CN208241318U - A kind of power distribution network wiring construction - Google Patents
A kind of power distribution network wiring construction Download PDFInfo
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- CN208241318U CN208241318U CN201820675637.4U CN201820675637U CN208241318U CN 208241318 U CN208241318 U CN 208241318U CN 201820675637 U CN201820675637 U CN 201820675637U CN 208241318 U CN208241318 U CN 208241318U
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- power distribution
- substation
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- main transformer
- switch
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Abstract
The utility model discloses a kind of power distribution network wiring constructions, including at least Liang Zuo substation, substation includes 4 main transformers, wherein, the normally closed switch of at least one power distribution station that 2 main transformers, the every main transformer in substation are connected and the low-pressure side bus for connecting 2 main transformers forms a combination ring element；The low-pressure side bus that normal open switch connects the main transformer of adjacent cyclization unit is set, to realize the low-pressure side bus annular connection of main transformer in substation；The bus of at least one power distribution station of every combination ring element connects the spare connection between the bus to realize the power distribution station of cyclization unit by the bus of 2 interconnections for being provided with interconnection switch and the power distribution station of adjacent cyclization unit, the technical problem for overcoming the power supply reliability of existing power distribution network Connection Mode relatively low, effectively improves the power supply reliability of power distribution network.
Description
Technical field
The utility model relates to electrical network field, especially a kind of power distribution network wiring construction.
Background technique
The N-1 method of operation refers to any independent component (generator, transmission line of electricity, transformation in N number of element of electric system
Device etc.) break down and be removed after, should not cause because All other routes overload trip due to cause user to have a power failure, do not destroy system
Stability, do not occur the accidents such as collapse of voltage.
The N-2 method of operation refers to wantonly two independent components (generator, transmission line of electricity, transformation in N number of element of electric system
Device etc.) break down and be removed after, should not cause because All other routes overload trip due to cause user to have a power failure, do not destroy system
Stability, do not occur the accidents such as collapse of voltage.
Obviously the N-2 ratio N-1 method of operation has more security reliability.
It is the network model schematic diagram of Single-ring network with reference to Fig. 1, Fig. 2 and Fig. 3, Fig. 1；Fig. 2 is that the network model of dual-ring network shows
It is intended to；Fig. 3 is three for a standby network model schematic diagram；The power distribution network Connection Mode of existing traditional various connection of ring power network, packet
Include Single-ring network, dual-ring network and three supplies one for three kinds and its derivative Connection Mode；These Connection Modes are open loop in actual motion
Operation, although three kinds of Connection Modes meet N-1 service requirement, power supply reliability is relatively relatively low.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of the utility model is to provide a kind of power distribution network wiring constructions, for mentioning
The power supply reliability of high power grid.
The technical scheme adopted by the utility model is a kind of power distribution network wiring construction, including at least Liang Zuo substation, institute
Stating substation includes 4 main transformers；2 main transformers, every main transformer in the substation connected at least one
The normally closed switch of a power distribution station and the low-pressure side bus for connecting 2 main transformers forms a combination ring element；It is described
Substation further includes the normal open switch for realizing the low-pressure side bus annular connection of main transformer in substation, described normally opened to open
Connection connects the low-pressure side bus of the main transformer of adjacent cyclization unit；The bus of at least one power distribution station of every combination ring element is logical
The interconnection that 2 are provided with interconnection switch is crossed to connect with the bus of the power distribution station of adjacent cyclization unit to realize matching for cyclization unit
Spare connection between the bus in power station.
Further, the interconnection switch is the normal open switch and normally closed switch being connected in series.
The beneficial effects of the utility model are:
A kind of power distribution network wiring construction of the utility model, including at least Liang Zuo substation, substation include 4 main transformer pressures
Device, wherein at least one power distribution station and be used to connect 2 that 2 main transformers, every main transformer in substation are connected
The normally closed switch of the low-pressure side bus of main transformer forms a combination ring element；Normal open switch is set and connects adjacent cyclization unit
The low-pressure side bus of main transformer, to realize the low-pressure side bus annular connection of main transformer in substation；Every combination ring element
At least one power distribution station bus interconnection and adjacent cyclization unit that 2 are provided with interconnection switch power distribution station mothers
Spare connection between bus of the line connection to realize the power distribution station of cyclization unit, overcomes the power supply of existing power distribution network Connection Mode
The relatively low technical problem of reliability, effectively improves the power supply reliability of power distribution network.
Detailed description of the invention
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
Fig. 1 is the network model schematic diagram of Single-ring network；
Fig. 2 is the network model schematic diagram of dual-ring network；
Fig. 3 is three for a standby network model schematic diagram；
Fig. 4 is an a kind of specific embodiment structural schematic diagram of power distribution network wiring construction of the utility model.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
A kind of power distribution network wiring construction, including at least Liang Zuo substation, substation include 4 main transformers；In substation
2 main transformers, at least one power distribution station that every main transformer is connected and the low-pressure side for connecting 2 main transformers
The normally closed switch of bus forms a combination ring element；Substation further includes female for realizing the low-pressure side of main transformer in substation
The normal open switch of wire loop connection, normal open switch connect the low-pressure side bus of the main transformer of adjacent cyclization unit；Every group of cyclization
The bus of at least one power distribution station of unit passes through the power distribution station of 2 interconnections for being provided with interconnection switch and adjacent cyclization unit
Bus connect the spare connection between bus to realize the power distribution station of cyclization unit.Interconnection switch is the normally opened of series connection
Switch and normally closed switch.The technical problem for overcoming the power supply reliability of existing power distribution network Connection Mode relatively low, effectively improves distribution
The power supply reliability of net.
It specifically, is an a kind of specific reality of power distribution network wiring construction of the utility model with reference to Fig. 4, Fig. 4 in the present embodiment
A structural schematic diagram is applied, power distribution network wiring construction includes substation A and B Liang Zuo substation of substation, and every substation includes 4
Main transformer (#1, #2, #3, #4, #5, #6, #7 and #8 in such as Fig. 4).With main transformer #1 and its power distribution station connected, master
Transformer #2 and its power distribution station connected are formed by for cyclization unit, and main transformer #1 is connected with 3 power distribution stations, main transformer
Depressor #2 is connected with 2 power distribution stations, and each power distribution station is provided with several station power distribution transformers, and (such as each power distribution station is configured with 2
Station power distribution transformer)；The female low-pressure side bus for passing through normally closed switch K5 and main transformer #2 of the low-pressure side bus I of main transformer #1
II female connection, the 2nd power distribution station connection that the 3rd power distribution station of main transformer #1 connection is connect with main transformer #2, leads as a result,
2 power distribution stations that 3 power distribution stations, the main transformer #2 that transformer #1, main transformer #2, main transformer #1 are connected are connected,
And normally closed switch K5 constitutes a combination ring element, closes where the structure of remaining cyclization unit and main transformer #1 in substation A
The structure of ring element is identical, wherein the low-pressure side bus III of main transformer #3 is female to pass through normally closed switch K6's and main transformer #4
The female connection of low-pressure side bus IV.In addition, setting normal open switch K7 connects adjacent cyclization unit (i.e. main transformer pressure with K8 in substation A
Cyclization unit where device #1 and the cyclization unit where main transformer #3) main transformer low-pressure side bus, i.e. main transformer pressure
The low-pressure side bus I of device #1 is female to be connect by normal open switch K7 with IV mother of low-pressure side bus of main transformer #4, main transformer #2
Low-pressure side bus II it is female connect by normal open switch K8 with III mother of low-pressure side bus of main transformer #3 so that in substation A
The low-pressure side bus of main transformer forms annular connection.Structure in substation B is identical as the structure of substation A, then substation A
It in total include 4 combination ring elements with B.Finally, the bus of a power distribution station of every combination ring element passes through 2 in the present embodiment
The interconnection for being provided with interconnection switch connect power distribution station to realize cyclization unit with the bus of the power distribution station of adjacent cyclization unit
Bus between spare connection, interconnection switch be connected in series normal open switch and normally closed switch.For example, main transformer #1 institute
Cyclization unit power distribution station (i.e. the third power distribution station that main transformer #1 is connected) bus by normal open switch K21 and often
K26 and the power distribution station (i.e. the third power distribution station that main transformer #3 is connect) of cyclization unit where main transformer #3 are closed in make and break
Bus connection, the mother of the power distribution station (i.e. the third power distribution station that main transformer #1 is connected) of cyclization unit where main transformer #1
Power distribution station (the i.e. main transformer #7 institute that line passes through cyclization unit where normal open switch K24 and normally closed switch K25 and main transformer #7
The third power distribution station of connection) bus connection, and so on, the connection of remaining cyclization unit refers to Fig. 4.
In above-described embodiment, 4 main transformers of every Substation Design, main transformer paired running two-by-two, substation
Low-pressure side is using single female four section wirings, and the low-pressure side bus of two main transformers of paired running is by normally closed switch as switched
K5, K6 are connected, and pass through normal open switch such as switch K8 connection between paired running group.Two buses of paired running respectively go out a line
Road is simultaneously connected with each other Electromagnetic coupling.In addition, interconnection only plays a role when there is N-1-1/N-2/ no-voltage of entire station failure；Work as conjunction
When ring element loads absolute equilibrium, if line load rate is less than or equal to 50%, an interconnection can turn completely for power loss load；
When cyclization unit loads imbalance, the power supply capacity of an interconnection can be completed to turn to supply, but due to laod unbalance, turn to supply
Unit two lines road transfer load is different, it is likely that causes to turn for certain circuit overload in unit.Two interconnections are configured at this time
Trouble unit can be splitted into both ends when there is this failure, turn to supply by two interconnection segmentations.
With reference to Fig. 4, by taking substation A as an example, illustrate the course of work of the power distribution network when operating normally:
When normal operation, main transformer load by normally closed switch K1, K2, K3, K4 toward giving under power distribution network, normally closed switch K5, K6,
K17, K18 closure, normal open switch K7, K8, K11, K12 are disconnected, and main transformer #1, main transformer #2 and its junior's distribution network are logical
It crosses K5, K17 and forms loop-net operation, main transformer #3, main transformer #4 and its junior's distribution network pass through K6, K18 and form looped network
Operation；
With reference to Fig. 4, by taking substation A as an example, illustrate the course of work (by taking substation A as an example) when power distribution network breaks down:
1. K1, K2 either switch failure removal, do not influence to power；The excision of K1, K2 simultaneous faults, the part power loss load are logical
It crosses interconnection (K24 of substation B) and is transferred to substation B；
2. K5 switch fault is cut off, do not influence to power；
3. any segment fault of distribution outlet cuts off this section of outlet two sides switch, does not influence to power；
4. any match electrical nodes bus-bar fault, node inlet-outlet line two sides switch, node institute's on-load power-off are disconnected；
5. any match the connect distribution transforming failure of electrical nodes bus, failure distribution transforming is cut off, does not influence other users power supply.
To sum up, the power distribution network wiring construction of the utility model, power grid is able to achieve under bus " N-1 ", route " N-1 " operating condition
Complete uninterrupted power supply；It can be turned by interconnection for complete under bus " N-1-1 "/" N-2 ", route " N-1-1 "/" N-2 " operating condition
Portion's load.
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention
Or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (2)
1. a kind of power distribution network wiring construction, which is characterized in that including at least Liang Zuo substation, the substation includes 4 main transformers
Depressor；At least one power distribution station that 2 main transformers, every main transformer in the substation are connected and for connecting
The normally closed switch for stating the low-pressure side bus of 2 main transformers forms a combination ring element；The substation further include for realizing
The normal open switch of the low-pressure side bus annular connection of main transformer, the normal open switch connect adjacent cyclization unit in substation
The low-pressure side bus of main transformer；The bus of at least one power distribution station of every combination ring element is provided with interconnection switch by 2
Interconnection and adjacent cyclization unit power distribution station bus connect it is standby between bus to realize the power distribution station of cyclization unit
With connection.
2. power distribution network wiring construction according to claim 1, which is characterized in that the interconnection switch is the normal of series connection
Switch and normally closed switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820675637.4U CN208241318U (en) | 2018-05-08 | 2018-05-08 | A kind of power distribution network wiring construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820675637.4U CN208241318U (en) | 2018-05-08 | 2018-05-08 | A kind of power distribution network wiring construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208241318U true CN208241318U (en) | 2018-12-14 |
Family
ID=64581839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820675637.4U Active CN208241318U (en) | 2018-05-08 | 2018-05-08 | A kind of power distribution network wiring construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208241318U (en) |
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2018
- 2018-05-08 CN CN201820675637.4U patent/CN208241318U/en active Active
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