CN102780193B - A kind of power transmission line overhead ground wire electric current de-icing method - Google Patents

A kind of power transmission line overhead ground wire electric current de-icing method Download PDF

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Publication number
CN102780193B
CN102780193B CN201210232535.2A CN201210232535A CN102780193B CN 102780193 B CN102780193 B CN 102780193B CN 201210232535 A CN201210232535 A CN 201210232535A CN 102780193 B CN102780193 B CN 102780193B
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China
Prior art keywords
ice
melt
ground wire
overhead ground
overhead
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CN201210232535.2A
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Chinese (zh)
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CN102780193A (en
Inventor
徐晓刚
王宇
彭向阳
姚森敬
王建国
毛先胤
麦晓明
薛健
李志峰
李显强
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广东电网公司电力科学研究院
武汉大学
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Priority to CN201210232535.2A priority Critical patent/CN102780193B/en
Publication of CN102780193A publication Critical patent/CN102780193A/en
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Abstract

A kind of power transmission line overhead ground wire electric current de-icing method, under mainly comprising the steps: to use described ground insulator every bar overhead ground wire insulation to be drawn respectively, and by grounding switch ground connection, when transmission line normally runs, described overhead ground wire is by closed grounding switch reliable ground, during ice-melt, grounding switch disconnects, overhead ground wire insulation against ground; To the end of the overhead ground wire of ice-melt and another overhead ground wire near it or the transmission pressure of having stopped transport be needed by shorting stub short circuit, and another overhead ground wire needed near the top of the overhead ground wire of ice-melt and described its or the described transmission pressure of having stopped transport are accessed described ice-melt power supply form ice-melt loop, open described ice-melt power supply, in described ice-melt loop, produce ice melting current, utilize current work heating ice-melt.Adopting method of the present invention to load ice melting current to overhead ground wire makes overhead ground wire self-heating temperature raise, thus effectively melts the icing on it.

Description

A kind of power transmission line overhead ground wire electric current de-icing method
Technical field
The present invention relates to a kind of power transmission line overhead ground wire electric current de-icing method, be applicable to and there is the transmission line de-icing that single overhead ground wire is also applicable to two overhead ground wires.
Background technology
The electric current of the current ratio transmission pressure of power transmission line overhead ground wire is much smaller, so easier icing.Overhead ground wire sag after icing becomes large, the sag requirement of transmission line to its overhead ground wire can not be met, when wind is waved, be easy to flashover occurs between the transmission pressure and overhead ground wire of transmission line, transmission line is tripped, affect the normal operation of transmission line, and may transmission line be damaged.Further, if steel tower two ends span does not wait or steel tower is in mountain area, overhead ground wire ice coverage makes steel tower be subject to force unbalance, easily produces tower head and is bent, is out of shape the danger even fractureed, also may occur Iron tower incline or collapse time serious.
Overhead ground wire be mainly divided into common overhead ground wire as steel strand wire or good conductor ground wire and optical fiber composite overhead be called for short OPGW, common overhead ground wire mainly adopts the earthing mode by base ground connection and graded insulation single-point grounding, OPGW, owing to having the dual-use function of ground wire and communications optical cable concurrently, generally adopts the earthing mode by base ground connection.For the overhead ground wire by base ground connection, be difficult to the Direct Current ice-melt realizing overhead ground wire.Sometimes in order to overhead ground wire ice-melt, the way of taking to remove the another frame new line of former overhead ground wire is even needed.Also the use mechanical deicing method had, passive deicing method etc., but deicing effect is not good.
Summary of the invention
Technical problem to be solved by this invention is, a kind of new power transmission line overhead ground wire de-icing method is proposed, utilize de-icing method of the present invention, effectively can carry out ice-melt to overhead ground wire, avoid the appearance of the problem such as transmission line flashover, steel tower distortion caused due to overhead ground wire ice coverage, and during ice-melt, without the need to removing overhead ground wire, method is implemented convenient, applied widely, provides effective way for solving overhead ground wire ice-melt problem.
Technical problem to be solved by this invention is achieved through the following technical solutions:
A kind of power transmission line overhead ground wire electric current de-icing method, is characterized in that, comprise the steps:
S1) determine the ice-melt length of the overhead ground wire needing ice-melt according to overhead ground wire ice coverage degree, determine the voltage of ice-melt power supply, selection has the ground insulator of suitable mechanical strength and determines its portable protective gaps distance d;
S2) under using described ground insulator every bar overhead ground wire insulation to be drawn respectively, and by grounding switch ground connection, when transmission line normally runs, described overhead ground wire is by closed grounding switch reliable ground, during ice-melt, grounding switch disconnects, overhead ground wire insulation against ground;
S3) will the end of the overhead ground wire of ice-melt and another overhead ground wire near it or the transmission pressure of having stopped transport be needed by shorting stub short circuit, and another overhead ground wire needed near the top of the overhead ground wire of ice-melt and described its or the described transmission pressure of having stopped transport are accessed described ice-melt power supply form ice-melt loop, open described ice-melt power supply, in described ice-melt loop, produce ice melting current, utilize current work heating ice-melt.
Being the circuit of graded insulation for overhead ground wire, when carrying out overhead ground wire ice-melt, being communicated with the adjacent overhead ground wire section of on each bar overhead ground wire within the scope of determined ice-melt each section by jumper to form ice-melt loop.Circuit for insulation completely or insulation single-point grounding does not completely have waypoint, then without the need to using jumper due in the middle of circuit.
Described step S1) realize especially by following steps:
S1.1) ground insulator with suitable mechanical strength is selected according to its load, material requirements and mounting means;
S1.2) ice-melt supply voltage is selected according to overhead ground wire ice coverage degree and ice-melt length;
S1.3) according to the portable protective gaps distance d of described ice-melt supply voltage determination ground insulator;
S1.4) judge whether the discharge voltage of portable protective gaps distance d is less than the flashover voltage of ground insulator;
S1.5) if step S1.4) be false, then reduce ice-melt supply voltage and ice-melt length, return step S1.3); If step S1.4) set up, determine that ground insulator portable protective gaps distance is for d.
Described shorting stub model is identical with above-mentioned overhead ground wire, and described overhead ground wire is identical with another overhead ground wire model described.
Described ice-melt power supply is DC ice melting power supply or exchanges ice-melt power supply.
Hinge structure of the present invention has following beneficial effect:
1. effectively overhead ground wire ice-melt can be carried out: adopt method of the present invention to load ice melting current to overhead ground wire and make overhead ground wire self-heating, temperature raises, thus the icing effectively melted on it, effectively can avoid the problem such as transmission line flashover, steel tower distortion caused due to overhead ground wire ice coverage, and during ice-melt, without the need to removing overhead ground wire, it is convenient to implement; The present invention has carried out ice-melt to Qingyuan Area overhead ground wire, and result shows that method of the present invention can effectively solve overhead ground wire ice coverage problem, is conducive to the normal operation ensureing the electric power system ice age;
2. applied widely: to consider the situation that only there is single overhead ground wire He there are two overhead ground wires in method of the present invention, be suitable for the overhead transmission line of different electric pressure; The present invention is applicable to overhead ground wire insulation completely, by situations such as base ground connection, graded insulation single-point groundings, applied widely;
3. cost is low: relative to losses such as the line outage caused because of overhead ground wire ice coverage, transmission line scaling loss, steel tower damages, the accessory cost used in de-icing method of the present invention is lower.
Accompanying drawing explanation
Fig. 1 is step S1 of the present invention) FB(flow block);
Fig. 2 is the structural representation by grounding switch ground connection under overhead ground wire of the present invention insulation is drawn;
Fig. 3 is the structural representation being communicated with two adjacent overhead ground wire sections by jumper;
Fig. 4 is the structural representation of single overhead ground wire-wire ice-melt mode of connection;
Fig. 5 is the structural representation of two overhead ground wire ice-melt modes of connection.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is step S1 of the present invention) idiographic flow block diagram; step S1) mainly need to determine to need the ice-melt length of the overhead ground wire of ice-melt, determine ice-melt supply voltage, select to have the ground insulator of suitable mechanical strength and determine its portable protective gaps distance d, concrete steps are as follows:
S1.1) ground insulator with suitable mechanical strength is selected according to its load, material requirements and mounting means;
S1.2) ice-melt supply voltage is selected according to overhead ground wire ice coverage degree and ice-melt length;
S1.3) according to the portable protective gaps distance d of described ice-melt supply voltage determination ground insulator;
S1.4) judge whether the discharge voltage of portable protective gaps distance d is less than the flashover voltage of ground insulator, the discharge voltage of attention portable protective gaps distance d, the flashover voltage of ground insulator all need to consider its dry, wet situation;
S1.5) if step S1.4) set up; determine that ground insulator portable protective gaps distance is for d; if step S1.4) be false; then reduce ice-melt supply voltage and ice-melt length; because portable protective gaps distance d is closely related with ice-melt supply voltage, decrease ice-melt supply voltage herein, so the portable protective gaps distance d of ground insulator correspondingly should be reduced; and rejudge, namely return step S1.3).In the present embodiment, ice-melt power supply selects DC ice melting power supply.
Fig. 2 is the structural representation under the insulation of operation overhead ground wire is drawn, overhead ground wire 2 is supported by ground wire strain insulator at the cross-arm place of strain tower, and under using ground insulator 1 every bar overhead ground wire 2 insulation to be drawn respectively, and by grounding switch 3 ground connection, when transmission line normally runs, overhead ground wire 2 is by closed grounding switch 3 reliable ground, and during ice-melt, grounding switch 3 disconnects, overhead ground wire 2 insulation against ground.
As shown in Figure 3, be the circuit of graded insulation, be divided into some sections by whole piece overhead ground wire 2 for overhead ground wire 2, between each section, insulation disconnects and distinguishes ground connection.If the ice-melt length selected comprise the above-mentioned overhead ground wire section of more than a section, parallel groove clamp 7 can be adopted to be communicated with overhead ground wire section adjacent with each section for jumper 4 to form ice-melt loop.
Figure 4 and 5 are respectively the structural representation of single overhead ground wire-wire ice-melt mode of connection and the structural representation of two overhead ground wire ice-melt modes of connection.Wherein, single overhead ground wire-wire ice-melt mode of connection and two overhead ground wire ice-melt modes of connection are applicable to only to have the transmission line of an overhead ground wire respectively and have the transmission line of two or more overhead ground wires.
As shown in Figure 4, during operation overhead ground wire 2 ice-melt, disconnect the grounding switch 3 on overhead ground wire 2 grounding lead lower end, within the scope of ice-melt a two section adjacent overhead ground wire section is communicated with by jumper 4, by overhead ground wire 2 ice-melt section right-hand member and the transmission pressure 5 of having stopped transport near it by shorting stub 6 short circuit, left end and the transmission pressure 5 of having stopped transport near it access described DC ice melting power supply 8 and form ice-melt loop, open DC ice melting power supply 8, ice melting current is produced in described ice-melt loop, make overhead ground wire 2 self-heating, reach ice-melt object.
As shown in Figure 5, during ice-melt, grounding switch 3 on two overhead ground wires 2,2 ˊ grounding lead lower end is all disconnected, two sections that are gone up separately by within the scope of ice-melt two overhead ground wire 2,2 ˊ adjacent overhead ground wire sections adopt parallel groove clamp to pass through jumper 4,4 ˊ to be communicated with respectively, by the right-hand member short circuit of the shorting stub 6 identical with overhead ground wire model by two overhead ground wire 2,2 ˊ, and their left end is accessed described DC ice melting power supply 8 and form ice-melt loop.This kind of mode of connection, without the need to transmission pressure of stopping transport.DC ice melting power supply 8 of the present invention also replaceable one-tenth exchanges ice-melt power supply.

Claims (3)

1. a power transmission line overhead ground wire electric current de-icing method, is characterized in that, comprises the steps:
S1) determine the ice-melt length of the overhead ground wire needing ice-melt according to overhead ground wire ice coverage degree, determine the voltage of ice-melt power supply, selection has the ground insulator of suitable mechanical strength and determines its portable protective gaps distance d;
S2) under using described ground insulator every bar overhead ground wire insulation to be drawn respectively, and by grounding switch ground connection, when transmission line normally runs, described overhead ground wire is by closed grounding switch reliable ground, during ice-melt, grounding switch disconnects, overhead ground wire insulation against ground;
S3) will the end of the overhead ground wire of ice-melt and another overhead ground wire near it or the transmission pressure of having stopped transport be needed by shorting stub short circuit, and another overhead ground wire needed near the top of the overhead ground wire of ice-melt and described its or the described transmission pressure of having stopped transport are accessed described ice-melt power supply form ice-melt loop, open described ice-melt power supply, in described ice-melt loop, produce ice melting current, utilize current work heating ice-melt;
Being the circuit of graded insulation for overhead ground wire, when carrying out overhead ground wire ice-melt, being communicated with the adjacent overhead ground wire section of on each bar overhead ground wire within the scope of determined ice-melt each section by jumper to form ice-melt loop;
Described step S1) realize as follows:
S1.1) ground insulator with suitable mechanical strength is selected according to its load, material requirements and mounting means;
S1.2) ice-melt supply voltage is selected according to overhead ground wire ice coverage degree and ice-melt length;
S1.3) according to the portable protective gaps distance d of described ice-melt supply voltage determination ground insulator;
S1.4) judge whether the discharge voltage of portable protective gaps distance d is less than the flashover voltage of ground insulator;
S1.5) if step S1.4) be false, then reduce ice-melt supply voltage and ice-melt length, return step S1.3); If step S1.4) set up, determine that ground insulator portable protective gaps distance is for d.
2. power transmission line overhead ground wire electric current de-icing method according to claim 1, is characterized in that, described shorting stub model is identical with above-mentioned overhead ground wire.
3. power transmission line overhead ground wire electric current de-icing method according to claim 1, is characterized in that, described ice-melt power supply is DC ice melting power supply or exchanges ice-melt power supply.
CN201210232535.2A 2012-07-06 2012-07-06 A kind of power transmission line overhead ground wire electric current de-icing method CN102780193B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103247992B (en) * 2013-05-07 2016-04-20 陈广生 The direct current ice melting method of the common overhead ground wire of transmission line and OPGW
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
CN103971974A (en) * 2014-04-04 2014-08-06 国家电网公司 Double-insulator ice-melting grounding disconnector
CN105281275B (en) * 2014-06-16 2017-07-21 南京电力金具设计研究院有限公司 A kind of electrical control gear for ground wire deicing automatic connection device
CN105322493B (en) * 2014-06-16 2017-07-07 中国南方电网有限责任公司超高压输电公司 A kind of ground wire deicing automatic connection device
CN104332929A (en) * 2014-11-26 2015-02-04 国家电网公司 Single-ground wire ice melting method
CN105826889A (en) * 2015-01-08 2016-08-03 罗日成 Transmission line charged segmented DC ice melting method
CN104577927B (en) * 2015-01-21 2017-01-25 武汉大学 Self-adaption composite heating power ice melting cooperating method
CN104734100A (en) * 2015-04-08 2015-06-24 国家电网公司 Rectifier valve bank unit of extra-high voltage ground wire direct-current deicing device
CN105262001A (en) * 2015-11-24 2016-01-20 国网四川省电力公司电力科学研究院 Ice melting method for overhead ground wire of power transmission line
CN105911441A (en) * 2016-05-05 2016-08-31 中国电力科学研究院 Method and system for icing floashover test of OPGW insulator chain
CN105866642A (en) * 2016-05-05 2016-08-17 中国电力科学研究院 Method and system for performing pollution flashover testing on OPGW insulator chain
CN106169729A (en) * 2016-08-23 2016-11-30 中国电力工程顾问集团西南电力设计院有限公司 A kind of transmission line of electricity roundabout series connection ground wire de-icing method
CN106159798A (en) * 2016-08-23 2016-11-23 中国电力工程顾问集团西南电力设计院有限公司 A kind of transmission line of electricity connection in series-parallel mixing ground wire de-icing method
CN107368650B (en) * 2017-07-19 2019-12-10 武汉大学 Method for formulating tower line system ice melting strategy through orthogonal analysis
CN107658778A (en) * 2017-10-08 2018-02-02 国网江西省电力公司电力科学研究院 A kind of quick de-icing method of distribution network line

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101667722A (en) * 2008-09-05 2010-03-10 唐翊程 Method for melting ice and snow on power transmission and distribution lines by low voltage and high current
CN102255274A (en) * 2011-08-03 2011-11-23 南方电网科学研究院有限责任公司 Direct-current de-icing method of overhead ground wire and composite optical fibre ground wire

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167319A (en) * 1985-01-18 1986-07-29 Sumitomo Electric Industries Overhead ground wire on which snow is difficult to adhere
JPS61167318A (en) * 1985-01-18 1986-07-29 Sumitomo Electric Industries Overhead ground wire icing ice preventive device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101667722A (en) * 2008-09-05 2010-03-10 唐翊程 Method for melting ice and snow on power transmission and distribution lines by low voltage and high current
CN102255274A (en) * 2011-08-03 2011-11-23 南方电网科学研究院有限责任公司 Direct-current de-icing method of overhead ground wire and composite optical fibre ground wire

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"超高压线路抗冰灾技术研究";林捷;《万方数据库》;20120531;第43-47页 *
"输电线路架空地线融冰法";程端肃;《电力技术》;19800930;第55-56页 *

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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8

Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD.

Patentee after: Wuhan University

Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8

Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation

Patentee before: Wuhan University

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