CN102738791A - On-line static security analysis method based on topological comparison - Google Patents
On-line static security analysis method based on topological comparison Download PDFInfo
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Abstract
The invention provides an on-line static security analysis method based on topological comparison, and belongs to the technical field of computing of a power system. On the basis that the topological structure of a section is not changed, a factor table under a ground state section and inverse matrix information used in quick fault filtration for direct current tide are fully used; and under the condition that the topological structure of the section is changed, the factor table is corrected through partial topological analysis and a partial factor correction technology, and the on-line static security analysis method is provided on this basis. By the on-line static security analysis method, the static security analysis computing speed is increased; based on the change characteristic of the topological structure of an on-line system, on-line static security analysis is performed by fully using a measure combining topological comparison, process value reuse and partial topological analysis; the load rate of a computing server is reduced; and the scanning speed of the current section and a reusable section is increased.
Description
Technical field
The invention belongs to the electric power system computing field, be specifically related to a kind of based on topology online static security analysis method relatively
Background technology
The static security analysis of on-line operation carries out forecast failure scanning according to setting cycle or Event triggered mode to the whole network; Its basic procedure is: at first obtain the whole network model and real time operation mode data through universal data interface IEC61970 standard (CIM/XML) or domestic power scheduling conventional data standard (E language), generate forecast failure collection to be scanned; Adopt the DC power flow algorithm computation to obtain being similar under the fault trend then and separate, filter out the suspected fault collection that possibly cause equipment out-of-limit; At last the suspected fault collection is done labor, promptly the section after the fault is carried out AC power flow and calculate and obtain accurately trend and separate, thereby obtain the out-of-limit information of the whole network behind the forecast failure.Because the change procedure of actual electric network state is relatively slow, online static security analysis fixed cycle starts calculating, and the cycle was generally 5-15 minute, and adjacent section is short blanking time, and topology of networks changes very little even not variation usually.
Along with the fast development with power industry of maintaining sustained and rapid growth of Electricity Demand, scale of power constantly enlarges, and the electric power system static security analysis guarantees that the safe operation of electric power system is significant.Broad research to the accident of having a power failure on a large scale both at home and abroad shows; Mostly be to destroy by the static security constraint progressively to develop; Transmission of electricity such as circuit on power system and transformer element breaks down out of service, causes power and shifts on a large scale, causes the adjacent elements overload; Form chain overload trip, finally cause large area blackout.
The network analysis application software of present dispatching patcher above the provincial level all possesses the static security analysis function; Confirm through static security analysis whether electrical network causes the out-of-limit phenomenon of equipment under forecast accidents such as current operational mode generation line tripping, thereby find the potential safety hazard of operation of power networks.The static security analysis of on-line operation was generally 5-15 minute in the scan period of control centre; It is shorter that the dispatching patcher of having relatively high expectations need be calculated the time of scanning; With actual net adjusting system is example; The static security analysis scan period of on-line operation is 1 minute at present, presses for the computational speed that improves online static security analysis; In addition; The fast development of electrical network makes that scheduling scale of power at different levels are increasing, and the computing node number of regional power grid is mostly above 2000; That have even reached more than 4000, so large-scale calculate to electrical network fast and safely the speed of analytical method more exigence is also proposed.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art; It is a kind of based on topology online static security analysis method relatively that the present invention provides; Improved the computational speed of static security analysis, be based on the topologies change characteristic of wire system, online static security analysis is carried out in the measure that make full use of topological comparison, process variable is multiplexing to combine with the local topology analysis; Reduce the load factor of calculation server, improved the sweep speed of current section and reusable section.
In order to realize the foregoing invention purpose, the present invention takes following technical scheme:
A kind of based on topology online static security analysis method relatively, said method comprising the steps of:
Step 1: confirm the reusable section;
Step 2: said current section and reusable section topological structure compare, if both on off state information is identical, then execution in step 3, if the electrical network computing node then execution in step 4 that changes after difference and the local topology analysis;
Step 3: utilize reusable section compute matrix information to carry out static security analysis;
Step 4: the local topology analysis obtains the change in topology result, revises reusable section compute matrix information and carries out static security analysis.
In the said step 1, in the static security analysis of dispatching patcher, obtain real time data and carry out forecast failure scanning on this basis, store current section correlation computations matrix information, confirm that current section is the reusable section; If reusable section and present analysis section topology change, to revise reusable section compute matrix information and carry out the forecast failure scanning of phase this week, real-time update reusable section is current section.
Said step 3 may further comprise the steps:
Step 3-1: the factor table that obtains the B ', B " and B ', B " of reusable section backup;
Step 3-2: the inverse matrix of B ' during the DC power flow that obtains the backup of reusable section filters and calculates;
Step 3-3: revise section and inject node power;
Step 3-4: calculate the ground state trend and obtain initial trend;
Step 3-5: utilize the inverse matrix of B ' to carry out the DC power flow fault filtering, obtain the suspected fault collection through reducing out-of-limit threshold mode;
Step 3-6: the suspected fault collection is analyzed, obtained the trend result of the out-of-limit equipment under the forecast failure.
In the said step 4, through local factors correction reusable section compute matrix information.
Said step 4 may further comprise the steps:
Step 4-1: the local topology analysis, and node classified;
Step 4-2: said factor table is revised according to the node classification;
Step 4-3: revise section and inject node power;
Step 4-4: calculate the ground state trend and obtain initial trend, and carry out the DC power flow fault filtering;
Step 4-5: the revised section of local factors is confirmed as the reusable section, and preserve its reusable information;
Step 4-6: find out the suspected fault collection and carry out labor through the out-of-limit threshold mode of reduction equipment.
After topology changes with node be divided into newly-increased node, deletion of node, directly change node, change node and no change node indirectly.
Utilize sparse phasor method, factorization method again and fast former generation/back substitution method on reusable section basis, carry out the suspected fault analysis, thereby obtain the out-of-limit situation of equipment behind the forecast failure.
Compared with prior art, beneficial effect of the present invention is:
1. save the ground state trend to the whole network topology again, node sequencing, formation admittance matrix, the factor decompose, step such as Jacobian matrix is inverted and the whole network step direct modification node injecting powers consuming time such as topology, the decomposition of the whole network factor again; Carry out iterative computation, thereby accelerate the computational speed of ground state trend;
2. be based on the topologies change characteristic of wire system, online static security analysis is carried out in the measure that make full use of topological comparison, process variable is multiplexing to combine with the local topology analysis, has reduced the load factor of calculation server;
3. improved the sweep speed of current section and reusable section;
4. make full use of incidence relation and electric network state quantitative change process property characteristics between the real-time section of dispatching patcher, for online static security analysis provides new method.
Description of drawings
Fig. 1 is based on topology online static security analysis method flow diagram relatively in the embodiment of the invention;
Fig. 2 is local topology analysis process figure in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
Like Fig. 1, a kind of based on topology online static security analysis method relatively, said method comprising the steps of:
Step 1: confirm the reusable section;
Step 2: said current section and reusable section topological structure compare; Not have before and after the on off state position changes to increase or deletion calculating bus then both on off state information is identical; Then execution in step 3; Having before and after the on off state position changes increases or bus is calculated in deletion, the electrical network computing node then execution in step 4 that changes after the local topology analysis;
Step 3: utilize reusable section compute matrix information to carry out static security analysis;
Step 4: the local topology analysis obtains the change in topology result, revises reusable section compute matrix information and carries out static security analysis.
In the said step 1, in the static security analysis of dispatching patcher, obtain real time data and carry out forecast failure scanning on this basis, store current section correlation computations matrix information, confirm that current section is the reusable section; If reusable section and present analysis section topology change, to revise reusable section compute matrix information and carry out the forecast failure scanning of phase this week, real-time update reusable section is current section.
Said step 3 may further comprise the steps:
Step 3-1: the factor table that on the basis of reusable section, obtains the B ', B " and B ', B " of reusable section backup;
Step 3-2: the inverse matrix of obtaining the B ' that the DC power flow fault filtering is calculated under the reusable section;
Step 3-3: revise section and inject node power;
Step 3-4: calculate the ground state trend and obtain initial trend;
Step 3-5: utilize the inverse matrix of B ' to carry out the DC power flow fault filtering, obtain the suspected fault collection through reducing out-of-limit threshold mode;
Step 3-6: the suspected fault collection is analyzed, obtained the trend result of the out-of-limit equipment under the forecast failure.
In the said step 4, through local factors correction reusable section compute matrix information.
Said step 4 may further comprise the steps:
Step 4-1: local topology analysis (like Fig. 2), and node classified;
Step 4-2: said factor table is revised according to the node classification;
Step 4-3: revise section and inject node power;
Step 4-4: calculate the ground state trend and obtain initial trend, and carry out the DC power flow fault filtering;
Step 4-5: the revised section of local factors is confirmed as the reusable section, and preserve its reusable information;
Step 4-6: find out the suspected fault collection and carry out labor through the out-of-limit threshold mode of reduction equipment.
After the change in topology with node be divided into newly-increased node, deletion of node, directly change node, change node and no change node indirectly.
Utilize sparse phasor method, factorization method again and fast former generation/back substitution method on reusable section basis, carry out the suspected fault labor, thereby obtain the out-of-limit situation of equipment behind the forecast failure.
In sum; Method provided by the invention has improved the computational speed of static security analysis; Be based on the topologies change characteristic of wire system; Online static security analysis is carried out in the measure that make full use of topological comparison, process variable is multiplexing to combine with the local topology analysis, has reduced the load factor of calculation server, has improved the sweep speed of current section and reusable section.
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although the present invention has been carried out detailed explanation with reference to the foregoing description; Under the those of ordinary skill in field be to be understood that: still can specific embodiments of the invention make amendment or be equal to replacement; And do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. one kind based on topology online static security analysis method relatively, it is characterized in that: said method comprising the steps of:
Step 1: confirm the reusable section;
Step 2: said current section and reusable section topological structure compare, if both on off state information is identical, then execution in step 3, if the electrical network computing node then execution in step 4 that changes after difference and the local topology analysis;
Step 3: utilize reusable section compute matrix information to carry out static security analysis;
Step 4: the local topology analysis obtains the change in topology result, revises reusable section compute matrix information and carries out static security analysis.
2. according to claim 1 based on topology online static security analysis method relatively; It is characterized in that: in the said step 1; In the static security analysis of dispatching patcher, obtain real time data and carry out forecast failure scanning on this basis; Store current section correlation computations matrix information, confirm that current section is the reusable section; If reusable section and present analysis section topology change, to revise reusable section compute matrix information and carry out the forecast failure scanning of phase this week, real-time update reusable section is current section.
3. according to claim 1 based on topology online static security analysis method relatively, it is characterized in that: said step 3 may further comprise the steps:
Step 3-1: the factor table that obtains the B ', B " and B ', B " of reusable section backup;
Step 3-2: the inverse matrix of obtaining the B ' that the DC power flow fault filtering of reusable section backup calculates;
Step 3-3: revise section and inject node power;
Step 3-4: calculate the ground state trend and obtain initial trend;
Step 3-5: utilize the inverse matrix of B ' to carry out the DC power flow fault filtering, obtain the suspected fault collection through reducing out-of-limit threshold mode;
Step 3-6: the suspected fault collection is analyzed, obtained the trend result of the out-of-limit equipment under the forecast failure.
4. according to claim 1 based on topology online static security analysis method relatively, it is characterized in that: in the said step 4, through local factors correction reusable section compute matrix information.
5. according to claim 1 based on topology online static security analysis method relatively, it is characterized in that: said step 4 may further comprise the steps:
Step 4-1: the local topology analysis, and node classified;
Step 4-2: said factor table is revised according to the node classification;
Step 4-3: revise section and inject node power;
Step 4-4: calculate the ground state trend and obtain initial trend, and carry out the DC power flow fault filtering;
Step 4-5: the revised section of local factors is confirmed as the reusable section, and preserve its reusable information;
Step 4-6: find out the suspected fault collection and carry out labor through the out-of-limit threshold mode of reduction equipment.
6. according to claim 5 based on topology online static security analysis method relatively, it is characterized in that: with node be divided into newly-increased node, deletion of node, directly change node, change node and no change node indirectly.
7. according to claim 1 based on topology online static security analysis method relatively; It is characterized in that: utilize sparse phasor method, factorization method again and fast former generation/back substitution method on reusable section basis, carry out the suspected fault analysis, thereby obtain the out-of-limit situation of equipment behind the forecast failure.
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| CN103985066A (en) * | 2014-05-20 | 2014-08-13 | 天津大学 | Method for evaluating power system static risk based on hybrid power flow |
| CN103985065A (en) * | 2014-05-20 | 2014-08-13 | 天津大学 | Method for evaluating electric power system risk based on fault pre-scanning |
| CN104993477A (en) * | 2015-06-29 | 2015-10-21 | 中国电力科学研究院 | Static safety parallel analysis method for AC-DC power grid based on configuration mode |
| CN106058856B (en) * | 2016-07-01 | 2019-07-23 | 中国南方电网有限责任公司 | A kind of method of quick analysis power grid static security |
| CN114828154A (en) * | 2022-06-27 | 2022-07-29 | 深圳市信润富联数字科技有限公司 | 5G topology analysis system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103985066A (en) * | 2014-05-20 | 2014-08-13 | 天津大学 | Method for evaluating power system static risk based on hybrid power flow |
| CN103985065A (en) * | 2014-05-20 | 2014-08-13 | 天津大学 | Method for evaluating electric power system risk based on fault pre-scanning |
| CN103985066B (en) * | 2014-05-20 | 2017-05-03 | 天津大学 | Method for evaluating power system static risk based on hybrid power flow |
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| CN104993477A (en) * | 2015-06-29 | 2015-10-21 | 中国电力科学研究院 | Static safety parallel analysis method for AC-DC power grid based on configuration mode |
| CN104993477B (en) * | 2015-06-29 | 2017-10-17 | 中国电力科学研究院 | A kind of alternating current-direct current power network static security Parallel analytic method based on configuration mode |
| CN106058856B (en) * | 2016-07-01 | 2019-07-23 | 中国南方电网有限责任公司 | A kind of method of quick analysis power grid static security |
| CN114828154A (en) * | 2022-06-27 | 2022-07-29 | 深圳市信润富联数字科技有限公司 | 5G topology analysis system |
| CN114828154B (en) * | 2022-06-27 | 2022-11-15 | 深圳市信润富联数字科技有限公司 | 5G topology analysis system |
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