CN103577896A - Regional division method for large-scale power grid setting calculation - Google Patents
Regional division method for large-scale power grid setting calculation Download PDFInfo
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Abstract
The invention relates to a regional division method for large-scale power grid setting calculation. The method comprises the steps that firstly, constraint conditions are set, searching is conducted on a model structure of the whole network according to the constraint conditions, and an initial regional division result is obtained; secondly, the initial regional division result is corrected, and an optimal regional division result is obtained; thirdly, according to the optimal regional division result, the intersection information among all regions is obtained, and a detailed power grid model of each region is obtained; fourthly, according to the intersection information among all the regions and a node impedance matrix of the whole network, a boundary equivalent model of each region is obtained; fifthly, according to the detailed power grid model and the boundary equivalent model of each region, setting calculation is conducted. The regional division method for large-scale power grid setting calculation improves accuracy and reasonability of setting calculation results in each divided region and among the regions, and greatly improves the speed and efficiency of the large-scale power grid setting calculation process.
Description
Technical field
The present invention relates to technical field of power systems, be specifically related to a kind of large scale electric network zoning division methods of adjusting.
Background technology
The calculating of adjusting is that professional core work is protected in scheduling at different levels, and along with the development of computer technology, appliance computer software engineering carries out relay protection fixed value setting and specialized management is emerging technology in recent years always.At present, in relay protection setting computation process, conventionally only set up the detailed model of one's respective area electrical network, adjacent area adopts Equivalent Model to simplify and processes.Adjusting in computation process of intra-zone node, adopt penalty method to calculate the electric parameters of trouble spot, conventionally can guarantee the rationality of result.Yet, the adjusting of boundary node of interregional interconnection, calculate Shortcomings, the one, the back-up protection that cannot take into account between the branch road of adjacent area border coordinates, as the cooperation of distance protection; The 2nd, be unable to estimate the impact of adjacent area changes of operating modes on border, one's respective area branch trouble Branch Computed coefficient.
Feasible settling mode is to set up a unified model that comprises Zone Full electrical network detailed data, carries out the calculating of adjusting under this unified model.This mode is to consider the matching relationship between protection from the whole network angle, the various method of operation combinations that the system of taking into account is possible, thus solve " information island " problem under normal mode, obtain reliable setting valve.Yet from whole network data center angle, it will be objective needing matrix exponent number to be processed in the computation process of adjusting.No matter be to adopt sparse admittance matrix or the sparse technology of other matrixes to calculate, its scale will be all huge, this will cause adjusting calculate length consuming time, speed is slow, affects the treatment effeciency of the software for calculation of adjusting.Therefore, realizing a kind of practicable large electrical network based on uniform data center adjusts and calculates partitioning algorithm tool and be of great significance.
Summary of the invention
The region partitioning method that the object of the present invention is to provide a kind of large scale electric network to adjust and calculate, the method both realized in each partitioned area and accuracy and the rationality of the interregional result of calculation of adjusting, and greatly improved again large scale electric network adjust speed and the efficiency of computation process.
For achieving the above object, the present invention has adopted following technical scheme: the region partitioning method that a kind of large scale electric network is adjusted and calculated, and the method comprises the following steps:
(1) set constraint condition, according to constraint condition, the whole network model structure is searched for, obtain preliminary subregion result;
(2) preliminary subregion result is revised, obtained optimally partitioned result;
(3), according to optimally partitioned result, obtain the detailed electric network model of the mutual common factor information of regional and regional;
(4), according to the mutual common factor information of regional and the nodal impedance matrix of the whole network, obtain the border Equivalent Model of regional;
(5) according to the calculating of adjusting of the detailed electric network model of regional and border Equivalent Model.
Further, target area quantity and the minimum border branch road principle of the constraint condition described in step (1) for setting.
The detailed process that obtains the mutual common factor information of regional described in step (3) is:
A. according to optimally partitioned result, search the boundary node between regional, obtain the boundary node set of regional;
B. setting search method, searches for the adjacent area of regional, obtains the next stage node that is directly connected with boundary node in boundary node set, forms the next stage node set of regional;
C. according to the boundary node set of regional and next stage node set, obtain the mutual common factor information of regional.
What step (5) was described according to the detailed electric network model of regional and the border Equivalent Model detailed process of calculating of adjusting is: decision node region of living in and position, call the calculating of adjusting of the detailed electric network model of region and border Equivalent Model, obtain the result of calculation of adjusting.
Searching method described in step b is breadth-first search.
Cardinal principle of the present invention:
(1), in subregion process, if divided according to administrative region or dispatching management scope, for state, net, the integrated electrical network of province, every sub regions electrical network scale is excessive; For provincial power network, subregion electrical network scale is too small, even may occur unsettled node phenomenon; This dividing mode is not considered the structure of electrical network primary system yet.The present invention adopts a kind of method of semi-automatic subregion,, setting under suitable target area quantity and minimum border branch road principle, by wide area, is searched for and is automatically obtained a preliminary subregion result.Because this preliminary partitioned organization is only considered electric network composition, so after obtaining preliminary subregion result, then revise according to expertise and suggestion, finally obtain adjusting and calculate the optimally partitioned result of use.
(2) adjust to calculate and take the common method of operation as foundation, to the special method of operation, can or process according to actual conditions by special-purpose operating standard.The so-called common method of operation, refers to that normal operating mode and protected equipment are to the normal maintenance mode of a contiguous loop line or an element maintenance.The partition method of adjusting and calculating according to routine, the branch road of each partitioned area inside meets regulation completely.But for region exterior, hang the border branch road of adjacent area Equivalent Model, the wheel that cannot take into account adjacent lines is disconnected.Therefore,, in subregion process, the optimally partitioned result obtaining is expanded to one-level again to adjacent area.Namely, for the adjusting in computation process of border branch road, border branch road is extended to one-level as boundary node to adjacent area to side bus.So just can guarantee the cooperation between relay protection, can consider again the disconnected impact on wing of adjacent lines wheel, in the computation process that also can not cause adjusting, matrix size rises appreciably.
Advantage of the present invention:
(1) the present invention adopts the method for semi-automatic subregion, first according to target area quantity and the minimum border branch road principle set, by wide area search, obtain preliminary subregion result, then according to expertise and suggestion, preliminary subregion result is revised, obtained optimally partitioned result.The method of this semi-automatic subregion, can either avoid, according to the excessive or too small drawback in region of administrative division generation, having improved again the precision of partition model and the speed of subregion.
(2) the present invention by expanding one-level to adjacent area on the basis of existing boundary; this is not only conducive to the cooperation between relay protection; consider the disconnected impact on border branch road of adjacent lines wheel, also can not cause rising appreciably of matrix size in the computation process of adjusting.Thereby both realized in each partitioned area and accuracy and the rationality of the interregional result of calculation of adjusting, greatly improved again large scale electric network adjust speed and the efficiency of computation process.
(3) the present invention is by the computation process of adjusting, the detailed electric network model of node place subregion and border Equivalent Model are analyzed simultaneously, thereby guaranteed the accuracy of setting valve, avoided the appearance of " information island " problem.
In sum, the present invention has not only solved a storage difficult problem for ultra-large matrix, has improved the counting yield of adjusting of large scale electric network; Integrality that each by stages protection coordinates and braning factor have accurately also been ensured.
Accompanying drawing explanation
Fig. 1 is workflow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
As shown in Figure 1, the region partitioning method that a kind of large scale electric network is adjusted and calculated, the method comprises the following steps:
(1) set constraint condition, according to constraint condition, the whole network model structure is searched for, obtain preliminary subregion result;
(2) preliminary subregion result is revised, obtained optimally partitioned result;
(3), according to optimally partitioned result, obtain the detailed electric network model of the mutual common factor information of regional and regional;
(4), according to the mutual common factor information of regional and the nodal impedance matrix of the whole network, obtain the border Equivalent Model of regional;
(5) according to the calculating of adjusting of the detailed electric network model of regional and border Equivalent Model.
Further, target area quantity and the minimum border branch road principle of the constraint condition described in step (1) for setting.Minimum border branch road principle in the partition process of region, guarantee that the branch road of each zone boundary is minimum.By minimum border branch road principle, can improve the precision of partition model and the speed of subregion.
Further, the detailed process that obtains the mutual common factor information of regional described in step (3) is:
A. according to optimally partitioned result, search the boundary node between regional, obtain the boundary node set of regional.
B. setting search method, searches for the adjacent area of regional, obtains the next stage node that is directly connected with boundary node in boundary node set, forms the next stage node set of regional.By the next stage node that boundary node is associated, search for, make the scope of the border Equivalent Model of each partitioned area extend one-level to adjacent area.Thereby not only can meet the cooperation between relay protection, adjacent lines wheel can be broken the impact of border branch road is taken into account again.
C. according to the boundary node set of regional and next stage node set, obtain the mutual common factor information of regional.
Further, what step (5) was described according to the detailed electric network model of regional and the border Equivalent Model detailed process of calculating of adjusting is: decision node region of living in and position, call the calculating of adjusting of the detailed electric network model of region and border Equivalent Model, obtain the result of calculation of adjusting.
Further, the searching method described in step b is breadth-first search.Breadth-first search is simple and convenient, can find rapidly destination node, thereby the speed of having accelerated to adjust and having calculated has improved counting yield.
Specific works flow process of the present invention is:
First, the software for calculation of adjusting, according to target partition quantity and the minimum border branch road principle set, is divided into several subregions by whole electric network composition, obtains preliminary subregion result.Secondly, the calculating professional that adjusts rule of thumb adjusts and confirms preliminary subregion result, obtains optimally partitioned result.Again, according to optimally partitioned result, obtain the detailed electric network model of regional, i.e. intra-zone model.Again, search the boundary node set of each by stages, and according to breadth-first search, in the adjacent area of each subregion, search for the next stage node being directly connected with boundary node, obtain next stage node set, make boundary node set and next stage node set become the mutual common factor information of regional.Again, according to the mutual common factor information of regional and the whole network nodal impedance matrix, obtain the border Equivalent Model of regional.Finally, according to the calculating of adjusting of the detailed electric network model of regional and border Equivalent Model, obtain result of calculation.
In sum, the present invention adopts the method for semi-automatic subregion, first according to target area quantity and the minimum border branch road principle set, by wide area search, obtain preliminary subregion result, then according to expertise and suggestion, preliminary subregion result is revised, obtained optimally partitioned result.The method of this semi-automatic subregion, can either avoid, according to the excessive or too small drawback in region of administrative division generation, having improved again the precision of partition model and the speed of subregion.The present invention by the basis of existing boundary to adjacent area expansion one-level, this is not only conducive to the cooperation between relay protection, considers the disconnected impact on border branch road of adjacent lines wheel, also can not cause rising appreciably of matrix size in the computation process of adjusting.Thereby both realized in each partitioned area and accuracy and the rationality of the interregional result of calculation of adjusting, greatly improved again large scale electric network adjust speed and the efficiency of computation process.The present invention is by the computation process of adjusting, the detailed electric network model of node place subregion and border Equivalent Model are analyzed simultaneously, thereby guaranteed the accuracy of setting valve, avoided the appearance of " information island " problem.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.
Claims (5)
1. the region partitioning method that large scale electric network is adjusted and calculated, is characterized in that: the method comprises the following steps:
(1) set constraint condition, according to constraint condition, the whole network model structure is searched for, obtain preliminary subregion result;
(2) preliminary subregion result is revised, obtained optimally partitioned result;
(3), according to optimally partitioned result, obtain the detailed electric network model of the mutual common factor information of regional and regional;
(4), according to the mutual common factor information of regional and the nodal impedance matrix of the whole network, obtain the border Equivalent Model of regional;
(5) according to the calculating of adjusting of the detailed electric network model of regional and border Equivalent Model.
2. the region partitioning method that a kind of large scale electric network according to claim 1 is adjusted and calculated, is characterized in that: target area quantity and the minimum border branch road principle of the constraint condition described in step (1) for setting.
3. the region partitioning method that a kind of large scale electric network according to claim 1 is adjusted and calculated, is characterized in that: the detailed process that obtains the mutual common factor information of regional described in step (3) is:
A. according to optimally partitioned result, search the boundary node between regional, obtain the boundary node set of regional;
B. setting search method, searches for the adjacent area of regional, obtains the next stage node that is directly connected with boundary node in boundary node set, forms the next stage node set of regional;
C. according to the boundary node set of regional and next stage node set, obtain the mutual common factor information of regional.
4. the region partitioning method that a kind of large scale electric network according to claim 1 is adjusted and calculated, it is characterized in that: what step (5) was described according to the detailed electric network model of regional and the border Equivalent Model detailed process of calculating of adjusting is: decision node region of living in and position, call the calculating of adjusting of the detailed electric network model of region and border Equivalent Model, obtain the result of calculation of adjusting.
5. the region partitioning method that a kind of large scale electric network according to claim 3 is adjusted and calculated, is characterized in that: the searching method described in step b is breadth-first search.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105389741A (en) * | 2015-11-02 | 2016-03-09 | 国网福建省电力有限公司 | Power grid cutting method based on feature recognition |
| CN105610153A (en) * | 2016-01-18 | 2016-05-25 | 国家电网公司 | Rapid and intelligent partitioning algorithm based on clustering analysis |
| CN107291562A (en) * | 2016-04-13 | 2017-10-24 | 中国电力科学研究院 | A kind of method for building up of power distribution network operation situation information model |
| CN108549739A (en) * | 2018-03-05 | 2018-09-18 | 国网安徽省电力有限公司 | Protective device point information modeling method based on sparse matrix and system |
| CN109390943A (en) * | 2018-12-27 | 2019-02-26 | 国电南瑞科技股份有限公司 | Based on the online equivalent the whole network Analysis of Short-Circuit Current method and system of external network |
| CN111725777A (en) * | 2020-06-09 | 2020-09-29 | 云南电网有限责任公司临沧供电局 | Ring network automatic ring-opening matching setting method and system based on node loop analysis |
| CN112417372A (en) * | 2020-12-07 | 2021-02-26 | 国网新疆电力有限公司 | Fixed value setting calculation method and system suitable for power grid of any scale |
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| CN103199493A (en) * | 2013-04-19 | 2013-07-10 | 山东电力集团公司 | Realizing method of distributed networking relay protection setting calculation system |
| CN103246933A (en) * | 2013-04-02 | 2013-08-14 | 中国南方电网有限责任公司 | Online check partition method based on virtual impedance matrix and boundary node migration |
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| CN103246933A (en) * | 2013-04-02 | 2013-08-14 | 中国南方电网有限责任公司 | Online check partition method based on virtual impedance matrix and boundary node migration |
| CN103199493A (en) * | 2013-04-19 | 2013-07-10 | 山东电力集团公司 | Realizing method of distributed networking relay protection setting calculation system |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105389741A (en) * | 2015-11-02 | 2016-03-09 | 国网福建省电力有限公司 | Power grid cutting method based on feature recognition |
| CN105610153A (en) * | 2016-01-18 | 2016-05-25 | 国家电网公司 | Rapid and intelligent partitioning algorithm based on clustering analysis |
| CN105610153B (en) * | 2016-01-18 | 2017-12-26 | 国家电网公司 | A kind of quick, intelligent partitioning algorithm based on cluster analysis |
| CN107291562A (en) * | 2016-04-13 | 2017-10-24 | 中国电力科学研究院 | A kind of method for building up of power distribution network operation situation information model |
| CN108549739A (en) * | 2018-03-05 | 2018-09-18 | 国网安徽省电力有限公司 | Protective device point information modeling method based on sparse matrix and system |
| CN108549739B (en) * | 2018-03-05 | 2022-05-03 | 国网安徽省电力有限公司 | Sparse matrix-based protection device constant value information modeling method and system |
| CN109390943A (en) * | 2018-12-27 | 2019-02-26 | 国电南瑞科技股份有限公司 | Based on the online equivalent the whole network Analysis of Short-Circuit Current method and system of external network |
| CN109390943B (en) * | 2018-12-27 | 2021-09-28 | 国电南瑞科技股份有限公司 | Whole-network short-circuit current analysis method and system based on external network online equivalence |
| CN111725777A (en) * | 2020-06-09 | 2020-09-29 | 云南电网有限责任公司临沧供电局 | Ring network automatic ring-opening matching setting method and system based on node loop analysis |
| CN111725777B (en) * | 2020-06-09 | 2022-05-24 | 云南电网有限责任公司临沧供电局 | Ring network automatic ring-opening matching setting method and system based on node loop analysis |
| CN112417372A (en) * | 2020-12-07 | 2021-02-26 | 国网新疆电力有限公司 | Fixed value setting calculation method and system suitable for power grid of any scale |
| CN112417372B (en) * | 2020-12-07 | 2024-02-09 | 国网新疆电力有限公司 | Fixed value setting calculation method and system suitable for power grid of any scale |
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