CN207866883U - High-frequency current detection device and fault electric arc detecting system - Google Patents
High-frequency current detection device and fault electric arc detecting system Download PDFInfo
- Publication number
- CN207866883U CN207866883U CN201820102383.7U CN201820102383U CN207866883U CN 207866883 U CN207866883 U CN 207866883U CN 201820102383 U CN201820102383 U CN 201820102383U CN 207866883 U CN207866883 U CN 207866883U
- Authority
- CN
- China
- Prior art keywords
- frequency current
- mutual inductance
- frequency
- power supply
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model provides a kind of high-frequency current detection device and fault electric arc detecting system, is related to current detecting field.Wherein, high-frequency current detection device includes high pass filtering device and mutual inductance equipment；The first end of high pass filtering device is connect with power supply buses one end；The first end on mutual inductance equipment sources side and the second end of high pass filtering device connect, and the second end on mutual inductance equipment sources side and the other end of power supply buses connect；Wherein, according to mutual inductance equipment pair while high-frequency current feature determine mutual inductance equipment sources while high-frequency current feature, the high-frequency current feature of power supply buses is determined according to the high-frequency current feature on mutual inductance equipment sources side.The utility model disclosure satisfy that the current detecting of wide dynamic range, ensures that the high-frequency information of electric current will not be lost, improves the performance being detected to the high-frequency current feature of power supply buses.
Description
Technical field
The utility model is related to current detecting fields more particularly to a kind of high-frequency current detection device and fault electric arc to detect
System.
Background technology
In everyday home or commercial power, we detect 220V or 380V forceful electric power electric current and often use two kinds of routine sides
Method：1. resistance sampling method；2. current transformer detection method.For resistance sampling method, low-and high-frequency signal is all very abundant, therefore obtains
Information be most abundant, but the disadvantage is that electric current, which crosses conference, causes resistance heating, and detection circuit is not isolated, and firewire is directly connected to
And zero curve；For current transformer detection method, often in order to which the dominant frequency for meeting 50Hz/60Hz alternating currents requires, high-frequency information meeting
It loses, and electric current crosses conference and magnetic saturation occurs, and leads to distorted signals.
With the development of technology and the improvement of people ’ s living standards, the detection of forceful electric power has been not limited only to traditional
Base current voltage detecting, current detection often relate to current interference waveform, composite wave-shape, transient waveform and high frequency waves
The detection that shape etc. more refines, this just needs the front end sampled to ensure effective passband width, and current detecting dynamic model
Enclosing will greatly, and linear region is wide.Especially for guarantee Electrical Safety, emerging fault electric arc detects (AFDD) equipment, more needs
It will be for the electric current high-frequency information detail detection of pole wide-range current (often 3A~1000A).So, traditional detection side
Method single can not just meet this requirement.
Invention content
A technical problem to be solved in the utility model is to provide a kind of high-frequency current detection device and fault electric arc inspection
Examining system can improve the performance being detected to the high-frequency current feature of power supply buses.
On the one hand according to the utility model, a kind of high-frequency current detection device, including high pass filtering device and mutual inductance are proposed
Equipment；The first end of high pass filtering device is connect with power supply buses one end；The first end on mutual inductance equipment sources side is filled with high-pass filtering
The second end connection set, the second end on mutual inductance equipment sources side and the other end of power supply buses connect；Wherein, according to mutual inductance equipment pair
While high-frequency current feature determine mutual inductance equipment sources while high-frequency current feature, according to the high-frequency current feature on mutual inductance equipment sources side
Determine the high-frequency current feature of power supply buses.
Optionally, high pass filtering device is capacitor.
Optionally, mutual inductance equipment is transformer, mutual inductor or inductance.
Optionally, transformer is high frequency transformer.
Optionally, high frequency transformer is E types transformer or c-type transformer；Mutual inductor is O type mutual inductors；Inductance is I types
Inductance.
Optionally, which further includes：Amplification treatment circuit is connect with mutual inductance equipment pair side.
Optionally, the ratio between the high-frequency current feature of the high-frequency current feature on mutual inductance equipment sources side and power supply buses, with mutual inductance
The turns ratio of equipment square, the secondary side resistance of mutual inductance equipment it is negatively correlated.
Optionally, the ratio between the high-frequency current feature of the high-frequency current feature on mutual inductance equipment sources side and power supply buses, with capacitance
Device capacitance, bus bar resistance and power frequency positive correlation.
Another aspect according to the present utility model, it is also proposed that a kind of fault electric arc detecting system, including above-mentioned high-frequency electrical
Flow assay device.
The utility model, which passes through, is arranged high pass filtering device and mutual inductance equipment, wherein the first end of high pass filtering device with
Power supply buses one end connects, and the first end on mutual inductance equipment sources side and the second end of high pass filtering device connect, mutual inductance equipment sources side
Second end and power supply buses the other end connect, wherein can determine mutually according to the high-frequency current feature on mutual inductance equipment pair side
The high-frequency current feature for feeling equipment sources side, the high frequency of power supply buses is can determine according to the high-frequency current feature on mutual inductance equipment sources side
Current characteristic, the utility model disclosure satisfy that the current detecting of wide dynamic range, ensure that the high-frequency information of electric current will not be lost,
Improve the performance being detected to the high-frequency current feature of power supply buses.
By referring to the drawings to the detailed description of the exemplary embodiment of the utility model, the utility model it is other
Feature and its advantage will become apparent.
Description of the drawings
The attached drawing of a part for constitution instruction describes the embodiments of the present invention, and uses together with the description
In explanation the principles of the present invention.
The utility model can be more clearly understood according to following detailed description with reference to attached drawing, wherein：
Fig. 1 is the structural schematic diagram of one embodiment of the utility model high-frequency current detection device.
Fig. 2 is the structural schematic diagram of another embodiment of the utility model high-frequency current detection device.
Fig. 3 is the structural schematic diagram of the further embodiment of the utility model high-frequency current detection device.
Fig. 4 is the flow diagram of one embodiment of the detection method of the utility model high-frequency current detection device.
Specific implementation mode
The various exemplary embodiments of the utility model are described in detail now with reference to attached drawing.It should be noted that：Unless another
It illustrates outside, the component and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is unlimited
The scope of the utility model processed.
Simultaneously, it should be appreciated that for ease of description, the size of attached various pieces shown in the drawings is not according to reality
Proportionate relationship draw.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality
Novel and its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with specific embodiment, and
With reference to attached drawing, the utility model is further described.
Fig. 1 is the structural schematic diagram of one embodiment of the utility model high-frequency current detection device.It is straight in the embodiment
It connects from one section of both ends power supply buses W and introduces sampling bypass, the shunting using the power supply buses resistance and parallel circuit of very little is special
Property extraction power supply buses high-frequency current feature.Sampling bypass is high-frequency current detection device 100, including high-pass filtering dress
Set 110 and mutual inductance equipment 120.
High pass filtering device 110 is, for example, capacitor, and first end is connect with the one end power supply buses W, second end and mutual inductance
The first end on 120 source side of equipment connects, and high pass filtering device can effectively reduce the energy of low frequency signal.
The second end on 120 source side of mutual inductance equipment is connect with the other end of power supply buses W.Mutual inductance equipment 120 is to utilize utilization
The equipment that electromagnetic induction principle carrys out work, such as can be transformer, mutual inductor or inductance, transformer is specifically as follows high frequency change
Depressor.
In the embodiment, can according to mutual inductance equipment pair while high-frequency current feature determine mutual inductance equipment sources while high-frequency electrical
Feature is flowed, the high-frequency current feature of power supply buses is determined according to the high-frequency current feature on mutual inductance equipment sources side, so as to meet
The current detecting of wide dynamic range ensures that the high-frequency information of electric current will not be lost.
Fig. 2 is the structural schematic diagram of another embodiment of the utility model high-frequency current detection device.In the embodiment,
By taking capacitor C as an example, mutual inductance equipment is introduced high pass filtering device by taking high frequency transformer T as an example.
The first end of capacitor C is connect with the one end power supply buses W, and second end and the first end on the sources high frequency transformer T side connect
It connects, the second end on the sources high frequency transformer T side is connect with the other end of power supply buses W, and high frequency transformer T pairs side can directly connect
The device of detection high-frequency current feature is connect, it can also be as shown in figure 3, first connecting amplification treatment circuit 3, reconnection detects high-frequency electrical
Flow the device of feature.
Due to using bus current bypass sampling, introducing capacitor C, the larger fundamental frequency signal electric current of energy is reduced, later
High-frequency resistance matching transformer T is introduced, while further filtering out low-frequency information, the characteristic of high-frequency signal has been improved, through excessively high
Matched current information is isolated in frequency power transformer, and follow-up amplification Acquisition Circuit is coordinated to detect electric current details.
In the embodiment, according to the high-frequency current feature on high frequency transformer T pairs side, the height on the sources high frequency transformer T side is determined
Frequency current characteristic determines the high-frequency current feature of power supply buses W based on the high-frequency current feature on the sources high frequency transformer T side, below
The correspondence of the sources high frequency transformer T side electric current and power supply buses W electric currents will be introduced.
For example, if the equivalent resistance of power supply buses W is R0；The capacitance of capacitor C is C in measure loop1, high frequency transformation
The coil primary and secondary turn ratio of device T is n；The connect impedance loop in high frequency transformer T pairs side is Z1, the impedance change based on ideal transformer
Characteristic is changed, the side impedance of the sources high frequency transformer T is n2*Z1.Herein it is considered that high frequency transformer T pairs side connects resistive amplifier, input
Resistance is R1.In the case, the sources high frequency transformer T side resistance value is n2*R1。
The impedance that circuit is integrally presentedWherein, // indicate R0With
The impedance that counting circuit is integrally presented in parallel, it is assumed that power supply buses total current is I, and bus bar circuit electric current is I1, inspection
Loop current is surveyed, i.e. the sources high frequency transformer T avris electric current is I2, the impedance according to parallel circuit and electric current inverse relation haveIn turn, the split ratio of measure loop and total current：
I.e.
It can be seen that according to above formula, in mono- timings of total current I, measure loop size of current and power supply buses resistance R0, capacitance
Device capacitance C1, power frequency f positive correlations, with turn ratio n2, high frequency transformer pair side resistance R1It is negatively correlated.Further, if it is electric
Parameter all designs determination in road, then the signal code of measure loop and power frequency f positive correlations.
That is the ratio between the high-frequency current feature of the high-frequency current feature on the sources high frequency transformer T side and power supply buses W becomes with high frequency
Square n of the turns ratio of depressor W2, high frequency transformer W secondary side resistance R1Negative correlation, with condenser capacitance value C1, busbar electricity
Hinder R0With power frequency f positive correlations.
In the embodiment, due to being sampled using bus current bypass, it is therefore not necessary to use specific inspection leakage resistance (such as health
Copper etc.), sampling bypass directly is introduced from one section of power supply buses both ends, utilizes the shunting of the bus bar resistance and parallel circuit of very little
Characteristic substantially reduces sampling loop electric current, reduces the linear region that sampling is improved while loss.In addition, this practicality is new
Type can ensure that the high-frequency information of electric current will not be lost, while realize that high current low-loss and the strong and weak of itself are electrically isolated energy
Power.
In practical applications, simultaneously non-ideal transformer has used high frequency letter to transformer in order to extract the details of high-frequency signal
Number transformer, wherein the materials such as PC40, PC44, the specific amplitude-frequency of high-frequency signal transformer may be used in high-frequency signal transformer
Characteristic curve, primary and secondary the number of turns difference different from different according to magnetic core material.
In one embodiment, high frequency transformer can be that E types are transformer coupled, c-type is transformer coupled, and mutual inductance equipment is also
Can be mutual inductor or inductance, mutual inductor is specially O-shaped mutual inductor coupling, and inductance is specially I type inductive couplings.Wherein, big portion
Point transformer, mutual inductor coupled modes are that closed magnetic circuit couples, and efficiency is very high, but I types inductive coupling is due to magnetic circuit opening,
Coupling efficiency is not high, but magnetic circuit nargin is big, it is not easy to be saturated.
In another embodiment of the utility model, a kind of fault electric arc detecting system, including above-mentioned high-frequency current
Detection device.Wherein, which possesses extremely wide current detecting dynamic range, automatic inhibition high-energy low frequency
Signal improves high-frequency signal signal-to-noise ratio, the details for restoring high-frequency signal, realizes strong and weak be electrically isolated.Such performance especially suitable for
The separation acquisition and processing of high current system high frequency signal, especially suitable for the letter in fault electric arc detecting system (AFDD)
Number analysis.
Fig. 4 is the flow diagram of one embodiment of the detection method of the utility model high-frequency current detection device.Its
In, the structure of high-frequency current detection device can be as shown in Figs. 1-3.
In step 410, the high-frequency current feature on mutual inductance equipment pair side is obtained.Wherein, mutual inductance equipment can be transformer, mutually
Sensor or inductance, transformer are specifically as follows high frequency transformer, and high frequency transformer is, for example, E types transformer or c-type transformer, mutually
It is, for example, I type inductance that sensor, which is, for example, O-shaped mutual inductor, inductance,.
In step 420, based on mutual inductance equipment pair while high-frequency current feature determine mutual inductance equipment sources while high-frequency current it is special
Sign.Mutual inductance equipment pair while high-frequency current feature and mutual inductance equipment sources while the turn ratio with mutual inductance equipment of the ratio between high-frequency current feature
It is related.
Power supply buses are determined based on the correspondence of mutual inductance equipment sources side electric current and power supply buses electric current in step 430
High-frequency current feature.Wherein, the ratio between the high-frequency current feature of the high-frequency current feature on mutual inductance equipment sources side and power supply buses, and it is mutual
Feel the turns ratio of equipment square, the secondary side resistance of mutual inductance equipment it is negatively correlated, with condenser capacitance value, bus bar resistance and electric current
Frequency positive correlation.
In this embodiment, compared with common current detection method, which is able to detect that extremely wide electric current
Detect dynamic range, automatic details, the reality for inhibiting high-energy low frequency signal, improving high-frequency signal signal-to-noise ratio, restoring high-frequency signal
Existing strong and weak electric isolution.Separation acquisition and processing of such performance especially suitable for high current system high frequency signal.
So far, the utility model is described in detail.In order to avoid covering the design of the utility model, this is not described
Some details well known to field.Those skilled in the art as described above, can be appreciated how to implement completely public here
The technical solution opened.
Although some specific embodiments of the utility model are described in detail by example, this field
It is to be understood by the skilled artisans that above example merely to illustrate, rather than in order to limit the scope of the utility model.This
Field it is to be understood by the skilled artisans that can not depart from the scope of the utility model and spirit in the case of, to above example
It modifies.The scope of the utility model is defined by the following claims.
Claims (9)
1. a kind of high-frequency current detection device, which is characterized in that including high pass filtering device and mutual inductance equipment；
The first end of the high pass filtering device is connect with power supply buses one end；
The first end on mutual inductance equipment sources side is connect with the second end of the high pass filtering device, mutual inductance equipment sources side
Second end is connect with the other end of the power supply buses；
Wherein, according to mutual inductance equipment pair while high-frequency current feature determine mutual inductance equipment sources while high-frequency current feature, according to mutual
The high-frequency current feature on sense equipment sources side determines the high-frequency current feature of the power supply buses.
2. high-frequency current detection device according to claim 1, which is characterized in that
The high pass filtering device is capacitor.
3. high-frequency current detection device according to claim 1, which is characterized in that
The mutual inductance equipment is transformer, mutual inductor or inductance.
4. high-frequency current detection device according to claim 3, which is characterized in that
The transformer is high frequency transformer.
5. high-frequency current detection device according to claim 4, which is characterized in that
The high frequency transformer is E types transformer or c-type transformer；
The mutual inductor is O-shaped mutual inductor；
The inductance is I type inductance.
6. according to any high-frequency current detection devices of claim 1-5, which is characterized in that further include：
Amplification treatment circuit is connect with shown mutual inductance equipment pair side.
7. high-frequency current detection device according to claim 2, which is characterized in that
The ratio between the high-frequency current feature on mutual inductance equipment sources side and the high-frequency current feature of the power supply buses, with the mutual inductance
The turns ratio of equipment square, the secondary side resistance of the mutual inductance equipment it is negatively correlated.
8. high-frequency current detection device according to claim 7, which is characterized in that
The ratio between the high-frequency current feature on mutual inductance equipment sources side and the high-frequency current feature of the power supply buses, with capacitor electricity
Capacitance, bus bar resistance and power frequency positive correlation.
9. a kind of fault electric arc detecting system, which is characterized in that set including any high-frequency current detections of claim 1-8
It is standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820102383.7U CN207866883U (en) | 2018-01-22 | 2018-01-22 | High-frequency current detection device and fault electric arc detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820102383.7U CN207866883U (en) | 2018-01-22 | 2018-01-22 | High-frequency current detection device and fault electric arc detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207866883U true CN207866883U (en) | 2018-09-14 |
Family
ID=63462730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820102383.7U Active CN207866883U (en) | 2018-01-22 | 2018-01-22 | High-frequency current detection device and fault electric arc detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207866883U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068720A (en) * | 2018-01-22 | 2019-07-30 | 北京维森科技有限公司 | High-frequency current detection device, method and fault electric arc detection system |
-
2018
- 2018-01-22 CN CN201820102383.7U patent/CN207866883U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068720A (en) * | 2018-01-22 | 2019-07-30 | 北京维森科技有限公司 | High-frequency current detection device, method and fault electric arc detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210071931U (en) | Automatic detection device for B-type residual current size and type | |
| CN108418569A (en) | Differential mode electromagnetic noise injection network and active electromagnetic interference filter | |
| CN105403759A (en) | Leakage current detection circuit for ADC sampling | |
| CN207866883U (en) | High-frequency current detection device and fault electric arc detecting system | |
| CN208172223U (en) | A kind of stray transformer flux detection device | |
| CN205210170U (en) | Supply hourglass current detection circuit of ADC sampling | |
| CN103901252B (en) | 10KV power transmission line zero-sequence current detecting systems | |
| CN204789742U (en) | Voltage sample modulate circuit | |
| CN103247489B (en) | The circuit breaker electronic release of no ground current sample Special mutual-inductor | |
| CN110068720A (en) | High-frequency current detection device, method and fault electric arc detection system | |
| CN101635522A (en) | Switch power supply for powerline carrier communication modem | |
| CN201285409Y (en) | Phase voltage detection circuit | |
| CN109061277A (en) | A kind of zero crossing detection device and detection method based on electromagnetic induction | |
| CN206114759U (en) | Zero -crossing detection circuit | |
| CN106991256A (en) | A kind of non-rice is brilliant, nanocrystalline iron core high frequency transformer impedance design method | |
| CN207489659U (en) | Integrated filter inductance transformer based on circuit coupled method | |
| CN209267452U (en) | Microwave oven supply power circuit and micro-wave oven | |
| CN203723931U (en) | An anti-interference food processor | |
| CN113315249A (en) | Non-blind-area full-size metal foreign matter detection method and device for WPT system | |
| CN207248967U (en) | Device and electric appliance for voltage detecting | |
| CN205141986U (en) | Big current DC filter | |
| CN206236056U (en) | Capacitance touch induced key detects circuit and household electrical appliance | |
| CN207232297U (en) | A kind of ground connection fundamental current transmitter for extra-high voltage transformer iron core | |
| CN108152561A (en) | Igh-speed wire-rod production line circuit | |
| CN105262331A (en) | High current DC filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |