CN101446594B - Polarity-changing tower for changing polarity of UHVDC test section lead - Google Patents
Polarity-changing tower for changing polarity of UHVDC test section lead Download PDFInfo
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- CN101446594B CN101446594B CN2008102247003A CN200810224700A CN101446594B CN 101446594 B CN101446594 B CN 101446594B CN 2008102247003 A CN2008102247003 A CN 2008102247003A CN 200810224700 A CN200810224700 A CN 200810224700A CN 101446594 B CN101446594 B CN 101446594B
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Abstract
The invention relates to a polarity-changing tower for changing the polarity of a UHVDC test section lead, comprising a high-voltage tower arranged between a high voltage bipolar DC electric power source and a main part of the test section lead, wherein, an upper layer crossarm, a middle layer crossarm and a lower layer crossarm are arranged in parallel on the high-voltage tower, the distance between the three crossarms meet the air gap clearance requirement between high-voltage leads, the upper layer crossarm is arranged at the top of the high-voltage tower, a plurality of pairs of small crossarms are arranged at the two sides of the upper layer crossarm in a parallel and extending way, a group of insulated substrings are respectively and vertically arranged at the endpoints of each small crossarm, a group of insulated substrings are respectively arranged at the two ends of the upper layer crossarm, a group of insulated substrings are respectively arranged at the two ends of the middle layer crossarm in the horizontal direction which is opposite to the electric power source, a group of insulated substrings are respectively and vertically arranged at the endpoints of the lower layer crossarm, two groups of insulated substrings are respectively arranged at the two sides of the lower layer crossarm in the horizontal direction, wire joinings are arranged at the end of each insulated substring. In the invention, the polarity changing of the UHVDC test section lead is simple, takes up small area and can meet the requirement of any polarity arrangement mode on air gap clearance.
Description
Technical field
The present invention relates to a kind of facility of extra-high voltage direct-current test line segment, particularly about a kind of change poles tower that is used to change extra-high voltage direct-current test wire section lead polarity.
Background technology
Extra-high voltage direct-current test line segment is a critical facility in the extra-high voltage direct-current test base, it be used for to China ± 500kV, ± 800kV, ± the various arrangements of conductors modes of electric pressure DC line such as 1000kV carry out the electromagnetic environment test, the spread pattern of extra-high voltage direct-current test line segment polarity specifically comprises horizontally the anodal negative pole that descends on (+-), the homeotropic alignment
, negative pole is anodal down on the homeotropic alignment
, common-tower double-return arrange to go up anodal negative pole down
, that common-tower double-return arrange to be gone up negative pole is anodal down
, common-tower double-return arranges the just ultra-Right negative pole in a left side
, common-tower double-return arranges the both positive and negative polarity skewed crossing
Seven kinds of forms.Because extra-high voltage direct-current test line segment has only a cover DC bipolar power supply, got rid of the possibility that realizes the opposed polarity arrangement mode by many cover power supplys.And, the long nearly 1km of the lead of test line segment, tens of tons that weigh all place tens of meters high-altitude, also can't adjust the position of lead in the process of restringing polarity.And also need reach the above clearance of 22m between the lead of the lead of band positive polarity and band negative polarity at interval, therefore by power supply and lead being carried out simply be connected directly that to change polarity also be infeasible.In addition, because the position of test line segment region is limited, also very difficult by the polar arrangement mode that the combination realization of a plurality of shaft towers is different.Therefore, how can change extra-high voltage direct-current test wire section lead polarity easily is that this area has a difficult problem to be solved.
Summary of the invention
At the problems referred to above, fundamental purpose of the present invention is to provide a kind of and provides for simple replacement of extra-high voltage direct-current test wire section lead polarity, and can guarantee requirement and the floor area little change poles tower of any polar arrangement mode to the clearance.
For achieving the above object, the present invention takes following technical scheme: a kind of change poles tower of changing extra-high voltage direct-current test wire section lead polarity, it is characterized in that: a high pressure pylon between high-voltage bipolar direct supply and test line segment main body, be arranged with upper strata cross-arm, middle level cross-arm and bottom cross-arm on the described high pressure pylon in parallel, the distance between each described cross-arm meets the clearance requirement between the high-voltage conducting wires; Described upper strata cross-arm is arranged on the top of described high pressure pylon, and its both sides extend in parallel and are provided with manyly to little cross-arm, hangs down respectively and is provided with one group of insulator chain in the end points place of each described little cross-arm, and the two ends of described upper strata cross-arm are respectively arranged with one group of insulator chain; Cross-arm two ends, described middle level are respectively arranged with one group of insulator chain in the horizontal direction of power supply dorsad; Hang down respectively and be provided with one group of insulator chain in each end points place of described lower floor cross-arm, the both sides along continuous straight runs is respectively arranged with two groups of insulator chains; The end of each described insulator chain is provided with wire joining.
The insulator chain of along continuous straight runs setting is a strain insulator string on described middle level cross-arm and the lower floor's cross-arm.
The insulator chain of establishing that hangs down on each described cross-arm is a suspension insulator.
Each described insulator chain is connected with each described cross-arm by the insulator hanging point.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is because by introducing the change poles tower between direct supply and test line segment main part, only utilize the unique cover direct supply of test line segment by increasing and reducing wire jumper, realize different polar arrangement modes; 2, the present invention is simple to operate, can realize changing polarity by the installation and removal wire jumper, and need not adjust the position of lead and need not adjust the insulator that has tension force can; 3, the little and easy construction of floor area of the present invention need not be untied insulator chain and just can satisfy the requirement of any polar arrangement mode to the clearance.
Description of drawings
Fig. 1 is the structural representation of change poles tower of the present invention
Fig. 2 is the schematic top plan view of change poles tower of the present invention
Fig. 3 is the perspective view of change poles tower of the present invention
Fig. 4 is the circuit connection diagram of one embodiment of the invention
Embodiment
In order to describe structure of the present invention, characteristics and effect in detail, existing following preferred embodiment of act and conjunction with figs. are described as follows.
As shown in Figure 1, the change poles tower has a high pressure pylon 10, between high-voltage bipolar direct supply and test line segment main body.Be arranged with upper strata cross-arm 20, middle level cross-arm 30 and bottom cross-arm 40 on the high pressure pylon 10 in parallel, the distance between each cross-arm must meet the clearance requirement between the high-voltage conducting wires.The length of upper strata cross-arm 20 is the longest, be arranged on the top of high pressure pylon 10, as shown in Figure 2, extension is provided with the little cross-arm 21,22,23,24 of four couple who is parallel to each other to upper strata cross-arm 20 to both sides, and the end points place of each little cross-arm 21,22,23,24 all is vertically installed with insulator chain 211,212,221,222,231,232,241,242 (as shown in Figure 3, Figure 4).The two-end-point place of upper strata cross-arm 20 also can be provided with the insulator chain (not shown) on demand.Cross-arm 30 two ends along continuous straight runs in middle level are respectively arranged with insulator chain 31,32, and middle level cross-arm 30 is used in its side tractive topping wire of power supply dorsad.Four end points places of lower floor's cross-arm 40 all are vertically installed with insulator chain 41,42,43,44, and the both sides along continuous straight runs is respectively arranged with insulator chain 45,46,47,48, but make all tractive leads of lower floor's cross-arm 40 both sides.
Above-mentioned each insulator chain is arranged on each cross-arm by the insulator chain hanging point, wherein the insulator chain that is provided with of along continuous straight runs adopts strain insulator string, as is arranged on the insulator chain 31,32 on the middle level cross-arm 30 and the insulator chain 45,46,47,48 that is arranged on lower floor's cross-arm 40 is strain insulator string; Vertically disposed insulator chain adopts suspension insulator, as be arranged on the insulator chain 211,212,221,222,231,232,241,242 on the upper strata cross-arm 20 and the insulator chain 41,42,43,44 that is arranged on lower floor's cross-arm 40 is suspension insulator, end at each insulator chain is provided with wire joining, flexibly connects into different conducting circuits as the pipe bus 50 of wire jumper by these wire joinings.Thus, the power lead 11 of high pressure pylon 10 1 sides can make the lead 12 that tried at high pressure pylon 10 opposite sides form different lead polar arrangement modes after making up by various connection.Promptly the conducting circuit of being formed by change flexible connection spool bus 50 is changed the polarity of the lead of high pressure pylon 10 opposite sides.
As shown in Figure 4, the tie point that defines each strain insulator string and power lead 11 and tried lead 12 is N
1～N
6, suspension insulator is X with the tie point of pipe bus 50
1～X
10N
1The conductor strip positive polarity that is connected with power supply, N
2The conductor strip negative polarity that is connected with power supply.Change poles tower of the present invention connects arrangement by the difference of the terminal wire joining of insulator chain, can obtain the wire jumper connectivity scenario under the following various lead polar arrangement mode, connects with "-" symbolic representation.NM each point is in off-state.
Horizontally: N
1-X
9-N
3, N
2-X
10-N
4
Negative just down on the homeotropic alignment
: N
1-X
1-X
5-X
6-X
7-X
8-N
6, N
2-X
10-N
4
Just bearing down on the homeotropic alignment
: N
1-X
9-N
3, N
2-X
5-X
1-X
2-X
3-X
4-N
5
Negative just down on the common-tower double-return
: N
1-X
1-X
2-X
3-X
4-N
5-N
6, N
2-X
10-N
4-N
3
Just bearing down on the common-tower double-return
: N
1-X
9-N
3-N
4, N
2-X
5-X
6-X
7-X
8-N
6-N
5
A common-tower double-return left side is positive right negative
: N
1-X
9-N
3-N
5, N
2-X
10-N
4-N
6
The positive and negative intersection of common-tower double-return
: N
1-X
9-N
3-N
6, N
4-X
10-N
2-X
5-X
1-X
2-X
3-X
4-N
5
The quantity of the little cross-arm that is provided with on the upper strata of the present invention cross-arm 20 also can change as required, and 5 pairs of little cross-arms for example are set.From the above, the present invention is at the restringing polarity chron, and all insulator chains and the lead location that is connected are fixed, and only can realize changing the lead polarity of test line segment main part by increasing and reduce wire jumper, and easy construction.
The above; it only is a kind of concrete example of the present invention; all those skilled in the art all can carry out equivalent structure transformation according to instructions of the present invention, claims and accompanying drawing, and such modification and conversion all should be included within the scope of patent protection of the present invention.
Claims (4)
1. change poles tower of changing extra-high voltage direct-current test wire section lead polarity, it is characterized in that: a high pressure pylon between high-voltage bipolar direct supply and test line segment main body, be arranged with upper strata cross-arm, middle level cross-arm and bottom cross-arm on the described high pressure pylon in parallel, the distance between each described cross-arm meets the clearance requirement between the high-voltage conducting wires; Described upper strata cross-arm is arranged on the top of described high pressure pylon, and its both sides extend in parallel and are provided with at least four pairs of little cross-arms, hangs down respectively and be provided with one group of insulator chain in the end points place of each described little cross-arm, and the two ends of described upper strata cross-arm are respectively arranged with one group of insulator chain; Cross-arm two ends, described middle level are respectively arranged with one group of insulator chain in the horizontal direction of power supply dorsad; Hang down respectively and be provided with one group of insulator chain in each end points place of described lower floor cross-arm, the both sides along continuous straight runs is respectively arranged with two groups of insulator chains; The end of each described insulator chain is provided with wire joining.
2. a kind of according to claim 1 change poles tower of changing extra-high voltage direct-current test wire section lead polarity is characterized in that: the insulator chain of along continuous straight runs setting is a strain insulator string on described middle level cross-arm and the lower floor's cross-arm.
3. a kind of according to claim 1 change poles tower of changing extra-high voltage direct-current test wire section lead polarity is characterized in that: the insulator chain of establishing that hangs down on each described cross-arm is a suspension insulator.
4. a kind of according to claim 1 change poles tower of changing extra-high voltage direct-current test wire section lead polarity is characterized in that: each described insulator chain is connected with each described cross-arm by the insulator hanging point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102247003A CN101446594B (en) | 2008-10-24 | 2008-10-24 | Polarity-changing tower for changing polarity of UHVDC test section lead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102247003A CN101446594B (en) | 2008-10-24 | 2008-10-24 | Polarity-changing tower for changing polarity of UHVDC test section lead |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101446594A CN101446594A (en) | 2009-06-03 |
| CN101446594B true CN101446594B (en) | 2011-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102247003A Active CN101446594B (en) | 2008-10-24 | 2008-10-24 | Polarity-changing tower for changing polarity of UHVDC test section lead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101446594B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552433B (en) * | 2021-07-21 | 2022-08-09 | 国网河南省电力公司直流运检分公司 | Method for measuring CT polarity of extra-high voltage transformer bushing |
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2008
- 2008-10-24 CN CN2008102247003A patent/CN101446594B/en active Active
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| Publication number | Publication date |
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| CN101446594A (en) | 2009-06-03 |
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