CN202533493U - Current sampling circuit applied to intelligent wireless monitor of distribution line - Google Patents
Current sampling circuit applied to intelligent wireless monitor of distribution line Download PDFInfo
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- CN202533493U CN202533493U CN2012202267583U CN201220226758U CN202533493U CN 202533493 U CN202533493 U CN 202533493U CN 2012202267583 U CN2012202267583 U CN 2012202267583U CN 201220226758 U CN201220226758 U CN 201220226758U CN 202533493 U CN202533493 U CN 202533493U
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Abstract
The utility model discloses a current sampling circuit applied to an intelligent wireless monitor of a distribution line. The current sampling circuit comprises an analogue sampling module, a high-pass signal conditioning module, a low-pass signal conditioning module and a current transformation module, wherein the high-pass signal conditioning module and the low-pass signal conditioning module are connected in parallel between the current transformation module and the analogue sampling module. According to the current sampling circuit, only one current transformation module is adopted for transformation processing, and a discharge current waveform is slightly changed and attenuated, so that the capturing of a grounding current signal is facilitated. The high-pass signal conditioning module and the low-pass signal conditioning module are connected in parallel for filtration processing, and inrush current mainly with high-order harmonics can be filtered through the high-pass signal conditioning module, and cannot be weakened by the high-pass signal conditioning module, so that the measurement sensitivity of the inrush current can be greatly improved.
Description
Technical field
The utility model relates to the intelligent wireless monitor device of distribution line, is meant the current sampling circuit that is applied to the intelligent wireless monitor device of distribution line especially.
Background technology
The intelligent wireless monitor device of distribution line need be installed in aerial condutor, cable or other the relevant enforcement, is used to detect the fault on it.General wireless monitor device comprises an indicator; This indicator comprises a housing; One end opening of this housing, this openend are equipped with the thread jamming part branch that is used to block aerial condutor or cable, are equiped with current sampling circuit, governor circuit, board turning indicating circuit and feed circuit in this housing; These feed circuit are used for to the governor circuit power supply, and this current sampling circuit and board turning indicating circuit are electrically connected with governor circuit respectively.
With reference to accompanying drawing 2.Existing current sampling circuit comprise primary current mutual inductance module 1, the secondary current mutual inductance module 2 that is connected with primary current mutual inductance module 1, the low-pass signal conditioning module 3 that is connected with secondary current mutual inductance module 2 and with the analog sampling module 4 of low-pass signal conditioning module 3.Adopt the electric current on lead or the cable through primary current mutual inductance module 1; The primary current that obtains through once sampling carries out double sampling through secondary current mutual inductance module 2 again; The secondary current that obtains through double sampling carries out low-pass filtering treatment through low-pass signal conditioning module 3 again; Give analog sampling module 4 electric current after the low-pass filtering treatment and sample, deliver to governor circuit to the electric current after the sampling and carry out fault analysis.
Can there be some defectives in above-mentioned current sampling circuit in design; Because sample rate current is the capacitor discharge electric current; After through 1,2 conversion of two primary current mutual inductance modules, discharge current waveform alters a great deal and decays very greatly, is unfavorable for the seizure of ground current signal like this; Only selecting for use 3 pairs of electric currents of low-pass signal conditioning module to carry out Filtering Processing, because of ground current is the capacitor discharge mutation current, is to be main with higher hamonic wave, and low-pass filtering treatment can the attenuated mutant electric current, has reduced the sensitivity that mutation current is measured.
The utility model content
The utility model provides the current sampling circuit that is applied to the intelligent wireless monitor device of distribution line, and its fundamental purpose is to overcome existing current sampling circuit and exists design undesirable, the shortcoming of the poor sensitivity that current signal seizure difficulty and mutation current are measured.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is following:
Be applied to the current sampling circuit of the intelligent wireless monitor device of distribution line; Comprise analog sampling module, high communication number conditioning module, low-pass signal conditioning module and an electric current mutual inductance module, this high and low messenger conditioning module is parallel between electric current mutual inductance module and the analog sampling module.
Aforementioned currents mutual inductance module is for adopting the high magnetic conduction electric current mutual inductance module of high permeability material as iron core.
Can know through above-mentioned description the utility model, and comparing with prior art, the advantage of the utility model is: this current sampling circuit only adopts an electric current mutual inductance module to carry out conversion process; Discharge current waveform changes little and decays for a short time, help the seizure of ground current signal like this, and this electric current mutual inductance module is high magnetic conduction electric current mutual inductance module; Its magnetic conductivity unshakable in one's determination is good; Stray capacitance is relatively large, and this has the certain absorption effect for mutation current, is beneficial to detection.Adopt the mode of high and low messenger conditioning module parallel connection to carry out Filtering Processing; Higher hamonic wave is that main mutation current can carry out Filtering Processing through the high communication number conditioning module; This high communication number conditioning module can the attenuated mutant electric current, can greatly improve the sensitivity that mutation current is measured.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the circuit block diagram of existing current sampling circuit.
Embodiment
The embodiment of the utility model is described with reference to the accompanying drawings.
With reference to Fig. 1.The current sampling circuit that is applied to the intelligent wireless monitor device of distribution line comprises electric current mutual inductance module 1, high communication number conditioning module 2, low-pass signal conditioning module 3 and analog sampling module 4, and this high and low messenger conditioning module 2,3 is parallel between electric current mutual inductance module 1 and the analog sampling module 4.
With reference to Fig. 1.Said electric current mutual inductance module 1 is for adopting the high magnetic conduction electric current mutual inductance module of high permeability material as iron core.The principle of work of this current sampling circuit is: the electric current on lead or the cable adopts through high magnetic conduction electric current mutual inductance module; Comprise the electric current of higher hamonic wave and the electric current of low-order harmonic to the electric current that obtains through over-sampling; The electric current of higher hamonic wave carries out high-pass filtering through high communication number conditioning module 2 to be handled; The electric current of low-order harmonic carries out low-pass filtering treatment through low-pass signal conditioning module 3; Give analog sampling module 4 electric current after the high and low pass filter processing and sample, the electric current after the sampling is delivered to governor circuit and is carried out fault analysis.
The above-mentioned embodiment that is merely the utility model, but the design concept of the utility model is not limited thereto allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should belong to the behavior of invading the utility model protection domain.
Claims (2)
1. be applied to the current sampling circuit of the intelligent wireless monitor device of distribution line; It is characterized in that: comprise analog sampling module, high communication number conditioning module, low-pass signal conditioning module and an electric current mutual inductance module, this high and low messenger conditioning module is parallel between electric current mutual inductance module and the analog sampling module.
2. the current sampling circuit that is applied to the intelligent wireless monitor device of distribution line according to claim 1 is characterized in that: said electric current mutual inductance module is for adopting the high magnetic conduction electric current mutual inductance module of high permeability material as iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202267583U CN202533493U (en) | 2012-05-21 | 2012-05-21 | Current sampling circuit applied to intelligent wireless monitor of distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202267583U CN202533493U (en) | 2012-05-21 | 2012-05-21 | Current sampling circuit applied to intelligent wireless monitor of distribution line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202533493U true CN202533493U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202267583U Expired - Lifetime CN202533493U (en) | 2012-05-21 | 2012-05-21 | Current sampling circuit applied to intelligent wireless monitor of distribution line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202533493U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL424058A1 (en) * | 2017-12-28 | 2019-07-01 | Sonel Spółka Akcyjna | Method for measuring the starting current using the measuring device |
| CN112782540A (en) * | 2020-12-29 | 2021-05-11 | 国网辽宁省电力有限公司鞍山供电公司 | High-voltage cable on-line monitoring and fault point positioning device |
-
2012
- 2012-05-21 CN CN2012202267583U patent/CN202533493U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL424058A1 (en) * | 2017-12-28 | 2019-07-01 | Sonel Spółka Akcyjna | Method for measuring the starting current using the measuring device |
| CN112782540A (en) * | 2020-12-29 | 2021-05-11 | 国网辽宁省电力有限公司鞍山供电公司 | High-voltage cable on-line monitoring and fault point positioning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FUJIAN HONGKE ELECTRIC POWER TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: QUANZHOU KELI ELECTRIC CO., LTD. Effective date: 20150902 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150902 Address after: 362000 Fujian province Quanzhou Fengze District High Technology Industrial Park Road breeding base E building four floor Patentee after: Hong Ke Power Tech Corp. Inc. of Fujian Province Address before: Fengze District of Quanzhou city Fujian province 362000 Shipu Xun Mei Industrial Zone Hardware Factory East building two floor, third floor Patentee before: Quanzhou Keli Electric Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121114 |
|
| CX01 | Expiry of patent term |