CN203813220U - 10 kV switching station - Google Patents
10 kV switching station Download PDFInfo
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- CN203813220U CN203813220U CN201420147486.7U CN201420147486U CN203813220U CN 203813220 U CN203813220 U CN 203813220U CN 201420147486 U CN201420147486 U CN 201420147486U CN 203813220 U CN203813220 U CN 203813220U
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- transformer
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- 230000005611 electricity Effects 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 2
- 238000011161 development Methods 0.000 description 6
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Abstract
A 10 kV switching station comprises a first-section bus and a second-section bus which are connected in series through a section switch cabinet, each section bus is connected with an inlet loop and five outlet loops, and the outlet loops are connected with a station transformer. The inlet loop of the 10 kV switching station is provided with fiber longitudinal differential protection, the function that the switching station serves as the extension of the 10 kV bus of a transformer station is fully achieved, and the 10 kV switching station provides sufficient power supplies to cable ring network additionally installed in a core area.
Description
Technical field
The utility model relates to a kind of 10 kV switchyards.
Background technology
Shanghai City is the first city of China, and one of four municipality directly under the central government are China's economy, finance, trade and shipping centre.2012, Shanghai City GDP reached 2.01 trillion RMB, 11 of whole world ranks.GDP per capita and per capita disposable income all occupy each provinces and regions, the whole nation and municipality directly under the Central Government is the first.Shanghai is in the development key period of " industrial transformation " at present, puts forth effort to make that " four " center "-international economy centers, international financial center, International Trade Center, International shipping center, Zhe Jiudui whole city power supply capacity level is had higher requirement.
1210.41 square kilometres of Pudong New Area, Shanghai whole district areas, from nineteen ninety, for the Party Central Committee, State Council, determine to have gone through development in more than 20 years since " Pudong's great development " key areas such as built Golden Bridge, the national development zone of Zhangjiang, Waigaoqiao Bonded Zone, Lujiazui Financial and Trade Zone.On July 3rd, 2013, " China (Shanghai) free trade trial zone " is granted, settles coastal 28 square kilometres of Pudong New District, indicates the ground zero of Shanghai Metallurgical Industry.As maximum, most active district, the whole city, Pudong New District leads the whole city in all many-sides such as comprising economic development, industrial transformation.
The construction scope of Pudong's core space power distribution network is the riverine core space of Pudong's Huangpu River, and to Huangpu River, north, to Huangpu River, to the east of Pudong South Road, reaches credit Hua Lu in the south, takes up an area approximately 10 square kilometres.Naturally extending of the rapid growth of this core area power load and distribution line, has unavoidably caused the problems such as blur boundary, crossing elimination, roundabout power supply, affects power supply reliability and line loss lean.
Carrying out on the basis of power distribution network operation level and evaluation of power supply capability comprehensively, the problem existing by analyzing current power distribution network, reach a conclusion: 10kV power distribution network is the absolute factor that affects Pudong's mains supply reliability, and scheduled outage is the principal element that affects Pudong's power supply reliability.Improve power supply reliability, strengthening 10kV medium voltage distribution network, reducing scheduled outage influence degree is fundamental way, this requires power distribution network to possess the transfer ability of loading flexibly.The planning and development of making a general survey of international advanced Regional City electrical network, can obtain similar conclusion, and solid distribution network shelf structure, the transfer ability of loading is the basis of modernization power distribution network flexibly.
Switchyard is as 10kV main power supply in power distribution network rack, and switchyard is a type of indoor power distribution station, and the inlet wire of switchyard does not configure protective relaying device, goes out tape relaying protection, adopts circuit breaker, and can configure as required distribution transformer.The inlet wire of the switchyard using does not at present configure optical-fiber longitudinal difference protection, poor reliability.
Utility model content
The utility model provides a kind of 10 kV switchyards, and inlet wire configuration optical-fiber longitudinal difference protection, gives full play to the function that switchyard extends as the 10kV of transformer station bus, sets up cable ring-system sufficient power supply is provided for core space.
In order to achieve the above object, the utility model provides a kind of 10 kV switchyards, this switchyard comprises first paragraph bus and the second segment bus of connecting by block switch cabinet, and every section of bus connects respectively one and returns back out line back into line and five, and described outlet is change for docking station also.
Described inlet wire connects transformer station, the current transformer that this inlet wire comprises series connection and circuit breaker, and current transformer detects the magnitude of current of inlet wire; for optical-fiber longitudinal difference protection gathers the magnitude of current; if the magnitude of current numerical value gathering is greater than setting value, protection action, cut-off breaker.
Described inlet wire also comprises potential indicator and earthing switch blade, after this potential indicator and earthing switch blade parallel connection, and the current transformer that series connection is described, when inlet wire has electricity, potential indicator shows red, grounding switch ground connection when line maintenance.
The circuit breaker summation current transformer that described outlet comprises series connection, current transformer detects the magnitude of current of outlet, for optical-fiber longitudinal difference protection gathers the magnitude of current, if the magnitude of current numerical value gathering is greater than setting value, protection action, cut-off breaker.
Described outlet also comprises potential indicator and earthing switch blade, after this potential indicator and earthing switch blade parallel connection, and the current transformer that series connection is described, when outlet has electricity, potential indicator shows red, grounding switch ground connection when line maintenance.
The circuit breaker summation current transformer that described block switch cabinet comprises series connection; block switch cabinet plays prepared auto restart effect; during normal operation, circuit breaker disconnects; when prepared auto restart protection is enabled; if wherein a road inlet wire dead electricity causes one section of bus dead electricity; after open failure service entrance switch, circuit breaker closes, and is the bussed supply of dead electricity.
Plug-in strip, the fuse that described station comprises series connection with change, the use of standing become transformer and earthing switch blade, ground connection when described plug-in strip overhauls with change at station, disconnects at ordinary times, and fuse prevents change overcurrent for station, stand and provide outlet power supply with change transformer, ground connection when earthing switch blade overhauls with change at station.
In described switchyard; every section of bus also connects a lightning arrester and voltage transformer storehouse; described lightning arrester and voltage transformer storehouse comprise threephase potential transformer; and the lightning arrester in parallel with this threephase potential transformer; threephase potential transformer gathers busbar voltage for relaying protection, and lightning arrester plays bus lightning protection function.
The utility model inlet wire configuration optical-fiber longitudinal difference protection, gives full play to the function that switchyard extends as the 10kV of transformer station bus, sets up cable ring-system sufficient power supply is provided for core space.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Following according to Fig. 1, illustrate preferred embodiment of the present utility model.
As shown in Figure 1, the utility model provides a kind of 10 kV switchyards, this switchyard comprises by first paragraph bus 201 and the second segment bus 202 of 5 series connection of block switch cabinet, and every section of bus connects respectively one and returns back out line 4 back into line 1 and five, and described outlet 4 is gone back docking station with becoming 6.
Described inlet wire 1 connects transformer station, the current transformer 101 that this inlet wire 1 comprises series connection and circuit breaker 102, and current transformer 101 detects the magnitude of current of inlet wire; for optical-fiber longitudinal difference protection gathers the magnitude of current; if the magnitude of current numerical value gathering is greater than setting value, protection action, cut-off breaker 102.
This inlet wire 1 also comprises potential indicator 103 and earthing switch blade 104, after this potential indicator 103 and earthing switch blade 104 parallel connections, the current transformer 101 that series connection is described, when inlet wire has electricity, potential indicator 103 shows red, grounding switch 104 ground connection when line maintenance.
Circuit breaker 401 summation current transformers 402 that described outlet 4 comprises series connection, current transformer 402 detects the magnitude of current of outlet, for optical-fiber longitudinal difference protection gathers the magnitude of current, if the magnitude of current numerical value gathering is greater than setting value, protection action, cut-off breaker 401.
This outlet 4 also comprises potential indicator 403 and earthing switch blade 404, after this potential indicator 403 and earthing switch blade 404 parallel connections, the current transformer 402 that series connection is described, when outlet has electricity, potential indicator 403 shows red, grounding switch 404 ground connection when line maintenance.
Circuit breaker 501 summation current transformers 502 that described block switch cabinet 5 comprises series connection; block switch cabinet mainly plays prepared auto restart effect; during normal operation, circuit breaker 501 disconnects; when prepared auto restart protection is enabled; if wherein a road inlet wire dead electricity causes one section of bus dead electricity; after open failure service entrance switch, circuit breaker 501 closes, and is the bussed supply of dead electricity.
Described station is with becoming 6 plug-in strips that comprise series connection 601, fuse 602, standing with becoming transformer 603 and earthing switch blade 604, ground connection when described plug-in strip 601 overhauls with change 6 at station, disconnect at ordinary times, fuse 602 prevents that station is with becoming overcurrent, stand and provide outlet power supply with becoming transformer 603, ground connection when earthing switch blade 604 overhauls with change at station.
In described switchyard, every section of bus also connects a lightning arrester and voltage transformer storehouse 3, and described lightning arrester and voltage transformer storehouse 3 comprise threephase potential transformer 301, and the lightning arrester 302 in parallel with this threephase potential transformer 301.Threephase potential transformer 301 gathers busbar voltage for relaying protection, 302 bus lightning protection functions of lightning arrester.
The line scale of described switchyard is chosen to be two and enters ten and go out; every section of inlet wire all has optical-fiber longitudinal difference protection: the inlet wire side outgoing line side corresponding to higher level's website at switchyard detects current phase and size; higher level's outlet magnitude of current is transmitted through the fiber to the inlet wire of this switchyard; if higher level goes out line current and our station inlet wire current inconsistent (being greater than protection definite value); think line failure, protection action disconnects our station service entrance switch outlet switch corresponding to higher level.Switchyard adopts sectionalized single busbar connection, and every time cross-section of cable of inlet wire and interconnection is selected 3 * 400mm
2, outlet cable can be selected according to load condition; Switchyard is sent electric power incoming line here 2 times by different substation, and the high capacity rate in every loop line road is 50%; The capacity of the transformer in switchyard in distribution transforming module is determined by the low-voltage load of surrounding area, and our station is 10kV power distribution station, is two sections of bus wiring.Every section of bus You Yi road inlet wire, five tunnel outlets, a station is with becoming.Between one or two sections of buses, there is block switch.The outlet of every road can be become and to terminal use, be powered by connection transformer station of subordinate or case.
It is planning unit that core space distribution network planning be take the grid of dividing, and first take its payload as foundation, and each grid is arranged the switchyard of some, as the 10kV main power supply in grid.Switchyard inlet wire is from different 110(35) kV transformer station, mainly along urban planning road, lay; Its 10kV and low-pressure line-outgoing lay along community internal passageway, and do not cross over or cross over less urban planning road as far as possible, so just form take grid as basis, some relatively independent, supply districts sheet district power distribution net of juxtaposition not.
The utility model inlet wire configuration optical-fiber longitudinal difference protection, gives full play to the function that switchyard extends as the 10kV of transformer station bus, sets up cable ring-system sufficient power supply is provided for core space.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.Those skilled in the art, read after foregoing, for multiple modification of the present utility model with to substitute will be all apparent.Therefore, protection range of the present utility model should be limited to the appended claims.
Claims (8)
1. a kV switchyard, it is characterized in that, this switchyard comprises by first paragraph bus (201) and the second segment bus (202) of block switch cabinet (5) series connection, every section of bus connects respectively one and returns back out line (4) back into line (1) and five, and described outlet (4) is gone back docking station with becoming (6).
2. 10 kV switchyards as claimed in claim 1; it is characterized in that; described inlet wire (1) connects transformer station; the current transformer (101) that this inlet wire (1) comprises series connection and circuit breaker (102); current transformer (101) detects the magnitude of current of inlet wire, for optical-fiber longitudinal difference protection gathers the magnitude of current, if the magnitude of current numerical value gathering is greater than setting value; protection action, cut-off breaker (102).
3. 10 kV switchyards as claimed in claim 2, it is characterized in that, described inlet wire (1) also comprises potential indicator (103) and earthing switch blade (104), after this potential indicator (103) and earthing switch blade (104) parallel connection, the current transformer (101) that series connection is described, when inlet wire has electricity, potential indicator (103) shows red, grounding switch when line maintenance (104) ground connection.
4. 10 kV switchyards as claimed in claim 1; it is characterized in that; circuit breaker (401) summation current transformer (402) that described outlet (4) comprises series connection; current transformer (402) detects the magnitude of current of outlet; for optical-fiber longitudinal difference protection gathers the magnitude of current; if the magnitude of current numerical value gathering is greater than setting value, protection action, cut-off breaker (401).
5. 10 kV switchyards as claimed in claim 4, it is characterized in that, described outlet (4) also comprises potential indicator (403) and earthing switch blade (404), after this potential indicator (403) and earthing switch blade (404) parallel connection, the current transformer (402) that series connection is described, when outlet has electricity, potential indicator (403) shows red, grounding switch when line maintenance (404) ground connection.
6. 10 kV switchyards as claimed in claim 1; it is characterized in that; circuit breaker (501) summation current transformer (502) that described block switch cabinet (5) comprises series connection; block switch cabinet plays prepared auto restart effect, and circuit breaker while normally moving (501) disconnects, when prepared auto restart protection is enabled; if wherein a road inlet wire dead electricity causes one section of bus dead electricity; after open failure service entrance switch, circuit breaker (501) closes, and is the bussed supply of dead electricity.
7. 10 kV switchyards as claimed in claim 1, it is characterized in that, plug-in strip (601), the fuse (602) that described station comprises series connection with change (6), the use of standing become transformer (603) and earthing switch blade (604), ground connection when described plug-in strip (601) overhauls with change (6) at station, disconnect at ordinary times, fuse (602) prevents station change overcurrent, stands and provides outlet power supply with becoming transformer (603), ground connection when earthing switch blade (604) overhauls with change at station.
8. 10 kV switchyards as claimed in claim 1; it is characterized in that; in described switchyard; every section of bus also connects a lightning arrester and voltage transformer storehouse (3); described lightning arrester and voltage transformer storehouse (3) comprise threephase potential transformer (301); and the lightning arrester (302) in parallel with this threephase potential transformer (301), threephase potential transformer (301) gathers busbar voltage for relaying protection, and lightning arrester (302) plays bus lightning protection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420147486.7U CN203813220U (en) | 2014-03-31 | 2014-03-31 | 10 kV switching station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420147486.7U CN203813220U (en) | 2014-03-31 | 2014-03-31 | 10 kV switching station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813220U true CN203813220U (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420147486.7U Expired - Lifetime CN203813220U (en) | 2014-03-31 | 2014-03-31 | 10 kV switching station |
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| Country | Link |
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| CN (1) | CN203813220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855618A (en) * | 2014-03-31 | 2014-06-11 | 国网上海市电力公司 | 10kV switching station |
-
2014
- 2014-03-31 CN CN201420147486.7U patent/CN203813220U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855618A (en) * | 2014-03-31 | 2014-06-11 | 国网上海市电力公司 | 10kV switching station |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |