CN105206463B - A kind of false grounding prevention isolating switch for 110kV power grids - Google Patents
A kind of false grounding prevention isolating switch for 110kV power grids Download PDFInfo
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- CN105206463B CN105206463B CN201510674319.7A CN201510674319A CN105206463B CN 105206463 B CN105206463 B CN 105206463B CN 201510674319 A CN201510674319 A CN 201510674319A CN 105206463 B CN105206463 B CN 105206463B
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- 230000002265 prevention Effects 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 191
- 230000009471 action Effects 0.000 claims abstract description 21
- 210000002105 tongue Anatomy 0.000 description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000005611 electricity Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000006698 induction Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 230000007257 malfunction Effects 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 239000000686 essence Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
- H01H31/003—Earthing switches
-
- 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
- H01H31/04—Interlocking mechanisms
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Abstract
A kind of false grounding prevention isolating switch for 110kv power grids, it is characterised in that it includes switch frame, movable cutter mechanism, quiet cutter mechanism, cutter mechanism, moving knife electromagnetic mechanism, earthing knife-switch electromagnetic mechanism, moving knife lock linkage mechanism, earthing knife-switch lock linkage mechanism and closing self-locking mechanism.The safety of disconnecting switch can effectively be improved, by the way of mechanical latching, it ensure that the safety of isolating-switch locking, the possibility of disconnecting switch maloperation can be effectively reduced, it can be by locking isolating switch, avoid maloperation and caused by the person or property loss, it is disconnecting switch action when occurring to prevent failure or error signal because of control circuit, the case where avoiding that power grid is caused to be grounded.
Description
Technical field
The present invention relates to a kind of false grounding prevention isolating switchs for 110kV power grids.
Background technology
False grounding prevention isolating switch for 110kV power grids is that switch important in power plant and substation's electrical system is electric
Device, need to match with high-voltage circuitbreaker, and major function is：Ensure 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 grids
False grounding prevention isolating switch 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 will also be needed in high voltage distribution installation the part having a power failure with
Live part is reliably isolated, to ensure the safety of service work.The contact of false grounding prevention isolating switch for 110kV power grids
Whole is open in air, there is apparent cut-off point, disconnecting switch not to have arc-control device, therefore cannot be used for cutting 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 false grounding prevention isolating switch 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 use for 110kV power grids false grounding prevention isolating switch by running circuit from one
Busbar is switched on another busbar.
Present disconnecting switch is frequently used in each substation, the action of disconnecting switch be usually by console into
Row far distance controlled, the false grounding prevention isolating switch for 110kV power grids 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
Switch or the earthing knife-switch malfunction in disconnecting switch, cause serious danger, endanger power grid security.
Invention content
It is an object of the invention to：In view of the above problems, provide a kind of false ground for 110kV power grids every
Pass is left, locking device is set in disconnecting switch, when avoiding because of console far distance controlled, error signal is generated, uses
The safety of equipment is influenced in the false grounding prevention isolating switch malfunction of 110kV power grids, personnel's maloperation, controller is avoided to miss
Influence of the signal to disconnecting switch safety, improves the safety of power grid, avoids and keeps apart for the false ground of 110kV power grids
Influence of the malfunction to personal safety is closed, 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 false grounding prevention isolating switch for 110kV power grids, including switch frame, movable cutter mechanism,
Quiet cutter mechanism, cutter mechanism, moving knife electromagnetic mechanism, earthing knife-switch electromagnetic mechanism, moving knife lock linkage mechanism, earthing knife-switch lock linkage mechanism and
Closing self-locking mechanism, movable cutter mechanism, quiet cutter mechanism, cutter mechanism be located on switch frame, moving knife electromagnetic mechanism be arranged in moving knife machine
For locking movable cutter mechanism on structure, earthing knife-switch electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, and moving knife locks gear
Structure is connected on the ground cutter mechanism of the disconnecting switch of three-phase, and earthing knife-switch lock linkage mechanism is connected on the ground of the disconnecting switch homonymy of three-phase
On cutter mechanism, closing self-locking mechanism is set between the movable cutter mechanism and quiet cutter mechanism of disconnecting switch；Ground cutter mechanism, including earthing knife-switch
Bar, cutter shaft, earthing knife-switch motor, 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 earthing knife-switch interface, earthing knife-switch motor is set at ground cutter shaft for rotationally knife bar.
Further, moving knife electromagnetic mechanism, including current sensor, electromagnetic lock and moving knife latch mechanism, current sensor set
It is located on moving knife bar for incuding the electric current on moving knife bar, insulating layer is provided on current sensor, electromagnetic lock is set to dynamic
Tool post upper end, current sensor secondary side are connected to closed circuit with the coil in electromagnetic lock, and the lock tongue of electromagnetic lock connects moving knife
The upper end of latch mechanism, the lower end of the moving knife latch mechanism are connected to the lower part of moving knife bar, and moving knife latch mechanism is for locking moving knife bar
Disconnection acts；
Further, earthing knife-switch electromagnetic mechanism, including voltage sensor, electromagnetic lock and earthing knife-switch latch mechanism, voltage sensor and
Electromagnetic lock is respectively positioned on Jing Daotouchu, and the coil in the secondary side and electromagnetic lock of voltage sensor is connected to closed circuit, electromagnetic lock
Lock tongue be connected with earthing knife-switch latch mechanism upper end, the lower end of earthing knife-switch latch mechanism is connected at ground cutter shaft dynamic for locking the closure of earthing knife-switch
Make；
Further, moving knife locks linkage mechanism, and the moving knife latch mechanism of three disconnecting switch arranged side by side is passed through moving knife connecting rod
Connection, enables its moving knife latch mechanism to lock or unlock simultaneously；Earthing knife-switch locks linkage mechanism, by the ground of three disconnecting switch arranged side by side
Knife latch mechanism is connected by earthing knife-switch connecting rod, its earthing knife-switch latch mechanism is enable to lock or unlock simultaneously；Closing self-locking mechanism, including from
Locking bar, self-fastening button, self-lock rod both ends are respectively provided with a self-fastening button, and the self-fastening button of one end is set to moving knife column lower part, the other end from
Lock is set to earthing knife-switch buckle, the self-locking mechanism for locking ground cutter mechanism or movable cutter mechanism, make ground cutter mechanism and movable cutter mechanism without
Method is closed at.
Further, movable cutter mechanism, including moving knife motor, moving knife column, moving knife bar；The setting of moving knife column vertical movable is switching
In the middle part of frame or end, moving knife bar are horizontally installed on the top of moving knife column, and moving knife motor is connected in the lower part of moving knife column；Quiet knife machine
Structure, including quiet tool post and quiet cutter head, quiet tool post are vertically arranged to the end of switch frame, and quiet cutter head is located at the top of quiet tool post；It is quiet
Moving knife interface and earthing knife-switch interface are provided on cutter head.
Due to above structure, the safety that can effectively improve disconnecting switch ensure that by the way of mechanical latching
The safety of isolating-switch locking can effectively reduce the possibility of disconnecting switch maloperation, can keep away locking isolating switch
Exempt from maloperation and caused by the person or property loss, be disconnecting switch when preventing failure or error signal because of control circuit from occurring
Action, the case where avoiding that power grid is caused to be grounded.
Further, the locking system of disconnecting switch, including：
Moving knife lock cell, including moving knife motor, moving knife column, long moving knife bar, current sensor, electromagnetic lock and moving knife lock
Mechanism；Moving knife power of motor 10kW-15kW, power column length 2m-2.2m, the long 4m-4.5m of moving knife bar, the setting of moving knife column vertical movable
In the middle part of switch frame or end, moving knife bar are horizontally installed on the top of moving knife column, and moving knife motor is connected in the lower part of moving knife column, should
The rotation of moving knife motor drives moving knife column to rotate, and the rotating speed ratio of moving knife motor rotation speed and moving knife column is 300-350, moving knife column
Rotational angle be 0-95 degree；Current sensor is set on moving knife bar, induction when moving knife bar charges in current sensor
Electric current is not less than 30A, is provided with insulating layer on current sensor, insulating layer be include as the thickness of inner layer be 3-4mm's
Linen-cotton layer, plastic layer of the thickness for 5-8mm as middle level, the thickness as outer layer are more than the ceramic layer of 1cm, electromagnetic lock setting
In moving knife column upper end, current sensor secondary side is connected to closed circuit with the coil in electromagnetic lock, and induced current makes electromagnetic lock
It acts, the pulling force or thrust of 50N-70N is generated on the lock tongue of electromagnetic lock, ceramic layer, electromagnetism are enclosed in the outside of electromagnetic lock
The upper end of the lock tongue connection moving knife latch mechanism of lock, the lower end of the moving knife latch mechanism are connected to moving knife bar lower part, and moving knife latch mechanism is used
In the disconnection action of locking moving knife bar；The resistance value of moving knife lock upper and lower ends is more than 1500M Ω and the distance of its upper and lower ends is more 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, 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；It is equipped with voltage sensor, the voltage sensor in quiet tool post upper end
Secondary side and electromagnetic lock in coil be connected to closed circuit, voltage sensor can detect the voltage of Jing Daotouchu and at it
The induced current that 50A-60A is generated in second siding ring, after which enters electromagnetic lock, the coil electrification in electromagnetic lock,
Electromagnetic force is generated on the iron core of electromagnetic lock, electromagnetic force pulls or push the lock tongue action of electromagnetic lock, lock tongue to connect earthing knife-switch latch mechanism
Upper end, the earthing knife-switch latch mechanism lower end locking earthing knife-switch action, ground cutter mechanism is locked on switch frame, the earthing knife-switch latch mechanism
The resistance of upper and lower ends is more than 2000M Ω and the distance of its upper and lower ends is more 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 with moving knife connecting rod between knife latch mechanism, moving knife connecting rod forms three or more triangle mechanisms, the triangle with moving knife lock
Each side length of side all be not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife column, make isolation
The moving knife column of switch can act simultaneously；It is connected by earthing knife-switch connecting rod between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase, the ground
Knife connecting rod is connected at ground cutter shaft and by the ground cutter shaft series connection of the disconnecting switch homonymy of three-phase, and earthing knife-switch connecting rod passes through flat key and earthing knife-switch
Axis is fixed；It is horizontally arranged with self-lock rod on the switch frame of disconnecting switch, in respectively one self-locking of flexible connection of the both ends of self-lock rod
Button, the self-fastening button of one end are set to moving knife column lower part and are used to moving knife column being fixed to switch frame, and the self-fastening button of the other end is set to
For locking ground cutter shaft action at ground cutter shaft, this makes ground cutter mechanism and movable cutter mechanism that can not be closed at.
, can be not only mutual indepedent but also interrelated by each unit modularization of disconnecting switch due to above system, it can
Chain reaction caused by the effective malfunction avoided between unit, enables disconnecting switch effectively to coordinate, to make every
Pass is left good to operate, it is non-interference, and coordinate 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 earthing knife-switch lock cell：
（1）, 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 more than 10kV forms the induced current of 10A-20A in the secondary side of voltage sensor；
（2）, after induced current enters electromagnetic lock, flow through the coil in electromagnetic lock and generate magnetic field on coil, the magnetic field
By the iron core conduction wound by coil, the magnetic induction intensity on iron core is 300T-450T at this time；Magnetic force on iron core pulls on
Or push the lock tongue action of electromagnetic lock；
（3）, lock tongue acted on the earthing knife-switch latch mechanism being connected on lock tongue the pulling force or thrust of 30-40N；Earthing knife-switch latch mechanism
It is moved up or down under the action of pulling force or thrust, the distance of movement is more than 5cm；
（4）, earthing knife-switch latch mechanism lower end the lower end of the action 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；
（5）, when the voltage drop on the quiet cutter head of disconnecting switch down to allow close earthing knife-switch voltage value when, voltage sensor without
Method senses that the voltage-to-ground on alternating voltage over the ground or its quiet cutter head on quiet cutter head meets the requirement for being closed earthing knife-switch, and voltage passes
The secondary side induced current of sensor disappears or reduces, and the magnetic induction intensity of electromagnetic lock interior loop reduces, pulling force of the iron core to lock tongue
Or thrust is less than the elastic force of lock tongue resetting spring, the size of the elastic force is 15N-20N, and lock tongue is under the elastic force effect of resetting spring
It resets, lock tongue drives the action of earthing knife-switch latch mechanism, and cutter shaft unlocks over the ground for the lower end of earthing knife-switch latch mechanism.
Due to the above method, after disconnecting switch can be avoided to disconnect, the residual voltage on quiet cutter head with disconnecting switch alternatively, be connected
Change pressure transformer or other have storage Electricity Functional the anti-power transmissions of component and the feelings of the earthing knife-switch of disconnecting switch can not be closed
Condition occurs, and can effectively distinguish the voltage for the closure earthing knife-switch for capableing of safety, ensures that the safety of earthing knife-switch is closed, prevents because of other electricity
Press the normal use of interference effect isolation knife.
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, of low 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 be closed
The case where earthing knife-switch, occurs.The simultaneously safety interlock of cutter mechanism and movable cutter mechanism ensures 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 long or crosses security risk caused by auxiliary, using relatively reliable machine
Tool mechanism, effectively avoids control circuit from powering off, the case where causing 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 practicable, can be reequiped on the isolated switchgear with installation,
With good easy generalization.
5, the locking device is simple with circuit structure, and circuit is short, avoids long distance signal transmission to signaling security
It influences.
6, the locking means, exquisite composition can greatly ensure disconnecting switch not because of maloperation or error signal
Influence electric network security.
Description of the drawings
Fig. 1 is the false grounding prevention isolating switch structure chart that 110kV power grids are used in the present invention；
It is marked in figure：1- switch frames, the ground 2- cutter mechanism, the ground 21- knife bar, the ground 22- cutter shaft, 23- earthing knife-switch electromagnetic mechanisms, 24-
Earthing knife-switch lock tongue, the quiet cutter mechanisms of 3-, the quiet tool posts of 31-, 32- voltage sensors, the quiet cutter heads of 33-, 4- movable cutter mechanisms, 41- moving knife bars,
42- moving knife columns, 43- current sensors, 44- moving knife electromagnetic mechanisms, 45- moving knife lock tongues, 46- moving knife motors.
Specific implementation mode
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be 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 invention discloses a kind of false grounding prevention isolating switchs for 110kV power grids, including switch frame 1, movable cutter mechanism
4, quiet cutter mechanism 3, cutter mechanism 2, moving knife electromagnetic mechanism 44, earthing knife-switch electromagnetic mechanism 23, moving knife lock linkage mechanism, earthing knife-switch lock linkage
Mechanism and closing self-locking mechanism, movable cutter mechanism 4, quiet cutter mechanism 3, cutter mechanism 2 be located on switch frame 1, moving knife electromagnetic mechanism 44
It is arranged in movable cutter mechanism 4 for locking movable cutter mechanism 4, earthing knife-switch electromagnetic mechanism 23 is arranged on quiet cutter mechanism 3 for locking earthing knife-switch
Mechanism 2, moving knife are locked on the ground cutter mechanism 2 for the disconnecting switch that linkage mechanism is connected on three-phase, and earthing knife-switch lock linkage mechanism is connected on three
On the ground cutter mechanism 2 of the disconnecting switch homonymy of phase, closing self-locking mechanism is set to the movable cutter mechanism 4 and quiet cutter mechanism 3 of disconnecting switch
Between.
Movable cutter mechanism 4, including moving knife motor 46, moving knife column 42, moving knife bar 41；The setting of 42 vertical movable of moving knife column is switching
1 middle part of frame or end, moving knife bar 41 are horizontally installed on the top of moving knife column 42, and moving knife motor is connected in the lower part of moving knife column 42
46；Quiet cutter mechanism 3, including quiet tool post 31 and quiet cutter head 33, quiet tool post 31 are vertically arranged to the end of switch frame 1, quiet cutter head 33
Positioned at the top of quiet tool post 31；Moving knife interface and earthing knife-switch interface are provided on quiet cutter head 33.
Ground cutter mechanism 2, including ground knife bar 21, cutter shaft 22, earthing knife-switch motor, ground knife bar 21 be connected to out by ground cutter shaft 22
It closes on frame 1, ground knife bar 21 can turn to vertical direction by horizontal direction around ground cutter shaft 22 and be connect with earthing knife-switch interface, earthing knife-switch motor
For rotationally knife bar 21 at ground cutter shaft 22；
Moving knife electromagnetic mechanism 44, including current sensor 43, electromagnetic lock and moving knife latch mechanism, current sensor 43 are arranged
For incuding the electric current on moving knife bar 41 on moving knife bar 41, insulating layer, electromagnetic lock setting are provided on current sensor 43
In 42 upper end of moving knife column, 43 secondary side of current sensor is connected to closed circuit, the lock tongue of electromagnetic lock with the coil in electromagnetic lock
The upper end of moving knife latch mechanism is connected, the lower end of the moving knife latch mechanism is connected to the portion of moving knife bar 41, and moving knife latch mechanism is for locking
The disconnection of moving knife bar 41 acts；
Earthing knife-switch electromagnetic mechanism 23, including voltage sensor 32, electromagnetic lock and earthing knife-switch latch mechanism, voltage sensor 32 and electricity
Magnetic padlock is respectively positioned at quiet cutter head 33, and the coil in the secondary side and electromagnetic lock of voltage sensor 32 is connected to closed circuit, electromagnetism
The lock tongue of lock is connected with earthing knife-switch latch mechanism upper end, and the lower end of earthing knife-switch latch mechanism is connected at ground cutter shaft 22 for locking closing for earthing knife-switch
Conjunction acts；
Moving knife locks linkage mechanism, and the moving knife latch mechanism of three disconnecting switch arranged side by side is connected by moving knife connecting rod, makes it
Moving knife latch mechanism can lock or unlock simultaneously；Earthing knife-switch locks linkage mechanism, by the earthing knife-switch latch mechanism of three disconnecting switch arranged side by side
It is connected by earthing knife-switch connecting rod, its earthing knife-switch latch mechanism is enable to lock or unlock simultaneously；Closing self-locking mechanism, including self-lock rod, from
Lock, self-lock rod both ends are respectively provided with a self-fastening button, and the self-fastening button of one end is set to 42 lower part of moving knife column, and the self-fastening button of the other end is set
In earthing knife-switch buckle, which makes ground cutter mechanism 2 and movable cutter mechanism 4 can not for locking ground cutter mechanism 2 or movable cutter mechanism 4
It is closed at.
Due to above structure, the safety that can effectively improve disconnecting switch ensure that by the way of mechanical latching
The safety of isolating-switch locking can effectively reduce the possibility of disconnecting switch maloperation, can keep away locking isolating switch
Exempt from maloperation and caused by the person or property loss, be disconnecting switch when preventing failure or error signal because of control circuit from occurring
Action, the case where avoiding that power grid is caused to be grounded.
Specific embodiment 2：
Based on the locking system for implementing 1 disconnecting switch, including：
Moving knife lock cell, including the moving knife column 42 of 10kW-15kW moving knife motor 46,2m-2.2m long, 4m-4.5m long are dynamic
Knife bar 41, current sensor 43, electromagnetic lock and the setting of 42 vertical movable of moving knife latch mechanism moving knife column are at 1 middle part of switch frame or end
Portion, moving knife bar 41 are horizontally installed on the top of moving knife column 42, connection moving knife motor 46, the moving knife motor in the lower part of moving knife column 42
46 rotations drive moving knife column 42 to rotate, and the rotating speed ratio of 46 velocity of rotation of moving knife motor and moving knife column 42 is 300-350, moving knife column
42 rotational angle is 0-95 degree；Current sensor 43 is set on moving knife bar 41, in current sensor when moving knife bar 41 charges
Induced current in 43 is not less than 30A, is provided with insulating layer on current sensor 43, insulating layer be include thickness as inner layer
Degree be 3-4mm linen-cotton layer, as middle level thickness be 5-8mm plastic layer, as outer layer thickness more than 1cm ceramics
Layer, electromagnetic lock setting are connected to closed circuit in 42 upper end of moving knife column, 43 secondary side of current sensor with the coil in electromagnetic lock,
Induced current makes electromagnetic lock act, and the pulling force or thrust of 50N-70N are generated on the lock tongue of electromagnetic lock, in the external packet of electromagnetic lock
It is wrapped with ceramic layer, the upper end of the 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 41
Lower part, moving knife latch mechanism are used to lock the disconnection action of moving knife bar 41；Moving knife lock upper and lower ends resistance value be more than 1500M Ω and its
The distance of upper and lower ends is more than 1.8m；
Earthing knife-switch lock cell, including ground knife bar 21, cutter shaft 22, earthing knife-switch motor, quiet tool post 31, quiet cutter head 33, voltage pass
Sensor 32, electromagnetic lock and earthing knife-switch latch mechanism；Ground knife bar 21 is connected to by ground cutter shaft 22 on switch frame 1, and ground knife bar 21 can be around ground
Cutter shaft 22 is turned to vertical direction by horizontal direction and is connect with the earthing knife-switch interface on quiet cutter head 33, and the height of quiet cutter head 33 is
The distance apart from moving knife column 42 of 1.9m-2.1m, quiet tool post 31 are 2-2.2m, the moving knife interface on quiet cutter head 33 and moving knife bar 41
Contour, the end of moving knife bar 41 is matched with moving knife interface；The earthing knife-switch motor that power is 30kW-35kW is set at ground cutter shaft 22 simultaneously
And earthing knife-switch motor, for rotationally knife bar 21, the shaft of the earthing knife-switch motor and the rotating ratio of earthing knife-switch are 310-330, ground knife bar 21
Length is 2m -2.2m, and the electro-insulating rubber layer of black, rotational angle of the ground knife bar 21 around ground cutter shaft 22 are cased on ground knife bar 21
For 0-92 degree；It is equipped with voltage sensor 32, the line in the secondary side and electromagnetic lock of the voltage sensor 32 in 31 upper end of quiet tool post
Circle is connected to closed circuit, and voltage sensor 32 can detect the voltage at quiet cutter head 33 and be generated in its second siding ring
The induced current of 50A-60A, after which enters electromagnetic lock, the coil electrification in electromagnetic lock, on the iron core of electromagnetic lock
Electromagnetic force is generated, electromagnetic force pulls or push the lock tongue action of electromagnetic lock, lock tongue to connect the upper end of earthing knife-switch latch mechanism, the earthing knife-switch lock machine
The action of the lower end locking earthing knife-switch of structure, ground cutter mechanism 2 is locked on switch frame 1, the resistance of the earthing knife-switch latch mechanism upper and lower ends
It is more than 1.8m more 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 is moved
It is connected with moving knife connecting rod between knife latch mechanism, moving knife connecting rod forms three or more triangle mechanisms, the triangle with moving knife lock
Each side length of side all be not less than 50cm；The moving knife connecting rod can make moving knife latch mechanism while lock or unlock moving knife column 42, make every
Leaving the moving knife column 42 of pass can act simultaneously；It is connected by earthing knife-switch connecting rod between the earthing knife-switch latch mechanism of the disconnecting switch of three-phase,
The earthing knife-switch connecting rod is connected at ground cutter shaft 22 and the ground cutter shaft 22 of the disconnecting switch homonymy of three-phase is connected, and earthing knife-switch connecting rod passes through flat
Key is fixed with ground cutter shaft 22；It is horizontally arranged with self-lock rod on the switch frame 1 of disconnecting switch, each activity connects at the both ends of self-lock rod
A self-fastening button is connect, the self-fastening button of one end is set to 42 lower part of moving knife column and is used to moving knife column 42 being fixed to switch frame 1, another
The self-fastening button at end is set at ground cutter shaft 22 and is acted for locking ground cutter shaft 22, this makes ground cutter mechanism 2 and movable cutter mechanism 4 can not be simultaneously
It is closed.
, can be not only mutual indepedent but also interrelated by each unit modularization of disconnecting switch due to above system, it can
Chain reaction caused by the effective malfunction avoided between unit, enables disconnecting switch effectively to coordinate, to make every
Pass is left good to operate, it is non-interference, and coordinate 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 3：
Based on 2 disconnecting switch of embodiment, the control method of earthing knife-switch lock cell：
（1）, the disconnecting switch moving knife bar 41 when being in operating position or open position, voltage sensor 32 senses quiet
With the alternating voltage over the ground more than 10kV on cutter head 33, the induced electricity of 10A-20A is formed in the secondary side of voltage sensor 32
Stream；
（2）, after induced current enters electromagnetic lock, flow through the coil in electromagnetic lock and generate magnetic field on coil, the magnetic field
By the iron core conduction wound by coil, the magnetic induction intensity on iron core is 300T-450T at this time；Magnetic force on iron core pulls on
Or push the lock tongue action of electromagnetic lock；
（3）, lock tongue acted on the earthing knife-switch latch mechanism being connected on lock tongue the pulling force or thrust of 30-40N；Earthing knife-switch latch mechanism
It is moved up or down under the action of pulling force or thrust, the distance of movement is more than 5cm；
（4）, earthing knife-switch latch mechanism lower end the lower end of the action of moving knife column 42 locking or earthing knife-switch latch mechanism is passed through into linkage
Mechanism makes moving knife column 42 be locked as off-state；
（5）, when the voltage drop on the quiet cutter head 33 of disconnecting switch down to allow close earthing knife-switch voltage value when, voltage sensor
32 can not sense that the voltage-to-ground on alternating voltage over the ground or its quiet cutter head 33 on quiet cutter head 33 meets wanting for closure earthing knife-switch
It asks, the secondary side induced current of voltage sensor 32 disappears or reduces, and the magnetic induction intensity of electromagnetic lock interior loop reduces, iron core pair
The pulling force or thrust of lock tongue are less than the elastic force of lock tongue resetting spring, and the size of the elastic force is 15N-20N, and lock tongue is in resetting spring
Elastic force effect is lower to be resetted, and lock tongue drives the action of earthing knife-switch latch mechanism, and cutter shaft 22 unlocks over the ground for the lower end of earthing knife-switch latch mechanism.
Due to the above method, after disconnecting switch can be avoided to disconnect, the residual voltage on quiet cutter head 33 is alternatively, with disconnecting switch phase
Even changes pressure transformer or other have store Electricity Functional the anti-power transmissions of component and the earthing knife-switch of disconnecting switch can not be closed
It happens, can effectively distinguish the voltage for the closure earthing knife-switch for capableing of safety, ensure that the safety of earthing knife-switch is closed, prevent because of other
Voltage disturbance influences the normal use of isolation knife.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (2)
1. a kind of false grounding prevention isolating switch for 110kV power grids, which is characterized in that including switch frame, movable cutter mechanism, quiet knife
Mechanism, cutter mechanism, moving knife electromagnetic mechanism, earthing knife-switch electromagnetic mechanism, moving knife lock linkage mechanism, earthing knife-switch lock linkage mechanism and switch
Self-locking mechanism, movable cutter mechanism, quiet cutter mechanism, cutter mechanism be located on switch frame, moving knife electromagnetic mechanism be arranged in movable cutter mechanism
For locking movable cutter mechanism, earthing knife-switch electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, and moving knife locks linkage mechanism string
It is associated on the ground cutter mechanism of the disconnecting switch of three-phase, earthing knife-switch lock linkage mechanism is connected on the earthing knife-switch machine of the disconnecting switch homonymy of three-phase
On structure, closing self-locking mechanism is set between the movable cutter mechanism and quiet cutter mechanism of disconnecting switch；Ground cutter mechanism, including ground knife bar,
Cutter shaft, earthing knife-switch motor, ground knife bar is by the way that in earthing knife-switch axis connection to switch frame, ground knife bar can be turned to around ground cutter shaft by horizontal direction
Vertical direction is simultaneously connect with earthing knife-switch interface, and earthing knife-switch motor is set at ground cutter shaft for rotationally knife bar；Earthing knife-switch electromagnetic mechanism, including
Voltage sensor, electromagnetic lock and earthing knife-switch latch mechanism, voltage sensor and electromagnetic lock are respectively positioned on Jing Daotouchu, voltage sensor
Secondary side is connected to closed circuit with the coil in electromagnetic lock, and the lock tongue of electromagnetic lock is connected with earthing knife-switch latch mechanism upper end, earthing knife-switch lock
The lower end of mechanism is connected to the closed action for locking earthing knife-switch at ground cutter shaft；The closing self-locking mechanism, including self-lock rod, from
Lock, self-lock rod both ends are respectively provided with a self-fastening button, and the self-fastening button of one end is set to moving knife column lower part, and the self-fastening button of the other end is set to
Earthing knife-switch buckle, the self-locking mechanism make ground cutter mechanism and movable cutter mechanism not to close simultaneously for locking ground cutter mechanism or movable cutter mechanism
It closes.
2. the false grounding prevention isolating switch according to claim 1 for 110kV power grids, which is characterized in that moving knife electromagnetism
Mechanism, including current sensor, electromagnetic lock and moving knife latch mechanism, current sensor are set on moving knife bar for incuding moving knife
Electric current on bar, is provided with insulating layer on current sensor, and electromagnetic lock is set to moving knife column upper end, current sensor secondary side
It is connected to closed circuit, the upper end of the lock tongue connection moving knife latch mechanism of electromagnetic lock, the moving knife latch mechanism with the coil in electromagnetic lock
Lower end be connected to the lower part of moving knife bar, moving knife latch mechanism is used to lock the disconnection action of moving knife bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510674319.7A CN105206463B (en) | 2015-10-19 | 2015-10-19 | A kind of false grounding prevention isolating switch for 110kV power grids |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510674319.7A CN105206463B (en) | 2015-10-19 | 2015-10-19 | A kind of false grounding prevention isolating switch for 110kV power grids |
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| Publication Number | Publication Date |
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| CN105206463A CN105206463A (en) | 2015-12-30 |
| CN105206463B true CN105206463B (en) | 2018-11-06 |
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| CN201510674319.7A Expired - Fee Related CN105206463B (en) | 2015-10-19 | 2015-10-19 | A kind of false grounding prevention isolating switch for 110kV power grids |
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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 |
| EP2339603A2 (en) * | 2009-12-23 | 2011-06-29 | LS Industrial Systems Co., Ltd | Interlock apparatus of ground switch for vacuum circuit breaker |
| CN103354191A (en) * | 2013-07-02 | 2013-10-16 | 保定鼎阳电力科技发展有限公司 | Device capable of preventing on-load operation of high-voltage isolating switch |
| CN203607318U (en) * | 2013-12-15 | 2014-05-21 | 陈海云 | Improved grounding switch operation misoperation prevention latching |
| CN204029694U (en) * | 2014-07-22 | 2014-12-17 | 浙江上美输配电有限公司 | High-voltage switch cabinet grounding switch interlock |
| CN205122458U (en) * | 2015-10-19 | 2016-03-30 | 夏烬楚 | A prevent misconnection ground isolator for 110kV electric wire netting |
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2015
- 2015-10-19 CN CN201510674319.7A patent/CN105206463B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201570424U (en) * | 2009-12-09 | 2010-09-01 | 武汉钢铁(集团)公司 | Switch interlocking device of high-voltage isolating switch |
| EP2339603A2 (en) * | 2009-12-23 | 2011-06-29 | LS Industrial Systems Co., Ltd | Interlock apparatus of ground switch for vacuum circuit breaker |
| CN103354191A (en) * | 2013-07-02 | 2013-10-16 | 保定鼎阳电力科技发展有限公司 | Device capable of preventing on-load operation of high-voltage isolating switch |
| CN203607318U (en) * | 2013-12-15 | 2014-05-21 | 陈海云 | Improved grounding switch operation misoperation prevention latching |
| CN204029694U (en) * | 2014-07-22 | 2014-12-17 | 浙江上美输配电有限公司 | High-voltage switch cabinet grounding switch interlock |
| CN205122458U (en) * | 2015-10-19 | 2016-03-30 | 夏烬楚 | A prevent misconnection ground isolator for 110kV electric wire netting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105206463A (en) | 2015-12-30 |
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Effective date of registration: 20191219 Address after: 750000, No. 716, the Yellow River East Road, Jinfeng District, the Ningxia Hui Autonomous Region, Yinchuan Patentee after: Power Science Research Institute of Ningxia Electric Power Co., Ltd. Address before: 610000 Chengdu City, Wuhou District province Longmen Lane No. 1, building 2, unit 12, No., No. 6 Patentee before: Xia Jinchu |
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Granted publication date: 20181106 Termination date: 20201019 |