CN104678213A - Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type mutual inductor - Google Patents
Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type mutual inductor Download PDFInfo
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- CN104678213A CN104678213A CN201510055884.5A CN201510055884A CN104678213A CN 104678213 A CN104678213 A CN 104678213A CN 201510055884 A CN201510055884 A CN 201510055884A CN 104678213 A CN104678213 A CN 104678213A
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- mutual inductor
- balance type
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- type mutual
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Abstract
The invention relates to an electric quantity digitizer based on a DSP (Digital Signal Processor) and a magnetic balance type mutual inductor. The digitizer is connected with a power grid and comprises the magnetic balance type mutual inductor and an DSP chip which are connected to each other; the DSP module comprises a detection circuit, a processing circuit and an inhibiting signal output circuit which are sequentially connected; the input end of the detection circuit is connected with the magnetic balance type mutual inductor; the output end of the inhibiting signal output circuit is connected with the magnetic balance type mutual inductor; the magnetic balance type mutual inductor is connected with the power grid. Compared with the prior art, the electric quantity digitizer is reasonable in design and simple in structure, and the magnetic balance type mutual inductor is directly connected with the DSP control chip to each other without the need of additionally arranging an AD (Analog-to-Digital) conversion device; owing to low power consumption, high operation precision and real-time fast data processing capability of the magnetic balance type mutual inductor and the DSP control chip, the electric energy quality is monitored in real time while the detection precision is effectively improved.
Description
Technical field
The present invention relates to a kind of electricity digitizer, especially relate to a kind of electricity digitizer based on DSP and magnetic balance type mutual inductor.
Background technology
At present, power quality problem has become the advanced subject of electrical engineering area research, its set electron technology, and multiple subject such as the communication technology and computer technology is in one, and its research level also signifies the national status of scientific and technological level in the world.The lifting of quality of power supply investigative technique is all a Gospel for electrical network and power consumer, because it relates to the every aspect of national product and people's daily life, can help electric company in planning, correctly improve the foundation structure of electricity supplying and using system for Utilities Electric Co. especially, improve system cloud gray model stability and reasonably expand system capacity and determine investment level, there is important pool meaning.And by the continuous monitoring of electrical network associate power parameter and record, set up the efficient database that can characterize the quality of power supply, and can look-ahead failure message, remind the safe condition of people to electricity supply and use equipment to overhaul, be conducive to loss to be reduced to minimum.Microcontroller science and technology fast development simultaneously, particularly along with the development and apply of DSP, makes the quality of power supply be improved in detection, monitoring and analysis etc., and then is conducive to the problem and the rule that find customer power supply, improve the quality of power supply.
Summary of the invention
Object of the present invention is exactly provide a kind of electricity digitizer based on DSP and magnetic balance type mutual inductor improving measuring accuracy to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of electricity digitizer based on DSP and magnetic balance type mutual inductor, this converter is connected with electrical network, it is characterized in that, described converter comprises interconnective magnetic balance type mutual inductor and dsp chip, described DSP module comprises the testing circuit, treatment circuit and the suppression signal output apparatus that connect successively, described testing circuit input end is connected with magnetic balance type mutual inductor, described suppression signal output apparatus output terminal is connected with magnetic balance type mutual inductor, and described magnetic balance type mutual inductor is connected with electrical network.
Described magnetic balance type mutual inductor comprises two, be respectively the first magnetic balance type mutual inductor and the second magnetic balance type mutual inductor, the input end of the first described magnetic balance type mutual inductor is directly connected with electrical network, the input end of the second described magnetic balance type mutual inductor is connected with electrical network by resistance, and the output terminal of two magnetic balance type mutual inductors is all connected with testing circuit.
Described testing circuit comprises current detection circuit and voltage detecting circuit, and described current detection circuit is connected with the first magnetic balance type mutual inductor, and described voltage detecting circuit is connected with the second magnetic balance type mutual inductor.
Each magnetic balance type mutual inductor includes three windings, be respectively the first winding, the second winding and the tertiary winding, the first described winding is connected with electrical network, and the second described winding is connected with testing circuit, and the described tertiary winding is connected with suppression signal output apparatus.
Described treatment circuit, to the process of electric signal, comprises; Calculate electric current, voltage, power and power factor value, and FFT conversion is carried out to the signal gathered, calculate each harmonic content.
Compared with prior art, the present invention is reasonable in design, and structure is simple, without the need to adding peripheral hardware a/d conversion device, by magnetic balance type mutual inductor directly and DSP control chip interconnect; By magnetic balance type mutual inductor and the low-power consumption of DSP control chip, high operational precision and data-handling capacity real-time, while effectively improving accuracy of detection, the Real-Time Monitoring quality of power supply.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
Signal voltage in electrical network is all 220V/380V voltage or higher, utilizes existing electronic installation to measure, and more difficultly directly measures, and winding coil induction current can be utilized power network signal to be become the current signal that can survey and be sent in device.The present invention adopts magnetic balance type mutual inductor.Power network signal is linked into the primary coil of magnetic balance type mutual inductor, is linked into dsp chip by the induction current produced, completes the detection to current signal; After changing mains voltage signal into current signal by series connection resistance R, concrete size can be recorded by a magnetic balance type mutual inductor equally.
As shown in Figure 1, electricity digitizer of the present invention, comprise interconnective magnetic balance type mutual inductor and DSP module chip 3, described dsp chip 3 comprises the testing circuit, treatment circuit 33 and the suppression signal output apparatus 34 that connect successively, described testing circuit input end and magnetic balance type mutual inductor second winding switching, described suppression signal output apparatus output terminal is connected with the magnetic balance type mutual inductor tertiary winding, and described magnetic balance type mutual inductor is connected with electrical network.
Described magnetic balance type mutual inductor comprises two, be respectively the first magnetic balance type mutual inductor 1 and the second magnetic balance type mutual inductor 2, the input end of the first described magnetic balance type mutual inductor 1 is directly connected with electrical network, the input end of the second described magnetic balance type mutual inductor 2 is connected with electrical network by resistance, and the output terminal of two magnetic balance type mutual inductors is all connected with testing circuit.
Described testing circuit comprises current detection circuit 31 and voltage detecting circuit 32, and described current detection circuit 31 is connected with the first magnetic balance type mutual inductor 1, and described voltage detecting circuit 32 is connected with the second magnetic balance type mutual inductor 2.
Each magnetic balance type mutual inductor includes three windings, be respectively the first winding, the second winding and the tertiary winding, the first described winding is connected with electrical network, and the second described winding is connected with testing circuit, and the described tertiary winding is connected with suppression signal output apparatus.
In Fig. 1, the first magnetic balance type mutual inductor 1 is for current detecting, if the triple coil number of turn is respectively n
10, n
11, n
12; Second magnetic balance type mutual inductor 2 is for voltage detecting, if it establishes triple coil, the number of turn is respectively n
20, n
21, n
22.Second winding of two magnetic balance type mutual inductors is connected with DSP control chip, detects induction current size i
1, i
2.According to induction current i
1, i
2size, the suppression current signal i that adjustment dsp chip exports
3, i
4, cancelling out each other in the magnetic field allowing tertiary winding coil produce in magnetism gathering rings and the magnetic field produced of first, second coil, thus makes i
1, i
2be 0.
Utilize dsp chip realization to the collection of electric signal and data processing, obtain the parameter values such as electric current, voltage, active power, utilize FFT, Hilbert scheduling algorithm calculates each harmonic content, reactive power and power factor simultaneously.And by Software for Design, sequential control and calculating, transmission process are carried out to links.
Simultaneously it is emphasized that this instructions is chosen and specifically described embodiment, be for explaining principle of the present invention and practical application better, thus, the preferred embodiment of the present invention is illustrative, does not limit this and invents in described embodiment.Obviously, according to the content of this instructions, embodiment can do various change.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (5)
1. the electricity digitizer based on DSP and magnetic balance type mutual inductor, this converter is connected with electrical network, it is characterized in that, described converter comprises interconnective magnetic balance type mutual inductor and dsp chip, described DSP module comprises the testing circuit, treatment circuit and the suppression signal output apparatus that connect successively, described testing circuit input end is connected with magnetic balance type mutual inductor, described suppression signal output apparatus output terminal is connected with magnetic balance type mutual inductor, and described magnetic balance type mutual inductor is connected with electrical network.
2. a kind of electricity digitizer based on DSP and magnetic balance type mutual inductor according to claim 1, it is characterized in that, described magnetic balance type mutual inductor comprises two, be respectively the first magnetic balance type mutual inductor and the second magnetic balance type mutual inductor, the input end of the first described magnetic balance type mutual inductor is directly connected with electrical network, the input end of the second described magnetic balance type mutual inductor is connected with electrical network by resistance, and the output terminal of two magnetic balance type mutual inductors is all connected with testing circuit.
3. a kind of electricity digitizer based on DSP and magnetic balance type mutual inductor according to claim 2, it is characterized in that, described testing circuit comprises current detection circuit and voltage detecting circuit, described current detection circuit is connected with the first magnetic balance type mutual inductor, and described voltage detecting circuit is connected with the second magnetic balance type mutual inductor.
4. a kind of electricity digitizer based on DSP and magnetic balance type mutual inductor according to claim 2, it is characterized in that, each magnetic balance type mutual inductor includes three windings, be respectively the first winding, the second winding and the tertiary winding, the first described winding is connected with electrical network, the second described winding is connected with testing circuit, and the described tertiary winding is connected with suppression signal output apparatus.
5. a kind of electricity digitizer based on DSP and magnetic balance type mutual inductor according to claim 1, it is characterized in that, described treatment circuit is to the process of electric signal, comprise: calculate electric current, voltage, power and power factor value, and FFT conversion is carried out to the signal gathered, calculate each harmonic content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510055884.5A CN104678213A (en) | 2015-02-03 | 2015-02-03 | Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510055884.5A CN104678213A (en) | 2015-02-03 | 2015-02-03 | Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type mutual inductor |
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| Publication Number | Publication Date |
|---|---|
| CN104678213A true CN104678213A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510055884.5A Pending CN104678213A (en) | 2015-02-03 | 2015-02-03 | Electric quantity digitizer based on DSP (Digital Signal Processor) and magnetic balance type mutual inductor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004069466A (en) * | 2002-08-06 | 2004-03-04 | Kyoritsu Electrical Instruments Works Ltd | Electric current measuring device |
| CN102193021A (en) * | 2010-02-23 | 2011-09-21 | 阿尔卑斯绿色器件株式会社 | Current sensor |
| CN102279305A (en) * | 2011-04-13 | 2011-12-14 | 大连丰和电力科技有限公司 | Closed loop magnetic balance type Hall current sensor |
| CN202256455U (en) * | 2011-10-12 | 2012-05-30 | 长沙南车电气设备有限公司 | Magnetic balanced type Hall current sensor |
| CN104297565A (en) * | 2014-10-24 | 2015-01-21 | 上海交通大学 | Electric quantity digital converter based on FPGA and magnetic balance type Hall sensor |
| CN104297564A (en) * | 2014-10-24 | 2015-01-21 | 上海交通大学 | Electric quantity digital converter based on FPGA and magnetic balance type mutual inductor |
-
2015
- 2015-02-03 CN CN201510055884.5A patent/CN104678213A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004069466A (en) * | 2002-08-06 | 2004-03-04 | Kyoritsu Electrical Instruments Works Ltd | Electric current measuring device |
| CN102193021A (en) * | 2010-02-23 | 2011-09-21 | 阿尔卑斯绿色器件株式会社 | Current sensor |
| CN102279305A (en) * | 2011-04-13 | 2011-12-14 | 大连丰和电力科技有限公司 | Closed loop magnetic balance type Hall current sensor |
| CN202256455U (en) * | 2011-10-12 | 2012-05-30 | 长沙南车电气设备有限公司 | Magnetic balanced type Hall current sensor |
| CN104297565A (en) * | 2014-10-24 | 2015-01-21 | 上海交通大学 | Electric quantity digital converter based on FPGA and magnetic balance type Hall sensor |
| CN104297564A (en) * | 2014-10-24 | 2015-01-21 | 上海交通大学 | Electric quantity digital converter based on FPGA and magnetic balance type mutual inductor |
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Application publication date: 20150603 |