CN205016965U - Overhead transmission line lightning protection device and resistant thunder horizontal checkout system thereof - Google Patents

Overhead transmission line lightning protection device and resistant thunder horizontal checkout system thereof Download PDF

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Publication number
CN205016965U
CN205016965U CN201520833742.2U CN201520833742U CN205016965U CN 205016965 U CN205016965 U CN 205016965U CN 201520833742 U CN201520833742 U CN 201520833742U CN 205016965 U CN205016965 U CN 205016965U
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CN
China
Prior art keywords
lightning
shaft tower
wire
transmission line
impedance
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CN201520833742.2U
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Chinese (zh)
Inventor
张坤
郭建炎
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厦门理工学院
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Priority to CN201520833742.2U priority Critical patent/CN205016965U/en
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Publication of CN205016965U publication Critical patent/CN205016965U/en

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Abstract

The utility model discloses an overhead transmission line lightning protection device and resistant thunder horizontal checkout system thereof, including shaft tower, insulator chain, ground resistance and overhead ground wire, insulator chain arranges the both sides of shaft tower in, and shaft tower cross arm, lower extreme carry wire are linked to its upper end, the bottommost of ground resistance ground joint shaft tower, install the arrester on the lower shaft tower of resistant thunder level. Accredited testing organization includes power, lightning current, top impedance and terminal impedance, power and top impedance are established ties in wire top, the terminal and ground connection of terminal impedance series connection wire, and the lightning current is connected in the support side at its overhead ground wire place of shaft tower. The basis is novel can to make the lightning current energy of invasion wire obtain better release by provide the arrester at the resistant poor shaft tower of thunder, avoids the lightning current to invade the wire easily. Can accomplish the aassessment of the whole piece overhead transmission line counterattack horizontally of nai the thunder through this novel test system, make resistant thunder level value when according with national standard, lightning protection engineering cost significantly reduces.

Description

A kind of Lightning Protection on Power Transmission Lines protective device and lightning withstand level test macro thereof
Technical field
The utility model relates to high pressure overhead power line anti-thunder technical field, particularly relates to a kind of Lightning Protection on Power Transmission Lines protective device and lightning withstand level test macro thereof of high lightning withstand level.
Background technology
Along with the proposition that China's construction " sturdy power grid " is planned, to Electric Design lightning protection field safety, economical, reliable requirement is also more and more higher, circuit designed by requirement should meet national standard technically, cost is reasonable economically again, but the many Electric Power Design Institute of China still continue to use old regular method to carry out the design of transmission line lightning protection at present, both the communication process of lightning current in circuit and shaft tower had not been considered, the coupling effect between wire is not considered yet, in order to meet margin of safety, have to make result of design relatively conservative, thus the lightning protection cost of whole circuit is increased.
Utility model content
The purpose of this utility model is to provide a kind of Lightning Protection on Power Transmission Lines protective device and lightning withstand level test macro thereof, and it can greatly reduce lightning protection project cost under the prerequisite of satisfied national design standard margin of safety.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of Lightning Protection on Power Transmission Lines protective device, comprises shaft tower, insulator string, earth resistance and lightning conducter; Insulator string is placed in the both sides of shaft tower, its upper end link cross arm of tower, lower end carry wire; Ground resistance earth connects the bottommost of shaft tower; Lightning arrester installed by the shaft tower that lightning withstand level is lower.
Described lightning arrester is connected in parallel on the two ends of its both sides insulator string of shaft tower.
A kind of overhead transmission line lightning withstand level test macro, has lightning protection mechanism and mechanism for testing; Lightning protection mechanism comprises shaft tower, insulator string, earth resistance and lightning conducter; Insulator string is placed in the both sides of shaft tower, its upper end link cross arm of tower, lower end carry wire; Ground resistance earth connects the bottommost of shaft tower; Lightning arrester installed by the shaft tower that lightning withstand level is lower; Mechanism for testing comprises power supply, lightning current, top impedance and terminating impedance; Power supply and top impedance are series at wire top, terminating impedance series conductor end ground connection, and lightning current connects in the bracket side at its lightning conducter place of shaft tower.
Described shaft tower is many wave impedance.
Described many wave impedance, its lateral wave impedance is 160 Ω, and longitudinal wave impedance is 140 Ω.
The impulse corona circuit of ground connection is connected with between described lightning conducter and wire.
Described impulse corona circuit, its limit phase conductor impulse corona electric capacity is 10.247pF/m, and middle phase conductor impulse corona electric capacity is 10.135pF/m, and lightning conducter impulse corona electric capacity is 3.886pF/m.
Described lightning arrester is connected in parallel on the two ends of its both sides insulator string of shaft tower.
After adopting such scheme; this novel overhead transmission line lightning protection device, arranges lightning arrester by the shaft tower low at lightning withstand level, the lightning current energy of invasion wire can be made better to be discharged; the amplitude of the lightning current of invasion wire reduces, and avoids lightning current to invade wire easily.The assessment to whole piece overhead transmission line counterattack lightning withstand level can be completed by this novel test system, also be assessed by lightning arrester connected in parallel post debugging, make lightning withstand level value while meeting national standard, the advantage of lightning protection project cost can be greatly reduced.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this Novel lightning-proof protective device and lightning withstand level test macro thereof;
Fig. 2 is lightning current invasion conductor waveforms figure;
Fig. 3 is overhead transmission line lightning withstand level calculation flow chart.
Label declaration
Wire 1 shaft tower 21
Insulator string 22 lightning arrester 23
Earth resistance 24 lightning conducter 25
Power supply 31 top impedance 32
Terminating impedance 33 lightning current 34
Impulse corona circuit 35.
Embodiment
Below in conjunction with the drawings and specific embodiments, this case is described in further detail.
This case relates to a kind of Lightning Protection on Power Transmission Lines protective device, as shown in Figure 1, comprises shaft tower 21, insulator string 22, lightning arrester 23, earth resistance 24 and lightning conducter 25.
Transmission pressure 1 is erected on the shaft tower 21 that is arranged in order, and lightning conducter 25 is erected on the top of the shaft tower 21 be arranged in order.Insulator string 22 is arranged in pairs, is placed in the both sides of shaft tower 21 respectively, wherein upper end link shaft tower 21 cross-arm of insulator string 22, lower end carry wire 1.The bottommost of earth resistance 24 grounding connection shaft tower 21.Lightning arrester 23 is installed on the lower shaft tower of lightning withstand level 21, and preferably lightning arrester 23 is connected in parallel on the two ends of its both sides insulator string 22 of shaft tower 21.
This Novel lightning-proof protective device, mainly through installing lightning arrester 23 on the shaft tower 21 that lightning withstand level is lower, can make the lightning current energy of invasion wire 1 better discharge, and the amplitude of the lightning current of invasion wire 1 reduces.So, line lightning resisting level can be made to be improved and to meet national standard, be conducive to saving lightening protection engineering cost.
This case also relates to a kind of overhead transmission line lightning withstand level test macro, as shown in Figure 1, has lightning protection mechanism and mechanism for testing.Lightning protection mechanism lightning protection device as described above, comprises shaft tower 21, insulator string 22, lightning arrester 23, earth resistance 24 and lightning conducter 25.Specifically see described in above.Mechanism for testing comprises power supply 31, top impedance 32, terminating impedance 33 and lightning current 34.
Power supply 31 is AC power, and Power Level arranges 220kV, and initial phase is 0 degree.Top impedance 32 is circuit top mains side coupling wave impedance, and its and power supply 31 are series at wire 1 top, and terminating impedance 33 is that line end mates wave impedance, its series conductor 1 end ground connection.Lightning current 34 connects in the bracket side at its lightning conducter 25 place of shaft tower 21.The two ends at the whole story of lightning conducter 25 are connected on top impedance 32 and terminating impedance 33.
Preferably, described shaft tower 21 is many wave impedance, and specifically, its lateral wave impedance is 160 Ω, and longitudinal wave impedance is 140 Ω.
Preferably, be connected with the impulse corona circuit 35 of ground connection between lightning conducter 25 and wire 21, specifically, its limit phase conductor impulse corona electric capacity is 10.247pF/m, middle phase conductor impulse corona electric capacity is 10.135pF/m, and lightning conducter impulse corona electric capacity is 3.886pF/m.
Fig. 2 illustrates lightning current invasion conductor waveforms figure, wherein indicate the voltage-time curve of the insulator string that " 1 " provides for producer, indicating " 2 " is A phase insulator string both end voltage waveform, indicating " 3 " is B phase insulator string both end voltage waveform, and indicating " 4 " is C phase insulator string both end voltage waveform.When lightning current 35 hits shaft tower 1 lightning conducter bracket side, longitudinally earth resistance 24 is flowed on the one hand through shaft tower 21, laterally wire 1 is invaded on the one hand through shaft tower 1 cross-arm, if now the absolute value of voltage at insulator string 21 two ends is just crossing with the voltage-time curve of insulator string 21 itself, then insulator string 21 is breakdown, lightning current can invade wire 1 and propagate to circuit top and end both sides, derive oscillogram and can check the situation that the volt-second characteristic of insulator string 21 both end voltage waveform and insulator string 21 itself intersects, amplitude according to situation about intersecting and lightning current can complete the assessment of whole piece overhead transmission line being strikeed back to lightning withstand level, if assessed value does not meet national standard, then by reappraising after the lightning arrester 23 of debugging parallel connection, till satisfying condition.This lightning withstand level value, while meeting national standard, can reduce the advantage of lightning protection project cost in addition.
This novel test system is by setting up the accurate model of overhead transmission line each several part, and the process that the process that simulation corona can be made to occur, lightning current are propagated in shaft tower, the process of lightning current intrusion soil are more accurate.Coronal model considers electric capacity between wire and direct-to-ground capacitance, and Tower Model considers lightning current propagation horizontal and vertical in shaft tower.So, can make the result of calculation of lightning withstand level more close to actual, the result obtained than legacy procedures method is good, reduces line thunder protection cost.
In addition as shown in Figure 3, the utility model additionally provides overhead transmission line lightning withstand level assessment mode:
S001, utilizes electro-magnetic transient analysis program to set up the accurate model of each several part of overhead transmission line; Because the lightning stroke flashover order of each phase of overhead transmission line is not fixing, pass through electro-magnetic transient analysis program, analyze the flashover process of each phase of three-phase conducting wire, that phase that lightning withstand level is the weakest can be found out, emulate the optimum configurations of model according to Practical Project of foundation;
S002, runs electro-magnetic transient analysis program, improves constantly the amplitude of lightning current, and along with the carrying out calculated, amplitude of lightning current spacing value arranges more and more less, and computational accuracy is increasing; For obtaining the lightning withstand level of each phase conductor, comprise A, B, C three-phase counterattack lightning withstand level, as one of them embodiment, when calculating counterattack lightning withstand level, lightning current invasion lightning conducter support side, point selection shaft tower top, amplitude of lightning current initial value is set to 10kA, runs electro-magnetic transient analysis program;
S003, whether A, B, C three-phase insulator strings both end voltage waveform that observation is derived and the insulator string voltage-time curve that producer provides intersect, if non-intersect, continue the amplitude increasing lightning current, until intersect; Once intersect, then first write down the amplitude of lightning current in crossing moment, then reduce the amplitude of lightning current, until non-intersect, so repeatedly, until the two sets intersect moment amplitude of lightning current difference finally obtained reaches the precision of 0.01kA;
S004, compares simulation result and the calculated results, under the prerequisite meeting national standard, specification, provides a rational lightning withstand level value; Specifically, the lightning withstand level of A, B, C three-phase and the calculated results are compared, because the calculated results only has a mean value, in order to retain margin of safety, get that value minimum in A, B, C three-phase lightning withstand level that simulation calculation obtains, as final lightning withstand level recommended value.
The foregoing is only the preferred embodiment that this is novel, all equalizations done with this novel right change and modify, and all should belong to the scope of this novel claim.

Claims (8)

1. a Lightning Protection on Power Transmission Lines protective device, is characterized in that: comprise shaft tower, insulator string, earth resistance and lightning conducter; Insulator string is placed in the both sides of shaft tower, its upper end link cross arm of tower, lower end carry wire; Ground resistance earth connects the bottommost of shaft tower; Lightning arrester installed by the shaft tower that lightning withstand level is lower.
2. a kind of Lightning Protection on Power Transmission Lines protective device as claimed in claim 1, is characterized in that: described lightning arrester is connected in parallel on the two ends of its both sides insulator string of shaft tower.
3. an overhead transmission line lightning withstand level test macro, is characterized in that: have lightning protection mechanism and mechanism for testing; Lightning protection mechanism comprises shaft tower, insulator string, earth resistance and lightning conducter; Insulator string is placed in the both sides of shaft tower, its upper end link cross arm of tower, lower end carry wire; Ground resistance earth connects the bottommost of shaft tower; Lightning arrester installed by the shaft tower that lightning withstand level is lower; Mechanism for testing comprises power supply, lightning current, top impedance and terminating impedance; Power supply and top impedance are series at wire top, terminating impedance series conductor end ground connection, and lightning current connects in the bracket side at its lightning conducter place of shaft tower.
4. a kind of overhead transmission line lightning withstand level test macro as claimed in claim 3, is characterized in that: described shaft tower is many wave impedance.
5. a kind of overhead transmission line lightning withstand level test macro as claimed in claim 4, it is characterized in that: described many wave impedance, its lateral wave impedance is 160 Ω, and longitudinal wave impedance is 140 Ω.
6. a kind of overhead transmission line lightning withstand level test macro as claimed in claim 3, is characterized in that: the impulse corona circuit being connected with ground connection between described lightning conducter and wire.
7. a kind of overhead transmission line lightning withstand level test macro as claimed in claim 6, it is characterized in that: described impulse corona circuit, its limit phase conductor impulse corona electric capacity is 10.247pF/m, middle phase conductor impulse corona electric capacity is 10.135pF/m, and lightning conducter impulse corona electric capacity is 3.886pF/m.
8. a kind of overhead transmission line lightning withstand level test macro as claimed in claim 3, is characterized in that: described lightning arrester is connected in parallel on the two ends of its both sides insulator string of shaft tower.
CN201520833742.2U 2015-10-26 2015-10-26 Overhead transmission line lightning protection device and resistant thunder horizontal checkout system thereof CN205016965U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106199354A (en) * 2016-06-24 2016-12-07 国网浙江省电力公司金华供电公司 Insulator chain parallel connection gaps lightning impulse effectiveness and flash-over characteristic method of testing
CN109061335A (en) * 2018-06-28 2018-12-21 新疆金风科技股份有限公司 Lightning protection test macro and test method
CN110865268A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Method for testing lightning trip-out rate of transmission tower in low-soil resistivity region
CN110865265A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Method for testing counterattack trip-out rate of power transmission line in mountain area
CN110865267A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Evaluation method for shielding failure trip-out rate of 110kV power transmission line
CN110865269A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Power transmission line shielding failure trip rate evaluation method based on particle swarm optimization
CN110865266A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Lightning-resistant horizontal test method for power transmission line of cross-shaped grounding device
CN110865270A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 220kV power transmission line counterattack trip-out rate test method under lightning stroke
CN110865271A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Lightning trip-out rate test method considering line soil resistivity differentiation
CN110907773A (en) * 2019-12-03 2020-03-24 广东电网有限责任公司 Lightning-resistant level evaluation method for lightning-strike power transmission line in high-soil-resistivity area

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106199354A (en) * 2016-06-24 2016-12-07 国网浙江省电力公司金华供电公司 Insulator chain parallel connection gaps lightning impulse effectiveness and flash-over characteristic method of testing
CN106199354B (en) * 2016-06-24 2018-12-28 国网浙江省电力公司金华供电公司 Insulator chain parallel connection gaps lightning impulse validity and flash-over characteristic test method
CN109061335A (en) * 2018-06-28 2018-12-21 新疆金风科技股份有限公司 Lightning protection test macro and test method
CN110865268A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Method for testing lightning trip-out rate of transmission tower in low-soil resistivity region
CN110865265A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Method for testing counterattack trip-out rate of power transmission line in mountain area
CN110865267A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Evaluation method for shielding failure trip-out rate of 110kV power transmission line
CN110865269A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Power transmission line shielding failure trip rate evaluation method based on particle swarm optimization
CN110865266A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Lightning-resistant horizontal test method for power transmission line of cross-shaped grounding device
CN110865270A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 220kV power transmission line counterattack trip-out rate test method under lightning stroke
CN110865271A (en) * 2019-12-03 2020-03-06 广东电网有限责任公司 Lightning trip-out rate test method considering line soil resistivity differentiation
CN110907773A (en) * 2019-12-03 2020-03-24 广东电网有限责任公司 Lightning-resistant level evaluation method for lightning-strike power transmission line in high-soil-resistivity area

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Granted publication date: 20160203

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