CN116742569B - Online monitoring device and method for circuit breaker - Google Patents
Online monitoring device and method for circuit breaker Download PDFInfo
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- CN116742569B CN116742569B CN202310717921.9A CN202310717921A CN116742569B CN 116742569 B CN116742569 B CN 116742569B CN 202310717921 A CN202310717921 A CN 202310717921A CN 116742569 B CN116742569 B CN 116742569B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 100
- 238000004891 communication Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 12
- 238000004458 analytical method Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 29
- 230000032683 aging Effects 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/08—Terminals; Connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
Abstract
The application relates to an on-line monitoring device and a monitoring method of a circuit breaker, wherein the on-line monitoring device comprises the following steps: the device comprises a mounting shell, a circuit breaker, a current input assembly, a current output assembly, a monitoring control assembly, a current monitoring piece, a signal monitoring piece and a breakdown prevention assembly. The two current monitoring pieces are arranged to detect the current of the current input assembly and the current output assembly, the signal monitoring piece can detect the signals of disconnection and connection of the circuit breaker, then the monitoring control assembly and the obtained switching signals of the current signals are utilized to judge whether the circuit breaker is faulty, such as damage, component aging and the like, and when the circuit breaker has large current, the connection of the current input assembly and the circuit breaker is cut off through the breakdown preventing assembly. The large current is a current close to the breakdown current, so that when the current is detected, the input current is cut off in time; avoiding the generation of electric power accidents.
Description
Technical Field
The application relates to the technical field of power equipment, in particular to an on-line monitoring device and a monitoring method of a circuit breaker.
Background
At present, the circuit breaker is an important component for bearing high-current on-off of a circuit in a power system, especially in a medium-high voltage power system, and as the high-voltage circuit breaker is applied to a severe environment or the operation frequency and time are increased continuously, the phenomenon of partial discharge of the high-voltage circuit breaker, namely the high-voltage circuit breaker partial discharge phenomenon, is often caused by ageing of the performance of an insulator in the high-voltage circuit breaker. The normal high-voltage circuit breakers have partial discharge phenomena more or less, and most of the partial discharge of the high-voltage circuit breakers cannot influence the normal operation of a power system, but the following two conditions (such as the sudden increase of the partial discharge value of the high-voltage circuit breakers or the frequent occurrence of jump values) can directly lead to the short-circuit breakdown of the high-voltage circuit breakers, thereby causing serious safety accidents of the power system. Therefore, the high-voltage circuit breaker is small in local amplification, and whether the working state of the high-voltage circuit breaker is normal or not is judged, so that the method becomes an important means for monitoring the safe operation in the power system.
In chinese patent CN 114243930A, a circuit breaker monitoring device and a monitoring system, the circuit breaker monitoring device comprises a primary circuit module, a secondary circuit module and a communication module, wherein: the primary circuit module comprises a three-phase power transmission line, three primary input ends of the three-phase power transmission line are respectively connected with three same-side outgoing line ends of the circuit breaker, and three primary output ends of the three-phase power transmission line are respectively connected with three wiring ends of a power grid; the secondary circuit module is connected with the internal circuit of the circuit breaker to monitor the internal circuit; the secondary circuit module is also used for monitoring a circuit signal passing through the primary circuit module; the communication module is connected with the secondary circuit module and used for communicating with the outside. The primary circuit module of the circuit breaker monitoring device is connected in series between the original circuit breaker and the power grid, so that the operation of the original circuit breaker is not interfered, and meanwhile, the monitoring of the electrical parameters and the internal circuits of the circuit breaker is realized; it is difficult to realize monitoring the broken circuit breaker and prevent the emergence of incident.
In addition, the existing partial discharge monitoring of the general circuit breaker only judges the insulation state of the circuit breaker by monitoring information of a partial discharge sensor, but cannot judge other faults, for example, the circuit breaker is not broken down but is in a disconnection state, but the circuit is not disconnected; moreover, when the breaker is monitored to be in a state that the discharge value suddenly increases, the circuit is difficult to effectively cut off, and the circuit is automatically recovered after the circuit is stabilized.
Disclosure of Invention
The embodiment of the application provides an on-line monitoring device and a monitoring method thereof for a circuit breaker, which are used for solving the problems that other faults are difficult to monitor in the related technology, and when a discharge value is unstable, circuit breakdown is difficult to effectively avoid.
In a first aspect, an on-line monitoring device for a circuit breaker is provided, comprising:
the installation shell is internally provided with an accommodating space which is used for arranging the circuit breaker;
a current input assembly disposed at a top of the installation housing and adapted to be connected to an input of the circuit breaker;
the current output assembly is arranged at the bottom of the installation shell and is used for being connected with the output end of the circuit breaker;
the monitoring control assembly comprises two current monitoring pieces which are respectively connected with the current input assembly and the current output assembly, and a signal monitoring piece which is connected with a switch control piece of the circuit breaker;
the breakdown prevention assembly is arranged on the current input assembly and is in signal connection with the monitoring control assembly; the anti-breakdown component is used for cutting off or communicating the connection of the current input component and the circuit breaker according to the signal of the monitoring control component.
In some embodiments, the current output assembly and the current input assembly each include an insulating frame and a plurality of posts disposed in the insulating frame at intervals by insulating mounting tabs.
In some embodiments, the binding post is coaxially provided with a slot;
the breakdown preventing assembly comprises a moving block and a vertical driving piece; the vertical driving piece is arranged on the insulating frame and is used for vertically moving the moving block; the top of the moving block is provided with a wire column, and the bottom of the moving block is provided with a first wire inserting column which is coaxial and communicated with the wire column; the first wire inserting column is inserted into the slot.
In some embodiments, the moving block is provided with a threaded hole;
the vertical driving piece comprises a screw rod and a first driving motor, the bottom of the screw rod is rotationally connected with the insulating frame, and the top of the screw rod penetrates through the threaded hole and is coaxially connected with the output end of the first driving motor.
In some embodiments, the number of the first driving motors is equal to the number of the wire posts, and the first driving motors are connected with the monitoring control assembly through connecting wires.
In some embodiments, the breakdown preventing assembly comprises an insulating sealing cover, a rectangular frame with an opening arranged up and down, and a movable communicating piece; the rectangular frame is arranged at the top of the insulating frame, the insulating sealing cover is covered on the rectangular frame, and the top of the binding post extends into the rectangular frame;
second wire inserting posts corresponding to the number of the binding posts are arranged on the insulating sealing cover at intervals; the second plug wire column is positioned above the binding post, and a containing channel is arranged between the second plug wire column and the binding post;
the rectangular frame is provided with a containing groove corresponding to the containing channel; the movable communication piece penetrates through the accommodating groove and extends into the accommodating channel; the movable communication piece comprises an insulating piece, and a communication block communicated with the second wire inserting column and the binding post is arranged on the insulating piece;
the outside of rectangle frame is equipped with the removal subassembly, and the removal subassembly with remove the communicating piece transmission and connect to be used for making to remove the communicating piece and stretch out or stretch into the passageway that holds.
In some embodiments, the bottom of the insulating sheet is provided with tooth grooves; the tooth grooves are arranged along the length direction of the insulating sheet, and the length of the tooth grooves is smaller than that of the insulating sheet;
the moving assembly comprises a second driving motor, an output shaft of the second driving motor is connected with a gear, and the gear is meshed with the tooth slot; the second driving motor is connected with the monitoring control assembly in a wireless signal mode.
In some embodiments, the monitoring control assembly includes a housing, and a signal receiving module and a calculating module are disposed in the housing, where the signal receiving module is used to obtain current signals of the current input assembly and the current output assembly monitored by the current monitoring element, and is used to receive the switching signals of the switching control element monitored by the signal monitoring element.
In some embodiments, two of the current monitoring elements are mounted on the top and bottom of the monitoring control assembly, respectively; the signal monitoring piece is arranged on one side surface of the monitoring control component, which is close to the installation shell, and penetrates through the installation shell to be connected with the circuit breaker.
In a second aspect, a monitoring method of an on-line monitoring device of a circuit breaker is provided, which includes the following steps:
the current signals of the current input assembly and the current output assembly monitored by the current monitoring piece are utilized, and the switching signals of the switching control piece monitored by the signal monitoring piece;
and acquiring the current signal and the switching signal by using a monitoring control component, and controlling according to the following rules:
if the switching signal is a communication signal and the current signals of the current input assembly and the current output assembly are the same, judging that the circuit breaker is normal;
if the switch signal is a communication signal and the current signals of the current input assembly and the current output assembly are different, entering an analysis mode; the analysis mode is as follows: calculating a difference value of current signals of the current input assembly and the current output assembly, and comparing the difference value with a set value; if the set value is lower than the set value, sending out and checking signals; otherwise, the monitoring control component controls the connection of the current input component and the circuit breaker to be cut off;
if the switch signal is an off signal and the current input assembly and the current output assembly both have current signals, the fault of the circuit breaker is judged, and the connection between the current input assembly and the circuit breaker is controlled by the monitoring control assembly.
The beneficial effects that technical scheme that this application provided brought include:
(1) The embodiment of the application provides an on-line monitoring device and a monitoring method thereof for a circuit breaker, because the two current monitoring pieces are arranged above to detect the current of a current input assembly and a current output assembly, the signal monitoring pieces can detect the disconnection and connection signals of the circuit breaker, then the monitoring control assembly and the obtained switching signals of the current signals are utilized to judge whether the circuit breaker is faulty or not, such as damage, element aging and the like, and when the circuit breaker has large current, the connection between the connection current input assembly and the circuit breaker is cut off through the breakdown prevention assembly, so that the generation of electric power accidents is avoided. A large current is understood to be a current close to the breakdown current, so that the input current is switched off in time when this current is detected.
If the switch signal is a communication signal and the current signals of the current input assembly and the current output assembly are different, entering an analysis mode; the analysis mode is as follows: calculating a difference value of current signals of the current input assembly and the current output assembly, and comparing the difference value with a set value; if the set value is lower than the set value, sending out and checking signals; otherwise, the monitoring control component controls the connection of the current input component and the circuit breaker to be cut off; the set value is a current value close to the breakdown current, and can be cut off before breakdown, so that maintenance personnel can know the fault of the circuit breaker, and early warning signals for maintenance are provided because the reasons of different currents are caused by ageing of components.
If the switch signal is an off signal and only the current signal of the current input assembly exists, judging that the circuit breaker is normal;
(2) If the switch signal is an off signal and the current input assembly and the current output assembly both have current signals, the fault of the circuit breaker is judged, and the connection between the current input assembly and the circuit breaker is controlled by the monitoring control assembly. The step shows that the circuit breaking action of the circuit breaker fails, maintenance personnel can be timely given out, generated fault information is avoided, and if the switching signals are communication signals and the current signals of the current input assembly and the current output assembly are different, an analysis mode is entered; the analysis mode is as follows: calculating a difference value of current signals of the current input assembly and the current output assembly, and comparing the difference value with a set value; if the set value is lower than the set value, sending out and checking signals; otherwise, the monitoring control component controls the connection of the current input component and the circuit breaker to be cut off; the set value is a current value close to the breakdown current, and can be cut off before breakdown, so that maintenance personnel can know the fault of the circuit breaker, and early warning signals for maintenance are provided because the reasons of different currents are caused by ageing of components.
(3) If the switch signal is an off signal and only the current signal of the current input assembly exists, judging that the circuit breaker is normal; if the switch signal is an off signal and the current input assembly and the current output assembly both have current signals, the fault of the circuit breaker is judged, and the connection between the current input assembly and the circuit breaker is controlled by the monitoring control assembly. The step shows that the circuit breaking action of the circuit breaker fails, maintenance personnel can be timely given out, generated fault information is avoided, and safety accidents are avoided.
(4) After receiving the signal of the monitoring control assembly, the vertical driving piece drives the first wire inserting column to move upwards to be separated from the slot, so that cutting is realized, and after maintenance, the first wire inserting column moves downwards to be connected again. The moving block is provided with a threaded hole; the vertical driving piece comprises a screw rod and a first driving motor, the bottom of the screw rod is rotationally connected with the insulating frame, and the top of the screw rod is provided with a threaded hole in a penetrating mode and is coaxially connected with the output end of the first driving motor. Through the cooperation of pivoted lead screw and screw hole for the movable block removes along the lead screw, and the benefit of such structure lies in can making the movable block not take place to remove for the position when rotating at the lead screw, and the moving track is stable, wholly adopts mechanical structure to reciprocate, and the fault rate is low, stable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a first view angle structure of an on-line monitoring device of a circuit breaker according to an embodiment of the present application;
fig. 2 is a schematic diagram of a second view angle structure of an on-line monitoring device of a circuit breaker according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a third view angle of the on-line monitoring device of the circuit breaker according to the embodiment of the present application;
fig. 4 is a structural schematic diagram of a fourth view angle of the on-line monitoring device of the circuit breaker according to the embodiment of the present application;
fig. 5 is a schematic diagram of a connection state between a monitoring control assembly and a mounting housing according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of a first embodiment of a breakdown preventing assembly according to an embodiment of the present application;
fig. 7 is a schematic view of a first view of a second embodiment of a breakdown preventing assembly according to an embodiment of the present application;
fig. 8 is a second view schematic diagram of a second embodiment of a breakdown preventing assembly according to an embodiment of the present application;
FIG. 9 is a schematic view of a structure with a receiving channel between an insulating cover and a terminal provided in an embodiment of the present application;
fig. 10 is a schematic flow chart of a monitoring method of an online monitoring device of a circuit breaker according to an embodiment of the present application.
In the figure: 1. a mounting shell; 2. a circuit breaker; 3. a current input assembly; 4. a current output assembly; 5. monitoring a control assembly; 6. a current monitoring member; 7. a signal monitoring member; 8. an anti-puncture assembly; 800. a moving block; 801. a vertical driving member; 8011. a screw rod; 8012. a first driving motor; 8013. a connecting wire; 802. a wire column; 803. a first plug wire post; 804. a rectangular frame; 805. an insulating cover; 806. moving the communicating piece; 8061. tooth slots; 807. a second plug wire post; 808. a receiving groove; 809. a moving assembly; 8091. a second driving motor; 8092. a gear; 810. a conduction block; 9. an insulating frame; 10. binding posts; 1000. a slot.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
The embodiment of the application provides an on-line monitoring device and a monitoring method thereof for a circuit breaker, which are used for solving the problems that other faults are difficult to monitor in the related technology, and when a discharge value is unstable, circuit breakdown is difficult to effectively avoid.
Referring to fig. 1-9, an on-line monitoring device for a circuit breaker includes: the circuit breaker comprises a mounting shell 1, a circuit breaker 2, a current input assembly 3, a current output assembly 4, a monitoring control assembly 5, a current monitoring piece 6, a signal monitoring piece 7 and a breakdown prevention assembly 8.
A mounting shell 1, wherein a containing space is arranged in the mounting shell and is used for setting a circuit breaker 2; a current input assembly 3 provided at the top of the installation housing 1 and adapted to be connected to an input terminal of the circuit breaker 2; a current output assembly 4 provided at the bottom of the installation housing 1 and adapted to be connected to an output terminal of the circuit breaker 2; a monitoring control assembly 5 comprising two current monitoring members 6 respectively connected to the current input assembly 3 and the current output assembly 4, and a signal monitoring member 7 connected to the switching control member of the circuit breaker 2; the breakdown prevention component 8 is arranged on the current input component 3 and is in signal connection with the monitoring control component 5; the breakdown preventing assembly 8 is used for cutting off or connecting the current input assembly 3 with the circuit breaker 2 according to the signal of the monitoring control assembly 5.
Wherein, the electric current output subassembly 4 and the electric current input subassembly 3 all include insulating frame 9 and a plurality of terminal 10, and a plurality of terminal 10 set up in insulating frame 9 through insulating mounting piece interval for the position of terminal 10 is fixed like this to insulate each other, not influence. Two current monitoring pieces 6 are respectively arranged at the top and the bottom of the monitoring control assembly 5; the signal monitoring piece 7 is installed on one side surface of the monitoring control assembly 5, which is close to the installation shell 1, and penetrates through the installation shell 1 to be connected with the circuit breaker 2.
By arranging the two current monitoring pieces 6 above, the current magnitude of the current input assembly 3 and the current output assembly 4 can be detected, the signal monitoring piece 7 can detect the signals of disconnection and connection of the circuit breaker 2, then the monitoring control assembly 5 and the obtained switching signals of the current signals are utilized to judge whether the circuit breaker is faulty, such as damage, element aging and the like, and when high current exists, the connection of the connected current input assembly 3 and the circuit breaker 2 is cut off through the breakdown preventing assembly 8, so that the generation of electric power accidents is avoided. A large current is understood to be a current close to the breakdown current, so that the input current is switched off in time when this current is detected.
In some preferred embodiments, the following arrangements are provided for the specific structure of the breakdown preventing assembly 8:
referring to FIG. 6, a first configuration
The binding post 10 is coaxially provided with a slot 1000; the breakdown preventing assembly 8 includes a moving block 800 and a vertical driving member 801; a vertical driving member 801 is mounted on the insulating frame 9 and serves to move the moving block 800 in a vertical direction; the top of the movable block 800 is provided with a wire column 802, and the bottom is provided with a first wire inserting column 803 which is coaxial and communicated with the wire column 802; the first socket 803 is plugged into the socket 1000. The number of the first driving motors 8012 is equal to the number of the wire columns 802, and the first driving motors 8012 are connected with the monitoring control component 5 through connecting wires 8013
When the monitoring control device is used, after receiving signals of the monitoring control assembly 5, the vertical driving piece 801 drives the first wire inserting column 803 to move upwards to be separated from the slot 1000, so that cutting is realized, and after maintenance, the first wire inserting column is moved downwards to be connected again.
Further, a threaded hole is formed in the moving block 800; the vertical driving piece 801 comprises a screw rod 8011 and a first driving motor 8012, wherein the bottom of the screw rod 8011 is rotationally connected with the insulating frame 9, and the top of the screw rod 8011 is provided with a threaded hole in a penetrating mode and is coaxially connected with the output end of the first driving motor 8012. Through the cooperation of pivoted lead screw 8011 and screw hole for movable block 800 removes along lead screw 8011, and the benefit of such structure lies in can making movable block 800 not take place to remove for the position when rotating in lead screw 8011, and the moving trajectory is stable, wholly adopts mechanical structure to reciprocate, and the fault rate is low, stable.
Referring to FIGS. 7-9, a second construction
The breakdown preventing assembly 8 comprises an insulating sealing cover 805, a rectangular frame 804 provided with an opening at the upper and lower parts and a movable communicating piece 806; a rectangular frame 804 is mounted on top of the insulating frame 9, an insulating cover 805 covers the rectangular frame 804, and the top of the binding post 10 extends into the rectangular frame 804;
second posts 807 corresponding to the number of the posts 10 are arranged on the insulating cover 805 at intervals; the second plug 807 is located above the post 10 with a receiving channel therebetween;
the rectangular frame 804 is provided with a containing groove 808 corresponding to the containing channel; the movable communication piece 806 penetrates through the accommodating groove 808 and extends into the accommodating channel; the movable connecting piece 806 comprises an insulating piece, and a conducting block 810 communicated with the second wiring plug 807 and the wiring post 10 is arranged on the insulating piece; the outside of the rectangular frame 804 is provided with a moving assembly 809, and the moving assembly 809 is in driving connection with the moving communicating piece 806 and is used for making the moving communicating piece 806 extend out of or into the accommodating channel.
When the connection is required, the moving assembly 809 passes the moving communicating piece 806 out of the accommodating passage and the accommodating groove 808, so that the second socket post 807 and the terminal post 10 have no communicable structure, and when the connection is required, the moving assembly enters the accommodating passage.
Wherein, in order to facilitate the movement assembly 809 to drive the movement communicating piece 806, there are the following arrangements:
the bottom of the insulating sheet is provided with tooth grooves 8061, and the tooth grooves 8061 are arranged along the length direction of the insulating sheet and the length of the tooth grooves 8061 is smaller than that of the insulating sheet; the moving assembly 809 comprises a second driving motor 8091, an output shaft of the second driving motor 8091 is connected with a gear 8092, and the gear 8092 is in meshed connection with the tooth groove 8061; the second driving motor 8091 is in wireless signal connection with the monitoring control assembly 5; accurate stable drive is realized through the meshing of gear 8092 and tooth groove 8061 to tooth groove 8061 sets up along the length direction of insulating piece, and its length is less than the length of insulating piece, avoids the insulating piece to remove the position excessively.
By the specific arrangement of the structures of the above two breakdown preventing members 8, the cutting function is realized.
In some preferred embodiments, the monitoring control assembly 5 includes a housing, in which a signal receiving module and a calculating module are disposed, the signal receiving module is configured to obtain current signals of the current input assembly 3 and the current output assembly 4 monitored by the current monitoring element 6, and to receive switching signals of the switching control element monitored by the signal monitoring element 7. Thereby realizing the processing of the detected signal. For specific procedures reference is made to the following monitoring methods.
Referring to fig. 10, the application further provides a monitoring method of the on-line monitoring device of the circuit breaker, which comprises the following steps:
the current signals of the current input assembly 3 and the current output assembly 4 monitored by the current monitoring piece 6 are utilized, and the switching signals of the switching control pieces monitored by the signal monitoring piece 7;
the current signal and the switching signal are acquired by the monitoring control component 5 and controlled according to the following rules:
if the switching signal is a communication signal and the current signals of the current input assembly 3 and the current output assembly 4 are the same, judging that the circuit breaker is normal;
if the switch signal is a communication signal and the current signals of the current input assembly 3 and the current output assembly 4 are different, entering an analysis mode; the analysis mode is as follows: calculating the difference value of the current signals of the current input assembly 3 and the current output assembly 4, and then comparing the difference value with a set value; if the set value is lower than the set value, sending out and checking signals; otherwise, the monitoring control component 5 controls the connection of the current input component 3 and the circuit breaker 2 to be cut off; the set value is a current value close to the breakdown current, and can be cut off before breakdown, so that maintenance personnel can know the fault of the circuit breaker, and early warning signals for maintenance are provided because the reasons of different currents are caused by ageing of components.
If the switching signal is an off signal and the current input assembly 3 and the current output assembly 4 have no current signal, judging that the circuit breaker is normal;
if the switching signal is an off signal and both the current input assembly 3 and the current output assembly 4 have current signals, the breaker is judged to be faulty, and the connection between the current input assembly 3 and the breaker 2 is controlled by the monitoring control assembly 5. The step shows that the circuit breaking action of the circuit breaker fails, maintenance personnel can be timely given out, generated fault information is avoided, and safety accidents are avoided.
Through the arrangement of the steps, the operation condition of the circuit breaker is analyzed, and the electric power accident that the high current breaks down is avoided.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. An on-line monitoring device of a circuit breaker, characterized in that it comprises:
a mounting shell (1) provided with a containing space therein for setting a circuit breaker (2);
a current input assembly (3) arranged on top of the mounting housing (1) and adapted to be connected to an input of the circuit breaker (2);
the current output assembly (4) is arranged at the bottom of the installation shell (1) and is used for being connected with the output end of the circuit breaker (2); the current output assembly (4) and the current input assembly (3) comprise an insulating frame (9) and a plurality of binding posts (10), and the binding posts (10) are arranged in the insulating frame (9) at intervals through insulating mounting sheets;
a monitoring control assembly (5) comprising two current monitoring elements (6) respectively connected with the current input assembly (3) and the current output assembly (4), and a signal monitoring element (7) connected with a switch control element of the circuit breaker (2);
the anti-breakdown component (8) is arranged on the current input component (3) and is in signal connection with the monitoring control component (5); the anti-breakdown component (8) is used for cutting off or communicating the connection of the current input component (3) and the circuit breaker (2) according to the signal of the monitoring control component (5);
the binding post (10) is coaxially provided with a slot (1000);
the anti-breakdown assembly (8) comprises a moving block (800) and a vertical driving piece (801); a vertical driving member (801) mounted on the insulating frame (9) and configured to vertically move the moving block (800); the top of the moving block (800) is provided with a wire column (802), and the bottom of the moving block is provided with a first wire inserting column (803) which is coaxial and communicated with the wire column (802); the first wire inserting column (803) is inserted into the slot (1000).
2. The on-line monitoring device of a circuit breaker of claim 1, wherein:
a threaded hole is formed in the moving block (800);
the vertical driving piece (801) comprises a screw rod (8011) and a first driving motor (8012), the bottom of the screw rod (8011) is rotationally connected with the insulating frame (9), and the top of the screw rod is provided with a threaded hole in a penetrating mode and is coaxially connected with the output end of the first driving motor (8012).
3. The on-line monitoring device of a circuit breaker of claim 2, wherein:
the number of the first driving motors (8012) is equal to the number of the wire posts (802), and the first driving motors (8012) are connected with the monitoring control assembly (5) through connecting wires (8013).
4. The on-line monitoring device of a circuit breaker of claim 1, wherein:
the anti-breakdown component (8) comprises an insulating sealing cover (805), a rectangular frame (804) with an opening arranged up and down and a movable communicating piece (806); the rectangular frame (804) is arranged at the top of the insulating frame (9), the insulating sealing cover (805) is covered on the rectangular frame (804), and the top of the binding post (10) extends into the rectangular frame (804);
second wiring columns (807) corresponding to the number of the wiring columns (10) are arranged on the insulating sealing cover (805) at intervals; the second wire inserting post (807) is positioned above the wire inserting post (10), and a containing channel is arranged between the second wire inserting post and the wire inserting post;
the rectangular frame (804) is provided with a containing groove (808) corresponding to the containing channel; the movable communication piece (806) penetrates through the accommodating groove (808) and extends into the accommodating channel; the movable communication piece (806) comprises an insulating piece, and a conducting block (810) communicated with the second wiring column (807) and the wiring column (10) is arranged on the insulating piece;
the outside of rectangle frame (804) is equipped with movable subassembly (809), and movable subassembly (809) with remove intercommunication piece (806) transmission connection to be used for making to remove intercommunication piece (806) and stretch out or stretch into the accommodation channel.
5. The on-line monitoring device of a circuit breaker of claim 4, wherein:
a tooth slot (8061) is arranged at the bottom of the insulating sheet; the tooth grooves (8061) are arranged along the length direction of the insulating sheet, and the length of the tooth grooves is smaller than that of the insulating sheet;
the moving assembly (809) comprises a second driving motor (8091), an output shaft of the second driving motor (8091) is connected with a gear (8092), and the gear (8092) is in meshed connection with the tooth groove (8061); the second driving motor (8091) is connected with the monitoring control assembly (5) in a wireless signal mode.
6. The on-line monitoring device of a circuit breaker of claim 1, wherein:
the monitoring control assembly (5) comprises a containing shell, a signal receiving module and a calculating module are arranged in the containing shell, the signal receiving module is used for obtaining current signals of the current input assembly (3) and the current output assembly (4) monitored by the current monitoring piece (6) and receiving switching signals of the switching control piece monitored by the signal monitoring piece (7).
7. The on-line monitoring device of a circuit breaker of claim 1, wherein:
the two current monitoring pieces (6) are respectively arranged at the top and the bottom of the monitoring control assembly (5); the signal monitoring piece (7) is arranged on one side surface of the monitoring control assembly (5) close to the installation shell (1), and penetrates through the installation shell (1) to be connected with the circuit breaker (2).
8. A method of monitoring an on-line monitoring device of a circuit breaker according to any one of claims 1 to 7, characterized in that it comprises the steps of:
the current signals of the current input assembly (3) and the current output assembly (4) monitored by the current monitoring piece (6) are utilized, and the switching signals of the switching control pieces monitored by the signal monitoring piece (7);
the current signal and the switching signal are acquired by a monitoring control component (5) and are controlled according to the following rules:
if the switching signal is a communication signal and the current signals of the current input component (3) and the current output component (4) are the same, judging that the circuit breaker is normal;
if the switching signal is a communication signal and the current signals of the current input component (3) and the current output component (4) are different, entering an analysis mode; the analysis mode is as follows: calculating the difference value of the current signals of the current input assembly (3) and the current output assembly (4), and then comparing the difference value with a set value; if the set value is lower than the set value, sending out and checking signals; otherwise, the monitoring control component (5) controls the connection of the current input component (3) and the circuit breaker (2) to be cut off;
if the switch signal is an off signal and the current input assembly (3) and the current output assembly (4) have current signals, the fault of the circuit breaker is judged, and the connection between the current input assembly (3) and the circuit breaker (2) is controlled to be cut off by utilizing the monitoring control assembly (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310717921.9A CN116742569B (en) | 2023-06-16 | 2023-06-16 | Online monitoring device and method for circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310717921.9A CN116742569B (en) | 2023-06-16 | 2023-06-16 | Online monitoring device and method for circuit breaker |
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| Publication Number | Publication Date |
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| CN116742569A CN116742569A (en) | 2023-09-12 |
| CN116742569B true CN116742569B (en) | 2024-04-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212062332U (en) * | 2020-05-21 | 2020-12-01 | 江苏常恒集团控制器件制品有限公司 | Breakdown prevention device of overload protector |
| CN214310754U (en) * | 2021-01-14 | 2021-09-28 | 南京陇源汇能电力科技有限公司 | Circuit breaker partial discharge monitoring system |
| CN114243930A (en) * | 2021-12-28 | 2022-03-25 | 浙江华云信息科技有限公司 | Circuit breaker monitoring device and monitoring system |
| CN114839522A (en) * | 2021-02-01 | 2022-08-02 | 通用电器技术有限公司 | Enhanced switchgear monitoring and diagnostics in a protective relay |
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2023
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212062332U (en) * | 2020-05-21 | 2020-12-01 | 江苏常恒集团控制器件制品有限公司 | Breakdown prevention device of overload protector |
| CN214310754U (en) * | 2021-01-14 | 2021-09-28 | 南京陇源汇能电力科技有限公司 | Circuit breaker partial discharge monitoring system |
| CN114839522A (en) * | 2021-02-01 | 2022-08-02 | 通用电器技术有限公司 | Enhanced switchgear monitoring and diagnostics in a protective relay |
| CN114243930A (en) * | 2021-12-28 | 2022-03-25 | 浙江华云信息科技有限公司 | Circuit breaker monitoring device and monitoring system |
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| CN116742569A (en) | 2023-09-12 |
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