CN208506131U - A kind of converter station earth mat shunting test device of lightning conducter direct lightning strike protection - Google Patents
A kind of converter station earth mat shunting test device of lightning conducter direct lightning strike protection Download PDFInfo
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- CN208506131U CN208506131U CN201820670373.3U CN201820670373U CN208506131U CN 208506131 U CN208506131 U CN 208506131U CN 201820670373 U CN201820670373 U CN 201820670373U CN 208506131 U CN208506131 U CN 208506131U
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- lightning conducter
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- wire jumper
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Abstract
A kind of converter station earth mat shunting test device of lightning conducter direct lightning strike protection, including wire jumper, split core type current transformer, testing current line, frequency-selecting ammeter；The wire jumper generates the connection outlet of current signal for aerial earth wire and interior lightning conducter of standing, the split core type current transformer flows through wire jumper current signal for accurately measuring, one end of the testing current line is connected to split core type current transformer, and the other end is connected to frequency-selecting ammeter.Advantage is, it is able to achieve the precise measurement for flowing through the current signal of aerial earth wire, lightning conducter shunting in valve hall is can solve and is difficult to test problem, avoid manually climbing the security risks such as person falling from high altitude, electric shock existing for framework, greatly reduce testing time simultaneously, and then improves working efficiency.
Description
Technical field
The utility model relates to earth mats to shunt testing field, especially a kind of to use lightning conducter as direct lightning strike safeguard procedures
Converter station earth mat shunt test device.
Background technique
The lightning protection of converter station guides thunder and lightning to pass through above protected object using lightning rod and lightning conducter, and safe
The earth is leaked into, prevents thunder and lightning from attacking directly, reduces electrical equipment in its protection scope and building by the probability of direct lightning strike, with
The not essential difference of the lightning protection of regular alternating current substation.Due to the AC-DC switch field of converter station, alternating current filter field,
The purposes such as DC neutral field of points and voltage class difference, therefore lightning protection also has the characteristics of different from AC Substation.The change of current
Alternating current filter region in standing is since shielding requirements are higher, according to lightning conductor protection, the height for the lightning rod to be improved that is bound to
And density, cause the promotion of difficult arrangement and foundation cost.Earth-wire protection can be to avoid the disadvantage in lightning conductor protection.Therefore mesh
The direct lightning strike protection of preceding converter station generally uses lightning conducter.
With the increase of the converter station operation time limit, converter station earth mat constantly generates corrosion under soil, stray electrical current effect,
So as to cause the increase of mesh grounding impedance.Q/CSG114002-2011 " power equipment preventive trial regulation " defines earth mat
Shunting of the lightning conducter of measurement outlet structure to test electric current is needed during earth loop impedance test, obtains diverting coefficient, in conjunction with connecing
Impedance measured value in ground calculates the true impedance ground value of earth mat.
When carrying out earth mat shunting test as the converter station of direct lightning strike safeguard procedures using lightning conducter, there are following two sides
The problem of face:
1, there are more backcrossing outflow lines and twice direct-current polars, ground electrode circuit outlet in converter station, and respectively return back out line all
It is whole erection aerial earth wire, aerial earth wire is connected by wire jumper with lightning conducter in Converter Station.And lightning conducter is typically mounted at
The top of the buildings such as converter station framework, valve hall.Traditional shunting test mode is using flexible current split-core type meter in converter station structure
Bridge joint ground terminal carries out.Since converter station framework ground terminal size is very big, common current clamp table size is too small, is not able to satisfy test
It is required that therefore Rogowski coil can only be used, but its precision is lower, and framework is large number of in converter station, carries out shunt test one by one
A large amount of manpower and material resources need to be expended；The ground terminal of valve hall building generally passes through cement and directly enters ground, and flexible current split-core type meter is not easy
Vise ground terminal, it is difficult to realize and shunt test.
2, can by manually climbing outlet structure, using flexible current split-core type meter respectively return back out line with stand in lightning conducter connect jump
Tapping condition is tested on line, but there are the personal security risk such as falling from high altitude, electric shock in test process, is not easy in the method reality
Operation.
As it can be seen that existing converter station earth mat shunting test method, which exists, is difficult to precise measurement earth mat diverting coefficient, person peace
The defects of hidden danger is larger entirely, therefore it is necessary to shunt test device to lightning conducter direct lightning strike protection converter station earth mat to improve.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts proposes a kind of protection of lightning conducter direct lightning strike and changes
Stream station earth mat shunts test device, to realize converter station earth mat shunting precise measurement and raising working efficiency, reduce person peace
Full blast danger.
The utility model is achieved through the following technical solutions:
A kind of converter station earth mat of lightning conducter direct lightning strike protection shunts test device, including wire jumper, split core type current transformer,
Testing current line, frequency-selecting ammeter；The wire jumper goes out for aerial earth wire and the connection that interior lightning conducter generates current signal of standing
Line, the split core type current transformer flow through wire jumper current signal for accurately measuring, and one end of the testing current line connects
It connects in split core type current transformer, the other end is connected to frequency-selecting ammeter.
As an improvement of the above scheme, the testing current line includes shielded signal line, sample connection, wherein sampling connects
Mouth is matched with frequency-selecting ammeter measurement port, is acquired to current signal.
The utility model has the following beneficial effects: being able to achieve the precise measurement for flowing through the current signal of aerial earth wire, energy
It solves lightning conducter shunting in valve hall to be difficult to test problem, avoids manually climbing the peace of person falling from high altitude, electric shock etc. existing for framework
Full blast danger, while greatly reducing testing time, and then improve working efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the test device of the utility model.
Description of symbols: wire jumper 1, current transformer 2, testing current line 3, shielded signal line 31, sample connection 32, choosing
Frequency ammeter 4.
Specific embodiment
Embodiment
As shown in Figure 1, a kind of lightning conducter direct lightning strike protection converter station earth mat shunts test device, including for generating electric current
The wire jumper 1 of the connection outlet aerial earth wire of signal and interior lightning conducter of standing, for accurately measuring the pincer for flowing through wire jumper current signal
Current transformer 2, one end of the testing current line 3 are connected to split core type current transformer 2, and the other end is connected to frequency-selecting ammeter
4.Testing current line 3 includes shielded signal line 31, sample connection 32, wherein sample connection 32 and frequency-selecting ammeter measurement port
Match, current signal is acquired.
The utility model test method is as follows:
When carrying out mesh grounding testing impedance, earth mat is connected with framework, and framework is connected with lightning conducter, outlet aerial earth wire
It is connected by wire jumper with interior lightning conducter of standing, when earth loop impedance test instrument injects certain frequency (45-55Hz) electric current to earth mat, electricity
Earth mat conductor, framework, lightning conducter, wire jumper 1, aerial earth wire outflow are flowed through, the split core type current transformer being mounted on wire jumper 1 is utilized
2 are converted to the primary current signal for flowing through wire jumper 1 the secondary current signal of higher magnitude, and secondary current signal is through shielded signal
Line 31 transmits, and LIYCY-TP multiple twin shielding data cable can be used in shielded signal line 31, and the design of testing current line is used for
The sample connection 32 of measurement, 4 measurement port of frequency-selecting ammeter match with testing current line sample connection 32, and sample connection 32 connects
It is connected to frequency-selecting ammeter 4, frequency-selecting ammeter 4 shows current signal amplitude and phase collected.
Above-listed detailed description is illustrating for the utility model possible embodiments, and the embodiment is not to limit
The scope of the patents of the utility model, all equivalence enforcements or change without departing from carried out by the utility model, is intended to be limited solely by this case
In the scope of the patents.
Claims (2)
1. a kind of converter station earth mat of lightning conducter direct lightning strike protection shunts test device, which is characterized in that including wire jumper, pincerlike electricity
Current transformer, testing current line, frequency-selecting ammeter；The wire jumper generates current signal for aerial earth wire and interior lightning conducter of standing
Connection outlet, the split core type current transformer for accurately measure flows through wire jumper current signal, the testing current line
One end be connected to split core type current transformer, the other end is connected to frequency-selecting ammeter.
2. a kind of converter station earth mat of lightning conducter direct lightning strike protection according to claim 1 shunts test device, feature
It is, the testing current line includes shielded signal line, sample connection, wherein sample connection and frequency-selecting ammeter measurement port
Matching, is acquired current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820670373.3U CN208506131U (en) | 2018-05-07 | 2018-05-07 | A kind of converter station earth mat shunting test device of lightning conducter direct lightning strike protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820670373.3U CN208506131U (en) | 2018-05-07 | 2018-05-07 | A kind of converter station earth mat shunting test device of lightning conducter direct lightning strike protection |
Publications (1)
| Publication Number | Publication Date |
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| CN208506131U true CN208506131U (en) | 2019-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820670373.3U Active CN208506131U (en) | 2018-05-07 | 2018-05-07 | A kind of converter station earth mat shunting test device of lightning conducter direct lightning strike protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236505A (en) * | 2021-05-07 | 2021-08-10 | 北京壬工智能科技有限公司 | Fan thunder and lightning on-line monitoring system |
-
2018
- 2018-05-07 CN CN201820670373.3U patent/CN208506131U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236505A (en) * | 2021-05-07 | 2021-08-10 | 北京壬工智能科技有限公司 | Fan thunder and lightning on-line monitoring system |
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