CN208283459U - A kind of current monitoring device - Google Patents
A kind of current monitoring device Download PDFInfo
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- CN208283459U CN208283459U CN201821026035.2U CN201821026035U CN208283459U CN 208283459 U CN208283459 U CN 208283459U CN 201821026035 U CN201821026035 U CN 201821026035U CN 208283459 U CN208283459 U CN 208283459U
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Abstract
The utility model relates to a kind of current monitoring devices, the device includes: current transformer, low-pass filter, sampling apparatus, data processor, alarm, current transformer is connected with N600 one point earth ground line, low-pass filter is connected with current transformer and sampling apparatus, sampling apparatus is connected with the input of data processor, and alarm is connected with the output of data processor；Current transformer is used to acquire the current signal at N600 one point earth ground line；Low-pass filter is used to carry out low-pass filtering treatment to current signal；Sampling apparatus obtains voltage signal for converting the current signal after low-pass filtering treatment；Data processor is used to determine the current effective value of N600 one point earth ground line based on voltage signal；Alarm is used to alarm in the case where current effective value is greater than preset threshold.The utility model solves in the prior art since operations staff needs the technical issues of measuring not in time caused by O&M website is more, road is remote with test leakage amount.
Description
Technical field
The utility model relates to the technical fields of electric system, more particularly, to a kind of current monitoring device.
Background technique
According to Southern Power Grid Company countermeasure, in substation the voltage secondary circuit of each voltage class one and only one
Grounding point.For the correct movement for guaranteeing protection equipment in standing, Secondary Circuit of Potential Transformer N600 must have and only a little connect
Ground.When there are when multiple grounding points, since the relative potentials of each grounding point are different, may cause the measurement of protective device in station
Voltage is different, causes the malfunction or tripping of protective device, endangers the safe operation of power grid.
Currently, for the substation to have put into operation, the monitoring of Secondary Circuit of Potential Transformer N600 one point earth electric current, by becoming
The measurement of a N600 ground connection line current value is carried out electricity operation personnel's every half a year, if the current value of measurement is more than last measured value
20mA, or be greater than 50mA when, immediately notify transforming plant protecting service personnel carry out special examination.Since operations staff needs to transport
Phenomena such as dimension website is more, and road is remote, inevitably will cause measurement, test leakage amount not in time.Also, since interval time of measurement is long, hair
It when raw multipoint earthing, can not find in time, bring hidden danger to protection safe and stable operation.
Utility model content
The purpose of this utility model is to provide a kind of current monitoring devices, existing in the prior art due to fortune to solve
Administrative staff needs the technical issues of measuring not in time caused by O&M website is more, road is remote with test leakage amount.
A kind of current monitoring device provided by the utility model, comprising: current transformer, low-pass filter, sampling apparatus,
Data processor, alarm, wherein the current transformer is connected with N600 one point earth ground line, the low-pass filtering
Device is connected with the current transformer and the sampling apparatus respectively, the input of the sampling apparatus and the data processor
It is connected, the alarm is connected with the output of the data processor；
The current transformer is used to acquire the current signal at the N600 one point earth ground line；
The low-pass filter is used to carry out low-pass filtering treatment to the current signal；
The sampling apparatus obtains voltage letter for converting the current signal after low-pass filtering treatment
Number；
The data processor is used to determine that the electric current of the N600 one point earth ground line has based on the voltage signal
Valid value；
The alarm is used to alarm in the case where the current effective value is greater than preset threshold.
Further, described device further include: memory, wherein the memory is connected with the data processor,
The memory is used to store the current effective value of the N600 one point earth ground line.
Further, the current effective value of the N600 one point earth ground line is according to acquisition date storage in the storage
Device.
Further, described device further include: liquid crystal display, wherein the liquid crystal display and the data processing
Device is connected, and the liquid crystal display is for dynamically showing the current effective value.
Further, the data of the current effective value are multiple groups, and every group each for N600 one point earth ground line
The current effective value of the moon, and the liquid crystal display shows 1 year 12 groups of data according to prefixed time interval circulation.
Further, corresponding device further include: clock module, wherein the clock module and the data processor phase
Connection, the clock module are used to provide clocking capability for the data processor；
Wherein, after the clock module timing terminates, timing signal is sent to the data processor, so that described
Sampling apparatus described in data processor controlled acquires the current signal after the low-pass filtering treatment.
Further, described device further include: power module, wherein the power module respectively with the data processing
Device is connected with the alarm, and the power module is used to provide working power for the current monitoring device.
Further, described device further include: PT measure and control device, wherein the input terminal of the PT measure and control device with it is described
The output end of alarm is connected, and the output end of the PT measure and control device is connected with the input terminal of monitoring host computer；
The PT measure and control device is used to obtain the alarm signal that the alarm issues, and is executed according to the alarm signal
Corresponding Preservation tactics.
Further, the current transformer is high-precision punching current transformer.
Further, the sample frequency of the sampling apparatus is once every hour.
In the utility model embodiment, the electric current at N600 one point earth ground line is acquired by current transformer and is believed
Number；Low-pass filtering treatment is carried out to current signal by low-pass filter；It will be after low-pass filtering treatment by sampling apparatus
Current signal is converted, and voltage signal is obtained；Determine that N600 one point earth is grounded based on voltage signal by data processor
The current effective value of line；It is alarmed by alarm in the case where current effective value is greater than preset threshold.Pass through above-mentioned processing side
Formula is able to solve in the prior art since operations staff needs measurement caused by O&M website is more, road is remote not in time and test leakage
The technical issues of amount.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of schematic diagram of current monitoring device provided by the embodiment of the utility model；
Fig. 2 is the schematic diagram of another current monitoring device provided by the embodiment of the utility model.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
According to the utility model embodiment, a kind of embodiment of current monitoring device is provided.
Fig. 1 is according to a kind of current monitoring device schematic diagram provided by the utility model, as shown in Figure 1, the current monitoring
Device includes: current transformer 10, low-pass filter 20, sampling apparatus 30, data processor 40, alarm 50.
As shown in Figure 1, the current transformer 10 is connected with N600 one point earth ground line, the low-pass filter 20
It is connected respectively with the current transformer 10 and the sampling apparatus 30, the sampling apparatus 30 and the data processor 40
Input be connected, the alarm 50 is connected with the output of the data processor 40.
Specifically, the current transformer 10 is used to acquire the current signal at the N600 one point earth ground line；It is excellent
Selection of land, current transformer 10 are high-precision punching current transformer 10.
The low-pass filter 20 is used to carry out low-pass filtering treatment to the current signal；
The sampling apparatus 30 obtains voltage letter for converting the current signal after low-pass filtering treatment
Number；
The data processor 40 is used to determine the electric current of the N600 one point earth ground line based on the voltage signal
Virtual value；
The alarm 50 is used to alarm in the case where the current effective value is greater than preset threshold.
In the utility model embodiment, the electric current at N600 one point earth ground line is acquired by current transformer 10 and is believed
Number；Low-pass filtering treatment is carried out to current signal by low-pass filter 20；By sampling apparatus 30 by low-pass filtering treatment it
Current signal afterwards is converted, and voltage signal is obtained；N600 one point earth is determined based on voltage signal by data processor
The current effective value of ground line；It is alarmed by alarm in the case where current effective value is greater than preset threshold.Pass through above-mentioned place
Reason mode, be able to solve in the prior art since operations staff needs measurement caused by O&M website is more, road is remote not in time and
The technical issues of test leakage amount.
Specifically, as shown in Figure 1, in the utility model embodiment, (the i.e. high-acruracy survey punching electricity of current transformer 10
Road mutual inductor) input terminal and N600 one point earth ground line be connected, for acquiring at the N600 one point earth ground line
Current signal and be output in low-pass filter 20.
In the utility model embodiment, the output of the input terminal of the low-pass filter 20 and the current transformer 10
End is connected, and the output end of the low-pass filter 20 is connected with the input terminal of the sampling apparatus 30, for the electricity
It flows signal and carries out low-pass filtering treatment, and will export by filtered current signal into sampling apparatus 30.
In the utility model embodiment, the input terminal of the output end of the sampling apparatus 30 and the data processor 40
It is connected, for converting the current signal after the low-pass filtering treatment, obtains voltage signal, and will be described
Voltage signal is exported into the data processor.
In the utility model embodiment, the data processor 40 is used to carry out data operation to the voltage signal,
Obtain the current effective value of the N600 one point earth ground line.
In an optional embodiment of the present embodiment, as shown in Fig. 2, described device further include: memory 60, clock
Module 70, liquid crystal display 80 and power module 90.
As shown in Fig. 2, data processor 40 also respectively with the memory 60, clock module 70, the liquid crystal display
80, the power module 90 is connected.
Memory 60 is used to store the current effective value of the N600 one point earth ground line, wherein N600 one point earth
The current effective value of ground line is according to acquisition date storage in the memory.Liquid crystal display 80 is for described in dynamically display
Current effective value.
Specifically, the data processor 40 can by the current effective value according to date storage in the memory 60
In, and the current effective value is output to the liquid crystal display 80 and carries out Dynamically Announce above.
Such as: in an alternative embodiment, data processor 40 sets each hour acquisition primary voltage signal, and
A data operation is carried out, obtained current effective value is stored in the memory 60 according to the time.That is, herein
In the case of, one current effective value of each hour correspondence, 24 hours one day correspondences, 24 current effective values.
Later, data processor 40 carries out data processing to the voltage signal obtained daily again, and the electric current for obtaining the same day has
Valid value for example, obtaining 24 current effective values, and this 24 current effective values is stored according to preset rules to the memory
In 60.
Wherein, preset rules it is to be understood that the setting of data processor 40 to being stored in the memory 60 daily
24 current effective values carry out it is primary relatively operate, and after removing a maximum value and a minimum value, to remaining 22 electricity
Stream virtual value carry out operation of averaging, through operation result as same day measurement data, and by the same day measurement data according to
Date storage is to memory.
Further, the data processor 40 can also continue to carry out at data the same day measurement data monthly obtained
Reason obtains of that month measurement data, and stores into the memory 60.
Such as: the same day measurement data being monthly stored in memory 60 is sought in the setting of data processor 40
Average value operation, using obtained result as of that month measurement data, and by the of that month measurement data according to date storage in institute
It states in memory 60.
Optionally, monthly storing same day measurement data in the memory includes: to survey on current month all same day
Measure data, wherein the number of same day measurement data is at least one of following data number: 28,29,30 and 31.
In the utility model embodiment, as shown in Fig. 2, clock module 70 is connected with the data processor 40, use
In providing the clocking capability for being able to satisfy the above setting for the data processor 40.
Such as: after 70 timing of clock module terminates, timing signal is sent to the data processor 40, so that
The data processor 40 controls the sampling apparatus 30 and acquires the current signal after the low-pass filtering 20 is handled.
Further, the data processor 40 will also compare judgement to the current effective value, if the electricity
When flowing virtual value more than setting value, then the data processor 40 issues alarm signal and is input in the alarm 50.
Such as: the same day measurement data is compared in data processor 40, if the same day measurement data is greater than
Or being equal to 50mA, then the data are more than preset value, and the data processor 40 sends alarm signal to the alarm.
Meanwhile the of that month measurement data is compared in the data processor 40, if this month measurement data
It is compared with the of that month measurement data before stored in the memory 60 six months, the absolute value of the difference of the two is greater than or waits
In 20mA, then the data are more than preset value, and the data processor 40 sends alarm signal to the alarm.
In the utility model embodiment, described device further include: power module 90, wherein power module 90 respectively with institute
It states data processor 40 to be connected with the alarm 50, for providing working power for the current monitoring device.
Described device further include: alarm 50, wherein the input terminal of the alarm 50 and the data processor 40
Output end is connected, and the output end of the alarm 50 is connected with the input terminal of PT measure and control device 100.Specifically, the report
Alert device 50 can obtain the alarm signal that the data processor 40 issues when the current effective value is more than default value, and
Alarm is made a sound, while outputting alarm signal gives PT measure and control device.
In the utility model embodiment, described device further include: PT measure and control device, wherein the PT measure and control device
Input terminal is connected with the output end of the alarm 50, the input terminal phase of the output end and monitoring host computer of the PT measure and control device
Connection；The PT measure and control device is used to obtain the alarm signal that the alarm 50 issues, and is executed according to the alarm signal
Corresponding Preservation tactics.
Optionally, the liquid crystal display 80 once shows an of that month measurement data, and follows according to prefixed time interval
Ring shows 1 year 12 data.Specifically, the display data format of the liquid crystal display 80 is in the following example: in May, 2018
20.866mA.Recycle 1 year 12 data of Dynamically Announce.
As can be seen from the above description, the utility model embodiment has accomplished that daily self-timing connects N600 one point earth
Ground line current measures, and can find current values exception in time and issue alarm signal, notifies operation maintenance personnel；Alleviate change
Electricity operation personnel's bears the O&M of N600 one point earth ground line current monitoring, realizes automatic measurement, automatic to show, from
Dynamic alarm；Present apparatus structure is simple, and installation operates convenient, economical and practical, using flexible, and design is rationally, compact-sized, has very
Good market prospects.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the unit,
Only a kind of logical function partition, there may be another division manner in actual implementation, in another example, multiple units or components can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be through some communication interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of current monitoring device characterized by comprising current transformer, low-pass filter, sampling apparatus, at data
Manage device, alarm, wherein the current transformer is connected with N600 one point earth ground line, the low-pass filter difference
It is connected with the current transformer and the sampling apparatus, the sampling apparatus is connected with the input of the data processor
It connects, the alarm is connected with the output of the data processor；
The current transformer is used to acquire the current signal at the N600 one point earth ground line；
The low-pass filter is used to carry out low-pass filtering treatment to the current signal；
The sampling apparatus obtains voltage signal for converting the current signal after low-pass filtering treatment；
The data processor is used to determine the current effective value of the N600 one point earth ground line based on the voltage signal；
The alarm is used to alarm in the case where the current effective value is greater than preset threshold.
2. current monitoring device according to claim 1, which is characterized in that described device further include: memory, wherein
The memory is connected with the data processor, and the memory is used to store the electricity of the N600 one point earth ground line
Flow virtual value.
3. current monitoring device according to claim 2, which is characterized in that the electric current of the N600 one point earth ground line
Virtual value is according to acquisition date storage in the memory.
4. current monitoring device according to claim 1, which is characterized in that described device further include: liquid crystal display,
In, the liquid crystal display is connected with the data processor, and the liquid crystal display is for dynamically showing the electric current
Virtual value.
5. current monitoring device according to claim 4, which is characterized in that the data of the current effective value are multiple groups,
Every group of current effective value for being grounded every month for the N600 one point earth, and the liquid crystal display is according between preset time
1 year 12 groups of data is shown every circulation.
6. current monitoring device according to claim 1, which is characterized in that corresponding device further include:
Clock module, wherein the clock module is connected with the data processor, and the clock module is used to be the number
Clocking capability is provided according to processor；
Wherein, after the clock module timing terminates, timing signal is sent to the data processor, so that the data
Processor controls the sampling apparatus and acquires the current signal after the low-pass filtering treatment.
7. current monitoring device according to claim 1, which is characterized in that described device further include: power module,
In, the power module is connected with the data processor and the alarm respectively, and the power module is for being described
Current monitoring device provides working power.
8. current monitoring device according to claim 1, which is characterized in that described device further include: PT measure and control device,
In, the input terminal of the PT measure and control device is connected with the output end of the alarm, the output end of the PT measure and control device with
The input terminal of monitoring host computer is connected；
The PT measure and control device is used to obtain the alarm signal that the alarm issues, and is executed accordingly according to the alarm signal
Preservation tactics.
9. current monitoring device according to claim 1, which is characterized in that the current transformer is high-precision punching electricity
Current transformer.
10. current monitoring device according to claim 1, which is characterized in that the sample frequency of the sampling apparatus is every
Hour is primary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821026035.2U CN208283459U (en) | 2018-06-29 | 2018-06-29 | A kind of current monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821026035.2U CN208283459U (en) | 2018-06-29 | 2018-06-29 | A kind of current monitoring device |
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| Publication Number | Publication Date |
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| CN208283459U true CN208283459U (en) | 2018-12-25 |
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ID=64704857
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| CN201821026035.2U Active CN208283459U (en) | 2018-06-29 | 2018-06-29 | A kind of current monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162212A (en) * | 2020-08-17 | 2021-01-01 | 广东电网有限责任公司 | N600 multipoint grounding real-time early warning device and system of PT secondary circuit |
| CN113687266A (en) * | 2021-09-09 | 2021-11-23 | 广东电网有限责任公司 | Measuring and displaying instrument |
-
2018
- 2018-06-29 CN CN201821026035.2U patent/CN208283459U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162212A (en) * | 2020-08-17 | 2021-01-01 | 广东电网有限责任公司 | N600 multipoint grounding real-time early warning device and system of PT secondary circuit |
| CN113687266A (en) * | 2021-09-09 | 2021-11-23 | 广东电网有限责任公司 | Measuring and displaying instrument |
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