CN109061541A - A kind of low-voltage platform area electric topology identification system and its working method - Google Patents
A kind of low-voltage platform area electric topology identification system and its working method Download PDFInfo
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Abstract
A kind of low-voltage platform area electric topology identification system and its working method, mesh foreground partition recognition principle is frequently with phase line and the short circuit of middle line short time, carry out voltage over zero signal modulation mode, this scheme is there are phase line and neutral conductor long-time short-circuit risks, the problem of causing equipment burnout or lead to platform area fault outage.The present invention includes: to collect unit: being set to distribution low-voltage side outlet；The identification judgement of platform area, which is carried out, by the characteristic signal on detection bus automatically forms electric topology logical relation by analyzing each node logical relationship；Distribution unit: being connected with unit wireless is collected, and is set to branch point or electricity box side.The technical program is without having a power failure, user under each transformer can be investigated thoroughly with drawing desk area electric topology logical relation, realize that family becomes relationship automatic identification, it can really reflect basic data data under power distribution station, become the basis for realizing smart grid management.
Description
Technical field
The present invention relates to electric topology identification system and method more particularly to a kind of low-voltage platform area electric topology identification systems
And its working method.
Background technique
Low-voltage platform area transformer is there are following Railway Project at present, 1) old area user is routed complicated, data it is incomplete or
Person does not update；2) the adjacent intersection in platform area is created, often there are more transformers in same switchgear house, due to adjacent close, and is same
One group of high voltage bus can not correctly determine that electric supply meter platform area belongs to；3) electric topology configuration data in low-voltage platform area is even more incomplete,
It updates not in time, it, can not rapid fault location when failure.
Therefore a kind of device and method are needed, without having a power failure, can be closed with drawing desk area electric topology logic
System investigates thoroughly user under each transformer, realizes that family becomes relationship automatic identification, can really reflect that basic data provides under power distribution station
Material, this is also the basis for realizing smart grid management.
Platform area electric topology relationship is automatically generated currently without application, realizes the identification of platform area, and mesh foreground partition recognition principle is normal
Using phase line and the short circuit of middle line short time, voltage over zero signal modulation mode is carried out, there are phase lines and the neutral conductor for this scheme
Long-time short-circuit risks, the problem of causing equipment burnout or lead to platform area fault outage.
Summary of the invention
The technical problem to be solved in the present invention and the technical assignment of proposition are to be improved and improved to prior art,
A kind of low-voltage platform area electric topology identification system is provided, to achieve the purpose that automatic accurate generation platform area electric topology relationship.For
This, the present invention takes following technical scheme.
A kind of low-voltage platform area electric topology identification system, comprising:
Collect unit: being set to distribution low-voltage side outlet；Collect unit and passes through wireless collection power distribution station circumferential distribution element address
Distribution unit address is collected in inquiry, and distribution unit movement is allowed to generate reactive current pulse or reactive power as characteristic signal,
The identification judgement of platform area is carried out by the characteristic signal on detection bus, by analyzing each node logical relationship, is automatically formed electrical
Topological logic relationship；
Distribution unit: being connected with unit wireless is collected, and is set to branch point or electricity box side, generation, detection for characteristic signal
And node relationships analysis；By being communicated with electricity box concentrator or user's table, user's table information is obtained, realizes that family becomes relationship and knows
Not, response collects element address querying command, reports address information, and instruct by specified regular quick-switching according to unit is collected
Power capacitor C1 generates the characteristic signal sequence of certain rule.
The technical program can be investigated thoroughly each without having a power failure with drawing desk area electric topology logical relation
User under transformer realizes that family becomes relationship automatic identification, can really reflect basic data data under power distribution station, become realization
The basis of smart grid management.
As optimization technique means: collect the address that unit collects distribution unit in 3 kilometer ranges nearby, collect unit and
Distribution unit carries geographical location information GPS, and equipment can find and register automatically in a network, and when registered network carries its geography
Location information, host find the slave in set distance range according to its geographical location information, are sequentially generated letter to these slaves
It feels the pulse punching, judges whether itself and host belong to an area Ge Tai；Distribution unit is logical by carrying out RS485 with the concentrator in electricity box
News obtain ammeter information under concentrator, realize that family becomes relationship and establishes, set distance range is 1~5 kilometer.
As optimization technique means: after each distribution unit receives this order, according to address difference, within a certain period of time,
Collecting unit successively allows each distribution unit movement to generate characteristic signal sequence, according to the distribution list for collecting unit and each branch point
Whether member detects corresponding characteristic signal sequence, to judge distribution unit platform area's attaching relation and logic pass in front and back between them
System, accurately identifies distribution unit all under platform area, in this way, being repeated several times, identifies newly-increased distribution unit equipment.
As optimization technique means: the distribution unit is equipped with characteristic signal generative circuit, and the characteristic signal is raw
It include power relay J1, power relay J2, power relay J3 and the concatenated silicon-controlled T1 of power relay J3 at circuit
And power capacitor C1, the magnetic latching relay J4, the power relay J1, power relay J2 in parallel with silicon-controlled T1
Series connection, the power relay J2 is in parallel with power relay J3, and the contact of the power relay J1 includes the second touching
Point selects the first contact and third contact that one is electrically connected with the second contact；The contact of the power relay J2 includes the 5th
Contact selects the 4th contact and the 6th contact that one is electrically connected with the second contact, and the contact of the power relay J3 includes the
Seven contacts and the 8th contact that can be electrically connected with the 7th contact；5th contact is electrically connected with the 7th contact, and described
Two contacts are electrically connected with the 4th contact, and first contact, third contact, the 6th contact are connect with phase line；Described the 8th
Contact is electrically connected with silicon-controlled T1；Described one end power capacitor C1 is electrically connected with silicon-controlled T1, the other end and neutral conductor electricity
Connection.The technical program generates pulse train by the way of switched capacitor, and short-circuit risks are not present；Avoid using phase line and
Zero curve short circuit generates pulse train and the short-circuit risks that occur.
As optimization technique means: distribution unit has short circuit current detection, outage information reporting functions and remote signalling amount and adopts
Collect module, killer switch in feeder pillar body is acquired by detection line short circuit current and acquisition remote signalling amount and is conjugated, judges failure
Point position and power failure coverage.
It is a further object to provide a kind of low-voltage platform area electric topology discrimination methods comprising following steps:
1) collect unit in the installation of distribution transforming first end-side, distribution unit is installed in ammeter box and line branch point；
2) after collecting unit starting platform area recognition command, collect unit and start the inquiry of broadcast distribution element address, collect and nearby divide
Cloth element address；
3) distribution unit obtains user's table information, realizes that family becomes relationship and knows by communicating with electricity box concentrator or user's table
Not, it after each distribution unit receives address lookup order, according to address difference, within a certain period of time, staggers the time and reports respectively
Location information；
4) distribution transforming head end collects unit, receives all addresses for returning to distribution units, then issues instruction and successively allows each distribution
Unit movement generates characteristic signal sequence；
5) distribution unit becomes reactive power in power grid according to instruction by specified regular quick-switching power capacitor C1
Change, generates the characteristic signal sequence of certain rule；
6) collect unit and distribution unit detection characteristic signal, whether detected according to the distribution unit for collecting unit and each branch point
Platform is identified to corresponding characteristic signal sequence to judge distribution unit platform area's attaching relation and front and back logical relation between them
All distribution units under area identify newly-increased distribution unit equipment in this way, being repeated several times；Generate platform area electric topology structure.
As optimization technique means: in step 6), collecting unit and each point distribution unit to the characteristic signal detected
Sequence is analyzed, and is determined using pulse train phase knowledge and magnanimity and is received detection signal, and pulse train similarity degree height indicates positive
It closes, i.e., accurately detects signal, the low expression of pulse train similarity degree does not detect corresponding signal.
As optimization technique means: collecting unit sampling starting point using voltage zero-cross mode in the same direction: distribution unit voltage
Zero crossing movement, collects cell voltage zero passage point sampling；Operating point is synchronous with sampled point, with eliminate so that sampling obtain it is idle
The median of value.
As optimization technique means: sample frequency is set as 20ms, with anti-even-order harmonic；When maximum value in the data of interception
When being greater than capacitor input with minimum difference, then it is assumed that have catastrophe point in this group of data, that is, there is external disturbance, it is dry to remove this
A participation is disturbed to calculate.
As optimization technique means: low-voltage platform area topological relation automatic identification uses current detection mode, passes through every distribution
The reactive current pulse train that unit generates detects that corresponding pulse train is believed according to the distribution unit of each branched line
Number, the judgement for carrying out front and back logical relation determines topological network node context and concurrency relation by traversal search algorithm, point
Cloth unit is associated with user's table information to electricity box, can accurately realize entire platform area electric diagram；
When low-voltage platform area is broken down, under the premise of realizing platform area's network topology, by judge branch point switch state or
Whether person breaks down electric current, to determine position of failure point, to promote first-aid repair efficiency, and can analyzing influence number of users, realize
Minute grade, which has a power failure, to be alerted.
The utility model has the advantages that the technical program can automatically generate platform area electric topology, the identification of electric supply meter platform area and event are realized
Barrier positioning, provides data supporting for low-voltage line guard and analysis, can such as support the analysis of low-pressure side line loss lean, low-voltage circuit
Low-voltage distribution network fortune inspection working efficiency can be improved in impedance analysis.
The technical program not by power line channel adverse circumstances, strong noise and it is highly attenuating influenced, it is automatic raw without power-off
At each branch node electric topology logical relation of route.
Detailed description of the invention
Fig. 1 is structure principle chart of the invention.
Fig. 2 is generation characteristic signal sequence electrical schematic diagram of the invention.
Fig. 3 is that platform area of the invention shows arborescence.
Fig. 4 is platform area electric topology figure of the invention.
Fig. 5 is the actual topological diagram in an area of the invention.
Fig. 6 is the electrical relation figure generated according to Fig. 5.
Fig. 7 is action waveforms of the invention.
Fig. 8 is the idle sample waveform of generation of the invention.
Specific embodiment
Technical solution of the present invention is described in further detail below in conjunction with Figure of description.
As shown in Figure 1, the present invention includes:
Collect unit: being set to distribution transforming head end；Collect unit and passes through micropower radio broadcasting power distribution station circumferential distribution element address
Distribution unit address is collected in inquiry, and distribution unit movement is allowed to generate characteristic signal sequence, passes through the characteristic signal on detection bus
Sequence carries out the identification judgement of platform area and automatically forms electric topology logical relation by analyzing each node logical relationship.
Distribution unit: being connected with unit wireless is collected, and is set to branch point or electricity box side, the production for characteristic signal sequence
Raw, detection and node relationships analysis；By being communicated with electricity box concentrator or user's table, user's table information is obtained, realizes family
Become relation recognition, response collects element address querying command, reports address information, and instruct by specified rule according to unit is collected
Quick-switching power capacitor C1, generates the characteristic signal sequence of certain rule.
The technical program can be investigated thoroughly each without having a power failure with drawing desk area electric topology logical relation
User under transformer realizes that family becomes relationship automatic identification, can really reflect basic data data under power distribution station, become realization
The basis of smart grid management.
To avoid that short-circuit risks occur, pulse train is generated by the way of switched capacitor in the technical scheme.Such as
Shown in Fig. 2, the characteristic signal generative circuit of distribution unit, including power relay J1, power relay J2, power relay
J3, with power relay J3 concatenated silicon-controlled T1 and power capacitor C1, the magnetic latching relay J4 in parallel with silicon-controlled T1,
Power relay J1, power relay the J2 series connection, the power relay J2 is in parallel with power relay J3, described
The contact of power relay J1 include the second contact, select the first contact and third contact that one is electrically connected with the second contact；Institute
The contact of the power relay J2 stated includes the 5th contact, selects the 4th contact and the 6th contact that one is electrically connected with the second contact,
The 8th contact that the contact of the power relay J3 includes the 7th contact and can be electrically connected with the 7th contact；Described the 5th
Contact is electrically connected with the 7th contact, and second contact is electrically connected with the 4th contact, first contact, third contact,
6th contact is connect with phase line；8th contact is electrically connected with silicon-controlled T1；Described one end power capacitor C1 with can
Silicon T1 electrical connection is controlled, the other end is electrically connected with the neutral conductor.The technical program generates pulse train by the way of switched capacitor,
Reliable operation is stablized, and short-circuit risks are not present；Avoid the short-circuit wind occurred using phase line and zero curve short circuit generation pulse train
Danger.CTU, by specified regular quick-switching power capacitor, generates the characteristic signal sequence of certain rule, by collecting according to instruction
Corresponding characteristic signal sequence can be detected in unit and each point distribution unit, is determined using pulse train phase knowledge and magnanimity and receives detection
Signal, pulse train similarity degree height indicate to be positively correlated, i.e., accurately detect signal, and the low expression of pulse train similarity degree does not have
Detect corresponding signal.
To avoid causing situations such as losing because of data concentration of transmissions, after each distribution unit receives this order, root
It according to address difference, within a certain period of time, staggers the time and reports respective address information, collect unit and receive the address for returning to distribution unit
Afterwards, it successively allows each distribution unit movement to generate characteristic signal sequence, is according to the distribution unit for collecting unit and each branch point
It is no to detect corresponding characteristic signal sequence, to judge distribution unit platform area's attaching relation and front and back logical relation between them,
Distribution unit all under platform area is accurately identified, in this way, being repeated several times, can recognize newly-increased CTU equipment.Effectively improve the steady of work
It is qualitative.
Low-voltage platform area electric topology discrimination method the following steps are included:
1) collect unit in the installation of distribution transforming first end-side, distribution unit is installed in ammeter box and line branch point；Distribution unit is referred to as
CTU, before carrying out the identification of platform area and topological relation, whether the CTU of each installation point is unknown, topology successively under corresponding platform area
Logical relation is also unknown.
2) after collecting unit starting platform area recognition command, collect unit and start to broadcast CTU address lookup, collect CTU nearby
Address；Collect the address CTU that unit collects nearby about 1 kilometer, using means of communication setting range；Due to distribute-electricity transformer district typical case
Design radius of electricity supply is wireless using LORA micropower no more than 500 meters, can search for CTU equipment at least 1 kilometer.
3) CTU obtains user's table information, realizes that family becomes relationship and knows by communicating with electricity box concentrator or user's table
Not, it after each CTU receives address lookup order, according to address difference, within a certain period of time, staggers the time and respective address is reported to believe
Breath；CTU is by carrying out RS485 communication with the concentrator in electricity box.
4) distribution transforming head end collects unit, receives all addresses for returning to CTU, then issues instruction and successively allows each CTU dynamic
Make generation characteristic signal sequence；
5) CTU makes reactive power in power grid change, generates according to instruction by specified regular quick-switching power capacitor C1
The characteristic signal sequence of certain rule；For distribution unit according to certain rule switched capacitor, the rule is settable, such as puts into
100ms cuts off 100ms, altogether lasting 1S time, collects unit wave recording when starting movement, when the record time is greater than movement
Between, such as 4S., circulation reads the one-off period (interception 1S data) evidence and is compared later.To ensure the accurate of platform area identification
Rate, generates and identification reactive power variation calculates and carries out specially treated.
6) collect unit and CTU detection characteristic signal, whether detected accordingly according to the CTU for collecting unit and each branch point
Characteristic signal sequence, come judge CTU platform area's attaching relation and they between front and back logical relation, identify platform area under it is all
CTU identifies newly-increased CTU equipment in this way, being repeated several times；Generate platform area electric topology structure.First sampling point uses voltage in the same direction
Zero passage mode: the movement of distribution unit voltage over zero collects cell voltage zero passage point sampling.Advantage has voltage over zero ratio in this way
Voltage peak point wants difficult to find；Operating point is synchronous with sampled point so that sampling obtain will not have median without work value, avoid sampling
Silicon-controlled mode puts into capacitor, cause first without work value be median the case where.Sample frequency is set as 20ms, compares 10ms
Sample frequency advantage: can resist even-order harmonic, because the left half-wave of even-order harmonic and right half-wave are asymmetric, and 10ms algorithms
It is to remove half-wave after filling by preceding half-wave, causes not being inconsistent with actual waveform, to influence to judge by accident.It is illustrated in figure 7 action waveforms,
It is illustrated in figure 8 and generates idle sample waveform.If maxima and minima difference is put into greater than capacitor in the data of interception
Value, illustrates there is catastrophe point in this group of data, i.e., so-called external disturbance.Processing mode is to be not involved in this current noise spot
Corresponding to calculate, data are to intercept point by point, citing, it is assumed that share 1000 data in the interception 1S time, be in interception 1s for the first time
Data be 1-1000, second is exactly 2-1001, so circulation.When platform area identifies, using related coefficient algorithm, platform is carried out
The judgement of area's identification, related coefficient algorithm are a kind of methods for measuring the linear relationship between two variables.Even if related coefficient
As a result the degree of correlation of X and Y are quantitatively featured, i.e. correlation coefficient value is bigger, and degree of correlation is bigger, and value maximum is 1,
It indicates that two linear variable displacement close relation degree are very strong, is strong correlation relationship；When correlation coefficient value is smaller, X and Y phase is usually said
Pass degree is poor；There is no linear relationship, there are reactive power and transformer in power distribution station all and be linear attaching relation, therefore root
Data intercept is carried out related coefficient calculating, obtains correlation coefficient value, carries out the judgement of subscriber board area ownership by algorithm accordingly.It converges
Collect unit according to distribution unit testing result, platform area automatically generates electric topology figure.The figure eventually formed is similar to following Fig. 3 and figure
Shown in 4.In Fig. 4, small circular is ammeter box end CTU equipment, indicates branch point at big circle.
In low-voltage platform area when topological relation automatic identification, using current detection mode, the reactive current generated by every CTU
Pulse train detects corresponding pulse sequence signal according to the CTU of each branched line, carries out sentencing for front and back logical relation
It is disconnected, by traversal search algorithm, determine topological network node context and concurrency relation.CTU can believe with user's table to electricity box
Breath close, and can accurately realize entire platform area electric diagram.
In low-voltage platform area when fault location, under the premise of realizing platform area's network topology, by judging that branch point switchs shape
State or the electric current that whether breaks down promote first-aid repair efficiency to determine position of failure point, and can analyzing influence number of users, it is real
Existing minute grade, which has a power failure, to be alerted.
As shown in figure 5, it is existing by taking a pilot as an example, it illustrates it and realizes that low-voltage platform area topology knows method for distinguishing, this area
Live topological structure is radioactivity umbrella, and each distribution unit sends pulse sequence signal according to distribution transformer terminals communication command,
Collect unit simultaneously and remaining all distribution unit is monitored, if there is monitoring signal, then the distribution unit acted
It is child node, collects that unit is sure to monitor all signals under this area, ultimately forms electrical relation figure shown in Fig. 6.Pass through
Each distribution unit is associated when installing with practical electricity box title (archives standard packing box title), so that it may with practical electrical pass
Connection, facilitates O&M to be searched.Distribution transformer terminals collect topological logic information in unit by RS485 reading, and carry out respective tube
Reason.
Figure 1 above, a kind of low-voltage platform area electric topology identification system and its working method shown in 2,3,4,5,6,7,8 are
Specific embodiments of the present invention have embodied substantive distinguishing features of the present invention and progress, needs can be used according to actual, at this
Under the enlightenment of invention, the equivalent modifications of shape, structure etc., the column in the protection scope of this programme are carried out to it.
Claims (10)
1. a kind of low-voltage platform area electric topology identification system, characterized by comprising:
Collect unit: being set to distribution low-voltage side outlet；Collect unit and passes through wireless collection power distribution station circumferential distribution element address
Distribution unit address is collected in inquiry, and distribution unit movement is allowed to generate reactive current pulse or reactive power as characteristic signal,
The identification judgement of platform area is carried out by the characteristic signal on detection bus, by analyzing each node logical relationship, is automatically formed electrical
Topological logic relationship；
Distribution unit: being connected with unit wireless is collected, and is set to branch point or electricity box side, generation, detection for characteristic signal
And node relationships analysis；By being communicated with electricity box concentrator or user's table, user's table information is obtained, realizes that family becomes relationship and knows
Not, response collects element address querying command, reports address information, and instruct by specified regular quick-switching according to unit is collected
Power capacitor C1 generates the characteristic signal sequence of certain rule.
2. a kind of low-voltage platform area electric topology identification system according to claim 1, it is characterised in that: collect unit and divide
Cloth unit carries geographical location information GPS, and equipment can find and register automatically in a network, and when registered network carries its geographical position
Confidence breath, host find the slave in set distance range according to its geographical location information, are sequentially generated signal to these slaves
Pulse, judges whether itself and host belong to an area Ge Tai；Distribution unit by in electricity box concentrator carry out RS485 communication,
Ammeter information under concentrator is obtained, realizes that family becomes relationship and establishes, set distance range is 1~5 kilometer.
3. a kind of low-voltage platform area electric topology identification system according to claim 2, it is characterised in that: each distribution unit
After receiving this order, according to address difference, within a certain period of time, staggers the time and report respective address information, collect unit and receive return
Behind the address of distribution unit, the movement of each distribution unit is successively allowed to generate characteristic signal sequence, according to collecting unit and each branch
Point distribution unit whether detect corresponding characteristic signal sequence, come judge distribution unit platform area's attaching relation and they between
Front and back logical relation accurately identifies distribution unit all under platform area, in this way, being repeated several times, identifies newly-increased distribution unit equipment.
4. a kind of low-voltage platform area electric topology identification system according to claim 3, it is characterised in that: the distribution list
Member is equipped with characteristic signal generative circuit, and the characteristic signal generative circuit includes power relay J1, power relay J2, function
Rate relay J3, it is kept with power relay J3 concatenated silicon-controlled T1 and power capacitor C1, the magnetic in parallel with silicon-controlled T1
Relay J4, the power relay J1, power relay J2 series connection, the power relay J2 and power relay J3
Parallel connection, the contact of the power relay J1 include the second contact, select the first contact and that one is electrically connected with the second contact
Three contacts；The contact of the power relay J2 include the 5th contact, select with the second contact the 4th contact that one is electrically connected and
6th contact, the 8th contact that the contact of the power relay J3 includes the 7th contact and can be electrically connected with the 7th contact；
5th contact is electrically connected with the 7th contact, and second contact is electrically connected with the 4th contact, first contact,
Third contact, the 6th contact are connect with phase line；8th contact is electrically connected with silicon-controlled T1；The power capacitor C1
One end is electrically connected with silicon-controlled T1, and the other end is electrically connected with the neutral conductor.
5. a kind of low-voltage platform area electric topology identification system according to claim 4, it is characterised in that: distribution unit has
Short circuit current detection, outage information reporting functions and remote signalling amount acquisition module pass through detection line short circuit current and acquisition remote signalling
Killer switch displacement in amount acquisition feeder pillar body, judges position of failure point and power failure coverage.
6. using a kind of low-voltage platform area of low-voltage platform area electric topology identification system described in claim 1-5 any claim
Electric topology discrimination method, it is characterised in that the following steps are included:
1) collect unit in the installation of distribution transforming first end-side, distribution unit is installed in ammeter box and line branch point；
2) after collecting unit starting platform area recognition command, collect unit and start the inquiry of broadcast distribution element address, collect and nearby divide
Cloth element address；
3) distribution unit obtains user's table information, realizes that family becomes relationship and knows by communicating with electricity box concentrator or user's table
Not, it after each distribution unit receives address lookup order, according to address difference, within a certain period of time, staggers the time and reports respectively
Location information；
4) distribution transforming head end collects unit, receives all addresses for returning to distribution units, then issues instruction and successively allows each distribution
Unit movement generates characteristic signal sequence；
5) distribution unit becomes reactive power in power grid according to instruction by specified regular quick-switching power capacitor C1
Change, generates the characteristic signal sequence of certain rule；
6) collect unit and distribution unit detection characteristic signal, whether detected according to the distribution unit for collecting unit and each branch point
Platform is identified to corresponding characteristic signal sequence to judge distribution unit platform area's attaching relation and front and back logical relation between them
All distribution units under area identify newly-increased distribution unit equipment in this way, being repeated several times；Generate platform area electric topology structure.
7. electric topology discrimination method in low-voltage platform area according to claim 6, it is characterised in that: in step 6), collect
Unit and each point distribution unit analyze the characteristic signal sequence detected, are received using pulse train phase knowledge and magnanimity to determine
Signal is detected, pulse train similarity degree height indicates to be positively correlated, i.e., accurately detects signal, the low expression of pulse train similarity degree
Do not detect corresponding signal.
8. electric topology discrimination method in low-voltage platform area according to claim 7, it is characterised in that: collect unit sampling starting
Point uses voltage zero-cross mode in the same direction: the movement of distribution unit voltage over zero collects cell voltage zero passage point sampling；Operating point with
Sampled point is synchronous, to eliminate so that the median without work value that sampling obtains.
9. electric topology discrimination method in low-voltage platform area according to claim 8, it is characterised in that: sample frequency is set as
20ms, with anti-even-order harmonic；When maxima and minima difference is greater than capacitor input in the data of interception, then it is assumed that the group
There is catastrophe point in data, that is, there is external disturbance, removes the noise spot and participate in calculating.
10. electric topology discrimination method in low-voltage platform area according to claim 8, it is characterised in that: low-voltage platform area topology is closed
It is automatic identification using current detection mode, the reactive current pulse train generated by every distribution unit, according to each branch
The distribution unit of route detects corresponding pulse sequence signal, carries out the judgement of front and back logical relation, by traversal search algorithm,
Determine topological network node context and concurrency relation, distribution unit is associated with user's table information to electricity box, Ke Yizhun
Really existing entire platform area electric diagram；
When low-voltage platform area is broken down, under the premise of realizing platform area's network topology, by judge branch point switch state or
Whether person breaks down electric current, to determine position of failure point, to promote first-aid repair efficiency, and can analyzing influence number of users, realize
Minute grade, which has a power failure, to be alerted.
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