CN109326478B - GIL power transmission system and power transmission line - Google Patents

GIL power transmission system and power transmission line Download PDF

Info

Publication number
CN109326478B
CN109326478B CN201710646624.4A CN201710646624A CN109326478B CN 109326478 B CN109326478 B CN 109326478B CN 201710646624 A CN201710646624 A CN 201710646624A CN 109326478 B CN109326478 B CN 109326478B
Authority
CN
China
Prior art keywords
power transmission
moving contact
transmission line
contact
conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710646624.4A
Other languages
Chinese (zh)
Other versions
CN109326478A (en
Inventor
王赛豪
段晓辉
杜迎乾
孙英杰
陈轩
刘贞瑶
占小猛
董祥渊
柴影辉
秦政敏
刘宇
朱苛娄
郭良超
郭东方
孙琼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Pinggao Group Co Ltd, Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201710646624.4A priority Critical patent/CN109326478B/en
Publication of CN109326478A publication Critical patent/CN109326478A/en
Application granted granted Critical
Publication of CN109326478B publication Critical patent/CN109326478B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003Earthing switches
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/16Earthing arrangements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035Gas-insulated switchgear
    • H02B13/075Earthing arrangements

Abstract

The invention relates to a GIL power transmission system and a power transmission line. The GIL power transmission system comprises a power transmission line, the power transmission line comprises a sleeve and a power transmission conductor arranged in the sleeve, and a grounding switch used for grounding the power transmission conductor after the power transmission line is disconnected and further releasing induced current and induced voltage on the power transmission conductor is arranged on the power transmission line. According to the GIL power transmission system, the grounding switch used for conducting the power transmission conductor in the sleeve with the ground after the power transmission line is disconnected and further releasing the induced current and the induced voltage on the power transmission conductor is arranged on the power transmission line, and the power transmission conductor is timely conducted with the ground after the GIL power transmission line is disconnected due to faults through the grounding switch, so that the induced current and the induced voltage on the power transmission conductor are timely released, the damage of the induced current and the induced voltage on the power transmission conductor to equipment is avoided, and the whole GIL power transmission system can safely operate.

Description

GIL power transmission system and power transmission line
Technical Field
The invention relates to a GIL power transmission system and a power transmission line.
Background
In the field of power transmission of a power grid, multiple power transmission lines on the same tower generally exist, when one power transmission line breaks down and is cut off for maintenance, due to the action of electrostatic induction and electromagnetic coupling, a large induced current and an induced voltage can be generated in a fault loop, the voltage and the current generated by the induction can not only cause damage to equipment, but also easily cause induced electric shock accidents of field personnel, and bring risks to safe production and operation of the power grid.
With the development of electric power utilities in China, the transmission voltage class and the transmission capacity are gradually increased, and in order to meet the transmission requirements of high voltage and high capacity, a GIL transmission system is gradually used, for example, a Sutong GIL comprehensive pipe gallery project of an ultra-high voltage alternating current transmission and transformation project of Huainan-Nanjing-Shanghai planned to be put into operation in 2019 is a transmission project which adopts a GIL transmission technology in the ultra-high voltage project construction for the first time in the world.
The GIL power transmission system adopts a gas-insulated metal closed power transmission technology, a power transmission line comprises a sleeve, a power transmission conductor used for transmitting current is arranged in the sleeve, insulating gas used for realizing gas insulation between the power transmission conductor and the sleeve is further arranged in the sleeve, the sleeve is connected with the ground to realize grounding, the GIL adopts the power transmission conductor to transmit current, and the current transmission capacity of the power transmission line is greatly improved. However, the existing GIL power transmission technology only performs grounding treatment on a sleeve, and effective protection measures are not provided for an internal power transmission conductor, so that when a GIL power transmission line is cut off, induced current and induced voltage generated on the internal power transmission conductor cannot be released, and great risk is caused to the operation of a GIL power transmission system.
Disclosure of Invention
The invention aims to provide a GIL power transmission system which can timely release induced current and induced voltage on a power transmission conductor so as to ensure the safe operation of the system; the invention also aims to provide a power transmission line used in the GIL power transmission system.
In order to achieve the purpose, the technical scheme of the GIL power transmission system is as follows: a GIL power transmission system comprises a power transmission line, wherein the power transmission line comprises a sleeve and a power transmission conductor arranged in the sleeve, and a grounding switch used for grounding the power transmission conductor after the power transmission line is disconnected and further releasing induced current and induced voltage on the power transmission conductor is arranged on the power transmission line.
The grounding switch is connected in series on the power transmission line and comprises a cylinder body connected with the sleeve, a static contact connected with the power transmission conductor in a conductive mode is arranged in the cylinder body, the grounding switch further comprises a moving contact connected with the ground in a conductive mode, and the contact end of the moving contact extends into the cylinder body and is driven by an operating mechanism to achieve contact and separation with the static contact.
The grounding switch further comprises a guide track which is connected with one end of the connecting rod and forms a crank-slider mechanism together with the crank and the connecting rod, the other end of the connecting rod is hinged with the movable contact, a connecting point of the connecting rod and the guide track, a hinged point of the connecting rod and the movable contact and a rotating center of the crank are all located on the same circle with the hinged point of the crank and the connecting rod as the circle center, and the extending direction of the guide track is perpendicular to the moving path of the movable contact.
The crank arm box is provided with a moving contact seat guiding the moving contact, and the moving contact seat is provided with a shielding cover at one end facing the fixed contact.
And a boss which is protruded along the radial direction and is used for being matched with the stop of the moving contact seat to prevent the moving contact from being excessively switched on is arranged at one end, far away from the static contact, of the moving contact.
The moving contact is arranged in an inner hole of the moving contact seat in a penetrating mode, and the moving contact is guided by the moving contact seat through a guide ring arranged in the inner hole of the moving contact seat.
The leading-out terminal which is arranged on the crank arm box and is communicated with the moving contact seat and the guide track are positioned on the side wall surface opposite to or adjacent to the crank arm box.
And a buffer pad for limiting and buffering the motion of the moving contact when the moving contact is switched off is arranged on the inner wall surface of the crank arm box.
The GIL power transmission system further comprises a control system which controls the grounding switch to be disconnected when the power transmission line normally runs and controls the grounding switch to be connected after the power transmission line is disconnected so as to further ground the power transmission conductor.
In order to achieve the purpose, the technical scheme of the power transmission line is as follows: a power transmission line comprises a sleeve and a power transmission conductor arranged in the sleeve, wherein a grounding switch used for grounding the power transmission conductor after the power transmission line is disconnected and further releasing induced current and induced voltage on the power transmission conductor is arranged on the power transmission line.
The grounding switch is connected in series on the power transmission line and comprises a cylinder body connected with the sleeve, a static contact connected with the power transmission conductor in a conductive mode is arranged in the cylinder body, the grounding switch further comprises a moving contact connected with the ground in a conductive mode, and the contact end of the moving contact extends into the cylinder body and is driven by an operating mechanism to achieve contact and separation with the static contact.
The grounding switch further comprises a guide track which is connected with one end of the connecting rod and forms a crank-slider mechanism together with the crank and the connecting rod, the other end of the connecting rod is hinged with the movable contact, a connecting point of the connecting rod and the guide track, a hinged point of the connecting rod and the movable contact and a rotating center of the crank are all located on the same circle with the hinged point of the crank and the connecting rod as the circle center, and the extending direction of the guide track is perpendicular to the moving path of the movable contact.
The crank arm box is provided with a moving contact seat guiding the moving contact, and the moving contact seat is provided with a shielding cover at one end facing the fixed contact.
And a boss which is protruded along the radial direction and is used for being matched with the stop of the moving contact seat to prevent the moving contact from being excessively switched on is arranged at one end, far away from the static contact, of the moving contact.
The moving contact is arranged in an inner hole of the moving contact seat in a penetrating mode, and the moving contact is guided by the moving contact seat through a guide ring arranged in the inner hole of the moving contact seat.
The leading-out terminal which is arranged on the crank arm box and is communicated with the moving contact seat and the guide track are positioned on the side wall surface opposite to or adjacent to the crank arm box.
And a buffer pad for limiting and buffering the motion of the moving contact when the moving contact is switched off is arranged on the inner wall surface of the crank arm box.
The invention has the beneficial effects that: according to the GIL power transmission system, the grounding switch used for conducting the power transmission conductor in the sleeve with the ground after the power transmission line is disconnected and further releasing the induced current and the induced voltage on the power transmission conductor is arranged on the power transmission line. Through the grounding switch, after the GIL power transmission line breaks down and is disconnected, the power transmission conductor is conducted with the ground in time, so that induced current and induced voltage on the power transmission conductor are released in time, the damage of the induced current and the induced voltage on the power transmission conductor to equipment is avoided, and the whole GIL power transmission system can run safely.
Further, earthing switch is in the in-service use in-process, the crank is driven by drive arrangement and is rotatory around the rotation center, drive the connecting rod pivoted with it and rotate, the one end of connecting rod moves under the guide effect of guide rail, the movement track of the pin joint of the other end of connecting rod and moving contact is injectd under the restraint of this end movement track, make the hinged end of connecting rod and moving contact only in the direction of keeping away from and being close to the static contact rectilinear movement, thereby inject the movement track of the pin joint of connecting rod and moving contact through the injecing to connecting rod one end movement track, the connecting rod can not lead to the moving contact slope in the moving contact seat at the drive moving contact reciprocating motion in-process, thereby avoided the moving contact to appear the phenomenon of jamming because of the slope leads to with the moving contact seat in the high-speed motion process, make the. And the damage to the moving contact caused by the clamping stagnation phenomenon is also avoided.
Furthermore, the crank arm box is provided with the cushion pad, so that the moving contact for rapid opening can be limited and buffered, and the moving contact is prevented from overshooting during opening and damaging the device.
Drawings
Fig. 1 is a structural diagram of a GIL power transmission system according to an embodiment 1 of the present invention, in which an earthing switch is in an off state;
fig. 2 is a structural diagram of a GIL power transmission system according to embodiment 1 of the present invention, in which an earthing switch is in a closed state.
In the figure: 1. a barrel; 2. a crank arm box; 3. a center conductor; 4. static contact; 5. a moving contact; 51. a boss; 6. a crank; 7. a connecting rod; 8. a guide seat; 9. a guide plate; 10. a cushion pad; 11. an insulating disk; 111. a conductive insert; 12. an insulating platen; 13. a movable contact seat; 131. a shield case; 14. copper bars; 15. a ground plate; 16. a ground block; 17. a basin-type insulator.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
A specific embodiment 1 of a GIL power transmission system of the present invention includes a power transmission line including a bushing and a power transmission conductor disposed in the bushing, the bushing having an insulating gas disposed therein. The power transmission line is also provided with an inductor which is used for communicating the power transmission conductor with the ground when the power transmission line is disconnected and further communicating the power transmission conductor with the groundThe earthing switch for releasing current and induced voltage is connected in series on a power transmission line, the earthing switch has a specific structure as shown in fig. 1-2 and comprises a cylinder body 1 and an operating mechanism A, wherein two ends of the cylinder body 1 are respectively connected with two sections of casing pipes, the operating mechanism A is arranged on the cylinder body 1 and comprises a driving device and a transmission structure, a crank arm box 2 is connected onto the cylinder body 1, and the transmission structure is located in the crank arm box 2. A central conductor 3 which is used for being communicated with a transmission conductor inside the sleeve is arranged in the barrel 1, the central conductor 3 is fixed at the central position of the barrel 1 through two basin-type insulators 17 arranged at two ends of the central conductor 3, and a static contact 4 is arranged between the two basin-type insulators 17 on the central conductor 3. The closed air chamber formed between the barrel 1 and the two basin-type insulators 17 is filled with insulating gas with good insulating property, in the embodiment, the insulating gas is SF6In other embodiments, the insulating gas may be another insulating gas with good insulating property.
Be provided with first interface on the left side wall of turning arm box 2, interface department has guide holder 8 through the bolt fastening, and the inboard of guide holder 8 is provided with deflector 9, and the level is provided with the guide rail on the deflector 9, in this embodiment the guide rail is the horizontal slot hole that sets up on deflector 9. The right side wall surface is provided with a wire outlet, an insulating disc 11 is arranged in the wire outlet, the insulating disc 11 is tightly pressed and fixed in the right end wire outlet through an insulating pressing plate 12 arranged on the outer side of the insulating disc, a conductive insert 111 is arranged at the center of the insulating disc 11, a through hole for the conductive insert 111 to penetrate out is correspondingly arranged on the connecting pressing plate, and the outer end of the conductive insert is a wire outlet end. The upper side of the barrel body 1 is provided with a flange pulling opening, the connecting lever box 2 is connected to the flange pulling opening through a screw, the lower end of the connecting lever box 2 is provided with a second connecting port communicated with an inner cavity of the flange pulling opening, the lower end of the connecting lever box 2 is connected with a movable contact seat 13, and the movable contact seat 13 is positioned in the inner cavity of the flange pulling opening and has a gap with the inner wall surface of the flange pulling opening.
The middle part of the crank arm box 2 is provided with a rotating shaft extending out of the crank arm box 2 and connected with a driving device, one end of the rotating shaft located in the crank arm box is connected with a crank 6, the rotating end of the crank 6 is hinged with a connecting rod 7, the hinged point of the crank 6 and the connecting rod 7 is located in the middle of the connecting rod 7, the left end of the connecting rod 7 is connected with a guide track on the guide plate 9 through a pin shaft and can move along the guide track, and the crank 6, the connecting rod 7 and the guide track form a slider-crank mechanism. The right end of the connecting rod 7 is hinged with a moving contact 5. The connecting point of the connecting rod 7 and the guide track, the hinge point of the connecting rod 7 and the movable contact 5 and the rotation center of the crank are all positioned on the same circle with the hinge point of the crank and the connecting rod as the circle center, and the extension direction of the guide track is vertical to the moving path of the movable contact.
An inner hole for the moving contact 5 to penetrate through is formed in the moving contact seat 13, a lower end contact end of the moving contact 5 penetrates through the inner hole to extend into the barrel body 1 to be matched with the static contact 4, a shielding cover 131 is arranged at the lower end, close to the static contact 4, of the moving contact seat 13, the upper end face of the static contact 4 is arranged to be an arc face, the shielding cover 131 and the arc face are arranged to play a role in homogenizing an electric field, and the insulativity between the moving contact seat 13 and the static contact 4 is improved.
In addition, a boss 51 protruding in the radial direction and adapted to be in blocking fit with the movable contact base 13 to prevent the movable contact from being excessively switched on is disposed at an end of the movable contact 5 away from the stationary contact 4. A buffer pad 10 which is used for limiting and buffering the upward movement distance of the moving contact 5 when the moving contact 5 is opened is arranged on the inner wall surface above the crank arm box 2. The crank 6 swings up and down within 80 degrees in the left space inside the crank arm box 2 under the limiting action of the two limiting structures. A guide ring (not shown in the figure) for adjusting the moving direction of the moving contact 5 and further ensuring the centering of the moving contact 5 and the static contact 4 is arranged in an inner hole of the moving contact seat 13.
The articulated position department of moving contact 5 and connecting rod 7 is provided with insulation system for realize the insulation between moving contact 5 and the transmission structure, insulation system is including setting up the gum cover between moving contact 5 and articulated shaft fitting surface and setting up the insulating pad between moving contact 5 and connecting rod 7 fitting surface. An insulation structure is also arranged between the movable contact seat 13 and the connecting lever box 2 and used for realizing insulation between the movable contact seat 13 and the connecting lever box 2, and the insulation structure comprises an insulation sleeve arranged between the movable contact seat 13 and the connecting structure and an insulation gasket arranged between matching surfaces of the movable contact seat 13 and the connecting lever box 2.
The movable contact seat 13 is in conductive connection with the inner end of the conductive insert 111 through the copper bar 14, the outer end of the conductive insert 111 is in conductive connection with a grounding block 16 arranged on the cylinder body 1 through a grounding plate 15, and the cylinder body 1 is in conductive connection with the ground, so that the function of a grounding switch is realized; when the moving contact 5 is used as a test electrode, the test can be performed by simply disconnecting the electrical connection between the grounding plate 15 and the grounding block 16.
The GIL power transmission system also comprises a control system which controls the grounding switch to be disconnected when the power transmission line normally runs and controls the grounding switch to be connected after the power transmission line is disconnected so as to further ground the power transmission conductor.
In the actual use process of the GIL power transmission system, the grounding switch is arranged on the power transmission line and used for conducting the power transmission conductor in the sleeve with the ground after the power transmission line is disconnected so as to release the induced current and the induced voltage on the power transmission conductor. Through the grounding switch, after the GIL power transmission line breaks down and is disconnected, the power transmission conductor is conducted with the ground in time, so that induced current and induced voltage on the power transmission conductor are released in time, the damage of the induced current and the induced voltage on the power transmission conductor to equipment is avoided, and the whole GIL power transmission system can run safely.
In addition, when the grounding switch is used, the crank 6 is driven to rotate by the rotating shaft to drive the connecting rod 7 hinged with the crank to rotate, the left end of the connecting rod 7 horizontally moves under the guiding action of the guide track, and the motion track of the hinged point of the right end of the connecting rod 7 and the moving contact 5 is constrained to be in the vertical direction under the constraint of the motion track of the left end of the connecting rod 7. Thereby inject the motion trail of the pin joint of connecting rod 7 right-hand member and moving contact 5 through the injecing to connecting rod 7 left end motion trail, connecting rod 7 can not lead to moving contact 5 to incline in moving contact seat 13 at 5 reciprocating motion in-process in the area of moving contact to avoided moving contact 5 to appear the phenomenon of jamming because of what the slope leads to with moving contact seat 13 in the high-speed motion in-process, made the device can move smoothly. And the damage to the moving contact 5 caused by the clamping stagnation phenomenon is also avoided.
The moving contact 5 is in conductive communication with a moving contact base 13, and the moving contact base 13 is in communication with the ground through a copper bar 14, a conductive insert, a grounding plate 15, a grounding block 16 and the cylinder 1.
As another embodiment of the present invention, the grounding plate 15 may be electrically connected to the barrel directly instead of being electrically connected to the barrel through the grounding block 16.
In another embodiment of the present invention, a slide block may be guided and mounted on the guide track, and the link is hinged to the slide block and moves on the guide track through the slide block.
In another embodiment of the present invention, the outlet provided with the outlet end of the movable contact block is not provided on the right side wall surface opposite to the guide rail, but is provided on the front side wall surface or the rear side wall surface adjacent to the guide rail.
The specific structure of the specific embodiment of the power transmission line of the present invention is the same as that of the power transmission line in each embodiment of the GIL power transmission system, and details are not repeated here.

Claims (14)

1. The utility model provides a GIL transmission system, includes transmission line, transmission line includes the sleeve pipe and sets up the transmission conductor in the sleeve pipe, its characterized in that: the power transmission line is provided with a grounding switch which is used for grounding the power transmission conductor after the power transmission line is disconnected and further releasing induced current and induced voltage on the power transmission conductor; the grounding switch is connected in series on the power transmission line and comprises a cylinder body connected with the sleeve, a static contact connected with the power transmission conductor in a conductive manner is arranged in the cylinder body, the grounding switch also comprises a moving contact connected with the ground in a conductive manner, and the contact end of the moving contact extends into the cylinder body and is driven by an operating mechanism to realize the contact and separation with the static contact; the two ends of the cylinder are respectively connected with the two sections of sleeves, a central conductor which is used for being communicated with a transmission conductor inside the sleeves is arranged in the cylinder, the central conductor is fixed at the central position of the cylinder through two basin-type insulators arranged at the two ends of the central conductor, the static contact is arranged on the central conductor and positioned between the two basin-type insulators, and a closed cavity formed between the cylinder and the two basin-type insulators is filled with insulating gas; the GIL power transmission system further comprises a control system which controls the grounding switch to be disconnected when the power transmission line normally runs and controls the grounding switch to be connected after the power transmission line is disconnected so as to further ground the power transmission conductor.
2. The GIL power transmission system of claim 1, wherein: the grounding switch further comprises a guide track which is connected with one end of the connecting rod and forms a crank-slider mechanism together with the crank and the connecting rod, the other end of the connecting rod is hinged with the movable contact, a connecting point of the connecting rod and the guide track, a hinged point of the connecting rod and the movable contact and a rotating center of the crank are all located on the same circle with the hinged point of the crank and the connecting rod as the circle center, and the extending direction of the guide track is perpendicular to the moving path of the movable contact.
3. The GIL power transmission system of claim 2, wherein: the crank arm box is provided with a moving contact seat guiding the moving contact, and the moving contact seat is provided with a shielding cover at one end facing the fixed contact.
4. The GIL power transmission system of claim 3, wherein: and a boss which is protruded along the radial direction and is used for being matched with the stop of the moving contact seat to prevent the moving contact from being excessively switched on is arranged at one end, far away from the static contact, of the moving contact.
5. The GIL power transmission system of claim 3, wherein: the moving contact is arranged in an inner hole of the moving contact seat in a penetrating mode, and the moving contact is guided by the moving contact seat through a guide ring arranged in the inner hole of the moving contact seat.
6. The GIL power transmission system of claim 3, wherein: the leading-out terminal which is arranged on the crank arm box and is communicated with the moving contact seat and the guide track are positioned on the side wall surface opposite to or adjacent to the crank arm box.
7. The GIL power transmission system of claim 2, wherein: and a buffer pad for limiting and buffering the motion of the moving contact when the moving contact is switched off is arranged on the inner wall surface of the crank arm box.
8. The utility model provides a transmission line, includes sleeve pipe and sets up the transmission conductor in the sleeve pipe, its characterized in that: the power transmission line is provided with a grounding switch which is used for grounding the power transmission conductor after the power transmission line is disconnected and further releasing induced current and induced voltage on the power transmission conductor; the grounding switch is connected in series on the power transmission line and comprises a cylinder body connected with the sleeve, a static contact connected with the power transmission conductor in a conductive manner is arranged in the cylinder body, the grounding switch also comprises a moving contact connected with the ground in a conductive manner, and the contact end of the moving contact extends into the cylinder body and is driven by an operating mechanism to realize the contact and separation with the static contact; the two ends of the cylinder are respectively connected with the two sections of sleeves, a central conductor which is used for being communicated with a transmission conductor inside the sleeves is arranged in the cylinder, the central conductor is fixed at the central position of the cylinder through two basin-type insulators arranged at the two ends of the central conductor, the static contact is arranged on the central conductor and positioned between the two basin-type insulators, and a closed cavity formed between the cylinder and the two basin-type insulators is filled with insulating gas; the power transmission line is used for being connected into a GIL power transmission system, and the GIL power transmission system comprises a control system which controls the grounding switch to be disconnected when the power transmission line normally runs and controls the grounding switch to be connected after the power transmission line is disconnected so as to further ground a power transmission conductor.
9. The power transmission line of claim 8, characterized in that: the grounding switch further comprises a guide track which is connected with one end of the connecting rod and forms a crank-slider mechanism together with the crank and the connecting rod, the other end of the connecting rod is hinged with the movable contact, a connecting point of the connecting rod and the guide track, a hinged point of the connecting rod and the movable contact and a rotating center of the crank are all located on the same circle with the hinged point of the crank and the connecting rod as the circle center, and the extending direction of the guide track is perpendicular to the moving path of the movable contact.
10. The power transmission line of claim 9, characterized in that: the crank arm box is provided with a moving contact seat guiding the moving contact, and the moving contact seat is provided with a shielding cover at one end facing the fixed contact.
11. The power transmission line of claim 10, characterized in that: and a boss which is protruded along the radial direction and is used for being matched with the stop of the moving contact seat to prevent the moving contact from being excessively switched on is arranged at one end, far away from the static contact, of the moving contact.
12. The power transmission line of claim 10, characterized in that: the moving contact is arranged in an inner hole of the moving contact seat in a penetrating mode, and the moving contact is guided by the moving contact seat through a guide ring arranged in the inner hole of the moving contact seat.
13. The power transmission line of claim 10, characterized in that: the leading-out terminal which is arranged on the crank arm box and is communicated with the moving contact seat and the guide track are positioned on the side wall surface opposite to or adjacent to the crank arm box.
14. The power transmission line of claim 9, characterized in that: and a buffer pad for limiting and buffering the motion of the moving contact when the moving contact is switched off is arranged on the inner wall surface of the crank arm box.
CN201710646624.4A 2017-08-01 2017-08-01 GIL power transmission system and power transmission line Active CN109326478B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710646624.4A CN109326478B (en) 2017-08-01 2017-08-01 GIL power transmission system and power transmission line

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710646624.4A CN109326478B (en) 2017-08-01 2017-08-01 GIL power transmission system and power transmission line
PCT/CN2017/108896 WO2019024291A1 (en) 2017-08-01 2017-11-01 Gil power transmission system, power transmission line and grounding switch

Publications (2)

Publication Number Publication Date
CN109326478A CN109326478A (en) 2019-02-12
CN109326478B true CN109326478B (en) 2020-11-06

Family

ID=65233290

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710646624.4A Active CN109326478B (en) 2017-08-01 2017-08-01 GIL power transmission system and power transmission line

Country Status (2)

Country Link
CN (1) CN109326478B (en)
WO (1) WO2019024291A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109995010B (en) * 2019-04-29 2021-04-20 南京南瑞继保电气有限公司 Automatic control method and system for induced current quick release device
CN111739758A (en) * 2020-06-29 2020-10-02 江山海维科技有限公司 Interchange regulation nature high voltage earthing switch

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101882527A (en) * 2010-06-23 2010-11-10 广西中电新源电气有限公司 Three-station isolating/grounding switch adopting floating structure and self-adaptive conductive contact
CN201788876U (en) * 2010-06-28 2011-04-06 山东泰开高压开关有限公司 550kV quick grounding switch
CN102354922A (en) * 2011-10-25 2012-02-15 沈阳华德海泰电器有限公司 Rapid grounding switch
JP2012253962A (en) * 2011-06-06 2012-12-20 Kanden Engineering:Kk Gas leak repair method for gas insulated electric device
CN202678183U (en) * 2012-05-16 2013-01-16 平高集团有限公司 A three-operating-position isolation grounding switch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08306270A (en) * 1995-04-28 1996-11-22 Toshiba Corp Grounding switch
CN201229884Y (en) * 2008-07-02 2009-04-29 中国西电电气股份有限公司 Fast grounding switch
CN202395319U (en) * 2011-11-25 2012-08-22 中国西电电气股份有限公司 Multifunctional bus connection structure for GIS (gas insulated switchgear)
CN203660298U (en) * 2013-12-17 2014-06-18 河南省电力勘测设计院 220kV GIS line-outgoing structure
CN204011230U (en) * 2014-07-01 2014-12-10 山东泰开高压开关有限公司 252kV bus separate-box type GIS combined electrical apparatus novel bus earthed switch
EP3076420B1 (en) * 2015-03-31 2017-10-04 General Electric Technology GmbH Quick earth connection with breaking capacity for a station under a metal shell

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101882527A (en) * 2010-06-23 2010-11-10 广西中电新源电气有限公司 Three-station isolating/grounding switch adopting floating structure and self-adaptive conductive contact
CN201788876U (en) * 2010-06-28 2011-04-06 山东泰开高压开关有限公司 550kV quick grounding switch
JP2012253962A (en) * 2011-06-06 2012-12-20 Kanden Engineering:Kk Gas leak repair method for gas insulated electric device
CN102354922A (en) * 2011-10-25 2012-02-15 沈阳华德海泰电器有限公司 Rapid grounding switch
CN202678183U (en) * 2012-05-16 2013-01-16 平高集团有限公司 A three-operating-position isolation grounding switch

Also Published As

Publication number Publication date
CN109326478A (en) 2019-02-12
WO2019024291A1 (en) 2019-02-07

Similar Documents

Publication Publication Date Title
CN109326478B (en) GIL power transmission system and power transmission line
CN205230913U (en) Three -position isolation grounding switch
CN203134677U (en) Insulating cylinder and main loop structure adopting same
CN210866028U (en) Horizontal opening type outdoor direct-current three-station high-voltage isolating switch
CN203895397U (en) Solid insulation fuse
CN104299732B (en) A kind of gravity-driven changes the arc-control device of bullet
CN102856831B (en) Movable door mechanism of high voltage switch cabinet
CN102543558B (en) Vacuum switch module for looped network cabinet
CN109326479B (en) Grounding switch and operating mechanism and transmission structure thereof
CN204927932U (en) Dolly of PT cabinet busbar grounding is exclusively used in
WO2015043460A1 (en) High-speed grounding switch and grounding switch assembly unit composed thereof
CN104143464B (en) Earthed switch assembly unit and high-speed grounding switch thereof
CN201886951U (en) Grounding switch and rear door interlocking device for high-voltage switch cabinet
CN111326364A (en) Intelligent controller of high-voltage isolating switch
CN202094038U (en) Straight swinging dual step action outdoor high-voltage alternating current grounding switch
CN104733223A (en) Automatic insulation protecting device for compression spring resetting type breaker
CN204706508U (en) A kind of mine flameproof and intrinsic safety type modular permanent magnetism feeding switch
CN205355656U (en) Outdoor compact substation high -voltage switch gas tank
CN104143451B (en) High-speed earthing switch and earthing switch assembly unit with same
CN201111314Y (en) General vacuum air pressing type combined power distribution device for mining
CN204045943U (en) A kind of high insulated type valve arrangement
CN203631395U (en) High-speed grounding switch of high-voltage composite electric appliance
CN202839428U (en) Disconnecting switch for subways
CN209515539U (en) Multifunction combined ice-melt disconnecting switch
CN203134653U (en) Mechanical interlocking device between isolating switch and grounding switch for open type combined electric appliance

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant