CN203825088U - Harmonic-wave detection device - Google Patents
Harmonic-wave detection device Download PDFInfo
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- CN203825088U CN203825088U CN201420082004.4U CN201420082004U CN203825088U CN 203825088 U CN203825088 U CN 203825088U CN 201420082004 U CN201420082004 U CN 201420082004U CN 203825088 U CN203825088 U CN 203825088U
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- sampling signal
- voltage sampling
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Abstract
The utility model provides a harmonic-wave detection device which includes a Rogowski current transformer, a voltage sampling circuit, a signal conditioning circuit and a micro control unit. The signal conditioning circuit is connected with a Rogowski coil of the Rogowski current transformer so as to obtain current sampling signals and connected with the voltage sampling circuit so as to obtain voltage sampling signals and then processes and outputs the current sampling signals and the voltage sampling signals. The micro control unit is connected with an output end of the signal conditioning unit so as to receive the current sampling signals and the voltage sampling signals and then completes digital integration, digital filtering and harmonic-wave operation on the current sampling signals and completes digital filtering and harmonic-wave operation on the voltage sampling signals. The harmonic-wave detection device adopts the Rogowski current transformer to sample current signals. The current sampling signals have the characteristics of being wide in bandwidth, fast in response, free from saturation and almost free from phase difference so that harmonic wave components of a line which is high in waveform distortion can be accurately measured.
Description
Technical field
The utility model relates to harmonic detecting technique field, relates in particular to a kind of harmonic measurement device.
Background technology
Now, widespread use due to the electronic product of frequency converter, soft initiator, Switching Power Supply, cause the harmonic pollution of electrical network serious, and the current sample of harmonic measurement device on market partly uses, it is the current transformer of iron core type, this kind of mutual inductor easily saturated, low-response, phase differential is large, particularly the current transformer of iron core type is designed to based on power frequency work, for the radio-frequency component of harmonic wave class, has the natural low effect of cutting, and causes measurement result and actual conditions to have deviation.
Utility model content
The technical problems to be solved in the utility model is: for the mutual inductor that solves the iron core type current transformer that the current sample of harmonic measurement device of the prior art partly the adopts problems such as easily saturated, low-response, phase differential be large, the utility model provides a kind of harmonic measurement device to adopt rogowski current transformer to sample and solve the problems referred to above current signal.
The utility model solves the technical scheme that its technical matters adopts: a kind of harmonic measurement device, comprise rogowski current transformer, voltage sampling circuit, signal conditioning circuit and micro-control unit,
Described signal conditioning circuit, is connected to obtain current sampling signal with the Luo-coil of rogowski current transformer, is connected to obtain voltage sampling signal with voltage sampling circuit, and current sampling signal and voltage sampling signal are processed and exported;
Described micro-control unit, be connected with the output terminal of described signal conditioning circuit, receive described current sampling signal and voltage sampling signal, and described current sampling signal is completed to digital integration, digital filtering, harmonic wave computing, and voltage sampling signal is completed to digital filtering, harmonic wave computing.
Concrete, described micro-control unit also comprises DSP functional module, for described current sampling signal being completed to digital integration, digital filtering, harmonic wave computing.
Further, described signal conditioning circuit comprises amplifying circuit and the anti-coupled circuit for current sampling signal and voltage sampling signal are processed.
As preferably, described micro-control unit is also connected with display device, and described micro-control unit outputs to described display device to the operation result of current sampling signal and voltage sampling signal, and shows in described display device.
As preferably, described micro-control unit is also connected with for by the long-range communication module spreading out of of the operation result of current sampling signal and voltage sampling signal.
The beneficial effects of the utility model are, this harmonic measurement device adopts rogowski current transformer to sample to current signal, current sampling signal has is not with wide, response soon, can saturated, almost not dephased feature, the harmonic components of can Measurement accuracy wave form distortion large circuit.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the frame diagram of the optimum embodiment of the utility model harmonic measurement device.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model is only described in a schematic way, so it only show the formation relevant with the utility model.
As shown in Figure 1, the utility model provides a kind of harmonic measurement device, comprises rogowski current transformer, voltage sampling circuit, signal conditioning circuit and micro-control unit,
Signal conditioning circuit, is connected to obtain current sampling signal with the Luo-coil of rogowski current transformer, is connected to obtain voltage sampling signal with voltage sampling circuit, and current sampling signal and voltage sampling signal are processed and exported;
Micro-control unit, be connected with the output terminal of signal conditioning circuit, received current sampled signal and voltage sampling signal, and current sampling signal is completed to digital integration, digital filtering, harmonic wave computing, and voltage sampling signal is completed to digital filtering, harmonic wave computing;
Micro-control unit also comprises DSP functional module, for current sampling signal being completed to digital integration, digital filtering, harmonic wave computing;
Signal conditioning circuit comprises amplifying circuit and the anti-coupled circuit for current sampling signal and voltage sampling signal are processed;
Micro-control unit is also connected with display device, and micro-control unit outputs to display device to the operation result of current sampling signal and voltage sampling signal, and shows in display device;
Micro-control unit is also connected with for by the long-range communication module spreading out of of the operation result of current sampling signal and voltage sampling signal.
The above-mentioned foundation desirable embodiment of the present utility model of take is enlightenment, and by above-mentioned description, relevant staff can, within not departing from the scope of this utility model technological thought, carry out various change and modification completely.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to claim scope.
Claims (5)
1. a harmonic measurement device, is characterized in that: comprise rogowski current transformer, voltage sampling circuit, signal conditioning circuit and micro-control unit,
Described signal conditioning circuit, is connected to obtain current sampling signal with the Luo-coil of rogowski current transformer, is connected to obtain voltage sampling signal with voltage sampling circuit, and current sampling signal and voltage sampling signal are processed and exported;
Described micro-control unit, be connected with the output terminal of described signal conditioning circuit, receive described current sampling signal and voltage sampling signal, and described current sampling signal is completed to digital integration, digital filtering, harmonic wave computing, and voltage sampling signal is completed to digital filtering, harmonic wave computing.
2. harmonic measurement device as claimed in claim 1, is characterized in that: described micro-control unit also comprises DSP functional module, for described current sampling signal being completed to digital integration, digital filtering, harmonic wave computing.
3. harmonic measurement device as claimed in claim 1, is characterized in that: described signal conditioning circuit comprises amplifying circuit and the anti-coupled circuit for current sampling signal and voltage sampling signal are processed.
4. harmonic measurement device as claimed in claim 1, it is characterized in that: described micro-control unit is also connected with display device, described micro-control unit outputs to described display device to the operation result of current sampling signal and voltage sampling signal, and shows in described display device.
5. harmonic measurement device as claimed in claim 1, is characterized in that: described micro-control unit is also connected with for by the long-range communication module spreading out of of the operation result of current sampling signal and voltage sampling signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420082004.4U CN203825088U (en) | 2014-02-25 | 2014-02-25 | Harmonic-wave detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420082004.4U CN203825088U (en) | 2014-02-25 | 2014-02-25 | Harmonic-wave detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825088U true CN203825088U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420082004.4U Expired - Fee Related CN203825088U (en) | 2014-02-25 | 2014-02-25 | Harmonic-wave detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203825088U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869159A (en) * | 2014-02-25 | 2014-06-18 | 苏州美高立电气有限公司 | Harmonic detection device |
| CN105067881A (en) * | 2015-07-24 | 2015-11-18 | 淄博格瑞恩电气科技有限公司 | Harmonic detection-based electrical safety monitoring method |
| CN105826900A (en) * | 2016-05-17 | 2016-08-03 | 广东南丰电气自动化有限公司 | Microcomputer protection device capable of efficiently protecting brushless excitation generator |
-
2014
- 2014-02-25 CN CN201420082004.4U patent/CN203825088U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869159A (en) * | 2014-02-25 | 2014-06-18 | 苏州美高立电气有限公司 | Harmonic detection device |
| CN105067881A (en) * | 2015-07-24 | 2015-11-18 | 淄博格瑞恩电气科技有限公司 | Harmonic detection-based electrical safety monitoring method |
| CN105826900A (en) * | 2016-05-17 | 2016-08-03 | 广东南丰电气自动化有限公司 | Microcomputer protection device capable of efficiently protecting brushless excitation generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20190225 |