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36 results about "Power pool" patented technology
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Power pooling is used to balance electrical load over a larger network (electrical grid) than a single utility. It is a mechanism for interchange of power between two and more utilities which provide or generate electricity For exchange of power between two utilities there is an interchange agreement which is signed by them, but signing up an interchange agreement between each pair of utilities within a system can be a difficult task where several large utilities are interconnected. Thus, it is more advantageous to form a power pool with a single agreement that all join. That agreement provides established terms and conditions for pool members and is generally more complex than a bilateral agreement.
Large electric network on-line preventing control method based on static state and transient safety steady mode
ActiveCN101299539AGuaranteed stability and securityOptimize safety and stability preventive control measuresSystems intergating technologiesSpecial data processing applicationsTransient statePower grid
A power pool online precaution control method based on the static state and the transient safe stable mode, includes: 1) obtaining the transient state process, 2) seeking the transient state and the static state safety margins, 3) performing the pattern classification to the failure, 4) trying to the obtain the adjusting project which satisfies all the failure modes, 5) computing the participation factor of the unsafe candidate control measurement of the transient state voltage and the frequency and sorting, 6) computing the sensitivity of the participation factor of each overload candidate control measurement after the failure and sorting, 7) obtaining the new mode data after adjustment and checking the safety of the static state and the transient state. The invention performs the coordination optimization among the transient power angle, the transient voltage / frequency and the static state device overload precaution control through integrating the control measurement participation factor of each mode, obtains the optimized safe and stable precaution control measure for satisfying the practical requirement of the engineering.
Owner:NARI TECH CO LTD +1
Power Supplies for Pool and Spa Equipment
ActiveUS20120222997A1Batteries circuit arrangementsTreatment involving filtrationPower couplingPower cable
Power supplies for pool and spa equipment are disclosed. In one embodiment, the power supply includes a buoyant housing, a peripheral float, at least one solar cell positioned on the buoyant housing for collecting sunlight and converting same to electrical energy, and a power cable for interconnecting the power supply and pool / spa equipment. In other embodiments, first and second inductive power couplings are provided for powering pool and spa equipment. The power couplings can also be installed using existing plumbing features of the pool or spa.
Owner:HAYWARD IND INC
Power over ethernet switch node for use in power pooling
InactiveUS20050080516A1Alleviate power needsIncrease productionMechanical power/torque controlLevel controlPower flowPower sharing
The present invention provides for an Ethernet switch node providing power over Ethernet functionality for use in a power pooling system comprising at least one pooling controller, the Ethernet switch node providing power over Ethernet functionality comprising: a DC power source; an electrical load connected to the DC power source; a power sharing circuit responsive to an output of the at least one pooling controller, the power sharing circuit being operative to govern electrical power provided by the DC power source; and a DC electrical power connection to the DC power source and the electrical load, permitting external DC electrical power flow to and from the DC electrical power consuming and providing entity, wherein the Ethernet switch node providing power over Ethernet functionality has multiple modes, including a first operative mode in which the DC power source may provide more electrical power than is consumed by the electrical load.
Owner:NEVERMORE SOLUTIONS
Power distribution system and method thereof in which redundant power is collected only when power pool is below or equal to pool threshold
InactiveUS8219839B2Shorten the timeEffective recoveryVolume/mass flow measurementHardware monitoringPower modeElectric power distribution
A power distribution system is adapted to a management module connected to a plurality of servers, each of which is varied in power consumption in response to a power mode and performance thereof, via a power allocation request line and a power allocation response line. The management module records the upper-limit power setting, the power allocations, and the power pool with regard to the servers. The server records the power mode, the power allocation, the upper mode request threshold, and the redundant power which is calculated based on the difference between the power allocation and the actual power consumption. The management module recovers the redundant power from the server so as to update the power pool. Upon receiving a power allocation request, the management module distributes at least a part of the power pool to the server, thus allowing the server to shift the power mode to the upper mode.
Owner:NEC CORP
Direct current power pooling for an ethernet network
InactiveUS20050078422A1Alleviate power needsIncrease productionMechanical power/torque controlLevel controlPower flowEngineering
The present invention provides for a DC power pooling system for an Ethernet network comprising: a plurality of DC electrical power consuming and providing Ethernet nodes, each of the plurality of DC electrical power consuming and providing Ethernet nodes having at least a first operative mode in which it may provide more electrical power than it consumes and a second operative mode in which it may consume more electrical power than it provides; electrical power interconnections, interconnecting the plurality of DC electrical power consuming and providing Ethernet nodes and permitting electrical power flow thereto and therefrom; and at least one controller in communication with the plurality of DC electrical power consuming and providing Ethernet nodes and being operative to employ the communication to govern electrical power provided by at least one of the plurality of DC electrical power consuming and providing Ethernet nodes.
Owner:NEVERMORE SOLUTIONS
Direct current power pooling
InactiveUS20050146219A1Prevent excess power flowReduce needMechanical power/torque controlBatteries circuit arrangementsElectric forcePower flow
The present invention provides for a DC power pooling system comprising: a plurality of DC electrical power consuming and providing entities, each of the plurality of DC electrical power consuming and providing entities having at least a first operative mode in which it may provide more electrical power than it consumes and a second operative mode in which it may consume more electrical power than it provides; DC electrical power interconnections, interconnecting the plurality of DC electrical power consuming and providing entities and permitting electrical power flow thereto and therefrom; and at least one pooling controller operative to vary at least one of voltage, output impedance and current of electrical power provided by at least one of the plurality of DC electrical power consuming and providing entities.
Owner:NEVERMORE SOLUTIONS
System software for managing power allocation to Ethernet ports in the absence of mutually exclusive detection and powering cycles in hardware
A method of allocating power to ports in an Ethernet switch, including: (1) determining the available capacity of a power pool used to supply the ports, (2) assigning a configuration power to each of the ports, (3) selecting a port to be enabled, (4) determining whether the available capacity of the power pool exceeds the configuration power assigned to the selected port, and, if the available capacity of the power pool exceeds the configuration power assigned to the selected port, then (4) subtracting the configuration power assigned to the selected port from the available capacity of the power pool, (5) enabling and powering the selected port and simultaneously detecting whether the selected port is connected to a powered device, and (6) adding the configuration power assigned to the selected port to the available capacity of the power pool if the port is not connected to a powered device.
Owner:ARRIS ENTERPRISES LLC
Power pool-based dual-layer bus direct microgrid and control method therefor
ActiveCN106505552AIncrease flexibilityReduce conversion lossLoad balancing in dc networkDc source parallel operationMicrogridHigh energy
The invention relates to a direct current microgrid, specifically relates to a power pool-based dual-layer bus direct microgrid and a control method therefor, and solves the problems of high energy conversion loss and low system operating efficiency of the existing single-bus direct current microgrid, and high probability of power interference and poor system operating economy of the existing dual-bus direct current microgrid. The power pool-based dual-layer bus direct microgrid comprises an energy storage voltage regulation system, a direct current sub grid I and a direct current sub grid II, wherein the energy storage voltage regulation system comprises a power pool, a lithium battery pack, a DC / DC converter I, a DC / DC converter II and a DC / DC converter III; the power pool comprises a supercapacitor and a middle bus in parallel; the direct current sub grid I comprises a photovoltaic power generation unit I, a direct current load I and a direct current bus I; the direct current sub grid II comprises a photovoltaic power generation unit II, a direct current load II and a direct current bus II; and the direct current sub grid I and the direct current sub grid II have different voltage levels. The power pool-based dual-layer bus direct microgrid is applicable to a variety of fields.
Owner:TAIYUAN UNIV OF TECH
Power distribution system and method thereof
InactiveUS20100211807A1Shorten the timeEffective recoveryVolume/mass flow measurementHardware monitoringPower modeDistribution power system
A power distribution system is adapted to a management module connected to a plurality of servers, each of which is varied in power consumption in response to a power mode and performance thereof, via a power allocation request line and a power allocation response line. The management module records the upper-limit power setting, the power allocations, and the power pool with regard to the servers. The server records the power mode, the power allocation, the upper mode request threshold, and the redundant power which is calculated based on the difference between the power allocation and the actual power consumption. The management module recovers the redundant power from the server so as to update the power pool. Upon receiving a power allocation request, the management module distributes at least a part of the power pool to the server, thus allowing the server to shift the power mode to the upper mode.
Owner:NEC CORP
Supply interface unit for direct current power pooling
InactiveUS20050081069A1Alleviate power needsIncrease productionMechanical power/torque controlBatteries circuit arrangementsCurrent limitingOperation mode
The present invention provides for a supply interface unit for use in a DC power pooling system, the DC power pooling system comprising a plurality of DC electrical power consuming and providing entities, each of the DC electrical power consuming and providing entities having at least a first operative mode in which it may provide more electrical power than it consumes and a second operative mode in which it may consume more electrical power than it provides, and at least one pooling controller, the supply interface unit comprising: a first port and a second port; a controller; at least one controllable switch, operable by said controller to enable current flow from one of said first port to said second port and said second port to said first port; and at least one current limiter, operable by said controller to limit said current flow.
Owner:NEVERMORE SOLUTIONS
Power Supplies For Pool And Spa Equipment
Power supplies for pool and spa equipment are disclosed. In one embodiment, the power supply includes a buoyant housing, a peripheral float, at least one solar cell positioned on the buoyant housing for collecting sunlight and converting same to electrical energy, and a power cable for interconnecting the power supply and pool / spa equipment. In other embodiments, first and second inductive power couplings are provided for powering pool and spa equipment. The power couplings can also be installed using existing plumbing features of the pool or spa.
Owner:HAYWARD IND INC
Power supplies for pool and spa equipment
ActiveUS9502907B2Electric signal transmission systemsBatteries circuit arrangementsPower couplingPower cable
Power supplies for pool and spa equipment are disclosed. In one embodiment, the power supply includes a buoyant housing, a peripheral float, at least one solar cell positioned on the buoyant housing for collecting sunlight and converting same to electrical energy, and a power cable for interconnecting the power supply and pool / spa equipment. In other embodiments, first and second inductive power couplings are provided for powering pool and spa equipment. The power couplings can also be installed using existing plumbing features of the pool or spa.
Owner:HAYWARD IND INC
Centralized decision-making real time emergency control method for large electric network overloading
InactiveCN101299537ASolve centralized decision-makingSolutionData processing applicationsComputer controlTransformerPerformance index
A power pool overload centralized decision-making real-time emergency control method, includes: the host computer reads in the operational real-time data of the electric network from the energy management system and the control device through the communication interface; the host computer computes the optimized emergency control project based on the algorithm of the elimination line of the optional control measurement of the generator and the load and the loading combination performance index of the transformer; the host computer sends down the control project to the control device through the communication interface, and realize the control project through the function of the control device. The invention makes full use of the energy management system and the control device, from the overall situation of the electric network, solves the centralized decision-making and the real-time emergency control of the overloading of the power pool, which has correct and reliable judgement to the overload, fast action and the chain failure of the single node action in the traditional technology is not present.
Owner:JIANGSU ELECTRIC POWER CO
Reliability design method for large electric network safety steady cooperativeness defensive system
ActiveCN101299533AImprove reliabilityAvoid paralysisData processing applicationsComputer controlOnline and offlineOperation mode
A reliability design approach of the power pool safe stable coordination defense system includes a control framework with the site population and function division, wherein the control framework includes a dispatching center station, a control main station, a control sub-station and a control execution station, the control sub-station and the control execution station realize the regional control; and the control main station take charge of the coordination of each regional control; the dispatching center station take charge of the computation of the online control strategy and the online coordination control between the main control stations. The invention effectively solves the reliability problems of the coordination defense system caused by the device, the communication and the software and the like; the online control framework of 'site population and function division' avoids the paralysis of the whole system caused by the local device and the communication failure, advances the whole reliability of the coordination defense system; the computing device and the control device adopt the redundant configuration, which enhances the local reliability of the system; the coordination control system adopts the online and the off-line operation mode switching mechanism, which advances the operation reliability of the system.
Owner:NARI TECH CO LTD +1
DC backup source power supply guarantee and battery protection system
PendingCN106877460AExtended service lifeWith online maintenance and repair functionPower network operation systems integrationSafety/protection battery circuitsEngineeringProtection system
A DC backup source power supply guarantee and battery protection system of the invention belongs to the field of power pool. The system comprises a main control unit, a power supply unit, a charging unit, acquisition control units, a background operation system, and a remote transmission interface. The DC backup source power supply guarantee and battery protection system of the invention can disconnect a single battery which is about to be over-charged or over-discharged from a battery pack to implement effective protection. Power supply guarantee is emphasized. By increasing power sources (DC / DC), energy stored in the single batteries connected to the system can be all released, and the time of power supply can be extended. With the system used, the service life of the protected batteries can be increased, the batteries can be maintained and repaired online, and peak-shifting power utilization can be realized. The system can exit automatically under failure of a single battery. When the system fails, the original backup power supply function of the battery pack is not affected.
Owner:吉林龙璟科技有限公司
Solving method of takeoff performance of ground effect vehicle
ActiveCN105046048AAccurate acquisitionCalculation method is simpleSpecial data processing applicationsFlight vehicleModel test
The invention discloses a solving method of the takeoff performance of a ground effect vehicle. The takeoff performance comprises takeoff water-leaving speed, water-leaving time and water skiing distance. The method comprises the steps of carefully analyzing a relationship between hydrodynamic resistance / thrust / angle of trimming in full-aircraft powered pool model test data and speed, a relationship between the hydrodynamic resistance / thrust / angle of trimming and the center of gravity, and the relationship between the hydrodynamic resistance / thrust / angle of trimming and weight; finding feature points; carrying put segmentation fitting on the hydrodynamic resistance, the thrust and the angle of trimming to obtain the relational expressions of the hydrodynamic resistance, the thrust and the angle of trimming; obtaining the relational expression of the hydrodynamic resistance and the speed by combining with a CFD (Computational Fluid Dynamics) computation result or a wind tunnel test result; and quickly and effectively calculating the takeoff performance of the ground effect vehicle in different states according to an equation of motion of the ground effect vehicle. The invention provides a computation method suitable for the takeoff performance of the ground effect vehicle and provides a good condition for the total performance computation of the ground effect vehicle.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS
Optimizing downlink communications between a base station and a remote terminal by power sharing
InactiveUS20110128871A1Power managementFrequency-division multiplex detailsCommunications systemPower user
A method of optimizing downlink communications between a base station and mobile stations in a wireless communication system involves: identifying users that have a modulation control scheme (MCS) power value greater than a reference power value as high power users; for each of the high power users, calculating a power difference being a difference between a geometry value associated with each of the high power users and a reference geometry value associated with the reference power value respectively; summing the power differences in a power pool; identifying users that have an MCS power value below the reference power value as low power users; associating increased geometry values with at least some of the low power users while depleting the power pool by corresponding amounts until the power pool is depleted; and determining new MCSs for at least some of the low power users based on the increased geometry values.
Owner:APPLE INC
Combined regenerative energy power supply device
ActiveCN102931688AStrong regional adaptabilityReduce lossSingle network parallel feeding arrangementsWind energy generationPower gridLoad following power plant
The invention provides a combined regenerative energy power supply device which comprises a wind power generation unit, a photovoltaic power generation unit, a high-capacity energy storage element and a coordination control unit, wherein the high-capacity energy storage element is used for storing electric energy; the coordination control unit is used for enabling the wind power generation unit or the photovoltaic power generation unit to charge the high-capacity energy storage element when the electric quantity produced by the wind power generation unit and the photovoltaic power generation unit is higher than the demand of users in a region, and supplying power to an outside power pool system under the condition that the electric energy is surplus after the charging of the high-capacity energy storage element is finished; and the coordination control unit is also used for cutting off the wind power generation unit and the photovoltaic power generation unit and enabling the outside power pool system to charge the high-capacity energy storage element and supply power to loads of the users in the region when the electric quantity produced by the wind power generation unit and the photovoltaic power generation unit is lower than the demand of the users in the region. According to the invention, line loss and construction investment caused by remote locations of power generation places and long distances from loads can be effectively reduced.
Owner:POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
Arrangement method for energy storage unit in high wind power penetration power system
PendingCN110571795ASingle network parallel feeding arrangementsForecastingWind power penetrationElectricity market
The invention discloses an arrangement method for an energy storage unit in a high wind power penetration power system. The arrangement method establishes a market-based probability optimal power flow, and the power flow has energy storage integration and wind power generation. The method comprises the following steps of 1, conducting modeling according to wind power generation and load probability, 2, performing time shift on electric energy of the renewable energy by utilizing the energy storage system, 3, economic characteristics of compressed air storage, 4, establishing a power pool modelto bring a unilateral auction market into the optimal power flow, 5, using the probabilistic optimal power flow to consider uncertain factors such as wind power output and variable load in power flowcalculation, and 6, using a genetic algorithm for optimization and determining the optimal position of the energy storage unit in the unregulated wind power generation system based on the probabilityoptimal power flow of the power market.
Owner:JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD +3
Closed-loop self-adaption emergency control method for large electric network 'centralized coordination, layered control'
InactiveCN100576681CRealize closed-loop adaptive emergency controlSolving Transient Stability ProblemsData processing applicationsComputer controlPrimary stationClosed loop
A closed loop self-adapting emergency control method of power pool' centralized harmonization and hierarchy control' is disclosed, which adopts the quadrilayer structure of a dispatching center station, a control main station, a control sub-station and a control execution station from top to bottom, including the following control steps: 1. safely and stably controlling the system uploading operation data to the dispatching center station; 2. controlling the decision-making computation by the dispatching center station to obtain the online strategy table; 3. sending down the online strategy to the control main station by the dispatching center station and furthermore sending down to the related control sub-station by the control main station; 4.judging the failure and the overload according to the related failure and the overloading criterion by the control sub-station and the execution station; 5. transmitting the failure information to the upper control station layer by layer by the control sub-station and the execution station; 6. performing the failure combination match by the control main station; 7. sending the cutting machine and the cutting load command tot he corresponding control sub-station by the control main station; 8. reprocessing and transmitting to the execution station by the control sub-station; 9. cutting machine and cutting load exit by the execution station.
Owner:JIANGSU ELECTRIC POWER CO
Hand-held electric pool cleaner
A hand-held, electrically-powered pool cleaner includes a body and a nozzle for suctioning pool water. The body has a filter, an impeller and motor, rechargeable batteries, and a handle for carrying the body and for maneuvering the nozzle along a surface being cleaned the surface. The impeller draws pool water through the nozzle and the filter to remove debris water. A filter housing disposed between the nozzle and the body accumulates the filtered debris. The body optionally includes a pole attachment member to receive the free end of a pole for maneuvering the cleaner from outside of the pool.
Owner:WATERTECH
Charging topology network and direct current contactor control system and method in charging system
PendingCN113609682ATo achieve the purpose of power switchingGuaranteed uptimeBatteries circuit arrangementsDesign optimisation/simulationControl systemPower switching
The invention belongs to the technical field of power electronics, and discloses a charging topology network and a direct current contactor control system and method in a charging system. The charging topology network comprises a plurality of groups of power modules, a plurality of groups of direct current contactors and a plurality of groups of terminals. The plurality of groups of direct current contactors comprise a plurality of groups of first direct current contactors, a plurality of groups of second direct current contactors and a plurality of groups of main direct current contactors; the plurality of groups of power modules are composed of at least two groups of power modules; each group of power modules is connected with at least one group of first direct current contactors, and the multiple groups of first direct current contactors are connected in series to form an annular structure; each group of power modules is connected with a corresponding terminal through a group of main direct current contactors; and each group of power modules is electrically connected with the direct current contactors connected with any one group of non-adjacent power modules on the annular structure through one group of second direct current contactors. According to the invention, different contactors are attracted to form different channels which are connected with different power modules to form a power pool of the terminal, so that the purpose of power switching is achieved.
Owner:绿能慧充数字技术有限公司
Automatic recognition control method for large electric network catenation fault and hetero-position multi-point fault
ActiveCN101299535AEasy to controlAvoid being too lightData processing applicationsComputer controlPower gridPower pool
An automatic identification control method of the power pool chain failure and allopatry multipoint failure, including four steps: (1) building the mapping function of the forecast failure set and the failure element; (2) building a table Z with n*n elements and obtaining the values of each element; (3) building another table Q with n*n elements, wherein the initial value of the element is zero, when the element i goes out of order, the value of the element in i-rank row of table Q is the same with that in table Z, then looking up the presence of nonzero element in the i-th row of the table Q, namely the forecast failure of the failure set; (4) setting the value of the element in the i-th rank of table Q as zero after the element i goes out of order for the period T, namely the failure of the element i invalidates, so the failure generated afterwards is not combined with the failure. The invention has fast judging speed and high reliability.
Owner:NARI TECH CO LTD +1
Optimizing downlink communications between a base station and a remote terminal by power sharing
A method of optimizing downlink communications between a base station and mobile stations in a wireless communication system involves: identifying users that have a modulation control scheme (MCS) power value greater than a reference power value as high power users; for each of the high power users, calculating a power difference being a difference between a geometry value associated with each of the high power users and a reference geometry value associated with the reference power value respectively; summing the power differences in a power pool; identifying users that have an MCS power value below the reference power value as low power users; associating increased geometry values with at least some of the low power users while depleting the power pool by corresponding amounts until the power pool is depleted; and determining new MCSs for at least some of the low power users based on the increased geometry values.
Owner:APPLE INC
A double-layer bus DC microgrid based on power pool and its control method
ActiveCN106505552BIncrease flexibilityReduce conversion lossLoad balancing in dc networkDc source parallel operationMicrogridHigh energy
The invention relates to a direct current microgrid, specifically relates to a power pool-based dual-layer bus direct microgrid and a control method therefor, and solves the problems of high energy conversion loss and low system operating efficiency of the existing single-bus direct current microgrid, and high probability of power interference and poor system operating economy of the existing dual-bus direct current microgrid. The power pool-based dual-layer bus direct microgrid comprises an energy storage voltage regulation system, a direct current sub grid I and a direct current sub grid II, wherein the energy storage voltage regulation system comprises a power pool, a lithium battery pack, a DC / DC converter I, a DC / DC converter II and a DC / DC converter III; the power pool comprises a supercapacitor and a middle bus in parallel; the direct current sub grid I comprises a photovoltaic power generation unit I, a direct current load I and a direct current bus I; the direct current sub grid II comprises a photovoltaic power generation unit II, a direct current load II and a direct current bus II; and the direct current sub grid I and the direct current sub grid II have different voltage levels. The power pool-based dual-layer bus direct microgrid is applicable to a variety of fields.
Owner:TAIYUAN UNIV OF TECH
Optimizing downlink communications between a base station and a remote terminal by power sharing
A method of optimizing downlink for communications between a base station and mobile stations in a wireless communication system involves acquiring user identifiers and geometry values for mobile stations that are associated with registered users of the system, associating modulation control scheme (MCS) power values with respective users in response to respective geometry values, initializing a power pool, identifying users that have an MCS power value greater than a reference MCS power value as high power users and calculating a power difference for each of the high power users. The power difference is a difference between the geometry value associated with each of the high power users and a reference geometry value associated with the reference MCS power value respectively. The power differences associated with respective high power users are accumulated in the power pool, by summing the power differences. Users that have an MCS power value below the reference MCS power value are identified as low power users and increased geometry values are associated with at least some of the low power users while the power pool is reduced by corresponding amounts until the power pool is depleted. New MCSs are then determined for at least some of the low power users based on the increased geometry values and control information is transmitted to the low power users using modulation and control schemes identified by the corresponding new MCSs at power levels associated with the new MCSs.
Owner:APPLE INC
Centralized decision-making real time emergency control method for large electric network overloading
InactiveCN100541964CAccurate judgmentReliable judgmentData processing applicationsComputer controlElectric networkPerformance index
A power pool overload centralized decision-making real-time emergency control method, includes: the host computer reads in the operational real-time data of the electric network from the energy management system and the control device through the communication interface; the host computer computes the optimized emergency control project based on the algorithm of the elimination line of the optional control measurement of the generator and the load and the loading combination performance index of the transformer; the host computer sends down the control project to the control device through the communication interface, and realize the control project through the function of the control device. The invention makes full use of the energy management system and the control device, from the overall situation of the electric network, solves the centralized decision-making and the real-time emergency control of the overloading of the power pool, which has correct and reliable judgement to the overload, fast action and the chain failure of the single node action in the traditional technology is not present.
Owner:JIANGSU ELECTRIC POWER CO
Automatic recognition control method for large electric network catenation fault and hetero-position multi-point fault
ActiveCN101299535BImprove reliabilityData processing applicationsComputer controlElectric networkLookup table
An automatic identification control method of the power pool chain failure and allopatry multipoint failure, including four steps: (1) building the mapping function of the forecast failure set and the failure element; (2) building a table Z with n*n elements and obtaining the values of each element; (3) building another table Q with n*n elements, wherein the initial value of the element is zero, when the element i goes out of order, the value of the element in i-rank row of table Q is the same with that in table Z, then looking up the presence of nonzero element in the i-th row of the table Q, namely the forecast failure of the failure set; (4) setting the value of the element in the i-th rank of table Q as zero after the element i goes out of order for the period T, namely the failure ofthe element i invalidates, so the failure generated afterwards is not combined with the failure. The invention has fast judging speed and high reliability.
Owner:NARI TECH CO LTD +1
Combined regenerative energy power supply device
ActiveCN102931688BStrong regional adaptabilityReduce lossSingle network parallel feeding arrangementsWind energy generationPower gridEngineering
Owner:POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
Method for automatically recognizing power pool multi-area dynamic operation method
InactiveCN100576683CDynamic online identificationAccurate online identificationData processing applicationsEmergency protective circuit arrangementsRelationship - FatherSoftware design
The invention discloses an automatic recognizing method for the multi-region dynamic running mode of a large power network. The method comprises the following steps: the state variables of active components contained in a node can be fast and reliably transmitted to a father node A in a regional power network by dint of optical fiber communication and successor nodes B1, B2, ellipsis, Bm in the regional power network; the running mode Gamma of the current system is obtain by carrying out online uniform discrimination according to a state recognition function Gamma which is equal to f (Beta0, Beta1, Beta2, ellipsis, Betam) after the father node A is combined with the state variables of the active components thereof. The method completely avoids the previous improper method which only can automatically recognize the running mode of certain specific power network, and can online-recognize the runner mode parameters of the current large power network dynamically and precisely; the recognition time of the method is short, and the recognition can be automatically finished within a few milliseconds; when the structure of the power network changes, the software of the node in the power network is not required to be redesigned, thereby the method greatly saves the labor resources, the material resources and the financial resources, and improves the automation degree and the efficiency; besides, the reliability is also improved.
Owner:JIANGSU ELECTRIC POWER CO
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