CN106410806A - Three-circuit, two-segment and two-tie medium-voltage overhead main power distribution network and building method thereof - Google Patents
Three-circuit, two-segment and two-tie medium-voltage overhead main power distribution network and building method thereof Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
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Abstract
The invention discloses a three-circuit, two-segment and two-tie medium-voltage overhead main power distribution network and a building method thereof. The power distribution network comprises a first primary power supply segment, a second primary power supply segment, a third primary power supply segment and a triangular power supply structure, wherein the first primary power supply segment is built by a first end power supply, the second primary power supply segment is built by a second end power supply, the third primary power supply segment is built by a third end power supply, the triangular power supply structure comprises a first secondary power supply segment, a second secondary power supply segment and a third secondary power supply segment which are connected in a head-to-tail way and are in a triangular shape, and a wiring structure is arranged on each of the first secondary power supply segment, the second secondary power supply segment and the third secondary power supply segment and comprises a segment switch in a normally closed state and a connection switch in a normally open state. The power distribution network adopts a two-circuit, two-segment and two-tie structure, the structure is relatively independent, is relatively high in load transfer capability, is simple and reasonable and is particularly applicable to rural areas and new city regions, and the actual requirements of transportation inspection, dispatching and marketing management are met.
Description
Technical field
The present invention relates to a kind of middle pressure rack sky trunk power distribution network and its construction method.
Background technology
According to《Distribution network planning designing technique directive/guide》(Q/GDW 738—2012)、《Urban distribution network planning design rule
Model》(GB 50613-2010) and《Rural cadastration Guidance Rule》(DL/T 5118), middle pressure rack sky trunk is joined
Electrical network typical structure has：Single radiation wiring, simply connected network wiring and many segmentations appropriateness contact wiring.
The three of the above standard mode of connection, in traditional medium voltage distribution network is built, because the geographical distribution of load point, road are walked
To with the factors such as rising characteristic, easily cause actual rack and grid plan modification target and deviation occur.Though through roll year by year modification and
Correction, but ultimately causes the reality that network structure is unintelligible, segmentation is unreasonable, invalid contact is many, directly affects power distribution network
Turn and carry inferior capabilities for mutual, customer power supply reliability is difficult to ensure that.
Because the otherness by customer charge density, planned road network and regional development constrains, all kinds of " codes " all cannot
Sequential is built to rack and rack transient mode is carried out clearly.In order to reach the power supply capacity index of zones of different, realize joining
The growth requirement of power grid construction appropriate advance customer charge.For many years, power supply enterprise is all the time close around " customer charge is sent out
Exhibition characteristic ", " how improving grid structure, to realize the reasonable transition to final rack and evolution ", " how to realize distribution
In-depth analysis and primary study are carried out in a series of this proposition such as coordination between net investment and income ".
More particularly it is located at rural area, the power supply user in new cities and towns, due to being layouted by source substation, medium-voltage line
The constraints such as radius of electricity supply, power supply capacity, power supply quality, a large amount of trunk power distribution network performance driving economy levels are not high.Weight
Carry and underloading, situations such as transformer station's interval resource is occupied high with line load level and deposit, directly initiation is to user's
Power supply level and power supply capacity are low, and customer power supply reliability is difficult to ensure that.
Content of the invention
It is an object of the invention to provide a kind of three circuit type two segmentation two simple and reasonable, that extended capability is strong is got in touch with
Middle pressure rack sky trunk power distribution network.
The present invention also aims to providing a kind of construction method of middle pressure rack sky trunk power distribution network.
For this reason, one aspect of the present invention provides a kind of middle pressure rack sky trunk power distribution network, including：Built by first end power supply
The first one-level power-feed section, the second one-level power-feed section being built by the second end power supply and built by the 3rd end power supply the
Three one-level power-feed sections；And triangle electric power-feeding structure, it is connected to the first one-level power-feed section, the second one-level power-feed section and the 3rd
Between one-level power-feed section, connect triangular in shape the one or two grade power-feed section, the two or two grade of power-feed section and the 3rd confession including head and the tail
Electric section, wherein, the one or two grade of power-feed section, the two or two grade of power-feed section and the three or two grade of power-feed section is respectively equipped with by one point
The wiring construction of Duan Kaiguan and interconnection switch composition, wherein, a block switch keeps normally off and a contact
Switch maintains a normally open state.
Further, above-mentioned first end power supply is the first transformer, and the first one-level power-feed section is included in the first transformer
The first outlet breaker of port of export setting；Second end power supply is the second transformer, and the second one-level power-feed section is included second
The second outlet breaker of the port of export setting of transformer；And the 3rd end power supply be the 3rd transformer, the 3rd one-level powers
Section includes the 3rd outlet breaker of the port of export setting in the 3rd transformer.
Further, above-mentioned middle pressure rack sky trunk power distribution network is used for Rural Power Distribution Network or is used for new town power distribution network.
According to a further aspect in the invention, there is provided a kind of construction method of middle pressure rack sky trunk power distribution network, including following
Step：Build the first line being built by first end power supply, the second circuit being built by the second end power supply and by the 3rd
The step one of the tertiary circuit that end power supply builds；Wiring knot is respectively provided with first line, the second circuit and tertiary circuit
The step 2 of structure, wherein, wiring construction is made up of a block switch and an interconnection switch, and wherein, a segmentation is opened
Close holding normally off and an interconnection switch maintains a normally open state；And by the wiring construction in first line, the second line
The attachment structure on wiring construction and tertiary circuit on road is connected with each other, to form triangle two segmentation two contact power supply
The step 3 of structure.
Further, above-mentioned steps two include being sequentially connected in series the first block switch and first on the bus of first line
Network switchs, is sequentially connected in series the second block switch and the second interconnection switch on the bus of the second circuit and in tertiary circuit
Bus on be sequentially connected in series the 3rd block switch and the 3rd interconnection switch, wherein, separated first using the first block switch
The one-level power-feed section of circuit and two grades of power-feed sections separate, and are separated the one-level power-feed section of the second circuit using the second block switch
Separate with two grades of power-feed sections, using the 3rd block switch, the one-level power-feed section of tertiary circuit and two grades of power-feed sections are separated, step
Rapid three include connecting two grades of power-feed sections of first line to the one-level power-feed section of the second circuit, by two grades of the second circuit confessions
Electric section connects to the one-level power-feed section of tertiary circuit and connects two grades of power-feed sections of tertiary circuit to the one of first line
Level power-feed section.
Further, above-mentioned steps two include：End parallel connection the first block switch in the one-level power-feed section of first line
With the first interconnection switch；End parallel connection the second block switch and the second interconnection switch in the one-level power-feed section of the second circuit；
And in the end of the one-level power-feed section of tertiary circuit the 3rd block switch in parallel and the 3rd interconnection switch, step 3 includes：
First block switch of first line is connected by the one or two grade of power-feed section with the second interconnection switch of the second circuit；By second
Second block switch of circuit is connected by the two or two grade of power-feed section with the 3rd interconnection switch of tertiary circuit；And by the 3rd line
3rd block switch on road is connected with the first interconnection switch of first line.
The middle pressure rack sky trunk power distribution network of the present invention, gets in touch with structure using three circuit types, two segmentation two, this structure is relatively independent,
Load transfer ability is stronger, simple and reasonable, meets fortune inspection, scheduling, the actual requirement of marketing management.Particularly suitable
In rural area and new downtown areas.
Compared with the prior art, the middle pressure rack sky trunk power distribution network of the present invention has the characteristics that：
1), the power distribution network of the present invention includes 3 two segmentation two contact wiring constructions.This structure is relatively independent, supply load
Relatively stable.When the customer charge demand that this structure is accessed increases or reduces, changed by flexibly cutting, can be to other classes
Type object construction is cut and is changed, to ensure that circuit performance driving economy controls in zone of reasonableness.
2), the power distribution network of the present invention, participate in contact three-line be connected to the bus of different substation with building station between get in touch with,
The contact point of three-line has at 3.Except providing power supply by source substation bus, power-feed sections at different levels can also be passed through
The circuit that two interconnection switches of upper setting provide power supply with another two buses forms contact.Ensure line failure or
When plant-grid connection bus breaks down, remain to the power supply capacity to non-faulting section.
3), traditional medium voltage distribution network, because of factors such as the geographical distribution of load point and rising characteristics, easily causes actual rack and rule
Draw rack target and deviation occurs.Though through rolling modification year by year and rectifying a deviation, ultimately cause that network structure is unintelligible, segmentation not
Rationally, the many reality of invalid contact, directly affects turning of power distribution network and carries inferior capabilities for mutual, customer power supply reliability is difficult to
Ensure.The power distribution network of the present invention provides 1 circuit structure standard two segmentation two to get in touch with whole group respectively by 3 transformer stations and powers
Unit, has that structure is simple, turn strong for ability, and the features such as change flexible cut by rack, preferably as Urban New District, center small towns,
The empty public trunk power distribution network final period target net application of pressure rack in development park etc..
4), the power distribution network of the present invention, based on modular design specification, structure is simple, convenient to construct.This structure is compared with standard
Grid structure specifically and quantifies.The distribution of power supply area power supply point and load point can effectively be combined, and highway and
Application is carried out in circuit gallery arrangement.Not only guide the orderly construction of middle pressure mains network, reasonable evolution, greatly changed simultaneously
The resource distribution at extrusion line interval in Shan Liao transformer station, switchyard, and to power distribution network fortune inspection, scheduling, and newly-increased load
Access-in management has directive significance.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Brief description
The Figure of description constituting the part of the application is used for providing a further understanding of the present invention, the signal of the present invention
Property embodiment and its illustrate for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the framework of three circuit types, two segmentation two according to an embodiment of the invention pressure rack sky trunk power distribution network in the contact
Schematic diagram；
Fig. 2 is first of the double-circuit formula two segmentation two pressure rack sky trunk power distribution network construction method in the contact according to the present invention
The schematic diagram of embodiment；And
Fig. 3 is second of the double-circuit formula two segmentation two pressure rack sky trunk power distribution network construction method in the contact according to the present invention
The schematic diagram of embodiment.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutual
Combination.To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 1 to Fig. 3 shows some embodiments of middle pressure rack sky trunk power distribution network.
In an embodiment of the present invention, as shown in figure 1, what middle pressure rack sky trunk power distribution network included being built by first end power supply
First one-level power-feed section A-1, the second one-level power-feed section B-1 being built by the second end power supply and by the 3rd end power supply structure
The 3rd one-level power-feed section C-1 building；And triangle electric power-feeding structure, be connected to the first one-level power-feed section A-1, the 2nd 1
Between level power-feed section B-1 and the 3rd one-level power-feed section C-1, connect triangular in shape the one or two grade power-feed section including head and the tail
A-2, the two or two grade of power-feed section B-2 and the three or two grade of power-feed section C-2, wherein, the one or two grade of power-feed section A-2 be provided with by
One block switch 11 and the wiring construction of interconnection switch 12 composition, the two or two grade of power-feed section B-2 is provided with by one
Block switch 21 and the wiring construction of interconnection switch 22 composition, the three or two grade of power-feed section C-2 is provided with by one point
Duan Kaiguan 31 and the wiring construction of interconnection switch 32 composition, wherein, block switch 11,21,31 keeps normally closed
State and interconnection switch 12,22,32 maintains a normally open state.
In the present embodiment, the one or two grade of power-feed section A-2, the two or two grade of power-feed section B-2 and the three or two grade of power-feed section C-2
Form the electric power-feeding structure of triangle, have the advantage that：
1), the power distribution network of the present invention includes 3 two segmentation two contact wiring constructions.This structure is relatively independent, supply load
Relatively stable.When the customer charge demand that this structure is accessed increases or reduces, changed by flexibly cutting, can be to other classes
Type object construction is cut and is changed, to ensure that circuit performance driving economy controls in zone of reasonableness.
2), the power distribution network of the present invention, participate in contact three-line be connected to the bus of different substation with building station between get in touch with,
The contact point of three-line has at 3.Except providing power supply by source substation bus, power-feed sections at different levels can also be passed through
The circuit that two interconnection switches of upper setting provide power supply with another two buses forms contact.Ensure line failure or
When plant-grid connection bus breaks down, remain to the power supply capacity to non-faulting section.
3), traditional medium voltage distribution network, because of factors such as the geographical distribution of load point and rising characteristics, easily causes actual rack and rule
Draw rack target and deviation occurs.Though through rolling modification year by year and rectifying a deviation, ultimately cause that network structure is unintelligible, segmentation not
Rationally, the many reality of invalid contact, directly affects turning of power distribution network and carries inferior capabilities for mutual, customer power supply reliability is difficult to
Ensure.The power distribution network of the present invention provides 1 circuit structure standard two segmentation two to get in touch with whole group respectively by 3 transformer stations and powers
Unit, has that structure is simple, turn strong for ability, and the features such as change flexible cut by rack, preferably as Urban New District, center small towns,
The empty public trunk power distribution network final period target net application of pressure rack in development park etc..
4), the power distribution network of the present invention, based on modular design specification, structure is simple, convenient to construct.This structure is compared with standard
Grid structure specifically and quantifies.The distribution of power supply area power supply point and load point can effectively be combined, and highway and
Application is carried out in circuit gallery arrangement.Not only guide the orderly construction of middle pressure mains network, reasonable evolution, greatly changed simultaneously
The resource distribution at extrusion line interval in Shan Liao transformer station, switchyard, and to power distribution network fortune inspection, scheduling, and newly-increased load
Access-in management has directive significance.
In an embodiment of the present invention, as shown in figure 1, pressure rack sky trunk distribution in three circuit types being built by three end power supplys
Net includes 3 source substation.Bus A series connection first outlet breaker 13 is passed through in the outlet of the first source substation,
The outlet of second source transformer station is led to by bus B series connection second outlet breaker 23, the outlet of the 3rd source substation
Cross bus C series connection the 3rd outlet breaker 33.Set between first outlet breaker 13 and described 3rd outlet breaker 33
There is the one or two grade of power-feed section；It is provided with the two or two grade of power supply between described second outlet breaker and described first outlet breaker
Section；It is provided with the three or two grade of power-feed section between described 3rd breaker and described second breaker.Above structure is collectively forming one
Two grades of power supply segment structures of triangle.
One end of each two grades of power-feed sections is provided with a block switch, and the other end is provided with an interconnection switch, and wherein, segmentation is opened
Close and keep normally off, interconnection switch maintains a normally open state, each outlet breaker keeps normally off.First outlet open circuit
The leading-out terminal of device is connected with the one or two grade of power-feed section and the two or two grade of power-feed section respectively by one-level power-feed section A-1；Second goes out
The leading-out terminal of mouth breaker is connected with the two or two grade of power-feed section and the three or two grade of power-feed section respectively by one-level power-feed section B-1；
The leading-out terminal of the 3rd outlet breaker is passed through one-level power-feed section C-1 and is powered with the three or two grade of power-feed section and the one or two grade respectively
Duan Xianglian.
When the customer charge demand that this structure is accessed increases or reduces, changed by flexibly cutting, can be to other types target
Structure is cut and is changed, to ensure that circuit performance driving economy controls in zone of reasonableness.
Boundary condition：Commonly use cable referring to middle pressure trunk power distribution network and allow long-term work load condition table：
Single power supply segment fault：During normal operating mode, the operation load level of single line is usually no more than maximum load
70% (substantially close to 2/3) of level.Single power-feed section load level is carried out according to the 1/3 of corresponding cable load level
Constraint, you can when ensureing single power supply segment fault, non-faulting power-feed section still safe power supply.
The system failure：Lose when there is the system failure, source substation single transformer dead electricity or source substation wall scroll bus
Electricity, when being related to load transfer, single power-feed section load level enters row constraint according to the 1/3 of corresponding cable load level.
In one embodiment of this invention, as shown in Figure 2 or Figure 3, middle pressure rack sky trunk power distribution network construction method, including
Following steps：
Build the first line being built by first end power supply, the second circuit being built by the second end power supply and by the 3rd end
The step one of the tertiary circuit that power supply builds；
The step 2 of wiring construction, wherein, wiring construction are respectively provided with first line, the second circuit and tertiary circuit
It is made up of a block switch and an interconnection switch, wherein, block switch keeps normally off and a contact is opened
Pass maintains a normally open state；And
Wiring construction on wiring construction and tertiary circuit on wiring construction in first line, the second circuit is connected,
To form the step 3 that electric power-feeding structure is got in touch with triangle two segmentation two.
According to the power distribution network construction method of the present invention, every circuit is by an one-level power-feed section and two two grades of power-feed section groups
Become, electric power-feeding structure is clear, is particularly well-suited to rural area and new downtown areas.
In an embodiment of the present invention, as shown in Fig. 2 a segmentation in parallel on the one-level power-feed section A-1 of first line
Switch 11 and an interconnection switch 12, a block switch 21 and in parallel on the one-level power-feed section B-1 of the second circuit
Individual interconnection switch 22, a block switch 31 in parallel and an interconnection switch 32 on the one-level power-feed section C-1 of tertiary circuit,
Wherein, two grades of power-feed section B-2 are passed through between the interconnection switch 12 of first line and the block switch 21 of the second circuit
It is connected, the interconnection switch 22 of the second circuit is connected by two grades of power-feed section C-2 with the block switch 31 of tertiary circuit,
The formation triangle two segmentation contact electric power-feeding structure thus three two grades of power-feed sections A-2, B-2, C-2 join end to end.
In the present embodiment, the type of the wiring construction of three-line is identical, is a block switch and a contact is opened
Close in parallel.
In an embodiment of the present invention, as shown in figure 3, this three circuit types, two segmentation two contact electric power-feeding structure is by two circuit types
Electric power-feeding structure is got in touch with two segmentation two and the wiring construction of tertiary circuit is built-up.Specifically, two circuit type two segmentation two
Network electric power-feeding structure includes one-level power-feed section and two grades of power-feed sections, the one-level power-feed section of the second circuit and two grades of confessions of first line
Electric section, wherein, two grades of power-feed sections of two grades of power-feed sections of first line and the second circuit are in parallel to form the segmentation two of mutual font two
Contact electric power-feeding structure, the wiring construction on the one-level power-feed section of tertiary circuit be an interconnection switch and a block switch simultaneously
Connection.Two grades of power-feed section A-2 of first line are connected with the interconnection switch of tertiary circuit, the interconnection switch of the second circuit
It is connected with the block switch of tertiary circuit by two grades of power-feed section C-2, thus forming two segmentation two contact of triangle
Electric power-feeding structure.
In the present invention, the use normality of block switch and interconnection switch is as follows：Block switch keeps normally off and contact
Switch maintains a normally open state.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any
Modification, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of middle pressure rack sky trunk power distribution network is it is characterised in that include：
The first one-level power-feed section of being built by first end power supply, the second one-level power-feed section being built by the second end power supply,
And the 3rd one-level power-feed section by the 3rd end power supply structure；And
Triangle electric power-feeding structure, is connected to described first one-level power-feed section, the second one-level power-feed section and the 3rd one-level and supplies
Between electric section, connect triangular in shape the one or two grade power-feed section, the two or two grade of power-feed section and the 3rd power supply including head and the tail
Section,
Wherein, described one or two grade of power-feed section, the two or two grade of power-feed section and the three or two grade of power-feed section are respectively equipped with by
One block switch and the wiring construction of an interconnection switch composition, wherein, one block switch keeps normally closed
State and one interconnection switch maintains a normally open state.
2. middle pressure rack sky trunk power distribution network according to claim 1 it is characterised in that
Described first end power supply is the first transformer, and described first one-level power-feed section is included in described first transformer
The first outlet breaker of port of export setting；
Described second end power supply is the second transformer, and described second one-level power-feed section is included in described second transformer
The second outlet breaker of port of export setting；And
Described 3rd end power supply is the 3rd transformer, and described 3rd one-level power-feed section is included in described 3rd transformer
3rd outlet breaker of port of export setting.
3. middle pressure rack sky trunk power distribution network according to claim 1 is it is characterised in that medium pressure makes somebody a mere figurehead trunk
Power distribution network is used for Rural Power Distribution Network or is used for new town power distribution network.
4. a kind of construction method of middle pressure rack sky trunk power distribution network is it is characterised in that comprise the following steps：
Build the first line being built by first end power supply, the second circuit being built by the second end power supply and by the
The step one of the tertiary circuit that three end power supplys build；
The step that wiring construction is respectively provided with described first line, described second circuit and described tertiary circuit
Two, wherein, described wiring construction is made up of a block switch and an interconnection switch, wherein, one point
Duan Kaiguan keeps normally off and one interconnection switch maintains a normally open state；And
By on the wiring construction and tertiary circuit on the wiring construction in described first line, described second circuit
Attachment structure is connected with each other, to form the step 3 that electric power-feeding structure is got in touch with triangle two segmentation two.
5. middle pressure rack sky trunk power distribution network according to claim 4 construction method it is characterised in that
Described step 2 includes being sequentially connected in series the first block switch and the first contact on the bus of described first line
Switch, the second block switch and the second interconnection switch be sequentially connected in series on the bus of described second circuit and in institute
State and the 3rd block switch and the 3rd interconnection switch are sequentially connected in series on the bus of tertiary circuit, wherein, using described first
Block switch separates and separates the one-level power-feed section of described first line and two grades of power-feed sections, using described second segmentation
Switch separates and separates the one-level power-feed section of described second circuit and two grades of power-feed sections, using described 3rd block switch
The one-level power-feed section of described tertiary circuit and two grades of power-feed sections are separated,
The one-level that described step 3 includes connecting two grades of power-feed sections of described first line to described second circuit supplies
Electric section, two grades of power-feed sections of described second circuit are connected to the one-level power-feed section of described tertiary circuit and by
Two grades of power-feed sections of three circuits connect to the one-level power-feed section of described first line.
6. middle pressure rack sky trunk power distribution network according to claim 4 construction method it is characterised in that
Described step 2 includes：End parallel connection the first block switch and the in the one-level power-feed section of described first line
One interconnection switch；Open in end parallel connection second block switch of the one-level power-feed section of described second circuit and the second contact
Close；And in the end of the one-level power-feed section of described tertiary circuit the 3rd block switch in parallel and the 3rd interconnection switch,
Described step 3 includes：The second contact by the first block switch of described first line and described second circuit
Switch is connected by the one or two grade of power-feed section；By the second block switch of described second circuit and described tertiary circuit the
Three interconnection switches are connected by the two or two grade of power-feed section；And by the 3rd block switch of described tertiary circuit and described the
First interconnection switch of one circuit connects.
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| CN201610473375.9A CN106410806B (en) | 2016-06-24 | 2016-06-24 | Three circuit types two are segmented two pressure rack sky trunk power distribution networks and its construction method in the contact |
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