CN105225881B - Disconnecting switch anti-error system for 110kV power grid - Google Patents
Disconnecting switch anti-error system for 110kV power grid Download PDFInfo
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- CN105225881B CN105225881B CN201510674502.7A CN201510674502A CN105225881B CN 105225881 B CN105225881 B CN 105225881B CN 201510674502 A CN201510674502 A CN 201510674502A CN 105225881 B CN105225881 B CN 105225881B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
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Abstract
The present invention relates to a kind of disconnecting switch anti-error systems for 110kV power grid.Including moving knife lock cell, earthing knife-switch lock cell, interlocking unit, locking device is set in disconnecting switch, when avoiding because of console far distance control, generate error signal, the disconnecting switch anti-error system malfunction for being used in 110kv power grid influences the safety of equipment, avoid personnel misoperation, influence of the controller error signal to disconnecting switch safety, improve the safety of power grid, avoid influence of the disconnecting switch anti-error system malfunction for 110kv power grid to personal safety, the electric current that the locking device directly generates the induction of coil utilizes, without in addition powering, avoid influence of the power supply system to the locking device normal use.
Description
Technical field
The present invention relates to a kind of disconnecting switch anti-error systems for 110kv power grid.
Background technique
Disconnecting switch anti-error system for 110kv power grid is switch electricity important in power plant and substation's electrical system
Device, need to match with high-voltage circuitbreaker, and major function is：Guarantee the safety of High-Voltage Electrical Appliances and device in service work,
Play isolation voltage, cannot with cut off, put into load current and cut-off short circuit current, can only be used to not generate powerful electricity
Certain handover operations of arc, i other words it does not have arc-suppression function；It is divided by infield difference, formula outside formula and room, is pressed within doors
Insulation column number is divided into, open side type, and queen post and three pillar type, each voltage class have optional equipment.For 110kv power grid
Disconnecting switch anti-error system ensure that the safety of High-Voltage Electrical Appliances and device in service work, play isolation voltage, cannot
With with cut off, put into load current and cut-off short circuit current, can only be used to the certain handover operations for not generating powerful electric arc, be
Say that it does not have arc-suppression function；It is divided by infield difference, formula outside formula and room, is divided into, single-column by insulation column number within doors
Formula, queen post and three pillar type, each voltage class have optional equipment.Can also by the part for needing to have a power failure in high voltage distribution installation with
Live part is reliably isolated, to guarantee the safety of service work.The contact of disconnecting switch anti-error system for 110kv power grid
All open to have apparent cut-off point in air, disconnecting switch does not have arc-control device, therefore cannot be used to cut off load electricity
Stream or short circuit current, otherwise under high pressure effect, cut-off point will generate strong electric arc, and be difficult self-extinguish, in some instances it may even be possible to make
At arcing, scaling loss equipment jeopardizes personal safety, and here it is the major accidents of so-called " on-load drawing disconnecting switch ".For 110kv
The disconnecting switch anti-error system of power grid can also be used to carry out the handover operation of certain circuits, to change the method for operation of system.
Such as：In double-bus circuit, can with for 110kv power grid disconnecting switch anti-error system by running circuit from one
Bus is switched on another bus.
Present disconnecting switch is frequently used in each substation, the movement of disconnecting switch be usually by console into
Row far distance control, the disconnecting switch anti-error system for 110kv power grid is unable to on-load and acts this feature, existing " five is anti-"
Although some safeguards have been done in measure, due to the reasons such as maloperation or controller error signal, most probably cause to be isolated
The earthing knife-switch malfunction in disconnecting switch is switched or be mounted on, serious danger is caused, endangers power grid security.
Summary of the invention
It is an object of the invention to：In view of the above problems, it provides and a kind of keeps apart official seal for 110kv power grid
Locking device is arranged in error system in disconnecting switch, when avoiding because of console far distance control, generates error signal, uses
The safety of equipment is influenced in the disconnecting switch anti-error system malfunction of 110kv power grid, personnel misoperation, controller is avoided to miss
Influence of the signal to disconnecting switch safety, improves the safety of power grid, avoids the anti-error system of disconnecting switch for 110kv power grid
Influence of the malfunction of uniting to personal safety, the electric current which directly generates the induction of coil utilizes, without in addition
Power supply, avoids influence of the power supply system to the locking device normal use.
The technical solution adopted by the present invention is as follows：
The invention discloses a kind of disconnecting switch anti-error systems for 110kv power grid, including：
Moving knife lock cell, including 10kw-15kw moving knife motor, the moving knife column of 2m-2.2m long, 4m-4.5m long moving knife bar,
Current sensor, the first electromagnetic lock and moving knife latch mechanism；Moving knife column is movably connected on switch frame, and moving knife bar is horizontally installed on
The top of moving knife column connects moving knife motor in the lower part of moving knife column, and moving knife motor rotation drives the rotation of moving knife column, moving knife motor
The revolving speed ratio of velocity of rotation and moving knife column is 300-350, and the rotational angle of moving knife column is 0-95 degree；Current sensor is set in
On moving knife bar, the first induced current when moving knife bar charges in current sensor is not less than 30A, is arranged on current sensor
Have an insulating layer, insulating layer be include the linen-cotton layer with a thickness of 3-4mm as inner layer, the modeling with a thickness of 5-8mm as middle layer
The bed of material, the ceramic layer for being greater than 1cm as the thickness of outer layer, the first electromagnetic lock are arranged in moving knife column upper end, and current sensor is secondary
First coil in side and the first electromagnetic lock is connected to closed circuit, and the first induced current acts the first electromagnetic lock, and first
The pulling force or thrust that 50N-70N is generated on first lock tongue of electromagnetic lock are enclosed with ceramic layer in the outside of the first electromagnetic lock, and first
The upper end of the first lock tongue connection moving knife latch mechanism of electromagnetic lock, the lower end of the moving knife latch mechanism is connected to moving knife bar lower part, moving knife
Latch mechanism is used to lock the disconnection movement of moving knife bar；The resistance value that moving knife locks upper and lower ends is greater than 1500M Ω and its upper and lower ends
Distance is greater than 1.8m；
Earthing knife-switch lock cell, including ground knife bar, cutter shaft, earthing knife-switch motor, quiet tool post, quiet cutter head, voltage sensor, second
Electromagnetic lock and earthing knife-switch latch mechanism；Ground knife bar is by the way that in earthing knife-switch axis connection to switch frame, ground knife bar can be around ground cutter shaft by horizontal direction
It turns to vertical direction and is connect with the earthing knife-switch interface on quiet cutter head, the height of quiet cutter head is 1.9m-2.1m, the distance of quiet tool post
The distance of moving knife column is 2-2.2m, and the moving knife interface and moving knife bar on quiet cutter head are contour, end and the moving knife interface phase of moving knife bar
Cooperation；The earthing knife-switch motor that power is 30kw-35kw is set at ground cutter shaft and earthing knife-switch motor is for rotationally knife bar, earthing knife-switch electricity
The shaft of machine and the rotating ratio of earthing knife-switch are 310-330, and the length of ground knife bar is 2m -2.2m, and the exhausted of black is cased on ground knife bar
Edge rubber layer, ground knife bar are 0-92 degree around the rotational angle of ground cutter shaft；It is equipped with voltage sensor in quiet tool post upper end, which passes
The second coil in the secondary side of sensor and the second electromagnetic lock is connected to closed circuit, and voltage sensor is able to detect Jing Daotouchu
Voltage and in its second coil of secondary side generate 50A-60A the second induced current, second induced current enter second
After electromagnetic lock, the second coil in the second electromagnetic lock is charged, and generates electromagnetic force, electromagnetic force on the second iron core of the second electromagnetic lock
The second lock tongue movement of the two the second electromagnetic locks is pulled or pushes, the second lock tongue connects the upper end of earthing knife-switch latch mechanism, the earthing knife-switch lock machine
The movement of the lower end locking earthing knife-switch of structure, earthing knife-switch latch mechanism is locked on switch frame, the resistance of the earthing knife-switch latch mechanism upper and lower ends
It is greater than 1.8m greater than the distance of 2000M Ω and its upper and lower ends；
Interlocking unit, including several moving knife connecting rods, earthing knife-switch connecting rod, self-lock rod and self-fastening button；The disconnecting switch of three-phase
Moving knife latch mechanism between connected with moving knife connecting rod, moving knife connecting rod and composition three or more, moving knife lock triangle mechanisms,
Each side side length of the triangle is all not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife
Column enables the moving knife column of disconnecting switch to move at the same time；It is connected between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase by earthing knife-switch
Bar connection, the earthing knife-switch connecting rod are connected at ground cutter shaft and the ipsilateral ground cutter shaft of the disconnecting switch of three-phase are connected, earthing knife-switch connection
Bar is fixed by flat key and ground cutter shaft；It is horizontally arranged with self-lock rod on the switch frame of disconnecting switch, it is each at the both ends of self-lock rod
It is flexibly connected a self-fastening button, the self-fastening button of one end is set to moving knife column lower part and is used to moving knife column being fixed to switch frame, separately
The self-fastening button of one end is set at ground cutter shaft for locking ground cutter shaft movement, close earthing knife-switch latch mechanism and moving knife latch mechanism can not simultaneously
It closes.
, can be not only mutually indepedent but also interrelated by each unit modularization of disconnecting switch due to above system, it can
Effectively avoid chain reaction caused by malfunction between unit, disconnecting switch enable effectively to cooperate, thus make every
Leaving pass good can operate, non-interference, and cooperate two-by-two, improve safety and the locking security of device.In addition, each
Rational Parameters used in a unit, had not only met the power grid security regulation of country, but also can reach the disconnecting switch safety of optimization
The characteristics of property.
Further, the control method of the disconnecting switch：
（（1）, disconnecting switch work normally when, current sensor senses electric current on moving knife bar, at this point, in current sense
The first induced current that 30A-40A is generated in the secondary first coil of device acts on the first electromagnetic lock through conducting wire；First electromagnetism
In lock, the electric current on electric current induction first coil band；
（2）, 30A-40A the first induced current charge the first coil in the first electromagnetic lock, first coil is wound
The first iron core generate magnetic induction intensity be 500T-600T；Make the movement of the first lock tongue of moving knife can not to lock moving knife unit
Complete disconnection movement；
（3）, the first iron core band magnetic field after, under magneticaction pull or push the first electromagnetic lock the first lock tongue, first
By the pulling force of 50N-70N or thrust on lock tongue；
（4）, the first lock tongue pull or push moving knife latch mechanism rise or fall, movement distance be greater than 3cm, moving knife lock
Moving knife column is locked on switch frame and is locked as closed state by the lower end of mechanism；
（5）, after the electric current in disconnecting switch is disconnected, the first induced current on current sensor disappears, without first
Induced current enters in the first electromagnetic lock, and the power-off of the first electromagnetic lock, the first lock tongue of the first electromagnetic lock is in its first spring 20-
Under the elastic force effect of 30N, the first lock tongue resets to unlocked position, while the first lock tongue pushes or pull on the movement of moving knife latch mechanism simultaneously
Moving knife column is unlocked；
（6）, the disconnecting switch moving knife bar when being in operating position or open position, voltage sensor senses quiet cutter head
The upper alternating voltage over the ground with greater than 10kv forms the second induced current of 10A-20A in the secondary side of voltage sensor；
（7）, the second induced current enter the second electromagnetic lock after, flow through the second coil in the second electromagnetic lock and in the second line
Magnetic field is generated on circle, which is conducted by the second iron core wound by the second coil, and the magnetic induction on the second iron core is strong at this time
Degree is 300T-450T；Magnetic force on second iron core pulls on or pushes the second lock tongue of the second electromagnetic lock to act；
（8）, the second lock tongue acted on the earthing knife-switch latch mechanism being connected on the second lock tongue the pulling force or thrust of 30-40N；Ground
Knife latch mechanism moves up or down under the action of pulling force or thrust, and the distance of movement is greater than 5cm；
（9）, earthing knife-switch latch mechanism lower end the lower end of the movement of moving knife column locking or earthing knife-switch latch mechanism is passed through into gear
Structure makes moving knife column be locked as off-state；
（10）, when the voltage drop on the quiet cutter head of disconnecting switch down to allow close earthing knife-switch voltage value when, voltage sensor
It can not sense that the alternating voltage over the ground on quiet cutter head or the voltage-to-ground on its quiet cutter head meet the requirement of closure earthing knife-switch, voltage
The second induced current of secondary side of sensor disappears or reduces, and the magnetic induction intensity of the second coil reduces in the second electromagnetic lock, the
Two iron cores reset the elastic force of the first spring to the pulling force or thrust of the second lock tongue lower than the second lock tongue, and the size of the elastic force is 15N-
20N, the second lock tongue reset under the elastic force effect for resetting the first spring, and the second lock tongue drives the movement of earthing knife-switch latch mechanism, earthing knife-switch lock
Cutter shaft unlocks over the ground for the lower end of mechanism；
（11）, when the moving knife column of moving knife latch mechanism needs rotational action, control by disconnecting switch electric current drop zero, three
Be isolated switch on moving knife latch mechanism unlock, three moving knife latch mechanisms under the action of moving knife connecting rod simultaneously move up or under
It moves, the triangular structure of moving knife connecting rod and moving knife latch mechanism composition can reinforce the degree of stability of its structure moving knife, make three
The disconnecting switch of phase unlocks simultaneously or locking；
（12）, when the moving knife column of disconnecting switch turns to open position, moving knife column, which pulls, is set to the of moving knife column lower end
One self-fastening button, pulling force or thrust of first self-fastening button to self-lock rod effect 50N-80N；The self-lock rod other end is set at ground cutter shaft
The second self-fastening button moved under pulling force or thrust, and over the ground cutter shaft unlock；
（13）, interlocking unit and earthing knife-switch lock cell be over the ground after cutter shaft unlock, when the earthing knife-switch of three-phase isolation switch needs
When closed action, the ground knife bar of three-phase is rotated up simultaneously under the action of earthing knife-switch connecting rod, until earthing knife-switch upper end and quiet cutter head
On earthing knife-switch interface connection；
（14）, earthing knife-switch close to closed state when, the second self-fastening button movement of earthing knife-switch lower end is pulled or is pushed away with the power of 50N-80N
Dynamic self-lock rod, the first self-fastening button positioned at moving knife column lower end acts under the action of the pulling force of self-lock rod or thrust, under moving knife column
Disconnecting switch is locked as off-state by first self-fastening button at end；
（15）, local knife bar is when being located at open position, in disconnecting switch closing course, disconnecting switch drive below the
The movement of two self-fastening buttons, the second self-fastening button act self-lock rod with the pulling force or thrust of 50N-80N, second below ground cutter shaft
Earthing knife-switch lever lock is set to off-state by self-fastening button, while earthing knife-switch lock cell detects on quiet cutter head with alternating voltage over the ground, moves
Knife lock cell further locks ground cutter shaft.
The circuit length and complexity of lock cell can be reduced, is kept away due to the above method due to using the above method
It is too long and cause error signal or reduce the influence of the safety of requirement or lock cell of the circuit complexity to connection to exempt from circuit,
Its route is converted to actuating mechanism above moving knife column, when electric current being avoided to transmit downwards, causes high pressure because insulating properties is bad
Dangerous or ground connection danger, while electromagnetic mechanism being enable rapidly to act, the accuracy of electromagnetic lock mechanism is improved, mistake is avoided
False release or lock out action caused by error signal.It can be realized the alternate integrating action of disconnecting switch, while realizing isolation
Mechanical latching between the moving knife and earthing knife-switch of switch, security risk caused by effectively preventing moving knife and earthing knife-switch to be closed at, energy
Enough effective alternate safeties and uniformity for improving disconnecting switch, while enhancing the safety of power grid.It can be realized and keep apart
The alternate integrating action closed, while realizing the mechanical latching between the moving knife of disconnecting switch and earthing knife-switch, effectively prevent moving knife and
Security risk caused by earthing knife-switch is closed at can effectively improve the alternate safety and uniformity of disconnecting switch, increase simultaneously
The safety of forceful electric power net.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1, the locking device structure of the disconnecting switch is simple, easy for installation, low in cost, is easy to reequip；In addition this to set
Meter, can by the movable cutter mechanism of disconnecting switch, cutter mechanism realize safety locking, avoid belt current disconnect earthing knife-switch, electrification closure
The case where earthing knife-switch, occurs.The simultaneously safety interlock of cutter mechanism and movable cutter mechanism guarantees that the two can not be closed at.
2, the locking device has filled up the defect of existing disconnecting switch design, enhances the security performance of disconnecting switch；Essence
The control circuit of simple blocking device avoids circuit too long or crosses security risk caused by auxiliary, using relatively reliable machine
The case where tool mechanism, effectively avoids control circuit from powering off, and causes disconnecting switch that can not protect.
3, the locking device of the disconnecting switch is avoided because of error signal or faulty operation, and caused by equipment, the person,
The generation of the case where power grid accident.
4, the locking device of the disconnecting switch is simple and easy, can be reequiped on the isolated switchgear with installation,
With good easy generalization.
5, the locking device is simple with circuit structure, and route is short, avoids long distance signal transmission to signaling security
It influences.
6, the locking means, exquisite composition can greatly guarantee disconnecting switch not because of maloperation or error signal
Influence electric network security.
Detailed description of the invention
Fig. 1 is the disconnecting switch anti-error system structure chart that 110kv power grid is used in the present invention；
It is marked in figure：1- switch frame, the ground 2- cutter mechanism, the ground 21- knife bar, the ground 22- cutter shaft, 23- earthing knife-switch electromagnetic mechanism, 24-
Earthing knife-switch lock tongue, the quiet cutter mechanism of 3-, the quiet tool post of 31-, 32- voltage sensor, the quiet cutter head of 33-, 4- movable cutter mechanism, 41- moving knife bar,
42- moving knife column, 43- current sensor, 44- moving knife electromagnetic mechanism, 45- moving knife lock tongue, 46- moving knife motor.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Specific embodiment 1：
As shown in Figure 1,
The locking system of disconnecting switch disclosed by the invention, including：
Moving knife lock cell, including 10kw-15kw moving knife motor, the moving knife column of 2m-2.2m long, 4m-4.5m long moving knife bar,
Current sensor, the first electromagnetic lock and moving knife latch mechanism；Moving knife column is movably connected on switch frame, and moving knife bar is horizontally installed on
The top of moving knife column connects moving knife motor in the lower part of moving knife column, and moving knife motor rotation drives the rotation of moving knife column, moving knife motor
The revolving speed ratio of velocity of rotation and moving knife column is 300-350, and the rotational angle of moving knife column is 0-95 degree；Current sensor is set in
On moving knife bar, the first induced current when moving knife bar charges in current sensor is not less than 30A, is arranged on current sensor
Have an insulating layer, insulating layer be include the linen-cotton layer with a thickness of 3-4mm as inner layer, the modeling with a thickness of 5-8mm as middle layer
The bed of material, the ceramic layer for being greater than 1cm as the thickness of outer layer, the first electromagnetic lock are arranged in moving knife column upper end, and current sensor is secondary
First coil in side and the first electromagnetic lock is connected to closed circuit, and the first induced current acts the first electromagnetic lock, and first
The pulling force or thrust that 50N-70N is generated on first lock tongue of electromagnetic lock are enclosed with ceramic layer in the outside of the first electromagnetic lock, and first
The upper end of the first lock tongue connection moving knife latch mechanism of electromagnetic lock, the lower end of the moving knife latch mechanism is connected to moving knife bar lower part, moving knife
Latch mechanism is used to lock the disconnection movement of moving knife bar；The resistance value that moving knife locks upper and lower ends is greater than 1500M Ω and its upper and lower ends
Distance is greater than 1.8m；
Earthing knife-switch lock cell, including ground knife bar, cutter shaft, earthing knife-switch motor, quiet tool post, quiet cutter head, voltage sensor, second
Electromagnetic lock and earthing knife-switch latch mechanism；Ground knife bar is by the way that in earthing knife-switch axis connection to switch frame, ground knife bar can be around ground cutter shaft by horizontal direction
It turns to vertical direction and is connect with the earthing knife-switch interface on quiet cutter head, the height of quiet cutter head is 1.9m-2.1m, the distance of quiet tool post
The distance of moving knife column is 2-2.2m, and the moving knife interface and moving knife bar on quiet cutter head are contour, end and the moving knife interface phase of moving knife bar
Cooperation；The earthing knife-switch motor that power is 30kw-35kw is set at ground cutter shaft and earthing knife-switch motor is for rotationally knife bar, earthing knife-switch electricity
The shaft of machine and the rotating ratio of earthing knife-switch are 310-330, and the length of ground knife bar is 2m -2.2m, and the exhausted of black is cased on ground knife bar
Edge rubber layer, ground knife bar are 0-92 degree around the rotational angle of ground cutter shaft；It is equipped with voltage sensor in quiet tool post upper end, which passes
The second coil in the secondary side of sensor and the second electromagnetic lock is connected to closed circuit, and voltage sensor is able to detect Jing Daotouchu
Voltage and in its second coil of secondary side generate 50A-60A the second induced current, second induced current enter second
After electromagnetic lock, the second coil in the second electromagnetic lock is charged, and generates electromagnetic force, electromagnetic force on the second iron core of the second electromagnetic lock
The second lock tongue movement of the two the second electromagnetic locks is pulled or pushes, the second lock tongue connects the upper end of earthing knife-switch latch mechanism, the earthing knife-switch lock machine
The movement of the lower end locking earthing knife-switch of structure, earthing knife-switch latch mechanism is locked on switch frame, the resistance of the earthing knife-switch latch mechanism upper and lower ends
It is greater than 1.8m greater than the distance of 2000M Ω and its upper and lower ends；
Interlocking unit, including several moving knife connecting rods, earthing knife-switch connecting rod, self-lock rod and self-fastening button；The disconnecting switch of three-phase
Moving knife latch mechanism between connected with moving knife connecting rod, moving knife connecting rod and composition three or more, moving knife lock triangle mechanisms,
Each side side length of the triangle is all not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife
Column enables the moving knife column of disconnecting switch to move at the same time；It is connected between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase by earthing knife-switch
Bar connection, the earthing knife-switch connecting rod are connected at ground cutter shaft and the ipsilateral ground cutter shaft of the disconnecting switch of three-phase are connected, earthing knife-switch connection
Bar is fixed by flat key and ground cutter shaft；It is horizontally arranged with self-lock rod on the switch frame of disconnecting switch, it is each at the both ends of self-lock rod
It is flexibly connected a self-fastening button, the self-fastening button of one end is set to moving knife column lower part and is used to moving knife column being fixed to switch frame, separately
The self-fastening button of one end is set at ground cutter shaft for locking ground cutter shaft movement, close earthing knife-switch latch mechanism and moving knife latch mechanism can not simultaneously
It closes.
, can be not only mutually indepedent but also interrelated by each unit modularization of disconnecting switch due to above system, it can
Effectively avoid chain reaction caused by malfunction between unit, disconnecting switch enable effectively to cooperate, thus make every
Leaving pass good can operate, non-interference, and cooperate two-by-two, improve safety and the locking security of device.In addition, each
Rational Parameters used in a unit, had not only met the power grid security regulation of country, but also can reach the disconnecting switch safety of optimization
The characteristics of property.
Specific embodiment 2：
Based on the locking system of 1 disconnecting switch of embodiment, the control method of disconnecting switch：
（1）, disconnecting switch work normally when, current sensor senses electric current on moving knife bar, at this point, in current sensor
Secondary first coil in generate 30A-40A the first induced current acted on the first electromagnetic lock through conducting wire；First electromagnetic lock
In, the electric current on electric current induction first coil band；
（2）, 30A-40A the first induced current charge the first coil in the first electromagnetic lock, first coil is wound
The first iron core generate magnetic induction intensity be 500T-600T；Make the movement of the first lock tongue of moving knife can not to lock moving knife unit
Complete disconnection movement；
（3）, the first iron core band magnetic field after, under magneticaction pull or push the first electromagnetic lock the first lock tongue, first
By the pulling force of 50N-70N or thrust on lock tongue；
（4）, the first lock tongue pull or push moving knife latch mechanism rise or fall, movement distance be greater than 3cm, moving knife lock
Moving knife column is locked on switch frame and is locked as closed state by the lower end of mechanism；
（5）, after the electric current in disconnecting switch is disconnected, the first induced current on current sensor disappears, without first
Induced current enters in the first electromagnetic lock, and the power-off of the first electromagnetic lock, the first lock tongue of the first electromagnetic lock is in its first spring 20-
Under the elastic force effect of 30N, the first lock tongue resets to unlocked position, while the first lock tongue pushes or pull on the movement of moving knife latch mechanism simultaneously
Moving knife column is unlocked；
（6）, the disconnecting switch moving knife bar when being in operating position or open position, voltage sensor senses quiet cutter head
The upper alternating voltage over the ground with greater than 10kv forms the second induced current of 10A-20A in the secondary side of voltage sensor；
（7）, the second induced current enter the second electromagnetic lock after, flow through the second coil in the second electromagnetic lock and in the second line
Magnetic field is generated on circle, which is conducted by the second iron core wound by the second coil, and the magnetic induction on the second iron core is strong at this time
Degree is 300T-450T；Magnetic force on second iron core pulls on or pushes the second lock tongue of the second electromagnetic lock to act；
（8）, the second lock tongue acted on the earthing knife-switch latch mechanism being connected on the second lock tongue the pulling force or thrust of 30-40N；Ground
Knife latch mechanism moves up or down under the action of pulling force or thrust, and the distance of movement is greater than 5cm；
（9）, earthing knife-switch latch mechanism lower end the lower end of the movement of moving knife column locking or earthing knife-switch latch mechanism is passed through into gear
Structure makes moving knife column be locked as off-state；
（10）, when the voltage drop on the quiet cutter head of disconnecting switch down to allow close earthing knife-switch voltage value when, voltage sensor
It can not sense that the alternating voltage over the ground on quiet cutter head or the voltage-to-ground on its quiet cutter head meet the requirement of closure earthing knife-switch, voltage
The second induced current of secondary side of sensor disappears or reduces, and the magnetic induction intensity of the second coil reduces in the second electromagnetic lock, the
Two iron cores reset the elastic force of the first spring to the pulling force or thrust of the second lock tongue lower than the second lock tongue, and the size of the elastic force is 15N-
20N, the second lock tongue reset under the elastic force effect for resetting the first spring, and the second lock tongue drives the movement of earthing knife-switch latch mechanism, earthing knife-switch lock
Cutter shaft unlocks over the ground for the lower end of mechanism；
（11）, when the moving knife column of moving knife latch mechanism needs rotational action, control by disconnecting switch electric current drop zero, three
Be isolated switch on moving knife latch mechanism unlock, three moving knife latch mechanisms under the action of moving knife connecting rod simultaneously move up or under
It moves, the triangular structure of moving knife connecting rod and moving knife latch mechanism composition can reinforce the degree of stability of its structure moving knife, make three
The disconnecting switch of phase unlocks simultaneously or locking；
（12）, when the moving knife column of disconnecting switch turns to open position, moving knife column, which pulls, is set to the of moving knife column lower end
One self-fastening button, pulling force or thrust of first self-fastening button to self-lock rod effect 50N-80N；The self-lock rod other end is set at ground cutter shaft
The second self-fastening button moved under pulling force or thrust, and over the ground cutter shaft unlock；
（13）, interlocking unit and earthing knife-switch lock cell be over the ground after cutter shaft unlock, when the earthing knife-switch of three-phase isolation switch needs
When closed action, the ground knife bar of three-phase is rotated up simultaneously under the action of earthing knife-switch connecting rod, until earthing knife-switch upper end and quiet cutter head
On earthing knife-switch interface connection；
（14）, earthing knife-switch close to closed state when, the second self-fastening button movement of earthing knife-switch lower end is pulled or is pushed away with the power of 50N-80N
Dynamic self-lock rod, the first self-fastening button positioned at moving knife column lower end acts under the action of the pulling force of self-lock rod or thrust, under moving knife column
Disconnecting switch is locked as off-state by first self-fastening button at end；
（15）, local knife bar is when being located at open position, in disconnecting switch closing course, disconnecting switch drive below the
The movement of two self-fastening buttons, the second self-fastening button act self-lock rod with the pulling force or thrust of 50N-80N, second below ground cutter shaft
Earthing knife-switch lever lock is set to off-state by self-fastening button, while earthing knife-switch lock cell detects on quiet cutter head with alternating voltage over the ground, moves
Knife lock cell further locks ground cutter shaft.
The circuit length and complexity of lock cell can be reduced, is kept away due to the above method due to using the above method
It is too long and cause error signal or reduce the influence of the safety of requirement or lock cell of the circuit complexity to connection to exempt from circuit,
Its route is converted to actuating mechanism above moving knife column 42, when electric current being avoided to transmit downwards, causes height because insulating properties is bad
Pressure danger or the danger of ground connection, while electromagnetic mechanism being enable rapidly to act, the accuracy of electromagnetic lock mechanism is improved, is avoided
False release or lock out action caused by error signal.Can be realized the alternate integrating action of disconnecting switch, at the same realize every
The mechanical latching between the moving knife of pass and earthing knife-switch is left, security risk caused by effectively preventing moving knife and earthing knife-switch to be closed at,
The alternate safety and uniformity of disconnecting switch can be effectively improved, while enhancing the safety of power grid.It can be realized isolation
The alternate integrating action of switch, while realizing the mechanical latching between the moving knife of disconnecting switch and earthing knife-switch, effectively prevent moving knife
Security risk caused by being closed at earthing knife-switch can effectively improve the alternate safety and uniformity of disconnecting switch, simultaneously
Enhance the safety of power grid.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1. the locking device structure of the disconnecting switch is simple, easy for installation, low in cost, it is easy to reequip；In addition this to set
Meter, can by the movable cutter mechanism 4 of disconnecting switch, cutter mechanism 2 realize safety locking, avoid belt current disconnect earthing knife-switch, electrification close
The case where closing earthing knife-switch occurs.The simultaneously safety interlock of cutter mechanism 2 and movable cutter mechanism 4 guarantees that the two can not be closed at.
2. the locking device has filled up the defect of existing disconnecting switch design, the security performance of disconnecting switch is enhanced；Essence
The control circuit of simple blocking device avoids circuit too long or crosses security risk caused by auxiliary, using relatively reliable machine
The case where tool mechanism, effectively avoids control circuit from powering off, and causes disconnecting switch that can not protect.
3. the locking device of the disconnecting switch is avoided because of error signal or faulty operation, and caused by equipment, the person,
The generation of the case where power grid accident.
4. the locking device of the disconnecting switch is simple and easy, can be reequiped on the isolated switchgear with installation,
With good easy generalization.
5. the locking device is simple with circuit structure, route is short, avoids long distance signal transmission to signaling security
It influences.
6. the locking means, exquisite composition can greatly guarantee disconnecting switch not because of maloperation or error signal
Influence electric network security.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (1)
1. a kind of disconnecting switch anti-error system for 110kV power grid, which is characterized in that including：
Moving knife lock cell, including 10kw-15kw moving knife motor, the moving knife column of 2m-2.2m long, 4m-4.5m long moving knife bar, electric current
Sensor, the first electromagnetic lock and moving knife latch mechanism；Moving knife column is movably connected on switch frame, and moving knife bar is horizontally installed on moving knife
The top of column connects moving knife motor in the lower part of moving knife column, and moving knife motor rotation drives the rotation of moving knife column, the rotation of moving knife motor
The revolving speed ratio of speed and moving knife column is 300-350, and the rotational angle of moving knife column is 0-95 degree；Current sensor is set in moving knife
On bar, the first induced current when moving knife bar charges in current sensor is not less than 30A, is provided on current sensor absolutely
Edge layer, insulating layer be include as inner layer with a thickness of 3-4mm linen-cotton layer, as middle layer with a thickness of 5-8mm plastic layer,
It is greater than the ceramic layer of 1cm as the thickness of outer layer, the setting of the first electromagnetic lock is in moving knife column upper end, current sensor secondary side and the
First coil in one electromagnetic lock is connected to closed circuit, and the first induced current acts the first electromagnetic lock, the first electromagnetic lock
The first lock tongue on generate 50N-70N pulling force or thrust, be enclosed with ceramic layer, the first electromagnetic lock in the outside of the first electromagnetic lock
The first lock tongue connection moving knife latch mechanism upper end, the lower end of the moving knife latch mechanism is connected to moving knife bar lower part, moving knife latch mechanism
Disconnection for locking moving knife bar acts；The resistance value that moving knife locks upper and lower ends is greater than 1500M Ω and the distance of its upper and lower ends is big
In 1.8m；
Earthing knife-switch lock cell, including ground knife bar, cutter shaft, earthing knife-switch motor, quiet tool post, quiet cutter head, voltage sensor, the second electromagnetism
Lock and earthing knife-switch latch mechanism；Ground knife bar is by the way that in earthing knife-switch axis connection to switch frame, ground knife bar can be rotated around ground cutter shaft by horizontal direction
Connect to vertical direction and with the earthing knife-switch interface on quiet cutter head, the height of quiet cutter head is 1.9m-2.1m, quiet tool post apart from moving knife
The distance of column is 2-2.2m, and the moving knife interface and moving knife bar on quiet cutter head are contour, and the end of moving knife bar is matched with moving knife interface；
The earthing knife-switch motor that power is 30kw-35kw is set at ground cutter shaft and earthing knife-switch motor is used for rotationally knife bar, the earthing knife-switch motor
The rotating ratio of shaft and earthing knife-switch is 310-330, and the length of ground knife bar is 2m -2.2m, and the insulation rubber of black is cased on ground knife bar
Glue-line, ground knife bar are 0-92 degree around the rotational angle of ground cutter shaft；Voltage sensor, the voltage sensor are equipped in quiet tool post upper end
Secondary side and the second electromagnetic lock in the second coil be connected to closed circuit, voltage sensor is able to detect the electricity of Jing Daotouchu
The second induced current of 50A-60A is pressed and generates in its second coil of secondary side, which enters the second electromagnetism
After lock, the second coil in the second electromagnetic lock is charged, and electromagnetic force is generated on the second iron core of the second electromagnetic lock, and electromagnetic force pulls
Or the second lock tongue movement of the two the second electromagnetic locks is pushed, the second lock tongue connects the upper end of earthing knife-switch latch mechanism, the earthing knife-switch latch mechanism
Lower end locks the movement of earthing knife-switch, earthing knife-switch latch mechanism is locked on switch frame, the resistance of the earthing knife-switch latch mechanism upper and lower ends is greater than
The distance of 2000M Ω and its upper and lower ends is greater than 1.8m；
Interlocking unit, including several moving knife connecting rods, earthing knife-switch connecting rod, self-lock rod and self-fastening button；The disconnecting switch of three-phase is moved
It is connected between knife latch mechanism with moving knife connecting rod, moving knife connecting rod and composition three, moving knife lock or more triangle mechanisms, this three
Angular each side side length is all not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife column,
The moving knife column of disconnecting switch is set to move at the same time；Connected between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase by earthing knife-switch connecting rod
It connects, which is connected at ground cutter shaft and the ipsilateral ground cutter shaft of the disconnecting switch of three-phase is connected, and earthing knife-switch connecting rod is logical
Flat key is crossed to fix with ground cutter shaft；It is horizontally arranged with self-lock rod on the switch frame of disconnecting switch, in each activity in the both ends of self-lock rod
A self-fastening button is connected, the self-fastening button of one end is set to moving knife column lower part and is used to moving knife column being fixed to switch frame, the other end
Self-fastening button be set to ground cutter shaft at for lock ground cutter shaft movement, be closed at earthing knife-switch latch mechanism and moving knife latch mechanism can not；
The control method of the disconnecting switch：
（1）, disconnecting switch work normally when, current sensor senses electric current on moving knife bar, at this point, the two of current sensor
The first induced current that 30A-40A is generated in secondary first coil acts on the first electromagnetic lock through conducting wire；In first electromagnetic lock,
Electric current incudes electric current on first coil band；
（2）, 30A-40A the first induced current charge the first coil in the first electromagnetic lock, first coil wound
The magnetic induction intensity that one iron core generates is 500T-600T；It is unable to complete the movement of the first lock tongue of moving knife to lock moving knife unit
Disconnection movement；
（3）, the first iron core band magnetic field after, under magneticaction pull or push the first electromagnetic lock the first lock tongue, the first lock tongue
On pulling force or thrust by 50N-70N；
（4）, the first lock tongue pull or push moving knife latch mechanism rise or fall, movement distance be greater than 3cm, moving knife latch mechanism
Lower end moving knife column is locked on switch frame and is locked as closed state；
（5）, after the electric current in disconnecting switch is disconnected, the first induced current on current sensor disappears, and no first incudes
Electric current enters in the first electromagnetic lock, and the power-off of the first electromagnetic lock, the first lock tongue of the first electromagnetic lock is its first spring 20-30N's
Under elastic force effect, the first lock tongue resets to unlocked position, while the first lock tongue pushes or pull on the movement of moving knife latch mechanism and to dynamic
Tool post unlock；
（6）, the disconnecting switch moving knife bar when being in operating position or open position, voltage sensor senses band on quiet cutter head
There is the alternating voltage over the ground greater than 10kv, forms the second induced current of 10A-20A in the secondary side of voltage sensor；
（7）, the second induced current enter the second electromagnetic lock after, flow through the second coil in the second electromagnetic lock and on the second coil
Magnetic field is generated, which is conducted by the second iron core wound by the second coil, and the magnetic induction intensity on the second iron core is at this time
300T-450T；Magnetic force on second iron core pulls on or pushes the second lock tongue of the second electromagnetic lock to act；
（8）, the second lock tongue acted on the earthing knife-switch latch mechanism being connected on the second lock tongue the pulling force or thrust of 30-40N；Earthing knife-switch lock
Mechanism moves up or down under the action of pulling force or thrust, and the distance of movement is greater than 5cm；
（9）, earthing knife-switch latch mechanism lower end the lower end of the movement of moving knife column locking or earthing knife-switch latch mechanism is made by linkage mechanism
Moving knife column is locked as off-state；
（10）, when the voltage drop on the quiet cutter head of disconnecting switch down to allow close earthing knife-switch voltage value when, voltage sensor can not
Sense that the alternating voltage over the ground on quiet cutter head or the voltage-to-ground on its quiet cutter head meet the requirement of closure earthing knife-switch, voltage sensor
The second induced current of secondary side of device disappears or reduces, and the magnetic induction intensity of the second coil reduces in the second electromagnetic lock, the second iron
Core resets the elastic force of the first spring to the pulling force or thrust of the second lock tongue lower than the second lock tongue, and the size of the elastic force is 15N-20N,
Second lock tongue resets under the elastic force effect for resetting the first spring, and the second lock tongue drives the movement of earthing knife-switch latch mechanism, earthing knife-switch latch mechanism
Lower end over the ground cutter shaft unlock；
（11）, when the moving knife column of moving knife latch mechanism needs rotational action, control by disconnecting switch electric current drop zero, three are separated by
The moving knife latch mechanism unlock shut is left, three moving knife latch mechanisms are moved up or are moved down simultaneously under the action of moving knife connecting rod,
Moving knife connecting rod and the triangular structure of moving knife latch mechanism composition can reinforce the degree of stability of its structure moving knife, make three-phase every
It leaves pass while unlocking or locking；
（12）, when the moving knife column of disconnecting switch turns to open position, moving knife column pull be set to moving knife column lower end first from
Lock, pulling force or thrust of first self-fastening button to self-lock rod effect 50N-80N；The be set at ground cutter shaft of the self-lock rod other end
Two self-fastening buttons move under pulling force or thrust, and cutter shaft unlocks over the ground；
（13）, interlocking unit and earthing knife-switch lock cell be over the ground after cutter shaft unlock, when the earthing knife-switch of three-phase isolation switch needs to be closed
When movement, the ground knife bar of three-phase is rotated up simultaneously under the action of earthing knife-switch connecting rod, until on earthing knife-switch upper end and quiet cutter head
The connection of earthing knife-switch interface；
（14）, earthing knife-switch close to closed state when, the second self-fastening button movement of earthing knife-switch lower end pull or push with the power of 50N-80N from
Locking bar, the first self-fastening button positioned at moving knife column lower end act under the action of the pulling force of self-lock rod or thrust, moving knife column lower end
Disconnecting switch is locked as off-state by the first self-fastening button；
（15）, local knife bar is when being located at open position, in disconnecting switch closing course, disconnecting switch drive below second oneself
Lock movement, the second self-fastening button act self-lock rod with the pulling force or thrust of 50N-80N, and second below ground cutter shaft is self-locking
Earthing knife-switch lever lock is set to off-state by button, while earthing knife-switch lock cell detects on quiet cutter head with alternating voltage over the ground, moving knife lock
Order member further locks ground cutter shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510674502.7A CN105225881B (en) | 2015-10-19 | 2015-10-19 | Disconnecting switch anti-error system for 110kV power grid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510674502.7A CN105225881B (en) | 2015-10-19 | 2015-10-19 | Disconnecting switch anti-error system for 110kV power grid |
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| Publication Number | Publication Date |
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| CN105225881A CN105225881A (en) | 2016-01-06 |
| CN105225881B true CN105225881B (en) | 2018-11-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201570424U (en) * | 2009-12-09 | 2010-09-01 | 武汉钢铁(集团)公司 | Switch interlocking device of high-voltage isolating switch |
| US8593030B2 (en) * | 2010-07-09 | 2013-11-26 | Nikhil Mondal | Rotating electric machine for generating a constant frequency AC Power Supply from a variable speed primemover |
| CN202423057U (en) * | 2011-12-27 | 2012-09-05 | 苏州万龙电气集团股份有限公司 | Isolating switch device |
| CN103354191B (en) * | 2013-07-02 | 2016-04-13 | 鼎阳电力科技服务有限公司 | A kind of device preventing high voltage isolator on-load operation |
| CN205211649U (en) * | 2015-10-19 | 2016-05-04 | 夏烬楚 | A isolator prevent mistake system for 110kV electric wire netting |
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Effective date of registration: 20181019 Address after: 312030, fourth floor, building 1, north gate of Qixian international logistics center, Keqiao, Shaoxing, Zhejiang. Applicant after: Safe Technology Ltd of Zhejiang Address before: 610000 Sichuan Chengdu Wuhou District Longmen Lane 6 1 Building 2 unit 12 Applicant before: Xia Jinchu |
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