CN101867179A - Relay protection entire network optimal constant value automatic adjusting and coordinating method - Google Patents
Relay protection entire network optimal constant value automatic adjusting and coordinating method Download PDFInfo
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Abstract
The invention relates to a relay protection entire network optimal constant value automatic adjusting and coordinating method. The method takes electric network structure, equipment parameters and operational mode as initial conditions, all the protected new constant value intervals are calculated according the relay protection adjusting rule; automatic check is carried out on the calculated new constant value according to the adjusting rule and the original constant value; the checked new constant value is stored into a database; and meanwhile adjusting scheme is modified and new constant value calculation is returned, then automatic check is carried out on the calculated new constant value, and the checked new constant value is stored into the database, thus a plurality of times of circulations are carried out and multiple adjusting schemes are stored in an automatic checking database; then intelligent comparison algorithm is adopted, and the optimal constant value solution is selected from the multiple adjusting schemes; and all the adjusting constant values required to be modified are determined according to the solution. The invention utilizes a computer to carry out automatic check, adjusting and comparison, picks out the optimal constant value solution, can greatly improve work efficiency and job content, shortens adjusting time and reduces probability of error adjusting accident.
Description
Technical field
The invention belongs to the power technology field, be specifically related to a kind of method that is used for the relay protection entire network optimal constant value automatic adjusting and coordinating of electrical network.
Background technology
Protective relaying device is the electric power system inalienable part, is the assurance of safe operation of power system, and reasonable disposition is very important with the correct protective relaying device that uses.When carrying out the calculating of electric grid relay protection setting value, the factor that needs to consider is a lot, and wherein the mode of connection of electrical network and operational mode are to having the greatest impact that definite value is calculated.Along with the development of electrical network, scale of power is more and more big, and the mode of connection and operational mode are increasingly sophisticated.Wherein big ring, little ring are mutually nested, and the situation that long line, short-term are cross-linked is commonplace.These are calculated all for adjusting of protection definite value and have brought difficulty.
When relay protection setting calculating is carried out in electric power system; all to strictly observe the primitive rule of adjusting and calculating; as the priority orders that electrical networks at different levels are set; and the sensitivity of wanting the reasonable coordination protection; selectivity; this three's of quick-action relation; usually the principle of following is preferentially to guarantee optionally under the prerequisite; take into account sensitivity; quick-action; so that each protection reaches best operating state; so just must carry out repeatedly and careful calculating the various operational modes and the various faults situation of electrical network; make protection definite value coordinated scheme reach optimum, thus the generation of stopping the tuning error accident.
The principal contradiction problem that the existing computing system of adjusting exists is that fixed value adjusting all relies on artificial experience to adjust.After the mode of connection of electrical network, operational mode, electric component data etc. change, can not intuitively know the mated condition of original definite value efficiently.Need the personnel of adjusting recomputate the definite value of adjusting; determine whether to revise original definite value according to new definite value and original definite value; this setting method inefficiency, work period are long; occur accidents such as tuning error, protective device misoperation easily, and be difficult for finding the minimum optimal constant value solution of definite value that whole electric power system need be revised.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of relay protection entire network optimal constant value automatic adjusting and coordinating; this method can be utilized computer to improve greatly and adjust and cooperate the operating efficiency and the work quality of optimal constant value; shorten setting time, reduce the probability that the tuning error accident takes place.
The technical scheme that addresses the above problem is: the inventive method comprises following content successively:
(1), be initial condition with electric network composition, device parameter, operational mode etc., calculate the new definite value interval of all protections by the relay principle of adjusting;
(2), according to adjust principle and original definite value the new definite value that calculates is checked automatically;
(3), the new definite value after will checking deposits automatic check database in;
(4), simultaneously the new definite value after checking at this is revised setting program;
(5), return (1) step, calculate next new definite value; To next the new definite value that calculates carry out (2) more successively, (3), (4) step, so circulation is adjusted through too much wheel, is depositing many parts of setting programs in the check database automatically;
(6), to many parts of setting programs, according to the situation of its sensitivity and selectivity conflict, and former definite value of each protection situation in new definite value interval whether, adopt intelligent comparison algorithm, select the optimal constant value solution;
(7), determine the definite value of adjusting that all need be revised;
Above-mentioned (1)-(6) step, wherein (4) step modification setting program can be finished automatically by computer, also can be by manually finishing all by computer realization.
Said method utilizes the characteristics of the high computational speed of computer, large buffer memory, in the whole computational process of adjusting, can adjust by Automatic Cycle, store many parts of setting programs, utilize intelligent comparison algorithm then, by the comparison between every part of setting program, finally draw the optimum that can satisfy the real work requirement definite value of adjusting.
The inventive method fully relies on the active computer speed of service, utilizing automatic check definite value and automatic adjusting to cooperate combines, automatically the calculating of adjusting, reduce the situation of human intervention definite value as far as possible, finally provide the optimal constant value solution in conjunction with the electrical network practical operation situation, can increase work efficiency greatly and work quality, shorten setting time, reduce the probability that the tuning error accident takes place.
Description of drawings
Fig. 1, the embodiment of the invention 1 flow chart
Embodiment
Embodiment 1
This example utilizes the specific implementation process of computer to comprise following content successively:
1, at first, according to local power grid structure, device parameter, operational mode and the principle of adjusting, go out the new definite value interval of all protections with COMPUTER CALCULATION.
A difficult problem of on the automatic unlocking problem, running into when adjusting calculating protection cooperation at present large-scale looped network, practical experience during native system calculates in conjunction with adjusting, from reducing the angle of cutting load, in a ring, occur same segment protect during as the looped network automatic adjusting with following three principles and cooperatively interact, form the release principle of endless loop: the offside switch of A, power plant of the main force; The offside branch switch of B, voltage levels transformer station; The offside switch of the transformer station that C, outlet are a lot.These three principles occupy certain weight respectively, in a deadlock looped network that forms, according to the final weight that three principles add up and obtain, determine that certain branch road for mismatching branch road, carries out release automatically.After calculating the definite value interval, if former definite value between the newly developed area in, acquiescence is got former definite value, if former definite value not between the newly developed area in, according to the selectivity that presets preferentially still sensitivity determine that preferentially some values in the definite value interval are as definite value;
2, according to adjust principle and original definite value the new definite value that calculates is checked automatically.Corresponding each bar principle of adjusting can obtain a definite value scope, if judge and final adjust the result not in this scope, then enumerating the principle of originally adjusting is the ungratified principle of adjusting.In judging that if former definite value is not between the newly developed area, then note as a kind of ungratified situation;
3, the new definite value after will checking deposits automatic check database in, enumerates as a setting program;
4, revise setting program: according to check result; can nonintervention adjust principle and tuning coefficient; new departure of value is set automatically; in value new departure is set automatically; if the definite value of newly adjusting does not out satisfy the selectivity to adjacent protection; the adjacent legs of then setting adjacent legs and adjacent legs in next round is adjusted is got the value of the interval corresponding maximum protection scope of definite value, preferentially still is the preferential value of sensitivity according to former definite value and predefined selectivity no longer.To the ungratified situation of sensitivity and former definite value not the situation between the newly developed area do not adjust the value scheme.
5, returned for the 1st step, calculate the new definite value of next round, repeat the 2nd, 3,4 steps more successively, after checking, the new definite value that draws adjusting through modification according to adjust principle and original definite value deposits automatic check database in, and once more the new definite value after this check is made amendment and adjust, so circulation is depositing many parts of setting programs in the check database automatically, ends circulation after the setting program tricks reaches predefined quantity;
6, to many parts of setting programs, situation according to its sensitivity and selectivity conflict, and former definite value of each protection situation in new definite value interval whether, adopt intelligent comparison algorithm, (every weight coefficient is 5 to suppose to have i root branch road not satisfy selectivity, can artificially set), (every weight coefficient is 5 to have j root branch road not satisfy sensitivity, can artificially set), the former definite value of k root branch road is arranged, and (every weight coefficient is 1 not in new definite value interval, can artificially set), coefficient Xs=5*i+5*j+k is optimized in then last adjusting, and the minimum value scheme of k value is the optimal constant value solution;
7,, determine all definite values of adjusting that need revise by artificial at last according to 6 result.
Embodiment 2
As different from Example 1, it is by manually finishing, after promptly finishing in the 3rd step, show check result, add manual intervention that this example the 4th step is revised setting program, enters for the 5th step again after resetting the adjust principle and/or the tuning coefficient of some branch road.
Claims (4)
1. the method for relay protection entire network optimal constant value automatic adjusting and coordinating is characterized in that, comprises following content successively:
(1), be initial condition with electric network composition, device parameter, operational mode etc., calculate the new definite value interval of all protections by the relay principle of adjusting;
(2), according to adjust principle and original definite value the new definite value that calculates is checked automatically;
(3), the new definite value after will checking deposits automatic check database in;
(4), simultaneously the new definite value after checking at this is revised setting program;
(5), return (1) step, calculate next new definite value; To next the new definite value that calculates carry out (2) more successively, (3), (4) step, so circulation is adjusted through too much wheel, is depositing many parts of setting programs in the check database automatically;
(6), to many parts of setting programs, according to the situation of its sensitivity and selectivity conflict, and former definite value of each protection situation in new definite value interval whether, adopt intelligent comparison algorithm, select the optimal constant value solution;
(7), determine the definite value of adjusting that all need be revised;
Above-mentioned (1)-(6) step, wherein (4) step modification setting program can be finished automatically by computer, also can be by manually finishing all by computer realization.
2. the method for relay protection entire network optimal constant value automatic adjusting and coordinating according to claim 1, it is characterized in that, in a ring, occur same segment protect when the described principle of adjusting comprises following three principles of employing as the looped network automatic adjusting and cooperatively interact, form the release principle of endless loop: the offside switch of A, power plant of the main force; The offside branch switch of B, voltage levels transformer station; The offside switch of the transformer station that C, outlet are a lot; Make these three principles occupy certain weight respectively, in a deadlock looped network that forms,, determine that certain branch road for mismatching branch road, carries out release automatically according to the final weight that three principles add up and obtain; After calculating the definite value interval, if former definite value between the newly developed area in, acquiescence is got former definite value, if former definite value not between the newly developed area in, according to the selectivity that presets preferentially still sensitivity determine that preferentially some values in the definite value interval are as definite value.
3. the method for relay protection entire network optimal constant value automatic adjusting and coordinating according to claim 1; it is characterized in that; it is to be finished automatically by computer that (4) step was revised setting program; promptly at the new definite value after checking; new departure of value is set automatically; in value new departure is set automatically; if the definite value of newly adjusting does not out satisfy the selectivity to adjacent protection; the adjacent legs of then setting adjacent legs and adjacent legs in next round is adjusted is got the value of the interval corresponding maximum protection scope of definite value, to check result be the ungratified situation of sensitivity and former definite value not the situation between the newly developed area do not adjust the value scheme.
4. the method for relay protection entire network optimal constant value automatic adjusting and coordinating according to claim 1; it is characterized in that; it is by manually finishing that (4) step was revised setting program; after promptly finishing in (3) step; show check result; add manual intervention, entered for (5) step again after resetting the adjust principle and/or the tuning coefficient of some branch road.
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| CN102386616A (en) * | 2011-11-28 | 2012-03-21 | 南京南瑞继保电气有限公司 | Simulation verification method for relay protection coordination relationship |
| CN102545179A (en) * | 2012-03-14 | 2012-07-04 | 成都电业局 | Method for determining multiple sets of relay protection constant values based on power supply schemes of partial power grids |
| CN102882190A (en) * | 2011-07-15 | 2013-01-16 | 北京市电力公司 | Distribution network line protection setting calculation method and device |
| CN103309252A (en) * | 2012-03-05 | 2013-09-18 | 施耐德电器工业公司 | Method and device for controlling selectivity of electric equipment |
| CN103746337A (en) * | 2014-01-23 | 2014-04-23 | 贵州电网公司六盘水供电局 | Relay protection device constant value modifying and checking system |
| CN103825241A (en) * | 2014-03-18 | 2014-05-28 | 贵州电网公司六盘水供电局 | Method for automatically obtaining zero order parameters of power grid elements |
| CN104242260A (en) * | 2014-08-11 | 2014-12-24 | 深圳供电局有限公司 | Constant time-lag constant value optimizing method based on risk indicators |
| CN104716740A (en) * | 2013-12-17 | 2015-06-17 | 国家电网公司 | Fixed value calibration method, device and system for relay protection device |
| CN105186440A (en) * | 2015-10-31 | 2015-12-23 | 南京南瑞继保电气有限公司 | Relaying protection fixed value setting method based on electromechanical transient method |
| CN105262046A (en) * | 2015-10-08 | 2016-01-20 | 南京南瑞继保电气有限公司 | Relay protection fixed value setting method based on dynamo-electric transient method |
| CN106129972A (en) * | 2016-06-28 | 2016-11-16 | 南宁华供电力科技有限公司 | A kind of two-parameter electric relay protection technology |
| CN107437789A (en) * | 2017-07-20 | 2017-12-05 | 中国神华能源股份有限公司 | The determination method and apparatus of setting valve |
| CN108988304A (en) * | 2018-07-24 | 2018-12-11 | 国电南瑞科技股份有限公司 | A kind of power grid access defence method of magnetic circuit control type fault current limiter |
| CN109767034A (en) * | 2018-12-26 | 2019-05-17 | 广州供电局有限公司 | Setting optimization method, apparatus, computer equipment and the storage medium of relay protection |
| CN109858828A (en) * | 2019-02-22 | 2019-06-07 | 国家电网有限公司 | A kind of power distribution network definite value automatic setting method, device and distribution network systems |
| CN111476461A (en) * | 2020-03-17 | 2020-07-31 | 中国南方电网有限责任公司 | Rapid calculation method for setting parameters of large power grid |
| 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 |
| CN112234587A (en) * | 2020-10-09 | 2021-01-15 | 国网河南省电力公司电力科学研究院 | Power distribution network relay protection fixed value checking and evaluating method and system |
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| CN104716740A (en) * | 2013-12-17 | 2015-06-17 | 国家电网公司 | Fixed value calibration method, device and system for relay protection device |
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