CN202110234U - Detection device for three-phase voltage system and chip - Google Patents
Detection device for three-phase voltage system and chip Download PDFInfo
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- CN202110234U CN202110234U CN2011201641387U CN201120164138U CN202110234U CN 202110234 U CN202110234 U CN 202110234U CN 2011201641387 U CN2011201641387 U CN 2011201641387U CN 201120164138 U CN201120164138 U CN 201120164138U CN 202110234 U CN202110234 U CN 202110234U
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- current
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Abstract
The utility model is suitable for the field of circuits, and provides a detection device for a three-phase voltage system and a chip. The device includes a loop current output module used for outputting three-phase voltage loop current respectively, a zero line current output module used for outputting the zero line circuit current, and a current vector and calculation module connected with the loop current output module and the zero line current output module respectively and used for performing the vector operation on the loop current output by the loop current output module and the zero line current output by the zero line current output module. In the embodiment of the utility model, the acquired loop current and zero line current are subjected to the A/D conversion and error correction treatment, the loop current and the zero line current which are corrected are subjected to the vector operation, so as to obtain the total current after the operation, and if the total current is not equal to 0, electric leakage or electricity stealing are judged to exist in the three-phase voltage.
Description
Technical field
The utility model belongs to circuit field, relates in particular to the pick-up unit and the chip of a kind of three-phase electricity system.
Background technology
Be illustrated in figure 1 as the three-phase electricity system, three-phase alternating current is a kind of transporting pattern of electric energy, abbreviates three-phase electricity as.Three-phase alternating-current supply,, amplitude identical by three frequencies equates, the phase place power supply formed of the interchange electromotive force of 120 ° of mutual deviations successively.The purposes of three-phase alternating current is a lot, most AC electric equipment in the industry, and for example motor all adopts three-phase alternating current, and the three-phase four-wire system of just often mentioning (single line is a zero line in addition) in the three-phase electricity system, is established I
hBe the size of total current, I
a, I
b, I
cBe respectively the size of current of loop A, loop B, loop C, I
nBe the size of current of zero line circuit, when not having electric leakage or electricity filching behavior, satisfy I
h=I
a+ I
b+ I
c+ I
n=0.
Existing three-phase electricity detection system is only carried out I
a+ I
b+ I
cVector calculus wherein do not comprise neutral line current, can not detect whether exist in the three-phase electricity system electric leakage or electricity filching behavior.
The utility model content
The purpose of the utility model embodiment is to provide the pick-up unit of a kind of three-phase electricity system, is intended to solve the prior art user and can't judges whether to exist electric leakage or stealing.
The utility model embodiment is achieved in that the pick-up unit of a kind of three-phase electricity system, and said device comprises:
Be used for exporting respectively the loop current output module of three-phase electricity loop current;
Be used to export the neutral line current output module of zero line circuital current;
Be connected with the neutral line current output module with said loop current output module respectively, be used for the loop current and the neutral line current output module of the output of loop current output module are exported current phasor and the computing module that neutral line current carries out vector calculus.
Further, said loop current output module also comprises:
Be used for obtaining the loop current acquisition module of each loop electric current of three-phase electricity;
Be connected with said loop current acquisition module, be used for the electric current that said loop current acquisition module obtains is carried out the loop current modular converter of A/D conversion;
Be connected with said loop current modular converter, be used for the loop current correction module that the electric current that said loop current modular converter is changed is carried out error correction.
Further, said loop current acquisition module also comprises:
Be used for obtaining the loop A electric current acquisition module of loop A electric current;
Be used for obtaining the loop B electric current acquisition module of loop B electric current;
Be used for obtaining the loop C electric current acquisition module of loop C electric current.
Further, said loop current modular converter also comprises:
Be connected with said loop A electric current acquisition module, be used for the electric current that said loop A electric current acquisition module obtains is carried out the loop A current conversion module of A/D conversion;
Be connected with said loop B electric current acquisition module, be used for the electric current that said loop B electric current acquisition module obtains is carried out the loop B current conversion module of A/D conversion;
Be connected with said loop C electric current acquisition module, be used for the electric current that said loop C electric current acquisition module obtains is carried out the loop C current conversion module of A/D conversion.
Further, said loop current correction module also comprises:
Be connected with said loop A current conversion module, be used for the loop A current correction module that the electric current that said loop A current conversion module is changed is carried out error correction;
Be connected with said loop B current conversion module, be used for the loop B current correction module that the electric current that said loop B current conversion module is changed is carried out error correction;
Be connected with said loop C current conversion module, be used for the loop C current correction module that the electric current that said loop C current conversion module is changed is carried out error correction.
Further, said neutral line current output module also comprises:
Be used to obtain the neutral line current acquisition module of neutral line current;
Be connected with said neutral line current acquisition module, be used for the electric current that said neutral line current acquisition module obtains is carried out the neutral line current modular converter of A/D conversion;
Be connected with said neutral line current modular converter, be used for the neutral line current correction module that the electric current that said neutral line current modular converter is changed is carried out error correction.
Another purpose of the utility model embodiment is to provide the detection chip of a kind of three-phase electricity system, and said chip comprises an aforesaid pick-up unit.
In the utility model embodiment; Loop current and neutral line current to obtaining carry out the A/D conversion, and correction processing is carried out vector calculus to loop current and neutral line current through overcorrect; Total current after the acquisition computing; Said total current is a vector that has direction, if the size of total current is not 0, then can judge to have electricity filching behavior in the three-phase electricity.
Description of drawings
Fig. 1 is the three-phase electricity Circuits System that prior art provides.
Fig. 2 is the structural drawing of the detection three-phase electricity device that provides of the utility model embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
In the utility model embodiment; Loop current and neutral line current to obtaining carry out the A/D conversion, and correction processing is carried out vector calculus to loop current and neutral line current through overcorrect; Total current after the acquisition computing; Said total current is a vector that has direction, if the size of total current is not 0, then can judge to have electricity filching behavior in the three-phase electricity.
Be illustrated in figure 2 as the structural drawing of the detection three-phase electricity device that the utility model embodiment provides,, the part relevant with the embodiment of the invention only be shown, comprising for the ease of explanation:
Be used for exporting respectively the loop current output module 21 of three-phase electricity loop current.
Be used to export the neutral line current output module 22 of zero line circuital current.
Be connected with the neutral line current output module with said loop current output module respectively, be used for the loop current and the neutral line current output module of the output of loop current output module are exported current phasor and the computing module 23 that neutral line current carries out vector calculus.
The electric current of current phasor and 23 pairs of three-phase electricity circuit of computing module and zero line band warm current carry out vector calculus, obtain the total current of three-phase electricity circuit.
Wherein loop current output module 21 also comprises:
Be used for obtaining the loop current acquisition module 211 of each loop electric current of three-phase electricity.
Be connected with said loop current acquisition module 211, be used for the electric current that said loop current acquisition module obtains is carried out the loop current modular converter 212 of A/D conversion.
Be connected with said loop current modular converter 212, be used for the loop current correction module 213 that the electric current that said loop current modular converter is changed is carried out error correction.
In loop current correction module 213, the electric current through conversion that obtains is carried out error correction, be 1.9A like the electric current among the A of loop, be 2A then with the current correction among the A of loop; Like the electric current among the B of loop is 3.1A, is 3A with the current correction among the B of loop then, and said correction all belongs to error correction, does not influence the calculating of three-phase electricity effective value.
Wherein said loop current acquisition module 211 also comprises:
Be used for obtaining the loop A electric current acquisition module 2111 of loop A electric current.
Be used for obtaining the loop B electric current acquisition module 2112 of loop B electric current.
Be used for obtaining the loop C electric current acquisition module 2113 of loop C electric current.
About the acquisition methods of loop current, not within the protection domain of the utility model, and belong to those skilled in the art's common practise about the acquisition methods of loop current, no longer give unnecessary details here.
Wherein loop current modular converter 212 also comprises:
Be connected with said loop A electric current acquisition module 2111, be used for the electric current that said loop A electric current acquisition module obtains is carried out the loop A current conversion module 2121 of A/D conversion;
Be connected with said loop B electric current acquisition module 2112, be used for the electric current that said loop B electric current acquisition module obtains is carried out the loop B current conversion module 2122 of A/D conversion;
Be connected with said loop C electric current acquisition module 2113, be used for the electric current that said loop C electric current acquisition module obtains is carried out the loop C current conversion module 2123 of A/D conversion.
Wherein loop current correction module 213 also comprises:
Be connected with said loop A current conversion module 2121, be used for the loop A current correction module 2131 that the electric current that said loop A current conversion module is changed is carried out error correction;
Be connected with said loop B current conversion module 2122, be used for the loop B current correction module 2132 that the electric current that said loop B current conversion module is changed is carried out error correction;
Be connected with said loop C current conversion module 2123, be used for the loop C current correction module 2133 that the electric current that said loop C current conversion module is changed is carried out error correction.
Neutral line current output module 22 is used to export the electric current of zero line.
Wherein neutral line current output module 22 also comprises:
Be used to obtain the neutral line current acquisition module 221 of neutral line current;
Be connected with said neutral line current acquisition module 221, be used for the electric current that said neutral line current acquisition module obtains is carried out the neutral line current modular converter 222 of A/D conversion;
Be connected with said neutral line current modular converter 222, be used for the neutral line current correction module 223 that the electric current that said neutral line current modular converter is changed is carried out error correction.
It is to be noted that in practical application neutral line current still is that loop current all is difficult to reach 0, thus in practical application when neutral line current or loop current are 0, all use a very little value to replace.
In the utility model embodiment; Loop current and neutral line current to obtaining carry out the A/D conversion; Correction processing is carried out vector calculus to loop current and neutral line current through overcorrect, the total current after the acquisition computing; If the size of total current is not 0, then can judge to have electric leakage or electricity filching behavior in the three-phase electricity.
Illustrate:
In the three-phase electricity system, establish I
hBe the size of total current, I
a, I
b, I
cBe respectively the size of current of loop A, loop B, loop C, I
nBe the size of current of zero line circuit, when not having electricity filching behavior, satisfy I
h=I
a+ I
b+ I
c+ I
n=0;
When having electricity filching behavior, establish through detecting I
a=0.5A, I
b=1A, I
c=1A, I
n=0A can draw I through vector calculus
h=0.5A.
The utility model also provides the detection chip of a kind of three-phase electricity system, comprises the pick-up unit of three-phase electricity system as shown in Figure 2.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (7)
1. the pick-up unit of a three-phase electricity system is characterized in that, said device comprises:
Be used for exporting respectively the loop current output module of three-phase electricity loop current;
Be used to export the neutral line current output module of zero line circuital current;
Be connected with the neutral line current output module with said loop current output module respectively, be used for the loop current and the neutral line current output module of the output of loop current output module are exported current phasor and the computing module that neutral line current carries out vector calculus.
2. device as claimed in claim 1 is characterized in that, said loop current output module also comprises:
Be used for obtaining the loop current acquisition module of each loop electric current of three-phase electricity;
Be connected with said loop current acquisition module, be used for the electric current that said loop current acquisition module obtains is carried out the loop current modular converter of A/D conversion;
Be connected with said loop current modular converter, be used for the loop current correction module that the electric current that said loop current modular converter is changed is carried out error correction.
3. device as claimed in claim 2 is characterized in that, said loop current acquisition module also comprises:
Be used for obtaining the loop A electric current acquisition module of loop A electric current;
Be used for obtaining the loop B electric current acquisition module of loop B electric current;
Be used for obtaining the loop C electric current acquisition module of loop C electric current.
4. device as claimed in claim 2 is characterized in that, said loop current modular converter also comprises:
Be connected with said loop A electric current acquisition module, be used for the electric current that said loop A electric current acquisition module obtains is carried out the loop A current conversion module of A/D conversion;
Be connected with said loop B electric current acquisition module, be used for the electric current that said loop B electric current acquisition module obtains is carried out the loop B current conversion module of A/D conversion;
Be connected with said loop C electric current acquisition module, be used for the electric current that said loop C electric current acquisition module obtains is carried out the loop C current conversion module of A/D conversion.
5. device as claimed in claim 2 is characterized in that, said loop current correction module also comprises:
Be connected with said loop A current conversion module, be used for the loop A current correction module that the electric current that said loop A current conversion module is changed is carried out error correction;
Be connected with said loop B current conversion module, be used for the loop B current correction module that the electric current that said loop B current conversion module is changed is carried out error correction;
Be connected with said loop C current conversion module, be used for the loop C current correction module that the electric current that said loop C current conversion module is changed is carried out error correction.
6. device as claimed in claim 1 is characterized in that, said neutral line current output module also comprises:
Be used to obtain the neutral line current acquisition module of neutral line current;
Be connected with said neutral line current acquisition module, be used for the electric current that said neutral line current acquisition module obtains is carried out the neutral line current modular converter of A/D conversion;
Be connected with said neutral line current modular converter, be used for the neutral line current correction module that the electric current that said neutral line current modular converter is changed is carried out error correction.
7. the detection chip of a three-phase electricity system comprises a pick-up unit as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201641387U CN202110234U (en) | 2011-05-20 | 2011-05-20 | Detection device for three-phase voltage system and chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201641387U CN202110234U (en) | 2011-05-20 | 2011-05-20 | Detection device for three-phase voltage system and chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202110234U true CN202110234U (en) | 2012-01-11 |
Family
ID=45435680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201641387U Ceased CN202110234U (en) | 2011-05-20 | 2011-05-20 | Detection device for three-phase voltage system and chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202110234U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478881A (en) * | 2017-08-16 | 2017-12-15 | 深圳市思达仪表有限公司 | Three-phase electric energy meter by-pass current detection method and its system |
| CN109030935A (en) * | 2018-08-10 | 2018-12-18 | 国网湖南省电力有限公司 | A kind of three-phase and four-line intelligent meter of independent measurement neutral line current |
| CN111537772A (en) * | 2020-05-19 | 2020-08-14 | 广东电网有限责任公司东莞供电局 | Electricity larceny prevention and false wiring prevention electric energy meter and electricity larceny prevention and false wiring prevention method |
| CN111580010A (en) * | 2020-05-29 | 2020-08-25 | 广东电网有限责任公司 | 0.4kV electric leakage measuring method |
-
2011
- 2011-05-20 CN CN2011201641387U patent/CN202110234U/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478881A (en) * | 2017-08-16 | 2017-12-15 | 深圳市思达仪表有限公司 | Three-phase electric energy meter by-pass current detection method and its system |
| CN107478881B (en) * | 2017-08-16 | 2020-08-11 | 深圳市思达仪表有限公司 | Three-phase electric energy meter bypass current detection method and system |
| CN109030935A (en) * | 2018-08-10 | 2018-12-18 | 国网湖南省电力有限公司 | A kind of three-phase and four-line intelligent meter of independent measurement neutral line current |
| CN111537772A (en) * | 2020-05-19 | 2020-08-14 | 广东电网有限责任公司东莞供电局 | Electricity larceny prevention and false wiring prevention electric energy meter and electricity larceny prevention and false wiring prevention method |
| CN111580010A (en) * | 2020-05-29 | 2020-08-25 | 广东电网有限责任公司 | 0.4kV electric leakage measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN RUINENG MICRO-TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN RENERGY TECHNOLOGY CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong city of Shenzhen province Nanshan District South Road No. 97 Huaying building room A201 Patentee after: Shenzhen ruineg micro Polytron Technologies Inc Address before: 518000 Guangdong city of Shenzhen province Nanshan District South Road No. 97 Huaying building room A201 Patentee before: Shenzhen Renergy Technology Co.,Ltd. |
|
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20160527 Decision number of declaring invalidation: 29160 Granted publication date: 20120111 |