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512 results about "Recloser" patented technology
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In electric power distribution, automatic circuit reclosers (ACRs) are a class of switchgear which is designed for use on overhead electricity distribution networks to detect and interrupt momentary faults. Also known as reclosers or autoreclosers, ACRs are essentially high voltage rated circuit breakers with integrated current and voltage sensors and a protection relay, optimized for use as an overhead network distribution protection asset. Commercial ACRs are governed by the ANSI/IEEE C37.60, IEC 62271-111 and IEC 62271-200 standards. The three major classes of operating voltage are 15.5 kV, 27 kV and 38 kV.
Intelligent configuration system for power distribution feeder reclosers and switches
ActiveUS20060116794A1Mechanical power/torque controlLevel controlRecloserIntelligent electronic device
An exemplary method for configuring an intelligent electronic device in a power delivery system includes receiving identification data for the intelligent electronic device, based on the received identification data and on capabilities of the intelligent electronic device, generating a configuration profile for the intelligent electronic device, receiving operating parameters for the intelligent electronic device, determining a coordination of the intelligent electronic device with the power delivery system based on the received operating parameters, displaying the determined coordination, modifying the configuration profile based on the received operating parameters and the determined coordination, and configuring the intelligent electronic device with the modified configuration profile.
Owner:ABB RES LTD
Feeder automation processing method and device of distribution network
InactiveCN101662144AMeet various needsMeet needsEmergency protective circuit arrangementsPower stationNetwork on
The invention relates to a feeder automation processing method and a device of a distribution network, wherein a first-time reclosing of a power station outlet recloser is used for eliminating transient line fault, if the first-time reclosing fails, the line fault of the time is permanent fault, section switches on all main networks on the line are separated, and then normal power supply of non-fault sections is recovered by being matched with time to isolate the fault sections according to the voltage and change condition thereof; if the permanent fault on a short branch line occurs, the section switch at the forficate part of the short branch line is separated and locked after two times of overcurrent pulse is counted and two sides of the switch lose power, thus realizing automatic isolation of the fault sections. In addition, the scheme also fully considers the processing during sing-phase earth fault. The invention leads fault processing to be simple, convenient and reliable, and can recover the normal power supply of all lines with transient fault or non-fault lines during permanent fault in a short time to the maximal extent.
Owner:胡诚
Automated intelligent configuration tool for power system protection and control and monitoring devices
InactiveUS20050097373A1Parameter calibration/settingComputer controlElectric power transmissionPower-system protection
An automatic configuration tool for use with power protection and restoration devices such as reclosers and switches in power transmission and distribution systems. An automatic configuration application provides a plurality of menus to a user on a graphical user interface to enable the user to select a plurality of options that are processed by various calculation engines to determine the configuration settings for a specific power protection and restoration device. The configuration settings that are generated are downloaded directly into the power protection and restoration device to provide protection, control and monitoring.
Owner:ABB RES LTD
Controller Circuit Including a Switch Mode Power Converter and Automatic Recloser Using the Same
An autorecloser circuit including a relay circuit with an electromagnetic relay configured to be coupled between an AC power source and a customer location to deliver current from the AC power source to the customer location. A controller coupled to the relay circuit is configured to control the electromagnetic. A current sense circuit coupled to the controller is configured to detect an amount of the current that is delivered to the customer location and a reference voltage circuit coupled to the controller is configured to establish a reference level for the amount of the current that is delivered to the customer location. A power circuit coupled to the controller and to the relay circuit is configured to provide a DC power source to the controller and to the relay circuit from the AC power source. The controller is configured to disconnect or reconnect the AC power source from the customer location based on the detected amount of current.
Owner:TE CONNECTIVITY CORP
Adaptive protection system for a power-distribution network
ActiveUS7110231B1Emergency protective arrangements for automatic disconnectionFeeder lineOvercurrent
A preferred embodiment of a system comprises a recloser electrically coupled to a voltage source of a power-distribution network and adapted to isolate a section of a distribution feeder of the power-distribution network from the voltage source in response to an overcurrent condition in the section of the distribution feeder. The system also comprises a sectionalizer electrically coupled to the section of the distribution feeder. The sectionalizer and the recloser are adapted to communicate via a data network and the recloser is responsive to control inputs sent to the recloser from the sectionalizer over the data network.
Owner:ABB INC
Symmetrical bipolar MMC DC-side single-pole ground fault ride-through and recovery method
ActiveCN107069679AReduce shockReduce power deficitEmergency protective circuit arrangementsRecovery methodDc circuit breaker
The invention provides a symmetrical bipolar MMC DC-side single-pole ground fault ride-through and recovery method. Through cooperation of a DC circuit breaker and a converter, DC fault current cut-off and power recovery are realized, and safe operation of the converter is protected. Through cooperation of active power and reactive power of the sound pole and the faulty pole, the active power deficiency of a converter station in the failure period is reduced. Rated reactive power is supplied to the grid, and therefore, the impact of a fault to an AC system is reduced. By actively controlling the common-mode components of the reference voltages of the upper and lower bridge arms of the converter, the risk brought to the safe operation of the system by excessive current surge stress of the converter due to reclosing failure is avoided. Based on the fact that a dual-pole short-circuit fault at the DC side of a symmetrical bipolar MMC can be regarded as a special case of single-pole ground faults of both positive and negative DC buses, the method of the invention can be used to handle a dual-pole short-circuit fault at the DC side of a symmetrical bipolar MMC.
Owner:HUAZHONG UNIV OF SCI & TECH
Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line
InactiveCN101483337ARealize automatic restoration of power supplyFind quicklyFault locationArrangements responsive to excess currentMature technologyPower grid
The present invention discloses a apparatus and method for automatic isolation of fault section of short circuit fault of power distribution network overhead network and single-phase earth fault, and power supply automatic recovery of non-fault section, which is suitable for power distribution network electric network overhead network of 3-10kV. The principle of automatic isolation and power supply automatic recovery is as following: mount a plurality of voltage type recloser on the overhead network to separate the network into a plurality of sections; when fault occurs, a relay protection device or a line selection device transmits signal to automatically break off or close a faulty line outlet breaker according to preset delay time and action sequence, and then coordinate with the network recloser; determine fault section through one time reclosing; isolate fault section through secondary reclosing and then recover power supply in non-fault section. At the same time, a detection terminal installation mounted on a substation can automatically judge section where the fault in, and transmit the fault message to a scheduling background while transmitting to designated customers in short message way. The present invention is provided with mature technology and high reliability.
Owner:BEIJING SHENGHUAHONGYE TECH
Autoloop system and method of operation
ActiveUS20100036538A1Performance delayBatteries circuit arrangementsLevel controlRecloserElectric power distribution
A system and method for operating an autoloop system on a electrical distribution system is provided. The system includes a master controller that is disposed in communication with controllers associated with reclosers and switches coupled to a first and second branch circuit. The system is arranged to momentarily block the one fast tripping function of a feeder recloser in response to the detection of a fault on the other branch circuit. The system further includes means for isolating a segment on which a fault is located and restoring electrical power service to those areas upstream and downstream from the isolated segment.
Owner:CONSOL EDISON OF NEW YORK
On-site coinciding type fault isolation method and system
ActiveCN106786425AReduce the number of tripsReduce power restoration timeEmergency protective arrangements for automatic disconnectionDividing circuitsTransformer
The invention provides an on-site coinciding type fault isolation method and system. The method comprises the steps of controlling a transformer substation outgoing breaker or a first section breaker of a main feeder for sequentially forming tripping and single shot reclosing, and isolating a main feeder fault; setting the action delay time of a branch circuit breaker to be shorter than the action delay time of the transformer substation outgoing breaker and the section breaker, and controlling the branch circuit breaker to sequentially perform tripping and single shot reclosing to isolate a main feeder branch circuit fault; setting the action delay time of a user dividing circuit breaker to be shorter than the action delay time of the transformer substation outgoing breaker, the section breaker and the branch circuit breaker, and performing controlling. Compared with the prior art, the on-site coinciding type fault isolation method and system can reduce the tripping frequency of the transformer substation outgoing breaker and further shorten the fault isolation time and the power supply recovery time of a non-fault region.
Owner:CHINA ELECTRIC POWER RES INST +2
Electrical circuit interrupting device
InactiveUS6852939B2Compact and less-expensiveEasy to disassembleSwitch power arrangementsHigh-tension/heavy-dress switchesRecloserDistribution system
A recloser for use with an electrical power distribution system including a circuit interrupter including a primary contact and a movable contact movable relative to the primary contact between a closed position allowing current to pass through the circuit interrupter and an open position separating the contacts and preventing current from passing through the circuit interrupter. An actuator is coupled to the circuit interrupter. The actuator includes a movable shaft coupled to the movable contact of the circuit interrupter for substantially simultaneous movement therewith and without insulation being disposed between the movable contact and the movable shaft. An electronic control is electrically connected to the actuator. The electronic control communicates with the actuator upon occurrence of a fault current to trigger the shaft to move the movable contact of the circuit interrupter from the closed position to the open position and to trigger the shaft to reclose the movable contact from the open position to the closed position upon termination of the fault current.
Owner:HUBBELL INC
Recloser of circuit breaker
InactiveCN104201072AExtended service lifeReduce impactProtective switch operating/release mechanismsRecloserEngineering
The invention discloses a recloser of a circuit breaker. The recloser comprises a shell, a forward and reverse rotation motor, a spindle and a driving handle, wherein the forward and reverse rotation motor is arranged in the shell, and the driving handle is used for driving a handle of the circuit breaker in linkage. A transmission blade and a transmission part are rotatably arranged on the spindle, the forward and reverse rotation motor is matched with the transmission blade in a driving and connecting manner, a transmission gear taking the spindle as a rotation center is arranged on the transmission part, a handle gear in mesh transmission with the transmission gear is arranged on the driving handle, an arc groove is formed in the outer surface of the transmission blade corresponding to the transmission part, the center of the arc groove is positioned on the center line of the spindle, an opening is formed in the anticlockwise edge end of the arc groove in the transmission blade, a linkage shaft is rotatably arranged on the transmission part in a combined manner, and the transmission blade and the transmission part are matched structures which are linked anticlockwise and mutually free clockwise. The recloser has the advantages that the handle of the circuit breaker can be reclosed, response time of normal tripping of the circuit breaker cannot be affected and the like.
Owner:ZHEJIANG MARKARI ELECTRIC +3
Intelligent reclosure breaker and automatic reclosure control method thereof
ActiveCN104377816AIncrease security protection functionRaise the level of security protection functionEmergency protective arrangements for automatic disconnectionInformation technology support systemControl cellRecloser
An intelligent reclosure breaker comprises an operating mechanism, a current and electric leakage detection module, a power module, a voltage detection module, an electric reclosure mechanism, a control unit and a signal interaction module, wherein the voltage detection module is connected to the incoming line side of a main circuit and the rear end of a contact device; the signal interaction module is connected with the control unit and used for signal data interaction. According to an automatic reclosure control method, users can set which voltage faults need tripping and which instantaneous voltage faults allow automatic reclosure through the signal interaction module; the control unit carries out automatic judgment and controls whether the operating mechanism carries out tripping or not according to current signals and voltage signals input by the detection modules and threshold value parameters preset by the signal interaction module. After instantaneous voltage or current faults cause tripping, the control unit carries out automatic judgment to determine whether the faults are allowed to be recovered or not according to the voltage signals collected by the voltage detection module after the breaker trips and the threshold value parameters preset by the signal interaction module, and controls the electric reclosure mechanism whether to carry out electric reclosure or not.
Owner:ZHEJIANG CHINT ELECTRIC CO LTD
Modular substation feeder assembly
InactiveUS8441778B1Low costShorten the timeBoards/switchyards circuit arrangementsSubstation mounted on poleRecloserModularity
A modular substation feeder assembly comprising a substantially rigid and collapsible support frame is presented. In particular, the support frame of the present invention comprises a plurality of at least two members disposed in a movable or removable relation to one another and structured to dispose the support frame between the collapsed position and into the operative expanded position. The feeder assembly comprises a support stand cooperatively structured to support or house a recloser or circuit breaker. When the support frame is disposed in the collapsed position, the support stand is oriented at least partially within a internal clearance zone which is defined as an area free of electrical components, including insulators, cross bars, etc.
Owner:EEG POWER DISTRIBUTION CORP
Localized application of high impedance fault isolation in multi-tap electrical power distribution system
InactiveUS20180233895A1Detection securitySafe isolationFault location by conductor typesShort-circuit testingRelationship - FatherDistribution power system
A high impedance fault isolation system (HIFIS) identifies, isolates and dissipates high impedance, low current faults which occur within an individual tap, or branch, of an electric power distribution system using only portions of the tap affected. A master meter, or father smart meter (FSM), on the affected tap sends a coded signal to an antenna receiver combined with a microprocessor and chip which operates an electromagnetic control (EMC) grounding spring switch which isolates the downed primary conductor by causing the distribution system protecting device, i.e., a high voltage fuse or recloser, to de-energize the downed primary wire. This localized application of the HIFIS at the individual tap level allows the FSM to analyze and determine, for example, that the specific field condition is a “downstream wire down”, and that the installed isolating device has failed to operate because of insufficient fault current, allowing the localized intervention of the HIFIS to achieve the de-energization more efficiently and safely, and within a much shorter time period. A fire door sensor circuit then receives the trip signal from the microprocessor, causing the fire door sensor to melt open and release a shorting spring, in initiating operation of an expulsion fuse or recloser, which kills the downed live wire.
Owner:ELECTRICAL MATERIALS
Bridge circuit, high voltage DC circuit breaker and control method thereof
ActiveCN105356411ALess snubber circuitsLarge installation spaceEmergency protective arrangements for automatic disconnectionCapacitancePower semiconductor device
The present invention discloses a bridge circuit which comprises an H-bridge switch module and an RCD buffer module. The H-bridge switch module comprises four power semiconductor switch devices. Each two power semiconductor switch devices are in same direction series connection to form a bridge arm. Two bridge arms are connected in parallel, and the middle points of the two bridge arms are taken as an input end and an output end. The RCD buffer module comprises a diode and a capacitor in mutual series connection, and two ends of the diode and the capacitor are in parallel connection with resistors respectively. The RCD buffer module is in parallel connection with the bridge arm formed by the series connection of each two power semiconductor switch devices. The number of the RCD buffer module included in the circuit is small, and the installation space is large. The invention also discloses a high voltage DC circuit breaker formed by the cascade connection of the bridge circuits, the high voltage DC circuit breaker has a reclosing function. The present invention also discloses a control method of the high voltage DC circuit breaker.
Owner:NR ELECTRIC CO LTD +1
Protection method and protection device of power distribution network
InactiveCN102904228AEmergency protective arrangements for automatic disconnectionPhase currentsHemt circuits
The invention relates to a protection method and a protection device of a power distribution network. The method comprises the following step of: arranging the protection devices used for carrying out logic control on opening and closing states on the breaker switch, linked switch and recloser of the power distribution network with phase voltages (UA, UB and UC) and phase currents (IA, IB and IC), wherein the logic control comprises voltage loss opening protection, hemi-voltage reclosing protection, current protection type voltage reclosing, latch-up separating protection, reclosing detection failure current protection, transient voltage latch-up protection, bilateral voltage latch-up closing protection, ring closing input withdrawing and hemi-voltage closing; and each protection device comprises a mutual inductor, a signal amplification circuit, a signal conditioning circuit (filtering circuit), an A / D (Analog / Digital) conversion module, an optical coupler, a communication module and a CPU (Central Processing Unit). By virtue of a plurality of creative protection logics and the corresponding protection devices, rapid fault region isolation and non-fault region power supply recovery for the power distribution network can be realized.
Owner:NANJING INTELLIGENT DISTRIBUTION AUTOMATION EQUIP
Recloser device and method of operation
A device for interrupting a flow of electrical power in an electrical distribution system is provided. The electrical distribution network includes a circuit interrupting device, the circuit interrupting device having a reclose time. The device includes a sensor configured to generate a signal in the event of loss of system power. A switch is coupled to the electrical distribution system and is movable between an open and closed position. A controller is operably coupled to the sensor and the switch, the controller having a processor that initiates a timer in response to the signal and determines a measured reclose time with the timer. The processor is further responsive to actuate the switch in response to the measured reclose time is substantially equal to the reclose time of the at least one circuit interrupting device.
Owner:CONSOL EDISON OF NEW YORK
Method of wire break detection
ActiveUS20200191841A1Fault location by conductor typesCurrent measurements onlyCurrent transducerElectric distribution network
A system and method for detecting a high impedance fault in an electrical line strung along and between utility poles, where the line is part of an electrical power distribution network. A current sensor is provided on each line segment between the utility poles, where each current sensor harvests power therefrom and continuously monitors the current flow on the line segment. An observer / repeater device is provided on a number of the poles and each is in communication with certain select ones of the current sensors to receive the current measurements therefrom. One of the observer / repeater devices compares the current readings transmitted to it from the subordinate current sensors, and if a violation of Kirchhoff's current law exists, an indication of a high impedance fault occurs, where the observer / repeater device relays the current irregularity to an upstream recloser to take appropriate action.
Owner:S&C ELECTRIC
Method for restarting electromotor after power failure
The invention relates to a method for restarting an electromotor after power failure. The electromotor power failure restarting logic is divided into restarting charge, restarting discharge and restarting action, and the power failure restarting can be carried out only after the charge is finished, wherein the restarting charge has the condition that after the electromotor is in a normal running state for 0.2-1s, charge is finished; the restarting discharge has the condition that after the electromotor is powered down due to a power failure command or an internal faults, the electromotor should not be started, and if the electromotor is restarted, discharge is carried; the restarting action (begins to time) has the condition that after the restarting charge is finished, the device judges that the electromotor trips because a contactor is broken off due to interference or electricity loss, and at the moment, an electricity loss timer begins to time accumulated electricity loss time; and after the voltage recovers to a normal value, the electromotor is automatically started in batches according to preset sequence time. The invention provides a reliable and economical electromotor (group) restarting method on the basis of absorbing the experience of high-voltage line reclosing by combining with the running characteristics of a low-voltage electromotor.
Owner:NR ELECTRIC CO LTD +1
Automatic reclosing lock device of intelligent circuit breaker
ActiveCN103683176AGuaranteed uptimeReliable actionEmergency protective arrangements for automatic disconnectionControl powerRecloser
Owner:STATE GRID CORP OF CHINA +2
Load circuit fault detection circuit and method applied to breaker reclosing
ActiveCN103560479AEasy to identifyImprove reliabilityElectrical testingEmergency protective arrangements for automatic disconnectionLoad circuitShort circuit protection
The invention provides a load circuit fault detection circuit and method applied to breaker reclosing. The load circuit fault detection circuit comprises a detecting circuit and a controller, the detecting circuit is connected with a load circuit for detecting the load circuit, and the detecting circuit comprises a short circuit detecting circuit and an electric leakage detection circuit which are used for detecting the short circuit fault and the electric leakage fault of the load circuit respectively. The controller is connected with the detecting circuit and a breaker respectively, and the controller controls the detecting circuit to detect the load circuit before the breaker is closed. According to the load circuit fault detection circuit, on the basis of electric leakage protection, short circuit protection and overload protection during normal working of a load, fault detection is conducted on the faulted breaker before reclosing, the load circuit is reclosed after the fault is removed, and the safety performance of the reclosed breaker is improved. The problems that whether circuit faults are overcome can not be determined, and potential safety hazards exist in a breaker in the prior art are effectively solved.
Owner:NANJING JIETAI ELECTRIC POWER EQUIP
Outdoor high voltage solid-sealed polar pole or recloser
InactiveCN106128850AFirmly connectedImprove reliabilityHigh-tension/heavy-dress switchesAir-break switchesElectrical conductorRecloser
The invention discloses an outdoor high voltage solid-sealed polar pole or recloser which comprises a solid insulation shell, an upper wire inlet conductor, a capacitor, a vacuum arc-extinguishing chamber, a lower wire outlet conductor, a transition conductive connection part and a grounding layer. The solid insulation shell is provided with the upper wire inlet conductor, the capacitor, the vacuum arc-extinguishing chamber, the lower wire outlet conductor, and the transition conductive connection part. The grounding layer is arranged at the outer surface of the solid insulation shell. The upper and lower ends of the vacuum arc-extinguishing chamber are provided with upper and lower shielding rings. The lower end of the transition conductive connection part is provided with a shielding ring, and one side of the transition conductive connection part is also provided with temperature sensor. According to the outdoor high voltage solid-sealed polar pole or recloser, through introducing the design of the grounding layer, the shielding rings and the temperature sensor, the prepared outdoor high voltage solid-sealed polar pole or recloser can measure the current and voltage in a line, equipment is protected, the influence of an external environment is small, and thus the overall reliability stability and security are improved.
Owner:厦门普力维进出口有限公司
Operation method for replacing strain insulator of 35kV overhead distribution line in live state
InactiveCN104113007ASave human resourcesConvenient in placeApparatus for overhead lines/cablesTruckElectric field
The invention provides an operation method for replacing a strain insulator of a 35kV overhead distribution line in a live state. The method is an intermediate-potential insulating glove operation method in which a strain insulator is replaced by use of an insulating bucket arm truck, and the method is jointly implemented by a person in charge of operation, an electrician on ground and an in-bucket operation electrician. The method mainly comprises the following steps: stop of maintenance line reclosing is applied; the operation workers detect tools; the in-bucket operator wears insulated equipment, enters the bucket and loads the tools in the bucket; the in-bucket electrician enters an electric field through an insulating bucket arm truck to do insulating shield; auxiliary tools for operation are mounted; a tension insulator is replaced; the shield is removed; the operators leave the electric field; and maintenance line reclosing is recovered. The operation method of the invention saves human resources, is convenient and fast in emergence maintenance, high in efficiency, and flexible and convenient in field switching, and obviously improves guarantee on personal safety of the operators.
Owner:CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +2
Power restoration method for voltage type fault section front end
ActiveCN104124672AImplement automationTroubleshoot Restoration of PowerEmergency protective arrangements for automatic disconnectionTransformerRemote control
Disclosed is a power restoration method for a voltage type fault section front end. Time from reclosing to tripping is calculated according to transformer substation protection trip time, first reclosing time, and transformer substation re-tripping time; calculation is performed according to the time and time limit set parameters of a voltage type switch device on lines so as to determine a specific section of a fault section; when a fault is located in a first section, a master station system shuts switching-on of a transformer substation line outlet switch; when the fault is located in a non-first section, the master station system sends out a switching-on instruction in a remote control mode. According to the power restoration method for the voltage type fault section front end, under the condition that the transformer substation line outlet switch lacks secondary reclosing, the fault section is automatically judged by using a distribution automation system; under the condition that secondary reclosing of a transformer substation protection device is not transformed, the problem of power restoration of the voltage type feeder automation fault section can be solved, meanwhile, modification of a transformer substation reclosing device can be avoided, expenses for changing settings or replacing devices are reduced, and an influence on operation of the transformer substation protection device is avoided.
Owner:STATE GRID CORP OF CHINA +2
Reclosing control system and method using superconducting fault current limiter
ActiveUS20110032650A1Reduce fault currentEmergency protective arrangements for limiting excess voltage/currentSuperconductor elements usageElectric power transmissionControl system
The present invention relates to a reclosing control system and method using a superconducting fault current limiter. The reclosing control system includes a superconducting fault current limiting device in which two circuits, each having a switch and a superconducting fault current limiter connected in series with each other, are connected in parallel with each other. A recloser is disposed between the superconducting fault current limiting device and a distribution line and is configured to control reclosing. The distribution line is connected to the recloser and is configured to transfer power to a load.
Owner:INTELLECTUAL DISCOVERY CO LTD
Superposed sequential setting method of inhibition band parallel reactor compensation line three-phase reclosing overvoltage
InactiveCN102412548AIncrease tuning speedSmall amount of calculationEmergency protective arrangements for automatic disconnectionOvervoltagePhase shifted
The invention relates to a superposed sequential setting method of inhibition band parallel reactor compensation line three-phase reclosing overvoltage, belonging to the power system relay protection technology field. The method comprises the following steps: by utilizing a WARD equivalent method, calculating equivalent impedances of a head end bus and a tail end bus of a fault line, and determining a large power supply side and a small power supply side; according to a terminal voltage size of a fault phase after trip-out, discriminating a fault property; when the fault is a transient fault, if line actual compensativity is less than critical compensativity, superposing the large power supply side, conversely, superposing the small power supply side; if the fault is a permanent fault, calculating an arithmetic product of a power frequency voltage step-up ratio when superposing the large power supply sides first and a healthy phase voltage step-up ratio caused by a single-phase ground fault, calculating an arithmetic product of a power frequency voltage step-up ratio when superposing the small power supply sides first and a healthy phase voltage step-up ratio caused by a single-phase ground fault, comparing the two arithmetic products, and superposing a side with a smeller arithmetic product. According to the method, line critical compensativity is only related to line length and a phase shift coefficient, raising superposed sequential setting speed in the transient fault is facilitated, amount of calculation is small, the method is simple and feasible, and a line single-phase fault can be reduced effectively to carry out overvoltage level of three-phase reclosing.
Owner:KUNMING UNIV OF SCI & TECH
Double loop cross wire failure type discriminating method for stabilizing control system
InactiveCN101388544AConducive to system stabilityEmergency protective circuit arrangementsFault locationSingle phaseFailure type
The invention relates to a method for judging fault types of double-loop interline for a stabilized control system, which comprises the following steps: firstly, the method of getting ready for judging interline faults, secondly, a method for judging double-loop same-name phase interline grounding faults comprises rapidly judging the fault as double-loop area same-name phase interline grounding faults before a brake in an integral group is repeatedly closed if the line and an adjacent line both have some same-name single-phase faults, thirdly, a method for judging double-loop different-name phase interline grounding faults comprises rapidly judging the fault as the line area different-name interline grounding faults when the line interphase faults jump a single phase and an adjacent single-phase faults jump a single phase, fourthly, a method for judging the faults of double-loop single phase which strides a plurality of phases comprises rapidly judging the faults of single phase which strides a plurality of phases in double-loop area if a single phase of the line is instantly judged out and adjacent line phases go wrong, fifthly, a method for judging the faults of double-loop multiple phases which strides multiple phases comprises rapidly judging faults of multiple phases which stride multiple phases in a double-loop area if the line and the adjacent both have interphase faults.
Owner:NORTHEAST CHINA GRID +1
Intelligent recloser
InactiveCN101710685AExtended service lifeAvoid the impact of high currentEmergency protective arrangements for automatic disconnectionFault locationElectronic switchRecloser
The invention provides an intelligent recloser, which comprises a breaker switch, an operating mechanism, an upper disconnecting switch, a lower disconnecting switch, a current transformer, a high-voltage fuse, a voltage transformer, an electronic switch and an intelligent device, wherein the breaker switch is connected to a main circuit and positioned between the upper disconnecting switch and the lower disconnecting switch; the electronic switch is connected in parallel with the breaker switch; the current transformer is sleeved on a circuit branch of the breaker switch; the breaker switch is connected in parallel with the electronic switch; the intelligent device is connected to the current transformer and the operating mechanism; and the operating mechanism is connected with the breaker switch. The intelligent recloser can intelligently detect whether a fault exists, and can be reclosed or closed correspondingly to a latch, thereby greatly reducing harm to dash current, prolonging service life of the switch and greatly shortening interruption maintenance time.
Owner:深圳市联创知识产权服务中心
Bypass recloser assembly
InactiveUS6936779B2Quick installationReduce in quantitySwitches with movable electrical contactsHigh-tension/heavy-dress switchesRecloserEngineering
A bypass switch recloser assembly has a first switch assembly connected electrically in series to a second switch assembly. A bypass switch assembly is connected electrically in parallel to the first and second switch assemblies. A recloser assembly is connected electrically in series to the first and second switch assemblies and electrically in parallel to the bypass switch assembly. The first, second and bypass switch assemblies and the recloser are mounted on a support assembly. The support assembly mounts the bypass switch recloser assembly to a support.
Owner:HUBBELL INC
Gas-blast arc extinction lightning protection gap for power equipment
ActiveCN101964520AMake sure not to tripWith gas blowing arc extinguishing functionEmergency protective arrangements for limiting excess voltage/currentEngineeringPower equipment
The invention relates to a lightning protection device for power equipment, in particular to a gas-blast arc extinction lightning protection gap for the power equipment of various voltage classes. The gas-blast arc extinction lightning protection gap for the power equipment comprises parts such as a high-pressure side connecting body, a grounding connecting body, a gas generator, a signal detection unit, a high-voltage electrode, a grounding electrode and the like, wherein the gas generator is arranged nearby the high-voltage electrode or the grounding electrode; the signal detection unit generates a trigger signal after lightning current passes through the signal detection unit; the gas generator is started so as to generate airflow sufficient to blow an electric arc out; in the gas generator, compressed gas is packaged by gas pellets which are packaged by gas bombs; a plurality of gas bombs are sequentially arranged and packaged in the gas generator; and actuated gas bomb frameworks are replaced by unactuated gas bombs automatically, and the action times of the gas generator are determined by the number of the gas bombs. In the lightning protection device, the electric arc can be rapidly blown out, the reclosing success rate is improved and the lightning protection reliability of the power equipment is improved.
Owner:王巨丰
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