CN204668942U - There is the distribution network structure pattern of high reliability - Google Patents
There is the distribution network structure pattern of high reliability Download PDFInfo
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- CN204668942U CN204668942U CN201520298283.2U CN201520298283U CN204668942U CN 204668942 U CN204668942 U CN 204668942U CN 201520298283 U CN201520298283 U CN 201520298283U CN 204668942 U CN204668942 U CN 204668942U
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Abstract
The utility model discloses a kind of distribution network structure pattern with high reliability, comprise high voltage distribution network rack, turn for transformer station and middle pressure grade distribution network structure, high voltage distribution network rack is connected with middle pressure grade distribution network structure for transformer station by turning.Duplicate supply chain type Connection Mode is adopted between the utility model high voltage distribution network rack and turn confession transformer station, in the wiring of duplicate supply chain type, when any one direction circuit because of fault out of service time, should be able to ensure that this 110kV transformer station offside power supply realizes this electric load needed for Lian Zhong transformer station of supply, greatly improve urban core regional power supply reliability.Sectionalized single busbar connection ring connection pattern is adopted between turn confession transformer station, turn and form annular between transformer station by the interconnection being provided with interconnection switch, operation management is convenient, the utility model is realizing while high reliability powers, having taken into account and having built economy and land resource is had to the feature of environmental protection of high usage.
Description
Technical field
The utility model relates to distribution network structure structural planning pattern, especially relates to a kind of distribution network structure pattern with high reliability.
Background technology
The most important part of urban distribution network is power distribution network, and grid structure is then that can power distribution network the decisive factor of safe and highly efficient operation.Under intelligent distribution network environment, a grid structure of strong intelligence realizes the precondition that power distribution automation and communication system effectively build and run, and is also ensure mains supply reliability and Supply Security, realizes the physical basis of intelligent grid.Along with power distribution network scale expanding day, the weakness of grid structure becomes the maximum bottleneck hindering intelligent grid to build.Distribution network shelf structure is optimized in comprehensive planning can reduce via net loss on the one hand, effectively can reduce investment and maintenance cost on the other hand, more can ensure the requirement of intelligent grid construction to reliability, economy and high-efficiency low-carbon.Therefore, be necessary to support intelligent distribution network strong intelligence grid structure launch further investigation, in the process of construction of smart city for it the development of intelligent distribution network beneficial reference is provided.
But constantly accelerate along with urbanization process, built-up areas load density improves constantly, large size city is due to history and reality reason, exist in the 110kV electrical network of center to still have between the existence of part radial pattern structure, 10kV electrical network ring-main unit in distribution network planning process and lack contact, the problem that risk prevention ability is more weak.Simultaneously owing to being subject to region restriction, transformer station's enlarging needs the growth and the soil restriction that meet load simultaneously.
Utility model content
To be solved in the utility model is that existing distribution network structure mesohigh distribution network structure still lacks contact between part employing radial pattern structure, medium voltage network, risk prevention ability is weak, the technical problems such as operation management difficulty, thus the distribution network structure pattern with high reliability that a kind of security performance is high, the feature of environmental protection is good is provided.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:
Have a distribution network structure pattern for high reliability, comprise high voltage distribution network rack, turn for transformer station and middle pressure grade distribution network structure, high voltage distribution network rack is connected with middle pressure grade distribution network structure for transformer station by turning; Duplicate supply chain type is adopted to be connected between described high voltage distribution network rack with turn confession transformer station; Described high voltage distribution network rack pattern comprises two switchyards, is respectively switchyard A and switchyard B, and the first bus and second bus of each switchyard are connected in series by block switch; One of switchyard A goes out several Bulk Supply Substations of tape, and is connected with an outlet of switchyard B by interconnection through last Bulk Supply Substation; Another of switchyard B goes out several Bulk Supply Substations of tape, and is connected with another outlet of switchyard A by interconnection through last Bulk Supply Substation; Sectionalized single busbar connection ring connection pattern is adopted between described medium voltage distribution network rack and turn confession transformer station; Turn between the outlet for transformer station and form annular by the interconnection being provided with interconnection switch.
Described interconnection arranges interconnection switch.
Optical-fiber longitudinal difference protection module in described switchyard outlet, the block switch on switchyard and the interconnection switch on interconnection be linking automation detection and control terminal device respectively.
Described turn is provided with voltage regulator between transformer station and the inlet wire of medium voltage distribution network rack.
Described turn is for subsequent use each other between two for the outlet of transformer station after voltage regulator, one go out several loads of tape after be connected with another outlet for subsequent use through the normal open switch of circuit breaker.
The inlet wire of described medium voltage distribution network rack is provided with optical-fiber longitudinal difference protection module.
Described optical-fiber longitudinal difference protection module comprises current transformer and the circuit breaker of series connection.
Duplicate supply chain type Connection Mode is adopted between the utility model high voltage distribution network rack and turn confession transformer station, in the wiring of duplicate supply chain type, when any one direction circuit because of fault out of service time, should be able to ensure that this 110kV transformer station offside power supply realizes this electric load needed for Lian Zhong transformer station of supply, greatly improve urban core regional power supply reliability.Sectionalized single busbar connection ring connection pattern is adopted between turn confession transformer station, turn and form annular between transformer station by the interconnection being provided with interconnection switch, operation management is convenient, the utility model is realizing while high reliability powers, having taken into account and having built economy and land resource is had to the feature of environmental protection of high usage.
Accompanying drawing explanation
Fig. 1 is the 110kV High-Voltage Network rack mode planning figure of embodiment 1.
Fig. 2 is the electric hookup turned for transformer station of embodiment 1.
Fig. 3 is pressure network rack mode planning figure in the 10kV of embodiment 1.
Embodiment
Embodiment 1: as Figure 1-3, a kind of distribution network structure pattern with high reliability, it is characterized in that: comprise high voltage distribution network rack, turn for transformer station and middle pressure grade distribution network structure, high voltage distribution network rack is connected with middle pressure grade distribution network structure for transformer station by turning.
Duplicate supply chain type is adopted to be connected between described high voltage distribution network rack with turn confession transformer station 5; Described high voltage distribution network rack pattern comprises the switchyard of two 220kV, is respectively switchyard A and switchyard B.First bus and second bus of each switchyard are connected in series by block switch.The first bus A1 of switchyard A goes out tape 4 Bulk Supply Substations, and is connected with the outlet of the first bus B1 of switchyard B by interconnection 4 through last Bulk Supply Substation.
The second bus B2 of switchyard B goes out tape 4 Bulk Supply Substations, and is connected with the outlet of the second bus A2 of switchyard A by interconnection 4 through last Bulk Supply Substation.
Optical-fiber longitudinal difference protection module 1 is provided with in the outlet of switchyard A first bus A1 and in the outlet of switchyard B second bus B2.Described interconnection 4 all arranges interconnection switch 2.
Interconnection switch 2 on optical-fiber longitudinal difference protection module 1 in described switchyard outlet, the block switch 3 on switchyard and interconnection is linking automation detection and control terminal device respectively.
Described turn adopts unit connection mode for substation bus arrangement.Sectionalized single busbar connection ring connection pattern is adopted between described medium voltage distribution network rack and turn confession transformer station.And form annular by the interconnection being provided with interconnection switch between the outlet of turn confession transformer station.
Described turn is provided with voltage regulator 6 between transformer station and the inlet wire of medium voltage distribution network rack.The outlet turned for the Bulk Supply Substation of transformer station first passes through voltage regulator pressure regulation, and the outlet after pressure regulation is for subsequent use each other between two, and bus C I is connected with bus C III with the normal open switch through circuit breaker after several loads S through circuit breaker DL.The normal open switch of bus C II through circuit breaker after several loads of fuser belt is connected with bus C IV.Bus C I, bus C II, bus C III are connected by circuit breaker normal open switch DL with bus C IV, realize for subsequent use each other between two.
Wherein, the inlet wire of described medium voltage distribution network rack is provided with optical-fiber longitudinal difference protection module.Described optical-fiber longitudinal difference protection module comprises current transformer and the circuit breaker of series connection.
Operation principle: high voltage distribution network rack with turn for adopting duplicate supply chain type to be connected between transformer station, under normal mode, open chain runs, and it is for subsequent use each other that interconnection disconnects operation.In the wiring of duplicate supply chain type, when any one direction circuit because of fault out of service time, should be able to ensure that this turn realizes the electric load in this chain of supply needed for Bulk Supply Substation for transformer station offside power supply.Turn the side inlet wire 2 times for transformer station 110kV, interconnection 2 times.Be provided with 110/10.5kV voltage regulator 4 final period in a turn confession transformer station, individual capacity is 50MVA.110kV divides side bus to run, four, 10kV side main transformer fanout operation, and the feed outlet of 10kV side should be 56 times, adopts sectionalized single busbar connection annular to connect.110kV transformer station neutral grounding mode is the direct ground connection in 110kV side, and 10kV is through low resistance grounding.
Medium-voltage distribution circuit configuration optical-fiber longitudinal difference protection is often returned, to meet normal, the safe operation requirement of the high reliability gridding power distribution network mode of connection in looped network.
The automatic measure control terminal installation that switchyard configures, increase motor-operating mechanism, gather switching current amount and switch position signal, and carry out breakdown judge by the mode of automatic measure control terminal installation AC sampling current transformer, by optical-fibre channel, image data and signal are uploaded to distribution automation main station system, perform the guidance command of distribution automation main station system simultaneously, distant place drawing operation is carried out to circuit breaker, realizes " three is distant " function of remote control, remote measurement, remote signalling.
In order to ensure the actual demand of power supply reliability, the medium voltage distribution network of " isolated island " type city net should keep independently-powered from 110kV side, avoid being formed interconnected with extra-regional C class and D class area, therefore recommend " isolated island " city net to possess in 10kV grade and form the condition that looped network gets in touch with Connection Mode again.
In 10kV, pressure network rack mode planning figure as shown in Figure 3.In this mode, 10kV electric pressure " N-1 " fault mainly considers the out of service and branch line two kinds of situations out of service of main line.
1) when main line because of fault out of service time, failed mains institute on-load will go to the offside circuit of its Cheng Huan.When the main line of bus C I breaks down, its both sides circuit breaker DL1 and DL1-1 will disconnect, and the normal open switch in circuit will close, and bus C I outlet main line institute on-load is transferred to bus C II.
2) when branch line outlet fault is out of service, institute of faulty line subordinate on-load will be transferred to the offside circuit of its Cheng Huan.When S1 to S2 branch line because of fault out of service time, its both sides circuit breaker DL1-2 and DL1-3 will disconnect, and equally, the normal open switch in circuit will close, and institute of faulty line subordinate on-load will be transferred to bus C II.
Claims (7)
1. there is a distribution network structure pattern for high reliability, it is characterized in that: comprise high voltage distribution network rack, turn for transformer station and middle pressure grade distribution network structure, high voltage distribution network rack is connected with middle pressure grade distribution network structure for transformer station by turning; Duplicate supply chain type is adopted to be connected between described high voltage distribution network rack with turn confession transformer station; Described high voltage distribution network rack pattern comprises two switchyards, is respectively switchyard A and switchyard B, and the first bus and second bus of each switchyard are connected in series by block switch; One of switchyard A goes out several Bulk Supply Substations of tape, and is connected with an outlet of switchyard B by interconnection through last Bulk Supply Substation; Another of switchyard B goes out several Bulk Supply Substations of tape, and is connected with another outlet of switchyard A by interconnection through last Bulk Supply Substation; Sectionalized single busbar connection ring connection pattern is adopted between described medium voltage distribution network rack and turn confession transformer station; Turn between the outlet for transformer station and form annular by the interconnection being provided with interconnection switch.
2. the distribution network structure pattern with high reliability according to claim 1, is characterized in that: described interconnection arranges interconnection switch.
3. the distribution network structure pattern with high reliability according to claim 1, is characterized in that: the optical-fiber longitudinal difference protection module in described switchyard outlet, the block switch on switchyard and the interconnection switch on interconnection be linking automation detection and control terminal device respectively.
4. the distribution network structure pattern with high reliability according to claim 1, is characterized in that: described turn is provided with voltage regulator between transformer station and the inlet wire of medium voltage distribution network rack.
5. the distribution network structure pattern with high reliability according to claim 4, it is characterized in that: described turn is for subsequent use each other between two for the outlet of transformer station after voltage regulator, one go out several loads of tape after be connected with another outlet for subsequent use through the normal open switch of circuit breaker.
6. the distribution network structure pattern with high reliability according to claim 5, is characterized in that: the inlet wire of described medium voltage distribution network rack is provided with optical-fiber longitudinal difference protection module.
7. the distribution network structure pattern with high reliability according to claim 3 or 6, is characterized in that: described optical-fiber longitudinal difference protection module comprises current transformer and the circuit breaker of series connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520298283.2U CN204668942U (en) | 2015-05-11 | 2015-05-11 | There is the distribution network structure pattern of high reliability |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656037A (en) * | 2016-03-15 | 2016-06-08 | 天津大学 | Integrated safety checking method for high-voltage and medium-voltage distribution networks |
| CN106451416A (en) * | 2016-09-08 | 2017-02-22 | 上海中远船务工程有限公司 | DP3 deepwater drilling ship closed loop high voltage distribution system |
| CN106786421A (en) * | 2016-12-28 | 2017-05-31 | 国网上海市电力公司 | Relay protection scheme system and the control method handed in hand based on 110KV under powering mode |
| CN107450360A (en) * | 2017-08-01 | 2017-12-08 | 江西清华泰豪三波电机有限公司 | Improve positive pole, negative pole and positive pole and the control system of negative pole line conduction reliability |
| 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 |
| CN110867851A (en) * | 2019-11-25 | 2020-03-06 | 国网河北省电力有限公司高邑县供电分公司 | Switching station structure design method |
-
2015
- 2015-05-11 CN CN201520298283.2U patent/CN204668942U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656037A (en) * | 2016-03-15 | 2016-06-08 | 天津大学 | Integrated safety checking method for high-voltage and medium-voltage distribution networks |
| CN106451416A (en) * | 2016-09-08 | 2017-02-22 | 上海中远船务工程有限公司 | DP3 deepwater drilling ship closed loop high voltage distribution system |
| CN106786421A (en) * | 2016-12-28 | 2017-05-31 | 国网上海市电力公司 | Relay protection scheme system and the control method handed in hand based on 110KV under powering mode |
| CN107450360A (en) * | 2017-08-01 | 2017-12-08 | 江西清华泰豪三波电机有限公司 | Improve positive pole, negative pole and positive pole and the control system of negative pole line conduction reliability |
| 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 |
| CN110867851A (en) * | 2019-11-25 | 2020-03-06 | 国网河北省电力有限公司高邑县供电分公司 | Switching station structure design method |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20150923 Termination date: 20160511 |