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42results about How to "Ensure safe power supply" patented technology
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Medium-voltage fire-proof cable
ActiveCN101169993AGood tensile strengthGood fire and heat insulation performanceInsulated cablesInsulated conductorsThermal insulationCable transmission
The invention relates to a medium-voltage power transmission fire-resistant cable, which is characterized in that the outer fire-resistant layer of the medium-voltage cable core is made of fire-resistant inorganic fiber heat insulation layer on the inner side, and the outer side is a soft thermosetting elastomer for normal use. The composite fire-resistant and heat-insulating layer of the heat layer, the thermosetting elastomer, is composed of 30-50wt% silicon-based elastic material, 40-60wt% inorganic filler, 5-15wt% medium and low temperature frit, 4-10wt% vulcanizing agent, It is made by mixing extrusion molding and vulcanization. The composite fire-resistant and heat-insulating layer is a relatively soft sheath material when it is not exposed to flames, which can ensure good bending performance of the refractory structure in normal conditions, and quickly transforms into a shell-and-tube refractory and heat-insulating structure when it encounters fire or high temperature. In the fire-fighting environment, it can still maintain a certain period of time without being damaged, effectively preventing damage to the inner insulation caused by flames or high temperatures. When the flame temperature of the outer layer is 850°C, the temperature of the inner insulation surface is lower than 180°C. This fire-resistant and heat-insulating structure can be applied according to conventional cable production methods, and the production efficiency is extremely high.
Owner:FAR EAST CABLE +2
Finished automobile intelligent controller of journey increasing type electromobile
InactiveCN102929167AClear structureSave resourcesProgramme control in sequence/logic controllersArea networkControl theory
The invention discloses a finished automobile intelligent controller of a journey increasing type electromobile. The controller comprises a microprocessor, a power supply module, an on-off quantity input module, a voltage simulation quantity input module, a pulse quantity input module, a BDM (Background Debugging Mode) debugging interface, an on-off quantity output module, a simulation quantity output module, a PWM (Pulse-Width Modulation) output module, a CAN (Controller Area Network) communication module and an IIC (Inter-Integrated Circuit) communication module. Due to the arrangement of the design such as contrary connection prevention for the power supply model, and the processing of the on-off quantity input module and the on-off quantity output module, safe and stable work of the power supply module is ensured; due to the processing on the input / output of the on-off quantity, input / output signals are converted from parallel signals into serial signals, so that the hardware resource such as the microprocessor is saved, and the control efficiency is improved.
Owner:HUNAN UNIV
Wind driven generator fault detecting system and method based on Android platform
InactiveCN106593781AReduce maintenance costsExtended service lifeEngine fuctionsMachines/enginesWind drivenOperating system
The invention relates to a wind driven generator fault detecting system based on an Android platform. The system comprises the Android platform; a fault detecting system is built on the Android platform, and includes four parts of an audio acquiring module, an audio preprocessing module, an audio comparing module and a fault judging module; a microphone is arranged in the audio acquiring module; the audio acquiring module is connected with the audio preprocessing module; the audio preprocessing module is connected with the audio comparing module; and the audio comparing module is connected with the fault judging module.
Owner:SHANGHAI DIANJI UNIV
Live replacement method for static contact of 220 kV flexible busbar
ActiveCN102664358AMeet the requirements of the equipotential operation lawReduce volumeSwitchgearSocial benefitsBusbar
The invention relates to the field of GW6 series alternating high-voltage isolating switches of a flexible busbar in a power grid 220 kV substation and particularly relates to a live replacement method for a static contact of the 220 kV flexible busbar. The live replacement method for the static contact of the 220 kV flexible busbar is characterized in that operation persons ascend to the position below the flexible busbar along an insulation herringbone ladder and subject the static contact of the flexible busbar to live replacement by means of using an idiostatic method to transfer potentials, and the live replacement method includes a detachment step and an installation step. Compared with replacement methods in prior art, the live replacement method for the static contact of the 220 kV flexible busbar has the advantages that the insulation herringbone ladder is used as an insulation manned platform and meets the requirement of an equipotential operation method, and the insulation herringbone ladder is small in size, can be lifted below the flexible busbar, and is applicable to live replacement operation for static contacts of GW6 series sing-column and double-column vertical opening type isolating switches of the 220 kV flexible busbar; the live replacement method is capable of promoting scientific and technological progress and has obvious social benefits and economical benefits; and the live replacement method fills the gap in the live replacement projects of the static contacts of the isolating switches and has a broad application prospect and a popularization value in national grid systems.
Owner:ANSHAN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER COMPANY +1
Medium-voltage fire-proof cable
ActiveCN101169993BReduce the burden onImprove fire and heat insulation performanceInsulated cablesInsulated conductorsFiberFrit
Owner:FAR EAST CABLE +2
Arc extinguishing control device for contact net
ActiveCN101604841AAvoid overlappingEnsure safetyEmergency protective arrangements for limiting excess voltage/currentOvervoltageEngineering
The invention relates to a power supply device, in particular to an arc extinguishing control device for a contact net, which is mainly used for a railway contact net, and is used for eliminating the fault phenomenon of the contact net such as arc discharge, trip, burn and the like. The arc extinguishing control device consists of an arc extinguishing main controller MCU, an overvoltage absorber MDA and a permanent-magnetic controlled arc extinguishing switch, wherein the overvoltage absorber MDA and the permanent-magnetic controlled arc extinguishing switch are connected in parallel, and the arc extinguishing main controller MCU is connected with the permanent-magnetic controlled arc extinguishing switch. The arc extinguishing control device has the advantages that the device with the arc extinguishing capacity assists the arc discharge phenomenon between an electric arc and the contact net; electric appliances with the arc extinguishing capacity are arranged to inhibit the electric arc during the running so as to shorten the arcing time and arcing strength; and the device radically avoids trip accidents of the power supply and burn accidents for the electric appliances.
Owner:深圳金奇辉电气有限公司
Wearable energy self-supply safety monitoring alarm system
InactiveCN106327795AIncrease continuous working timeHigh power supply reliabilityBatteries circuit arrangementsBraceletsElectric energyVoltage
The invention relates to a wearable energy self-supply safety monitoring alarm system, comprising an execution module and an energy self-supply power source, wherein the energy self-supply supplies electric power for the execution module.The system can timely monitor the environment status where the miners locate, can give an alarm in case of danger, and the structure is small, easy to carry, and is carried in the form of wearable bracelet; the power is supplied by the human vital signs, no need of replacing battery or frequent charging; safe and reliable, the highest output voltage thereof is 5.5V, and the heat effect produced in work is insufficient to light inflammable gas by the method of circuit energy limiting; simple operation, when a certain parameter among various environment parameters exceeds threshold value, the alarm will be triggered automatically, to remind the miners to stay away from the hazardous area.
Owner:NANHUA UNIV
Suspension type movable branch cutting device
ActiveCN103891535AEnsure safe power supplyImprove work efficiencyCuttersCutting implementsAutomatic controlSprocket
The invention belongs to power industry power transmission and transformation safety guaranteeing construction equipment and particularly relates to a suspension type movable branch cutting device. A motor (13) is mounted on the lower portion inside a trapezoid outer shield (15). The upper end extension shaft of the motor (13) is connected with a worm wheel and worm type reducer (12). A drive sprocket (11) is mounted on the extension shaft of the reducer (12). A support (10) is fixed on the upper portion outside the outer shield (15). A driven sprocket (8) is mounted on a driven sprocket shaft (7) in the support (10). The driven sprocket (8) is in transmission connection with the drive sprocket (11). Two reset springs (5) are fixedly mounted on the driven sprocket shaft (7) on the outer side of a lower roller (6). The reset springs (5) are respectively movably connected to two upper roller shafts (2). A first chain saw sprocket (20) and a second chain saw sprocket (18) are mounted on the lower end extension shaft of the motor (13). A chain saw (16) is mounted on each of the first chain saw sprocket (20) and the second chain saw sprocket (18). The suspension type movable branch cutting device automatically controls the motor to move so as to cut the branches, causing potential safety hazard, below electric wires, and safe circuit power supply can be guaranteed.
Owner:STATE GRID CORP OF CHINA +1
Double-power switch control device
InactiveCN104201768AHigh speedReliable switchingEmergency power supply arrangementsContinuous/uninterruptedPower switching
The invention discloses a double-power switch control device which comprises a control unit and an execution unit, wherein the control unit comprises a DSP (digital signal processor), a control loop A and a control loop B; the control loop A is used for detecting voltage, frequency and phase position of a frequently-used power supply in real time and sending real-time signals to the DSP; after the real-time signals are judged by the DSP, corresponding operating orders are sent to the execution unit to control the switch-on and switch-off of the frequently-used power supply; the control loop B is connected with the DSP so as to control the switch-on and switch-off of a stand-by power supply; the frequently-used power supply and the stand-by power supply are in interlocking relation, namely, one of the power supplies is switched on, while the other is automatically switched off. According to the invention, the characteristics of high speed, high precision and powerful functions of the DSP are utilized, the stable, reliable and quick switch of the double-power switch is realized and the continuous, uninterrupted safe power supply is ensured; as the switch is switched manually, the control is diversified.
Owner:蒙毅嘉
Multidirectional distance dynamic monitoring and early warning method based on edge calculation
InactiveCN112291303ATimely detection of hidden troublesGuaranteed safe operationCircuit arrangementsTransmissionDynamic monitoringSafe operation
The invention relates to a multidirectional distance dynamic monitoring and early warning method based on edge calculation. The method comprises the following steps: a dynamic monitoring sensor sendsacquired initial information of a power transmission line to edge calculation equipment; the edge calculation equipment stores the initial information collected by the dynamic monitoring sensor as initial information; the dynamic monitoring sensor dynamically collects power transmission line information in real time according to a set monitoring period; the edge calculation equipment compares andjudges the real-time dynamic information with stored initial information, and transmits the real-time dynamic information to an alarm system when deviation is greater than a set threshold value; and if the data which cannot be judged exists, the data is uploaded to a cloud server. According to the invention, on-line dynamic monitoring of the power transmission line is realized, fault hidden troubles of the power transmission line can be discovered and processed in time, safe operation of the power transmission line is effectively guaranteed, power supply accidents are prevented, and safe powersupply is guaranteed.
Owner:CHANGCHUN INST OF TECH
A fast separation method for botdr temperature and strain in smart grid icing monitoring
ActiveCN107014519BHigh densityLong-term stabilityThermometers using physical/chemical changesFiberSmart grid
The invention discloses a Brillouin Optical Time Domain Reflectometry (BOTDR) temperature and strain rapid separation method in the icing monitoring of a smart grid. The optical fiber composite overhead ground wire (OPGW) cable in the power grid is used for sensing and monitoring to obtain Brillouin Abyss scattering spectrum. Select points within 3dB of the maximum value of the Brillouin scattering spectrum along the fiber path to perform quadratic polynomial fitting based on the least squares method. After fitting, the polynomial equation is obtained. After calculating the peak power and center frequency according to the polynomial coefficients, the obtained Power and frequency shift curves. According to the frequency shift curve and power curve, select the fiber splicing point, and recalibrate the temperature coefficient and gauge coefficient of Brillouin power. After the coefficient is corrected, the temperature and strain can be accurately separated.
Owner:NANJING UNIV
Artificial intelligence interaction platform based on computer science
InactiveCN112436605AAvoid accidentsWith automatic induction fire extinguishingCurrent/voltage measurementDispersed particle separationTransformerEngineering
An artificial intelligence interaction platform based on computer science comprises a five-prevention host, a monitoring host, a voltage monitor, a current monitor, an infrared thermometer, a temperature sensing self-starting fire extinguisher, an arc detector, an arc light protection device, an infrared sensor, a mobile phone, a cloud server and a transformer substation intelligent control terminal, wherein the five-prevention host and the monitoring host are respectively connected with the transformer substation intelligent control terminal; the five-prevention host is connected with the monitoring host; the voltage monitor, the current monitor, the infrared thermometer and the arc detector are respectively connected with the transformer substation intelligent control terminal; and the arc light protection device, the infrared sensor and the substation intelligent control terminal are respectively connected with the monitoring host. The artificial intelligence interaction platform can automatically sense or monitor voltage or current on a line of a transformer substation, adjust the voltage and the current in time, prevent accidents caused by the fact that the voltage or the current is too large, and has an automatic induction fire extinguishing function.
Owner:STATE GRID SHANDONG ELECTRIC POWER
An overvoltage damping device of interstice
InactiveCN101217235AGood arcing effectLarge flow capacityEmergency protective arrangements for limiting excess voltage/currentOvervoltageEngineering
The invention relates to a clearance overvoltage damping device, including an insulation cylinder, the interior of which is fixedly provided with a non-inductance resistor and a gas discharge tube, the non-inductance resistor is connected with the gas discharge tube in series, and terminal blocks are arranged on the insulation cylinder. The overvoltage which is caused by the transition process when throwing and cutting a capacitor group can be inhibited effectively, the invention can prevent the occurrence of the accidents of a capacitor, a discharge coil, a circuit breaker and other equipments, ensures the safe power supply and has obvious damping effect for the transition process which is caused by switching-on and re-ignition, the protection capability is strong and the service life is long.
Owner:凌海科诚电气有限责任公司
High-voltage switch cabinet monitoring system based on Internet
PendingCN114865796AReal-time monitoringEnsure electricity safetyCurrent/voltage measurementCircuit arrangementsPower qualityThe Internet
The invention belongs to the technical field of the Internet of Things, and particularly relates to an Internet-based high-voltage switch cabinet monitoring system, which comprises an MCU module, the input end of the MCU module is electrically connected with a power supply circuit module, the input end of the MCU module is electrically connected with an electric energy quality acquisition module, the MCU module is electrically connected with a communication module, and the communication module is electrically connected with a wireless communication module. The MCU module is electrically connected with a five-prevention locking detection module, the MCU module is electrically connected with a human body infrared induction detection module, the MCU module is electrically connected with a temperature and humidity detection module, and the MCU module is further electrically connected with an Internet of Things remote monitoring and inspection module. According to the invention, real-time monitoring of temperature and humidity, electric quantity and electric energy quality in the high-voltage switch cabinet, a five-prevention locking operation state and whether people approach around the switch cabinet can be realized.
Owner:江苏中房电力安装工程有限公司
Application method of direct current (DC) monitoring device
The invention discloses an application method of a direct current (DC) monitoring device, which is realized by the following steps: (1) switching over all DC loads to a temporary switch-over screen, putting all loads of a station on a temporary charging device and a temporary accumulator cell group, wherein, in an original DC screen, except that a connecting terminal is electrified, other devicesare all out of running; (2) dismantling original monitoring equipment, an original insulated locator and an original insulation current mutual conductor on a feeder circuit, and dismantling all connecting wires among screens and the connecting wires of a control loop; (3) installing a new monitoring equipment, a new insulated locator and connecting wires of the two; (4) replacing a main fuse of accumulator cells into a DC air circuit breaker; replacing a main switch and section switches controlled by the main switch to enable the main switch and the section switches to meet range requirement; (5) testing and debugging all functions of the DC monitoring device ; and (6) uploading DC information, and accessing a background computer and telecontrol equipment. The invention has the advantages that: (1) the monitoring device has an independent circuit board which can be plugged in and out electrically, thereby being more convenient to overhaul; (2) the monitoring device has high accuracy, can alarm accurately and can control the even and float charging procedure of accumulator cells more accurately.
Owner:BAOJI POWER SUPPLY BUREAU +1
Arc extinguishing control device for contact net
ActiveCN101604841BPrevent power trip accidentsEnsure safe power supplyEmergency protective arrangements for limiting excess voltage/currentOvervoltageEngineering
Owner:深圳金奇辉电气有限公司
Method for reducing over-high ambient temperature of transformer room
InactiveCN112382961AGuaranteed uptimeControl overheating problemsBoards/switchyards circuit arrangementsAC motor controlThermodynamicsProcess engineering
The invention relates to a method for solving the problem that the environment temperature of a transformer room is too high, in particular to a method for reducing the environment temperature of thetransformer room. The method comprises the steps: calculating a low-voltage side secondary current value when the load rate is 60% according to the capacity of a dry-type transformer installed in a 10kV room, setting a corresponding action current value through a dial switch of an intelligent current relay, and when the intelligent current relay collects the current of a dry-type transformer low-voltage side current transformer to meet the action current, enabling the intelligent current relay to output a passive contact, and connecting the normally open passive contact of the intelligent current relay to a starting loop of the on-site axial flow fan, thereby achieving the forced ventilation and heat dissipation of the transformer room, and solving a problem that the temperature rise of the dry-type transformer is too high during the heavy-load operation in summer. According to the invention, the temperature rise problem of the dry-type transformer installed indoors during high-load and high-temperature operation can be well solved.
Owner:THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
An online intelligent monitoring method of transmission line status in smart grid based on big data analysis
ActiveCN113051423BAvoid hysteresisImprove accuracyData processing applicationsImage analysisPower gridComputer science
The invention discloses an online intelligent monitoring method for the status of transmission lines in a smart grid based on big data analysis. By dividing the transmission lines in the distribution network into sections of transmission lines, the insulation surface of each section of transmission lines in the distribution network is collected. Image, obtain the damaged area of the insulation skin in the insulation surface image of each section of the transmission line in the distribution network, calculate the actual damaged area of the insulation surface of each section of the transmission line in the distribution network, and obtain the transmission line of each section in the distribution network. The number of broken wires in the electronic circuit, and measure the height of the line at the center point of each section of the transmission line in the distribution network, compare and analyze the line height difference at the center point of each section of the transmission line in the distribution network, and calculate the distribution network. The comprehensive safety impact coefficient of each section of the transmission line in the power grid analyzes whether each section of the transmission line is in a dangerous stage, and repairs or replaces each section of the transmission line in the dangerous stage, so as to ensure the safe power supply of the distribution network.
Owner:曲靖曲电电力投资有限公司
A pole anti-collision device
ActiveCN111501627BEnsure safe power supplyTowersRoadway safety arrangementsEngineeringStructural engineering
The invention discloses an anti-collision device for an electric pole, comprising: a force transmission cylinder, an outer side wall of which is provided with an annular fixing position, and an inner side wall is provided with an upper hinge position and a lower hinge position which are distributed along the circumferential direction and correspond one-to-one ; a gripping assembly, which includes each upper link group with one end hinged in each upper hinge position, and each lower link group with one end hinged in each lower hinge position; the other end of each upper link group is hinged with an upper grip The other end of each lower link group is hinged with a lower holding block; the upper holding block and the lower holding block are in one-to-one correspondence, and each upper holding block and the corresponding lower holding block are also connected with a A tensioning member, which can be pressed on the outer side wall of the electric pole by the tensioning of the tensioning member; layer and a buffer layer disposed on the outer layer of the support layer. The present invention can very effectively play the functions of impact force buffering and rotation unloading force.
Owner:GUIZHOU POWER GRID CO LTD
Split conductor subspan oscillation suppression device
PendingCN111697519ASimple structureEasy to installDevices for damping mechanical oscillationsFluid dynamicsEngineeringPhysics
The invention provides a split conductor subspan oscillation suppression device. The split conductor subspan oscillation suppression device comprises at least two sleeves (1), wherein each sleeve (1)is of a hollow cylinder structure, and a plurality of strip-shaped holes (2) are formed in the side wall of each hollow cylinder; the at least two sleeves (1) are arranged on different split conductors side by side; the air flow passes through the strip-shaped holes (2) of the plurality of sleeves (1), then the wake flow field of the conductor is changed, the original excitation condition of subspan oscillation of the conductor is changed at the same time, and subspan oscillation of the split conductor is restrained or weakened. The structure is simple, the installation is convenient and fast,and safe power supply is guaranteed.
Owner:CHINA ELECTRIC POWER RES INST +1
Method for fixing electric pole ends without releasing partial prestress
The invention provides a method for fixing electric pole ends without releasing partial prestress. The method includes steps of prefabricating a concrete pole body, installing the corrosion-resistant electric pole ends and fixedly installing low-relaxation helical rib steel wires; enabling the aperture of the upper end of the concrete pole body to be smaller than that of the lower end of the concrete pole body; installing the corrosion-resistant electric pole ends at the upper end and the lower end of the concrete pole body; fixing the corrosion-resistant electric pole ends to the concrete pole body by the aid of the low-relaxation helical rib steel wires to guarantee that an effect of the prestress can be effectively realized. The method has the advantages that the corrosion-resistant electric pole ends are connected onto the concrete pole body by the low-relaxation helical rib steel wires, so that the effect of the prestress of an electric pole can be effectively realized, operation is simple, the method is easy to implement and popularize, and the technological cost is low; T-shaped low-relaxation helical rib steel wire through holes are formed in joints of the low-relaxation helical rib steel wires and the corrosion-resistant electric pole ends, so that the low-relaxation helical rib steel wires can be prevented from falling off, the service life of a product can be prolonged, and safe power supply can be guaranteed.
Owner:六安明诚水泥制品有限责任公司
Electric pole anti-collision device
ActiveCN111501627AEnsure safe power supplyTowersRoadway safety arrangementsStructural engineeringMechanical engineering
The invention discloses an electric pole anti-collision device which comprises a force transmission cylinder, an annular fixing position is arranged on the outer side wall of the force transmission cylinder, and an upper hinge position and a lower hinge position which are distributed in the circumferential direction and correspond to each other in a one-to-one mode are arranged on the inner side wall of the force transmission cylinder; an enclasping assembly which comprises upper connecting rod sets and lower connecting rod sets, one ends of the upper connecting rod sets are hinged into the upper hinge positions, and one ends of the lower connecting rod sets are hinged into the lower hinge positions; the other end of each upper connecting rod group is hinged with an upper enclasping block,and the other end of each lower connecting rod group is hinged with a lower enclasping block; the upper enclasping blocks and the lower enclasping blocks are in one-to-one correspondence, a tensioning piece is further connected between each upper enclasping block and the corresponding lower enclasping block, and the upper enclasping blocks and the lower enclasping blocks can be pressed on the outer side wall of the electric pole through stretching of the tensioning pieces; and a force unloading cylinder which is located on the periphery of the force transmission cylinder and comprises a supporting layer connected to the annular fixing position and a buffer layer arranged on the outer layer of the supporting layer. According to the invention, the effects of impact force buffering and rotating force unloading can be very effectively achieved.
Owner:GUIZHOU POWER GRID CO LTD
Surface treatment process for aluminum base material conductor bus way
InactiveCN105088286ALow costSolve the surface oxidation resistanceSolid state diffusion coatingCopper conductorElectrical resistance and conductance
The invention relates to a surface treatment process for an aluminum base material conductor bus way. The surface treatment process includes the steps of primary workpiece surface treatment, molecular osmotic treatment, plating and secondary workpiece surface treatment. By means of the surface treatment process for the aluminum base material conductor bus way, the surface oxidation resistance of an aluminum material is achieved, the surface conductivity is improved, and the contact resistance is lowered. The novel aluminum alloy bus way serves as a conductor, and on the premise of guaranteeing safe power supply, the cost of the bus way is greatly reduced. Compared with a copper conductor bus way with the same current-carrying capacity, the cost of the aluminum material bus way is only 30-35% that of the copper conductor product, so that the aluminum base material conductor bus way is economical.
Owner:NINGBO GELAITE ELECTRICITY VAPOR CREATES
Power transmission line foreign matter cleaning device
ActiveCN113809685AGuaranteed stabilityImprove cleaning efficiencyApparatus for overhead lines/cablesForeign matterPower transmission
The invention discloses a power transmission line foreign matter cleaning device which comprises a walking mechanism A and a walking mechanism B. The walking mechanism A and the walking mechanism B are installed on two adjacent power transmission lines respectively and synchronously driven to walk along the power transmission lines, and each of the walking mechanism A and the walking mechanism B comprises a semi-ring pipe A and a semi-ring pipe B which are matched with each other. The openings of the semi-ring pipes A and the semi-ring pipes B are opposite and are buckled and fixed on the power transmission lines, and cutting mechanisms for cutting foreign matters on the power transmission lines are arranged at the front ends of the semi-ring pipes B. The walking mechanisms for cutting foreign matters are mounted on the adjacent power transmission lines, so that the foreign matters on the multiple power transmission lines can be synchronously cut and cleaned, and the cleaning efficiency is greatly improved. Through the multiple walking mechanisms fixed side by side, the stability of the walking mechanisms is effectively guaranteed, the walking mechanisms can stably and effectively walk along the power transmission lines, and powerful support is provided for cutting and cleaning of foreign matters by the cutting mechanisms.
Owner:STATE GRID CORP OF CHINA +1
Power transmission line lightning current fault type judgment method
ActiveCN110927529AReduce physical laborEnsure safetyFault location by conductor typesTelecommunicationsPower grid
The invention discloses a power transmission line lightning current fault type judgment method, and relates to the technical field of power transmission line lightning fault identification. The objectof the invention is to accurately determine the fault type in the existing power grid operation. According to the invention, direct measurement of direct lightning is carried out through the sensor installed at the tower top, a sensor installed on a three-phase line is used for indirectly measuring lightning current transmitted along the line, accurate full-waveform lightning parameters which aredirectly measured and key parameters which are indirectly measured in a large range are subjected to data accumulation, and the fault type of the tower is judged by analyzing measured data.
Owner:HARBIN INST OF TECH +1
Device for remotely controlling trip-out of power load management terminal of multi-specialty-transformer parallel running user
ActiveCN102761172BSolving the Difficulties of Remote TrippingTime-period power control is perfectCircuit arrangementsRemote controlTransformer
The invention discloses a device for remotely controlling the trip-out of a power load management terminal of a multi-specialty-transformer parallel running user. The device comprises a load management terminal (1), wherein the load management terminal (1) is provided with a first remote control trip-out control end (2), a second remote control trip-out control end (3), a third remote control trip-out control end (4) and a fourth remote control trip-out control end (5); the first remote control trip-out control end (2) is connected with all contact cabinets (6) of a parallel running user; the first remote control trip-out control end (2) is used for realizing the synchronous trip-out of all the contact cabinets (6) and maintaining the balance of specialty-transformer loads; and the second remote control trip-out control end (3), the third remote control trip-out control end (4) and the fourth remote control trip-out control end (5) are respectively connected with a load I (9), a load II (7) and a load III (8) according to the importance level of the loads.
Owner:STATE GRID CORP OF CHINA +3
Distribution box
InactiveCN108418119AGuaranteed waterproof performancePlay the role of waterproofBoards/switchyards circuit arrangementsSubstation/switching arrangement cooling/ventilationElectricityEngineering
The invention provides a distribution box, relates to the technical field of distribution equipment, and solves problems of poor waterproof, dustproof and fireproof performances and inconvenient maintenance of the distribution box. The distribution box comprises a casing provided with a heat radiation port, an internal temperature sensor, a temperature relay and a fan electrically connected in sequence and arranged in the casing, a movable illuminating lamp arranged in the casing, replaceable dust-sticking paper arranged in the casing, and a waterproof housing arranged outside the casing, thefan is arranged at the heat radiation port, a roof of the waterproof housing comprises a projection, the roof is in a downward inclined structure from the projection and extends to the outside of sidewalls of the waterproof housing, and the internal surface of the waterproof housing is provided with an explosion-proof clay layer, and a smoke sensor, a humidity sensor, an external temperature sensor, a control panel and a buzzing alarm arranged on the internal surface of waterproof housing. According to the distribution box, the movable illuminating lamp is provided so that the maintenance convenience is improved, dust in the casing is reduced through the dust-sticking paper, and the waterproof and fireproof performances are enhanced through the waterproof housing.
Owner:吉林嘉信科技有限公司
Equipped with intrinsically safe mine power supply to eliminate spark energy
PendingCN109167508ALower specific resistanceReduce burst currentPower conversion systemsIntrinsic safetyCarrying capacity
The invention discloses a mine intrinsically safe power supply with eliminating spark energy, comprises an intrinsically safe power supply body and a linear choke coil arranged in an explosion-proof housing, the positive electrode of the intrinsically safe power supply body is connected with one end of a linear choke coil inductance coil L1, the other end of the inductance coil L1 is connected with a positive electrode output terminal of the power supply, the positive electrode of the diode D1 is connected with the positive electrode output terminal of the power supply and the negative electrode is connected with the positive electrode of the intrinsically safe power supply body in parallel at both ends of the inductance coil L1; A negative electrode of an intrinsically safe power supply body is connected to one end of a linear choke coil inductance coil L2, At that other end of the inductor coil L2, a negative electrode output terminal of the power supply is connected, and a damp diode D2 is connected in parallel to both ends of the inductor coil L2. The positive electrode of the damping diode D2 is connected with the negative electrode of the intrinsically safe power supply body,and the negative electrode is connected with the negative electrode output terminal of the power supply. The invention has the advantage that the output carrying capacity of the intrinsically safe power supply for mining is improved.
Owner:郑州恒达智控科技股份有限公司
Outdoor high-voltage vacuum circuit breaker
PendingCN113690095AEasy to manageEnsure safe power supplyMeasurement devicesHigh-tension/heavy-dress switchesEngineeringPhotoresistor
An outdoor high-voltage vacuum circuit breaker comprises a stabilized voltage supply, a high-voltage vacuum circuit breaker body, a standby high-voltage vacuum circuit breaker, a prompt circuit, a time circuit, a contact detection circuit, a temperature detection circuit, an arc discharge detection circuit and a time delay circuit. The arc discharge detection circuit and the temperature detection circuit are respectively matched with a photoresistor and a temperature switch, the photoresistor is arranged at the outer side end of an arc extinguishing chamber of the high-voltage vacuum circuit breaker body, and the temperature switch is arranged at a heating part of the high-voltage vacuum circuit breaker body; the stabilized voltage supply, the time circuit, the contact detection circuit, the prompt circuit, the temperature detection circuit, the arc discharge detection circuit and the time-delay circuit are installed in the electric cabinet and are electrically connected with the high-voltage vacuum circuit breaker body and the standby high-voltage vacuum circuit breaker. The performance of the contact of the high-voltage vacuum circuit breaker body can be detected, and the temperature and whether an arc discharge phenomenon occurs can be detected in real time; and when overtemperature, arc discharge and poor contact performance occur, related personnel can be prompted by a short message for maintenance.
Owner:江凌晨
Device for remotely controlling trip-out of power load management terminal of multi-specialty-transformer parallel running user
ActiveCN102761172ASolving the Difficulties of Remote TrippingTime-period power control is perfectCircuit arrangementsRemote controlTransformer
The invention discloses a device for remotely controlling the trip-out of a power load management terminal of a multi-specialty-transformer parallel running user. The device comprises a load management terminal (1), wherein the load management terminal (1) is provided with a first remote control trip-out control end (2), a second remote control trip-out control end (3), a third remote control trip-out control end (4) and a fourth remote control trip-out control end (5); the first remote control trip-out control end (2) is connected with all contact cabinets (6) of a parallel running user; the first remote control trip-out control end (2) is used for realizing the synchronous trip-out of all the contact cabinets (6) and maintaining the balance of specialty-transformer loads; and the second remote control trip-out control end (3), the third remote control trip-out control end (4) and the fourth remote control trip-out control end (5) are respectively connected with a load I (9), a load II (7) and a load III (8) according to the importance level of the loads.
Owner:STATE GRID CORP OF CHINA +3
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