CN209707631U - A kind of low-voltage platform area line family relationship identification system based on current distortion - Google Patents
A kind of low-voltage platform area line family relationship identification system based on current distortion Download PDFInfo
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- CN209707631U CN209707631U CN201920348409.0U CN201920348409U CN209707631U CN 209707631 U CN209707631 U CN 209707631U CN 201920348409 U CN201920348409 U CN 201920348409U CN 209707631 U CN209707631 U CN 209707631U
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Abstract
The utility model discloses a kind of low-voltage platform area line family relationship identification system based on current distortion, it include: the summary table being mounted on every branched line head end, several electric energy meters of correspondence several users mounted on every branched line, and the concentrator communicated with all electric energy meters and summary table in platform area；Wherein, the concentrator is for generating control instruction；The electric energy meter is used to generate distortion current at the preset alternative moment；The summary table is for detecting the distortion current for flowing through whole branched line, with the determining electric energy meter for being in same branched line with the summary table.A kind of low-voltage platform area line family relationship identification system based on current distortion provided by the utility model, only pass through identification electric energy meter distortion current, just it can judge whether the electric energy meter is on same branched line with summary table, both it does not need to have a power failure, it, can identification line family relationship within a short period of time when line family, relationship changes without manual intervention, strong antijamming capability, accuracy rate are high.
Description
Technical field
The utility model embodiment is related to power distribution network electric parameter measurement applied technical field, more particularly to a kind of based on electric current
The low-voltage platform area line family relationship identification system of distortion.
Background technique
Low-voltage platform area by transformer, electric wire and user's power meter group at.Step down side generally has multiple branches line,
In order to calculate line loss, needs to differentiate " line family " relationship, is i.e. which electric energy meter mounted on every branch line.It adopts existing low-voltage platform area
With power line carrier, micropower be wireless etc., communication modes acquire data, it can be difficult under same area of identification on different branch lines
There is which electric energy meter.For this reason, it may be necessary to erecting bed area electric topology identification device, platform area line family relationship is collected, and can be according to opening up
Variation is flutterred to timely update line family corresponding relationship.Existing area line family relation recognition method is as follows:
(1) power failure method.As shown in Figure 1, there is 3 branched lines, every route is connected to several electric energy meters.Every electric energy meter
There is power off time record, records respectively and have a power failure the moment and power on the moment.Route 1, route 2, route 3 stop in different moments respectively
Electricity, different moments power on.By comparing the power cut record of each electric energy meter, electric energy meter 1 and electric energy meter 2 can be specified on route 1,
Electric energy meter 3 and electric energy meter 4 are on route 2, and electric energy meter 5 and electric energy meter 6 are on route 3.
(2) comparision of quantity of electricity method.As shown in Fig. 2, the head end in every branched line installs a summary table, for measuring this point
The total electricity of branch line.In the correct situation of online family relationship, the electricity of summary table is equal to all electric energy meter electricity on the branch line
The sum of.Therefore, coulometry is gathered by examination, so that it may show that summary table is combined with maximum possible electric energy meter, to differentiate line family correspondence
Relationship.
(3) coordinate setting assists in identifying method.The geographic coordinate information of each electric energy meter is first acquired, then passes through power line carrier
Technology determines the phase sequence (which phase for belonging to ABC) of every electric energy meter.In general, the electric energy meter geography position on same branch line
Set closer, and phase sequence is also essentially identical.Therefore by geographic coordinate information and phase sequence information, branch can substantially be sketched the contours of
The corresponding relationship of line and electric energy meter.By above-mentioned corresponding relationship in conjunction with manual confirmation, to obtain line family corresponding relationship.
But regrettably, three of the above recognition methods in the prior art haves the defects that certain, as follows:
(1) accuracy of power failure method identification line family relationship is high, but needs to generate by switching on and once stop sending a telegram in reply, and influences
User power utilization quality.Especially for sensitive users, power failure identification line family relationship can not be passed through.In addition, when there is user to be cut
When being connected on other branch lines, power failure method is difficult to reflect the dynamic change of power grid topological relation in real time.
(2) comparision of quantity of electricity method is by calculating identification line family relationship, without having a power failure.But (the example under the environment of line loss exception
Such as stealing), the accuracy of comparision of quantity of electricity method will receive larger impact.When a certain branch line has tax evasion electricity, the electricity number of summary table
According to the sum of the electricity for being not equal to the connect electric energy meter of the route.
(3) coordinate setting assists in identifying method without power failure, does not influence user's normal electricity consumption.But this method needs manually
Cooperation, and the dynamic change of more difficult reflection power grid topological relation.
Utility model content
The utility model provides a kind of low-voltage platform area line family relationship identification system based on current distortion, to solve existing skill
The deficiency of art.
To achieve the above objectives, the present invention provides the following technical solutions:
A kind of low-voltage platform area line family relationship identification system based on current distortion, which is characterized in that the system comprises:
The summary table being mounted on every branched line head end,
Several electric energy meters of correspondence several users mounted on every branched line, and,
The concentrator communicated with electric energy meters all in platform area and summary table；Wherein,
The concentrator is for generating control instruction；
The electric energy meter is used to generate distortion current at the preset alternative moment；
The summary table is in same with the summary table for detecting the distortion current for flowing through whole branched line, with determining
The electric energy meter of branched line.
Further, in the low-voltage platform area line family relationship identification system based on current distortion, the summary table is built-in with
Current distortion detector.
Further, in the low-voltage platform area line family relationship identification system based on current distortion, built in the electric energy meter
There is current distortion generator.
Further, in the low-voltage platform area line family relationship identification system based on current distortion, the summary table passes through CT
The distortion current of whole branched line is flowed through in detection.
A kind of low-voltage platform area line family relationship identification system based on current distortion provided by the embodiment of the utility model, only leads to
Identification electric energy meter distortion current is crossed, just can judge whether the electric energy meter is on same branched line with summary table, does not both need to stop
Electricity, without manual intervention, when line family, relationship changes, can identification line family relationship within a short period of time, anti-interference energy
Power is strong, and accuracy rate is high.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the technology schematic diagram of power failure method identification line family relationship in the prior art；
Fig. 2 is the technology schematic diagram of comparision of quantity of electricity method identification line family relationship in the prior art；
Fig. 3 is the knot of the low-voltage platform area line family relationship identification system provided by the embodiment of the utility model based on current distortion
Structure schematic diagram；
Fig. 4 is the structural schematic diagram of electric energy meter in the utility model embodiment；
Fig. 5 is the structural schematic diagram of summary table in the utility model embodiment；
Fig. 6 is the structural schematic diagram of identifying system specific example in the utility model embodiment；
Fig. 7 is distortion current generator circuit schematic diagram in the utility model embodiment；
Fig. 8 is distortion current schematic diagram in the utility model embodiment.
Appended drawing reference:
Summary table 10, electric energy meter 20, concentrator 30, current distortion detector 40, current distortion generator 50, current transformer
60。
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Embodiment one
Attached drawing 3 is please referred to, a kind of low-voltage platform area line family based on current distortion provided for the utility model embodiment one
The structural schematic diagram of relationship identification system.The system comprises:
The summary table 10 being mounted on every branched line head end,
Several electric energy meters 20 of correspondence several users mounted on every branched line, and,
The concentrator 30 communicated with electric energy meters all in platform area and summary table；Wherein,
The concentrator 30 is for generating control instruction；
The electric energy meter 20 is communicated to connect with the concentrator 30, for being used for default after receiving control instruction
The alternative moment generate distortion current；
The summary table 10 is communicated to connect with the concentrator 30, for detecting the distortion current for flowing through whole branched line,
With the determining electric energy meter 20 for being in same branched line with the summary table 10.
Wherein, the summary table 10 is built-in with current distortion detector 40 (as shown in Figure 4), and the electric energy meter 20 is built-in with electricity
Stream distortion generator 50 (as shown in Figure 5).
Specifically, the summary table 10 detects the distortion current for flowing through whole branched line by current transformer (CT) 60.
Fig. 6 is that the structural schematic diagram of the specific example of the system provided in the present embodiment works as electricity by taking route 1 in Fig. 6 as an example
It can the generation of table 1 distortion current I1When, summary table 1 monitors distortion current I11。I11With I1It is similar.When the electric energy meter 3 on route 2 generates
Distortion current I3When, summary table 2 monitors distortion current I21, I21With I3It is similar, and summary table 1, summary table 3 monitoring less than with I3It is similar
Distortion current.
Current distortion generator generates distortion current using short-circuit between conductors, and circuit diagram is as shown in Figure 7.With three-phase meter
For, a switch (Sa/Sb/Sc) and a current-limiting resistance (Ra/Rb/Rc) are accessed between every phase line and zero curve.If
It is single-phase meter, then accesses a switch and a current-limiting resistance between two power supply lines.It, will be in A phase when switch Sa is closed
Generate short circuit current.It can control the short circuit current duration by controlling Sa closing time, distortion current is only in phase voltage mistake
Zero crossings generate.
Distortion current schematic diagram is as shown in Figure 8.Former and later two time points of voltage over zero are as generation current distortion
Alternative moment, such as t1~t8It is shown.The duration of each current distortion is all the same, is selected by certain coding rule at certain
A little alternative moment generate current distortion, and certain alternative moment do not generate current distortion.
The current distortion detector of summary table then detects whether that there are distortion currents at the fixed alternative moment, if continuous
Multiple voltage cycles detect distortion current, then it is assumed that generate the electric energy meter of the distortion current and detect the distortion current
Summary table is on same branched line.Distortion current is only generated in particular moment, and the anti-interference of distortion current detection can be improved
Property, prevent the crosstalk for closing on platform area distortion current.
In order to facilitate understanding, the specific method of platform area line family relation recognition is given below:
(1) concentrator is communicated with electric energy meter 1, and electric energy meter 1 is allowed to generate distortion current.
(2) concentrator is by electric energy meter 1 in specified alternative moment (t1、t3、t5、t7) distortion current is generated, when other are alternative
Carve (t2、t4、t6、t8) do not generate distortion current.
(3) if electric energy meter 1 is single-phase electric energy meter, directly generation distortion current, duration are 20 cycles.If electric
Energy table 1 is three-phase electric energy meter, then distortion current is first generated in A phase, and the duration is 20 cycles；Then it is generated in B phase
Distortion current, duration are 20 cycles；Distortion current is finally generated in C phase, the duration is 20 cycles.
(4) summary table 1, summary table 2, summary table 3 detect distortion current in A, B, C phase.In the electronic circuit as shown in figure 3, only always
Table 1 can detect the distortion current that electric energy meter 1 generates, and summary table 2 and summary table 3 can't detect distortion current.
(5) summary table 1 generates the duration of distortion current according to electric energy meter 1, judges that electric energy meter 1 is single-phase meter or three-phase
Table.
(6) if electric energy meter 1 is three-phase meter, at the time of summary table 1 is generated according to distortion current, judge electric energy meter 1 phase sequence and
Whether the phase sequence of summary table 1 is consistent.If inconsistent, phase sequence fault alarm is generated.
(7) summary table 1 is communicated with concentrator, informs that concentrator electric energy meter 1 and summary table 1 are in same branched line.
(8) concentrator is communicated with electric energy meter 2, is allowed electric energy meter 2 to generate distortion current, is repeated step (2)~(7).
(9) concentrator and all electric energy meters complete above-mentioned steps, ultimately generate corresponding relationship as shown in table 1 below.
1 branched line of table and electric energy meter mapping table
| Route 1 | Summary table 1 | Electric energy meter 1 | Electric energy meter 2 |
| Route 2 | Summary table 2 | Electric energy meter 3 | Electric energy meter 4 |
| Route 3 | Summary table 3 | Electric energy meter 5 | Electric energy meter 6 |
Through the above steps, every summary table can identify and its all electric energy meter on same branched line, and every
A each household installs an electric energy meter, to obtain low-voltage platform area line family relationship.
It should be noted that if certain electric energy meter is in alternative moment (t1、t3、t5、t7) generation distortion current, and summary table
Occurs for the distortion current detected for (t the moment1、t2、t3、t4、t5、t7), then illustrate that identification process is interfered, and needs other
Period carries out line family relation recognition again.
A kind of low-voltage platform area line family relationship identification system based on current distortion provided by the embodiment of the utility model, only leads to
It crosses identification electric energy meter distortion current and generates moment and duration, just can judge whether the electric energy meter with summary table is in same branch
It on route, does not both need to have a power failure, can be identified within a short period of time when relationship changes when line family without manual intervention
Line family relationship, strong antijamming capability, accuracy rate are high.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (4)
1. a kind of low-voltage platform area line family relationship identification system based on current distortion, which is characterized in that the system comprises:
The summary table being mounted on every branched line head end,
Several electric energy meters of correspondence several users mounted on every branched line, and,
The concentrator communicated with electric energy meters all in platform area and summary table；Wherein,
The concentrator is for generating control instruction；
The electric energy meter and the concentrator communicate to connect, for being produced after receiving control instruction at the preset alternative moment
Raw distortion current；
The summary table and the concentrator communicate to connect, for detect the distortion current for flowing through whole branched line, to determine and
The summary table is in the electric energy meter of same branched line.
2. a kind of low-voltage platform area line family relationship identification system based on current distortion according to claim 1, feature exist
In the summary table is built-in with current distortion detector.
3. a kind of low-voltage platform area line family relationship identification system based on current distortion according to claim 1, feature exist
In the electric energy meter is built-in with current distortion generator.
4. a kind of low-voltage platform area line family relationship identification system based on current distortion according to claim 1, feature exist
In the summary table flows through the distortion current of whole branched line by CT detection.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856507A (en) * | 2019-03-19 | 2019-06-07 | 广东电网有限责任公司 | A kind of low-voltage platform area line family relation recognition method and system based on current distortion |
| CN114019211A (en) * | 2021-10-14 | 2022-02-08 | 国网福建省电力有限公司福州供电公司 | Distortion current sampling method and system |
-
2019
- 2019-03-19 CN CN201920348409.0U patent/CN209707631U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856507A (en) * | 2019-03-19 | 2019-06-07 | 广东电网有限责任公司 | A kind of low-voltage platform area line family relation recognition method and system based on current distortion |
| CN109856507B (en) * | 2019-03-19 | 2024-04-02 | 广东电网有限责任公司 | Low-voltage transformer area line-user relationship identification method and system based on current distortion |
| CN114019211A (en) * | 2021-10-14 | 2022-02-08 | 国网福建省电力有限公司福州供电公司 | Distortion current sampling method and system |
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