CN110460044A - 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind and its application method - Google Patents
10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind and its application method Download PDFInfo
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- CN110460044A CN110460044A CN201910732865.XA CN201910732865A CN110460044A CN 110460044 A CN110460044 A CN 110460044A CN 201910732865 A CN201910732865 A CN 201910732865A CN 110460044 A CN110460044 A CN 110460044A
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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
Abstract
The present invention relates to a kind of 10 kilovolts of medium voltage distribution network operation with closed ring systems and its application methods, it is characterized in that, including the first substation, the second substation, first switch station, second switch station, third switchyard and the 4th switchyard, wherein, first switch station, second switch station, third switchyard and the 4th switchyard are all made of single-trunk segmental wiring mode；The I section bus that 10 kilovolts of bus outlets of the first substation are sequentially connected in series first switch station, second switch station, third switchyard and the 4th switchyard forms monocycle web frame；The II section bus that 10 kilovolts of bus outlets of the second substation are sequentially connected in series first switch station, second switch station, third switchyard and the 4th switchyard forms monocycle web frame, and the present invention can be widely applied in power supply-distribution system technical field.
Description
Technical field
The present invention relates to a kind of 10 kilovolts of medium voltage distribution network operation with closed ring systems and its application methods, belong to power supply and distribution system
System technical field.
Background technique
For the electric network composition scheme of 10 kilovolts of Urban Medium Voltage Distribution Networks, the prior art generally uses " closed loop design, open loop
The mode of operation ".
High reliability service area medium voltage distribution network uses operation with closed ring pattern, and controller switching equipment meets N-1 verification, and feeder line is equipped with
Longitudinal differential protection can be by protective relaying device quickly by event when one section of power supply line or a power supply unit failure
Phragma can not have a power failure power supply from, non-faulting section.Chinese generally to use open loop operation electric network composition, i.e., interconnection switch, which is in, opens
State, controller switching equipment general satisfaction N-1 verification, feeder line are equipped with overcurrent protection, current quick, zero-sequenceprotection etc., distribution
Automation is using centralized, intelligent distributed or formula troubleshooting mode on the spot, when one section of power supply line or a power supply unit
When failure, by power distribution automation and protective relaying device quickly by fault location, isolation, interconnection switch closure realizes non-event
Hinder section continued power, has the advantages that the method for operation is simple, short circuit current is lesser.
But when an error occurs, it is born since the switchgear of power distribution automation equipment control line road need to be relied on to realize
Lotus turns to supply, compared to can operation with closed ring electric network composition, power supply reliability is relatively low.
Summary of the invention
In view of the above-mentioned problems, the 10 kilovolt medium voltage distribution network closed loops high the object of the present invention is to provide a kind of power supply reliability
Operating system and its application method.
To achieve the above object, the present invention takes following technical scheme: a kind of 10 kilovolts of medium voltage distribution network operation with closed ring systems
System, which is characterized in that the operation with closed ring system include the first substation, the second substation, first switch station, second switch station,
Third switchyard and the 4th switchyard, wherein the first switch station, second switch station, third switchyard and the 4th switchyard
It is all made of single-trunk segmental wiring mode；10 kilovolts of bus outlets of first substation are sequentially connected in series described first and open
The I section bus for closing station, second switch station, third switchyard and the 4th switchyard forms monocycle web frame；Second substation
10 kilovolts of bus outlets be sequentially connected in series the first switch station, second switch station, third switchyard and the 4th switchyard
II section bus formed monocycle web frame；10 kilovolts of bus outlets of first substation and the second substation, described first
Switchyard, second switch station, third switchyard and the 4th switchyard bus inlet-outlet line and the first switch station, second
Breaker is provided on the output end of switchyard, third switchyard and the 4th switchyard；The first switch station, second switch
It stands, be provided with bar coupler between third switchyard and the I section bus and II sections of buses of the 4th switchyard.
Further, in a normal mode, each breaker is in closed state, each bar coupler
It is in opening state.
Further, 10 KV line protective device main protections of the operation with closed ring system use longitudinal differential protection device.
A kind of application method of 10 kilovolts of medium voltage distribution networks operation with closed ring system, which comprises the following steps: 1)
The high voltage distribution network of planning region is planned；10 kilovolts of medium voltage distribution network operation with closed ring systems are constructed, to planning region
10 kilovolts of medium voltage distribution networks are planned；0.4 kilovolt of low-voltage network of planning region is planned；2) according to high voltage power distribution
The Electric Power Network Planning of net, 10 kilovolts of medium voltage distribution networks and 0.4 kilovolt of low-voltage network is based on user information, selects the access of user
Voltage class；And the voltage class and and web form of selection access power distribution network.
Further, the detailed process that the high voltage distribution network to planning region is planned are as follows: according to high voltage distribution network
Higher level's power supply point, construct the electric network composition of high voltage distribution network, determine substation's electric power loop；Power transformation to high voltage distribution network
It stands, short-circuit current level and planned, complete the Electric Power Network Planning of high voltage distribution network.
Further, the step is planned the substation of high voltage distribution network, short-circuit current level and route type selecting specific
Process are as follows: determine the construction form of substation in high voltage distribution network, main transformer allocation plan, electrical main connecting wire form, 10 kilovolts go out
Line returns several and reactive compensation；It is returned according to determining construction form, main transformer allocation plan, electrical main connecting wire form, 10 kilovolts of outlets
Several and reactive compensation determines that each voltage class fault control of substation in high voltage distribution network is horizontal；To the line of high voltage distribution network
Road type selecting is planned: it is horizontal according to each voltage class fault control of determining substation, determine route in high voltage distribution network
Construction form and conductor cross-section, complete the Electric Power Network Planning of high voltage distribution network.
Further, 10 kilovolts of medium voltage distribution network operation with closed ring systems of the building, to being press-fitted in 10 kilovolts of planning region
The detailed process that power grid is planned are as follows: 10 kilovolts of medium voltage distribution network operation with closed ring systems of building；To 10 kilovolts of medium voltage distribution networks
Capacity of distribution transform, switchyard construction, route type selecting and relaying configuration planned, complete the power grid rule of 10 kilovolts of medium voltage distribution networks
It draws.
Further, described to the capacity of distribution transform of 10 kilovolts of medium voltage distribution networks, switchyard construction, route type selecting and relaying configuration
The detailed process planned are as follows: determine that the lectotype selection of distribution transformer in 10 kilovolts of medium voltage distribution network operation with closed ring systems is former
Then, device model and capacity and construction mode；According to lectotype selection principle, device model and the capacity of determining distribution transformer
And construction mode, determine the construction form and inlet-outlet line time that each switchyard uses in 10 kilovolts of medium voltage distribution network operation with closed ring systems
Number；The construction form and inlet-outlet line feeder number used according to determining each switchyard, determines 10 kilovolts of medium voltage distribution network closed loops
The construction form and conductor cross-section of route in operating system；The relaying configuration of 10 kilovolts of medium voltage distribution networks is planned: being determined
10 KV line of 10 kilovolts of medium voltage distribution network operation with closed ring systems are protected after planning capacity of distribution transform, switchyard construction and route type selecting
Protection unit completes the Electric Power Network Planning of 10 kilovolts of medium voltage distribution networks.
Further, the detailed process that 0.4 kilovolt of low-voltage network to planning region is planned are as follows: determine 0.4
The grid structure of kilovolt low-voltage network, building is adapted to the mode of connection of different user types, and determines conductor selection.
Further, the user information in the step 2) includes that user applies to install capacity, peak load, load nature of electricity consumed and important
Degree.
The invention adopts the above technical scheme, which has the following advantages: 1, operation with closed ring system of the invention can
It solves existing medium voltage distribution network open loop operation system power supply reliability and promotes bottleneck problem, in the item for keeping 100% turn of load confession
Under part, the maximum load rate of each section of route can reach 83.3% in the present invention.When one section of power supply line or a power supply unit event
, can be by power distribution automation quickly by Fault Isolation when barrier, faulty section realizes " zero second " automatism isolation, and non-faulting section is realized not
Interruptedly supplying power.Due to two power supplys (i.e. two 10 kilovolts be arranged in the first substation 1 and the second substation 2 of ring network power supply
Bus) it is all from the same bus of same substation, same power supply point not will form voltage difference, can be by operation with closed ring short circuit electricity
Flow control is in the reasonable scope.2, the present invention is provided and is pressed in 10 kilovolts on the basis of considering the electric network composition of higher level substation
The application method of power distribution network operation with closed ring system, specifies lectotype selection and relaying configuration scheme, and planning and designing personnel only need root
It is designed according to the actual conditions of planning region, the efficiency and accuracy of planning and designing can be greatly improved, can be widely applied
In power supply-distribution system technical field.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of operating system of the present invention；
Fig. 2 is the flow chart of the method for the present invention.
Specific embodiment
Come to carry out detailed description to the present invention below in conjunction with attached drawing.It should be appreciated, however, that attached drawing has been provided only more
Understand the present invention well, they should not be interpreted as limitation of the present invention.In the description of the present invention, it is to be understood that,
Term " first ", " second " etc. are only used for the purpose of description, are not understood to indicate or imply relative importance.
As shown in Figure 1,10 kilovolts of medium voltage distribution network operation with closed ring systems of the invention, including the first substation 1, second become
Power station 2, first switch station 3, second switch station 4, third switchyard 5 and the 4th switchyard 6, wherein first switch station 3, second
Switchyard 4, third switchyard 5 and the 4th switchyard 6 are all made of single-trunk segmental wiring mode.
10 kilovolts of bus outlets of the first substation 1 are sequentially connected in series first switch station 3, second switch station 4, third are opened
The I section bus at station 5 and the 4th switchyard 6 is closed, monocycle web frame is formed.10 kilovolts of bus outlets of the second substation 2 are successively gone here and there
Connection connection first switch station 3, second switch station 4, third switchyard 5 and the 4th switchyard 6 II section bus, formation Single-ring network knot
Structure.
10 kilovolts of bus outlets of the first substation 1 and the second substation 2, first switch station 3, second switch station 4, third
Bus inlet-outlet line and first switch station 3, second switch station 4, the third switchyard 5 and of switchyard 5 and the 4th switchyard 6
Breaker 7, and first switch station 3, second switch station 4, third switchyard 5 and are provided on the output end of four switchyards 6
Bar coupler 8 is provided between the I section bus and II sections of buses of four switchyards 6.
Under normal mode (i.e. each component does not have failure), each breaker 7 is in closed state, to form looped network formula
Operation of power networks mode；Each bar coupler 8 is in opening state, and difference may be implemented by the bar coupler 8
Contact between looped network.
In a preferred embodiment, 10 KV line of 10 kilovolts of medium voltage distribution network operation with closed ring systems of the present invention are protected
Protection unit main protection can use longitudinal differential protection device, and configure perfect back-up protection.
Based on 10 kilovolts of medium voltage distribution network operation with closed ring systems of the invention, as shown in Fig. 2, 10 kilovolts provided by the invention
The application method of medium voltage distribution network operation with closed ring system, comprising the following steps:
1) high voltage distribution network of planning region (containing 110 kilovolts, 66 kilovolts, 35 kilovolts) is planned, specifically:
1.1) higher level's electric network composition is planned: according to higher level's power supply point of high voltage distribution network, constructs high voltage distribution network
Electric network composition, determine substation's electric power loop.
1.2) substation of high voltage distribution network is planned: determines construction form, the master of substation in high voltage distribution network
Become allocation plan, electrical main connecting wire form, 10 kilovolts of outlets time numbers and reactive compensation etc..
1.3) short-circuit current level of high voltage distribution network is planned: substation in high voltage distribution network after determining planning substation
Each voltage class fault control it is horizontal.
1.4) the route type selecting of high voltage distribution network is planned: determines high voltage power distribution after planning substation and short-circuit current level
The construction form of route and conductor cross-section etc., complete the Electric Power Network Planning of high voltage distribution network in net.
2) 10 kilovolts of medium voltage distribution network operation with closed ring systems are constructed, 10 kilovolts of medium voltage distribution networks of planning region are advised
It draws, specifically:
2.1) electric network composition of 10 kilovolts of medium voltage distribution networks is planned, that is, constructs 10 kilovolts of medium-voltage distributions of the invention
The dual-ring network electric network composition of net operation with closed ring system.
2.2) capacity of distribution transform of 10 kilovolts of medium voltage distribution networks is planned: determines 10 kilovolts of medium voltage distribution network operation with closed ring
Lectotype selection principle, device model and the capacity of distribution transformer and construction mode etc. in system.
2.3) the switchyard construction of 10 kilovolts of medium voltage distribution networks is planned: is determined after planning capacity of distribution transform in 10 kilovolts
It is press-fitted the construction form and inlet-outlet line feeder number that each switchyard uses in power grid operation with closed ring system.
2.4) the route type selecting of 10 kilovolts of medium voltage distribution networks is planned: determines planning capacity of distribution transform and switchyard construction
The construction form of route and conductor cross-section etc. in 10 kilovolts of medium voltage distribution network operation with closed ring systems afterwards.
2.5) relaying configuration of 10 kilovolts of medium voltage distribution networks is planned: planning capacity of distribution transform, switchyard construction and line
After the type selecting of road, cooperate the network running mode of 10 kilovolts of medium voltage distribution network operation with closed ring systems, reasonably selects and be press-fitted in 10 kilovolts
10 KV line protective devices of power grid operation with closed ring system, complete the Electric Power Network Planning of 10 kilovolts of medium voltage distribution networks.
3) 0.4 kilovolt of low-voltage network of planning region is planned: determines the rack knot of 0.4 kilovolt of low-voltage network
Structure, building is adapted to the mode of connection of different user types, and determines conductor selection.
4) user accesses: being advised according to the power grid of high voltage distribution network, 10 kilovolts of medium voltage distribution networks and 0.4 kilovolt of low-voltage network
It draws, capacity, peak load, load nature of electricity consumed and significance level etc. is applied to install for information, through technology and economy comparison, selection based on user
The access voltage class of user, wherein for special important user, it is also necessary to negotiate user and be equipped with uninterrupted emergency power supply
(UPS) etc. facilities, user's access capacity and power supply voltage level are recommended as shown in table 1 below:
Table 1: user's access capacity and power supply voltage level recommendation tables
5) simultaneously, according to information such as distributed electrical Source Type and installed capacitys, the voltage class of selection access power distribution network and
And web form, check influence of the distributed generation resource to power grid, wherein power grid voltage class is as shown in table 2 below:
Table 2: power grid voltage class
| Power supply total capacity range | Grid-connected voltage grade |
| 8kW and following | 220V |
| 8kW~400kW | 380V |
| 400kW~6MW | 10kV |
| 6MW~50MW | 20kV、35kV、66kV、110kV |
Below by the use of specific embodiment 10 kilovolts of medium voltage distribution network operation with closed ring systems that the present invention will be described in detail
Method:
1) high voltage distribution network of planning region is planned:
Electric network composition: layouting according to 220 kv substations, constructs 110 kv grid bilateral source chain structures, stands interior single
Platform main transformer power supply comes from different higher level substations.
Substation: indoor construction form, 4 × 50,000 kilovolt-amperes of final scale configurations, the 10 kilovolts of outlets 12 of every main transformer are used
It returns.
Short-circuit current level: 110 kilovolts of busbar short-circuit levels of current of substation are controlled by 40 kilo-amperes, 10 kilovolts of busbar short-circuit electric currents
Level is controlled by 31.5 kilo-amperes.
Route type selecting: 110 KV line all use cable, and first section route uses 1000 square millimeters, and secondary segment route is adopted
With 800 square millimeters, conductor cross-section is once selected, and is laid using the independent power cabin of pipe gallery.
2) 10 kilovolts of medium voltage distribution networks of planning region are planned:
Electric network composition: using the dual-ring network electric network composition of 10 kilovolts of medium voltage distribution network operation with closed ring systems of the invention.
Capacity of distribution transform: public distribution transformers preferentially select energy saving and environment friendly, low-loss low noise dry-type transformer, separate unit
Optional 1000,630,400 kilovolt-amperes of transformer capacity, every switchgear house installs 2 and the above distribution transforming.
Switchyard construction: for switchyard using single mother partition wiring, 4 return back out line back into line, 8~12.
Route type selecting: 10 KV line all use cable, and conductor cross-section is once selected, 400 squares of millis of trunk line options
Rice, is preferentially laid using the independent power cabin of pipe gallery by 300 square millimeters of branch's line options, is powered to responsible consumer
Double back cable run, be preferably arranged in different cabins.
Relaying configuration: to meet high reliability request and cooperation dual-ring network Electromagnetic coupling mode, 10 KV line protection dress
It sets main protection and is all made of current comparison pilot protection, and have the function of complete back-up protection.
3) 0.4 kilovolt of low-voltage network of planning region is planned:
For grid structure based on dijection wiring, wired power is 0.4 kilovolt different quoted from different switchgear houses or same switchgear house
Bus, 240 square millimeters of economic voltage loss.
4) user accesses:
While power grid provides the service of high power supply reliability, user should require the internal electricity of optimization according to its power supply reliability
It is horizontal to reinforce operation management for web frame, uniform external emergency power supply interface standard, lifting means configuration standard and quality.For
Special responsible consumer, user side should also provide the uninterrupted emergency power supply (UPS) of high quality for oneself, when realizing external electrical network abnormal electrical power supply
Millisecond switching power supply, ensures that user does not have a power failure in equipment life cycle management.
5) distributed generation resource accesses:
Distributed generation resource can be directly accessed the 0.4 of distribution transformer by the distributed generation resource for capacity less than 200 kilowatts
Kilovolt side；When distributed generation resource capacity be greater than 200 kilowatt hours, 10 kilovolts of medium voltage distribution network branch lines are preferably accessed, when to power quality
When being affected, 10 kilovolts of buses of substation are accessed preferably in the form of special line and are dissolved.
In conclusion the 10 kilovolts of medium voltage distribution network operation with closed ring systems constructed using the present invention, and to the operation with closed ring
System carries out specifying its configuration mode, and carry out example demonstration, the results showed that construct 10 kilovolts of the present invention than choosing analysis in detail
Power supply reliability can be greatly improved in medium voltage distribution network operation with closed ring system, can provide technology for the region of high reliability demand
Support.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, should all cover within the scope of the claims of the present invention.
Claims (10)
1. a kind of 10 kilovolts of medium voltage distribution network operation with closed ring systems, which is characterized in that the operation with closed ring system includes the first power transformation
It stands, the second substation, first switch station, second switch station, third switchyard and the 4th switchyard, wherein the first switch
It stands, second switch station, third switchyard and the 4th switchyard are all made of single-trunk segmental wiring mode；
10 kilovolts of bus outlets of first substation are sequentially connected in series the first switch station, second switch station, third
The I section bus of switchyard and the 4th switchyard forms monocycle web frame；10 kilovolts of bus outlets of second substation are successively
The II section bus that the first switch station, second switch station, third switchyard and the 4th switchyard is connected in series forms Single-ring network
Structure；
10 kilovolts of bus outlets of first substation and the second substation, the first switch station, second switch station, third
The bus inlet-outlet line and the first switch station, second switch station, third switchyard and the 4th of switchyard and the 4th switchyard
Breaker is provided on the output end of switchyard；The first switch station, second switch station, third switchyard and the 4th switch
Bar coupler is provided between the I section bus and II sections of buses stood.
2. 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind as described in claim 1, which is characterized in that in normal mode
Under, each breaker is in closed state, and each bar coupler is in opening state.
3. 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind as described in claim 1, which is characterized in that the operation with closed ring
10 KV line protective device main protections of system use longitudinal differential protection device.
4. a kind of application method of 10 kilovolts of medium voltage distribution network operation with closed ring systems, which comprises the following steps:
1) high voltage distribution network of planning region is planned；10 kilovolts of medium voltage distribution network operation with closed ring systems are constructed, to planning
10 kilovolts of medium voltage distribution networks in region are planned；
0.4 kilovolt of low-voltage network of planning region is planned；
2) according to the Electric Power Network Planning of high voltage distribution network, 10 kilovolts of medium voltage distribution networks and 0.4 kilovolt of low-voltage network, believed based on user
Breath, selects the access voltage class of user；And the voltage class and and web form of selection access power distribution network.
5. the application method of 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind as claimed in claim 4, which is characterized in that
The detailed process that the high voltage distribution network to planning region is planned are as follows:
According to higher level's power supply point of high voltage distribution network, the electric network composition of high voltage distribution network is constructed, determines substation's electric power loop；
The substation of high voltage distribution network, short-circuit current level and route type selecting are planned, the Electric Power Network Planning of high voltage distribution network is completed.
6. the application method of 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind as claimed in claim 5, which is characterized in that
The detailed process that the substation of high voltage distribution network, short-circuit current level and route type selecting are planned are as follows:
Determine construction form, main transformer allocation plan, the electrical main connecting wire form, 10 kilovolts of outlets time of substation in high voltage distribution network
Several and reactive compensation；
Several and reactive compensation is returned according to determining construction form, main transformer allocation plan, electrical main connecting wire form, 10 kilovolts of outlets,
Determine that each voltage class fault control of substation in high voltage distribution network is horizontal；
It is horizontal according to each voltage class fault control of determining substation, determine route in high voltage distribution network construction form and
Conductor cross-section completes the Electric Power Network Planning of high voltage distribution network.
7. the application method of 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind as claimed in claim 4, which is characterized in that
10 kilovolts of medium voltage distribution network operation with closed ring systems of the building, the tool that 10 kilovolts of medium voltage distribution networks of planning region are planned
Body process are as follows:
Construct 10 kilovolts of medium voltage distribution network operation with closed ring systems；
To capacity of distribution transform, the switchyard of 10 kilovolts of medium voltage distribution networks are built, route type selecting and relaying configuration are planned, 10 are completed
The Electric Power Network Planning of kilovolt medium voltage distribution network.
8. the application method of 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind as claimed in claim 7, which is characterized in that
The capacity of distribution transform to 10 kilovolts of medium voltage distribution networks, switchyard build, route type selecting and relaying configuration planned it is specific
Process are as follows:
Determine lectotype selection principle, device model and the capacity of distribution transformer in 10 kilovolts of medium voltage distribution network operation with closed ring systems
And construction mode；
According to lectotype selection principle, device model and the capacity and construction mode of determining distribution transformer, determine in 10 kilovolts
It is press-fitted the construction form and inlet-outlet line feeder number that each switchyard uses in power grid operation with closed ring system；
The construction form and inlet-outlet line feeder number used according to determining each switchyard determines 10 kilovolts of medium voltage distribution network closed loop fortune
The construction form and conductor cross-section of route in row system；
The 10000 of 10 kilovolts of medium voltage distribution network operation with closed ring systems after determining planning capacity of distribution transform, switchyard construction and route type selecting
Hint line protection device completes the Electric Power Network Planning of 10 kilovolts of medium voltage distribution networks.
9. the application method of 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind as claimed in claim 4, which is characterized in that
The detailed process that 0.4 kilovolt of low-voltage network to planning region is planned are as follows:
Determine the grid structure of 0.4 kilovolt of low-voltage network, building is adapted to the mode of connection of different user types, and determination is led
Line selection type.
10. the application method of 10 kilovolts of medium voltage distribution network operation with closed ring systems of one kind as claimed in claim 4, feature exist
In the user information in the step 2) includes that user applies to install capacity, peak load, load nature of electricity consumed and significance level.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN109149575A (en) * | 2018-09-29 | 2019-01-04 | 许继集团有限公司 | A kind of ring-main unit and bicyclic net type power distribution network |
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| CN108631312A (en) * | 2018-06-19 | 2018-10-09 | 国网福建省电力有限公司漳州供电公司 | A kind of power distribution network mode of connection |
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| 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 |
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