CN101718831A - Method and device for detecting phase line of three-phase four-wire power transmission line - Google Patents
Method and device for detecting phase line of three-phase four-wire power transmission line Download PDFInfo
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- CN101718831A CN101718831A CN200910230021A CN200910230021A CN101718831A CN 101718831 A CN101718831 A CN 101718831A CN 200910230021 A CN200910230021 A CN 200910230021A CN 200910230021 A CN200910230021 A CN 200910230021A CN 101718831 A CN101718831 A CN 101718831A
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Abstract
The invention discloses a method for detecting a phase line of a three-phase four-wire power transmission line, comprising the following steps of: detecting a voltage zero crossing time of each phase line of the three-phase four-wire power transmission line at any position of the three-phase four-wire power transmission line; generating a power carrier signal containing code information representing every phase line; inputting the power carrier signal to the three-phase four-wire power transmission line at the voltage zero crossing time; detecting the voltage zero crossing time of any phase line of the three-phase four-wire power transmission line at any position of the three-phase four-wire power transmission line; extracting and demodulating the power carrier signal at the voltage zero crossing time; and acquiring a corresponding relationship among the three-phase four-wire power transmission line according to the demodulated code information. The invention also discloses a device for detecting the phase line of the three-phase four-wire power transmission line and solves the problems of lacking of simple real-time online means, inconvenient implementation, diseconomy and the like in the prior art during determining the corresponding relationship of the phase lines at different positions of the three-phase four-wire power transmission line.
Description
Technical field
The present invention relates to the transmission line of electricity detection range, relate in particular to a kind of phase line of three-phase four-wire power transmission line detection method and device.
Background technology
In low-voltage network, transmission line of electricity generally adopts three-phase four-wire system, i.e. three-phase and four-line transmission line of electricity, and wherein three-line is represented A, B, C three-phase respectively, and another is a zero line.
Because the three-phase and four-line transmission line of electricity is when entering the user, what the user located to insert is single-phase transmission line of electricity, and the user does not understand what enter the user is A, B, in the C three-phase which, if the unidirectional transmission line of electricity at user place breaks down in the time of maybe need transforming and keep in repair, also unclear in the three-phase and four-line transmission line of electricity is A actually, B, fault has taken place and maybe need transform and keep in repair in the C three-phase which mutually, the technical scheme that adopt present this area is with A, B, the C three-phase cuts off simultaneously, then user's phase line that fault has taken place is keeped in repair, or with A, B, the C three-phase cuts off in order, powering-off state with reference to all the other users, that the user that judgement is broken down locates to insert is A, B, which phase in the C three-phase, and the problem that adopts this scheme to bring is, can influence other users and normally use transmission line of electricity, and need the time to obtain the feedback information of needs from different users, can cause director's user time to cut off the power supply like this, thereby bring economic loss to the user.In the three phase line that comprises whole three-phase phase lines, want to determine the phase line corresponding relation of a certain position, also can bring similar inconvenience, problem such as uneconomical.For convenient management, management of power use department wishes to grasp real-time and easily the consumer and the electricity consumption situation thereof of each phase line, and consumer need be discerned self place phase line, lacks simple and practical recognition methods at present.
PLC technology has obtained widespread use in the communications field, and correlation technique is full-fledged, from the cost angle, adopt PLC technology carry out phase line detect have in real time, convenient, equipment is simple, the economic dispatch characteristics.
Summary of the invention
The embodiment of the invention provides a kind of phase line of three-phase four-wire power transmission line detection method and device, lack simple real-time online means to solve the phase line corresponding relation of determining three-phase and four-line transmission line of electricity diverse location place in the prior art, implement problems such as inconvenient, uneconomical.
For achieving the above object, the embodiment of the invention provides a kind of phase line of three-phase four-wire power transmission line detection method, comprising:
The voltage zero-cross of any each phase line of position probing three-phase and four-line transmission line of electricity constantly on the three-phase and four-line transmission line of electricity;
Produce power carrier signal, described power carrier signal comprises code information representing every phase line;
, described power carrier signal is input on the described three-phase and four-line transmission line of electricity constantly the time at the voltage zero-cross of described phase line transmission;
The voltage zero-cross that detects described phase line in any position of arbitrary phase line of described three-phase and four-line transmission line of electricity constantly;
Voltage zero-cross in described arbitrary phase line extracts described power carrier signal constantly, and the power carrier signal of extracting is carried out demodulation;
According to the coded message that obtains after the demodulation process, obtain corresponding relation between the phase line of respective three-phase four line transmission lines of electricity.
The embodiment of the invention also provides a kind of phase line of three-phase four-wire power transmission line pick-up unit, is used for determining corresponding relation between the phase line of three-phase and four-line transmission line of electricity, and described device comprises:
The power carrier signal input equipment is used to produce the power carrier signal of the coded message of carrying each phase line of representing the three-phase and four-line transmission line of electricity respectively, and described power carrier signal is input on each phase line of the defeated four line electric line of described three-phase;
Power carrier signal receives checkout equipment, be used to receive described power carrier signal, and determine that according to the power carrier signal that receives power carrier signal input equipment place described in the described three-phase and four-line transmission line of electricity and described power carrier signal receive the phase line corresponding relation between the checkout equipment place.
Described power carrier signal input equipment comprises:
Voltage zero-cross is extraction module constantly, is used to extract the voltage zero-cross moment on each phase line of three-phase and four-line transmission line of electricity, and produces the described zero passage of representative zero cross signal constantly;
Signal generating module is used to produce the power carrier signal of the coded message of carrying each phase line of representing the three-phase and four-line transmission line of electricity;
Signal selection module is used to receive the described voltage zero-cross zero cross signal that produces of extraction module constantly, selects the power carrier signal corresponding with corresponding phase line according to the zero cross signal of isopen not;
Coupling module, the described power carrier signal coupling after being used for described signal selection module handled is input to each phase line of the arbitrary position of three-phase and four-line transmission line of electricity.
Described power carrier signal receives checkout equipment and comprises:
Zero passage is extraction module constantly, is used for the voltage zero-cross moment that the arbitrary phase line of described three-phase and four-line transmission line of electricity was detected and extracted in arbitrary position on described three-phase and four-line transmission line of electricity, and the described zero passage of generation representative zero cross signal constantly;
Coupling module is used for the described power carrier signal of coupling reception on arbitrary phase line of described three phase line;
The signal gating module is used to receive the power carrier signal after described coupling module is handled, and according to described zero cross signal described power carrier signal is carried out gating and handle;
Demodulation module is used to receive the power carrier signal after described signal gating resume module, and the described power carrier signal that receives is carried out demodulation process;
Obtain the phase line identification module, be used to receive the power carrier signal after described demodulation module is handled, obtain the coded message of each phase line of described representative three-phase and four-line transmission line of electricity according to described power carrier signal, determine corresponding relation between the phase line of respective three-phase four line transmission lines of electricity according to described coded message.
Corresponding relation between the described phase line of determining the three-phase and four-line transmission line of electricity according to described coded message, specifically comprise:, then described phase line is judged to be the A phase line if the described coded message that obtains after the demodulation is the coded message of the phase line A of representative three-phase and four-line transmission line of electricity; If the described coded message that obtains after the demodulation is the coded message of the phase line B of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the B phase line; If the described coded message that obtains after the demodulation is the coded message of the phase line C of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the C phase line.
In the embodiment of the invention, by the power application ZAP, can determine corresponding relation between the phase line of three-phase and four-line transmission line of electricity simply and easily, and in testing process, do not influence other users and normally use transmission line of electricity, have the accuracy height, save time, detect the low beneficial effect of cost.
Description of drawings
Fig. 1 is the phase line of three-phase four-wire power transmission line detection method process flow diagram in the embodiment of the invention;
Fig. 2 is the phase line of three-phase four-wire power transmission line pick-up unit synoptic diagram in the embodiment of the invention;
Fig. 3 is the power carrier signal input equipment synoptic diagram in the embodiment of the invention;
Fig. 4 is that the power carrier signal in the embodiment of the invention receives the checkout equipment synoptic diagram;
Embodiment
The embodiment of the invention provides a kind of phase line of three-phase four-wire power transmission line detection method and device, and corresponding relation between the phase line of the definite three-phase and four-line transmission line of electricity of realization has greatly improved detection speed, and reduced the detection cost.
Below in conjunction with the drawings and specific embodiments phase line of three-phase four-wire power transmission line detection method provided by the invention and device are elaborated.
The method that embodiments of the invention provide a kind of phase line of three-phase four-wire power transmission line to detect as shown in Figure 1, comprising:
Step s101, arbitrarily the voltage zero-cross of each phase line of position probing three-phase and four-line transmission line of electricity is constantly on the three-phase and four-line transmission line of electricity.
Concrete, the voltage zero-cross of any each phase line of position probing three-phase and four-line transmission line of electricity is before the moment on the three-phase and four-line transmission line of electricity, also comprise: determine the pairing coded message of each phase line of three-phase and four-line transmission line of electricity, wherein coded message comprises: with A, B, C triple-phase line corresponding codes, the phase line corresponding codes can adopt binary coding modes such as ASCII, only need guarantee to represent the coded message of triple-phase line effectively to distinguish.
Step s102, generation power carrier signal, wherein power carrier signal comprises code information representing every phase line.
Concrete, by modulation, make power carrier signal carry coded message.
Step s103, constantly the time, power carrier signal is input on the three-phase and four-line transmission line of electricity at the voltage zero-cross that reaches the phase line transmission that step s101 obtains.
Concrete, wherein, power carrier signal can arrive A phase voltage zero passage during the moment against the direction transmission of three-phase and four-line transmission line of electricity transmission voltage, and the power carrier signal that will comprise A phase coded message is input on the three-phase and four-line transmission line of electricity; Arrive B phase voltage zero passage during the moment, the power carrier signal that will comprise B phase coded message is input on the three-phase and four-line transmission line of electricity; Arrive C phase voltage zero passage during the moment, the power carrier signal that will comprise C phase coded message is input on the three-phase and four-line transmission line of electricity.
Step s104, detect this phase line in any position of arbitrary phase line of three-phase and four-line transmission line of electricity voltage zero-cross constantly.
Step s105, the voltage zero-cross of arbitrary phase line extracts power carrier signal constantly in step s104, and the power carrier signal of extracting is carried out demodulation.
Concrete, according to the voltage zero-cross moment of detected phase line among the step s104, only the voltage zero-cross of arbitrary phase line receives power carrier signal constantly in step s104, and all the other do not receive power carrier signal constantly.
Step s106, according to the coded message that obtains after the step s105 demodulation process, obtain corresponding relation between the phase line of respective three-phase four line transmission lines of electricity.
Concrete, if the described coded message that obtains after the demodulation is the coded message of the phase line A of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the A phase line;
If the described coded message that obtains after the demodulation is the coded message of the phase line B of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the B phase line;
If the described coded message that obtains after the demodulation is the coded message of the phase line C of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the C phase line;
Simultaneously, the device that the embodiment of the invention also provides a kind of phase line of three-phase four-wire power transmission line to detect is used to the method that realizes that the embodiment of the invention provides, as shown in Figure 2, specifically comprises:
Power carrier signal input equipment 21 is used to produce the power carrier signal of the coded message of carrying each phase line of representing the three-phase and four-line transmission line of electricity respectively, and power carrier signal is input on each phase line of the defeated four line electric line of three-phase;
Power carrier signal receives checkout equipment 22, be used to receive the power carrier signal that power carrier signal input equipment 21 produces, and determine the phase line corresponding relation between the power carrier signal input equipment place and power carrier signal reception checkout equipment place in the three-phase and four-line transmission line of electricity according to the power carrier signal that receives.
As shown in Figure 3, power carrier signal input equipment 21 specifically comprises:
Voltage zero-cross is extraction module 31 constantly, be used to extract the voltage zero-cross moment on each phase line of three-phase and four-line transmission line of electricity, and zero passage zero cross signal is constantly represented in generation;
Concrete, signal generating module 32 is by modulating, power carrier signal is carried the coded message of representing each phase line of three-phase and four-line transmission line of electricity;
As shown in Figure 4, power carrier signal receives checkout equipment 22, specifically comprises:
Zero passage is extraction module 41 constantly, be used for the voltage zero-cross moment that the arbitrary phase line of three-phase and four-line transmission line of electricity was detected and extracted in arbitrary position on the three-phase and four-line transmission line of electricity, and zero passage zero cross signal is constantly represented in generation;
Coupling module 42 is used for coupling reception power carrier signal on arbitrary phase line of three phase line;
Signal gating module 43 is used to receive the power carrier signal after coupling module 42 is handled, and according to zero cross signal power carrier signal is carried out gating and handle;
Demodulation module 44 is used to receive the power carrier signal after signal gating module 43 is handled, and the power carrier signal that receives is carried out demodulation process.
Obtain phase line identification module 45, be used to receive the power carrier signal after demodulation module 44 is handled, obtain to represent the coded message of each phase line of three-phase and four-line transmission line of electricity according to power carrier signal, and determine corresponding relation between the phase line of respective three-phase four line transmission lines of electricity according to coded message.
Concrete, obtain phase line identification module 45 and determine corresponding relation between the phase line of respective three-phase four line transmission lines of electricity according to coded message, specifically comprise:
If the described coded message that obtains after the demodulation is the coded message of the phase line A of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the A phase line;
If the described coded message that obtains after the demodulation is the coded message of the phase line B of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the B phase line;
If the described coded message that obtains after the demodulation is the coded message of the phase line C of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the C phase line.
It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although type of the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.
Claims (10)
1. a phase line of three-phase four-wire power transmission line detection method is characterized in that, comprising:
The voltage zero-cross of any each phase line of position probing three-phase and four-line transmission line of electricity constantly on the three-phase and four-line transmission line of electricity;
Produce power carrier signal, described power carrier signal comprises code information representing every phase line;
, described power carrier signal is input on the described three-phase and four-line transmission line of electricity constantly the time at the voltage zero-cross of described phase line transmission;
The voltage zero-cross that detects described phase line in any position of arbitrary phase line of described three-phase and four-line transmission line of electricity constantly;
Voltage zero-cross in described arbitrary phase line extracts described power carrier signal constantly, and the power carrier signal of extracting is carried out demodulation;
According to the coded message that obtains after the demodulation process, obtain corresponding relation between the phase line of respective three-phase four line transmission lines of electricity.
2. phase line of three-phase four-wire power transmission line detection method as claimed in claim 1 is characterized in that, the voltage zero-cross of each phase line of position probing three-phase and four-line transmission line of electricity also comprised before the moment arbitrarily on the three-phase and four-line transmission line of electricity:
Determine the pairing coded message of described each phase line of three-phase and four-line transmission line of electricity, described coded message comprises: with A, B, C triple-phase line corresponding codes.
3. as claim 1,2 described phase line of three-phase four-wire power transmission line detection methods, it is characterized in that described power carrier signal specifically comprises:
By modulation, make described power carrier signal carry described coded message.
4. phase line of three-phase four-wire power transmission line detection method as claimed in claim 1 is characterized in that, described described power carrier signal is input on the described three-phase and four-line transmission line of electricity, comprising:
Arrive A phase voltage zero passage during the moment, the power carrier signal that will comprise A phase coded message is input on the three-phase and four-line transmission line of electricity;
Arrive B phase voltage zero passage during the moment, the power carrier signal that will comprise B phase coded message is input on the three-phase and four-line transmission line of electricity;
Arrive C phase voltage zero passage during the moment, the power carrier signal that will comprise C phase coded message is input on the three-phase and four-line transmission line of electricity.
5. the phase line of three-phase four-wire power transmission line detection method described in claim 1 is characterized in that, extracts described power carrier signal constantly at the voltage zero-cross of described arbitrary phase line, comprising:
Only the voltage zero-cross in described arbitrary phase line receives power carrier signal constantly, and all the other do not receive described power carrier signal constantly.
6. the phase line of three-phase four-wire power transmission line detection method described in claim 1 is characterized in that, and is described according to the coded message that obtains after the demodulation process, obtains corresponding relation between the phase line of respective three-phase four line transmission lines of electricity, comprising:
If the described coded message that obtains after the demodulation is the coded message of the phase line A of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the A phase line;
If the described coded message that obtains after the demodulation is the coded message of the phase line B of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the B phase line;
If the described coded message that obtains after the demodulation is the coded message of the phase line C of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the C phase line;
7. a phase line of three-phase four-wire power transmission line pick-up unit is characterized in that, comprising:
The power carrier signal input equipment is used to produce the power carrier signal of the coded message of carrying each phase line of representing the three-phase and four-line transmission line of electricity respectively, and described power carrier signal is input on each phase line of the defeated four line electric line of described three-phase;
Power carrier signal receives checkout equipment, be used to receive described power carrier signal, and determine that according to the power carrier signal that receives power carrier signal input equipment place described in the described three-phase and four-line transmission line of electricity and described power carrier signal receive the phase line corresponding relation between the checkout equipment place.
8. phase line of three-phase four-wire power transmission line pick-up unit as claimed in claim 7 is characterized in that, described power carrier signal input equipment comprises:
Voltage zero-cross is extraction module constantly, is used to extract the voltage zero-cross moment on each phase line of three-phase and four-line transmission line of electricity, and produces the described zero passage of representative zero cross signal constantly;
Signal generating module is used to produce the power carrier signal of the coded message of carrying each phase line of representing the three-phase and four-line transmission line of electricity;
Signal selection module is used to receive the described voltage zero-cross zero cross signal that produces of extraction module constantly, selects the power carrier signal corresponding with corresponding phase line according to the zero cross signal of isopen not;
Coupling module, the described power carrier signal coupling after being used for described signal selection module handled is input to each phase line of the arbitrary position of three-phase and four-line transmission line of electricity.
9. as claim 7 or 8 described phase line of three-phase four-wire power transmission line pick-up units, it is characterized in that described power carrier signal receives checkout equipment and comprises:
Zero passage is extraction module constantly, is used for the voltage zero-cross moment that the arbitrary phase line of described three-phase and four-line transmission line of electricity was detected and extracted in arbitrary position on described three-phase and four-line transmission line of electricity, and the described zero passage of generation representative zero cross signal constantly;
Coupling module is used for the described power carrier signal of coupling reception on arbitrary phase line of described three phase line;
The signal gating module is used to receive the power carrier signal after described coupling module is handled, and according to described zero cross signal described power carrier signal is carried out gating and handle;
Demodulation module is used to receive the power carrier signal after described signal gating resume module, and the described power carrier signal that receives is carried out demodulation process;
Obtain the phase line identification module, be used to receive the power carrier signal after described demodulation module is handled, obtain the coded message of each phase line of described representative three-phase and four-line transmission line of electricity according to described power carrier signal, determine corresponding relation between the phase line of respective three-phase four line transmission lines of electricity according to described coded message, corresponding relation between the described phase line of determining the three-phase and four-line transmission line of electricity according to described coded message, comprise:, then described phase line is judged to be the A phase line if the described coded message that obtains after the demodulation is the coded message of the phase line A of representative three-phase and four-line transmission line of electricity; If the described coded message that obtains after the demodulation is the coded message of the phase line B of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the B phase line; If the described coded message that obtains after the demodulation is the coded message of the phase line C of representative three-phase and four-line transmission line of electricity, then described phase line is judged to be the C phase line.
10. phase line of three-phase four-wire power transmission line pick-up unit as claimed in claim 8 is characterized in that, described signal generating module makes described power carrier signal carry described coded message by modulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910230021A CN101718831A (en) | 2009-11-05 | 2009-11-05 | Method and device for detecting phase line of three-phase four-wire power transmission line |
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| CN200910230021A CN101718831A (en) | 2009-11-05 | 2009-11-05 | Method and device for detecting phase line of three-phase four-wire power transmission line |
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Cited By (7)
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| CN103944607A (en) * | 2014-04-14 | 2014-07-23 | 江苏益邦电力科技有限公司 | Low voltage power line carrier communication signal detection device |
| CN104122482A (en) * | 2014-08-06 | 2014-10-29 | 国网上海市电力公司 | System and method of line recognition adopting power line carrier communication |
| CN105374197A (en) * | 2015-11-19 | 2016-03-02 | 国家电网公司 | Low voltage district electric energy meter phase line identification method |
| CN106781412A (en) * | 2016-12-26 | 2017-05-31 | 青岛东软载波科技股份有限公司 | A kind of method for solving the affiliated platform area acquisition of information of ammeter |
| CN107040283A (en) * | 2016-02-04 | 2017-08-11 | 杭州炬华科技股份有限公司 | One kind is based on power carrier data transmission circuit |
| CN112098771A (en) * | 2020-08-04 | 2020-12-18 | 国网湖南省电力有限公司 | Ground wire state monitoring system |
| CN117949743A (en) * | 2024-03-26 | 2024-04-30 | 四川英杰新能源有限公司 | Phase line detection method |
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| CN105374197A (en) * | 2015-11-19 | 2016-03-02 | 国家电网公司 | Low voltage district electric energy meter phase line identification method |
| CN107040283A (en) * | 2016-02-04 | 2017-08-11 | 杭州炬华科技股份有限公司 | One kind is based on power carrier data transmission circuit |
| CN106781412A (en) * | 2016-12-26 | 2017-05-31 | 青岛东软载波科技股份有限公司 | A kind of method for solving the affiliated platform area acquisition of information of ammeter |
| CN112098771A (en) * | 2020-08-04 | 2020-12-18 | 国网湖南省电力有限公司 | Ground wire state monitoring system |
| CN117949743A (en) * | 2024-03-26 | 2024-04-30 | 四川英杰新能源有限公司 | Phase line detection method |
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