CN106026075A - Flexible DC back-to-back asynchronous networking method and system of power load center - Google Patents
Flexible DC back-to-back asynchronous networking method and system of power load center Download PDFInfo
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- CN106026075A CN106026075A CN201610585833.8A CN201610585833A CN106026075A CN 106026075 A CN106026075 A CN 106026075A CN 201610585833 A CN201610585833 A CN 201610585833A CN 106026075 A CN106026075 A CN 106026075A
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a flexible DC back-to-back asynchronous networking method and a flexible DC back-to-back asynchronous networking system of a power load center. The flexible DC back-to-back asynchronous networking method comprises the steps of: acquiring historical electricity utilization data of the power load center; acquiring power grid structural information of the power load center; dividing a power grid of the power load center into a predetermined number of grouped power grids according to the historical electricity utilization data and the power grid structural information; and establishing a flexible DC back-to-back power transmission system between every two grouped power grids in the predetermined number of grouped power grids, so as to realize asynchronous interconnection among the grouped power grids. By establishing the flexible DC back-to-back power transmission systems, the synchronous power grid of the power load center is isolated into the plurality of synchronous power grids, the power grid structure is simplified, the average electrical distance between the power substations is increased, the mutual influence between the alternating current and the direct current is reduced, and the problems such as short-circuit current standard exceeding, prominent mutual influence of multiple direct currents and high risk of large-scale power outage accidents of the power load center (such as a Pearl river delta power grid) can be effectively solved.
Description
Technical field
The present invention relates to technical field of power systems, more particularly, it relates to a kind of power load center
Flexible direct current back-to-back Asynchronous Interconnection method and system.
Background technology
Along with power system development, current electrical network be primarily present short circuit current exceed standard, many direct currents mutual
The problems such as impact is prominent and large area accident risk is high.Specifically, current Guangdong Power Grid mainly have with
Lower problem:
(1) grid contact is tight, and short circuit current exceeds standard
Guangdong Power Grid especially Pearl River Delta grid contact is tight, and junction quantity is many, single seat power plant, power transformation
Outlet of standing is more, and between plant stand, electrical distance is near, causes overall short circuit current level to exceed standard.
(2) direct current drop point is intensive, and alternating current-direct current influences each other prominent, and operation of power networks risk is high
Guangdong Power Grid forms the electric network composition of " tetanic weak friendship " alternating current-direct current series-parallel connection at present, holds during DC Line Fault
Easily causing large-scale power flow transfer, the stable problem of electrical network highlights.Each direct current equal drop point Pearl River Delta load
Center, single time D.C. capacity is big, and direct current drop point distance is near, influences each other relatively big, and multiple-circuit line is even
The risk of lock fault is higher, affects the stable operation of system.
(3) electric network composition is complicated, it is difficult to resist electrical network catastrophe failure
Pearl River Delta, Guangdong electrical network is complicated, and electric network composition is clear not, and trend is difficult to control to, it is difficult to construct electricity
Second, third defence line, road of net safety, the ability resisting catastrophe failure is poor, the risk of large-area power-cuts
Higher.
Therefore, how to solve the problems referred to above, be those skilled in the art need solve problem.
Summary of the invention
It is an object of the invention to provide the back-to-back Asynchronous Interconnection side of flexible direct current of a kind of power load center
Method and system, to solve short circuit current and exceed standard, many direct currents influence each other prominent and large area blackout
The problems such as risk is high.
For achieving the above object, following technical scheme is embodiments provided:
A kind of flexible direct current back-to-back Asynchronous Interconnection method of power load center, including:
The history electricity consumption data of regional in acquisition power load center；
Obtain the electric network composition information of described power load center；
According to described history electricity consumption data and described electric network composition information, by the electricity of described power load center
Net is divided into the individual electrical network of forming a team of predetermined quantity；
The each two in electrical network of being formed a team by described predetermined quantity is formed a team and is set up flexible direct current between electrical network and lean against
Back of the body transmission system, to realize forming a team the asynchronous interconnection between electrical network.
Wherein, according to described history electricity consumption data and described electric network composition information, by described electric load
The electrical network of the heart is divided into the individual electrical network of forming a team of predetermined quantity, including:
Choose N number of history electricity consumption data target area more than predetermined threshold；Wherein, N is positive integer；
According to the positional information of N number of target area, and described electric network composition information, by described electric load
The electrical network at center is divided into the individual electrical network of forming a team of predetermined quantity；Wherein, described N number of target area is described predetermined
It is uniformly distributed in the individual electrical network of forming a team of quantity.
Wherein, the history electricity consumption data of regional in described acquisition power load center, including:
Obtain the history electricity consumption data in described power load center each city interior.
Wherein, the electrical network of described power load center is divided into the individual electrical network of forming a team of predetermined quantity include:
The electrical network of described power load center is divided into two electrical networks of forming a team；Wherein, each form a team electrical network by
Looped network is constituted.
A kind of flexible direct current back-to-back Asynchronous Interconnection system of power load center, including:
First acquisition module, the history electricity consumption data of regional in obtaining power load center；
Second acquisition module, for obtaining the electric network composition information of described power load center；
Electrical network of forming a team divides module, is used for according to described history electricity consumption data and described electric network composition information,
The electrical network of described power load center is divided into the individual electrical network of forming a team of predetermined quantity；
Set up module, form a team for each two in electrical network that described predetermined quantity is formed a team and build between electrical network
The vertical back-to-back transmission system of flexible direct current, to realize forming a team the asynchronous interconnection between electrical network.
Wherein, electrical network of forming a team described in divides module and includes:
Module is chosen in target area, for choosing N number of history electricity consumption data target area more than predetermined threshold
Territory；Wherein, N is positive integer；
Form a team electrical network division unit, for the positional information according to N number of target area, and described electrical network knot
Structure information, is divided into the individual electrical network of forming a team of predetermined quantity by the electrical network of described power load center；Wherein, described
N number of target area is uniformly distributed in described predetermined quantity forms a team electrical network.
Wherein, the history electricity consumption in each city in described first acquisition module obtains described power load center
Data.
Wherein, the electrical network of described power load center is divided into two to form a team by electrical network division unit of forming a team described in
Electrical network；Wherein, each electrical network of forming a team is made up of looped network.
By above scheme, the flexible direct current of a kind of power load center that the embodiment of the present invention provides
Asynchronous Interconnection method and system back-to-back, including: in acquisition power load center, the history of regional is used
Electricity data；Obtain the electric network composition information of described power load center；According to described history electricity consumption data and
Described electric network composition information, is divided into the individual electrical network of forming a team of predetermined quantity by the electrical network of described power load center；
Individual for the described predetermined quantity each two in electrical network of forming a team being formed a team, it is the most defeated to set up flexible direct current between electrical network
Electricity system, to realize forming a team the asynchronous interconnection between electrical network；By building flexible direct current back-to-back by load
Central synchronous electrical network, is isolated into multiple synchronised grids, simplifies electric network composition, increases between transformer station flat
All electrical distance, reduces influencing each other between alternating current-direct current, can effectively solve load center (such as Pearl River Delta
Electrical network) that short circuit current exceeds standard, many direct currents influence each other is prominent and large area blackout risk is high asks
Topic.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that disclosed in the embodiment of the present invention, the flexible direct current of a kind of power load center is back-to-back asynchronous
Network method schematic flow sheet；
Fig. 2 is the open a kind of back-to-back Asynchronous Interconnection side of power load center flexible direct current of the embodiment of the present invention
Case schematic diagram；
Fig. 3 is that disclosed in the embodiment of the present invention, the flexible direct current of a kind of power load center is back-to-back asynchronous
Net system structure schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not making
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
The embodiment of the invention discloses a kind of flexible direct current back-to-back Asynchronous Interconnection method of power load center
And system, to solve short circuit current and exceed standard, many direct currents influence each other prominent and large area blackout wind
The problems such as danger is high.
Seeing Fig. 1, the flexible direct current of a kind of power load center that the embodiment of the present invention provides is the most different
Step networking method, including:
The history electricity consumption data of regional in S101, acquisition power load center；
Wherein, the history electricity consumption data of regional in described acquisition power load center, including:
Obtain the history electricity consumption data in described power load center each city interior.
Concrete, in the present embodiment during analysis of history electricity consumption data, can carry out according to the region divided
Analyze, it is also possible to be directly analyzed according to each city in power load center.
S102, obtain the electric network composition information of described power load center；
Concrete, history electricity consumption data and electric network composition information in the present embodiment can be by the sides of investigation
Formula obtains.
S103, according to described history electricity consumption data and described electric network composition information, by described electric load
The electrical network of the heart is divided into the individual electrical network of forming a team of predetermined quantity；
Wherein, according to described history electricity consumption data and described electric network composition information, by described electric load
The electrical network of the heart is divided into the individual electrical network of forming a team of predetermined quantity, including:
Choose N number of history electricity consumption data target area more than predetermined threshold；Wherein, N is positive integer；
According to the positional information of N number of target area, and described electric network composition information, by described electric load
The electrical network at center is divided into the individual electrical network of forming a team of predetermined quantity；Wherein, described N number of target area is described predetermined
It is uniformly distributed in the individual electrical network of forming a team of quantity.
The electrical network of described power load center is wherein divided into the individual electrical network of forming a team of predetermined quantity include:
The electrical network of described power load center is divided into two electrical networks of forming a team；Wherein, each form a team electrical network by
Looped network is constituted.
Concrete, divide when form a team electrical network in the present embodiment, can be former according to power load center
First electric network composition divides, when dividing, and can be by being divided in of trying one's best in area more for power consumption
Different forms a team in electrical network.
S104, each two in electrical network of being formed a team by described predetermined quantity are formed a team and are set up flexibility between electrical network directly
Flow back-to-back transmission system, to realize forming a team the asynchronous interconnection between electrical network.
In the present embodiment, based on the existing rack in Guangdong, Guangdong Power Grid is divided into two, east, west
Internal connection is formed a team electrical network closely, is made up of some looped networks in respectively forming a team, and two form a team between electrical network by soft
Directly realize asynchronous interconnection back-to-back.The method can utilize existing internal and external double-circular net to greatest extent, with less
Cost, at utmost solves the problem that electrical network exists
Concrete, see a kind of power load center flexible direct current that Fig. 2 provides for the present embodiment back-to-back
Asynchronous Interconnection scheme schematic diagram, special according to the distribution of Guangdong Power Grid load power and existing internal and external double-circular web frame
Point, back-to-back by building flexible direct current between Guangzhou and Dongguan, Guangzhou and Shenzhen etc., it is achieved Guangdong
The asynchronous interconnection of Pearl River Delta load center synchronised grids.After Asynchronous Interconnection, western group team knowledge Guangzhou,
Foshan City, Zhongshan city, Jiangmen city, Zhuhai City, Zhaoqing and western district of Guangdong, form a team and cover Huizhou in east
City, Dongguan City, Shenzhen, North Guangdong and east Guangdong Province.
The flexible direct current back-to-back Asynchronous Interconnection system provided the embodiment of the present invention below is introduced, under
The flexible direct current back-to-back Asynchronous Interconnection system that literary composition describes is back-to-back asynchronous with above-described flexible direct current
Net system can be cross-referenced.
Seeing Fig. 3, the flexible direct current of a kind of power load center that the embodiment of the present invention provides is the most different
Step networked system, including:
First acquisition module 100, the history electricity consumption number of regional in obtaining power load center
According to；
Second acquisition module 200, for obtaining the electric network composition information of described power load center；
Electrical network of forming a team divides module 300, for believing according to described history electricity consumption data and described electric network composition
Breath, is divided into the individual electrical network of forming a team of predetermined quantity by the electrical network of described power load center；
Set up module 400, for each two in electrical network that described predetermined quantity is formed a team form a team electrical network it
Between set up the back-to-back transmission system of flexible direct current, to realize forming a team the asynchronous interconnection between electrical network.
Based on technique scheme, described in form a team electrical network divide module 300 include:
Module is chosen in target area, for choosing N number of history electricity consumption data target area more than predetermined threshold
Territory；Wherein, N is positive integer；
Form a team electrical network division unit, for the positional information according to N number of target area, and described electrical network knot
Structure information, is divided into the individual electrical network of forming a team of predetermined quantity by the electrical network of described power load center；Wherein, described
N number of target area is uniformly distributed in described predetermined quantity forms a team electrical network.
Based on technique scheme, described first acquisition module 100 is each in obtaining described power load center
The history electricity consumption data in individual city.
Based on technique scheme, described in form a team the electrical network division unit electrical network by described power load center
It is divided into two electrical networks of forming a team；Wherein, each electrical network of forming a team is made up of looped network.
The flexible direct current back-to-back Asynchronous Interconnection method of a kind of power load center that the embodiment of the present invention provides
And system, including: the history electricity consumption data of regional in acquisition power load center；Obtain described electricity
The electric network composition information of power load center；According to described history electricity consumption data and described electric network composition information,
The electrical network of described power load center is divided into the individual electrical network of forming a team of predetermined quantity；By described predetermined quantity group
Each two in group's electrical network is formed a team and is set up the back-to-back transmission system of flexible direct current between electrical network, to realize forming a team
Asynchronous interconnection between electrical network；
Visible, the present invention has jumped out the current commonly used synchronised grids of power load center and has solved the normal of problem
Rule thinking, from the angle of change load center power network development technology path, leans against by building flexible direct current
The back of the body, by load center synchronised grids, is isolated into multiple synchronised grids, simplifies electric network composition, increase change
Between power station, average electrical distance, reduces influencing each other between alternating current-direct current, effectively solves Guangdong Power Grid short circuit
The problems such as prominent and large area blackout risk that electric current exceeds standard, many direct currents influence each other is high.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (8)
1. the flexible direct current of a power load center back-to-back Asynchronous Interconnection method, it is characterised in that bag
Include:
The history electricity consumption data of regional in acquisition power load center；
Obtain the electric network composition information of described power load center；
According to described history electricity consumption data and described electric network composition information, by the electricity of described power load center
Net is divided into the individual electrical network of forming a team of predetermined quantity；
The each two in electrical network of being formed a team by described predetermined quantity is formed a team and is set up flexible direct current between electrical network and lean against
Back of the body transmission system, to realize forming a team the asynchronous interconnection between electrical network.
Flexible direct current the most according to claim 1 back-to-back Asynchronous Interconnection method, it is characterised in that
According to described history electricity consumption data and described electric network composition information, the electrical network of described power load center is divided
Form a team electrical network for predetermined quantity, including:
Choose N number of history electricity consumption data target area more than predetermined threshold；Wherein, N is positive integer；
According to the positional information of N number of target area, and described electric network composition information, by described electric load
The electrical network at center is divided into the individual electrical network of forming a team of predetermined quantity；Wherein, described N number of target area is described predetermined
It is uniformly distributed in the individual electrical network of forming a team of quantity.
Flexible direct current the most according to claim 2 back-to-back Asynchronous Interconnection method, it is characterised in that
The history electricity consumption data of regional in described acquisition power load center, including:
Obtain the history electricity consumption data in described power load center each city interior.
4. according to the back-to-back Asynchronous Interconnection method of the flexible direct current described in any one in claim 1-3,
It is characterized in that, the electrical network of described power load center is divided into the individual electrical network of forming a team of predetermined quantity include:
The electrical network of described power load center is divided into two electrical networks of forming a team；Wherein, each form a team electrical network by
Looped network is constituted.
5. the flexible direct current of a power load center back-to-back Asynchronous Interconnection system, it is characterised in that
Including:
First acquisition module, the history electricity consumption data of regional in obtaining power load center；
Second acquisition module, for obtaining the electric network composition information of described power load center；
Electrical network of forming a team divides module, is used for according to described history electricity consumption data and described electric network composition information,
The electrical network of described power load center is divided into the individual electrical network of forming a team of predetermined quantity；
Set up module, form a team for each two in electrical network that described predetermined quantity is formed a team and build between electrical network
The vertical back-to-back transmission system of flexible direct current, to realize forming a team the asynchronous interconnection between electrical network.
Flexible direct current the most according to claim 5 back-to-back Asynchronous Interconnection system, it is characterised in that
Described electrical network of forming a team divides module and includes:
Module is chosen in target area, for choosing N number of history electricity consumption data target area more than predetermined threshold
Territory；Wherein, N is positive integer；
Form a team electrical network division unit, for the positional information according to N number of target area, and described electrical network knot
Structure information, is divided into the individual electrical network of forming a team of predetermined quantity by the electrical network of described power load center；Wherein, described
N number of target area is uniformly distributed in described predetermined quantity forms a team electrical network.
Flexible direct current the most according to claim 6 back-to-back Asynchronous Interconnection system, it is characterised in that
Described first acquisition module obtains the history electricity consumption data in described power load center each city interior.
8. according to the back-to-back Asynchronous Interconnection system of the flexible direct current described in any one in claim 5-7,
It is characterized in that,
The electrical network of described power load center is divided into two electrical networks of forming a team by described electrical network division unit of forming a team；
Wherein, each electrical network of forming a team is made up of looped network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610585833.8A CN106026075A (en) | 2016-07-22 | 2016-07-22 | Flexible DC back-to-back asynchronous networking method and system of power load center |
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| CN201610585833.8A CN106026075A (en) | 2016-07-22 | 2016-07-22 | Flexible DC back-to-back asynchronous networking method and system of power load center |
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Citations (2)
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| WO2015193199A1 (en) * | 2014-06-20 | 2015-12-23 | University College Dublin National University Of Ireland, Dublin | Method for controlling power distribution |
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2016
- 2016-07-22 CN CN201610585833.8A patent/CN106026075A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015193199A1 (en) * | 2014-06-20 | 2015-12-23 | University College Dublin National University Of Ireland, Dublin | Method for controlling power distribution |
| CN104217281A (en) * | 2014-08-14 | 2014-12-17 | 天津大学 | Power grid planning method oriented towards cluster planning of city |
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| 余欣梅等: "珠江三角洲地区电网发展战略研究", 《南方电网技术》 * |
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