CN106529030B - The border search method of last breaker - Google Patents
The border search method of last breaker Download PDFInfo
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- CN106529030B CN106529030B CN201610985416.2A CN201610985416A CN106529030B CN 106529030 B CN106529030 B CN 106529030B CN 201610985416 A CN201610985416 A CN 201610985416A CN 106529030 B CN106529030 B CN 106529030B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
Abstract
The invention discloses a kind of border search methods of last breaker, from the angle of mathematical set, by inverter can operating condition regard a big collection, and big collection is decomposed into six small sets, first write out the expression formula of each small set, recombinant obtain can operating condition expression formula.With whether meet can operating condition expression formula, clearly and simply dividing operating condition and can may not operate operating condition.If certain operating condition meet can operating condition expression formula, but breaker that one was closed originally separate after no longer meet can operating condition expression formula, then current working is determined as critical operating condition, current breaker is last breaker.Above procedure can all give a set of program and be automatically performed, and participate in without artificial, improve the efficiency and reliability of last breaker search.
Description
Technical field
The present invention relates to technical field of power systems, and in particular to a kind of border search method of last breaker.
Background technique
The alternating-current field of existing DC engineering is generally double female 3/2nds wiring for containing multiple exchange strings, can pass through every string
Three breaker interval (each disconnecting switch containing a breaker and its both sides) connection inverters, alternating current circuit, exchange filters
The equipment such as wave device, bus.When connected equipment increases, the quantity for exchanging string can also increase, and the back brake operating condition constituted will be at finger
Number increases, if there is N number of breaker interval, there is 2NKind back brake operating condition.
Under certain back brake operating condition, if one of breaker separates, will lead to inverter lose all current paths and
It stops transport, then the breaker is last breaker, which is the critical back brake operating condition between DC operation and stoppage in transit.
In order to avoid mistakenly separating last breaker and direct current being caused to be latched, need to friendship in critical back brake operating condition
Interlock logic is arranged in each breaker interval in flow field.
The way of setting interlocking at present is: artificially finding out all critical back brake operating conditions and last breaker therein, so
Every kind of critical back brake operating condition is all write a Duan Chengxu (tens even several hundred sections of programs) afterwards；When critical back brake work occurs in alternating-current field
Condition, meets procedure condition, then locks last breaker therein.
This method needs a large amount of artificial subjective judgement, and efficiency is extremely low, and judging result is very unreliable；It needs
Each critical operating condition is programmed, write tens even several hundred sections of programs, lead to the huge cumbersome fallibility of program；It can not search for automatically
All last breakers out, can not form locking sheet, without availability.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of border search method of last breaker,
To improve the search efficiency and accuracy of last breaker and critical operating condition.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of border search method of last breaker, comprising steps of
The model of alternating-current field to be searched is established, which includes the exchange string of each double female 3/2nds wiring；
According to the exchange field model established, C1, C2, D1, D2, M1 and M2 six is expressed with the division state of each breaker
A event, to the expression formula Г of six eventsC1、ГC2、ГD1、ГD2、ГM1And ГM2It is combined, obtaining inverter can run
The expression formula Г of operating condition set BB:
C1=inverter is connected to bus 1；
C2=inverter is connected to bus 2；
At least one alternating current circuit D1=is connected to bus 1；
At least one alternating current circuit D2=is connected to bus 2；
Two buses of M1=do not connect；
Two buses of M2=have connection；
B=M1 ∩ (C1 ∩ D1 ∪ C2 ∩ D2) ∪ M2 ∩ (C1 ∪ C1) ∩ (D1 ∪ D2)
ΓB=(ΓM1)&(ΓC1&ΓD1+ΓC2&ΓD2)+ΓM2&(ΓC1+ΓC2)&(ΓD1+ΓD2)
All operating conditions of the alternating-current field model are traversed, judge whether current working meets expression formula ГB, will if meeting
Division is primary one by one for the breaker being closed under the operating condition, and judges whether no longer meet expression formula Г after separatingBIf no longer full
Foot, then current working is critical operating condition, which is last breaker.
Compared with prior art, the beneficial effects of the present invention are:
The present invention from the angle of mathematical set, by inverter can operating condition regard a big collection, and will collect greatly
Conjunction is decomposed into six small sets, first writes out the expression formula of each small set, recombinant obtain can operating condition expression formula.To be
No satisfaction can operating condition expression formula, clearly and simply dividing operating condition and can may not operate operating condition.If certain operating condition meets
Can operating condition expression formula, but breaker that one was closed originally separate after no longer meet can operating condition expression formula, then
Current working is determined as critical operating condition, current breaker is last breaker.Above procedure can all give a set of program
It is automatically performed, is participated in without artificial, improve the efficiency and reliability of last breaker search, it is not necessary to it is even several to write tens again
Hundred Duan Chengxu greatly reduce program complexity and write the probability of mistake.For the alternating-current field of different structure, only need more
Change exchange field model, being equivalent to only need to change external interface signals, expand without change algorithm core, therefore for alternating-current field
Build, be transformed after need to upgrade the work of control protective program, efficiency is very high.
Detailed description of the invention
Fig. 1 is that two breakers of alternating-current field of two 3/2nds wiring of string separate the schematic diagram of operating condition；
Fig. 2 be inverter may not operate operating condition set A and inverter can operating condition set B and operating point distribution shifts show
It is intended to；
Fig. 3 is that all breakers of alternating-current field of two 3/2nds wiring of string are closed the schematic diagram of operating condition；
Fig. 4 is the conversion wiring schematic diagram of operating point when searching for last breaker；
Fig. 5 is the conversion assembly diagram of operating point when searching for last breaker；
Fig. 6 is the automatic generation method flow chart of the last breaker locking sheet based on boundary search.
Specific embodiment
The present invention is further illustrated With reference to embodiment.
If having N number of breaker interval, each breaker interval (letter in double female 3/2nds wiring of direct current system alternating-current field
Claim breaker) division can produce two kinds of operating conditions, then N number of interval can be combined into 2NKind back brake operating condition.
1, last breaker
Under certain back brake operating condition (abbreviation operating condition), if one of breaker separate, will lead to inverter lose it is all
Current path and stop transport, then the breaker be last breaker, the operating condition be DC operation and stop transport between critical back brake operating condition.
As it can be seen that last breaker is exactly that will lead to the breaker of direct current locking in critical back brake operating condition (critical back brake operating condition typically contains
Multiple breakers, wherein there may be not will lead to the non-last breaker of tripping after separating, it is also possible to exist simultaneously it is multiple most
Breaker, or both has afterwards, but at least there is a last breaker).
As an example with the alternating-current field of two 3/2nds wiring of string, as shown in Figure 1, the breaker 5012,5022 of the operating condition
It being separated, remaining is closed, if disconnecting 5021 or 5011 at this time, it can all cause inverter and alternating current circuit 1 to disconnect and be electrically connected,
It loses all current paths and stops transport, therefore 5011 and 5021 be last breaker；But disconnecting 5013 or 5023 all will not shadow
Operation is rung, therefore 5013 and 5023 be not last breaker.
2, critical back brake operating condition mathematical set analysis
Assuming that the collection of all back brake operating conditions is combined into S, then S is complete or collected works, includes 2NThe different back brake operating condition of kind.This 2NKind operating condition
Two major classes can be divided into, one kind is the operating condition of " inverter may not operate (no current access) ", is set as set A, another kind of is the " change of current
Device can run and (have current path) " operating condition, be set as set B.If A includes i operating condition, then B includes (2N- i) a operating condition, at this
(2N- i) in a operating condition, necessarily includes the j containing last breaker critical operating conditions, be left k as without last breaker
It is common can operating condition.Set S, A, B following expression, relationship are as shown in Figure 2:
A={ a1,a2,…,ai}1≤i
B={ b11,b12,…,b1j,b21,b22,…,b2k}1≤j,1≤k
(i.e.)
Because separate a last breaker, can lead to direct current locking, i.e., from can operating condition switch to may not operate operating condition,
It can be considered to only separate a breaker, the transforming relationship (initial state → final states) between the above back brake operating condition is analyzed,
Find out the boundary between set A and set B:
When some may not operate operating condition axA breaker is separated, must be converted into another may not operate operating condition ay；
When some can operating condition (b1x or b2x) breaker is separated, two kinds of situations can be divided into:
1. some critical operating condition b1xFor initial state, it is converted into another critical operating condition b1y(separated is non-last breaker),
Or it is converted into and may not operate operating condition ay(separated is last breaker):
2. some commonly can operating condition b2xFor initial state, being converted into another commonly can operating condition b2y, or be converted into
Some critical operating condition b1y:
By the above transforming relationship it is found that only critical operating condition separates contained last breaker can just be converted into and may not operate
Operating condition (b1x→ay), transition lines can only be in respective set across the boundary of set A and set B, the transition lines of remaining point
Portion, it is unrelated with the boundary of two set.A breaker can be traced in every transition lines, then finding every conversion across A-B set
Line (b1x→b1y), so that it may find all last breakers.
Below as an example with the alternating-current field of 3/2nds wiring of Fig. 3, b is closed with all switches21For initial state:
b21=(5023 close, 5022 close, 5021 close, 5013 close, 5012 close, 5011 close)
In order separate 5012,5022,5013,5011,5021 switch, often separately one switch transforming relationship are as follows:
Wherein the switch number with underscore is exactly the last breaker under the operating condition, as separated b12In last breaker
5011, then cause inverter and alternating current circuit there is no access and be latched stoppage in transit.
3, the principle of boundary search
Example above b22、b11In last breaker (switch number with underscore) be operating condition people according to alternating-current field
It finds out, non-procedure judges are simultaneously found out.
It will be from 2NAll last breakers are automatically found in kind operating condition, according to above set analysis, are equivalent to find
All critical operating points and its across A-B set transition lines (can trace back to some last breaker), can use set A and set
The boundary search process of B is searched automatically.
The method of boundary search first has to the expression formula (need to cover all the points in the set) for establishing set B, then opens
Begin to search for.
3.1 can operating condition expression formula
Set B be can operating condition set, therefore to find cover it is all can operating condition expression formula, can first by
Set B decomposes the combination of multiple small sets, as long as then writing out the expression formula of each small set, then can obtain covering all
Can operating condition expression formula.
The foundation of decomposition is as follows: can the feature of operating condition be that inverter and alternating current circuit have current path, be equivalent to change
Stream device and alternating current circuit must have electrical connection.It is connection carrier with bus, it is ensured that the two has the operating condition of electrical connection can be divided into
Two kinds of situations: when two buses do not connect, inverter and at least one alternating current circuit are connected on same bus；When two buses
When having connection, inverter is connected on bus, and at least one alternating current circuit and bus have connection.
According to above the case where decomposing, following event (gathering) is set:
C1=inverter is connected to bus 1
C2=inverter is connected to bus 2
At least one alternating current circuit D1=is connected to bus 1
At least one alternating current circuit D2=is connected to bus 2
Two buses of M1=do not connect
The anti-collection of M2=M1'(M1)=two buses have connection
Then set B can be analyzed to:
B=M1 ∩ (C1 ∩ D1 ∪ C2 ∩ D2) ∪ M2 ∩ (C1 ∪ C1) ∩ (D1UD2)
Its corresponding expression formula is
ΓB=ΓM1&(ΓC1&ΓD1+ΓC2&ΓD2)+ΓM2&(ΓC1+ΓC2)&(ΓD1+ΓD2)
Γ in formulaBIndicating the expression formula of set B, remaining is similar, " & " expression " and " or "+" expression "or", wherein each
The expression formula of small set all can relatively easily be write out according to the equipment deployment scenarios of different alternating-current fields.
By sub for the exchange field structure of Fig. 3,
The expression formula of each small set can be written:
ΓC1=5021 close
ΓC2=5022,5023 close
ΓD1=(5011 close) or (5021,5022 close)
ΓD2=(5012,5013 close) or (5023 close)
ΓM1=(5011,5012,5013 at least one separate) and (5021,5022,5023 at least one separate)
(ΓM1Expression formula negates)
ΓB=ΓM1&(ΓC1&ΓD1+ΓC2&ΓD2)+ΓM2&(ΓC1+ΓC2)&(ΓD1+ΓD2)
3.2 expression formulas and boundary
Due toAnd S=A ∪ B, therefore in the concept of mathematical set, set A and set B is to oppose each other
Relationship, from the perspective of being occurred with event, event A and event B must have one and only one generation.It, must for some operating condition z
If havingThen z ∈ A, vice versa (some operating condition is not that can to run be exactly that may not operate operating condition, is not made an exception), therefore
It is unsatisfactory for expression formula ΓBExpression formula Γ will be metA, it may be assumed that
(ΓBExpression formula negates)
Using this point, as certain operating point b of set BxIn separate some breaker when, lead to ΓBBecomeThat is ΓB
Become ΓA, then the operating point is critical operating condition, which is last breaker.
This is because bxCentainly meet ΓB, after separating some breaker, if bxIt is converted into by, then byAlso meet
ΓB；Only bxIt is converted into ay, then ayΓ can be just unsatisfactory forB.Make bxIt is converted into ayTransition lines be exactly last breaker.
It can be seen that can only make ΓBBecomeOperating condition be just in the boundary of set A He set B, if finding institute
There is such critical operating condition, so that it may the shape on boundary is sketched the contours of by its across A-B set transition lines.
The step of 3.3 search
As long as having write out ΓA, can judge each operating point be belong to can operating condition, still fall within and may not operate work
Condition, while may search for can last breaker in operating condition.
Overall search process is divided into two steps:
1. traversing all operating points: allowing program automatically all switch combinations (2NIt is a) operating condition all enumerates one time, each
Operating point all judges whether to meet expression formula ΓB, meet then for can operating condition, be unsatisfactory for, to may not operate operating condition.
2. searching for last breaker: because being likely to be last open circuit in the breaker that can each close in operating condition
Device, thus when judge certain operating condition be can operating condition when, program starts to search for last breaker therein, i.e., will wherein originally
Division is primary one by one respectively for the breaker closed, judges whether new operating condition meets Γ when separatedBIf being unsatisfactory for ΓB, then full
Sufficient ΓA(i.e. ΓBBecome), which is last breaker.
The example of Fig. 1 is quoted, with b11For initial state operating condition, start search wherein last breaker, one by one division 5011,
5021,5013,5023, use b11It is separately converted to a3、a4、b12、b13, as shown in Figure 4:
Know b115011 or 5021 are separated, new operating condition meetsThen 5011,5021 be last breaker, can be gradually with this
The boundary (setting vertical with boundary across set transition lines) of set A and set B is sketched the contours of, as shown in Figure 5.
4, the algorithm flow of locking sheet is automatically generated
4.1 locking sheet
Interlocking is exactly when there is certain operating condition, and lock onto target equipment is allowed to operate.Simple interlocking such as a knife
The operator of lock and the interlocking of its earthing then block operator by mechanical structure when earthing closes, and are allowed to close.
However, between all breakers of alternating-current field be arranged interlocking, logic is very complicated, between distance it is also far, mechanical structure can not be passed through
It is interlocked.
The way of setting interlocking at present is: artificially finding out all critical back brake operating conditions and last breaker therein, so
Every kind of critical back brake operating condition is all write a Duan Chengxu afterwards；When the critical back brake operating condition of alternating-current field appearance, meets procedure condition, then lock
Fixed last breaker therein.
This method is based on artificial lookup so that all operating conditions can not be traversed, and covers all operating conditions so cannot be automatically generated
Last breaker locking sheet.By the method for the above boundary search, traverse all operating conditions, can allow program search out automatically it is all most
Breaker and all critical operating conditions afterwards, so as to form locking sheet.
As long as there is locking sheet, so that it may the system that table imports converter station field control protection, alternative existing tens
Even several hundred sections of programs, make system table look-up and judge current alternating-current field operating condition, without complicated huge decision logic.On the other hand,
Locking sheet can be consulted convenient for field operator and be used, and provide foundation and guarantee for manual back brake.
4.2 establish the call number of operating condition
The content of back brake operating condition is the division information of N number of breaker.Judge currently if Control protection system is tabled look-up every time
The back brake operating condition of alternating-current field will check the division information of N number of breaker, then running efficiency of system is very low, similarly, operations staff
Using also not convenient.The call number for establishing each operating condition, can solve this problem.
Assuming that it is 1 that breaker, which closes, it is split up into 0, then N number of breaker division information of each operating point can regard one as
Binary number.As long as converting decimal number for binary number, so that it may which this represents the operating point.Originally N number of information is checked
Become that only a number need to be checked, then the efficiency that system is tabled look-up can be relatively high, is also convenient for operations staff's use.
Such decimal number is the call number of operating condition.Such as:
b12=(5023 close, 5022 points,5021Close, 5013 points, 5012 points,5011Close)=101001=41
4.3 algorithm flow
Initialization procedure:
(a) alternating-current field structure initialization: the string number of 3/2nds wiring is set in a program and each node is connected
Equipment (equipment such as inverter, alternating current circuit, alternating current filter, bus), to generate the model of alternating-current field to be searched.
(b) automatically generate expression formula: according to the content of above (2.1 section) small set (it is required that), programming automatic generation is each small
The expression formula Γ of setC1、ΓC2、ΓD1、ΓD2、ΓM1、ΓM2, then combination obtain can operating condition expression formula ΓB。
Boundary search process:
(c) operating condition judgement (first stage): whether certain operating condition of procedure judges meets ΓB。
(d) last breaker judgement (second stage): if the operating condition meets ΓB, then need further will wherein close originally
Breaker respectively one by one division it is primary, and when separated call " operating condition judgement " code, if becoming being unsatisfactory for ΓB(i.e. ΓB
Become), then the operating condition is critical operating condition, which is last breaker.
(e) boundary search: the code starting position of " operating condition judges (first stage) " is jumped to, another operating condition is carried out
Judgement, and loop through all operating conditions (2NIt is a).
Locking sheet generating process:
(f) it establishes call number: call number is established to all critical operating conditions found.
(g) tabular is handled: establishing table, each call number is a line of table, and each breaker is a column of table.
Last breaker contained by each critical operating condition is just in corresponding ranks infall mark.
The above process a to g is exactly that last breaker locking sheet automatically generates process, as shown in Figure 6.
Key technical feature and its bring of the invention has the beneficial effect that:
(1) the mathematical set analysis of critical back brake operating condition is described: it is pioneering to be analyzed from the angle of mathematical set, it will fall
Lock operating condition is divided with the angle in meeting point, can understand divide may not operate operating condition, can operating condition (containing critical back brake work
Condition, commonly can operating condition), while operating condition conversion process visually being showed in set figure with transition lines, to take off
The relationship for having shown critical operating condition, last breaker and the boundary set A-B, obtains judging the method for last breaker with this.
(2) describe the principle of boundary search: propose by can operating condition set B resolve into the idea of small set, and write
The content of each small set out.Each small set is combined into set B, on this basis, extrapolating can operating condition by set operation
Expression formula ΓB。
It is antagonistic relations each other according to set A and set B, extrapolates(one is separated in conjunction with the conversion of operating point
A breaker), with ΓBVariation search set A and set B boundary.The step of search has been described in detail simultaneously includes traversal
All operating points and the method and steps for searching for last breaker.
(3) it describes the algorithm flow for automatically generating locking sheet: proposing to establish the idea and method of the call number of operating condition, with
Based on this, description automatically generates the process of last breaker locking sheet, including initialization procedure, boundary search process, interlocking
Table production process.
The method that the present invention uses boundary search first determines last breaker, regenerates locking sheet, possessed advantage is such as
Under:
(1) in program search boundary process, last breaker is judged automatically out, it is whole artificially to judge, it greatly improves
The reliability of Control protection system.
(2) program based on this method can automatically generate one simply can operating condition expression formula, without artificially writing
Tens even several hundred sections of programs substantially reduce program complexity and write the probability of mistake.
(3) program versatility is high, for the alternating-current field of different structure, need to only change " the exchange field structure in algorithm flow
The code of initialization ", quite need to only change external interface signals, without change algorithm core, therefore alternating-current field is extended, is changed
Need to upgrade the work of control protective program after making, efficiency is very high.
(4) locking sheet of last breaker is made control protective program be tabled look-up with the call number of current working, quickly joined
Last breaker is locked, than the method for interlocking is arranged at present more rapidly, more effectively.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and the embodiment is not to limit this hair
Bright the scope of the patents, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case.
Claims (4)
1. a kind of border search method of last breaker, which is characterized in that comprising steps of
The model of alternating-current field to be searched is established, which includes the exchange string of each double female 3/2nds wiring；
According to the exchange field model established, six things of C1, C2, D1, D2, M1 and M2 are expressed with the division state of each breaker
Part, to the expression formula Г of six eventsC1、ГC2、ГD1、ГD2、ГM1And ГM2It is combined, obtaining inverter can operating condition
The expression formula Г of set BB:
C1=inverter is connected to bus 1；
C2=inverter is connected to bus 2；
At least one alternating current circuit D1=is connected to bus 1；
At least one alternating current circuit D2=is connected to bus 2；
Two buses of M1=do not connect；
Two buses of M2=have connection；
B=M1 ∩ (C1 ∩ D1 ∪ C2 ∩ D2) ∪ M2 ∩ (C1 ∪ C1) ∩ (D1 ∪ D2)
ΓB=(ΓM1)&(ΓC1&ΓD1+ΓC2&ΓD2)+ΓM2&(ΓC1+ΓC2)&(ΓD1+ΓD2)
All operating conditions of the alternating-current field model are traversed, judge whether current working meets expression formula ГB, by the work if meeting
Division is primary one by one for the breaker being closed under condition, and judges whether no longer meet expression formula Г after separatingBIf no longer meeting,
Current working is critical operating condition, which is last breaker.
2. the border search method of last breaker according to claim 1, which is characterized in that further comprise the steps of:
Call number is arranged in critical operating condition each to gained, establishes table, and each call number is a line of table, and each breaker is
One column of table are marked in corresponding ranks infall, obtain to the end to last breaker contained by each critical operating condition
The locking sheet of breaker.
3. the border search method of last breaker according to claim 2, which is characterized in that
The closed state of breaker is expressed as 1, separated position is expressed as 0, then the corresponding binary number of each critical operating condition,
Binary number is converted into decimal number, obtains the call number.
4. the border search method of last breaker according to claim 3, which is characterized in that further comprise the steps of:
The Control protection system that the locking sheet is imported to converter station is searched when Control protection system and determines that current working is critical
When operating condition, the corresponding last breaker marked in the locking sheet is locked.
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| CN201610985416.2A CN106529030B (en) | 2016-11-09 | 2016-11-09 | The border search method of last breaker |
| PCT/CN2016/111523 WO2018086199A1 (en) | 2016-11-09 | 2016-12-22 | Border search method for final circuit breaker |
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| CN201610985416.2A CN106529030B (en) | 2016-11-09 | 2016-11-09 | The border search method of last breaker |
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| CN109659913B (en) * | 2018-12-28 | 2020-03-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Last circuit breaker identification method based on virtual circuit network |
| CN110137911B (en) * | 2019-06-03 | 2021-01-29 | 西南交通大学 | Valve group final circuit breaker identification method based on Dijkstra algorithm |
| CN115268937B (en) * | 2022-09-27 | 2023-02-17 | 中国空气动力研究与发展中心计算空气动力研究所 | Multi-phase flow field initialization method, device, equipment and medium |
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