CN103855713A - Power distribution net rack wiring structure - Google Patents
Power distribution net rack wiring structure Download PDFInfo
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- CN103855713A CN103855713A CN201410122560.4A CN201410122560A CN103855713A CN 103855713 A CN103855713 A CN 103855713A CN 201410122560 A CN201410122560 A CN 201410122560A CN 103855713 A CN103855713 A CN 103855713A
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Abstract
The invention discloses a power distribution net rack wiring structure which comprises multiple switch stations and substations, wherein each switch station comprises a first section of bus and a second section of bus connected in series through a section switch; each section of bus is connected with an incoming line, multiple outgoing lines and a connection line respectively; two incoming lines of each switch station are connected with different substations respectively; the connection line is arranged between the switch stations; one end of the connection line is connected with the first section of bus of one switch station, and the other end of the connection line is connected with the second section of bus of the other switch station. The power distribution net rack wiring structure disclosed by the invention has flexible operation mode and high reliability; with a centralized power supply mode of the switch stations, the operation and maintenance management is facilitated; the incoming line and connection line of each switch station are configured with optical-fiber longitudinal differential protection, and the section switch and connection switch of the bus of each switch station are configured with spare power automatic switching and expansion spare power automatic switching, so that the fault elimination of the distribution network and the power supply of the non-fault section can be accelerated, the fault-caused power failure time is reduced, the power supply reliability is improved, and the power distribution net rack wiring structure is suitable for the regions with insufficient medium-voltage interval of substations, limited outgoing line corridors, centralized loads and high reliability requirements.
Description
Technical field
The present invention relates to a kind of Distribution Network Frame wiring construction.
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 GCP reached 2.01 trillion RMB, 11 of whole world ranks.GCP and per capita disposable income all occupy national each provinces and regions and municipality directly under the Central Government first place per capita.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.
Represent the international Advanced Cities such as the Singapore, Tokyo, Hong Kong, Paris of world-class level although the historical power supply reliability of Pudong's core space, at home in higher level, is compared, gap is larger.2013, State Grid Corporation of China promulgated " distribution network planning designing technique directive/guide ", proposed large size city nucleus to be defined as A+ region, integrated with world-class level, realized power supply reliability higher than 99.999% developing goal.Therefore, no matter be the power supply service level in international metropolis's core city, or the developing goal of State Grid Corporation of China's technology directive/guide proposition, all Pudong's core space is proposed to higher power supply reliability requirement.
Aspect 10kV medium voltage distribution network grid structure, core space is compared Guo Wang company, Shanghai company Guidelines, belongs to lack of standardization, atypical phenomenon and mainly contains three kinds:
1, overhead wire segmentation capacity is bigger than normal, gets in touch with on the low side;
2, do not meet current techniques principle according to the III type power distribution station of old standard construction;
3, there is atypia wiring in overhead wire.
And by the international advanced metropolis of contrast distribution net work structure, as Tokyo, Singapore, Hong Kong, Paris etc., the deficiency that sums up the current rack existence of core space comprises:
1, to share rate higher at part transformer station interval;
2, on switchyard, level power supply, all from the different buses of same transformer station, belongs to secondary duplicate supply;
3, on most of looped network, level power supply, from the different buses of same transformer station (switchyard), belongs to secondary duplicate supply;
4, switchyard total number is on the low side, 10kV interval anxiety;
5, exist large looped network to overlap little ring network structure, power distribution automation is disposed and brought technical difficulty;
6, rack is laterally got in touch with weakness, and rack load transfer ability is limited.
For solving above-mentioned power distribution network rack aspect existing problems, core space need be strengthened distribution grid structure, optimizes the mode of connection, reduce circuit Rate of average load, strengthen load transfer ability, study and define normalized distribution Connection Mode, and according to unified standard, high-quality construction.
Summary of the invention
The invention provides a kind of Distribution Network Frame wiring construction, power supply reliability is high, and switchyard centrally connected power supply pattern, is convenient to operation management.
In order to achieve the above object, the invention provides a kind of Distribution Network Frame wiring construction, in this Distribution Network Frame wiring construction, comprise some switchyards and transformer station, described switchyard comprises first paragraph bus and the second segment bus of connecting by block switch, every section of bus connects respectively one back into line, some line and interconnections of returning back out, two of this switchyard connects respectively different transformer stations back into line, interconnection is set between switchyard, one end of interconnection connects the first paragraph bus of a switchyard, and the other end of interconnection connects the second segment bus of another switchyard.
On described interconnection, interconnection switch is set, described interconnection switch is separately positioned on the side and first paragraph bus one side that is connected another switchyard that connect a switchyard second segment bus.
The interconnection switch of connecting valve station second segment bus one side is for often driving stand-by heat switch, and the interconnection switch of first paragraph bus one side at connecting valve station is normally closed switch.
Optical-fiber longitudinal difference protection module is set on the inlet wire of described switchyard.
Block switch on optical-fiber longitudinal difference protection module, switchyard on the inlet wire of described switchyard is connected respectively prepared auto restart and expansion backup auto-activating device with the interconnection switch on interconnection.
Overcurrent, zero stream protection module and intelligent distributed distribution terminal are set in the outlet of described switchyard.
Overcurrent, zero stream protection module and optical-fiber longitudinal difference protection module are set on the interconnection of described switchyard.
Current transformer and circuit breaker that described optical-fiber longitudinal difference protection module comprises series connection.
Operational mode of the present invention is flexible; reliability is high; switchyard centrally connected power supply pattern, is convenient to operation management, switchyard inlet wire and interconnection configuration optical-fiber longitudinal difference protection; switchyard busbar sectional izing switch and tie switches allocation prepared auto restart and expansion prepared auto restart; can accelerate Distribution Network Failure and eliminate, and the power supply of non-fault section, the fault outage time reduced; contribute to improve power supply reliability, be applicable to press in transformer station interval deficiency, electric outgoing line corridor is limited, load is concentrated and reliability requirement is high region.
Brief description of the drawings
Fig. 1 is circuit structure block diagram of the present invention.
Fig. 2 is the reduced graph of switchyard in the present invention.
Fig. 3 is the contact illustraton of model of switchyard in the present invention.
Embodiment
Following according to Fig. 1～Fig. 3, illustrate preferred embodiment of the present invention.
The invention provides a kind of Distribution Network Frame wiring construction, in this Distribution Network Frame wiring construction, comprise some switchyards and transformer station, described switchyard comprises first paragraph bus and the second segment bus of connecting by block switch, every section of bus connects respectively one back into line, some line and interconnections of returning back out, two of this switchyard connects respectively different transformer stations back into line, interconnection is set between switchyard, one end of interconnection connects the first paragraph bus of a switchyard, and the other end of interconnection connects the second segment bus of another switchyard.
On described interconnection, interconnection switch is set, described interconnection switch is separately positioned on the side and first paragraph bus one side that is connected another switchyard that connect a switchyard second segment bus, the interconnection switch of connecting valve station second segment bus one side is for often driving stand-by heat switch, and the interconnection switch of first paragraph bus one side at connecting valve station is normally closed switch.
Optical-fiber longitudinal difference protection module is set on the inlet wire of described switchyard, in the time of circuit internal fault, can realizes quick-action completely, selectively, tripping faulty line fast, current transformer and circuit breaker that this optical-fiber longitudinal difference protection module comprises series connection.
Block switch on optical-fiber longitudinal difference protection module, switchyard on the inlet wire of described switchyard is connected respectively prepared auto restart and expansion backup auto-activating device with the interconnection switch on interconnection.
Overcurrent, zero stream protection module and intelligent distributed distribution terminal are set in the outlet of described switchyard, and track section fault, after the isolated fault of distribution self-healing distribution terminal, recovers wiretap and interconnection switch and makes circuit restoring power supply in non-broken-down section.
Overcurrent, zero stream protection module and optical-fiber longitudinal difference protection module are set on the interconnection of described switchyard, in the time of interconnection internal fault, can realize quick-action completely, selectively, tripping faulty line fast.
Described prepared auto restart and expansion backup auto-activating device have distant place switching control function, and the power supply that non-fault dead electricity section can switch to other paths by backup auto-activating device is powered.
As shown in Figure 1, in figure, show switchyard A, switchyard B and switchyard C, and transformer station 1, transformer station 2, the annexation of transformer station 3 and transformer station 4, first paragraph bus and the second segment bus of switchyard A are connected by block switch QF11, first paragraph bus and the second segment bus of switchyard B are connected by block switch QF12, first paragraph bus and the second segment bus of switchyard C are connected by block switch QF13, the inlet wire JX1 that the first paragraph bus 11 of switchyard A connects connects the bus 22 of transformer station 1, the inlet wire JX2 that the second segment bus 12 of switchyard A connects connects the bus 23 of transformer station 2, the inlet wire that the first paragraph bus of switchyard B connects connects the bus 22 of transformer station 1, the inlet wire that the second segment bus of switchyard B connects connects the bus 23 of transformer station 2, the inlet wire that the first paragraph bus of switchyard C connects connects the bus of transformer station 4, the inlet wire that the second segment bus of switchyard C connects connects the bus of transformer station 3, between the first paragraph bus 11 of switchyard A and the second segment bus of switchyard C, interconnection 101 ' is set, the first paragraph bus 11 of connecting valve station, one end A of this interconnection 101 ', the second segment bus of other end connecting valve station C, between the second segment bus 12 of switchyard A and the first paragraph bus of switchyard B, interconnection 101 is set, the second segment bus of one section of connecting valve station A of this interconnection 101, the first paragraph bus of other end connecting valve station B, between the second segment bus of switchyard B and the first paragraph bus of switchyard C, interconnection 101 ' is set ', this interconnection 101 ' ' the second segment bus of connecting valve station, one end B, the first paragraph bus of other end connecting valve station C.
As shown in Figure 1, interconnection switch QF15 and interconnection switch QF16 are set on described interconnection 101, interconnection switch QF15 is arranged on connecting valve station A second segment bus 12 1 sides, and for often driving stand-by heat switch, interconnection switch QF16 is arranged on connecting valve station B first paragraph bus one side; Interconnection switch QF19 and interconnection switch QF14 are set on described interconnection 101 ', and interconnection switch QF19 is arranged on connecting valve station C second segment bus one side, and for often driving stand-by heat switch, interconnection switch QF14 is arranged on connecting valve station A first paragraph bus one side; Described interconnection 101 ' ' on interconnection switch QF17 and interconnection switch QF18 are set, interconnection switch QF17 is arranged on connecting valve station B second segment bus one side, interconnection switch QF18 is arranged on connecting valve station C first paragraph bus one side.
As shown in Figure 1, described switchyard A, optical-fiber longitudinal difference protection module is set on the inlet wire of switchyard B and switchyard C, current transformer and circuit breaker that this optical-fiber longitudinal difference protection module comprises series connection, the current transformer 102 that optical-fiber longitudinal difference protection module on the inlet wire JX1 of switchyard A comprises series connection and circuit breaker Q F1 and circuit breaker Q F2, the current transformer that optical-fiber longitudinal difference protection module on the inlet wire JX2 of switchyard A comprises series connection and circuit breaker Q F3 and circuit breaker Q F4, the current transformer that optical-fiber longitudinal difference protection module on inlet wire on the first paragraph bus of switchyard B comprises series connection and circuit breaker Q F5 and circuit breaker Q F6, the current transformer that optical-fiber longitudinal difference protection module on inlet wire on the second segment bus of switchyard B comprises series connection and circuit breaker Q F7 and circuit breaker Q F8, the current transformer that optical-fiber longitudinal difference protection module on inlet wire on the first paragraph bus of switchyard C comprises series connection and circuit breaker Q F10, current transformer and circuit breaker Q F9 that optical-fiber longitudinal difference protection module on inlet wire on switchyard C second segment bus comprises series connection.
Block switch on optical-fiber longitudinal difference protection module, switchyard on the inlet wire of described switchyard is connected respectively prepared auto restart and expansion backup auto-activating device (not shown in the diagram) with the interconnection switch on interconnection.
As shown in Figure 1, three switchyards are single mother partition mode of connection, each switchyard has respectively two to return back out line back into line six, each switchyard two back into line from two different substation, between switchyard, be furnished with and between switchyard, get in touch with special line, when normal operation, three contact special line one end switch are running status, and other end switch is hot stand-by duty.The grid structure of this distribution network belongs to two main confessions two supply power mode for subsequent use, and its operational mode is flexible, and reliability is high.
As shown in Figure 2; it is the simplified model at single switch station; taking switchyard A as example; switchyard comprises the first paragraph bus 11 and the second segment bus 12 that connect by block switch QF11; first paragraph bus 11 connects inlet wire JX1 and outlet LL1; on inlet wire JX1, there is optical-fiber longitudinal difference protection module (circuit breaker Q F2); on outlet LL1, there is normally closed interconnection switch QF14; second segment bus 12 connects inlet wire JX2 and outlet LL2; on inlet wire JX2, there is optical-fiber longitudinal difference protection module (circuit breaker Q F4), on outlet LL2, have and often open stand-by heat interconnection switch QF15.
As shown in Figure 3, it is the contact illustraton of model of switchyard, switchyard D, switchyard E and switchyard F in figure, are shown, the second segment bus of switchyard D is by the first paragraph bus of interconnection connecting valve station E, the second segment bus of switchyard E passes through the first paragraph bus of interconnection connecting valve station F, the like.
Under normal operating mode, two inlet wires (power line) of switchyard are with respectively two sections of 10kV buses, 10kV block switch stand-by heat, interconnection modular design suggestion A station mono-section of bus of 10kV and C station bis-sections of bus contacts of 10kV (being convenient to modular design), A station bis-sections of buses of 10kV and mono-section of bus contact of B station 10kV, B station bis-sections of buses of 10kV and mono-section of bus contact of C station 10kV, as shown in Figure 1, form end to end circulus, agreement normal mode is that all interconnections are at bis-sections of bus bar side openings of 10kV, the i.e. interconnection switch of one section of bus bar side operation, the interconnection switch stand-by heat of two sections of bus bar side.
In the time that the inlet wire of switchyard breaks down; Distribution Network Frame wiring construction provided by the invention can be realized Fault Isolation and restore electricity, and the switchyard feeder line automatic protecting method of realizing based on Distribution Network Frame wiring construction provided by the invention can be achieved as follows four kinds of feed protections in situation:
1, switchyard single failure pattern:
Switchyard two back into the arbitrary inlet wire generation power failure dead electricity in line; optical-fiber longitudinal difference protection module action on inlet wire; longitudinal difference protection actuating signal is informed to prepared auto restart and expansion backup auto-activating device in station; the block switch prepared auto restart action of switchyard; block switch closure; dead electricity bus is powered by block switch, and interconnection prepared auto restart is now as second level standby.
As shown in Figure 1, break down as example with the inlet wire JX1 of switchyard A, first paragraph bus 11 dead electricity of switchyard A, optical-fiber longitudinal difference protection module action on inlet wire JX1, circuit breaker Q F1, QF2 tripping operation, and longitudinal difference protection actuating signal is informed to prepared auto restart and expansion backup auto-activating device in station, prepared auto restart and expansion backup auto-activating device are received longitudinal difference protection trip signal, and by there being the judgement with no pressure of pressure, the closed block switch QF11 of protection action that autotomys, the first paragraph bussed supply of recovery switchyard A;
2, switchyard double faults pattern:
All there is power failure dead electricity back into line in two of switchyard, optical-fiber longitudinal difference protection module action on inlet wire, longitudinal difference protection actuating signal is informed in station and the prepared auto restart of neighboring station and expansion backup auto-activating device, prepared auto restart and the tripping of expansion backup auto-activating device control segmentation prepared auto restart in standing, block switch disconnects, and longitudinal difference protection actuating signal and the protection actuating signal of autotomying are informed in station by communication network and neighboring station prepared auto restart and expansion backup auto-activating device, when station in and neighboring station prepared auto restart and expand backup auto-activating device receive longitudinal difference protection actuating signal and the protection actuating signal of autotomying, and by there being the judgement with no pressure of pressure, control the action of expansion prepared auto restart, on the interconnection being connected with breakdown switch station, often open stand-by heat interconnection switch closure, adjacent switch station by interconnection respectively to the first paragraph bus in breakdown switch station and second segment bussed supply, recover the power supply at breakdown switch station.
As shown in Figure 1, inlet wire JX1 and inlet wire JX2 with switchyard A all break down as example, the first paragraph bus 11 of switchyard A and second segment bus 12 dead electricity simultaneously, optical-fiber longitudinal difference protection module action on inlet wire JX1 and inlet wire JX2, circuit breaker Q F1, QF2, QF4, QF5 tripping operation, now full station has a power failure, longitudinal difference protection actuating signal is informed to prepared auto restart and expansion backup auto-activating device in station, in standing, prepared auto restart and expansion backup auto-activating device control segmentation prepared auto restart are autotomyed and are protected action tripping, block switch QF11 disconnects, longitudinal difference protection actuating signal and the protection actuating signal of autotomying are informed in station by communication network and neighboring station prepared auto restart and expansion backup auto-activating device, stand in and neighboring station prepared auto restart and expansion backup auto-activating device receive longitudinal difference protection and the protection actuating signal of autotomying simultaneously, and by there being the judgement with no pressure of pressure, control interconnection switch QF15 and interconnection switch QF19 closure, switchyard C, switchyard B is respectively with a bus by interconnection, recover the power supply of switchyard A.
3, the single maintenance model of switchyard:
N-1 maintenance mode: the arbitrary incoming power maintenance of switchyard, power by this station block switch that closes, drop into interconnection prepared auto restart.
Single fault mode under N-1 maintenance mode: while supposing a certain section of bus incoming power maintenance in A station, arrange A station block switch closure, now there is A station inlet wire operation troubles, A station interconnection LL2 prepared auto restart will start, interconnection is often opened stand-by heat interconnection switch closure, and one section, station of B bus is by one, the two section of bus in contact tape A station.
4, switchyard two-way maintenance model:
N-2 maintenance mode: A station two-way incoming power overhauls simultaneously, and JX1 and JX2 stop labour simultaneously, and now, one section, two sections, station of A bus load is stood by C respectively and B station turns confession by interconnection between station.
If the fault outage under N-2 mode occurs for A station, restore electricity by the remote control A station block switch that closes.
Switchyard two-way power supply provided by the invention is from different substation, and interconnection is set between switchyard.In the situation that losing on two-way level power supply, switchyard still can transfer load, realizes laterally for subsequent use.Interconnection is established at reserved 1 interval of every section of bus of switchyard, forms hand in hand with proximity switches station, and open loop operation, the wire diameter of interconnection is identical with switchyard inlet wire.When field condition allows and when interval resource is comparatively nervous, also can adopt the indirect interconnection of on-load to substitute interconnection, but indirectly interconnection completely cable through being consistent with link lines design wire diameter.
Switchyard inlet wire and interconnection configuration optical-fiber longitudinal difference protection; switchyard busbar sectional izing switch and tie switches allocation prepared auto restart and expansion prepared auto restart, can accelerate Distribution Network Failure and eliminate, and the power supply of non-fault section; reduce the fault outage time, contribute to improve power supply reliability.
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 amendment 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 Distribution Network Frame wiring construction, it is characterized in that, in this Distribution Network Frame wiring construction, comprise some switchyards and transformer station, described switchyard comprises first paragraph bus and the second segment bus of connecting by block switch, every section of bus connects respectively one back into line, some line and interconnections of returning back out, two of this switchyard connects respectively different transformer stations back into line, interconnection is set between switchyard, one end of interconnection connects the first paragraph bus of a switchyard, and the other end of interconnection connects the second segment bus of another switchyard.
2. Distribution Network Frame wiring construction as claimed in claim 1, it is characterized in that, on described interconnection, interconnection switch is set, described interconnection switch is separately positioned on the side and first paragraph bus one side that is connected another switchyard that connect a switchyard second segment bus.
3. Distribution Network Frame wiring construction as claimed in claim 2, is characterized in that, the interconnection switch of connecting valve station second segment bus one side is for often driving stand-by heat switch, and the interconnection switch of first paragraph bus one side at connecting valve station is normally closed switch.
4. Distribution Network Frame wiring construction as claimed in claim 1, is characterized in that, optical-fiber longitudinal difference protection module is set on the inlet wire of described switchyard.
5. Distribution Network Frame wiring construction as claimed in claim 4, is characterized in that, the block switch on optical-fiber longitudinal difference protection module, switchyard on the inlet wire of described switchyard is connected respectively prepared auto restart and expansion backup auto-activating device with the interconnection switch on interconnection.
6. Distribution Network Frame wiring construction as claimed in claim 1, is characterized in that, overcurrent, zero stream protection module and intelligent distributed distribution terminal are set in the outlet of described switchyard.
7. Distribution Network Frame wiring construction as claimed in claim 1, is characterized in that, overcurrent, zero stream protection module and optical-fiber longitudinal difference protection module are set on the interconnection of described switchyard.
8. the Distribution Network Frame wiring construction as described in claim 4 or 7, is characterized in that, current transformer and circuit breaker that described optical-fiber longitudinal difference protection module comprises series connection.
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| CN201410122560.4A CN103855713A (en) | 2014-03-31 | 2014-03-31 | Power distribution net rack wiring structure |
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