly and correctly, so that the workload of maintenance personnel is reduced, and the safety and stability of an intelligent power grid are facilitated.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO

Well point dewatering device and system, and construction method of well point dewatering device

The invention discloses a novel well point dewatering device and system, and a construction method of the well point dewatering device. The well point dewatering device includes an anti-slide pile body, a load bearing plate is arranged on the lower side of the anti-slide pile body, a prefabricated pipe and a sand gravel layer are arranged on the lower side of the loadbearing plate, the sand gravellayer is arranged on the outer side of the prefabricated pipe, a submersible pump is arranged in the prefabricated pipe, and the submersible pump pumps the groundwater of the prefabricated pipe to the outside of the well point precipitation device through a submersible pump water pipe. The prefabricated pipe is arranged at the bottom of the anti-slide pile body for storing water, the occupied space of the well point dewatering device is greatly reduced, the well point dewatering device is also allowed to be arranged close to a target, water storage is abound, the effect is good, accumulated water at the bottom of the anti-slide pile body can be timely discharged through the submersible pump, the effect of supporting the anti-slide pile body is achieved in combination with the load bearingplate, the condition of softness of land parcel blocks of the pile bottom of the anti-slide pile body can be prevented, long-term stability of the anti-slide pile body is ensured, and the condition of the collapse of the slope is eliminated.
Owner:宁德沙埕湾跨海高速公路有限责任公司 +1

Supporting structure for extremely-narrow coal pillar roadway driving along goaf and construction method of supporting structure

The invention discloses a support structure and a construction method for an ultra-narrow coal pillar gob-gob roadway. The support structure for an extremely narrow coal-pillar gob-gob roadway is a structural form in which the roof of the roadway is supported by an anchor beam net; for The solid coal side of the roadway is supported by coal side bolts; on the goaf side of the roadway, steel shed legs and anchors are used for support. The steel shed legs are connected by the upper arched section and the lower straight leg section by clamping cables; The straight leg section is located on the side of the coal pillar, and the top of the arched section extends to the roof of the roadway. The invention can not only improve the resource recovery rate, but also effectively maintain the roadway space, which is beneficial to ventilation and pedestrians.
Owner:ANHUI PROVINCE COAL SCI RES INST

Pot cover capable of achieving quick heat dissipation

PendingCN107669139ANo loss of temperatureNo loss of pressureCooking-vessel lids/coversEngineeringMechanical engineering
The invention relates to a pot cover capable of achieving quick heat dissipation. The pot cover includes a pot cover body and a pot cover handle connected with the pot cover body; the lower portion ofthe pot cover body is fixedly connected with a dislocation switch bottom plate, and several first through holes are uniformly formed in the dislocation switch bottom plate; a cavity is formed betweenthe pot cover body and the dislocation switch bottom plate, a dislocation rotating disk is arranged on the dislocation switch bottom plate in a close mode, the dislocation rotating disk is uniformlyprovided with several second through holes communicated with the first through holes, and one side of the dislocation rotating disk extends out of the pot cover body; the pot cover body is provided with a sliding groove used for making the dislocation rotating disk rotate; a fan is arranged in the cavity and driven by a motor, and a plurality of steam vents are arranged on the part of the pot cover body, on the upper side of the cavity.
Owner:品行量子科技(广东)有限公司

A Multi-Agent Based Electric Vehicle Orderly Charging Method

ActiveCN107150601BImprove the effect of real-time charging optimizationReal-time charging optimization works wellCharging stationsElectric vehicle charging technologyReal-time chargingConstant power
The invention provides a multi-agent based ordered charging method of an electric automobile. The method is characterized in that a home agent and a transformer substation agent coordinately work to service a power grid agent to handle with a large amount of complex charging requests in a distribution manner; and the charging behavior of the electric automobile is scheduled through a real-time greedy algorithm. According to the method, the current real-time energy demand information and the charging time arrangement of the electric automobile, rather than the information of the electric automobile to be connected to a power grid in future and a complex prediction method and the optimizing technology, are needed, so that the expansion is high; and the method is applied to the high permeability condition of the electric automobile. The charging process of the electric automobile is a constant-power continuous charging process through which a battery of the electric automobile is prevented from being frequently switched among the charging modes, and the influence of the charging schedule on the service life of the battery of the electric automobile can be reduced to the maximum. With the adoption of the method, the real-time charging optimizing effect of the electric automobile is effectively improved; the peak shaving and load shifting can be performed well while the user demand is met and the user charging cost is decreased, and the power grid stability is ensured.
Owner:XI AN JIAOTONG UNIV

Three-dimension design method for side slope gentling for surface loose bed of open-pit mine

ActiveCN110700285APrevent Landslide HazardsAccurate Strip Volume InformationGeometric CADExcavationsMining engineeringStructural engineering
The invention provides a three-dimension design method for side slope gentling for a surface loose bed of an open-pit mine. According to the three-dimension design method for side slope gentling for the surface loose bed of the open-pit mine, an overall final side slope design is based, the intersection line of a rocky step side slope and a loose bed bottom plate is taken as a starting point, andthe side slope of the loose bed is gentled upwards according to the thickness of the loose bed, the angle of the side slope, and other parameters; a realization method for side slope gentling for theloose bed in different surface shapes is provided; side slope gentling for the surface loose beds of singe-line mining boundaries and double-line mining boundaries are realized through three-dimensional modeling; the purpose of a three-dimensional design for side slope gentling for the loose bed is achieved; and a three-dimensional model of a gentled side slope of the surface loose bed is constructed. The invention provides a design method for side slope gentling for a surface loose bed of an open-pit mine, and used for lowering the landslip risk of a surface loose body, and providing technical support for a complete and comprehensive safety design for the mining boundaries of the open-pit mine.
Owner:CENT SOUTH UNIV

Multifunctional intelligent household router and application method

ActiveCN112198848AImprove comfortUnder the premise of comfort requirements, improve the utilization efficiency of electric energyComputer controlData switching networksHome usePower grid
The invention discloses a multifunctional intelligent household router and an application method, and aims to realize bidirectional friendly interaction between a user side and a power grid side, provide a comfortable intelligent household environment for a user, facilitate man-machine interaction and management, and guarantee diversified services such as power utilization requirements of the user. The router comprises a router body and a power line carrier module, the router body is connected with a server of a power supply company through the power line carrier module, and the router body isconnected with intelligent household equipment through a wired or wireless network. According to the invention, the bidirectional friendly interaction, intelligent household control and network routing between the power grid and the power supply company, and a communication method between the multifunctional household router and an intelligent household, the user and the power supply company canbe realized, so that convenience is brought to the user, the comfort of a household environment is improved, the utilization efficiency of energy is improved, and the expenditure of the user is reduced.
Owner:STATE GRID HUNAN ENERGY SAVING SERVICE

Dynamic game-based service openness and security control assessment method of cloud service environment

The invention discloses a dynamic game-based service openness and security control assessment method of a cloud service environment. The method includes the following steps that: 1, equalization strategies in the aspects of service and security of the cloud service environment are coordinated, so that an external subsidy condition for ensuring the complete service openness of a provider and an internal security condition for guaranteeing complete control on the normal use of a user; and 2, a service sensitive type and prudent type service openness assessment method is constructed based on the external subsidy condition, and a security control assessment method is constructed based on the internal control condition and according to Bayesian formula. With the method of the invention adopted, the service openness and security control of the cloud service environment can be assessed quantitatively, and the service openness and security control results of the cloud service environment under optimal security investments and optimal external subsidies can be obtained, and therefore, guidance can be provided for the cloud service provider in the formulation of service openness and security control coordinated operation strategies, and the healthy growth, security and stability of cloud services can be promoted.
Owner:HEFEI UNIV OF TECH

A smart password network real-name identity management method and platform

The invention relates to a smart password network real name system identity management method and platform, and relates to a method and a system for ensuring network information security. The platform comprises a designated agency, a netizen identity information library, relevant departments, a public security department identity card database, an information or transaction service website application server, an authentication client, and a smart password signature identity identification and authentication server. The method comprises the following running steps: putting real identities on records; registering a rule password; and docking smart password signature identity identification with network real name system identity management by putting the real identities on records and registering the rule password. Through adoption of the smart password network real name system identity management method and platform disclosed by the invention, netizen personal information is managed in a centralized way, so that an online anonymous and practical real name mechanism is realized; the mental habits of netizens are conformed; identity tracking can be performed as necessary; and the personal information security and network information security are ensured.
Owner:BEIJING PASSWORD TECH

A multifunctional smart home router and its application method

The invention discloses that in order to realize the two-way friendly interaction between the user side and the grid side, provide users with diversified services such as a comfortable smart home environment, convenient human-computer interaction and management, and guarantee the user's electricity demand, the invention proposes a A multi-functional smart home router and an application method thereof, the router includes a router body and a power carrier module, the router body is connected to a server of a power supply company through the power carrier module and a power line, and the router body is connected to smart home devices through a wired or wireless network. The present invention can realize two-way friendly interaction between the power grid and the power supply company, smart home control, network routing multifunctional home router and its communication method with smart home, users, and power supply companies, so as to facilitate users and improve the comfort of the home environment While improving energy utilization efficiency and reducing user expenses.
Owner:STATE GRID HUNAN ENERGY SAVING SERVICE

Concrete face rockfill dam soft foundation reinforcing structure and construction method

The invention discloses a concrete face rockfill dam soft foundation reinforcing structure and a construction method. The concrete face rockfill dam soft foundation reinforcing structure comprises a geogrid reinforced cushion layer, a geocell reinforced cushion layer and gravel piles which are arranged in a dam body; the top ends of the gravel piles are fixedly wrapped with composite geotextiles, and the gravel piles extend into a soft foundation; a dam body filler is arranged on the top layer of the soft foundation; and a concrete face is arranged on the surface layer of the dam body filler, the bottom end of the concrete face is connected with a concrete connecting plate, a concrete anti-seepage wall is arranged at the bottom of the tail end of the concrete connecting plate and extends into the soft foundation, and an anti-seepage curtain is arranged at the bottom of the concrete anti-seepage wall. The differential settlement deformation of the earth and rockfill dam can be effectively controlled, the possibility of foundation liquefaction is reduced, and the stability of the earth and rockfill dam is improved.
Owner:CHINA THREE GORGES CORPORATION

Control method for whole-plant primary frequency modulation of one-pipe multi-machine hydropower station

The invention discloses a whole-plant primary frequency modulation control method for a one-tube multi-machine hydropower station, and relates to the field of power system control optimization, and the method comprises the steps: inputting a primary frequency modulation function, collecting the frequency, guide vane opening, active power and primary frequency modulation action signals of each unit, and setting an artificial frequency dead zone; judging a speed regulation system control mode; selecting a unique frequency input signal of primary frequency modulation control of the whole plant, and judging a primary frequency modulation action direction; determining a unit dynamic input sequence under different control modes and different action directions of primary frequency modulation; the deviation value of the actual action quantity and the theoretical action quantity of the primary frequency modulation is calculated and compared with the control dead zone until the deviation value is within the range of the control dead zone, the problem that the primary frequency modulation performance is unqualified due to the strong coupling effect between the units of the one-pipe multi-machine hydropower station is solved, and the primary frequency modulation regulation control effect is improved.
Owner:GUODIAN SCI & TECH RES INST

Normal-conduction high-speed magnetic levitation beam end butt strap structure

The invention belongs to the technical field of normal-conduction high-speed magnetic levitation bridge beam seam devices, and particularly relates to a normal-conduction high-speed magnetic levitation beam end butt strap structure which comprises a T-shaped butt strap and two continuous beam bodies. The T-shaped butt strap comprises a T-shaped butt strap track plate beam and a T-shaped butt strap small pier stud connected with the bottom surface of the T-shaped butt strap track plate beam; the two ends of the T-shaped butt strap track plate beam are arranged on the two continuous beam bodies respectively, and the T-shaped butt strap small pier stud is arranged between the two continuous beam bodies. Clamping elastic steel plates are fixed to the two sides, in the transverse bridge direction, of the T-shaped butt strap small pier stud, beam end clamping grooves are formed in the beam end side faces, close to each other, of the two continuous beam bodies, and the clamping elastic steel plates on the two sides of the T-shaped butt strap small pier stud are clamped in the beam end clamping grooves of the two continuous beam bodies respectively. Equalization, stability and reliability of the parting and the stability of the T-shaped butt strap can be guaranteed, the running comfort of the maglev train is improved, and the safety and stability of high-speed running are improved.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP

Evaluation method of service openness and security control in cloud service environment based on dynamic game

The invention discloses a dynamic game-based service openness and security control assessment method of a cloud service environment. The method includes the following steps that: 1, equalization strategies in the aspects of service and security of the cloud service environment are coordinated, so that an external subsidy condition for ensuring the complete service openness of a provider and an internal security condition for guaranteeing complete control on the normal use of a user; and 2, a service sensitive type and prudent type service openness assessment method is constructed based on the external subsidy condition, and a security control assessment method is constructed based on the internal control condition and according to Bayesian formula. With the method of the invention adopted, the service openness and security control of the cloud service environment can be assessed quantitatively, and the service openness and security control results of the cloud service environment under optimal security investments and optimal external subsidies can be obtained, and therefore, guidance can be provided for the cloud service provider in the formulation of service openness and security control coordinated operation strategies, and the healthy growth, security and stability of cloud services can be promoted.
Owner:HEFEI UNIV OF TECH

On-line monitoring system for state of secondary equipment of distribution network

InactiveCN104133145ACorrectly identify the working statusReduce workloadTransmission systemsElectrical testingSmart gridMonitoring system
The invention discloses an on-line monitoring system for the state of secondary equipment of a distribution network. The on-line monitoring system comprises a plurality of signal detectors arranged in parallel and used for carrying out state quantity detection and characteristic quantity extraction on the equipment and loops to be detected, a server connected with the signal detectors, and a plurality of client sides connected with the server. The server is used for processing data of the signal detectors. The client sides are used for viewing data stored in the server. Each signal detector comprises a signal transmitting and receiving unit, and the signal transmitting and receiving units of the signal detectors are connected with one another and connected to the server respectively and are used for data exchange and comparison between the signal detectors. The on-line monitoring system can recognize the working state of the secondary equipment of a power grid effectively, quickly and correctly, reduce the workload of maintenance personnel and promote the safety and the stability of the power grid.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1

Method for producing 1,3-dioxolan-4,6-dione compound

A method for producing a 1,3-dioxan-4,6-dione compound from a ketone compound and a malonic acid, the method comprising: precipitating a 1,3-dioxan-4,6-dione compound as a crystal from a mixed solvent comprising a first organic solvent having a dielectric constant of 10 or more and a water, so as to form a precipitated 1,3-dioxan-4,6-dione compound; and isolating the precipitated 1,3-dioxan-4,6-dione compound by a solid-liquid separation.
Owner:FUJIFILM CORP

Method for judging out-of-step oscillation of power system

The invention relates to a method for judging out-of-step oscillation of a power system, which comprises the steps of: selecting any two measuring points in the power system, taking positive sequence voltage phases of the measuring points as measuring point phases, wherein a phase angle difference between the two measuring points is used as a phase angle difference of a phase comparison interval (i.e. an interval between the two measuring points). The method is characterized in that: on a change track of the phase angle difference of voltages at two sides of the interval in which an oscillation center is located, the change range of the phase angle difference is divided into 7 regions, if the phase angle difference change track of the phase comparison interval meets a certain change principle, the region between the two measuring points is judged to be step out oscillation. The invention discards the influences of the system operation mode, can be used for independently judging the system to be out-of-step, and is simple in practice.
Owner:NR ELECTRIC CO LTD +1
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products