CN207339266U - Medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction - Google Patents
Medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction Download PDFInfo
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- CN207339266U CN207339266U CN201720830509.8U CN201720830509U CN207339266U CN 207339266 U CN207339266 U CN 207339266U CN 201720830509 U CN201720830509 U CN 201720830509U CN 207339266 U CN207339266 U CN 207339266U
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Abstract
It the utility model is related to distribution transformer wiring construction, specifically a kind of medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction, including medium voltage switchyard or ring-main unit, medium pressure switchyard or ring-main unit are connected by A1 A2 lines and C1 C2 lines with two high voltage substations, two high voltage substations at the same time power medium voltage switchyard or ring-main unit, and the A1 A2 lines are integrally formed dual-ring network wiring construction with C1 C2 lines；The electric energy output end of medium pressure switchyard or ring-main unit is connected with distribution transformer by middle pressure branch line, which becomes distribution transformer specially to become distribution transformer or monotropic switchgear house or public case change distribution transformer or rack；The electric energy output end of medium pressure switchyard or ring-main unit is connected with the double change distribution structures of at least one first order by middle pressure branch line.The utility model can reduce the scheduled outage time, improves customer power supply reliability and improve power supply quality.
Description
Technical field
The utility model is related to distribution transformer wiring construction, especially one kind can reduce scheduled outage time, lifting use
The medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction of family power supply reliability and lifting power supply quality.
Background technology
As distribution network users improve power supply quality requirement increasingly, reliability index becomes in distribution network planning to be paid close attention to
Hot spot.Consider the double access wiring constructions of distribution transformer layer, especially realize dual power supply, dual-ring network feeder line layer wiring construction
Under the conditions of, implement the double accesses of distribution transformer low-voltage customer to part important area, can further lift power supply reliability.
State Intellectual Property Office 2011 year 06 month discloses a Publication No. CN201868899U on the 15th, entitled《In
Low-voltage network double-loop network wiring mode》, the wiring construction is dual power supply, dual-ring network wiring construction, is press-fitted in not yet providing
Wiring construction between piezoelectric transformer；
State Intellectual Property Office 2013 year 09 month discloses a Publication No. CN102368612A on the 25th, entitled《One
Three pairs of modes of connection of kind medium voltage distribution network》, the wiring construction is high voltage substation dual power supply, feeder line layer double loop and distribution
The double accesses of transformer layer, have that the fault outage time is short, processing mode is simple, reliability is high, and model is relatively fixed, is easy to expand
The features such as exhibition, grid structure is clear, and the method for operation is flexible.Distribution transforming " double accesses " is opened using the switching of distribution transforming 10kV sides Bidirectional load
Close, realize that 10kV lateral incisions are changed, this wiring not yet considers low-voltage customer not power down, i.e., really realizes the double accesses of user；
State Intellectual Property Office discloses a Publication No. CN201420258673.2 on October 1st, 2014, entitled
《A kind of medium voltage distribution network wiring construction》Utility model patent.The patent relates generally to the middle pressure feeder line between high voltage substation
Layer wiring construction, forms feeder line layer dual power supply, hand in hand formula wiring construction, improves circuit reliability and utilization rate；
State Intellectual Property Office discloses a Publication No. ZL201520873605.1 on April 6th, 2016, entitled
《A kind of chain type group network system of medium voltage distribution network》, " four pairs of lines " spare wiring construction forms the double electricity of two groups of feeder line layers each other
Source, dual-ring network wiring construction, higher than the power supply reliability of traditional wired structure, troubleshooting mode is simple.
Above-mentioned technical proposal only relates to middle pressure feeder line layer wiring construction, or three pairs of wiring, realizes power supply reliability, but still
The double accesses of low-voltage customer are not realized really, power supply reliability still has the space further improved.
Utility model content
The purpose of this utility model, which is to provide one kind, can reduce scheduled outage time, lifting customer power supply reliability and lifting
The medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction of power supply quality.
The technical solution used to achieve the above object is such, i.e. medium-voltage distribution transformer dijection low pressure prepared auto restart
Wiring construction, including medium voltage switchyard or ring-main unit, medium pressure switchyard or ring-main unit pass through A1-A2 lines and C1-C2
Line is connected with two high voltage substations, which at the same time powers medium voltage switchyard or ring-main unit, the A1-
A2 lines are integrally formed dual-ring network wiring construction with C1-C2 lines；It is characterized in that：
The electric energy output end of medium pressure switchyard or ring-main unit is connected with distribution transformer by middle pressure branch line, should
Distribution transformer becomes distribution transformer or rack change distribution transformer specially to become distribution transformer or monotropic switchgear house or public case
Device；
The electric energy output end of medium pressure switchyard or ring-main unit is connected with least one first by middle pressure branch line
Level is double to become distribution structure, and the double distribution structures that become of the first order include two medium-voltage distribution transformers, medium pressure switchyard again
Or busbar is pressed respectively to go out in one time to press branch line dijection to two medium-voltage distribution in two sections of the electric energy output end of ring-main unit
The high-voltage side bus of transformer, the low-pressure side bus of two medium-voltage distribution transformers are switched by low voltage liaison net to be connected, should
Low pressure backup auto-activating device is provided with low voltage liaison net switch；
In use, the low-pressure side bus of two medium-voltage distribution transformers of the first order distribution structure connect with low-voltage load
Connect.
Further：The high-voltage side bus of double two medium-voltage distribution transformers for becoming distribution structure of the first order are in
Pressure branch line is connected with the double change distribution structures in a second level, and the second level is double to become distribution structures and the double change distribution structures of the first order
Structure it is identical；
In use, the low-pressure side bus of two medium-voltage distribution transformers of the first order distribution structure connect with low-voltage load
Connect；The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level are connected with low-voltage load.
Further：The high-voltage side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level lead to
Cross middle pressure branch line and be connected with the double change distribution structures of a third level, the third level is double to become distribution structures and the double change distribution of the first order
The structure of the double change distribution structures of structure or the second level is identical；
In use, the low-pressure side bus of two medium-voltage distribution transformers of the first order distribution structure connect with low-voltage load
Connect；The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level are connected with low-voltage load；It is described
The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure of the third level are connected with low-voltage load.
Further：The high-voltage side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level lead to
Cross middle pressure branch line and be connected with a monotropic switchgear house or public case change distribution transformer or rack change distribution transformer；
In use, the low-pressure side bus of two medium-voltage distribution transformers of the first order distribution structure connect with low-voltage load
Connect；The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level are connected with low-voltage load；It is described
Monotropic switchgear house or public case become distribution transformer or the electric energy output end of rack change distribution transformer is connected with low-voltage load.
Structure described in the utility model this have the advantage that：The dual power supply switched immediately can be provided for low-voltage customer load to supply
Electricity；Either middle pressure branch line or low-voltage circuit be when there are N-1 failures, low-voltage customer can be by low voltage liaison net switch at
Low pressure backup auto-activating device obtains power supply；The scheduled outage time can be reduced, lifted customer power supply reliability, power supply quality, economy,
Reliability reaches the requirement of pertinent regulations.
Brief description of the drawings
The utility model can be further illustrated by the nonlimiting examples that attached drawing provides.
Fig. 1 is the structure diagram of the utility model.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples：
Referring to attached drawing 1, the medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction in figure, including medium voltage switchyard or
Ring-main unit 1, medium pressure switchyard or ring-main unit 1 are connected by A1-A2 lines and C1-C2 lines with two high voltage substations,
Two high voltage substations at the same time power medium voltage switchyard or ring-main unit 1, and the A1-A2 lines are integrally formed with C1-C2 lines
Dual-ring network wiring construction；It is characterized in that：
The electric energy output end of medium pressure switchyard or ring-main unit 1 is connected with distribution transformer 2 by middle pressure branch line,
The distribution transformer 2 becomes distribution transformer or rack change distribution specially to become distribution transformer or monotropic switchgear house or public case
Transformer；
The electric energy output end of medium pressure switchyard or ring-main unit 1 is connected with least one first by middle pressure branch line
Level is double to become distribution structure 3, and the double distribution structures 3 that become of the first order include two medium-voltage distribution transformers 301 again, and medium pressure is opened
Close pressure busbar in two sections of the electric energy output end of station or ring-main unit 1 and respectively go out in one time to press 302 dijection of branch line to described two
The high-voltage side bus 303 of medium-voltage distribution transformer, the low-pressure side bus 304 of two medium-voltage distribution transformers are joined by low pressure
305 connection of network switch, the low voltage liaison net are provided with low pressure backup auto-activating device in switching 305；
In use, the low-pressure side bus 304 and low pressure of two medium-voltage distribution transformers 301 of the first order distribution structure
Load connection.
In above-described embodiment, preferably：Double two medium-voltage distribution transformers 301 for becoming distribution structure 3 of the first order
High-voltage side bus 303 are connected with the double change distribution structures 4 in a second level by middle pressure branch line, and the second level is double to become distribution structures
4 is identical with the structure of the double change distribution structures 3 of the first order；
In use, the low-pressure side bus 304 and low pressure of two medium-voltage distribution transformers 301 of the first order distribution structure
Load connection；The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure 4 in the second level connect with low-voltage load
Connect.
Further：The high-voltage side bus of double two medium-voltage distribution transformers for becoming distribution structure 4 in the second level lead to
Cross middle pressure branch line and be connected with the double change distribution structures 5 of a third level, the double distribution structures 5 that become of the third level are matched somebody with somebody with double become of the first order
The structure of the double change distribution structures 4 of electric structure 3 or the second level is identical；
In use, the low-pressure side bus 304 of two medium-voltage distribution transformers 301 of the first order distribution structure 3 with it is low
Pressure load connection；The low-pressure side bus and low-voltage load of double two medium-voltage distribution transformers for becoming distribution structure 4 in the second level
Connection；The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure 5 of the third level are connected with low-voltage load.
Further：The high-voltage side bus of double two medium-voltage distribution transformers for becoming distribution structure 4 in the second level
One monotropic switchgear house is connected with by middle pressure branch line or public case becomes distribution transformer or rack becomes distribution transformer 6；
In use, the low-pressure side bus 304 of two medium-voltage distribution transformers 301 of the first order distribution structure 3 with it is low
Pressure load connection；The low-pressure side bus and low-voltage load of double two medium-voltage distribution transformers for becoming distribution structure 4 in the second level
Connection；The monotropic switchgear house or public case become distribution transformer or rack become the electric energy output end of distribution transformer 6 with it is low
Pressure load connection.
Structure described in above-described embodiment, can provide the dual power supply switched immediately for low-voltage customer load；In either
When N-1 failures occur in pressure branch line or low-voltage circuit, low-voltage customer can pass through the low pressure prepared auto restart at low voltage liaison net switch
Device obtains power supply；The scheduled outage time can be reduced, lifts customer power supply reliability, power supply quality, economy, reliability reach
The requirement of pertinent regulations.
Obviously, above-mentioned all embodiments are the part of the embodiment of the utility model, instead of all the embodiments.It is based on
Embodiment described in the utility model, those skilled in the art are obtained all other without making creative work
Embodiment, belongs to the category of the utility model protection.
In conclusion due to said structure, the scheduled outage time can be reduced, customer power supply reliability is improved and improves
Power supply quality.
Claims (4)
1. a kind of medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction, including medium voltage switchyard or ring-main unit, described
Medium voltage switchyard or ring-main unit are connected by A1-A2 lines and C1-C2 lines with two high voltage substations, two high voltage substations
Power at the same time to medium voltage switchyard or ring-main unit, the A1-A2 lines are integrally formed dual-ring network wiring construction with C1-C2 lines；Its
It is characterized in that：
The electric energy output end of medium pressure switchyard or ring-main unit is connected with distribution transformer by middle pressure branch line, the distribution
Transformer becomes distribution transformer or rack change distribution transformer specially to become distribution transformer or monotropic switchgear house or public case；
The electric energy output end of medium pressure switchyard or ring-main unit is connected with least one first order pair by middle pressure branch line
Become distribution structure, the double distribution structures that become of the first order include two medium-voltage distribution transformers, medium pressure switchyard or ring again
Busbar is pressed respectively to go out in one time to press branch line dijection to two medium-voltage distribution transformations in two sections of the electric energy output end of net unit
The high-voltage side bus of device, the low-pressure side bus of two medium-voltage distribution transformers are switched by low voltage liaison net to be connected, the low pressure
Low pressure backup auto-activating device is provided with interconnection switch；
In use, the low-pressure side bus of two medium-voltage distribution transformers of the first order distribution structure are connected with low-voltage load.
2. medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction according to claim 1；It is characterized in that：It is described
The high-voltage side bus of double two medium-voltage distribution transformers for becoming distribution structures of the first order are connected with one the by middle pressure branch line
Two level is double to become distribution structure, and the structure that the double change distribution structures in the second level become distribution structure with the first order pair is identical；
In use, the low-pressure side bus of two medium-voltage distribution transformers of the first order distribution structure are connected with low-voltage load；
The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level are connected with low-voltage load.
3. medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction according to claim 2；It is characterized in that：It is described
The high-voltage side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level are connected with one by middle pressure branch line
The double change distribution structures of the third level, the double change distribution structures of third level change distribution structure double with the first order or the double change distribution knots in the second level
The structure of structure is identical；
In use, the low-pressure side bus of two medium-voltage distribution transformers of the first order distribution structure are connected with low-voltage load；
The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level are connected with low-voltage load；Described 3rd
The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure of level are connected with low-voltage load.
4. medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction according to claim 2；It is characterized in that：It is described
The high-voltage side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level are connected with one by middle pressure branch line
Monotropic switchgear house or public case become distribution transformer or rack becomes distribution transformer；
In use, the low-pressure side bus of two medium-voltage distribution transformers of the first order distribution structure are connected with low-voltage load；
The low-pressure side bus of double two medium-voltage distribution transformers for becoming distribution structure in the second level are connected with low-voltage load；It is described monotropic
Switchgear house or public case become distribution transformer or the electric energy output end of rack change distribution transformer is connected with low-voltage load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720830509.8U CN207339266U (en) | 2017-07-10 | 2017-07-10 | Medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720830509.8U CN207339266U (en) | 2017-07-10 | 2017-07-10 | Medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction |
Publications (1)
| Publication Number | Publication Date |
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| CN207339266U true CN207339266U (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720830509.8U Expired - Fee Related CN207339266U (en) | 2017-07-10 | 2017-07-10 | Medium-voltage distribution transformer dijection low pressure prepared auto restart wiring construction |
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| Country | Link |
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| CN (1) | CN207339266U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066319A (en) * | 2018-09-20 | 2018-12-21 | 深圳供电规划设计院有限公司 | A kind of substation low-voltage side wiring construction |
| CN110120664A (en) * | 2019-04-22 | 2019-08-13 | 国网北京市电力公司 | A kind of reliable urban power distribution network grid structure of intelligence |
| CN111082422A (en) * | 2019-12-31 | 2020-04-28 | 国网河北省电力有限公司 | Composite grid structure capable of reliably supplying power |
| CN113162005A (en) * | 2021-04-23 | 2021-07-23 | 国网北京市电力公司 | Medium voltage distribution network system |
-
2017
- 2017-07-10 CN CN201720830509.8U patent/CN207339266U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066319A (en) * | 2018-09-20 | 2018-12-21 | 深圳供电规划设计院有限公司 | A kind of substation low-voltage side wiring construction |
| CN110120664A (en) * | 2019-04-22 | 2019-08-13 | 国网北京市电力公司 | A kind of reliable urban power distribution network grid structure of intelligence |
| CN110120664B (en) * | 2019-04-22 | 2022-02-22 | 国网北京市电力公司 | Intelligent and reliable urban power distribution network grid structure |
| CN111082422A (en) * | 2019-12-31 | 2020-04-28 | 国网河北省电力有限公司 | Composite grid structure capable of reliably supplying power |
| CN113162005A (en) * | 2021-04-23 | 2021-07-23 | 国网北京市电力公司 | Medium voltage distribution network system |
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