502 results about "Recloser" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention discloses a fault isolation method of an electric distribution network, comprising the steps: firstly, a remote control host computer judges if a switch-onto-fault latching exists or not according to the upload information after the remote control host computer receives a latching information: the current passing through a common recloser before the latching is detected to judge whether the current exceeds the setting value or not, if the current does not exceed the setting value, the latching is not a switch-onto-fault latching, and if the current exceeds the setting value, the latching is a switch-onto-fault latching; the host computer does not act when the latching does not belong to the switch-onto-fault latching; and the host computer firstly judges and processes before acting when the latching belongs to the switch-onto-fault latching. The method enhances the reliability and the safety of the latching of the recloser, reduces the high requirement to the performance of the control unit due to the excessively complicated judging conditions, and prevents the damage to the electric power system caused by the unnecessary switch-onto-fault in the network.