CN103855618A - 10kV switching station - Google Patents
10kV switching station Download PDFInfo
- Publication number
- CN103855618A CN103855618A CN201410122556.8A CN201410122556A CN103855618A CN 103855618 A CN103855618 A CN 103855618A CN 201410122556 A CN201410122556 A CN 201410122556A CN 103855618 A CN103855618 A CN 103855618A
- Authority
- CN
- China
- Prior art keywords
- transformer
- current
- station
- bus
- inlet wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a 10kV switching station which comprises a first bus section and a second bus section which are serially connected with each other through a section switching cabinet, wherein each bus section is connected with a first-loop inlet wire and a fifth-loop outlet wire respectively, and the outlet wire is connected with a station transformer. According to the switching station disclosed by the invention, the inlet wire is configured with an optical fiber longitudinal differential protection, the function of extending a 10kV bus when the switching station is used as a transformer substation is fully developed, and a sufficient power supply is provided by additionally arranging a cable looped network in a core area.
Description
Technical field
The present invention 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 national each provinces and regions and municipality directly under the Central Government first place.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, this just has higher requirement to whole city's power supply capacity level.
1210.41 square kilometres of Pudong New Area, Shanghai whole district areas, 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 for the Party Central Committee, State Council from nineteen ninety.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 whole city's maximum, most active district, Pudong New District is comprising that all many-sides such as economic development, industrial transformation lead the whole city.
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.
Summary of the invention
The invention provides a kind of 10 kV switchyards, 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 invention 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, in the time that inlet wire has electricity, potential indicator shows red, grounding switch ground connection in the time of 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, in the time that outlet has electricity, potential indicator shows red, grounding switch ground connection in the time of line maintenance.
The circuit breaker summation current transformer that described block switch cabinet comprises series connection; block switch cabinet plays prepared auto restart effect; when normal operation, circuit breaker disconnects; in the time that 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, fuse, the use of standing that described station comprises series connection with change 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 station change overcurrent, stand and provide outlet power supply with change transformer, earthing switch blade at station when becoming maintenance ground connection.
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.
Inlet wire configuration optical-fiber longitudinal difference protection of the present invention, 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 invention.
Embodiment
Following according to Fig. 1, illustrate preferred embodiment of the present invention.
As shown in Figure 1, the invention provides a kind of 10 kV switchyards, this switchyard comprises first paragraph bus 201 and the second segment bus 202 of connecting by block switch cabinet 5, 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, in the time that inlet wire has electricity, potential indicator 103 shows red, grounding switch 104 ground connection in the time of line maintenance.
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, in the time that outlet has electricity, potential indicator 403 shows red, grounding switch 404 ground connection in the time of line maintenance.
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 be powered to terminal use by connection transformer station of subordinate or case.
Core space distribution network planning is take the grid divided as planning unit, and first take its payload as foundation, 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 lay along urban planning road; 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, not sheet district power distribution nets of juxtaposition of supply district.
Inlet wire configuration optical-fiber longitudinal difference protection of the present invention, 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 invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Read after foregoing those skilled in the art, for multiple modification of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention 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, in the time that inlet wire has electricity, potential indicator (103) shows red, grounding switch in the time of 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, in the time that outlet has electricity, potential indicator (403) shows red, grounding switch in the time of 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 operation (501) disconnects, in the time that 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), fuse (602), the use of standing that described station comprises series connection with change (6) 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 |
|---|---|---|---|
| CN201410122556.8A CN103855618A (en) | 2014-03-31 | 2014-03-31 | 10kV switching station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410122556.8A CN103855618A (en) | 2014-03-31 | 2014-03-31 | 10kV switching station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103855618A true CN103855618A (en) | 2014-06-11 |
Family
ID=50862960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410122556.8A Pending CN103855618A (en) | 2014-03-31 | 2014-03-31 | 10kV switching station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103855618A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658872A (en) * | 2017-10-24 | 2018-02-02 | 国网山东省电力公司经济技术研究院 | A kind of electric network reconstruction method for optimizing the access of 35 kv substations |
| CN109244847A (en) * | 2018-11-07 | 2019-01-18 | 国网河南省电力公司郑州供电公司 | A kind of novel underground 10kV switching station |
| CN109510193A (en) * | 2018-11-16 | 2019-03-22 | 广东电网有限责任公司 | A kind of distribution switchyard segmentation backup auto-activating device and its operation method |
| CN112952984A (en) * | 2021-02-24 | 2021-06-11 | 云谷技术(珠海)有限公司 | Host, device and method for spare power automatic switching |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334627A (en) * | 2001-08-17 | 2002-02-06 | 清华大学 | Relay protection and failure location system for power distribution network |
| CN103457262A (en) * | 2013-08-20 | 2013-12-18 | 国家电网公司 | Energy-saving and cost-reducing power source double-loop grid knot line system |
| CN203813220U (en) * | 2014-03-31 | 2014-09-03 | 国网上海市电力公司 | 10 kV switching station |
-
2014
- 2014-03-31 CN CN201410122556.8A patent/CN103855618A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334627A (en) * | 2001-08-17 | 2002-02-06 | 清华大学 | Relay protection and failure location system for power distribution network |
| CN103457262A (en) * | 2013-08-20 | 2013-12-18 | 国家电网公司 | Energy-saving and cost-reducing power source double-loop grid knot line system |
| CN203813220U (en) * | 2014-03-31 | 2014-09-03 | 国网上海市电力公司 | 10 kV switching station |
Non-Patent Citations (1)
| Title |
|---|
| 张金华: "《上海电网10kV开关站典型设计及应用研究》", 《上海交通大学工程硕士学位论文》, 31 December 2010 (2010-12-31) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658872A (en) * | 2017-10-24 | 2018-02-02 | 国网山东省电力公司经济技术研究院 | A kind of electric network reconstruction method for optimizing the access of 35 kv substations |
| CN107658872B (en) * | 2017-10-24 | 2021-04-06 | 国网山东省电力公司经济技术研究院 | Power grid transformation method for optimizing 35KV substation access |
| CN109244847A (en) * | 2018-11-07 | 2019-01-18 | 国网河南省电力公司郑州供电公司 | A kind of novel underground 10kV switching station |
| CN109510193A (en) * | 2018-11-16 | 2019-03-22 | 广东电网有限责任公司 | A kind of distribution switchyard segmentation backup auto-activating device and its operation method |
| CN112952984A (en) * | 2021-02-24 | 2021-06-11 | 云谷技术(珠海)有限公司 | Host, device and method for spare power automatic switching |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103840439B (en) | Main website coordinates the power distribution automation guard method realized with distributed terminal | |
| CN103855713A (en) | Power distribution net rack wiring structure | |
| RU154342U1 (en) | OPEN DISTRIBUTION DEVICE OF SUBSTATION | |
| CN103872682A (en) | Switching station feeder line automatic protection method | |
| CN103855618A (en) | 10kV switching station | |
| CN103872687A (en) | Power distribution network rack wiring structure | |
| CN103855712A (en) | Power distribution net rack wiring structure | |
| CN203942280U (en) | Distribution Network Frame wiring construction | |
| CN103887777A (en) | Automatic feeder protecting method for overhead line four-section three-contact structure | |
| CN103904564A (en) | High-voltage distribution device with double breakers used for single bus segmentation and application thereof | |
| Debnath et al. | Power System Fault Detection and Analysis of Distribution Line from Utility Perspective | |
| CN203813216U (en) | 10 kV ring network power distribution station | |
| CN203813220U (en) | 10 kV switching station | |
| CN103872688A (en) | Automatic protecting method for double-annular-ring four-power-supply structure feeder | |
| CN203813436U (en) | Power distribution network rack wiring structure | |
| CN104953562A (en) | Single-ring network tie-line three-power supply structure feeder automatic protection method | |
| CN202042813U (en) | Switch type 10 kV temporary box type power transformation device | |
| CN204992580U (en) | Expanded not repeated fixed measuring equipment of dual power supply | |
| Ko | A study on the agent (protective device)-based fault determination and separation methodology for smart grid distribution system | |
| CN204905877U (en) | Mountain area low voltage distribution system with reactive compensation function | |
| Wang et al. | The electric energy loss in overhead ground wires of 110kV six-circuit transmission line on the same tower | |
| CN204290066U (en) | Low-voltage comprehensive distribution box wiring system | |
| CN207459723U (en) | Spare phase transformer quickly puts into arrangement | |
| CN203813437U (en) | Power distribution network rack wiring structure | |
| CN203813438U (en) | Power distribution net rack wiring structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140611 |