CN105243205A - Check method for suspicious breakpoint in power grid model - Google Patents
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- CN105243205A CN105243205A CN201510627686.1A CN201510627686A CN105243205A CN 105243205 A CN105243205 A CN 105243205A CN 201510627686 A CN201510627686 A CN 201510627686A CN 105243205 A CN105243205 A CN 105243205A
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Abstract
The invention provides a check method for a suspicious breakpoint in a power grid model. The method mainly comprises: sorting substation center coordinates; by using a dichotomy, finding out the substation center coordinates close to a power line endpoint; and according to optimized two-point overlap criteria, determining whether the endpoint is on the circumference of a substation, thereby obtaining a result whether the line endpoint is a breakpoint. The method can identify all suspicious breakpoints in the grid, has an error positioning function, and can timely correct errors, ensure the correctness of a system model, effectively prevent incorrect setting accidents, guarantee the safety operation of the grid and play an important role in ensuring and improving economic benefits for power enterprises.
Description
Technical field
The present invention relates to the technical field of power network modeling, particularly relate to the method for calibration of suspicious breakpoint in a kind of electric network model.
Background technology
In order to ensure the safe and stable operation of electric system, sufficient understanding must be had to the physical features of electric system and running status.But owing to carrying out costing dearly of large scale experiment in electric system, or the difficulty that observation time is oversize or System response time is very short and measure, a lot of field experiment all cannot realize, and therefore people adopt Computer Simulation to replace most field experiment more and more widely.Simulation calculation plays key player in Power System Analysis, and it makes the observation ability of people be extended, and thinking, simulation and computing power are strengthened, and has very important impetus to the development of electric system subject.
How rapidly and efficiently setting up an electric network model accurately and reliably, is the top priority that all power system calculation software faces.In simple terms, power network modeling is exactly the process of the annexation of each component parameters and each element in input electrical network, for other computing module provides raw data.Wherein, the annexation of each element is also referred to as topological relation.Institute's established model correctness is a vital problem, only under the prerequisite that electric network model is correct, the correctness of various simulation result could be ensured, otherwise will source mistake rise step by step wrong, cause the serious consequences such as tuning error, bring serious potential safety hazard to power system calculation software and Operation of Electric Systems.
Early stage modeling method falls behind, mostly based on DOS system development, friendly man-machine interface cannot be provided, the form input electrical network raw data of data file can only be adopted, process is very loaded down with trivial details, require higher to user of service, the very flexible of application, especially cannot modify easily during electric network composition change.Through development in recent years, power network modeling achieves significant progress, popular is graphical modeling at present, based on Windows operating system design, have employed current advanced and mature computer software visualization technique, every class component is all used pel symbology, drags related elements during modeling to the position be applicable to, double-click icon and occur component parameters input forms; For topological relation, some programs by manually inputting annexation, some programs by identifying after each element extreme coordinates, by backstage automatic analysis.The electric network model that this graphic based is set up is that power specialty provides a powerful management of computing workbench, greatly can improve the gentle management level of Automated water.
Although modeling technique experienced by the unremitting effort of several generations professional, achieving great achievement, still there is following defect in current domestic popular " graphical modeling technology ":
All elements all will manually be set up one by one, and it is right on earth for the electric network model set up, current electric system self does not rationally effectively verify means, and the staff of electric system can only lean on the traditional means of " two calculating at a glance " to confirm model correctness.First, this verification to model is checked on by naked eyes, is gone with the flow, and staff generally lacks verification experience; Moreover passively to carry out, only just pinpoint the problems when program cannot normally calculate, go to search reason.Visible this manually passive verification way is unscientific, breakneck, has the possibility breaking out security incident because of model errors at any time.Particularly under, the objective prerequisite such as model area is large in large scale at current electrical network, once electric network model is made mistakes, debugging is just like looking for a needle in a haystack, and the debugging time can not expect, is difficult in a short time deal with problems, and the equipment that has a strong impact on is gone into operation on schedule.
Summary of the invention
The present invention is directed to the defect that prior art exists, propose the method for calibration of suspect endpoint in a kind of electric network model, with automatic Verification breakpoint, find out the mistake that may exist, guarantee that built electric network model is entirely true.
In order to solve the problems of the technologies described above, technical scheme of the present invention is as follows:
A method of calibration for suspicious breakpoint in electric network model, comprises the following steps:
Obtain the coordinate (Xi, Yi) in the center of circle of each transformer station in electric network model, i=1,2,3 ... m, m are the sum of transformer station, and the coordinate (Xj, Yj) of each bar power circuit end points, j=1,2,3 ... n, n are the sum of power circuit;
Successively for the end points (Xj of each power circuit, Yj), find out the transformer station central coordinate of circle (Xi simultaneously meeting inequality R – D<abs (Xi-Xj) < R+D and inequality R – D<abs (Yi-Yj) < R+D, Yi), wherein D represents the threshold value of distance between two points preset in electric network model, and abs represents and asks absolute value;
Utilize formula d=abs (Xi-Xj)+abs (Yi-Yj) computing electric line end points (Xj, Yj) with the corresponding transformer station circumferential coordinates (Xi meeting described two inequality, Yi) distance d, wherein abs represents and asks absolute value;
By described distance d compared with transformer station radius R, if d≤R, then judge that described power circuit end points is connected to transformer station circumferentially, if d > is R, then judge the separated of described power circuit end points and transformer station.
The method of calibration of electric system simulation software for calculation provided by the invention, the suspicious breakpoint of the whole network can be identified, possesses location of mistake function, and by optimizing the account form of distance between two points, greatly reduce the operand in verification, can error correction in time correct mistakes, guarantee the correctness of system model, effectively can prevent the generation of tuning error accident, ensure electric power netting safe running, for electric power enterprise ensures and increase economic efficiency to play very important effect.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment
As shown in Figure 1, the method for calibration of suspicious breakpoint in a kind of electric network model, comprising:
Obtain the coordinate (Xi, Yi) in the center of circle of each transformer station in electric network model, i=1,2,3 ... m, m are the sum of transformer station, and the coordinate (Xj, Yj) of each bar power circuit end points, j=1,2,3 ... n, n are the sum of power circuit;
Successively for the end points (Xj of each power circuit, Yj), find out transformer station's central coordinate of circle (Xi, Yi) simultaneously meeting inequality R – D<abs (Xi-Xj) < R+D and inequality R – D<abs (Yi-Yj) < R+D;
Utilize formula d=abs (Xi-Xj)+abs (Yi-Yj) computing electric line end points (Xj, Yj) with the corresponding transformer station circumferential coordinates (Xi meeting described two inequality, Yi) distance d, wherein abs represents and asks absolute value;
By described distance d compared with transformer station radius R, if d≤R, then judge that described power circuit end points is connected to transformer station circumferentially, if d > is R, then judge the separated of described power circuit end points and transformer station.
The present invention is mainly by scientific and reasonable criterion, and the error model of automatic Verification the whole network, guarantees that built electric network model is entirely true, and the particular location of the model that can also point out faults, has location of mistake function, complete even if error correction is corrected mistakes.
Through a large amount of practices and summary of experience, electrical network error model mainly comprises following several: reference capacity is inconsistent, node voltage is inconsistent, suspicious breakpoint, unsettled element, overlapping elements etc.All error models such as therefore system must identify the suspicious breakpoint of the whole network, the unsettled element of the whole network, the whole network overlapping elements automatically, the whole network node voltage is inconsistent, the whole network reference capacity is inconsistent, and possess location of mistake function, error correction is corrected mistakes and is immediately completed, and guarantees the correctness of system model.
Below, first do one to these type of errors simply to introduce.
1, reference capacity is inconsistent:
In power system computation, first will set a reference capacity, usually office is set to 100M, and office of province is set to 1000M, and a system can only be chosen a reference capacity and calculate.But because reference capacity can manually be arranged according to specific needs, sometimes modeling personnel may arrange different reference capacity at same system, such as office is generally modeling under 100M, but sometimes two reference capacity is arranged on 1000M, input element parameter under different reference capacities, causes the result of calculation mistakes such as short-circuit current voltage.
According to circuitry principle: reference capacity=reference voltage * reference current
I.e. SB=UB*IB
Therefore, when verifying each element in electric network model, check whether it meets a upper formula, if do not met, just proved that reference capacity is inconsistent, model is made mistakes, and the position indicating user that points out faults.
2, node voltage is inconsistent:
According to circuitry ultimate principle, on the same node, voltage is required consistent, and such as, element voltage on same bus is necessarily identical, but likely inconsistent when inputting each component parameters.
Electric network model interior joint comprises bus and earth point.Wherein, ground identically vanishing, need not verify; On bus to connect element numerous, voltage is necessarily consistent, all buses in verification electric network model, to check on each bus whether unanimously connect element voltage, as inconsistent model is made mistakes, and the position indicating user that points out faults.The key step of usual verification is as follows:
1) all branch roads are searched
2) branch road place bus is searched
3) check that whether branch road is consistent with place busbar voltage
3, suspicious breakpoint:
According to electric system feature, circuit two ends necessarily connect force device, and sky connects phenomenon not allow either end to occur.
According to mathematical formulae: distance between two points d=sqrt ((x
2-x
1) * (x
2-x
1)+(y
2-y
1) * (y
2-y
1)), in electric network model, if distance between two points d is less than a threshold value, just think that be connected, according to power circuit extreme coordinates at 2, search other element extreme coordinates in electric network model, and obtain 2 distances, if power circuit one end is not connected with arbitrary, so this end points of power circuit is exactly suspicious breakpoint, model is made mistakes, and the position indicating user that points out faults.
4, unsettled element:
According to electric system feature, the arbitrary end points of element necessarily connects other force device end points, does not allow either end to occur that sky connects phenomenon.
According to distance between two points, search other element extreme coordinates in electric network model, and obtain 2 distances, if element either end is not connected with other any end points, so this element is exactly unsettled element, and model is made mistakes, and the position indicating user that points out faults.
5, overlapping elements:
According to electric system feature, another force device end points of all ends and other of a certain element is not allowed to overlap completely.
According to distance between two points, search other element extreme coordinates in electric network model, and obtain 2 distances, if all end points of element are connected one by one with other element end points, so this element is exactly overlapping elements, and model is made mistakes, and the position indicating user that points out faults.
The veritification of above-mentioned five kinds of error models, except reference capacity is inconsistent, the inconsistent calculated amount of node voltage is not very large, other three kinds of calculated amount are too large, be difficult to stand, must optimize during machine!
Below the prioritization scheme that the present invention proposes is described.
1, the optimization of 2 overlapping criterions:
Distance between two points d=sqrt ((x
2-x
1) * (x
2-x
1)+(y
2-y
1) * (y
2-y
1)), if directly apply mechanically this formula, obtain distance between two points, when enough hour of distance between two points, just think 2 overlaps, each judgement all will use this criterion.
Simplify criterion calculated amount and directly can reduce the total calculated amount of program, we can adopt formula:
D=abs (x
2-x
1)+abs (y
2-y
1), absolute value is asked in abs representative.
Before optimizing compared with the distance between two points formula after optimizing:
1), according to Computer Organization Principles, the time that computing machine carries out plus-minus method is much shorter than the multiplication and division time, the time that computing machine carries out multiplication and division is much shorter than the evolution time, and above formula becomes plus-minus method to calculate with square root abbreviation multiplication and division, greatly can reduce operand;
2), optimize before, 4 subtraction 1 sub-additions, 2 multiplication, 1 evolution need be carried out, optimize after twice subtraction
3), due to above-mentioned criterion will be used everywhere, so reduce at double total computing time.
2, the optimization of suspicious breakpoint verification:
In reality, transformer station's scale is at about 100, and power circuit sum is at about 150, if all compare the distance of power circuit end points to the transformer station center of circle at every turn, so calculated amount is multiplied by 150 powers of 100 2, and calculated amount is astronomical figure, must shortcut calculation.
Optimization Steps:
1) transformer station sorts by central coordinate of circle: bubbling method first sorts by horizontal ordinate from small to large by after ordinate.
Transformer station's title leaves one-dimension array B in, and (1, m), m is transformer station's quantity
2) binary search and the close transformer station's central coordinate of circle of power circuit end points
A, first search the transformer station central coordinate of circle of ordinate close to circuit end points
Yi: transformer station's center of circle ordinate; Yj: power circuit end points ordinate; R: radius of circle; D: threshold value
R–D<abs(Yi-Yj)<R+D
B, search the transformer station central coordinate of circle of horizontal ordinate close to circuit end points again
Xi: transformer station's center of circle ordinate; Xj: power circuit end points ordinate; R: radius of circle; D: threshold value
R–D<abs(Xi-Xj)<R+D
If c finds transverse and longitudinal coordinate close to transformer station's central coordinate of circle of power circuit end points, directly enter next step; Otherwise continue to search;
3) according to the overlapping criterion of the point-to-point transmission after optimization, judge whether in transformer station circumferentially end points
Namely, utilize formula d=abs (Xi-Xj)+abs (Yi-Yj) computing electric line end points (Xj, Yj) with the corresponding transformer station circumferential coordinates (Xi meeting described two inequality, Yi) distance d, again by described distance d compared with transformer station radius R, if d≤R, then judge that described power circuit end points is connected to transformer station circumferentially, if d > is R, then judge the separated of described power circuit end points and transformer station;
4) if search all transformer stations, all can not find circuit end points in transformer station circumferentially, then occur error model, be i.e. suspicious breakpoint.
3, the optimization of unsettled element verification:
Transformer station's scale is at about 100, and force device is individual about more than 1000 greatly, end points at least 2000, if all compare the distance of force device end points to the transformer station center of circle at every turn, so calculated amount 2000 stratum's time computing, calculated amount is astronomical figure, must shortcut calculation.
Optimization Steps:
1) transformer station is by after upper step sequence, numbers to transformer station
Transformer station's title leaves one-dimension array B in, and (1, m), m is transformer station's quantity
2) force device is classified by transformer station
The information such as force device coordinate leave in 2-D data Y (m, n '), and n ' is number of elements in transformer station
3) according to the overlapping criterion of point-to-point transmission after optimization, only judge that in standing, whether the end points of each force device is overlapping
Y
1: the ordinate of first force device end points; X
1: the horizontal ordinate of first force device end points
Y
2: the ordinate of second force device end points; X
2: the horizontal ordinate of second force device end points
D: threshold value abs for asking certain number absolute value
A, obtain distance between two points: d=abs (Y
1-Y
2)+abs (X
1-X
2)
If b is d≤D, 2 overlaps is described, otherwise continues to search
If a certain force device end points is not overlapping with other circuit component end points in station, then there is error model, i.e. unsettled element.
Secondary, efficiency improves without several times.
4, the optimization of overlapping elements verification: calculated amount, must shortcut calculation to two steps are similar above.
Optimization Steps:
1) in utilization, the transformer station of step sorts and numbers.
Transformer station's title leaves one-dimension array B in, and (1, m), m is transformer station's quantity
2) element is classified by transformer station
It is number of elements in transformer station that the information such as element coordinate leave n ' in 2-D data Y (m, n) in
3) according to distance between two points formula, only judge that in station, whether each element is overlapping
Y
1: the ordinate of first force device end points; X
1: the horizontal ordinate of first force device end points
Y
2: the ordinate of second force device end points; X
2: the horizontal ordinate of second force device end points
D: threshold value abs for asking certain number absolute value
A, obtain distance between two points: d=abs (Y
1-Y
2)+abs (X
1-X
2)
If b d≤D illustrates 2 overlaps, otherwise continues to search
If all end points of a certain element of c are all overlapping with the corresponding end points of an other element, then two elements is overlapping
4) if all end points of a certain element are all overlapping with the corresponding end points of an other element in same transformer station, then there is error model, i.e. overlapping elements.
Secondary, efficiency improves without several times.
Safety in production is the lifeline of electric power enterprise, occur that once the light then mistrip removal of load of whole meeting weighs then burning apparatus by mistake, even occur that baked wheaten cake is operated phenomenon, direct economic loss is caused to reach hundreds of thousands between millions of even more than ten million, cause mains breakdown accident sometimes, causing Socie-economic loss larger, is that electric power enterprise can not bear weight.
If electric network model is made mistakes, source mistake rises step by step wrong, and directly cause tuning error accident, the false protection tripping caused thus happens occasionally.And the model checking of the power system computation software that the present invention proposes, the suspicious breakpoint of automatic identification the whole network, the unsettled element of the whole network, the whole network overlapping elements, the whole network node voltage is inconsistent, the whole network reference capacity is inconsistent, etc. all error models, and possess location of mistake function, error correction is corrected mistakes and is immediately completed, guarantee the correctness of system model, fill up domestic and international similar software study blank.
The present invention by the error model of scientific and reasonable criterion automatic Verification the whole network, guarantee that built electric network model is entirely true, effectively can prevent the generation of tuning error accident, there is immeasurable economic benefit and social benefit.Implement the present invention, ensure and increase economic efficiency to play very important guaranteeing role by for electric power enterprise, for electric power enterprise ensures that electric power netting safe running plays very important guaranteeing role.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (1)
1. the method for calibration of suspicious breakpoint in electric network model, is characterized in that, comprise the following steps:
Obtain the coordinate (Xi, Yi) in the center of circle of each transformer station in electric network model, i=1,2,3 ... m, m are the sum of transformer station, and the coordinate (Xj, Yj) of each bar power circuit end points, j=1,2,3 ... n, n are the sum of power circuit;
Successively for the end points (Xj of each power circuit, Yj), find out the transformer station central coordinate of circle (Xi simultaneously meeting inequality R – D<abs (Xi-Xj) < R+D and inequality R – D<abs (Yi-Yj) < R+D, Yi), wherein D represents the threshold value of distance between two points preset in electric network model, and abs represents and asks absolute value;
Utilize formula d=abs (Xi-Xj)+abs (Yi-Yj) computing electric line end points (Xj, Yj) with the corresponding transformer station circumferential coordinates (Xi meeting described two inequality, Yi) distance d, wherein abs represents and asks absolute value;
By described distance d compared with transformer station radius R, if d≤R, then judge that described power circuit end points is connected to transformer station circumferentially, if d > is R, then judge the separated of described power circuit end points and transformer station.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008152638A (en) * | 2006-12-19 | 2008-07-03 | Tepco Systems Corp | Method for drawing power-system control drawing |
| US20120089384A1 (en) * | 2010-10-12 | 2012-04-12 | International Business Machines Corporation | Historic storage of dual layer power grid connectivity model |
| CN104123437A (en) * | 2014-06-30 | 2014-10-29 | 华南理工大学 | Power transmission line crossover identification method and system based on graph database and spatial information |
| CN104600657A (en) * | 2015-01-30 | 2015-05-06 | 国网北京经济技术研究院 | Power system fault calculation result calibration method |
-
2015
- 2015-09-25 CN CN201510627686.1A patent/CN105243205B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008152638A (en) * | 2006-12-19 | 2008-07-03 | Tepco Systems Corp | Method for drawing power-system control drawing |
| US20120089384A1 (en) * | 2010-10-12 | 2012-04-12 | International Business Machines Corporation | Historic storage of dual layer power grid connectivity model |
| CN104123437A (en) * | 2014-06-30 | 2014-10-29 | 华南理工大学 | Power transmission line crossover identification method and system based on graph database and spatial information |
| CN104600657A (en) * | 2015-01-30 | 2015-05-06 | 国网北京经济技术研究院 | Power system fault calculation result calibration method |
Non-Patent Citations (1)
| Title |
|---|
| 陶佳燕: "《继电保护在线校核EMS实时数据匹配及断点问题研究》", 《中国优秀硕士学位论文全文数据库》 * |
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