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31results about How to "Does not affect the protection function" patented technology
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Orbit tightly sucking method and system of the protective maglev train
InactiveCN101134440AReasonable reliability and availabilitySuction protection is effectiveElectric propulsionMagnetPredictive controller
The present invention is anti-locking control method and system for magnetic suspension train, and on the basis of traditional magnetic suspension control device, one anti-locking control device comprising one predicting controller, one logic processing unit, one power tube state detector, etc is set. The predicting controller predicts the dynamic suspension gap on the running magnetic suspension train based on the signal from the displacement sensor of the suspension control device and sends command to the suspension control device according to the prediction result. Normally, the magnet current is real-time regulated for the magnet to keep certain suspension interval to the track; and in case predicted locking risk, the anti-locking control device requires the suspension control device to feed inverse current to the magnet so as to avoid locking the train onto the track.
Owner:NAT UNIV OF DEFENSE TECH
Method for automatically resetting grounding protection device of small-current system
ActiveCN101719660AAvoid the chance of phase-to-phase short circuitImprove power supply reliabilityEarth resistance measurementsEmergency protective arrangements for automatic disconnectionGrounding resistanceCurrent limiting reactor
The invention provides a method for automatically resetting the grounding protection device of a small-current system, which has the function of automatically resetting. The method comprises the following steps: an intelligent controller of a microcomputer judges whether the small-current system is grounded and further judges the grounding phase if the system is grounded; when the system is subjected to a grounding fault, a switching-on instruction is given to a fault-phase circuit breaker, and the fault-phase circuit breaker is rapidly switched on; the fault phase is connected with a grounding grid via a low-impedance current-limiting reactor provided with a secondary coil; then, a system grounding current flowing through the primary coil of the low-impedance current-limiting reactor is detected by a zero-sequence current transformer, and a high-frequency voltage signal generator connected with the secondary coil of the low-impedance current-limiting reactor is put into operation, so a high-frequency voltage and a high-frequency current are injected into the fault phase of the system; the high-frequency impedance of the fault phase of the system can be calculated by the intelligent controller of the microcomputer, so as to obtain the grounding resistance of the faulted return circuit; and the grounding resistance thereof is further compared with that in the normal system to judge whether the grounding fault disappears, if so, an automatic resetting instruction is given, so as to switch off the fault-phase circuit breaker, thereby automatically resetting the device.
Owner:JINZHOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
Electric leakage detection protector
InactiveCN101651325ASimple structureLow costEmergency protective arrangements for automatic disconnectionElectricityPhase lead
The invention provides an electric leakage detection protector, which comprises a first fault detection part and a circuit interruption part. The first fault detection part comprises a first current conduction part and a sampling control circuit, wherein on end of the first current conduction part is connected with a phase line while the other end is connected with a voltage sampling point on a ground wire so that a loaded electric connection is established between the phase line and the voltage sampling point; and one end of the sampling control circuit is connected with the voltage samplingpoint, and a control electric signal is generated when the voltage of the voltage sampling point exceeds a first scheduled threshold voltage. The circuit interruption part is used for interrupting theelectric connections on the phase line and a zero line under the control of the control electric signal. The electric leakage detection protector can detect whether the ground wire is connected normally and whether the phase line and the zero line are connected reversely, and the electric leakage detection protector can also comprise a residual current protective circuit to further detect the current unbalance on a live wire and the zero line.
Owner:SHANGHAI JIA AO ELECTRIC
Automatic opening and closing device of small circuit breaker
InactiveCN106158536ASimple structureWork reliablyProtective switch operating/release mechanismsEngineeringBevel gear
The invention relates to an automatic opening and closing device for a small circuit breaker, which includes a base, a cover, a transmission mechanism, a control circuit board installed on the base, and an action connecting rod. The transmission mechanism includes a transmission motor and a reduction gear set. The driving bevel gear arranged at the end of the reduction gear set of the transmission motor, the driven bevel gear meshed with the driving bevel gear, the opening and closing gear which is arranged on the upper part of the driven bevel gear and driven by the driven bevel gear, and the middle part of the opening and closing gear is set There is a transmission link, which passes through the installation base and is connected to the operating handle of the miniature circuit breaker to be controlled. An action lever is vertically arranged at the end of the action link, and the action lever reaches directly to the side of the assembled miniature circuit breaker. In the arc-shaped groove, the small circuit breaker cannot be closed manually when it is in the opening position. The invention has the advantages of simple structure and reliable operation, and is an ideal accessory for long-distance automatic opening and closing of the small circuit breaker.
Owner:BEIJING MINGRI ELECTRICAL EQUIP
Method for extracting explosion-continuous short circuit signal
ActiveCN103354344ASensitive highImprove reliabilityEmergency protective arrangement detailsEngineeringExtraction methods
Provided is a method for extracting an explosion-continuous short circuit signal. The method is characterized by utilizing the features of an instantaneous positive and negative pulse current which is produced at an explosion point during short circuiting, and thus extraction of the explosion point signal is realized; and combining a leakage protector to control short-circuit burning. Therefore, the short-circuit burning, which is caused for the reason that a short-circuit current is not large enough to enable an air short-circuit switch to trip, is performed an automatic circuit-breaking control, and electric fire cases can be reduced; the original leakage protector is combined, so that circuit control is simple and the cost is low; and thus the method is an ingeniously-designed, highly-practical anti-electric fire technical scheme.
Owner:苏州奕方华知识产权运营有限公司
Protective cover and isolation switch equipped with same
InactiveCN107039209ASimplifies the wiring processSimplify the steps of removing stitchesAir-break switch detailsElectricityEngineering
Owner:浙江金莱勒电气有限公司
Welding sealing method for preventing crevice corrosion from being generated between iron anode and copper alloy flange
ActiveCN105710509AReach design lifeDoes not affect solubilityArc welding apparatusWelding/cutting media/materialsCrevice corrosionFerric
A welding sealing method for preventing crevice corrosion from being generated between an iron anode and a copper alloy flange comprises the annular iron anode and the copper alloy flange, the peripheral surface of the annular iron anode is embedded into a center hole of the copper alloy flange in a matched mode, and the two ends of the annular iron anode and the two ends of the copper alloy flange are flush with each other. The welding sealing method is characterized in that the contact interfaces of the two ends of the annular iron anode and the copper alloy flange are subjected to welding sealing. The welding sealing method has the advantages that the contact faces between the iron anode and the cooper alloy flange are sealed and protected in a welding mode, the phenomenon of water seepage through the contact faces is avoided, the problem of crevice corrosion is solved thoroughly, it is ensured that the iron anode can reach the required and designed service life, and the dissolving property of the iron anode in seawater and the protection function and effect of the iron anode to a seawater pipeline are not affected in the protection validity period.
Owner:SUNRUI MARINE ENVIRONMENT ENG
Motor overvoltage protection circuit, undervoltage protection circuit, voltage protection circuit and motor
InactiveCN110416973ALow costSimple structureEmergency protective circuit arrangementsOvervoltageSimple circuit
The invention provides a motor overvoltage protection circuit, undervoltage protection circuit, voltage protection circuit and a motor. The motor overvoltage protection circuit comprises a first controllable switch of which the control end receives a bus voltage acquisition signal of the motor and the first end is grounded; and a second controllable switch of which the control end is connected with the second end of the first controllable switch, the first end is grounded and the second end is connected with the fault detection end of the driving chip of the motor. The overvoltage protection of the motor is realized by the motor overvoltage protection circuit. The motor overvoltage protection circuit has the characteristics of simple circuit structure, low cost and wide application range.The overvoltage protection is realized by utilizing the inherent protection function of the driving chip without occupying the existing working circuit port so that the requirements of the overvoltageprotection function on the chip resources can be reduced without influencing the existing protection function of the circuit.
Owner:GREE ELECTRIC APPLIANCES INC
Side position operation gear for beaker
InactiveCN103400727ADoes not affect trippingGuarantee the safety of electricity useContact driving mechanismsProtective switch operating/release mechanismsAutomatic controlCarrier signal
The invention discloses a side position operation gear for a beaker, which includes a casing, as well as a rotary body, a beaker rotary control shaft, and a rotary body driving mechanism, wherein the rotary body is arranged on the casing in a rotating manner; the rotary body driving mechanism is linked with the rotary body in a rotating and driving manner; the rotary body is in transmission fit with the breaker rotary control shaft through a clutch in a separation and union manner; the outer end of the breaker rotary control shaft penetrates through the casing from the side part of the casing. The side position operation gear has the advantages that under the premise that the normal tripping operation of the breaker is not influenced, the side position control of the breaker is realized, under the signal control of a prepayment carrier wave electric energy meter, the full automatic control of no-fee tripping and renewing switching is realized.
Owner:圣普电气有限公司
Method for automatically resetting grounding protection device of small-current system
ActiveCN101719660BAvoid the chance of phase-to-phase short circuitImprove power supply reliabilityEarth resistance measurementsEmergency protective arrangements for automatic disconnectionGrounding resistanceCurrent limiting reactor
The invention provides a method for automatically resetting the grounding protection device of a small-current system, which has the function of automatically resetting. The method comprises the following steps: an intelligent controller of a microcomputer judges whether the small-current system is grounded and further judges the grounding phase if the system is grounded; when the system is subjected to a grounding fault, a switching-on instruction is given to a fault-phase circuit breaker, and the fault-phase circuit breaker is rapidly switched on; the fault phase is connected with a grounding grid via a low-impedance current-limiting reactor provided with a secondary coil; then, a system grounding current flowing through the primary coil of the low-impedance current-limiting reactor is detected by a zero-sequence current transformer, and a high-frequency voltage signal generator connected with the secondary coil of the low-impedance current-limiting reactor is put into operation, soa high-frequency voltage and a high-frequency current are injected into the fault phase of the system; the high-frequency impedance of the fault phase of the system can be calculated by the intelligent controller of the microcomputer, so as to obtain the grounding resistance of the faulted return circuit; and the grounding resistance thereof is further compared with that in the normal system to judge whether the grounding fault disappears, if so, an automatic resetting instruction is given, so as to switch off the fault-phase circuit breaker, thereby automatically resetting the device.
Owner:JINZHOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
Local agent method of WEB firewall
The invention discloses a local agent method of a WEB firewall. First connection is established between a client side and an agent engine of the WEB firewall, second connection is established between the agent engine of the WEB firewall and a server, and the agent engine of the WEB firewall sends quadruple information connected for two times to a protocol stack of the WEB firewall; the protocol stack of the WEB firewall records a request data package which receives the first connection, the agent engine performs rule detection, and, when the request data package is a non-attack package, connection is established between the web engine and a server side, and data package sending is performed; and, after the protocol stack of the WEB firewall determines that the data package transmitted back by the server side is a response data package of the second connection, and the response data package is directly sent to the client side after the response data package is modification check. The local agent method can effectively improve great concurrent access lower agent engine performance, and effectively reduce a load of the gent engine.
Owner:西安交大捷普网络科技有限公司
Vehicle guard net device
InactiveCN106809164AFacilitate communicationLimited activity spacePedestrian/occupant safety arrangementEngineeringGlass sheet
Owner:HENAN POLYTECHNIC UNIV
Nose mask
PendingCN111558179AComfortable to wearImprove breathabilityFire rescueRespiratory apparatusNoseEnvironmental engineering
The invention discloses a nose mask, and relates to the field of hygienic products. The nose mask comprises a main body part, a filter assembly and a fixing assembly; the main body part is provided with first air-inlet-outlet openings which are matched with the nose, and further provided with a second air-inlet-outlet opening which is in communication with the first air-inlet-outlet openings; thefilter assembly is installed on the second air-inlet-outlet opening; and the fixing assembly is connected with the main body part and used for fixing the main body part to the face. The nose mask provided by the embodiment only covers the nose part, is comfortable to wear and has good air permeability; the material consumption is greatly reduced, the production cost is reduced, and the requirements of emergent large hygienic events on protective products can be met more easily; meanwhile, the pollution to the environment and the subsequent recycling and destroying cost are also reduced; in addition, due to the fact that the face is less shielded, the face recognition can normally play a role, the efficient management and control over crowded areas such as airports and stations are facilitated after an emergency hygiene event occurs, and social security stability is also facilitated to be kept.
Owner:SHUNJINGYUAN INTELLIGENT EQUIP TECH DEV SHENZHEN CO LTD
Wind turbine generator multimode adaptive control method and device, and computer storage medium
ActiveCN109669351ARealize multi-mode adaptive controlReduce lossesAdaptive controlRenewable energy source integrationElectricityData collecting
The invention discloses a wind turbine generator multimode adaptive control method and device, and a computer storage medium. The wind turbine generator multimode adaptive control method comprises thesteps: S1, a digital prototype model of a wind turbine generator is built; S2, operating state data of the controlled wind turbine generator are collected in real time; S3, the collected operating state data are input into the digital prototype model to be compared, whether the controlled wind turbine generator is in a normal operating state or not is judged, and if not, the step S4 is shifted tobe executed; and S4, the control mode is determined according to a comparing result to control the controlled wind turbine generator to be adjusted to be in the normal operating state. The wind turbine generator multimode adaptive control device comprises a prototype model building module, a data collecting module, a state judgment module and a multimode adaptive control module. Multimode adaptive control over the wind turbine generator can be achieved, operating reliable stability of the wind turbine generator is improved, and the advantages of simple realizing method, low cost, high controlefficiency and precision and the like are achieved.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Wind turbine multi-mode adaptive control method, device and computer storage medium
ActiveCN109669351BRealize multi-mode adaptive controlReduce lossesAdaptive controlRenewable energy source integrationControl engineeringData acquisition
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Curtain wall unit and curtain wall
The invention relates to a curtain wall unit and a curtain wall. The curtain wall unit comprises a unit body, a connecting device and an unmanned aerial vehicle detection countering device. The unit body comprises a panel and a mounting component which are connected with each other; the panel and the mounting component form an accommodating space; the panel is made from a material which can be penetrated by electromagnetic wave; the connecting device is fixedly connected with the mounting component; and the unmanned aerial vehicle detection countering device is arranged inside the accommodating space and is connected with the mounting component. The curtain wall unit and the curtain wall provided by the invention have the functions of a curtain wall and also have the functions of detectingand countering an unmanned aerial vehicle, so the functions of the curtain wall unit and the curtain wall are no longer simplex.
Owner:西安中易建科技集团有限公司
Damping type safety guardrail easy and convenient to disassemble and assemble
InactiveCN114293842AEasy to replaceDoes not affect the protection functionFencingVibration suppression adjustmentsArchitectural engineeringStructural engineering
The invention relates to the technical field of guardrails, in particular to a damping type safety guardrail easy and convenient to disassemble and assemble, which comprises a base and a guardrail body mounted on the base, the guardrail body comprises a guardrail right column, a frame and a guardrail left column, and the guardrail left column and the guardrail right column are mounted on the left side and the right side of the frame respectively. The guardrail is divided into the guardrail left column, the guardrail right column, the connecting block and the base which are detachably mounted, mounting and dismounting are easy and convenient, the guardrail damaged in the using process is also extremely convenient to replace, meanwhile, the protection function of the guardrail is not affected, and the stability of the guardrail can also be improved; meanwhile, second sliding grooves are formed in the sides, close to the frame, of the right guardrail column and the left guardrail column correspondingly, the left side and the right side of the frame are slidably installed in the two second sliding grooves correspondingly, the frame is connected with the second sliding grooves through buffer springs, and when the frame is stressed, the buffer springs deform and absorb collision force, so that damage caused by the frame to people and objects is reduced; and people and objects are protected.
Owner:江苏阔瑞新材料科技有限公司
Method and system for preventing magnet levitation train from adsorption for track
InactiveCN100497037CSuction protection is effectivePredicted Suspension ClearanceElectric propulsionLevitationReverse current
The present invention is anti-locking control method and system for magnetic suspension train, and on the basis of traditional magnetic suspension control device, one anti-locking control device comprising one predicting controller, one logic processing unit, one power tube state detector, etc is set. The predicting controller predicts the dynamic suspension gap on the running magnetic suspension train based on the signal from the displacement sensor of the suspension control device and sends command to the suspension control device according to the prediction result. Normally, the magnet current is real-time regulated for the magnet to keep certain suspension interval to the track; and in case predicted locking risk, the anti-locking control device requires the suspension control device to feed inverse current to the magnet so as to avoid locking the train onto the track.
Owner:NAT UNIV OF DEFENSE TECH
A method for extracting continuous explosion short-circuit signal
ActiveCN103354344BSensitive highImprove reliabilityEmergency protective arrangement detailsEngineeringElectrical current
Provided is a method for extracting an explosion-continuous short circuit signal. The method is characterized by utilizing the features of an instantaneous positive and negative pulse current which is produced at an explosion point during short circuiting, and thus extraction of the explosion point signal is realized; and combining a leakage protector to control short-circuit burning. Therefore, the short-circuit burning, which is caused for the reason that a short-circuit current is not large enough to enable an air short-circuit switch to trip, is performed an automatic circuit-breaking control, and electric fire cases can be reduced; the original leakage protector is combined, so that circuit control is simple and the cost is low; and thus the method is an ingeniously-designed, highly-practical anti-electric fire technical scheme.
Owner:苏州奕方华知识产权运营有限公司
Side position operation gear for beaker
InactiveCN103400727BDoes not affect operationDoes not affect the protection functionContact driving mechanismsProtective switch operating/release mechanismsAutomatic controlCarrier signal
The invention discloses a side position operation gear for a beaker, which includes a casing, as well as a rotary body, a beaker rotary control shaft, and a rotary body driving mechanism, wherein the rotary body is arranged on the casing in a rotating manner; the rotary body driving mechanism is linked with the rotary body in a rotating and driving manner; the rotary body is in transmission fit with the breaker rotary control shaft through a clutch in a separation and union manner; the outer end of the breaker rotary control shaft penetrates through the casing from the side part of the casing. The side position operation gear has the advantages that under the premise that the normal tripping operation of the breaker is not influenced, the side position control of the breaker is realized, under the signal control of a prepayment carrier wave electric energy meter, the full automatic control of no-fee tripping and renewing switching is realized.
Owner:圣普电气有限公司
Multi-mode control protection method and device for transmission chain of wind turbine generator
ActiveCN112983736AGuaranteed uptimeImprove operational safety and reliabilityWind motor controlMachines/enginesAutomatic controlMode control
The invention discloses a multi-mode control protection method and device for a transmission chain of a wind turbine generator. The method comprises the steps: S1, obtaining operation data of a target wind turbine generator, and recognizing the designated frequencies of the transmission chain according to the operation data, and taking the designated frequencies as key monitoring frequencies; and S2, controlling the target wind turbine generator to operate according to a plurality of preset control modes, monitoring the state of the transmission chain in the operation process of the target wind turbine generator, judging whether a specified operation index exceeds a normal range at the key monitoring frequency or not, and if yes, carrying out control to switch in the multiple preset control modes so as to adjust the corresponding operation index. The device comprises a frequency identification module and a multi-mode control module. The multi-mode control protection method and device have the advantages of being simple in implementation method, low in cost, capable of achieving multi-mode automatic control protection of the transmission chain of the wind turbine generator, high in protection control precision, good in protection performance, high in response speed and the like.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Cell phone back cover used for wireless power charging
InactiveCN106686175ADoes not affect the protection functionConvenient wireless chargingTelephone set constructionsInductive chargingElectrical and Electronics engineering
The invention discloses a cell phone back cover used for wireless power charging, which comprises a back cover main body. The back cover main body comprises a tempered glass layer and an ink layer that are laminated wherein the ink layer is located at the inner side of the tempered glass layer, the ink layer is provided with hollow patterns to enable the tempered glass layer to form wireless penetration windows, and the four corners at the inner side of the back cover main body are further provided with L-shaped corner protection gaskets. According to the invention, through the use of the composed structure of the tempered glass layer and the ink layer as the back cover of a cell phone, the protection function for the cell phone is not compromised on one hand, and due to the utilization of the high penetration performance of the tempered glass layer to make wireless power penetrate well for the convenient wireless power charging of the cell phone on the other hand. Then, the corner protection gaskets increase the anti-breakage performance of the back cover as well.
Owner:凯盛科技股份有限公司
Ceramic protective sleeve
InactiveCN107355816AReliable installationDoes not affect the protection functionElectric spark ignitersCeramicRound table
The invention discloses a ceramic protective sleeve. The ceramic protective sleeve comprises a ceramic sleeve cylinder and two plugs. The plugs are of round table structures made of rubber, a boring hole is formed in the inner end face of each plug, and ceramic cylinder bodies are embedded in the boring holes; the end faces, located at entrances of the boring holes, of the ceramic cylinder bodies are flush with the inner end faces of the plugs; stripe-like protrusions are arranged on the outer wall of the plugs, slope openings are formed in the two ends of the inner wall of the ceramic sleeve cylinder and are matched with the plugs, and the slope openings and the ceramic sleeve cylinder are of integral structures. According to the ceramic protective sleeve, a sticking mode is not required to be used, an ignition electrode is plugged into the ceramic protective sleeve, the two ends are plugged with the plugs, so that the ignition electrode is blocked and fixed by the inner end surfaces of the plugs, the periphery of the ignition electrode makes contact with an insulated and high-temperature resistant ceramic, so that rapid and reliable installation is realized, and protective function of the ceramic protective sleeve is not affected.
Owner:冠立科技扬州有限公司
Intelligent body protection device and protection method thereof
ActiveCN102420464BImprove accuracyIncrease speedCircuit arrangementsInformation technology support systemElectricityEmbedded system
The invention relates to an intelligent body protection device and a protection method thereof. Due to the adoption of the intelligent body protection device and the method thereof, the reliability and the rapidness of the tripping operation are improved. The intelligent body protection device comprises a CPU (central processing unit) and a relay. One path of non-electricity protection signal outputs a tripping signal TZ by utilizing the relay; the other path of non-electricity protection signal is sent to the CPU and the CPU sends a signal record XH; the CPU is also additionally provided with two paths of inputs; one path of input is a DGA (Dissolved Gas Analysis) control word determined by a user; the other path of input is DGA information; the DGA information comprises early warning information sent out by a DGA unit and information of various component gases dissolved in transformer oil; the DGA information is sent out by a GOOSE (Generic Object Oriented Substation Event) / MMS (Multimedia Messaging Service) form; after the DGA information is judged by the CPU, a tripping signal TZ1 and a signal record XH1 are output; and the tripping signals TZ and TZ1 are connected in parallel to a tripping circuit and are both used for realizing tripping of a transformer. In the scheme, DGA (Dissolved Gas Analysis) on-line monitoring information is introduced to improve the reliability and the rapidness of protection of a transformer body and the intelligent body protection device and the protection method thereof are convenient to analyze the condition of the body protection operation later.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
Method for interplanting glycyrrhiza under afforestation in protection forest
InactiveCN107624541AImprove the effect of ecological protectionImprove soil fertilityPlant cultivationCultivating equipmentsDiseaseVegetation
The invention provides a method for interplanting glycyrrhiza under afforestation in a protection forest. The method comprises the following steps: 1) digging planting holes: selecting the protectionforest with the canopy density which is not greater than 0.5 and digging the planting holes under the afforestation in the protection forest; 2) selecting seedlings: selecting glycyrrhiza germchits which have no diseases and insect pests, the seedling root length of 20cm to 35cm and the ground diameter of the seedlings of 0.4cm to 0.8cm; 3) planting: putting the glycyrrhiza germchits into the planting holes and backfilling and compacting by utilizing sandy soil. According to the method provided by the invention, the glycyrrhiza is interplanted under the afforestation in the protection forest and the coverage rate of vegetation under the afforestation is improved; the ecological protection function of the protection forest is enhanced.
Owner:ELION SHOUJIAN ECOLOGICAL TECH CO LTD
A wind turbine transmission chain multi-mode control protection method and device
ActiveCN112983736BGuaranteed uptimeImprove operational safety and reliabilityWind motor controlMachines/enginesAutomatic controlMode control
The invention discloses a method and device for multi-mode control and protection of a transmission chain of a wind turbine. The steps of the method include: S1. Acquiring the operation data of a target wind turbine, and identifying each designated frequency of the transmission chain according to the operation data as a key monitoring frequency; S2 .Control the operation of the target wind turbine according to multiple preset control modes, and monitor the state of the transmission chain during the operation of the target wind turbine, and judge whether the specified operation index exceeds the normal range at the key monitoring frequency. If it is controlled within multiple presets The control mode is switched to adjust the corresponding operation index; the device includes a frequency identification module and a multi-mode control module. The invention has the advantages of simple implementation method, low cost, multi-mode automatic control and protection of the transmission chain of the wind power generating set, high protection control precision, good protection performance, fast response speed and the like.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
High-precision sampling method of low-voltage circuit breaker
PendingCN114779065ADoes not affect the protection functionCurrent/voltage measurementElectrical measurement instrument detailsPhase currentsTransformer
The invention provides a high-precision sampling method for a low-voltage circuit breaker, and the method comprises the following steps: S1, carrying out the voltage reduction of a three-phase voltage signal inputted by the circuit breaker through a resistor voltage dividing mode, and transmitting the signal to a metering chip; s2, converting the three-phase current signal through a special metering transformer, and transmitting the converted three-phase current signal to a metering chip through a filter circuit; s3, the metering chip carries out internal calculation according to the collected three-phase voltage and current signals to obtain original data; according to the invention, high-precision power grid parameter measurement can be completed on the premise that the protection function is not affected.
Owner:福建鑫博亿电力科技有限公司
Integrated control system of piston variable pump
ActiveCN110848111APrevent pressure dropImprove the safety of usePump testingPositive displacement pump componentsPhysicsPlunger pump
The invention discloses an integrated control system of a piston variable pump, which is combined with the piston variable pump. The piston variable pump comprises an oblique plate, wherein the oblique plate is installed in the piston variable pump, and the displacement of the piston variable pump is determined according to the oblique angle of the oblique plate. The integrated control system of the piston variable pump comprises a big connecting rod, a small connecting rod, a lower variable cylinder, an upper variable cylinder, an integrated control assembly and a control oil way, wherein thebig connecting rod and the small connecting rod are respectively connected to both ends of the oblique plate, the big connecting rod is used as a piston of the lower variable cylinder and is connected with the lower variable cylinder, and the small connecting rod is used as a piston of the upper variable cylinder and is connected with the upper variable cylinder; high-pressure oil of an oil outlet or control oil of an external control port of the piston pump are usually introduced to the upper variable cylinder; the integrated control assembly is connected with the oil outlet of the piston pump by virtue of an oil way, and the integrated control assembly is connected with the small connecting rod; and the lower variable cylinder is connected with the integrated control assembly by virtueof the control oil way.
Owner:LIYUAN HYDRAULIC (SUZHOU) CO LTD
A method and device for diagnosing dislocation of wind turbine blade installation
ActiveCN112983750BRealize automatic diagnosisGuaranteed accuracyMachines/enginesWind motor monitoringTurbine bladeClassical mechanics
The invention discloses a method and device for diagnosing dislocation of blades of a wind turbine. The steps of the method include: S1. Acquire acceleration data of a target wind turbine running within a specified period of time, perform statistics on the acquired acceleration data, and preliminarily determine whether or not according to the statistical results. A dislocation fault may occur, if it is, go to step S2; S2. Obtain the operating parameters of the wind turbine including the acceleration data within the specified time period for frequency domain analysis, and finally confirm whether the target wind turbine has a dislocation fault according to the result of the frequency domain analysis; the device Including the dislocation initial judgment module and the dislocation confirmation module. The invention has the advantages of simple implementation method, low cost, automatic diagnosis of blade installation dislocation, and high diagnosis accuracy and efficiency.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Intelligent body protection device and protection method thereof
ActiveCN102420464AImprove speedIncrease flexibilityCircuit arrangementsInformation technology support systemEmbedded systemMultimedia Messaging Service
The invention relates to an intelligent body protection device and a protection method thereof. Due to the adoption of the intelligent body protection device and the method thereof, the reliability and the rapidness of the tripping operation are improved. The intelligent body protection device comprises a CPU (central processing unit) and a relay. One path of non-electricity protection signal outputs a tripping signal TZ by utilizing the relay; the other path of non-electricity protection signal is sent to the CPU and the CPU sends a signal record XH; the CPU is also additionally provided with two paths of inputs; one path of input is a DGA (Dissolved Gas Analysis) control word determined by a user; the other path of input is DGA information; the DGA information comprises early warning information sent out by a DGA unit and information of various component gases dissolved in transformer oil; the DGA information is sent out by a GOOSE (Generic Object Oriented Substation Event) / MMS (Multimedia Messaging Service) form; after the DGA information is judged by the CPU, a tripping signal TZ1 and a signal record XH1 are output; and the tripping signals TZ and TZ1 are connected in parallel to a tripping circuit and are both used for realizing tripping of a transformer. In the scheme, DGA (Dissolved Gas Analysis) on-line monitoring information is introduced to improve the reliability and the rapidness of protection of a transformer body and the intelligent body protection device and the protection method thereof are convenient to analyze the condition of the body protection operation later.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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