CN109212368B - Method for evaluating lightning current ablation resistance of ground wire of power transmission line - Google Patents
Method for evaluating lightning current ablation resistance of ground wire of power transmission line Download PDFInfo
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- CN109212368B CN109212368B CN201811303646.1A CN201811303646A CN109212368B CN 109212368 B CN109212368 B CN 109212368B CN 201811303646 A CN201811303646 A CN 201811303646A CN 109212368 B CN109212368 B CN 109212368B
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Abstract
The invention discloses a method for evaluating lightning current ablation resistance of a conductive ground wire of a power transmission line, which comprises the following steps: the method comprises the steps of obtaining quantitative evaluation data of 5 aspects by testing the relation between 5 aspects of different wire section sizes, wire single-strand diameters, lightning current sizes, lightning current waveform types and residual breaking forces and the lightning current ablation resistance of the conductive and ground wires of the power transmission line respectively, comprehensively evaluating the lightning current ablation resistance of the conductive and ground wires of the power transmission line, and providing technical support for lightning current ablation resistance of the conductive and ground wires of the power transmission line, so that the safe and stable operation of a power grid is guaranteed.
Description
Technical Field
The invention belongs to the technical field of lightning current ablation resistance of a conductive ground wire of a power transmission line, and particularly relates to a lightning current ablation resistance evaluation method of the conductive ground wire of the power transmission line.
Background
The broken strand of the lightning conduction ground wire is not easy to discover, the broken strand and broken wire of the ground wire are easy to expand and cause short circuit to the ground, the broken strand of the ground wire loses mechanical strength, and once the broken wire occurs, multi-tower chain accidents are easy to cause, so that the operation of a power grid is greatly influenced, and at present, a plurality of lightning strike broken strand accidents occur in various places, and great threats are caused to the safety of the power grid and the personal safety. Therefore, at present, the evaluation research on the lightning current ablation resistance of the ground wire of the power transmission line is urgently needed to be carried out, so that the ground wire with good lightning current ablation resistance is provided for a power grid, and the safe and stable operation of the power grid is guaranteed.
Disclosure of Invention
The technical problem solved by the invention is as follows: the method for evaluating the lightning current ablation resistance of the ground wire of the power transmission line is provided, and the technical problems in the prior art are solved.
The technical scheme adopted by the invention is as follows: a method for evaluating lightning current ablation resistance of a conductive ground wire of a power transmission line comprises the following steps:
step 1: the lightning current ablation platform of the ground wire of the power transmission line is utilized, and the selected sections are respectively 50mm2，70 mm2、95 mm2、120 mm2、150 mm2、180 mm2、210 mm2、240 mm2、300 mm2And 400 mm2Applying lightning currents with the same amplitude to the ten types of ground wires of the power transmission line with ten specifications respectively to obtain the relationship between the section size of the ground wire and the ablation degree of the ground wire;
step 2: selecting ground wires with the same cross section and different strand numbers, and applying lightning current with the same amplitude to the ground wires to obtain the relation between the single-strand diameter of the ground wires and the ablation degree of the ground wires;
and step 3: applying different lightning current amplitude values to the ten specifications of ground wires selected in the step 1 respectively to obtain the relationship between the lightning current amplitude values and the ablation degree of the ground wires;
and 4, step 4: respectively applying an A component lightning current waveform, a B component lightning current waveform, a C component lightning current waveform and a D component lightning current waveform to the conductive ground wires of the ten specifications selected in the step 1 to obtain the relationship between the lightning current waveform type and the ablation degree of the conductive ground wires;
and 5: respectively carrying out residual breaking force tests on the ground wire samples in the step 1 and the step 4 to obtain the relation between the residual breaking force of the tested ground wire and the ablation degree of the ground wire;
and (4) quantitatively evaluating the lightning current ablation resistance of the ground wire of the power transmission line by obtaining the section size of the ground wire, the single-strand diameter of the ground wire, the lightning current size, the waveform type of the lightning current and the residual breaking force through the steps 1 to 5.
The invention has the beneficial effects that: compared with the prior art, the method has the advantages that quantitative data comprehensive evaluation is carried out on the lightning current ablation resistance of the conductive ground wire of the power transmission line in five aspects of the section size of the conductive ground wire, the single-strand diameter of the conductive ground wire, the magnitude of the lightning current, the waveform type of the lightning current and the residual breaking force, and technical support is provided for lightning-resistant type selection of the conductive ground wire of the power transmission line, so that the safe and stable operation of a power grid is guaranteed.
Drawings
FIG. 1 is a schematic diagram of the evaluation of the present invention;
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1, a method for evaluating lightning current ablation resistance of a conductive ground wire of a power transmission line includes the following steps:
step 1: the lightning current ablation platform of the ground wire of the power transmission line is utilized, and the selected sections are respectively 50mm2，70 mm2、95 mm2、120 mm2、150 mm2、180 mm2、210 mm2、240 mm2、300 mm2And 400 mm2Applying lightning currents with the same amplitude to the ten types of ground wires of the power transmission line with ten specifications respectively to obtain the relationship between the section size of the ground wire and the ablation degree of the ground wire;
step 2: selecting ground wires with the same cross section and different strand numbers, and applying lightning current with the same amplitude to the ground wires to obtain the relation between the single-strand diameter of the ground wires and the ablation degree of the ground wires;
and step 3: applying different lightning current amplitude values to the ten specifications of ground wires selected in the step 1 respectively to obtain the relationship between the lightning current amplitude values and the ablation degree of the ground wires;
and 4, step 4: respectively applying an A component lightning current waveform, a B component lightning current waveform, a C component lightning current waveform and a D component lightning current waveform to the conductive ground wires of the ten specifications selected in the step 1 to obtain the relationship between the lightning current waveform type and the ablation degree of the conductive ground wires;
and 5: respectively carrying out residual breaking force tests on the ground wire samples in the step 1 and the step 4 to obtain the relation between the residual breaking force of the tested ground wire and the ablation degree of the ground wire;
and (4) quantitatively evaluating the lightning current ablation resistance of the ground wire of the power transmission line by obtaining the section size of the ground wire, the single-strand diameter of the ground wire, the lightning current size, the waveform type of the lightning current and the residual breaking force through the steps 1 to 5.
According to the standard SAE ARP 5412A-2005, the four component waveforms and parameters of lightning current A, B, C, D are specified as follows:
lightning current component A, initial peak current, peak value of 200 +/-20 kA, duration less than or equal to 500 mu s, and action integral of 2X 106 +/-0.4X 106A2 ∙ s. The component may be unidirectional or oscillatory, and the waveform is not specified.
The lightning current component B, the intermediate current, has an average amplitude of 2 +/-0.2 kA, a maximum duration of 5ms, a maximum charge transfer of 10C, and a waveform which is not specified but must be unidirectional.
The lightning current component C, the continuous current, the peak value of 200-800A, the duration of 0.25-1s, the transferred charge amount of 200 + -40C, the waveform is not specified, but must be unidirectional.
The lightning current component D is a repeated discharge current, has a peak value of 100 +/-10 kA, a duration of less than or equal to 500 mu s and an action integral of 0.25 multiplied by 106 +/-0.05 multiplied by 106A2 ∙ s, can be unidirectional or oscillatory, and has a wave shape which is not specified.
The lightning current A-D components respectively represent the first return current, the middle current, the continuous current and the subsequent return current part of the lightning current in the actual lightning stroke, and different components have different amplitudes and durations.
Quantitative data of 5 aspects obtained by the invention. Technical support is provided for lightning-resistant selection of the conducting wire and the grounding wire of the power transmission line, and therefore safe and stable operation of a power grid is guaranteed.
The above description is only an example of the specific embodiments of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art can easily find out the modifications or alterations within the technical scope of the present disclosure, which should be covered by the protection scope of the present disclosure. For this reason, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (1)
1. A method for evaluating lightning current ablation resistance of a conductive ground wire of a power transmission line is characterized by comprising the following steps: the method comprises the following steps:
step 1: the lightning current ablation platform of the ground wire of the power transmission line is utilized, and the selected sections are respectively 50mm2，70 mm2、95 mm2、120 mm2、150 mm2、180 mm2、210 mm2、240 mm2、300 mm2And 400 mm2Applying lightning currents with the same amplitude to the ten types of ground wires of the power transmission line with ten specifications respectively to obtain the relationship between the section size of the ground wire and the ablation degree of the ground wire;
step 2: selecting ground wires with the same cross section and different strand numbers, and applying lightning current with the same amplitude to the ground wires to obtain the relation between the single-strand diameter of the ground wires and the ablation degree of the ground wires;
and step 3: applying different lightning current amplitude values to the ten specifications of ground wires selected in the step 1 respectively to obtain the relationship between the lightning current amplitude values and the ablation degree of the ground wires;
and 4, step 4: respectively applying an A component lightning current waveform, a B component lightning current waveform, a C component lightning current waveform and a D component lightning current waveform to the conductive ground wires of the ten specifications selected in the step 1 to obtain the relationship between the lightning current waveform type and the ablation degree of the conductive ground wires;
and 5: respectively carrying out residual breaking force tests on the ground wire samples in the step 1 and the step 4 to obtain the relation between the residual breaking force of the tested ground wire and the ablation degree of the ground wire;
and (4) quantitatively evaluating the lightning current ablation resistance of the ground wire of the power transmission line by obtaining the section size of the ground wire, the single-strand diameter of the ground wire, the lightning current size, the waveform type of the lightning current and the residual breaking force through the steps 1 to 5.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281226A (en) * | 2008-05-27 | 2008-10-08 | 保定天威集团有限公司 | Conducting wire great current impact test method |
| CN102707210A (en) * | 2012-06-29 | 2012-10-03 | 中国能源建设集团广东省电力设计研究院 | Anti-lightning evaluation method and device of high-voltage overhead power transmission line |
| CN203950481U (en) * | 2014-02-08 | 2014-11-19 | 天津市静海县实验中学 | A kind of circuit demonstration device that burns because electric current is excessive |
| CN104635071A (en) * | 2013-11-14 | 2015-05-20 | 海洋王（东莞）照明科技有限公司 | Cable current resistance testing device and testing method |
| CN106841809A (en) * | 2016-12-28 | 2017-06-13 | 国家电网公司 | Multifunctional cable tester |
| CN108594047A (en) * | 2018-06-08 | 2018-09-28 | 国家电网公司 | A method of based on transmission line of electricity damage to crops caused by thunder dangerous point risk identification |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3524320B2 (en) * | 1997-04-18 | 2004-05-10 | 中部電力株式会社 | Withstand voltage test method for rubber and plastic insulated power cables |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281226A (en) * | 2008-05-27 | 2008-10-08 | 保定天威集团有限公司 | Conducting wire great current impact test method |
| CN102707210A (en) * | 2012-06-29 | 2012-10-03 | 中国能源建设集团广东省电力设计研究院 | Anti-lightning evaluation method and device of high-voltage overhead power transmission line |
| CN104635071A (en) * | 2013-11-14 | 2015-05-20 | 海洋王（东莞）照明科技有限公司 | Cable current resistance testing device and testing method |
| CN203950481U (en) * | 2014-02-08 | 2014-11-19 | 天津市静海县实验中学 | A kind of circuit demonstration device that burns because electric current is excessive |
| CN106841809A (en) * | 2016-12-28 | 2017-06-13 | 国家电网公司 | Multifunctional cable tester |
| CN108594047A (en) * | 2018-06-08 | 2018-09-28 | 国家电网公司 | A method of based on transmission line of electricity damage to crops caused by thunder dangerous point risk identification |
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