CN202712801U - Power transmission device capable of solving loss of overhead ground wire and melting ice - Google Patents

Power transmission device capable of solving loss of overhead ground wire and melting ice Download PDF

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Publication number
CN202712801U
CN202712801U CN 201220453328 CN201220453328U CN202712801U CN 202712801 U CN202712801 U CN 202712801U CN 201220453328 CN201220453328 CN 201220453328 CN 201220453328 U CN201220453328 U CN 201220453328U CN 202712801 U CN202712801 U CN 202712801U
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CN
China
Prior art keywords
ground wire
overhead ground
strain
insulator
ice
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Expired - Fee Related
Application number
CN 201220453328
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Chinese (zh)
Inventor
宁国标
严灵
邢影
于长城
李玉蛟
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QINGYUAN ELECTRIC POWER DESIGN CO Ltd
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QINGYUAN ELECTRIC POWER DESIGN CO Ltd
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Priority to CN 201220453328 priority Critical patent/CN202712801U/en
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Publication of CN202712801U publication Critical patent/CN202712801U/en
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Abstract

The utility model discloses a power transmission device capable of solving loss of overhead ground wire and melting ice. The power transmission device comprises a strain tower, a cable connecting box, a straight-line tower, a strain cable insulator, a suspension wire insulator, an overhead ground wire, an ice melting device, and a hardware, wherein the hardware leading-down overhead ground wires are arranged on the two sides of the strain tower and connected with the cable connecting box, the straight-line tower is arranged above the overhead ground wire between the two strain towers, the suspension wire insulator is arranged on the connection part of the straight-line tower and the overhead ground wire, the overhead ground wire uses the single-point grounding way, the ice melting device is provided with a movable grounding point, and a switch corresponding to the overhead ground wire is arranged to match with the ice melting device. The generation problems of the circular flow between the ground wires and between the ground wire and the ground are effectively solved by using the single-point grounding way, the electric energy loss due to circular flow is greatly reduced; the anti-icing comprehensive control of the overhead ground wire is performed to have a very important significance on improving the overall anti-icing capacity of the power transmission line, avoiding the safety accidents and guaranteeing the power supply reliability.

Description

A kind of power transmitting device that solves overhead ground wire loss and ice-melt
Technical field
The utility model relates to a kind of overhead ground wire power transmitting device, especially a kind of power transmitting device that solves overhead ground wire loss and ice-melt.
Background technology
At present, steel strand wire and good conductor ground wire mainly adopt graded insulation ground connection, pursue basic ground connection dual mode in the transmission line, mainly adopt by basic ground connection for OPGW, and OPGW is Optical Fiber composite overhead Ground Wire.Because of the electromagnetic induction between line conductor and the ground wire and electrostatic induction, the lightning conducter and the OPGW that pursue basic ground connection can cause between the ground wire and the circulation between ground wire and the earth, and this circulation can cause the electric energy loss on the transmission line.
Earth wire of power transmission line circulation by basic ground connection, be closely related with current in wire and arrangement of conductor, according to measurement, 110kV overhead transmission line OPGW circulation is about 3-20A, 220kV overhead transmission line OPGW circulation can reach 40A, the 500kV circuit is larger because of through-put power, and its ground wire circulation can reach 60-100A.Preresearch estimates for the 220kV loop of single OPGW ground wire, is 150,000 kwh sending electrical power, and line length is in the situation of 100 km, and the annual loss dead electricity can be about 100,000 kwh.
In addition, the ice-melt demand is not considered in the design of current power transmission line grounding wire, be difficult at present realize the current method ice-melt at ground wire by in the situation of basic ground connection, in case power transmission overhead ground wire ice coverage thickness value of overstepping the extreme limit, to cause down tower, line tripping, OPGW ground thread breakage causes communicating interrupt, causes mains breakdown, causes catastrophic effect.
The utility model content
The technical problems to be solved in the utility model provides a kind of power transmitting device that solves overhead ground wire loss and ice-melt.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of power transmitting device that solves overhead ground wire loss and ice-melt, comprise strain tower, optical cable connecting box, tangent tower, strain insulator line insulator, the catenary insulator, overhead ground wire, deicing device, gold utensil, strain tower is erected at the transmission line turning, the strain tower top arranges strain insulator line insulator and connects overhead ground wire, the strain tower both sides have gold utensil to draw lower overhead ground wire and are connected in optical cable connecting box, on the overhead ground wire between two strain towers tangent tower is set, tangent tower top and overhead ground wire junction arrange the catenary insulator, overhead ground wire adopts the single-point grounding mode, deicing device arranges movable earth point, and corresponding overhead ground wire is provided with switch coupling deicing device.
Further, the single-point grounding mode of described overhead ground wire comprises single-point grounding that ground wire insulate and the single-point grounding of ground wire graded insulation completely.
Further, described deicing device comprises DC de-icing device and AC ice melting device.
Further, described strain insulator line insulator and catenary insulator are all carried discharging gap secretly.
Further, described gold utensil comprises that overhanging golden tool, strain hardware fitting, routine are drawn lower clamp, lower clamp is drawn in insulation.
Further, the continuous box of described optical cable comprises the continuous box of conventional optical cable and the continuous box of high voltage isolation insulation optical cable.
The beneficial effects of the utility model: the overhead ground wire power transmitting device adopt the single-point grounding mode effectively to solve between the ground wire and ground wire and the earth between circulation have problems, greatly reduce the electric energy loss that produces because of circulation; Implement the anti-icing comprehensive regulation of overhead ground wire, to improving the whole anti-icing ability of transmission line, avoid security incident, ensure that the mains supply reliability has very important meaning.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described further.
Fig. 1-Fig. 3 is three kinds of overhead ground wire graded insulations, the single-point grounding schematic diagram of the utility model power transmitting device;
Fig. 4 is the full section insulation of the overhead ground wire of the utility model power transmitting device, single-point grounding schematic diagram;
Fig. 5 is the optical cable connecting box structural representation of the utility model power transmitting device;
Fig. 6 is the DC ice melting schematic diagram of the utility model power transmitting device;
Fig. 7 is the interchange ice-melt schematic diagram of the utility model power transmitting device.
Embodiment
Fig. 1-Fig. 3 is three kinds of overhead ground wire graded insulations of the utility model power transmitting device, the single-point grounding mode, power transmitting device comprises strain tower 1, optical cable connecting box 2, tangent tower 3, strain insulator line insulator 4, catenary insulator 5, overhead ground wire 6, deicing device, gold utensil, strain tower 1 is erected at the transmission line turning, strain tower 1 top arranges strain insulator line insulator 4 and connects overhead ground wire 6, strain tower 1 both sides have gold utensil to draw lower overhead ground wire and are connected in optical cable connecting box 2, on the overhead ground wire 6 between two strain towers tangent tower 3 is set, tangent tower top and overhead ground wire 6 junctions arrange catenary insulator 5, overhead ground wire 6 adopts the single-point grounding mode, the single-point grounding mode can effectively solve between the ground wire and ground wire and the earth between circulation have problems, greatly reduce the electric energy loss that produces because of circulation; Strain insulator line insulator 4 is all carried discharging gap secretly with catenary insulator 5, not conducting when discharging gap normally moves at OPGW and the operation of insulating, and conducting when meeting with thunderbolt or circuit operation failure is guided large electric current into the earth through steel tower, protection circuit safety; Guaranteeing that the earth point of OPGW may be selected to be segmentation OPGW end or middle part, below is three kinds of embodiments of graded insulation, single-point grounding under the successional prerequisite of OPGW light path:
(1) shown in Figure 1ly draw lower clamp 84 at every basic OPGW strain tower 1, one side OPGW with insulation and draw down, opposite side draws lower clamp 83 with routine and draws lower and this ground connection, both sides OPGW is in high voltage isolation insulation optical cable connecting box 22 interior electrical isolation.The OPGW of OPGW strain tower insulation sides be connected the OPGW of OPGW strain tower through being connected with tower head with the insulator of discharging gap.
(2) shown in Figure 2 at every basic OPGW strain tower 1, both sides OPGW all adopts insulation to draw lower clamp 84 to draw lower, both sides OPGW is in high voltage isolation insulation optical cable connecting box 22 interior electrical isolation, select middle tangent tower 3 single-point groundings of every dish OPGW, the OPGW of other steel tower is connected with tower head through the insulator with discharging gap.
(3) Fig. 3 is at certain basic OPGW strain tower 1, and both sides OPGW all adopts insulation to draw lower clamp 84 to draw down, and both sides OPGW is in high voltage isolation insulation optical cable connecting box 22 interior electrical isolation, and OPGW is connected with tower head through the insulator with discharging gap.The two basic OPGW strain towers in the front and back adjacent with it, both sides OPGW all adopt routine to draw lower clamp 83 to draw lower and this ground connection, adopt conventional optical cable connecting box 21.The OPGW of other non-OPGW strain tower is connected with tower head through the insulator with discharging gap.
Fig. 4 is the full section insulation of the overhead ground wire of the utility model power transmitting device, single-point grounding mode, earth point may be selected to be circuit one end or circuit middle part, all adopt the insulation anchor clamps to draw lower and adopt the conventional optical cable connecting box 21 that is installed on the insulated platform at OPGW, OPGW is connected with tower head through the insulator with discharging gap; OPGW at other non-OPGW strain towers also is connected with tower head through the insulator with discharging gap.
Fig. 5 is the optical cable connecting box 2 of the utility model power transmitting device, comprises the continuous box 21 of conventional optical cable and the continuous box 22 of high voltage isolation insulation optical cable.Accompanying drawing is take the structure of the continuous box 22 of high voltage isolation insulation optical cable as example, the continuous box of optical cable is comprised of upper cartridge body 12, lower box body 13, insulated column 14, optical fiber 15, the equal insulation against ground of both sides OPGW of optical cable connecting box 2, the metal part electrical isolation of both sides OPGW, lower box body 13 includes fiber fusion-splicing unit 18, and an insulated column 14 is arranged between upper cartridge body 12 and the lower box body 13, insulated column 14 interior fill insulants, optical fiber 15 passes through from insulated column 14, keeps the continuity of light path.In addition, stick type ceramic insulator 16 is with 17 insulation of 2 pairs of iron tower construction members of OPGW optical cable connecting box.
Fig. 6 is the DC ice melting schematic diagram of the utility model power transmitting device, comprise the initial shaft tower 9 of ground wire deicing, ground wire deicing short circuit shaft tower 10, ground wire short circuit point 11, DC de-icing device 71, overhead ground wire 6, switch 19, movable earth point is set, corresponding overhead ground wire is provided with switch 19 coupling deicing devices, according to the OPGW model, the icing situation, the ground insulator withstand voltage, weather conditions, the ice-melt time, treat that the factor such as DC ice-melting length calculates and choose the DC de-icing device capacity, the parameters such as ice melting current, unit length voltage drop when OPGW and ground wire DC ice melting are adjusted in verification, select suitable ground wire short circuit point 11 in conjunction with result of calculation and circuit actual conditions, by transmission line being applied direct voltage and carrying out short circuit at the transmission line end, make conductor overheating carry out ice-melt to transmission line, thereby avoid circuit because freezing rod disconnection.If OPGW is without earth point in selected ice-melt scope, directly ice-melt; If in selected ice-melt scope, the OPGW earth point is arranged, then must open the down conductor of OPGW earth point, so that OPGW runs on insulation completely without the state of earth point, use OPGW short circuit ice-melting mode.
Fig. 7 is the interchange ice-melt schematic diagram of the utility model power transmitting device, comprise the initial shaft tower 9 of ground wire deicing, ground wire deicing short circuit shaft tower 10, ground wire short circuit point 11, AC ice melting device 72, overhead ground wire 6, switch, movable earth point is set, corresponding overhead ground wire is provided with switch 19 coupling deicing devices, according to the OPGW model, the icing situation, the ground insulator withstand voltage, weather conditions, the AC ice melting device capacity is calculated and chosen to the factors such as ice-melt time, the parameters such as ice melting current, and then unit length voltage drop when calculating the OPGW ice-melt, select suitable ground wire short circuit point 11 in conjunction with result of calculation and circuit actual conditions.If OPGW is without earth point in selected ice-melt scope, directly ice-melt; If in selected ice-melt scope, the OPGW earth point is arranged, then must open the down conductor of OPGW earth point, carry out again OPGW short circuit ice-melt.
This experiment is novel not only for OPGW, also is applicable to common ground wire.
The above only is preferential execution mode of the present utility model, and the utility model is not limited to above-mentioned execution mode, as long as realize that with basic identical means the technical scheme of the utility model purpose all belongs within the protection range of the present utility model.

Claims (6)

1. power transmitting device that solves overhead ground wire loss and ice-melt, comprise strain tower (1), optical cable connecting box (2), tangent tower (3), strain insulator line insulator (4), catenary insulator (5), overhead ground wire (6), deicing device, gold utensil, strain tower (1) is erected at the transmission line turning, strain tower (1) top arranges strain insulator line insulator (4) and connects overhead ground wire (6), strain tower (1) both sides have gold utensil to draw lower overhead ground wire and are connected in optical cable connecting box (2), tangent tower (3) is set on the overhead ground wire between two strain towers (6), tangent tower top and overhead ground wire (6) junction arranges catenary insulator (5), it is characterized in that: overhead ground wire (6) adopts the single-point grounding mode, deicing device arranges movable earth point, and corresponding overhead ground wire is provided with switch (19) coupling deicing device.
2. a kind of power transmitting device that solves overhead ground wire loss and ice-melt according to claim 1 is characterized in that: the single-point grounding mode of described overhead ground wire (6) comprises single-point grounding that ground wire insulate and the single-point grounding of ground wire graded insulation completely.
3. a kind of power transmitting device that solves overhead ground wire loss and ice-melt according to claim 1 is characterized in that: described deicing device comprises DC de-icing device (71) and AC ice melting device (72).
4. a kind of power transmitting device that solves overhead ground wire loss and ice-melt according to claim 1 is characterized in that: described strain insulator line insulator (4) is all carried discharging gap secretly with catenary insulator (5).
5. a kind of power transmitting device that solves overhead ground wire loss and ice-melt according to claim 1 is characterized in that: described gold utensil comprises that overhanging golden tool (81), strain hardware fitting (82), routine are drawn lower clamp (83), lower clamp (84) is drawn in insulation.
6. a kind of power transmitting device that solves overhead ground wire loss and ice-melt according to claim 1, it is characterized in that: the continuous box of described optical cable (2) comprises the continuous box of conventional optical cable (21) and the continuous box of high voltage isolation insulation optical cable (22).
CN 201220453328 2012-09-06 2012-09-06 Power transmission device capable of solving loss of overhead ground wire and melting ice Expired - Fee Related CN202712801U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220453328 CN202712801U (en) 2012-09-06 2012-09-06 Power transmission device capable of solving loss of overhead ground wire and melting ice

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220453328 CN202712801U (en) 2012-09-06 2012-09-06 Power transmission device capable of solving loss of overhead ground wire and melting ice

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103296629A (en) * 2013-06-21 2013-09-11 国家电网公司 Ground wire DC (direct current) deicing method based on discharge gap insulator
CN104929410A (en) * 2015-04-28 2015-09-23 国核电力规划设计研究院 Overhead power transmission line
CN106154448A (en) * 2015-04-20 2016-11-23 中国电力科学研究院 One can optical fiber composite overhead ground wire capable of melting ice connector box and attaching method thereof
CN106547061A (en) * 2017-01-19 2017-03-29 温州市图盛科技有限公司 A kind of transformer station's guiding optical cable optimization laying method
CN109390897A (en) * 2018-12-12 2019-02-26 国网冀北电力有限公司电力科学研究院 A kind of aerial earth wire for opening strain insulator mode and ground wire strain insulator based on ground wire

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103296629A (en) * 2013-06-21 2013-09-11 国家电网公司 Ground wire DC (direct current) deicing method based on discharge gap insulator
CN106154448A (en) * 2015-04-20 2016-11-23 中国电力科学研究院 One can optical fiber composite overhead ground wire capable of melting ice connector box and attaching method thereof
CN104929410A (en) * 2015-04-28 2015-09-23 国核电力规划设计研究院 Overhead power transmission line
CN104929410B (en) * 2015-04-28 2017-08-01 国核电力规划设计研究院 A kind of overhead transmission line
CN106547061A (en) * 2017-01-19 2017-03-29 温州市图盛科技有限公司 A kind of transformer station's guiding optical cable optimization laying method
CN109390897A (en) * 2018-12-12 2019-02-26 国网冀北电力有限公司电力科学研究院 A kind of aerial earth wire for opening strain insulator mode and ground wire strain insulator based on ground wire

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130130

Termination date: 20140906

EXPY Termination of patent right or utility model