CN105678019B - A kind of method that online check covers definite value more - Google Patents
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Abstract
The present invention discloses a kind of online method for checking more set definite values, comprising steps of (1) calculates the definite value under shifting gears using synchronizing calculation method；(2) the breaker number of establishing protection is m, then protective device number is 2m；(3) setting every covering device, there are four definite value areas；(4) definite value in each definite value area of computing device and the initiation value degree of deviation, the sensitivity degree of deviation, the III of Distance section of calculated value are hided the load-bearing capacity degree of deviation；(5) the selective degree of deviation of the definite value in the definite value area of computing device and calculated value and cooperate the optimum combination in branch definite value area with it；(6) if definite value area number is less than 4, return step (4) is no to then follow the steps (7)；(7) the corresponding variance index of computing device；(8) the corresponding definite value area of device under real-time mode is selected；(9) if device number is less than 2m, return step (4) is no to then follow the steps (10)；(10) checking terminates.
Description
Technical field
The invention belongs to the technical fields of operation of power networks, more particularly to a kind of online method for checking more set definite values.
Background technique
With the development of power grid, capital construction, transformation project are largely gone into operation, and temporal fashion becomes increasingly complex, and operation of power networks faces
Challenge constantly enhance.The first line of defence of the relay protection as power grid plays vital work to electric power netting safe running
With.It is therefore desirable to which dispatching of power netwoks should constantly reinforce the real-time control ability to power grid, especially to relay protection action behavior
Control ability.The problem of accident that foreign countries repeatedly have a power failure on a large scale is exposed, absolutely proves that dispatcher grasps relay protection at any time
The importance of action behavior.
All kinds of function have been built based on integrated operation of power networks intelligence system (hereinafter referred to as " OS2 system ") basic platform
Can powerful advanced application, these advanced applications provide the functions such as monitoring abundant, early warning for power scheduling, but do not have still
Online check and early warning for real-time grid information to protection definite value.Therefore, it is built to meet smart grid and intelligent scheduling
Demand, improve relay protection personnel, power scheduling personnel, method of operation personnel to the control energy of relay protection action behavior
Power proposes the requirement based on OS2 system-based platform construction relay protection constant value on-line check and early warning application.
Relay protection constant value on-line check and early warning application, the safe and stable operation for bulk power grid, interregional grid provide skill
Art support and guarantee guarantee the reliability service of power grid, reduce manpower to power system power supply reliability is improved to the maximum extent
Waste improves Business Economic Benefit and is of great significance.
Existing online nucleus correcting system is checked just for the definite value in a definite value area, due to needing artificial calculating,
So power grid power supply reliability and safety are poor.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of more set definite values of online check
Method can be avoided artificial calculation amount and artificial calculating error, to greatly improve power grid power supply reliability and safety.
The technical solution of the invention is as follows: the method that this online check covers definite value more, comprising the following steps:
(1) definite value under shifting gears is calculated using synchronizing calculation method；
(2) the breaker number of establishing protection is m, then protective device number is 2m, and m is positive integer；
(3) setting every covering device, there are four definite value areas；
(4) definite value in each definite value area of computing device and the initiation value degree of deviation of calculated value, the sensitivity degree of deviation, away from
Hide from III section the load-bearing capacity degree of deviation；
(5) the selective degree of deviation of the definite value in the definite value area of computing device and calculated value and cooperate branch definite value area with it
Optimum combination；
(6) if definite value area number is less than 4, return step (4) is no to then follow the steps (7)；
(7) by the initiation value degree of deviation, the sensitivity degree of deviation and III of Distance section hide the load-bearing capacity degree of deviation and selection sexual deviation
Degree is brought into formula (1), the corresponding variance index of computing device
Wherein I indicates that the sum of the definite value item stadd of verification initiation value, J indicate the definite value item reldd's of verification reliability
Sum, K indicate that the sum of the definite value item sendd of verification sensitivity, L indicate the sum of the definite value item seldd of verification selectivity, M
Indicate that the sum of the definite value item disdd of III section of load-bearing capacity of hiding of checking distance, n indicate the total number of definite value item in device；
(8) the corresponding definite value area of device under selection real-time mode is closed according to variance minimum and profile error definite value district's groups；
(9) if device number is less than 2m, return step (4) is no to then follow the steps (10)；
(10) checking terminates.
Definite value is divided into Operational Zone and spare area by the present invention, right by the check principle and check performance indicator of selection
The definite value of Operational Zone and the definite value of spare area are checked respectively, and by comparing performance of relay setting index, it is optimal to select comprehensive performance
The corresponding definite value area of definite value item, then Operational Zone is cut into the optimal constant value area of selection, thus can be avoided artificial calculation amount and
It is artificial to calculate error, to greatly improve power grid power supply reliability and safety.
Detailed description of the invention
Fig. 1 shows the flow chart that online check according to the present invention covers the method for definite value more.
Specific embodiment
As shown in Figure 1, this online check covers the method for definite value more, comprising the following steps:
(1) definite value under shifting gears is calculated using synchronizing calculation method；
(2) the breaker number of establishing protection is m, then protective device number is 2m, and m is positive integer；
(3) setting every covering device, there are four definite value areas；
(4) definite value in each definite value area of computing device and the initiation value degree of deviation of calculated value, the sensitivity degree of deviation, away from
Hide from III section the load-bearing capacity degree of deviation；
(5) the selective degree of deviation of the definite value in the definite value area of computing device and calculated value and cooperate branch definite value area with it
Optimum combination；
(6) if definite value area number is less than 4, return step (4) is no to then follow the steps (7)；
(7) by the initiation value degree of deviation, the sensitivity degree of deviation and III of Distance section hide the load-bearing capacity degree of deviation and selection sexual deviation
Degree is brought into formula (1), the corresponding variance index of computing device
Wherein I indicates that the sum of the definite value item stadd of verification initiation value, J indicate the definite value item reldd's of verification reliability
Sum, K indicate that the sum of the definite value item sendd of verification sensitivity, L indicate the sum of the definite value item seldd of verification selectivity, M
Indicate that the sum of the definite value item disdd of III section of load-bearing capacity of hiding of checking distance, n indicate the total number of definite value item in device；
(8) the corresponding definite value area of device under selection real-time mode is closed according to variance minimum and profile error definite value district's groups；
(9) if device number is less than 2m, return step (4) is no to then follow the steps (10)；
(10) checking terminates.
Definite value is divided into Operational Zone and spare area by the present invention, right by the check principle and check performance indicator of selection
The definite value of Operational Zone and the definite value of spare area are checked respectively, and by comparing performance of relay setting index, it is optimal to select comprehensive performance
The corresponding definite value area of definite value item, then Operational Zone is cut into the optimal constant value area of selection, thus can be avoided artificial calculation amount and
It is artificial to calculate error, to greatly improve power grid power supply reliability and safety.
Preferably, in the step of this method (5), remember that four definite value areas of the first set protection of branch A are A11 respectively,
A12, A13, A14, four definite value areas of the first set protection of branch B are B11, B12, B13, B14, and the first set of branch C is protected
Four definite value areas be C11, C12, C13, C14, branch D first set protection four definite value areas be D11, D12, D13, D14,
The step (5) include it is following step by step:
(5.1) selective degree of deviation when branch A definite value area A11 and 1 definite value area B11 of adjacent legs B device cooperates is calculated；
(5.2) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B12 cooperates is calculated；
(5.3) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B13 cooperates is calculated；
(5.4) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B14 cooperates is calculated；
(5.5) the selective degree of deviation in each definite value area under A11 and adjacent legs C, D difference covering device is calculated；
(5.6) selectivity in each definite value area under A12 (or A13, A14) and adjacent legs B, C, D difference covering device is calculated
The degree of deviation.
Preferably, four all of definite value area of A11 and device B1, C1, D1 of branch B, C, D match in the step (5)
All contain B1j (j=1,2,3,4), C1j (j=1,2,3,4), D1j (j=1,2,3,4) in being combined, before verifying selectivity
Only need first to calculate A11 and B1j, A11 and C1j, degree of deviation when A11 and D1j cooperate, then take combination (A11, B1j,
C1j, D1j) in three cooperation maximum values as the combination deviation degree, the degree of deviation then chosen in all combinations is the smallest by one
The degree of deviation of the group combination as a definite value area, calculates the selective degree of deviation in all definite value areas out branch A in the same way.
Preferably, in the step (5) use pruning algorithms, first using calculated first combine the degree of deviation as
The current optimal degree of deviation, for next combination, when any one degree of deviation in combination is greater than the current optimal degree of deviation, then
Directly give up the combination, if each degree of deviation of next combination is both less than equal to the current optimal degree of deviation, chooses the combination
In maximum deviation degree in three degrees of deviation as the current optimal degree of deviation, successively scan for, final choice goes out optimal choosing
Select sexual deviation degree.
The present invention is described more particularly below.
When electric network composition and changes of operating modes, such as newly added equipment, for definite value area optimal in selecting device, this hair
It is bright to be realized using online nucleus correcting system, by taking 220kV and the above power grid as an example, two sets of protective devices are configured on breaker, every set is protected
There are four definite value area on protection unit, calculate that each definite value item in each definite value area is each under real-time status to check the inclined of performance first
Margin, wherein the initiation value degree of deviation, the sensitivity degree of deviation and III of Distance section hide the load-bearing capacity degree of deviation can be directly according to formula
It seeks, and the selective degree of deviation is related with the cooperation that adjacent legs are protected, and it is fixed need to calculate first this protection from the whole network angle
The selective degree of deviation being worth under the definite value area cooperation of area and each cooperation branch, then according to degree of deviation when cooperating with adjacent legs
It chooses optimal definite value district's groups to close, and then brings each degree of deviation into formula of variance and choose the smallest definite value area of the degree of deviation as in real time
Definite value area under state, detailed process are shown in Fig. 1.
(1) definite value under shifting gears is calculated using adjusting software；
(2) the breaker number of establishing protection is m, then protective device number is 2m；
(3) setting every covering device, there are four definite value areas；
(4) definite value in each definite value area of computing device and the initiation value degree of deviation of calculated value, the sensitivity degree of deviation and away from
Hide from III section the load-bearing capacity degree of deviation；
(5) the selective degree of deviation of the definite value in computing device definite value area and calculated value and cooperate branch definite value area with it
Optimum combination:
The calculating of the selective degree of deviation is using the first covering device A1 of branch A in the whole network as research object explanation.Assuming that branch
B, C, D and branch A cooperate, and two sets of protective devices on branch B, C, D are denoted as B1, B2, C1, C2, D1 and D2 respectively, due to two sets
Principle protection definite value in protective device is the same, and when calculating the selective degree of deviation, it is research that definite value need to be only protected with first set
Object.Respectively remember branch A first set protection four definite value areas be A11, A12, A13, A14, branch B first set protection
Four definite value areas are B11, B12, B13, B14, and four definite value areas of the first set protection of branch C are C11, C12, C13, C14, branch
Four definite value areas of the first set protection of road D are D11, D12, D13, D14.It is as follows that the selective degree of deviation calculates thinking:
1) selective degree of deviation when branch A definite value area A11 and 1 definite value area B11 of adjacent legs B device cooperates is calculated；
2) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B12 cooperates is calculated；
3) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B13 cooperates is calculated；
4) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B14 cooperates is calculated；
5) with 1) --- 4), calculate the selection sexual deviation in A11 and adjacent legs C, D difference covering device under each definite value area
Degree；
6) with 1) --- 5), calculate A12 (or A13, A14) and adjacent legs B, C, D difference covering device under each definite value area
The selective degree of deviation；
By sharing 4 with what definite value area A11 cooperated known to permutation and combination3Group, then four definite value areas with device A1 match
When conjunction, group amounts to 44Group, then checking the optimal protective device definite value area of the whole network when electric network composition and changes of operating modes
Calculation amount is just very big, and in order to reduce calculation amount, the present invention is directed to device B1, C1, D1 of definite value area A11 and branch B, C, D
All cooperations combination in four definite value areas analyzed, by known to analysis in each combination containing B1j (j=1,2,
3,4), C1j (j=1,2,3,4), D1j (j=1,2,3,4), then verification selectivity before only need first to calculate A11 with
Then B1j, A11 and C1j, degree of deviation when A11 and D1j cooperate take in combination (A11, Bij, Cij, Dij) three to cooperate most
Big value is used as the combination deviation degree, then chooses the smallest one group of combination of the degree of deviation in all combinations as definite value area
The degree of deviation calculates the selective degree of deviation in all definite value areas out branch A in the same way.It is calculated to advanced optimize search
Method, using pruning algorithms, the degree of deviation for first combining calculated first is as the current optimal degree of deviation, for next
Combination then directly gives up the combination when any one degree of deviation in combination is greater than the current optimal degree of deviation, if next group
The each degree of deviation closed both less than is equal to the current optimal degree of deviation, then chooses the maximum deviation degree in the combination in three degrees of deviation
As the current optimal degree of deviation, successively scan for, final choice goes out the optimal selective degree of deviation.By introducing pruning algorithms
Search efficiency is substantially increased, the optimal selectivity towards degree of deviation and the optimal degree of deviation that can obtain each definite value area faster are corresponding
Optimum combination.
(6) it if definite value area number is less than 4, returns (4), otherwise executes (7)；
(7) by the initiation value degree of deviation, the sensitivity degree of deviation and III of Distance section hide the load-bearing capacity degree of deviation and selection sexual deviation
Degree brings formula, the corresponding variance index of computing device into；
(8) the corresponding definite value area of device under selection real-time mode is closed according to variance minimum and profile error definite value district's groups；
(9) it if device number is less than 2m, returns (4), otherwise executes (10)；
(10) terminate.
The prior art is only applicable to the online check in single definite value area, does not consider the online check in more definite value areas, and this hair
The bright online check that more set definite values can be achieved, and the definite value area met under actual operating is provided, the switching in given value area mentions
Aid decision has been supplied, the reliability of operation of power networks is increased.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, it is all according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, still belong to the present invention
The protection scope of technical solution.
Claims (4)
1. a kind of online method for checking more set definite values, it is characterised in that: the following steps are included:
(1) definite value under shifting gears is calculated using synchronizing calculation method；
(2) the breaker number of establishing protection is m, then protective device number is 2m, and m is positive integer；
(3) setting every covering device, there are four definite value areas；
(4) the initiation value degree of deviation, the sensitivity degree of deviation, III of Distance of the definite value in each definite value area of computing device and calculated value
Section is hided the load-bearing capacity degree of deviation；
(5) the selective degree of deviation of the definite value in the definite value area of computing device and calculated value and cooperate branch definite value area most with it
Excellent combination；
(6) if definite value area number is less than 4, return step (4) is no to then follow the steps (7)；
(7) the initiation value degree of deviation, the sensitivity degree of deviation and III of Distance section are hided the load-bearing capacity degree of deviation and selective degree of deviation band
Enter formula (1), the corresponding variance index of computing device
Wherein I indicates that the sum of the definite value item stadd of verification initiation value, J indicate that the definite value item reldd's of verification reliability is total
Number, K indicate that the sum of the definite value item sendd of verification sensitivity, L indicate the sum of the definite value item seldd of verification selectivity, M table
Show that the sum of the definite value item disdd of III section of load-bearing capacity of hiding of checking distance, n indicate the total number of definite value item in device；
(8) the corresponding definite value area of device under selection real-time mode is closed according to variance minimum and profile error definite value district's groups；
(9) if device number is less than 2m, return step (4) is no to then follow the steps (10)；
(10) checking terminates.
2. the method that online check according to claim 1 covers definite value more, it is characterised in that: the step of this method in (5),
Respectively remember branch A first set protection four definite value areas be A11, A12, A13, A14, branch B first set protection four
Definite value area is B11, B12, B13, B14, and four definite value areas of the first set protection of branch C are C11, C12, C13, C14, branch D
First set protection four definite value areas be D11, D12, D13, D14, the step (5) include it is following step by step:
(5.1) selective degree of deviation when branch A definite value area A11 and 1 definite value area B11 of adjacent legs B device cooperates is calculated；
(5.2) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B12 cooperates is calculated；
(5.3) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B13 cooperates is calculated；
(5.4) selective degree of deviation when branch A definite value area A11 and adjacent legs B definite value area B14 cooperates is calculated；
(5.5) the selective degree of deviation in each definite value area under A11 and adjacent legs C, D difference covering device is calculated；
(5.6) calculate A12 or or A13 or A14 and adjacent legs B, C, D difference covering device under each definite value area selection sexual deviation
Degree.
3. online check according to claim 2 more cover definite value method, it is characterised in that: in the step (5) A11 with
All contain B1j, C1j, D1j in all cooperations combination in four definite value areas of device B1, C1, D1 of branch B, C, D, is selected in verification
Only need first to calculate A11 and B1j, A11 and C1j before selecting property, degree of deviation when A11 and D1j cooperate, then take combination (A11,
B1j, C1j, D1j) in three cooperation maximum values as the combination deviation degree, wherein j=1,2,3,4 then choose all groups
It is all to calculate out branch A in the same way for the degree of deviation of the smallest one group of combination of the degree of deviation as a definite value area in conjunction
The selective degree of deviation in definite value area.
4. the method that online check according to claim 3 covers definite value more, it is characterised in that:
Pruning algorithms are used in the step (5), the degree of deviation for first combining calculated first is as current optimal inclined
Margin then directly gives up this when any one degree of deviation in combination is greater than the current optimal degree of deviation for next combination
Combination chooses three deviations in the combination if each degree of deviation of next combination is both less than equal to the current optimal degree of deviation
Maximum deviation degree in degree successively scans for, final choice goes out the optimal selective degree of deviation as the current optimal degree of deviation.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6696841B2 (en) * | 2002-03-28 | 2004-02-24 | Eaton Corporation | Electric power system relay and on-line method of testing same |
| CN102290800A (en) * | 2011-08-12 | 2011-12-21 | 华东电网有限公司 | Method for checking relay protection setting |
| 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 |
-
2016
- 2016-02-18 CN CN201610089772.6A patent/CN105678019B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6696841B2 (en) * | 2002-03-28 | 2004-02-24 | Eaton Corporation | Electric power system relay and on-line method of testing same |
| CN102290800A (en) * | 2011-08-12 | 2011-12-21 | 华东电网有限公司 | Method for checking relay protection setting |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 电力系统继电保护定值的在线校核;陈潇 等;《城市建设理论研究（电子版）》;20150831;第5卷(第22期);3695-3696 |
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