CN110460037A - Line-change of the twinshot cable power distribution network mode of connection-abnormal discrimination method of table topology - Google Patents
Line-change of the twinshot cable power distribution network mode of connection-abnormal discrimination method of table topology Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
A kind of line-change of the twinshot cable power distribution network mode of connection-abnormal discrimination method of table topology, belongs to line loss control field.Its discrimination method includes: to carry out line loss per unit anomaly analysis to the first line n and the second route m of mutual backup；The case where same the first and second table of user and same power distribution station 1 and No. 2 distribution transforming tables are filtered out from the sale of electricity side electricity of first line n and the second route m, does exchange test；It is split for the line construction of first line n and the second route m, and combined circuit line loss per unit situation and figure switch state, carries out electricity reduction test；According to doubtful mistake set, live investigation and defect elimination are carried out for first line n or the second route m.It can intuitively reflect the topological abnormal influence to every route line loss per unit, can be used for prejudging abnormal cause；It can effectively judge abnormal cause, applicability with higher.It can be widely used for the line loss monitoring field in Operation of Electric Systems.
Description
Technical field
The invention belongs in Operation of Electric Systems line loss control field more particularly to a kind of twinshot cable power distribution network connect
Line-change of the line mode-abnormal discrimination method of table topology.
Background technique
Electricity and line loss per unit are power grid enterprises' core business indicators, are the most heavy of intuitive reflection power department income and cost
The data wanted, especially line loss per unit index comprehensive reflect the loss of each link in operation of power networks, concentrated reflection production, scheduling, battalion
The management level of every core business such as pin.
Line loss per unit is the important economic and technical index of one of Utilities Electric Co..The line loss per unit of 10kV separated time usually [-
It 1%, 6%] is considered reasonable in range.
In recent years, with the continuous improvement of electric energy meter coverage rate and the topological data level of informatization, guaranteeing for sale of electricity side
In the case that the metering electricity of use is all the same period, Guo Wang company carries out " subregion, partial pressure, separated time, Fen Tai comprehensively
The work of area " same period Controlling line loss.
Wherein the work of 10kV separated time line loss analyzing is an important content of Controlling line loss work, nets one mainly around state
Change electricity and line loss management system of local electric network come what is carried out, analyzed by the route unreasonable to line loss per unit, finds out line loss per unit exception
Reason, and defect elimination is administered in time.Have at present a small amount of document from the angle of management give line loss per unit anomaly analysis process and from
Reason strategy, but all lack quantitative analysis, be constructed without corresponding mathematical model and propose specific processing method.
When the same period statistical value of 10kV separated time line loss per unit calculates, electric power is derived from for sale of electricity side line-change-table topological relation
Production management system (Production Management System, PMS).But since synchronous abnormality, system defect, personnel dredge
The factors such as suddenly may cause the topological relation in PMS system and exist abnormal, not only influence the calculating of line loss per unit, be also relate to
The safety of on-site personnel.Consider that the sale of electricity side apparatus that part separated time is related to is more, abnormal conditions are complicated simultaneously, only by existing
Investigation is difficult, and also lacks the research in terms of line-change-table topology anomaly analysis at present.
Meanwhile it is a major reason for causing separated time line loss per unit statistical value as negative value that supply side metering is abnormal, it is contemplated that
It is more to measure abnormal cause, only investigation is difficult by scene.
In addition, 10kV power distribution network includes aerial net and cable system, as inner city overhead line enters the continuous depth of ground engineering
Enter, cable power distribution network accounting is higher and higher.In the cable power distribution network mode of connection, the twinshot mode of connection is a kind of basic connects
Line mode, it is very widely used.
In actual operation, in order to improve scene investigation efficiency, there is an urgent need to one kind can measure abnormal front and back line loss per unit
Variation relation, and combined data analysis and failure anticipation, propose the abnormal discrimination method of metering, enable related personnel existing
Before the investigation of field, possible abnormal cause is analyzed, the accuracy of on-site verification is promoted.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of line-change-tables of twinshot cable power distribution network mode of connection
Topological exception discrimination method.Its cable power distribution network mode of connection for being directed to twinshot is based on separated time line loss per unit calculation formula, analysis
Influence of the topological exception to line loss per unit has found corresponding topological Exception Type；It is abnormal to propose a kind of line-change-table topology
Discrimination method.By deriving line loss per unit actual value and the relational expression of statistical value in the case of different Exception Types and being applied,
The objectivity that ensure that analysis result improves scene investigation efficiency and prejudges out abnormal cause before capable of verifying at the scene.
The technical scheme is that line-change-table the topology for providing a kind of twinshot cable power distribution network mode of connection is abnormal
Discrimination method, the statistics and calculating for carrying out line loss per unit including carrying out 10kV separated time in the work of daily power supply management, it is characterized in that:
For the power supply branch of the twinshot cable power distribution network mode of connection, when abnormal feelings occurs in the statistical value of separated time line loss per unit
When condition, for the 10kV separated time, recognized according to there are line-change-table topology abnormal conditions, and then really find this
There is the reason of abnormal conditions in 10kV separated time line loss per unit statistical value；
Specifically, it is as follows to line-change-abnormal identification process of table topology:
Step 1: first line n and the second route m to mutual backup carry out line loss per unit anomaly analysis, if first line n
Or second route m partial line route loss rate it is unreasonable, the case where existing simultaneously negative wire damage, but by first line n and the second line
The line loss per unit that road m is counted after being packaged with is reasonable, then explanation may the separated time road there is line-change-table topology abnormal problem,
Go to step 2；
Step 2: filtering out same user's first from the sale of electricity side electricity of the first line n and the second route m of mutual backup
The case where second table and same power distribution station 1 and No. 2 distribution transforming tables, exchange test is done, if route line loss per unit is reasonable after reduction, then it represents that
There may be change-table Topology Errors, are stored in doubtful mistake set；
Step 3: the line construction of first line n and the second route m for mutual backup are split, and combined circuit
Line loss per unit situation and figure switch state carry out electricity reduction test, if route line loss per unit is reasonable after the reduction of certain type of error,
It then indicates to be stored in doubtful mistake set there may be this mistake；
Step 4: gathering according to doubtful mistake, carry out live investigation and defect elimination for first line n or the second route m.
Specifically, the calculation formula of the 10kV separated time line loss per unit is as follows:
In formula: βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i
Sale of electricity side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter.
Further, the unreasonable line loss per unit for referring to 10kV separated time of the line loss per unit has exceeded the model of [- 1%, 6%]
It encloses.
Further, the exchange test is carried out according to following calculate:
Wherein, βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i
Sale of electricity side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter；W′P1With W 'P2
Respectively correspond the electricity of same No. 1 and No. 2 distribution transforming of power distribution station.
Line-change-table topology abnormal conditions described in it include:
1) change-table topology is abnormal；
2) wiring error；
3) scene and PMS figure switch state are inconsistent.
Specifically, the change-table topology is abnormal, refer to the electricity W ' for respectively corresponding the A and B, lists of same userA1
With W 'A2, since change-table relationship of the two tables is anti-, i.e. the first table electricity W ' of party A-subscriberA1A use has been arrived by erroneous association
The second table electricity W ' at familyA2, and the second table electricity W ' of party A-subscriberA2Party A-subscriber's first table electricity W ' has been arrived by erroneous associationA1。
Specifically, the wiring error refers to first line Lr1Misconnection has arrived second switch KIr2, the second route Lr2It is wrong
It has been connected to first switch KIr1。
Specifically, the described scene and PMS figure switch state are inconsistent, refer to scene autotomy protection act and on figure
Or normal operating conditions are either to autotomy protection act state and scene is normal operating conditions on figure.
Line-change of the twinshot cable power distribution network mode of connection described in the technical solution of the present invention-abnormal identification side of table topology
Method, when first line n line loss per unit is that the second route m line loss per unit is larger positive value or the second route m line loss per unit to negative value simultaneously
When first line n line loss per unit is larger positive value simultaneously for negative value, it is different can be judged as that line-change-table topology occurs in the separated time road
Reason condition.
Compared with the prior art, the invention has the advantages that
1. the abnormal front and back line loss per unit variation relation formula of the topology that technical solution of the present invention is derived can intuitively reflect topology
The abnormal influence to every route line loss per unit, can be used for prejudging abnormal cause；
2. being directed to the twinshot cable power distribution network mode of connection, corresponding topological Exception Type is refined, and derived difference
The relational expression of line loss per unit actual value and statistical value in the case of Exception Type, and then propose a kind of line-change-abnormal identification of table topology
Method；
3. line-the change proposed-abnormal discrimination method of table topology can effectively judge abnormal cause, with higher
Applicability.
Detailed description of the invention
Fig. 1 is the schematic diagram of the twinshot mode of connection；
Fig. 2 is the supply district schematic diagram of the twinshot mode of connection；
Fig. 3 is the grid structure schematic diagram of cable power distribution network in embodiment.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
When the same period statistical value of 10kV separated time line loss per unit calculates, PMS is derived from for sale of electricity side line-change-table topological relation
(Production Management System, power production management) system.But due to synchronous abnormality, system defect, personnel
There is exception, not only influence the calculating of line loss per unit, also relationship in the factors such as carelessness, the topological relation that may cause in PMS system
To the safety of on-site personnel.
Simultaneously, it is contemplated that the sale of electricity side apparatus that part separated time is related to is more, abnormal conditions are complicated, only by scene investigation difficulty
It is very big.
In addition, 10kV power distribution network includes aerial net and cable system, as inner city overhead line enters the continuous depth of ground engineering
Enter, cable power distribution network accounting is higher and higher.In the cable power distribution network mode of connection, twinshot is a kind of basic mode of connection,
It is very widely used, it is therefore desirable to give primary study.
One, line-change-abnormal influence to line loss per unit of table topology:
The calculation formula of 10kV separated time line loss per unit is as follows:
In formula: βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i
Sale of electricity side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter.For route n,
The public change of its sale of electricity side or special power transformation amount W ' originally belong to Wnj, but since exception occurs in PMS middle line-change-table topological relation, it leads
W ' is caused to be attributed to W in line loss per unit calculatingmj, i.e. in route m.The line loss per unit that will lead to route n in this way obviously increases, even
More than zone of reasonableness；And the line loss per unit of route m significantly reduces, it may appear that the case where negative wire is damaged.Above-mentioned phenomenon readily occurs in electricity
In cable power distribution network in the mode of connection of mutual backup.This situation occurs, it is necessary to carry out analysis and defect elimination.
Lower mask body analyzes line-change-table topology abnormal conditions that the twinshot mode of connection is likely to occur.
In Fig. 1, the schematic diagram of the twinshot mode of connection is given, is by pressing bus to draw double-circuit line, shape in difference
At dijection wiring.Wherein, KnAnd KmRespectively correspond the outlet switch of first line n and the second route m, Kr2It is up mode
Under open loop point.
When using the twinshot mode of connection, block switch K will increase under partial pictureZ1、KZr、KZR, and be furnished with and autotomy guarantor
Protective function.When any line fault, protection act is autotomyed, it can will be on load transfer to another route.
For the twinshot mode of connection, occur there are mainly two types of line-change-table topology abnormal conditions: one is wiring error,
That is first line Lr1Mistake has been connected to second switch Kr2, the second route Lr2Mistake has been connected to first switch Kr1；Another kind is scene
Inconsistent with PMS figure switch state, common type of error is as shown in table 1.
1 switch state type of error of table:
When wiring error and switch state type of error 1 occurs, the electricity W belonged to originally in route n will lead tor' by mistake
It has been associated on route m, has caused the statistical value of route n and m line loss per unit are as follows:
In formula: β 'nWith β 'mThe respectively statistical value of route n and m line loss per unit；βnAnd βmRespectively route n and m line loss per unit
Actual value.
And then it follows that
Similarly, it can derive the relational expression of line loss per unit actual value and statistical value under other switch state type of errors, have
Body is as shown in table 2.
Line loss per unit under the different type of errors of table 2
Can be seen that type of error 1 and 2 to may cause route n line loss per unit by above-mentioned analysis is negative value isochrone road m line
Loss rate be larger positive value, type of error 3 and 4 may cause route m line loss per unit be negative value isochrone road n line loss per unit be it is larger just
Value.
Two, topological anomaly analysis:
For the twinshot mode of connection, occur there are mainly three types of line-change-table topology abnormal conditions: 1) change-table topology is different
Often；2) wiring error；3) scene and PMS figure switch state are inconsistent.
(1) change-table topology is abnormal:
In Fig. 2, W 'r1With W 'r2In may include user, distribution transforming and other loads.
In Fig. 2, W 'A1With W 'A2Respectively correspond the first of same user and the electricity of second table, and the change of the two tables-table relationship
It is likely to be associated with anti-, i.e. W 'A1Party A-subscriber's second has been arrived by erroneous association, and W 'A2Party A-subscriber's first has been arrived by erroneous association, has caused line
The statistical value of road n and m line loss per unit are as follows:
And then it follows that
W′P1With W 'P2Respectively correspond the electricity of same No. 1 and No. 2 distribution transforming of power distribution station, and the change of the two tables-table relationship
Associated errors are likely to, can similarly derive influence of this problem to line loss per unit.
(2) wiring error:
The case where wiring error mainly occurs is: route Lr1Mistake has been connected to switch KIr2, Lr2Mistake has been connected to KIr1.This
Kind mistake causes the actual value of route n and m line loss per unit and the relational expression of statistical value are as follows:
(3) scene and PMS figure switch state are inconsistent:
The reason of causing live situation inconsistent with PMS figure switch state mainly has: autotomying protection act and schemes in scene
In shape or normal operating conditions are either to autotomy protection act state and scene is normal operating conditions on figure.Concrete kind
Type is as shown in table 3.
Switch state under the different type of errors of table 3
When above-mentioned switch state mistake occurs, the relational expression of line loss per unit actual value and statistical value can be derived, specifically such as
Shown in table 4.
Line loss per unit under the different type of errors of table 4
As can be seen from Table 4, it is negative value isochrone road m line loss per unit that type of error 2 and 3, which may cause route n line loss per unit,
For larger positive value, it be negative value isochrone road n line loss per unit is larger positive value that type of error 1 and 4, which may cause route m line loss per unit,.
Three, line-change-abnormal identification process of table topology:
Can be seen that main abnormal reason for the topological anomaly analysis under the twinshot mode of connection includes: change-table topology
Mistake, wiring error, scene and PMS figure switch state are inconsistent.
So as follows to line-change-abnormal identification process of table topology in technical solution of the present invention:
Step 1: line loss per unit anomaly analysis being carried out to the route of mutual backup, if partial line route loss rate is unreasonable, simultaneously
The case where there are negative wire damages, but it is reasonable to be packaged with line loss per unit, then and explanation is likely to occur line-change-table topology abnormal problem, turns
Step 2.
Step 2: filtering out same the first and second table of user and same power distribution station 1 from the electricity of mutual backup route sale of electricity side
Situations such as with No. 2 distribution transforming tables, does exchange test according to formula (7), if route line loss per unit is reasonable after reduction, then it represents that there may be
Change-table Topology Error is stored in doubtful mistake set.
Step 3: being split for mutual backup line construction, and combined circuit line loss per unit situation and figure switch shape
State carries out electricity reduction test according to table 2 and table 4, if route line loss per unit is reasonable after the reduction of certain type of error, then it represents that may
There are this mistakes, are stored in doubtful mistake set.
Step 4: carrying out live investigation and defect elimination according to doubtful mistake.
Instance analysis:
It is standby each other to one group of certain power supply company in order to verify proposed line-change-table topology abnormal discrimination method validity
Route is analyzed.Wherein: all line losses per unit of totally 16 friendship ties switchyard first are -148.91%, totally 57 friendship ties switchyard second
All line losses per unit are 40.16%, and the corresponding specific component information difference in two lines road is as shown in table 5 and table 6.Through analyzing, Liang Tiaoguan
On line damage one positive one is negative, while it is 1.68% that two lines road, which is packaged line loss per unit, is that reasonably, can tentatively judge that there are lines-
Change-table topology is abnormal.
Table 5 totally 16 line loss component information
Table 6 totally 57 line loss component information
The case where analyzing change-table Topology Error first.This group of route is related to 8 power supply users, wherein Beijing Taide and connection
There are the first and second tables for friendship pumping plant, for the two user's points, the line loss after exchanging user's point meter are calculated according to formula (7), to sentence
The disconnected problem anti-with the presence or absence of user's table.Calculated result is as shown in table 7.
7 changes of table-table topological analysis result
It can be seen that by the calculated result of table 7, after exchanging user's meter, totally 16 and totally 57 route line losses are not reasonable.Similarly
Also exchange test has been carried out to distribution transforming, route line loss per unit is also all unreasonable after reduction, and it is different can temporarily to exclude change-table topology appearance
Often, it needs further to carry out it line variable topological analysis.
Fig. 3 is grid structure (also known as power supply topology) schematic diagram of cable power distribution network involved by embodiment.
As shown in the power supply topological diagram of " totally 16 " and " totally 57 " in Fig. 3, wherein solid line is that totally 16 power pack, dotted line are
Totally 57 power pack.
From figure 3, it can be seen that this group of route is related to two twinshot wiring altogether, wherein totally 16 switch supply objects are big
Building case becomes and rich Lane 476 casees become A altogether.Since totally 16 line losses per unit are negative value, according to table 2, each twinshot wiring may be deposited
Be type of error 1.Corresponding line loss per unit after topology is corrected is calculated, as a result as shown in table 8.
8 twinshot wiring topology anomaly analysis result of table
As can be seen from Table 8, the line loss per unit after three kinds of type of error reduction is still unreasonable, and it is super can temporarily to exclude line loss
Mark is caused by monocyclic topology is abnormal.
From the figure 3, it may be seen that the dijection wiring in totally 16 topologys is related to 6 stations altogether, it is friendship ties switchyard, friendship ties road 501 respectively
Do No.1 station, the station of friendship ties road Lane 501 two, friendship ties road Lane 501 three station, the road Gong Fu Lane 476 No.1 station, the road Gong Fu Lane 476 two
Number station.Due to totally 16 line loss per unit be negative value, according to table 4, it can be seen that is be likely to occur is type of error 2.Using from lower and
On analysis method, to 6 stand topology analyze.Calculate corresponding line loss per unit after topology is corrected, concrete outcome such as 9 institute of table
Show.
9 twinshot wiring topology anomaly analysis result of table
According to the analysis of table 9 as a result, judgement anomaly occurs in friendship ties road Lane 501 No.1 station, specific phenomenon are as follows: live K '5
It disconnects, KZ2Closure；Figure K '5Closure, KZ2It disconnects, it is doubtful to cause due to autotomying movement.According to judging result, live progress is gone to
It verifies, live switch K '5Because failure disconnects, movement, block switch K are autotomyed in friendship ties road Lane 501 No.1 stationZ2It closes, leads to friendship ties
Road Lane 501 No.1 station _ No. 1 distribution transforming, rich Lane 476 casees become the road A, Gong Fu Lane 476 two station _ No.1 distribution transforming, friendship ties road Lane 501 two altogether
Number station _ No.1 distribution transforming, friendship ties road Lane 501 three station _ No.1 distribution transforming, the change of building case, Lane 476 No.1 station _ No. 1 distribution transforming of the road Gong Fu,
The station of friendship ties switchyard _ 10 kilovolt 1 is practical by totally 57 power supplies with change, identical as judging result.Field device is restored to normal
After operation conditions, totally 16 and totally 57 two lines damages restore reasonable.
Unreasonable rationally, separately are counted to 67 groups of packing statistical line losses rates using method described in technical solution of the present invention
Route carry out abnormal identification, can accurately find out existing line-topological abnormal cause of change-table, check result such as 10 institute of table
Show, it can be seen that discrimination method described in the technical program has preferable applicability.
Table 10 checks result
To sum up, since line-change-abnormal table topology is a main cause for causing separated time line loss per unit statistical value unreasonable,
Consider that the equipment amount that part separated time is related to is more, abnormal conditions are complicated simultaneously, only investigation is difficult by scene.
In order to overcome this problem, the technical program is directed to the cable power distribution network mode of connection of twinshot, is based on separated time line
Loss rate calculation formula analyzes the topological abnormal influence to line loss per unit, has refined corresponding topological Exception Type, has proposed one kind
Line-change-abnormal the discrimination method of table topology.
Through the above it can be concluded that
1) when line-change-table topology exception occurs for the route of mutual backup, if all routes are packaged with statistics,
Line loss per unit is reasonable；The case where if separately statistics, partial line route loss rate is unreasonable, exists simultaneously negative wire damage；
2) the abnormal front and back line loss per unit variation relation formula of the topology derived can intuitively reflect topological abnormal to every route
The influence of line loss per unit can be used for prejudging abnormal cause；
3) line-change proposed-abnormal discrimination method of table topology can effectively judge abnormal cause, with higher
Applicability.
The implementation of the technical solution ensure that the objectivity of analysis, improves scene investigation efficiency, can verify at the scene
Before, prejudge out abnormal cause.
It invention can be widely used in the line loss monitoring field in Operation of Electric Systems.
Claims (9)
1. a kind of line-change of the twinshot cable power distribution network mode of connection-abnormal discrimination method of table topology, is included in daily for fulgurite
Science and engineering carries out statistics and calculating that 10kV separated time carries out line loss per unit in making, it is characterized in that:
For the power supply branch of the twinshot cable power distribution network mode of connection, when abnormal conditions occurs in the statistical value of separated time line loss per unit
When, it for the 10kV separated time, is recognized according to there are line-change-table topology abnormal conditions, and then really find the 10kV
There is the reason of abnormal conditions in separated time line loss per unit statistical value；
Specifically, it is as follows to line-change-abnormal identification process of table topology:
Step 1: first line n to mutual backup and the second route m carries out line loss per unit anomaly analysis, if first line n or the
The case where partial line route loss rate of two route m is unreasonable, exists simultaneously negative wire damage, but first line n and the second route m are beaten
The line loss per unit counted after being wrapped together is reasonable, then explanation may the separated time road there is line-change-table topology abnormal problem, go to step
2；
Step 2: filtering out same the first and second table of user from the sale of electricity side electricity of the first line n and the second route m of mutual backup
The case where with same power distribution station 1 and No. 2 distribution transforming tables, exchange test is done, if route line loss per unit is reasonable after reduction, then it represents that may
There are change-table Topology Errors, are stored in doubtful mistake set；
Step 3: the line construction of first line n and the second route m for mutual backup are split, and combined circuit line loss
Rate situation and figure switch state carry out electricity reduction test, if route line loss per unit is reasonable after the reduction of certain type of error, table
Show there may be this mistake, is stored in doubtful mistake set；
Step 4: gathering according to doubtful mistake, carry out live investigation and defect elimination for first line n or the second route m.
2. line-change of the twinshot cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that the calculation formula of the 10kV separated time line loss per unit is as follows:
In formula: βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i sale of electricity
Side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter.
3. line-change of the twinshot cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that the unreasonable line loss per unit for referring to 10kV separated time of the line loss per unit has exceeded the range of [- 1%, 6%].
4. line-change of the twinshot cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that the exchange test is carried out according to following calculate:
Wherein, βiFor the line loss per unit of route i；WGiThe metering electricity of kilowatt-hour meter is associated with for route i supply side；WSiFor route i sale of electricity
Side total electricity；WijAnd NiRespectively sale of electricity side public affairs become, specially become the metering electricity and sum for being associated with kilowatt-hour meter；W′P1With W 'P2Respectively
The electricity of corresponding same No. 1 and No. 2 distribution transforming of power distribution station.
5. line-change of the twinshot cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that line-the change-table topology abnormal conditions include:
1) change-table topology is abnormal；
2) wiring error；
3) scene and PMS figure switch state are inconsistent.
6. line-change of the twinshot cable power distribution network mode of connection-abnormal discrimination method of table topology according to claim 5,
It is characterized in that the change-table topology is abnormal, refer to the electricity W ' for respectively corresponding the A and B, lists of same userA1With W 'A2,
Since change-table relationship of the two tables is anti-, i.e. the first table electricity W ' of party A-subscriberA1The second table of party A-subscriber has been arrived by erroneous association
Electricity W 'A2, and the second table electricity W ' of party A-subscriberA2Party A-subscriber's first table electricity W ' has been arrived by erroneous associationA1。
7. line-change of the twinshot cable power distribution network mode of connection-abnormal discrimination method of table topology according to claim 5,
It is characterized in that the wiring error refers to first line Lr1Misconnection has arrived second switch KIr2, the second route Lr2Misconnection is to
One switch KIr1。
8. line-change of the twinshot cable power distribution network mode of connection-abnormal discrimination method of table topology according to claim 5,
It is characterized in that the described scene and PMS figure switch state are inconsistent, refer to scene autotomy protection act and on figure or often
Rule operating status is either to autotomy protection act state and scene is normal operating conditions on figure.
9. line-change of the twinshot cable power distribution network mode of connection described in accordance with the claim 1-abnormal discrimination method of table topology,
It is characterized in that when first line n line loss per unit is that the second route m line loss per unit is larger positive value or the second route m line to negative value simultaneously
When loss rate is negative value while first line n line loss per unit is larger positive value, it can be judged as that the separated time road line-change-table occurs and opens up
Flutter abnormal conditions.
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| CN201910407707.7A Active CN110460037B (en) | 2019-05-16 | 2019-05-16 | Line-to-table topology abnormity identification method for connection mode of bijection type cable distribution network |
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| CN113253014B (en) * | 2021-04-07 | 2022-08-23 | 国网河北省电力有限公司衡水供电分公司 | Method, device and equipment for detecting abnormal topological relation of transformer area subscriber |
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