CN102830326B - Method and system for wire checking of wireless metering secondary circuit - Google Patents
Method and system for wire checking of wireless metering secondary circuit Download PDFInfo
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- CN102830326B CN102830326B CN201110162753.9A CN201110162753A CN102830326B CN 102830326 B CN102830326 B CN 102830326B CN 201110162753 A CN201110162753 A CN 201110162753A CN 102830326 B CN102830326 B CN 102830326B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005086 pumping Methods 0.000 claims description 70
- 230000000052 comparative effect Effects 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000005284 excitation Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000004069 differentiation Effects 0.000 description 2
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- 235000013399 edible fruits Nutrition 0.000 description 1
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Abstract
The invention provides a method and a system for wire checking of a wireless metering secondary circuit, and is used for solving the problems of unreliable judgment and low efficiency because a manual judgment manner is adopted for judging wire misconnection of a primarily installed electric energy meter in the metering secondary circuit. The method comprises the steps of: injecting an excitation signal to a leading-out terminal of a mutual inductor in the secondary circuit; collecting the excitation signal of the leading-in terminal of the electric energy meter in the secondary circuit to the ground and the excitation signal of the leading-out terminal of the electric energy meter to the ground; carrying out signal intensity comparison on the excitation signal of the leading-in terminal of the electric energy meter to the ground and the excitation signal of the leading-out terminal of the electric energy meter to the ground to obtain a signal intensity comparison result; and determining the polarity of the mutual inductor in the secondary circuit according to the signal intensity comparison result. By adopting the technical scheme of the invention, the accuracy and efficiency for judging the wire misconnection of the primarily installed electric energy meter are favorably improved.
Description
Technical field
The present invention relates to a kind of wireless metering secondary core line method and system.
Background technology
When installing at present electric energy meter in metering secondary, often easily wrong is from the wire of current transformer, voltage transformer (VT), and typical situation has that the line of current transformer connects instead, the wire of the separate wrong of wire of current transformer, current transformer and voltage transformer (VT) is obscured.
In the prior art, because the installation of electric energy meter is in power down mode, the equipment such as tester cannot be used to carry out error connection differentiation, usual employing one and the on-off type alarming horn of serial battery identify that the wire from mutual inductor is current outlet end or return terminal, and listen the size of speaker sound to make differentiation by ear.
Above-mentioned way conventionally, to also exist under power down mode and inefficient problem low to the judgement reliability of the just wiring of dress electric energy meter.
In the prior art, the artificial mode judged is adopted to the judgement of the first dress wrong wiring of electric energy meter in metering secondary, causes judging unreliable and inefficient problem, for this problem, not yet propose effective solution at present.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of wireless metering secondary core line method and system, to solve in prior art, the artificial mode judged is adopted to the judgement of the first dress wrong wiring of electric energy meter in metering secondary, cause judging unreliable and inefficient problem.
In order to solve the problem, according to an aspect of the present invention, a kind of wireless metering secondary core line method is provided.
The method of wireless metering secondary core line of the present invention comprises: in secondary circuit, the leading-out terminal of mutual inductor injects pumping signal; Gather end of incoming cables pumping signal over the ground and the leading-out terminal pumping signal over the ground of electric energy meter of electric energy meter in secondary circuit; Carry out signal power to the end of incoming cables pumping signal over the ground of electric energy meter with the leading-out terminal pumping signal over the ground of electric energy meter to compare, obtain the strong and weak comparative result of signal; According to the polarity of mutual inductor in signal strong and weak comparative result determination secondary circuit.
Further, the unique data code representing mutual inductor is comprised in pumping signal.
Further, carry out signal power to the end of incoming cables pumping signal over the ground of electric energy meter with the leading-out terminal pumping signal over the ground of electric energy meter to compare, also comprise after obtaining the strong and weak comparative result of signal: parse the data code in the pumping signal that in the strong and weak comparative result of signal, signal is strong.
Further, also comprise after parsing the data code in the pumping signal that in the strong and weak comparative result of signal, signal is strong: according to the classification of the data code determination mutual inductor parsed.
Further, also comprise after parsing the data code in the pumping signal that in the strong and weak comparative result of signal, signal is strong: separate according to the data code determination mutual inductor parsed.
Further, mutual inductor is current transformer or voltage transformer (VT).
In order to solve the problem, according to a further aspect in the invention, a kind of wireless metering secondary core wire system is provided.
Wireless metering secondary core wire system of the present invention comprises: pumping signal injection device, and the leading-out terminal for mutual inductor in secondary circuit injects pumping signal; Pumping signal acquisition module, for gathering end of incoming cables pumping signal over the ground and the leading-out terminal pumping signal over the ground of electric energy meter of electric energy meter in secondary circuit; Pumping signal compares module, carries out signal power compare the end of incoming cables pumping signal over the ground of electric energy meter with the leading-out terminal pumping signal over the ground of electric energy meter, obtains the strong and weak comparative result of signal; Polarity determination module, according to the polarity of mutual inductor in signal strong and weak comparative result determination secondary circuit.
Further, system also comprises: data code parsing module, for parsing the data code in pumping signal that in the strong and weak comparative result of signal, signal is strong.
Further, system also comprises: the classification determination module of mutual inductor, for judging the classification of mutual inductor according to parsed data code.
Further, system also comprises: the classification determination module of mutual inductor, for judging the separate of mutual inductor according to parsed data code.
According to technical scheme of the present invention, by injecting pumping signal to the leading-out terminal of mutual inductor in secondary circuit, carry out signal power to it after the leading-out terminal of the end of incoming cables gathering electric energy meter in secondary circuit pumping signal over the ground and electric energy meter pumping signal over the ground to compare, obtain the strong and weak comparative result of signal, finally according to this method of the polarity of comparative result determination mutual inductor, realized by computing machine, need not additionally wiring, speed is fast and accurate rate is high; Simultaneously can realize judging fast and automatically, accurately to the separate of mutual inductor and classification according to the data code in pumping signal, and multichannel can be realized differentiate simultaneously.
Accompanying drawing explanation
Figure of description is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the line schematic diagram of the secondary circuit detected according to the wireless metering secondary core line method of the embodiment of the present invention;
Fig. 2 is the process flow diagram of the key step of wireless metering secondary core line method according to the embodiment of the present invention; And
Fig. 3 is the schematic diagram of the main modular of wireless metering secondary core wire system according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Fig. 1 is the line schematic diagram of the secondary circuit detected according to the wireless metering secondary core line method of the embodiment of the present invention, and preferably, Fig. 1 shows the connection mode of the secondary circuit of the current transformer of single-item electric energy meter.
As shown in Figure 1, the end of incoming cables c of electric energy meter 11 is connected with return terminal b with the leading-out terminal a of current transformer 12 by wire 13 respectively with leading-out terminal d.
Wireless metering secondary core line method of the present invention can also detect the line of the secondary circuit of the voltage transformer (VT) of single-item electric energy meter, and detects the line of the current transformer of Heterogeneous electric energy meter or the secondary circuit of voltage transformer (VT).
Fig. 2 is the process flow diagram of the key step of wireless metering secondary core line method according to the embodiment of the present invention, to be detected as example to the line of the secondary circuit shown in Fig. 1, introduces wireless metering secondary core line method key step of the present invention in detail.
As shown in Figure 2, the method mainly comprises the steps:
Step S22: the leading-out terminal a of current transformer 12 injects pumping signal in secondary circuit.
In the present embodiment, signal excitation set can be adopted to inject pumping signal at the leading-out terminal a of current transformer in secondary circuit 12, and this pumping signal includes the unique data code representing current transformer 12.
Step S24: the end of incoming cables c pumping signal over the ground and the leading-out terminal d pumping signal over the ground of electric energy meter that gather electric energy meter 11 in secondary circuit.
In the present embodiment, the wiring identification equipment of the acquisition and processing of pumping signal all by being arranged on electric energy meter 11 side carries out.
Step S26: carry out signal power to the end of incoming cables c pumping signal over the ground of electric energy meter 11 with the leading-out terminal d pumping signal over the ground of electric energy meter 11 and compare, obtains the strong and weak comparative result of signal.
Step S28: according to the polarity of current transformer 12 in signal strong and weak comparative result determination secondary circuit, the leading-out terminal a of what one end that namely in the strong and weak comparative result of signal, signal is strong was corresponding is current transformer 12, that the weak one end of signal is corresponding is current transformer 12 return terminal b, thus judges the polarity of current transformer 12.
Owing to including the unique data code representing current transformer 12 in the pumping signal in step S22, the classification of current transformer 12 and separate, specific as follows after step S26, can also be judged:
1) data code in the pumping signal that in the strong and weak comparative result of signal, signal is strong is parsed;
2) according to the classification of data code determination current transformer 12 and separate, namely pumping signal is from which current transformer.
For voltage transformer (VT), then judge pumping signal is from which voltage transformer (VT) according to data code, whether error connection can also to be judged between current transformer and voltage transformer (VT).The separate of current transformer place can also be judged for multinomial electric energy meter.
For three-phase three-wire electric energy meter, 4 pumping signals can be injected on current transformer or voltage transformer (VT) and detect; For three-phase and four-line electric energy meter, then can inject 6 pumping signals on current transformer or voltage transformer (VT) and detect.For avoiding interference, multichannel pumping signal under the control of the computer automatic cycle timesharing is injected, and sentences toe-in fruit at the wiring identification end of electric energy meter according to polarity, separate display.
Fig. 3 is the schematic diagram of the main modular of wireless metering secondary core wire system according to the embodiment of the present invention, and as shown in Figure 3, this system 30 mainly comprises as lower module:
Pumping signal injection device 31, the leading-out terminal for mutual inductor in secondary circuit injects pumping signal.
Pumping signal acquisition module 32, for gathering end of incoming cables pumping signal over the ground and the leading-out terminal pumping signal over the ground of electric energy meter of electric energy meter in secondary circuit.
Pumping signal compares module 33, carries out signal power compare the end of incoming cables pumping signal over the ground of electric energy meter with the leading-out terminal pumping signal over the ground of electric energy meter, obtains the strong and weak comparative result of signal.
Polarity determination module 34, according to the polarity of mutual inductor in signal strong and weak comparative result determination secondary circuit.
The system 30 of Fig. 3 can also comprise:
Data code parsing module, for parsing the data code in pumping signal that in the strong and weak comparative result of signal, signal is strong.
The classification determination module of mutual inductor, for judging the classification of mutual inductor according to parsed data code.
The separate determination module of mutual inductor, for judging the separate of mutual inductor according to parsed data code.
As seen from the above description, wireless metering secondary core line method of the present invention and system, pumping signal is injected by the leading-out terminal at mutual inductor, carry out signal power to it after the leading-out terminal of the end of incoming cables gathering electric energy meter in secondary circuit pumping signal over the ground and electric energy meter pumping signal over the ground to compare, obtain the strong and weak comparative result of signal, finally according to the polarity of comparative result determination mutual inductor, and judge the separate of mutual inductor and classification according to the data code in pumping signal, multichannel can be realized to differentiate simultaneously simultaneously, realized by computing machine, need not additionally wiring, speed is fast and accurate rate is high.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a wireless metering secondary core line method, is characterized in that, comprising:
Steps A: the leading-out terminal of mutual inductor injects pumping signal in secondary circuit;
Step B: the end of incoming cables pumping signal over the ground and the leading-out terminal pumping signal over the ground of described electric energy meter that gather electric energy meter in described secondary circuit;
Step C: carry out signal power to the end of incoming cables pumping signal over the ground of described electric energy meter with the leading-out terminal pumping signal over the ground of described electric energy meter and compare, obtains the strong and weak comparative result of signal;
Step D: the polarity determining mutual inductor in described secondary circuit according to the strong and weak comparative result of described signal.
2. wireless metering secondary core line method according to claim 1, is characterized in that, the pumping signal injected at the leading-out terminal of described mutual inductor comprises the unique data code representing described mutual inductor.
3. wireless metering secondary core line method according to claim 2, is characterized in that, also comprise after step C:
Parse the described data code in the pumping signal that in the strong and weak comparative result of described signal, signal is strong.
4. wireless metering secondary core line method according to claim 3, is characterized in that, described in parse in the described pumping signal that in the strong and weak comparative result of described signal, signal is strong described data code after also comprise:
The classification of described mutual inductor is determined according to the described data code parsed.
5. wireless metering secondary core line method according to claim 3, is characterized in that, described in parse in the described pumping signal that in the strong and weak comparative result of described signal, signal is strong described data code after also comprise:
Described data code according to parsing determines the separate of described mutual inductor.
6. wireless metering secondary core line method according to any one of claim 1 to 5, it is characterized in that, described mutual inductor is current transformer or voltage transformer (VT).
7. a wireless metering secondary core wire system, is characterized in that, comprising:
Pumping signal injection device, the leading-out terminal for mutual inductor in secondary circuit injects pumping signal;
Pumping signal acquisition module, for gathering end of incoming cables pumping signal over the ground and the leading-out terminal pumping signal over the ground of described electric energy meter of electric energy meter in described secondary circuit;
Pumping signal compares module, carries out signal power compare the end of incoming cables pumping signal over the ground of described electric energy meter with the leading-out terminal pumping signal over the ground of described electric energy meter, obtains the strong and weak comparative result of signal;
Polarity determination module, determines the polarity of mutual inductor in described secondary circuit according to the strong and weak comparative result of described signal.
8. wireless metering secondary core wire system according to claim 7, it is characterized in that, described system also comprises:
Data code parsing module, for parsing the described data code in pumping signal that in the strong and weak comparative result of described signal, signal is strong.
9. wireless metering secondary core wire system according to claim 8, it is characterized in that, described system also comprises:
The classification determination module of mutual inductor, for judging the classification of described mutual inductor according to parsed described data code.
10. wireless metering secondary core wire system according to claim 8, it is characterized in that, described system also comprises:
The separate determination module of mutual inductor, determines the separate of described mutual inductor according to parsed described data code.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110162753.9A CN102830326B (en) | 2011-06-16 | 2011-06-16 | Method and system for wire checking of wireless metering secondary circuit |
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| CN201110162753.9A CN102830326B (en) | 2011-06-16 | 2011-06-16 | Method and system for wire checking of wireless metering secondary circuit |
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| CN102830326B true CN102830326B (en) | 2015-04-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107202935B (en) * | 2017-07-04 | 2023-09-01 | 西安热工研究院有限公司 | Automatic alignment system and method for secondary circuit of transformer |
| CN110082703A (en) * | 2019-05-22 | 2019-08-02 | 国网重庆市电力公司电力科学研究院 | A kind of power distribution network metering device second loop return wiring detection method and device |
| CN111505558B (en) * | 2020-04-29 | 2022-08-12 | 国网北京市电力公司 | Method and device for identifying pincerlike current transformer, storage medium and processor |
| CN111650538B (en) * | 2020-05-29 | 2022-07-26 | 深圳供电局有限公司 | Electric energy meter wiring detection device and method |
| CN111650535B (en) * | 2020-05-29 | 2022-07-15 | 深圳供电局有限公司 | Electric energy meter wiring detection method |
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