CN208986598U - It is a kind of mutually to use earthing pole wiring construction - Google Patents
It is a kind of mutually to use earthing pole wiring construction Download PDFInfo
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- CN208986598U CN208986598U CN201821920922.4U CN201821920922U CN208986598U CN 208986598 U CN208986598 U CN 208986598U CN 201821920922 U CN201821920922 U CN 201821920922U CN 208986598 U CN208986598 U CN 208986598U
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- isolation switch
- switch
- direct current
- earthing pole
- pole
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- 238000010276 construction Methods 0.000 title claims abstract description 13
- 238000002955 isolation Methods 0.000 claims abstract description 59
- 239000004020 conductor Substances 0.000 description 7
- 230000007935 neutral effect Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000010363 phase shift Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Emergency Protection Circuit Devices (AREA)
Abstract
Earthing pole wiring construction is mutually used the utility model relates to a kind of, it includes the first isolation switch, it returns on two DC lines and is connected with back two DC earthing polar circuits, first isolation switch one end is in parallel with two direct current grounding pole circuit on one side are returned, and the first isolation switch other end is connected through the second isolation switch with third isolation switch one end；The third isolation switch other end is in parallel with time direct current grounding pole circuit on one side being connected to back on a DC line；It is in series with EBS switch between the first isolation switch and the second isolation switch, the 2nd IDE_OBP is provided between EBS and the second isolation switch；The first IDE_OBP is provided between third isolation switch and a time DC line.The utility model ensure that protection without dead zone, it is ensured that safe and reliable operation when double back direct current mutually uses earthing pole；And ensure that the normal operation of non-faulting direct current as far as possible, improve the reliability of DC operation.
Description
Technical field
The utility model relates to a kind of extra-high voltage direct-current engineering fields, especially with regard to a kind of the mutual with ground connection of double back direct current
Pole wiring construction.
Background technique
Earthing pole is an important component in D.C. high voltage transmission, provides zero potential for DC loop and clamps down on a little,
And in monopolar ground return operation, circuit is constituted by earthing pole and the earth.Prior art extra-high voltage direct-current engineering is using whole
Flow station, DC line, ground electrode circuit and Inverter Station composition.Once earthing pole is unavailable (break down or overhaul), then directly
Flow forced outage.In order to reduce engineering outage rate, increase economic efficiency, two DC engineerings neighbouring for site can be used mutually
Earthing pole, when the earthing pole of one of DC engineering is unavailable, the earthing pole for borrowing another engineering constitutes transmitting loop, just
Normal transmission power.In order to achieve the above object, as shown in Figure 1, two DC engineerings that site is closed on can be set mutually with ground connection
The equipment such as pole link circuit and relevant change-over switch, disconnecting link, are grounded the mutual use of pole, improve DC operation reliability and
Economic benefit.
When twice direct currents mutually use earthing pole, due to changing bipolar and ground connection polar region connection type, the guarantor in the region
Shield configuration and action policy also need to adjust.Important protection of the bipolar neutral conductor differential protection as bi-pole area, for detecting therefrom
Sexupara line needs to adjust its protection act when twice direct currents mutually use earthing pole to the ground fault between ground connection polar curve lead
Strategy, to adapt to new connection type.
Summary of the invention
Earthing pole wiring construction is mutually used in view of the above problems, the object of the present invention is to provide a kind of, can guarantee guarantor
Shield is without dead zone, it is ensured that safe and reliable operation when double back direct current mutually uses earthing pole.
To achieve the above object, the utility model takes following technical scheme: it is a kind of mutually with earthing pole wiring construction, it sets
Set return a direct current and return two direct currents between earthing pole connecting line on, it is characterised in that including the first isolation switch, second every
From disconnecting link, third isolation switch, EBS, the first IDE_OBP and the 2nd IDE_OBP；Wherein, EBS is earthing pole line connection switch,
IDE_OBP is mutually to measure CT with grounding electrode electric current；Two DC earthing polar circuits are connected with back on described time two DC lines, it is described
First isolation switch one end is in parallel with described time two direct current grounding pole circuit on one side, described in the first isolation switch other end warp
Second isolation switch is connected with third isolation switch one end；It the third isolation switch other end and is connected to and described returns one
A direct current grounding pole circuit on one side parallel connection is returned on DC line；Positioned at first isolation switch and second isolation switch
Between be in series with the EBS, the 2nd IDE_OBP is provided between the EBS and second isolation switch；It is located at
The first IDE_OBP is provided between the third isolation switch and a described time DC line.
It is further, in parallel between second isolation switch and the third isolation switch that there are two ground branch；It is described
It is provided with grounding switch in two ground branch, described grounding switch one end is connected to second isolation switch and described the
On earthing pole connecting line between three isolation switch, the grounding switch other end ground connection.
Further, a described time direct current grounding pole circuit connects by ground electrode circuit with two DC earthing polar circuits are returned
Ground.
Because the utility model adopts the above technical scheme, it has the following advantages: 1, the utility model is mutual with ground connection
The earthing pole that twice direct currents may be implemented in pole wiring construction is mutually used, and when earthing pole is unavailable, borrows the ground connection of another time direct current
Pole normal transmission improves the economic benefit of direct current transportation.2, the bipolar neutral conductor differential protection range of the utility model covers
Double back earthing pole connecting line region ensure that protection without dead zone, it is ensured that double back direct current so that related protection zone overlaps each other
Safe and reliable operation when mutually using earthing pole.3, the Preservation tactics flexibility and reliability of the utility model, it is same with isolated fault removing
When, it ensure that non-faulting returns the normal operation of direct current system as far as possible, improve the reliability of DC operation.
Detailed description of the invention
Fig. 1 is twice DC engineering main electrical scheme schematic diagrames for mutually using earthing pole；
Fig. 2 is that the utility model double back direct current mutually uses earthing pole wiring schematic diagram；
Fig. 3 is bipolar neutral conductor differential protection motion flow schematic diagram when the utility model mutually uses earthing pole.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and examples.
As shown in Fig. 2, the utility model provides a kind of mutually with earthing pole wiring construction, setting is returning a direct current and is returning two
On earthing pole connecting line between direct current comprising the first isolation switch Q31, the second isolation switch Q32, third isolation switch
Q33, earthing pole line connection switch (EBS), the first IDE_OBP (return the mutual of a direct current and measure CT with grounding electrode electric current) and second
IDE_OBP (returns the mutual of two direct currents and measures CT with grounding electrode electric current).
It returns on two DC lines and is connected with back two DC earthing polar circuits, first one end isolation switch Q31 and time two direct currents
Earthing pole circuit on one side is in parallel, and the first isolation switch Q31 other end is through the second isolation switch Q32 and third isolation switch Q33 mono-
End series connection.33 other end of third isolation switch and time direct current grounding pole circuit on one side being connected to back on a DC line are simultaneously
Connection.EBS switch is in series between the first isolation switch Q31 and the second isolation switch Q32；Positioned at EBS and the second isolation knife
The 2nd IDE_OBP is provided between lock Q32；The first IDE_ is provided between third isolation switch 33 and a time DC line
OBP。
In above-described embodiment, in parallel between the second isolation switch Q32 and third isolation switch Q33 there are two ground connection branch
Road.Grounding switch is provided in two ground branch, grounding switch one end is connected to the second isolation switch Q32 and is isolated with third
On earthing pole connecting line between disconnecting link Q33, grounding switch other end ground connection.
In the various embodiments described above, a time direct current grounding pole circuit is identical as two DC earthing polar circuits are returned, by ground connection
Pole line-to-ground.
To sum up, the utility model it is mutual with earthing pole wiring construction in use, when the first isolation on earthing pole connecting line
Disconnecting link Q31, the second isolation switch Q32, third isolation switch Q33, EBS switch are closed state, and grounding switch is in an open state,
The extremely connection status of ground connection mutually, fault ground extremely isolation when, then it is assumed that double back direct current be mutually use earthing pole state.
As shown in figure 3, being based on above-mentioned wiring construction, the utility model also provides bipolar neutrality when one kind mutually uses earthing pole
Line differential protection method of operating, comprising the following steps:
1) when EBS switch is in coincidence, twice direct currents are mutually to use earthing pole state；When EBS switch is in quartile, two
Returning direct current is earthing pole independent operating state；
2) when twice direct currents mutually use earthing pole, IDE_OBP is included in the bipolar neutral conductor differential protection of twice direct currents
In criterion；
3) when mutually using earthing pole, if certain returns the movement of DC bipolar neutral conductor differential protection, it is dynamic that this time direct current executes protection
As while give it and mutually use another time direct current sending action signal of earthing pole, and judge whether it is bipolar operation；
If 4) protection still act, the not available direct current of locking grounding electrode, judge the available direct current of earthing pole whether be
Bipolar operation, and pull open EBS；
5) if protection still acts, the available direct current of locking grounding electrode；
6) when twice direct currents restore earthing pole independent operating, the criterion of bipolar neutral conductor differential protection no longer adopts IDE_
OBP, action policy revert to strategy when independent operating.
Above-mentioned steps 3) in, judge whether it is it is bipolar operation the following steps are included:
If 3.1) it is bipolar operation that the bipolar neutral conductor differential protection, which acts back, pole balance is executed；If monopolar operation,
Phase shift is then executed to restart；
If 3.2) mutually using another time direct current of earthing pole with it is bipolar operation, pole balance life is sent to another time direct current
It enables；If being mutually monopolar operation with another time direct current of earthing pole with it, phase shift reset command is sent.
Above-mentioned steps 4) in, judge the available direct current of earthing pole whether be it is bipolar operation the following steps are included:
4.1) if the available direct current of earthing pole is that bipolar operation is directly pulled open after the not available direct current locking of earthing pole
EBS；And judge whether protection still acts herein, it is that then the available direct current of locking grounding electrode, on the contrary then earthing pole are available straight
Stream operates normally；
4.2) if the available direct current of earthing pole is monopolar operation, after the not available direct current locking of earthing pole, earthing pole can
Direct current executes phase shift order, and the electric current of EBS to be passed through pulls open EBS after being less than preset definite value again.
The various embodiments described above are merely to illustrate the utility model, and structure, setting position and the step of each component are all can be with
Be varied, on the basis of technical solutions of the utility model, it is all according to the utility model principle to individual part and step
The improvement and equivalents of progress, should not exclude except the protection scope of the utility model.
Claims (3)
1. a kind of mutually uses earthing pole wiring construction, a direct current is set back and is returned on the earthing pole connecting line between two direct currents,
It is characterized by comprising the first isolation switch, the second isolation switch, third isolation switch, EBS, the first IDE_OBP and second
IDE_OBP；Wherein, EBS is earthing pole line connection switch, and IDE_OBP is mutually to measure CT with grounding electrode electric current；
Be connected with back two DC earthing polar circuits on described time two DC lines, first isolation switch one end with described time two
Direct current grounding pole circuit on one side is in parallel, and the first isolation switch other end is isolated through second isolation switch with the third
The series connection of disconnecting link one end；The third isolation switch other end returns a direct current grounding pole with described return on a DC line is connected to
Circuit on one side is in parallel；It is in series with the EBS between first isolation switch and second isolation switch, is located at described
The 2nd IDE_OBP is provided between EBS and second isolation switch；Positioned at the third isolation switch and described time one
The first IDE_OBP is provided between DC line.
2. wiring construction as described in claim 1, it is characterised in that: second isolation switch and the third isolation switch it
Between in parallel there are two ground branch；Grounding switch, grounding switch one end connection are provided in described two ground branch
To the earthing pole connecting line between second isolation switch and the third isolation switch, another termination of grounding switch
Ground.
3. wiring construction as claimed in claim 1 or 2, it is characterised in that: a described time direct current grounding pole circuit and time two direct currents
Ground connection polar circuit passes through ground electrode circuit ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821920922.4U CN208986598U (en) | 2018-11-21 | 2018-11-21 | It is a kind of mutually to use earthing pole wiring construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821920922.4U CN208986598U (en) | 2018-11-21 | 2018-11-21 | It is a kind of mutually to use earthing pole wiring construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208986598U true CN208986598U (en) | 2019-06-14 |
Family
ID=66791308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821920922.4U Active CN208986598U (en) | 2018-11-21 | 2018-11-21 | It is a kind of mutually to use earthing pole wiring construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208986598U (en) |
-
2018
- 2018-11-21 CN CN201821920922.4U patent/CN208986598U/en active Active
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