CN109444684A - A kind of shaft tower impact characteristics test method with route - Google Patents

A kind of shaft tower impact characteristics test method with route Download PDF

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Publication number
CN109444684A
CN109444684A CN201811319887.5A CN201811319887A CN109444684A CN 109444684 A CN109444684 A CN 109444684A CN 201811319887 A CN201811319887 A CN 201811319887A CN 109444684 A CN109444684 A CN 109444684A
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CN
China
Prior art keywords
current
voltage
tower
shaft tower
test
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.)
Pending
Application number
CN201811319887.5A
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Chinese (zh)
Inventor
鲁海亮
文习山
李纯
方超颖
郑钟楠
王晓杰
谢文炳
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.)
Wuhan University WHU
Fujian Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd
Original Assignee
Wuhan University WHU
Fujian Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd
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Publication date
Application filed by Wuhan University WHU, Fujian Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd filed Critical Wuhan University WHU
Priority to CN201811319887.5A priority Critical patent/CN109444684A/en
Publication of CN109444684A publication Critical patent/CN109444684A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/28Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform

Abstract

The invention belongs to anti-thunder technical fields, more particularly to a kind of shaft tower impact characteristics test method with route, test loop is built using the direct method of measurement, one end of testing current conducting wire is set to head of mast, and the other end connects impulse current generator, and extracted current to reflux pole is grounded again;One end of voltage tester conducting wire is set to head of mast, and the other end to voltage pole is grounded;Apply dash current simulation lightning stroke shaft tower tower top to head of mast by testing current conducting wire, measures the voltage and current at tower top and obtain the impact impedance at tower top;By measuring the voltage and current of shaft tower different location, shaft tower overvoltage spatial and temporal distributions characteristic caused by being struck by lightning is obtained.The result of the test method considers the influence of route, such as the shunting function of lightning conducter, the electromagnetic coupling of route and tower body, and test result contain route, shaft tower, between earthing or grounding means wave catadioptric, the case where obtaining result more closing to reality lightning stroke situation.The lightning impulse of different incidence angles can also be simulated.

Description

A kind of shaft tower impact characteristics test method with route
Technical field
The invention belongs to anti-thunder technical field more particularly to a kind of shaft tower impact characteristics test methods with route.
Background technique
China's power industry rapidly develops, and the requirement to transmission line of electricity power supply reliability is higher and higher, simultaneous electricity The development of net, the caused tripping of transmission line of lightning strike, power outage are also increasing.In order to rationally, economically protect power train For system from lightning stroke, overvoltage caused by accurately prediction is struck by lightning is highly important.The lightning performance of transmission line of electricity depends on being permitted Multi-parameter, such as the wave impedance of tower-footing impedance, tower body, the diverting coefficient of lightning conducter, corona discharge, the wherein impact of shaft tower Impedance is an important parameter for determining power transmission line lightning shielding performance.
Since shaft tower height is larger, need to apply electric current in tower top in testing, actual test difficulty is larger.Current power transmission Route lightning stroke transient characterisitics research depends critically upon EM transient calculation simulation software, it will usually largely be simplified, calculate knot Fruit and actual conditions may have larger difference.If EMTP assumes that electromagnetic wave is propagated with transverse electromagnetic wave, for structure is complicated, Larger-size electric power line pole tower, be struck by lightning shaft tower when along shaft tower propagate electromagnetic wave be not transverse electromagnetic wave.
And current experimental study is mainly for earthing or grounding means, has ignored route, shaft tower, wave is catadioptric between earthing or grounding means It penetrates, is had differences with actual conditions.Experimental study for tower body is mostly subscale test, and measuring device is relative to entire measurement system Size of uniting is larger, be easy to cause biggish error, cannot react actual conditions well.Although also there is research directly to true type bar Tower has carried out experimental study, but subjects are independent shaft tower, the influence of route are not considered, such as the tapping condition of lightning conducter, line Road and the electromagnetic coupling of tower body etc..
Summary of the invention
The object of the present invention is to provide a kind of shaft tower impacts of consideration line influence measurement result more closing to reality lightning stroke Characteristic test method.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of shaft tower impact characteristics test side with route Method builds test loop using the direct method of measurement, and one end of testing current conducting wire is set to head of mast, other end connection impact Extracted current to reflux pole is grounded current feedback circuit again;One end of voltage tester conducting wire is set to head of mast, the other end to electricity Press pole ground connection;Apply dash current simulation lightning stroke head of mast to head of mast by testing current conducting wire, measures at tower top Voltage and current obtains the impact impedance at tower top;By measuring the voltage and current of shaft tower different location, obtains lightning stroke and cause Shaft tower overvoltage spatial and temporal distributions characteristic;The following steps are included:
Step 1 collects landform locating for shaft tower relevant parameter and investigation shaft tower;
Step 2, according to field condition, determine the position of current reflux pole and voltage pole;
Step 3 lays auxiliary earth pole according to the position that step 2 determines, builds test loop using balloon;
Step 4, the current-responsive that different location is measured using Rogowski coil, using voltage sensor measurement different location Voltage responsive;Voltage, current measurement signal are by being wirelessly transmitted to host;
Step 5, the output waveform for adjusting impulse current generator, it is full until the wave front time of dash current and wave rear time Sufficient relevant criterion measurement request;
Step 6 applies dash current, records the voltage current waveform of each measurement point, obtains space division when shaft tower overvoltage Cloth characteristic.
In the above-mentioned shaft tower impact characteristics test method with route, test loop is built using balloon described in step 3 Specific step is as follows: propping up testing current conducting wire and voltage tester conducting wire by balloon, places it in head of mast plane;Electricity 180 ° and perpendicular to tower body each other of current test conducting wire and voltage tester conducting wire;And make current reflux pole as far as possible far from tower body.
In the above-mentioned shaft tower impact characteristics test method with route, the test lead and bar propped up by changing balloon The angle of tower, to simulate the lightning impulse of different incidence angles.
In the above-mentioned shaft tower impact characteristics test method with route, to the voltage measurement of different location described in step 4 It is carried out simultaneously in one-shot test with current measurement.
Beneficial effects of the present invention: method test result of the invention considers the influence of route, such as the shunting of lightning conducter Effect, the electromagnetic coupling of route and tower body, and test result contain route, shaft tower, between earthing or grounding means wave catadioptric, obtain To the case where result more closing to reality be struck by lightning situation.Measurement result is reduced between measurement lead and is measured by wireless transmission Electromagnetic interference between lead and measurement object.Measure traverse line is propped up using balloon, the angle of measure traverse line and shaft tower can be changed, To simulate the lightning impulse of different incidence angles.In one-shot measurement, the shock response of shaft tower plurality of positions can simultaneously obtain, improve The repeatability of measurement.
Detailed description of the invention
Fig. 1 is the schematic diagram that one embodiment of the invention measures circuit;
Fig. 2 is that one embodiment of the invention measures circuit side view.
Specific embodiment
Embodiments of the present invention are described in detail with reference to the accompanying drawing.
The technical solution of the present embodiment is to build test loop, test loop such as Fig. 1 and Fig. 2 institute using the direct method of measurement Show.When applying dash current at the top of test object, which is equivalent to lightning strike spot, and dash current understands some at this time It flows through tower body and ground is entered by grounding body, another part is then flowed away by lightning conducter.By the voltage at measurement tower top and it is somebody's turn to do The impact impedance at this can be obtained in the electric current at place.Multiple voltage measurement points are set simultaneously, shaft tower caused by lightning stroke can be obtained Overvoltage spatial and temporal distributions characteristic.
The technical scheme comprises the following steps for the present embodiment:
The first step collects landform locating for shaft tower relevant parameter and investigation shaft tower.
Second step determines the arrangement of test loop according to the size of landform and shaft tower, essentially consists in determining electric current and returns Flow the position of pole and Voltage Reference pole.Due between measure traverse line and measure traverse line and tower body, route all have electromagnetism coupling It closes, result can be interfered, test lead circuit should use mode as shown in Figure 1, and testing current conducting wire is led with voltage tester Line is 180 °, and all perpendicular to route, to reduce the electromagnetic coupling between test lead and between test lead and route, and in order to It is further reduced the electromagnetic coupling of test lead and tower body, test lead is propped up using balloon, makes test lead perpendicular to tower Body, and consider the coupling of test lead vertical component and tower body, current reflux pole should as far as possible a little further.
Third step builds test loop by Fig. 1 mode, and multiple voltage measurement points are arranged in shaft tower different location and electric current is surveyed Amount point;The current-responsive that different location is measured by Rogowski coil is measured the voltage at different location and is rung using voltage sensor It answers, as shown in Figure 2.The measuring signal of voltage and current is all made of wireless transmission, to reduce the arrangement of signal transmssion line, further subtracts Electromagnetic interference between small measuring system.
4th step adjusts the output waveform of impulse current generator, wave front time and wave rear time until dash current Meet relevant criterion measurement request.
5th step applies dash current, records the voltage current waveform of measurement point.
The above method does not consider the case where tower grounding body spark discharge, when considering that spark effect, need to only use great Rong The impulse current generator of amount exports bigger dash current, and voltage responsive also will increase at this time, to avoid damage voltage Sensor needs to install high-voltage probe or divider additional in measurement point.But it is limited by the volume of large capacity impulse current generator And weight, it is more convenient using small-sized impulse current generator.
When it is implemented, building test loop using the direct method of measurement, one end of testing current conducting wire is set to shaft tower Top, the other end connects impulse current generator, and to reflux pole ground connection, one end of voltage tester conducting wire is set to extracted current again The other end of head of mast, voltage tester conducting wire is grounded by voltage pole;Testing current conducting wire and voltage tester conducting wire are 180 °, And all perpendicular to route;Test lead is propped up using balloon, makes test lead perpendicular to tower body, and current reflux pole Ying Jinliang A little further.
Impulse current generator applies dash current simulation lightning stroke to head of mast by testing current conducting wire, measures tower top The voltage and current at place obtains the impact impedance at tower top, by measuring shaft tower different location voltage and current, obtains lightning stroke and draws The shaft tower overvoltage spatial and temporal distributions characteristic risen;The following steps are included:
(1) landform locating for shaft tower relevant parameter and investigation shaft tower is collected.
(2) it according to field condition, determines the arrangement in measurement circuit, essentially consists in determining current reflux pole and voltage pole Position.
(3) auxiliary earth pole is laid in identified position in previous step, builds test loop as shown in Figure 1.It is wherein sharp With balloon by test lead prop up come.
(4) as shown in Figure 1, Rogowski coil is arranged in current measurement point, as shown in Fig. 2, voltage is arranged in voltage measurement point Sensor, an end Jie measurement point of voltage sensor, other end connects together to be connected with voltage pole.Voltage and current measurement letter Number by being wirelessly transmitted on host.
(5) parameter for adjusting impulse current generator, makes the 8/20us lightning current wave of its outputting standard.
(6) apply dash current, record the voltage current waveform of each measurement point.
Test result considers the influence of route, such as the shunting function of lightning conducter, the electromagnetic coupling of route and tower body, and survey Test result contain route, shaft tower, between earthing or grounding means wave catadioptric, the case where obtaining result more closing to reality lightning stroke feelings Condition.The electromagnetic interference as caused by test loop is reduced using the measuring device of wireless transmission.Multiple points are measured simultaneously, obtain bar The spatial and temporal distributions characteristic of tower overvoltage.Measure traverse line is propped up using balloon, the angle of measure traverse line and shaft tower can be changed, with simulation The lightning impulse of different incidence angles.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
Although being described in conjunction with the accompanying a specific embodiment of the invention above, those of ordinary skill in the art should Understand, these are merely examples, various deformation or modification can be made to these embodiments, without departing from original of the invention Reason and essence.The scope of the present invention is only limited by the claims that follow.

Claims (4)

1. a kind of shaft tower impact characteristics test method with route, characterized in that build test loop using the direct method of measurement, electricity One end of current test conducting wire is set to head of mast, and extracted current to reflux pole connects other end connection impulse current generator again Ground;One end of voltage tester conducting wire is set to head of mast, and the other end to voltage pole is grounded;By testing current conducting wire to shaft tower Top applies dash current simulation lightning stroke head of mast, measures the voltage and current at tower top and obtains the impact impedance at tower top; By measuring the voltage and current of shaft tower different location, shaft tower overvoltage spatial and temporal distributions characteristic caused by being struck by lightning is obtained;Including with Lower step:
Step 1 collects landform locating for shaft tower relevant parameter and investigation shaft tower;
Step 2, according to field condition, determine the position of current reflux pole and voltage pole;
Step 3 lays auxiliary earth pole according to the position that step 2 determines, builds test loop using balloon;
Step 4, the current-responsive that different location is measured using Rogowski coil, using the voltage of voltage sensor measurement different location Response;Voltage, current measurement signal are by being wirelessly transmitted to host;
Step 5, the output waveform for adjusting impulse current generator, until the wave front time of dash current and wave rear time meet phase Close canonical measure requirement;
Step 6 applies dash current, records the voltage current waveform of each measurement point, and it is special to obtain shaft tower overvoltage spatial and temporal distributions Property.
2. the shaft tower impact characteristics test method with route as described in claim 1, characterized in that utilize gas described in step 3 Ball builds test loop, and specific step is as follows: propping up testing current conducting wire and voltage tester conducting wire by balloon, places it in Head of mast plane;180 ° and perpendicular to tower body each other of testing current conducting wire and voltage tester conducting wire;And keep current reflux extremely most It measures far from tower body.
3. the shaft tower impact characteristics test method with route as claimed in claim 2, characterized in that propped up by changing balloon Test lead and shaft tower angle, to simulate the lightning impulse of different incidence angles.
4. the shaft tower impact characteristics test method with route as described in claim 1, characterized in that difference described in step 4 The voltage measurement and current measurement of position carry out simultaneously in one-shot test.
CN201811319887.5A 2018-11-07 2018-11-07 A kind of shaft tower impact characteristics test method with route Pending CN109444684A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110456237A (en) * 2019-07-19 2019-11-15 清华大学 Reduce the system and method for Injection Current waveform wave head time in the artificial lightning stroke experiment in transmission line of electricity scene
CN110501549A (en) * 2019-07-19 2019-11-26 武汉大学 A kind of measurement method of tower body impact high voltage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203587723U (en) * 2013-11-29 2014-05-07 国家电网公司 Power transmission tower pole lightning-protection testing device
CN103823101A (en) * 2014-03-14 2014-05-28 云南电力试验研究院(集团)有限公司电力研究院 Method for measuring impact current division coefficient of power transmission line tower with lightning conductor
CN106054039A (en) * 2016-07-12 2016-10-26 南方电网科学研究院有限责任公司 DC line tower transient impact performance detection system
CN106053993A (en) * 2016-07-12 2016-10-26 南方电网科学研究院有限责任公司 Thunder impulse response detection system of AC line tower

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203587723U (en) * 2013-11-29 2014-05-07 国家电网公司 Power transmission tower pole lightning-protection testing device
CN103823101A (en) * 2014-03-14 2014-05-28 云南电力试验研究院(集团)有限公司电力研究院 Method for measuring impact current division coefficient of power transmission line tower with lightning conductor
CN106054039A (en) * 2016-07-12 2016-10-26 南方电网科学研究院有限责任公司 DC line tower transient impact performance detection system
CN106053993A (en) * 2016-07-12 2016-10-26 南方电网科学研究院有限责任公司 Thunder impulse response detection system of AC line tower

Non-Patent Citations (1)

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Title
李光辉: "借助数字电磁分析仪测试杆塔的雷电冲击阻抗", 《水电科技进展》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110456237A (en) * 2019-07-19 2019-11-15 清华大学 Reduce the system and method for Injection Current waveform wave head time in the artificial lightning stroke experiment in transmission line of electricity scene
CN110501549A (en) * 2019-07-19 2019-11-26 武汉大学 A kind of measurement method of tower body impact high voltage

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