CN103065040A - Computer construction method of medium-voltage distribution network power supply framework - Google Patents

Computer construction method of medium-voltage distribution network power supply framework Download PDF

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CN103065040A
CN103065040A CN2012105407617A CN201210540761A CN103065040A CN 103065040 A CN103065040 A CN 103065040A CN 2012105407617 A CN2012105407617 A CN 2012105407617A CN 201210540761 A CN201210540761 A CN 201210540761A CN 103065040 A CN103065040 A CN 103065040A
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power supply
transformer
transformer station
distribution network
voltage distribution
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CN103065040B (en
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吴涵
丘亮
陈彬
张功林
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd
State Grid Fujian Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd
State Grid Fujian Electric Power Co Ltd
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Abstract

The invention relates to a construction mode of a medium-voltage distribution network power supply framework, in particular to a computer construction method of the medium-voltage distribution network power supply framework. The medium-voltage distribution network power supply framework is constructed on the basis of a power supply model, the regional characteristic and the load characteristic of a transformer substation are sufficiently considered, and the medium-voltage distribution network power supply framework is developed from the wiring mode to the standardized power supply mode, is clear and standard on the basis of unified criterion and processing of a computer, accords with the landform characteristic of a region and improves reliability of a distribution network. The medium-voltage distribution network power supply framework further optimizes the integral power supply capacity of the distribution network, and achieves maximum utilization of main transformers and lines. In addition, the medium-voltage distribution network power supply framework constructed on the basis of the power supply model can achieve matching of the integral load supply capacity of the model and the power supply transfer capacity of lines in the model, enables an upper level power grid and a lower level power grid to be coordinated, and leads loads between all the main transformers and the lines in the medium-voltage distribution network power supply framework to be balanced as far as possible.

Description

The calculation mechanism construction method of middle voltage distribution networks construction for electricity
Technical field
The present invention relates to a kind of generation type of middle voltage distribution networks construction for electricity, particularly a kind of calculation mechanism construction method of middle voltage distribution networks construction for electricity.
Background technology
The supplying power allocation framework is medium voltage distribution network " muscles and bones ", and strong grid structure is that power grid security is reliable, the basis of high-quality operation.Yet, for a long time, because China region is extensive, with a varied topography, domestic research and practice to the medium voltage distribution network framework mainly concentrates on the Connection Mode aspect, Connection Mode is only extremely embodying structure and the communication relationship of pressing in some times between the feeder line in the part, can't embody in the area power grid electric power-feeding structure of transformer station under the different terrain and load density level conditions, concrete equipment configuration also can't reflect the refinement power supply index of this structure, caused whole Distributing network structure unreasonable, the line load unreasonable distribution; Connection Mode only can embody structure and the communication relationship between the circuit at the corresponding levels in addition, can't react the bulk supply ability of distribution system, and, Connection Mode is only powered with regard to self load and contact in design, the situation that does not relate to the collaborative power supply of multi-voltage grade, cause can't reaching good fit between middle voltage distribution networks and the high pressure distribution, partial load is overweight or kick the beam all and can cause tremendous influence to safety, the reliable power supply of electrical network.
Secondly, only rest on the line side for the evaluation of Connection Mode, can't reflect the characteristic for the electric model transformer substation side; And the distribution system evaluation index is to formulate according to the present situation distribution network mostly, and most index is only applicable to the evaluation of present situation network, such as distribution transforming without oiling rate, Plant in good condition situation, circuit model normal conditions etc.Existing appraisement system for Connection Mode and distribution system can't directly apply to the power supply evaluation of model.At last, traditional medium-Voltage Distribution network planning and design are because the more Connection Mode that closes note feeder lacks the extendability design to whole rack, and the rack construction is clear not, do not have unified standard yet, be unfavorable for the realization of Distribution Automation Technology in actual distribution system.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, and provide a kind of can be in conjunction with the calculation mechanism construction method of the middle voltage distribution networks construction for electricity of landform, features such as load distribution etc.
The present invention is achieved through the following channels:
The calculation mechanism construction method of middle voltage distribution networks construction for electricity, its main points are, comprise the steps:
Map system based on transformer station is provided, and it includes the cartographic information of required structure and the positional information of each transformer station;
The data analysis processing unit is provided, and it calculates longitude and latitude corresponding to all pixels on the cartographic information, sets up reference frame;
In reference frame, the website of all transformer stations in the power supply area of setting is carried out coordinate transform calculate, obtain all transformer station's coordinate datas;
Be set to loose point set in the planar graph according to coordinate data point of the transformer station of all in the power supply area in cartographic information of transformer station;
Lawson computing module and LOP local optimum computing module are provided, and Lawson computing module is carried out the Delaunay triangulation to the loose point set in the planar graph, obtains the initial triangulation network; LOP local optimum computing module is optimized computing to the initial triangulation network, obtains effective Delaunay triangulation network, and each node of the triangulation network represents a transformer station;
Effective Delaunay triangulation network is carried out the first time to be revised:
Carry out the transformer substation foundation information of storing in each transformer station in the power supply area and the electric system related, and extracting the Back ground Information of each transformer station, described Back ground Information includes rated capacity, power factor (PF) and the maximum load factor that allows of the theoretical maximum radius of electricity supply of transformer station, actual maximum radius of electricity supply, net capability, transforming plant main transformer number of units, transformer; Carry out following setting according to above-mentioned transformer substation foundation data:
Arrange and exist barrier to the factor of influence k of the maximum radius of electricity supply of transformer station in the power supply area 1:
Figure BDA00002585596700021
In the formula, S is the total area of barrier in transformer station's power supply area, and Rmax is the maximum radius of electricity supply of transformer station when only considering load distribution performance, i.e. theoretical maximum radius of electricity supply;
Factor of influence k to the maximum radius of electricity supply of transformer station is set when barrier passes through a certain transformer station power supply area in the power supply area 2:
Figure BDA00002585596700022
In the formula, θ 1The formed angle of power supply circle for the actual maximum radius of electricity supply formation of barrier and transformer station;
Calculate the maximum effectively radius of electricity supply R that transformer station considers barrier and load distribution performance D:
R D=k 1×k 2×Rmax
Make the following judgment processing according to the data analysis processing unit:
In the effective Delaunay triangulation network, if the actual range between two transformer stations is then deleted the line between these two transformer stations more than or equal to the maximum effectively radius of electricity supply sum of two transformer stations; Otherwise, keep the line between two transformer stations;
Effective Delaunay triangulation network is carried out the second time to be revised:
From map system, extract the pixel in river, and with the color data of this pixel as reference value,
Extract two transformer stations that line is arranged in the map system, calculate its line the color data of all pixels of process, if the color data of one of them above pixel is identical with reference value, then delete the line between this two transformer station, otherwise, keep the connection between two transformer stations;
Extract the elevation data computing module in the map system, it can be according to its sea level elevation of calculation of longitude ﹠ latitude of specified point;
Extract two transformer stations that line is arranged in the map system, obtain its line the longitude and latitude of all pixels of process; According to the elevation data computing module calculate line the sea level elevation of all pixels of process, if the sea level elevation of one of them above pixel surpasses the sea level elevation value of setting, then delete the line between this two transformer station, otherwise, the connection between two transformer stations kept;
The transformer station and the connection data thereof that obtain at last are combined in the cartographic information, for this setting power supply area is considered the practically medium voltage distribution network construction for electricity of characteristic of field and load characteristic.
Described map system based on transformer station can be existing GOOGLE map system, Baidu's map system etc., it can also be existing Geographic Information System based on GIS, it is a kind of map system that includes each transformer station's information, include concrete terrain information, such as specifying informations such as river, mountain range, sea level elevations.The Back ground Information of described transformer station is to build up or during planning and design in transformer station, the data of the relevant transformer station that just determines, and it is stored in the electric system, for scheduling, O﹠M, maintenance etc.Described barrier refers to the regional characteristics such as massif, river, lake, greenery patches, the zone that power consumption is few.
Lawson computing module and LOP local optimum computing module and Delaunay triangulation are all theoretical from Delaunay triangulation classical in the geometry, and it is used for a loose some set is split into inhomogeneous triangular mesh.
The setting power supply area that generates is at last considered in the medium voltage distribution network construction for electricity of practically characteristic of field and load characteristic, each transformer station or independent distribution, may be separately formed the point-like construction for electricity, or be chain and distribute, form the chain construction for electricity, or distribution triangular in shape, form the triangle construction for electricity, formed the blank for electric model.
Construction for electricity refers to for a certain power supply area, and one or many transformer stations are by the interconnected formed basic structure that can reflect the power supply rack of this power supply area load distribution performance and regional characteristic, embodiment be interconnecting relation between the transformer station.
The calculation mechanism construction method of middle voltage distribution networks construction for electricity of the present invention is based on for electric model and makes up, regional characteristic, the load characteristic of transformer station have been taken into full account, the medium voltage distribution network framework is developed into normalized powering mode by Connection Mode, form the construction for electricity of the topography and landform character of applying this area.And unified criterion and processing by computing machine, the transformation of the corresponding concrete power supply model construction of the framework of formation can form unified, clear, rational mid-voltage distribution network frame on the whole.Shorten the fault grid switching operation time in advance specified fault phase load transfer, realization, improving distribution network reliability provides possibility.Secondly, described power distribution network construction for electricity has been optimized the bulk supply ability of power distribution network by considering part throttle characteristics, regional characteristic, reaches the maximum using of main transformer and circuit.At last, medium voltage distribution network framework based on the power supply model construction, the power supply transfer ability of circuit coupling in can implementation model overall load service capability and the model, so that upper and lower level electrical network coordinates more, and realize that each main transformer, the load between each bar circuit in the rack reach balanced as much as possible.
Description of drawings
Figure 1 shows that the structural representation of Delaunay triangulation described in the most preferred embodiment of the present invention;
Below in conjunction with embodiment the present invention is further elaborated.
Embodiment
Most preferred embodiment:
The calculation mechanism construction method of middle voltage distribution networks construction for electricity comprises the steps:
1, generates the Delaunay triangulation network
Concrete steps and explanation:
(1) for making up the zone, at first obtains this regional GOOGLE map; Can call the related function of java drawing object Graphic for the place that needs in the map to draw, be finished by the software backstage.
(2) calculate longitude and latitude corresponding to all pixels on the GOOGLE map, set up reference frame.
(3) in the reference frame of setting up, the website of all transformer stations in this power supply area is carried out coordinate setting, and abstract be loose point set in the planar graph.
(4) call Lawson computing module, use the Lawson algorithm, by software programming, planar point set is carried out the Delaunay triangulation, obtain the initial triangulation network; And call LOP local optimum computing module, and use the LOP algorithm to be optimized, generate the effective Delaunay triangulation network.LOP Local Optimization Algorithm: the quadrilateral that two triangles with common edge form is judged, if wherein any one leg-of-mutton circumscribed circle comprises three summit of another triangle except public vertex, then exchanged common edge.
2, the effective Delaunay triangulation network being carried out the first time revises
Concrete steps and explanation:
(1) at first according to this regional load distribution performance and regional characteristic, asks for the maximum effectively radius of electricity supply R of each transformer station after revising D: (seeing that specifically summary of the invention partly illustrates)
R D = k 1 × k 2 × R max = S π R max 2 + 1 × π ( 1 - θ 1 360 ) π + 1 2 sin θ 1 × R max
Wherein
Figure BDA00002585596700052
In the formula, N is the main transformer number of units in the transformer station, and Ti is the rated capacity (MVA) of transformer i;
Figure BDA00002585596700053
Power factor (PF) for transformer i; η MaxiMaximum permission load factor for transformer i; D is the average load density behind the consideration simultaneity factor.
(2) then according to following criterion the initial Delaunay triangulation network being carried out the first time revises:
If the actual range between two transformer stations then will be deleted the line between these two transformer stations more than or equal to the maximum effectively radius of electricity supply sum of two transformer stations; If the actual range between two transformer stations then will keep the line between these two transformer stations less than the maximum effectively radius of electricity supply sum of two transformer stations.
3, the Delaunay triangulation network being carried out the second time revises:
According to criterion be: the unsuitable transregional power supply of 10kV middle-voltage network, radius of electricity supply is unsuitable long;
The 10kV middle-voltage network should not stride river, cross a river, stride the mountain power supply (annotate: if between two transformer stations barrier is arranged, but the total length of walking around circuit behind the barrier is less than or equal to 1.2 o'clock of air line distance between two transformer stations, can not will line deletion).
According to the topography and landform character of planning region reality, as distinguish the layout etc. in interior hillside, river, in conjunction with criterion the Delaunay triangulation network is carried out the second time and revise, with the line deletion that does not meet between the transformer station of criterion.
In the GOOGLE map, as follows to the judgement in river, mountains and rivers:
(1) river:
The main cause that the river can judge by map be because: the color of river mark is very special blueness in Google Maps, just can determine whether the river according to the color of the pixel above the intercepting map according to this characteristic, concrete grammar is as follows:
Suppose two A of transformer station and B, get 2 lines of AB all pixels of process, and the color of these pixels judged, if when the color of pixel that ought be wherein is the color of river point, just determine that two transformer stations of AB are cross a river stream.
(2) mountains and rivers:
Judgement to mountains and rivers will be carried out according to height above sea level, just have a function G etElevation () in the api interface of Google Maps, can obtain specifying the height above sea level of longitude and latitude point from the rreturn value of this function.The realization concrete grammar is as follows: suppose two A of transformer station and B, get 2 lines of AB all pixels of process, and calculation of longitude ﹠ latitude corresponding to these pixels out, obtain the height above sea level of each longitude and latitude by above-mentioned GetElevation () function, thereby learn the continuous altitude change above the AB line, when the variation of height above sea level surpasses the value of an appointment, just think that the AB line strides the mountain, so just can determine that an individual transformer station of AB company strides mountains and rivers.
4, generate construction for electricity
Behind above modified twice, namely generated the medium voltage distribution network construction for electricity after this planning power supply area is considered actual conditions; By the identification of software hind computation, provide this regional construction for electricity classification, as: point-like construction for electricity, chain construction for electricity, triangle construction for electricity.
It is same as the prior art that the present invention does not state part.

Claims (1)

1. the calculation mechanism construction method of middle voltage distribution networks construction for electricity is characterized in that, comprises the steps:
Map system based on transformer station is provided, and it includes the cartographic information of required structure and the positional information of each transformer station;
The data analysis processing unit is provided, and it calculates longitude and latitude corresponding to all pixels on the cartographic information, sets up reference frame;
In reference frame, the website of all transformer stations in the power supply area of setting is carried out coordinate transform calculate, obtain all transformer station's coordinate datas;
Be set to loose point set in the planar graph according to coordinate data point of the transformer station of all in the power supply area in cartographic information of transformer station;
Lawson computing module and LOP local optimum computing module are provided, and Lawson computing module is carried out the Delaunay triangulation to the loose point set in the planar graph, obtains the initial triangulation network; LOP local optimum computing module is optimized computing to the initial triangulation network, obtains effective Delaunay triangulation network, and each node of the triangulation network represents a transformer station;
Effective Delaunay triangulation network is carried out the first time to be revised:
Carry out the transformer substation foundation information of storing in each transformer station in the power supply area and the electric system related, and extracting the Back ground Information of each transformer station, described Back ground Information includes rated capacity, power factor (PF) and the maximum load factor that allows of the theoretical maximum radius of electricity supply of transformer station, actual maximum radius of electricity supply, net capability, transforming plant main transformer number of units, transformer; Carry out following setting according to above-mentioned transformer substation foundation data:
Arrange and exist barrier to the factor of influence k of the maximum radius of electricity supply of transformer station in the power supply area 1:
Figure DEST_PATH_FDA00002867834700011
In the formula, S is the total area of barrier in transformer station's power supply area, and Rmax is the maximum radius of electricity supply of transformer station when only considering load distribution performance, i.e. theoretical maximum radius of electricity supply;
Factor of influence k to the maximum radius of electricity supply of transformer station is set when barrier passes through a certain transformer station power supply area in the power supply area 2:
In the formula, θ 1The formed angle of power supply circle for the actual maximum radius of electricity supply formation of barrier and transformer station;
Calculate the maximum effectively radius of electricity supply R that transformer station considers barrier and load distribution performance D:
R D=k 1×k 2×Rmax
Make the following judgment processing according to the data analysis processing unit:
In the effective Delaunay triangulation network, if the actual range between two transformer stations is then deleted the line between these two transformer stations more than or equal to the maximum effectively radius of electricity supply sum of two transformer stations; Otherwise, keep the line between two transformer stations;
Effective Delaunay triangulation network is carried out the second time to be revised:
From map system, extract the pixel in river, and with the color data of this pixel as reference value,
Extract two transformer stations that line is arranged in the map system, calculate its line the color data of all pixels of process, if the color data of one of them above pixel is identical with reference value, then delete the line between this two transformer station, otherwise, keep the connection between two transformer stations;
Extract the elevation data computing module in the map system, it can be according to its sea level elevation of calculation of longitude ﹠ latitude of specified point;
Extract two transformer stations that line is arranged in the map system, obtain its line the longitude and latitude of all pixels of process; According to the elevation data computing module calculate line the sea level elevation of all pixels of process, if the sea level elevation of one of them above pixel surpasses the sea level elevation value of setting, then delete the line between this two transformer station, otherwise, the connection between two transformer stations kept;
The transformer station and the connection data thereof that obtain at last are combined in the cartographic information, for this setting power supply area is considered the practically medium voltage distribution network construction for electricity of characteristic of field and load characteristic.
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CN103440398B (en) * 2013-07-10 2016-09-28 武汉大学 A kind of grid branch importance appraisal procedure based on pattern recognition
CN103440398A (en) * 2013-07-10 2013-12-11 武汉大学 Pattern recognition-based power grid branch importance estimation method
CN104123679A (en) * 2014-07-11 2014-10-29 广东电网公司电网规划研究中心 Coastal area wind prevention security power grid frame construction method based on graph theory algorithm
CN104123679B (en) * 2014-07-11 2015-05-13 广东电网公司电网规划研究中心 Coastal area wind prevention security power grid frame construction method based on graph theory algorithm
CN104331847A (en) * 2014-11-18 2015-02-04 国家电网公司 Power supply zone partitioning method by use of Delaunay triangulation
CN104537580A (en) * 2015-01-27 2015-04-22 四川大学 Method for constructing power distribution network frame based on K-means cluster
CN104537580B (en) * 2015-01-27 2018-04-17 四川大学 The construction method of distribution network structure based on K means clusters
CN106709815A (en) * 2015-08-10 2017-05-24 国网上海市电力公司 Method of reading medium-voltage distribution network grid structure data in PMS system
CN108701273A (en) * 2016-01-22 2018-10-23 比亚里网络有限公司 Method and system for designing distribution network
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CN106529758A (en) * 2016-09-13 2017-03-22 国网山东省电力公司青岛供电公司 Reasonableness determining method and device for power supply area of distribution transformers
CN108549677B (en) * 2018-03-30 2021-08-31 国网甘肃省电力公司 Method for depicting power supply service range of public transformer area of general distribution network
CN108549677A (en) * 2018-03-30 2018-09-18 国网甘肃省电力公司 A kind of general distribution public affairs change taiwan area electric service range depicting method
CN110008573A (en) * 2019-03-30 2019-07-12 广州锐敏信息科技有限公司 The calculation and analysis methods and system of substation's supply district are generated in a kind of region

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