CN109861215A - A kind of sub-area division method based on multi-line power transmission betweenness - Google Patents

A kind of sub-area division method based on multi-line power transmission betweenness Download PDF

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CN109861215A
CN109861215A CN201910154861.8A CN201910154861A CN109861215A CN 109861215 A CN109861215 A CN 109861215A CN 201910154861 A CN201910154861 A CN 201910154861A CN 109861215 A CN109861215 A CN 109861215A
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transmission
betweenness
route
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area division
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朱丽萍
刘文颖
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North China Electric Power University
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Abstract

The invention discloses a kind of sub-area division methods based on multi-line power transmission betweenness, belong to the topological subregion field of complex network, comprising: according to the topology controlment of this area power grid, calculate the node admittance matrix of entire power grid；Calculate the power transmission distribution factor of every route；Calculate the load factor of every route；Calculate the transmission of electricity betweenness of transmission line；It according to the transmission of electricity betweenness of route, sorts according to the size of transmission line multi-line power transmission betweenness, using the GN algorithm in heuristic network clustering algorithm, by sub-area division at the critical transmissions line of transmission of electricity betweenness inflection point.A kind of sub-area division method based on multi-line power transmission betweenness of the invention alleviates the challenge that source lotus operation constraint is mutually restricted, limited each other with channel constraint existing for traditional geographical zone.

Description

A kind of sub-area division method based on multi-line power transmission betweenness
Technical field
The invention belongs to sub-area division technical field more particularly to a kind of sub-area division sides based on multi-line power transmission betweenness Method.
Background technique
As power grid scale constantly expands, the complexity of dispatching of power netwoks and calculating is higher and higher, in this context, will be big Power grid carry out rationalization partition, using each subregion be research object be adjusted optimization be one kind simplify, sufficiently excavation subregion in The effective way of source lotus adjusting potentiality.China is had been proven that with the six big regional power grids that layering and zoning principle grows up to be passed through Appropriate exchange capacity networking can play completely including peak regulation, avoid the peak hour, the benefits such as two things diametrically opposed to each other.Therefore, sub-area division side is studied Method makes full use of limited power balancing electricity related to transfer, has theoretical and practical values.
In recent years, it is very important to recognize that topological structure has the traffic control of power grid by more and more experts and scholars It influences.But mostly according to geographic orientation, simple foundation geographical location district grid is easy to appear submitting channel to be had traditional subregion Thermostabilization constrains and is forced the phenomenon that rationing the power supply.In sending end power grid, may restrict electricity sends consumption outside.
Summary of the invention
The technical problems to be solved by the present invention are: proposing a kind of sub-area division method based on multi-line power transmission betweenness, press The transmission of electricity betweenness of route sorts sub-area division, farthest distributes area's interior power, load rationally.Traditional geography is effectively relieved The challenge that the operation of source lotus existing for subregion constraint is mutually restricted, limited each other with channel constraint.
In order to solve the above technical problems, the technical scheme is that
A kind of sub-area division method based on transmission of electricity betweenness, which is characterized in that the sub-area division method includes following step It is rapid:
S1: according to the topology controlment of this area power grid, the power transmission distribution factor of every route is calculated；
S2: on the basis of step S1, consider the route thermostabilization limit, calculate the transmission of electricity betweenness of transmission line；
S3: on the basis of step S2, sorting according to the size of transmission line multi-line power transmission betweenness, poly- using heuristic network GN algorithm in class algorithm, by sub-area division at the critical transmissions line of transmission of electricity betweenness inflection point.
Preferably, the S1 the following steps are included:
S101: according to the reactance of every route, this power grid is calculated using software for calculation MATLAB by controllers such as computers Node reactance matrix；
S102: on the basis of step S101, node reactance relevant to this route and line reactance is chosen, brings definition into Formula obtains power transmission distribution factor.
Preferably, the S2 the following steps are included:
S201: Load flow calculation is carried out using simulation software PSASP by controllers such as computers, is obtained under a certain operating status The transimission power of every route；
S202: the thermostabilization power limit of every route is obtained according to " conductor and electric appliance selection designing technique provide "；
S203: on the basis of step S201, S202, the load factor of every route is calculated；
S204: it on the basis of step S102, S203, brings definition into and obtains the transmission of electricity betweenness of every route.
Preferably, the S3 the following steps are included:
S301: on the basis of step S203, the maximum route of this grid power transmission betweenness instantly is removed；
S302: check whether that new subregion occur is transferred to step S2 if not occurring again；If there is new subregion Continue S303；
S303: judging whether subregion number reaches preset value, if having reached, terminates subregion；If it is not up to, then It is secondary to be transferred to step S2.
By adopting the above-described technical solution, the beneficial effects of the present invention are:
Sub-area division method based on multi-line power transmission betweenness of the invention, by critical transmissions by sub-area division, i.e., Route is successively sequenced from high to low from transmission of electricity betweenness, then successively removes the new subregion of ingredient one by one, it is preparatory until reaching Until the number of partitions of setting.The scheduling problem of bulk power grid is decomposed into the source lotus coordinated operation problem of subregion minor scale power net, emphasis is examined Consider by stages line transmission stability limitation, and the endogenous lotus Collaborative Control of subregion influenced by line transmission limit it is small, can be maximum Distribute area's interior power, load in degree rationally.To sum up, alleviate source lotus operation constraint existing for traditional geographical zone to constrain with channel The challenge mutually restrict, limited each other.
Detailed description of the invention
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Fig. 1 is a kind of flow chart of the sub-area division method based on multi-line power transmission betweenness of the present invention；
Fig. 2 is the Gansu for having a variety of source lotuses such as wind-powered electricity generation, water power, thermoelectricity, high energy load described in the embodiment of the present invention concurrently West of a river power grid schematic diagram；
Fig. 3 is the transmission of electricity betweenness ascending sort curve graph of Hexi Region of Gansu transmission line of electricity described in the embodiment of the present invention；
Fig. 4 is Hexi Region of Gansu division result schematic diagram described in the embodiment of the present invention.
Specific embodiment
In order to have a clear understanding of technical solution of the present invention, its detailed structure will be set forth in the description that follows.Obviously, originally The specific execution of inventive embodiments is simultaneously insufficient to be limited to the specific details that those skilled in the art is familiar with.Preferred reality of the invention It applies example to be described in detail as follows, in addition to these embodiments of detailed description, can also have other embodiments.
The present invention is described in further details with reference to the accompanying drawings and examples.
Fig. 1 is a kind of flow chart of the sub-area division method based on multi-line power transmission betweenness of the present invention.In Fig. 1, the present invention is mentioned A kind of sub-area division method based on multi-line power transmission betweenness supplied, comprising the following steps:
S1: according to the topology controlment of this area power grid, the power transmission distribution factor of every route is calculated；
S2: on the basis of step S1, considering the route thermostabilization limit, the betweenness definition that patent proposes according to the present invention, Calculate the transmission of electricity betweenness of transmission line；
S3: on the basis of step S2, using the GN algorithm in heuristic network clustering algorithm, according to the big of transmission of electricity betweenness Small sequence subregion realizes that, by sub-area division at critical transmissions line, critical transmissions line is the maximum transmission line of betweenness of transmitting electricity, i.e., Route is successively sequenced from high to low from transmission of electricity betweenness, then successively removes the new subregion of ingredient one by one, it is preparatory until reaching Until the number of partitions of setting.Wherein, GN algorithm is a kind of community structure discovery algorithm of coagulation type.The algorithm is according to society in network Inside area between high cohesion, community the characteristics of low cohesion, intercommunal side is gradually removed, the community for obtaining opposite cohesion is tied Structure.Position of the algorithm when the concept of betweenness is to detect, certain while while betweenness be defined as on network between all vertex most Short path passes through the number on the side.By definition it is found that if a line connection community Liang Ge, between the two corporations' nodes Shortest path will be most by the number on the side, corresponding side betweenness is maximum.If deleting the side, Liang Ge corporations are just It can separate.GN calculation is just namely based on the shortest path that this thought calculates current network repeatedly, calculates the side betweenness of each edge, deletes The maximum side of flash trimming betweenness.Finally under certain condition, algorithm stops, and the community structure of network can be obtained.
The S1 the following steps are included:
S101: according to the reactance of every route, the node admittance for being easy to calculate is generated using software for calculation MATLAB first Then matrix inverts node admittance matrix to obtain nodal impedance matrix；
S102: on the basis of step S101, node electricity relevant to this route l (two end nodes are respectively m, n) is chosen Anti- and line reactance, brings formula defined below (1) into:
In formula (1), xlFor the reactance of branch l, Xmi、XniFor corresponding element in node reactance matrix, Gl-iIndicate that power passes Defeated distribution factor.
Wherein, node admittance matrix is exactly to indicate port current (dependent variable) with port voltage (independent variable) in Microwave Net Parameter matrix.
The S2 the following steps are included:
S201: the transmission function of every route under a certain operating status is obtained using Based on Power System Analysis Software Package PSASP Rate Pl；
S202: it according to the model of every route, searches " conductor and electric appliance selection designing technique regulation " and obtains every route Thermostabilization power limit Pl,max；
S203: on the basis of step S201, S202, the load factor of every route is calculated by formula defined below (2) ρl:
S204: it on the basis of step S102, S203, brings formula defined below (3) into and obtains the transmission of electricity betweenness of every route Bl:
The S3 the following steps are included:
S301: on the basis of step S203, the transmission of electricity betweenness of transmission lines of electricity all in this power grid being ranked up, and is removed Instantly the maximum route of this grid power transmission betweenness is separated into new subregion；
S302: checking whether new subregion occur, if not occurring, because having had changed the topological structure of network, need again into Row Load flow calculation need to be transferred to step S2 again；If having there is new subregion, continue S303；
S303: prior specified partition number N is the number for utmostly meeting computational accuracy, is terminated in this, as subregion Index；Judge whether subregion number reaches preset value, if having reached, terminates subregion；If not up to, being transferred to step again Rapid S2, until subregion terminates.
Embodiment:
Fig. 2 is the Gansu for having a variety of source lotuses such as wind-powered electricity generation, water power, thermoelectricity, high energy load described in the embodiment of the present invention concurrently West of a river power grid schematic diagram.Fig. 3 is that the transmission of electricity betweenness ascending sort of Hexi Region of Gansu transmission line of electricity described in the embodiment of the present invention is bent Line chart.Fig. 4 is Hexi Region of Gansu division result schematic diagram described in the embodiment of the present invention.The present embodiment uses Gansu Province 2018 Nian Dong great mode operation data is analyzed, a kind of sub-area division method packet based on multi-line power transmission betweenness provided by the invention It includes:
S1: the topology controlment of analysis Hexi Corridor power grid only considers 330kV and the above voltage to simplify the calculation The node and route of grade include transmission node 36,76, route, thermal power plant 8, wind power plant 23, high energy load 6 Place, west of a river power grid schematic diagram are as shown in Figure 2.Table 1 is the power transmission distribution factor of every route；
The power transmission distribution factor of the every route of table 1
Circuit number Gl-i Circuit number Gl-i Circuit number Gl-i Circuit number Gl-i
AC721239 0.039468 AC721026 0.01961 AC721173 0.31824 AC701223 0.289879
AC721240 0.039293 AC721023 0.032695 AC721027 0.555133 AC701228 0.192211
AC721137 0.143095 AC721024 0.032695 AC721028 0.546893 AC701221 0.192356
AC721138 0.125305 AC721164 0.145303 AC721245 0.077801 AC721217 0.082124
AC721121 0.084964 AC721165 0.152462 AC721246 0.029839 AC721218 0.083272
AC721122 0.079331 AC721253 0.221121 AC721125 0.133925 AC721219 0.082198
AC721257 0.111925 AC721254 0.210474 AC721126 0.133925 AC721180 0.290755
AC721258 0.118414 AC721251 0.286551 AC721021 0.498558 AC721181 0.288258
AC721255 0.175073 AC721252 0.276382 AC721113 0.247166 AC721279 0.292892
AC721256 0.178955 AC721098 0.228129 AC721163 0.254275 AC701218 0.688348
AC701206 0.214614 AC721099 0.246942 AC721220 1.254275 AC701009 0.465226
AC701207 0.214459 AC721334 0.002405 AC721222 0.817696 AC701010 0.465047
AC721275 1.433157 AC721174 0.42837 AC721223 0.736374 AC701015 0.266867
AC721276 1.426358 AC721175 0.451875 AC721125 0.133925 AC701016 0.266599
AC721087 2.000000 AC721277 0.426352 AC721126 0.133925 AC701017 0.289523
AC721086 1.000000 AC721278 0.427253 AC701225 0.164746 AC701018 0.299381
AC721168 0.105021 AC721247 0.023884 AC701226 0.16389 AC701005 1.000000
AC721169 0.107424 AC721248 0.023896 AC701227 0.161789 AC721178 1.00294
AC721025 0.01961 AC721172 0.316656 AC701222 0.289287 AC721179 1.296864
S2: the transimission power of every route under a certain operating status is obtained using Based on Power System Analysis Software Package PSASP； According to the model of every route, searches " conductor and electric appliance selection designing technique provide " and obtain the thermostabilization limit function of every route Rate；The load factor of every route of Hexi Corridor power grid is finally calculated, as shown in table 2:
The load factor of the every route of table 2
Circuit number ρl Circuit number ρl Circuit number ρl Circuit number ρl
AC721239 0.1305 AC721026 0.0773 AC721173 0.4738 AC701223 0.0758
AC721240 0.13025 AC721023 0.2561 AC721027 0.1352 AC701228 0.2705
AC721137 0.6396 AC721024 0.2561 AC721028 0.1332 AC701221 0.2704
AC721138 0.56191 AC721164 0.3439 AC721245 0.7721 AC721217 0.2188
AC721121 0.7920 AC721165 0.3616 AC721246 0.2988 AC721218 0.2222
AC721122 0.7395 AC721253 0.3343 AC721125 0.2490 AC721219 0.2188
AC721257 0.5585 AC721254 0.3190 AC721126 0.3002 AC721180 0.1053
AC721258 0.5905 AC721251 0.50525 AC721021 0.2925 AC721181 0.1734
AC721255 0.4935 AC721252 0.48775 AC721113 0.1118 AC721279 0.1266
AC721256 0.5045 AC721098 0.4504 AC721163 0.0771 AC701218 0.0438
AC701206 0.39145 AC721099 0.4869 AC721220 0.3274 AC701009 0.13675
AC701207 0.391225 AC721334 0.0116 AC721222 0.5205 AC701010 0.136725
AC721275 0.9407 AC721174 0.06425 AC721223 0.4631 AC701015 0.151875
AC721276 0.9363 AC721175 0.06675 AC721125 0.2490 AC701016 0.1518
AC721087 0.99475 AC721277 0.0001 AC721126 0.3002 AC701017 0.1914
AC721086 0.128 AC721278 0.0001 AC701225 0.2530 AC701018 0.1978
AC721168 0.46275 AC721247 0.0995 AC701226 0.2519 AC701005 0.12305
AC721169 0.4736 AC721248 0.0996 AC701227 0.248525 AC721178 0.0540
AC721025 0.0773 AC721172 0.4709 AC701222 0.07565 AC721179 0.0626
After obtaining the power transmission distribution factor and load factor of every route, transmission of electricity of the product of the two as route is calculated Betweenness obtains the transmission of electricity betweenness of every route, as shown in table 3:
The transmission of electricity betweenness of the every route of table 3
S3: on the basis of step S2, the transmission of electricity betweenness of all transmission lines of electricity of west of a river power grid is ranked up, Fig. 3 is obtained Shown in Hexi prefecture transmit electricity betweenness ascending order alignment curve.It can be seen from the figure that transmission of electricity betweenness is there are an apparent inflection point, Demonstrate the transmission line for existing really in power grid and having key effect to system operation and power transmission.Inflection point means to have corresponding The betweenness of transmission line is big, and the definition biggish route of betweenness is critical circuits.Using transmission of electricity betweenness as the calculating of GN partitioning algorithm Foundation from high to low successively sequences route from transmission of electricity betweenness using obtaining 4 subregions as the ending-criterion of algorithm, then successively The new subregion of ingredient is removed one by one, until reaching preset four numbers of partitions.Obtain the west of a river as shown in Figure 4 Area power grid partition scheme.The sum of transmission of electricity betweenness according to section transmission line carries out the sequence of significance level to each subregion, and right Section is constituted and the endogenous lotus distribution situation of subregion is described, as shown in table 4.
4 Hexi prefecture subregion section of table and description
As can be seen from Table 4, the subregion more than section number of, lines and the section of wind power plant concentration zones transmission of electricity betweenness are larger.With area This subregion trend is represented outer institute's connecting lines quantity heavy, big with the Power Exchange amount outside area more, have to the normal operation of entire power grid Great influence, therefore become most important section in power grid；The uncertainty of wind power output leads to route heavy duty or overload Key factor, therefore the transmission line section of wind power plant concentration zones is the object for needing to pay close attention to.It can be seen that the subregion of this paper Method can be realized preferably by west of a river sub-area division at key sections, be the research of the endogenous lotus coordinated scheduling operational mode in area It lays the foundation.
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, and those of ordinary skill in the art still can be to this hair Bright specific embodiment is modified or replaced equivalently, these without departing from spirit and scope of the invention any modification or Equivalent replacement is being applied within pending claims.

Claims (4)

1. it is a kind of based on transmission of electricity betweenness sub-area division method, which is characterized in that the sub-area division method the following steps are included:
S1: according to the topology controlment of this area power grid, the power transmission distribution factor of every route is calculated；
S2: on the basis of step S1, consider the route thermostabilization limit, calculate the transmission of electricity betweenness of transmission line；
S3: it on the basis of step S2, sorts according to the size of transmission line multi-line power transmission betweenness, is calculated using heuristic network clustering GN algorithm in method, by sub-area division at the critical transmissions line of transmission of electricity betweenness inflection point.
2. a kind of sub-area division method based on transmission of electricity betweenness according to claim 1, which is characterized in that the S1 includes Following steps:
S101: according to the reactance of every route, the node reactance matrix of this power grid is calculated using software for calculation MATLAB；
S102: on the basis of step S101, node reactance relevant to this route l and line reactance is chosen, brings definition into:
Obtain power transmission distribution factor, wherein m and n is respectively two end nodes of route l, xlFor the reactance of branch l, Xmi、Xni For corresponding element in node reactance matrix, Gl-iIndicate power transmission distribution factor.
3. a kind of sub-area division method based on transmission of electricity betweenness according to claim 2, which is characterized in that the S2 includes Following steps:
S201: Load flow calculation is carried out using simulation software PSASP, obtains the transimission power P of every route under a certain operating statusl；
S202: the thermostabilization power limit P of every route is obtained according to " conductor and electric appliance selection designing technique provide "l,max；
S203: on the basis of step S201, S202, pass through definition:
Calculate the load factor ρ of every routel；
S204: on the basis of step S102, S203, definition is brought into:
Obtain the transmission of electricity betweenness B of every routel。
4. a kind of sub-area division method based on transmission of electricity betweenness according to claim 3, which is characterized in that the S3 includes Following steps:
S301: on the basis of step S203, the maximum route of this grid power transmission betweenness instantly is removed, new subregion is become；
S302: check whether that new subregion occur is transferred to step S2 if not occurring again；Continue if there is new subregion S303；
S303: judging whether subregion number reaches preset value, if having reached, terminates subregion；If not up to, turning again Enter step S2.
CN201910154861.8A 2019-03-01 2019-03-01 A kind of sub-area division method based on multi-line power transmission betweenness Pending CN109861215A (en)

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Application publication date: 20190607