CN107102289B - A kind of measurement loop wiring error judgment method and device - Google Patents
A kind of measurement loop wiring error judgment method and device Download PDFInfo
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- CN107102289B CN107102289B CN201710462582.9A CN201710462582A CN107102289B CN 107102289 B CN107102289 B CN 107102289B CN 201710462582 A CN201710462582 A CN 201710462582A CN 107102289 B CN107102289 B CN 107102289B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Abstract
The application discloses a kind of measurement loop wiring error judgment method and device, this method are specifically included that by during cycle emitting voltage/current test signal；Obtain the cycle quantity of the test signal and the correspondence cycle start-phase of the test signal；Receive feedback signal；Obtain the cycle quantity of the feedback signal；According to the cycle quantity of the cycle quantity of the test signal and the feedback signal, the judgement signal that phase isopen is in the test signal is filtered out；Obtain the correspondence cycle start-phase of the judgement signal；According to the correspondence cycle start-phase of the correspondence cycle start-phase of the test signal and the judgement signal, wiring correctness is judged；Output test result.The problem of can effectively solve the problem that existing detection method low efficiency.
Description
Technical field
This application involves technical field of electrical measurement more particularly to a kind of measurement loop wiring error judgment method and dresses
It sets.
Background technique
Electric energy metering device includes metering voltage, current transformer and its secondary circuit, electric energy metering cabinet etc., is used for
Hair in power generation, between, three departments, amount of electrical power is calculated to measuring, when electric energy metering device correct wiring
Guarantee the necessary condition of accurate measurement, electric energy metering device must carry out wiring check before operation.
Before not coming into operation for new clothes electric energy metering device, due to cannot directly carry out charging operation, so cannot be according to
Field device is held in the palm to differentiate the wiring correctness of new clothes electric energy metering device.Generally use the artificial on-off function for using multimeter
The wiring correctness for judging new clothes electric energy metering device needs to disconnect secondary circuit and electricity during verifying wiring correctness
Pressure/current transformer coupling part.Disconnecting conducting wire causes physical state at conductor compression jointing to change, since site environment is mixed and disorderly,
The problems such as being easy to appear conducting wire virtual connection, miss or touch adjacent conductor position, generating short circuit, open circuit.
Different location locating for electric energy metering device, there are different practical problems.Electrical energy measurement in plant stand side is filled
It sets, since secondary circuit distance is longer, needs several staff when checking wiring correctness, and need to connect to be formed into a loop
Ground line, but can only be linked up by telecommunication between plant stand and controllers, it is easy to appear mistake, causes to check and lose
It loses；For being in the electric energy metering device of customer side, since the design of electric energy metering cabinet is generally very narrow, to work on the spot people
The activity of member causes many restrictions, and batch meter is typically mounted on rack eminence, increases the work that staff disconnects conducting wire
Industry difficulty.
Summary of the invention
The application provides a kind of measurement loop wiring error judgment method and device, to solve existing detection method low efficiency
The problem of.
In a first aspect, this application provides a kind of measurement loop wiring error judgment methods, this method comprises:
By during cycle emitting voltage/current test signal；
Obtain the cycle quantity of the test signal and the correspondence cycle start-phase of the test signal；
Receive feedback signal；
Obtain the cycle quantity of the feedback signal；
According to the cycle quantity of the cycle quantity of the test signal and the feedback signal, filters out and believe with the test
Number be in phase isopen judgement signal；
Obtain the correspondence cycle start-phase of the judgement signal；
According to the correspondence cycle start-phase of the correspondence cycle start-phase of the test signal and the judgement signal, sentence
Disconnected wiring correctness；
Output test result.
It is optionally, described to press during cycle emitting voltage/current test signal, further includes:
Amplify the test signal.
Optionally, the correspondence cycle start-up phase of the cycle quantity for obtaining the test signal and the test signal
Position；
The cycle quantity of the test signal includes: 1,2 or 3, three kinds of situations；
The correspondence cycle start-phase of the test signal is 0 degree.
Optionally, the cycle quantity according to the cycle quantity for testing signal and the feedback signal, filters out
The judgement signal of phase isopen is in the test signal, further includes:
Whether the cycle quantity of the cycle quantity and the feedback signal that judge the test signal is equal；
If equal, the feedback signal is the judgement signal.
Optionally, the correspondence cycle start-phase according to the test signal and the correspondence cycle for judging signal
Start-phase judges wiring correctness, further includes:
Judging the correspondence cycle start-phase of the correspondence cycle start-phase for testing signal and the judgement signal is
It is no consistent；
If consistent, the test signal is consistent with the judgement polarity of signal, and wiring is correct；
If it is inconsistent, the test signal is different from the judgement polarity of signal, wiring error.
Second aspect, present invention also provides a kind of measurement loop wiring error judgment means, which includes:
Transmitting unit, for pressing during cycle emitting voltage/current test signal；
First acquisition unit, for obtaining the cycle quantity of the test signal and the correspondence cycle of the test signal
Beginning phase；
Receiving unit, for receiving feedback signal；
Second acquisition unit, for obtaining the cycle quantity of the feedback signal；
Screening unit, for according to the cycle quantity of the test signal and the cycle quantity of the feedback signal, screening
The judgement signal of phase isopen is in the test signal out；
Third acquiring unit, for obtaining the correspondence cycle start-phase of the judgement signal；
First judging unit, for according to the correspondence cycle start-phase of the test signal and pair of the judgement signal
Cycle start-phase is answered, judges wiring correctness；
Output unit is used for output test result.
Optionally, the transmitting unit, further includes:
Amplifying unit, for amplifying the test signal.
Optionally, the first acquisition unit, for the cycle quantity and the test for obtaining the test signal
The correspondence cycle start-phase of signal；
The cycle quantity of the test signal includes: 1,2 or 3, three kinds of situations；
The correspondence cycle start-phase of the test signal is 0 degree.
Optionally, the screening unit, for according to the cycle quantity of the test signal and the week of the feedback signal
Wave number amount filters out the judgement signal that phase isopen is in the test signal, further includes:
Second judgment unit, for judging that cycle quantity and the cycle quantity of the feedback signal of the test signal is
It is no equal；
If the cycle quantity of the test signal and the cycle quantity of the feedback signal are equal, the feedback signal
For the judgement signal.
Optionally, first judging unit, for according to the test correspondence cycle start-phase of signal and described
The correspondence cycle start-phase for judging signal, judges wiring correctness, further includes:
Third judging unit, for judging the correspondence cycle start-phase of the test signal and pair of the judgement signal
Answer cycle start-phase whether consistent；
If consistent, the test signal is consistent with the judgement polarity of signal, and wiring is correct；
If it is inconsistent, the test signal is different from the judgement polarity of signal, wiring error.
By the above technology it is found that the application provides a kind of measurement loop wiring error judgment method and device, by preset week
Phase emitting voltage/current test signal；The correspondence cycle of the cycle quantity and the test signal that obtain the test signal rises
Beginning phase；Receive feedback signal；Obtain the cycle quantity of the feedback signal；According to the cycle quantity of the test signal and institute
The cycle quantity for stating feedback signal filters out the judgement signal that phase isopen is in the test signal；Obtain the judgement
The correspondence cycle start-phase of signal；According to the correspondence of the correspondence cycle start-phase of the test signal and the judgement signal
Cycle start-phase, judges wiring correctness；Output test result.Method and device provided by the embodiments of the present application can be in nothing
It need to disconnect between secondary circuit and voltage/current mutual inductor in the case where conducting wire, be connect by the transmission of voltage/current signals
Line correction judgement saves and manually disconnects conducting wire step, to improve detection efficiency.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow chart of measurement loop wiring error judgment method provided by the embodiments of the present application；
Fig. 2 is a kind of flow chart of measurement loop wiring error judgment method amplified signal provided by the embodiments of the present application；
Fig. 3 is the process that a kind of measurement loop wiring error judgment method screening provided by the embodiments of the present application judges signal
Figure；
Fig. 4 is the stream that a kind of measurement loop wiring error judgment method provided by the embodiments of the present application judges wiring correctness
Cheng Tu；
Fig. 5 is that feedback signal provided by the embodiments of the present application is the schematic diagram for judging signal；
Fig. 6 is that feedback signal provided by the embodiments of the present application is not the schematic diagram for judging signal；
Fig. 7 is test signal provided by the embodiments of the present application and judges the consistent schematic diagram of signal polarity；
Fig. 8 is test signal provided by the embodiments of the present application and judges the inconsistent schematic diagram of signal polarity；
Fig. 9 is a kind of structural schematic diagram of measurement loop wiring error judgment means provided by the embodiments of the present application；
Figure 10 is the structural schematic diagram of another measurement loop wiring error judgment means provided by the embodiments of the present application.
It illustrates:
Wherein: 1- transmitting unit, 2- first acquisition unit, 3- receiving unit, 4- second acquisition unit, 5- screening unit,
6- third acquiring unit, the first judging unit of 7-, 8- output unit, 9- amplifying unit, 10- second judgment unit, 11- third are sentenced
Disconnected unit.
Specific embodiment
Referring to Fig. 1, a kind of flow chart of measurement loop wiring error judgment method.
The present embodiment provides a kind of measurement loop wiring error judgment methods, this method comprises:
S100, by during cycle emitting voltage/current test signal；
Three-phase voltage/current transformer primary side is high-pressure side, and secondary side is low-pressure side, and voltage/current signals source connects
It is connected to the secondary side outlet terminal of each phase of threephase current transformer, emitting voltage/current signal, the voltage signal magnitude is less than
10V, the current signal amplitude is less than 0.5A, to avoid to secondary device such as: voltmeter, ammeter, power meter, relay are protected
Shield equipment etc. causes any damage.
Voltage/current tests signal and uses sine wave, and sine wave is a kind of unique waveform of single-frequency ingredient, and i.e.
Make to test in signals transmission in voltage/current and generate continually changing magnetic field and electric field, the magnetic field and electric field remain
By sinusoidal rule variation, such test signal is more stable, and the accuracy of testing result can be effectively ensured.
S200 obtains the cycle quantity of the test signal and the correspondence cycle start-phase of the test signal；
S300 receives feedback signal；
S400 obtains the cycle quantity of the feedback signal；
S500, according to it is described test signal cycle quantity and the feedback signal cycle quantity, filter out with it is described
Test signal is in the judgement signal of phase isopen；
S600 obtains the correspondence cycle start-phase of the judgement signal；
S700, according to the correspondence cycle start-up phase of the correspondence cycle start-phase of the test signal and the judgement signal
Position, judges wiring correctness；
S800, output test result.
From the above technical scheme, the application provides a kind of measurement loop wiring error judgment method, by during cycle
Emitting voltage/current test signal；Obtain the cycle quantity of the test signal and the correspondence cycle starting of the test signal
Phase；Receive feedback signal；Obtain the cycle quantity of the feedback signal；According to the test cycle quantity of signal and described
The cycle quantity of feedback signal filters out the judgement signal that phase isopen is in the test signal；Obtain the judgement letter
Number correspondence cycle start-phase；According to the corresponding week of the correspondence cycle start-phase of the test signal and the judgement signal
Wave start-phase, judges wiring correctness；Output test result.Method and device provided by the embodiments of the present application can be not necessarily to
It disconnects between secondary circuit and voltage/current mutual inductor in the case where conducting wire, wiring is carried out by the transmission of voltage/current signals
Correction judgement saves and manually disconnects conducting wire step, to improve detection efficiency.
Referring to fig. 2, a kind of flow chart of measurement loop wiring error judgment method amplified signal.
It is optionally, described to press during cycle emitting voltage/current test signal, further includes:
S101 amplifies the test signal.
Voltage/current signals source is controlled by single-chip microcontroller, and single-chip microcontroller input is logic level, i.e., high level voltage is general
In 2.4V or more, low level voltage is generally in 0.7V hereinafter, in order to make more test signal amplitudes meet logic level
Needs, small signal therein must just be amplified, increase and meet the available signal quantity of logic level, to improve inspection
Survey efficiency.
Optionally, the correspondence cycle start-up phase of the cycle quantity for obtaining the test signal and the test signal
Position；
The cycle quantity of the test signal includes: 1,2 or 3, three kinds of situations；
The correspondence cycle start-phase of the test signal is 0 degree.
The test signal is divided into three-phase according to the cycle quantity: 1 cycle is A phase signals, and 2 cycles are B phase
Signal, 3 cycles are C phase signals.The cycle number of phase line is set as complete cycle wave where the test being distinguished, and can effectively subtract
Exempt from the time wasted when non-complete cycle wave value counts；The cycle start-phase is set to 0 degree, can effectively avoid start-phase
When not being 0 degree, need to calculate cycle start-phase the time it takes, to improve detection efficiency.
Referring to Fig. 3, electric energy metering device Wiring detection method screens the flow chart for judging signal.
Optionally, the cycle quantity according to the cycle quantity for testing signal and the feedback signal, filters out
The judgement signal of phase isopen is in the test signal, further includes:
Whether the cycle quantity of S501, the cycle quantity and the feedback signal that judge the test signal are equal；
S502, if equal, the feedback signal is the judgement signal.
Such as: as shown in figure 5, setting is when the test signal is 1 cycle, it is A phase signals, if the feedback letter
It number is also 1 cycle, wherein the wave of the feedback signal can be the various deformation of the test signal cycle, then the feedback
Signal is to judge signal, can be used for following wiring correctness detection process.As shown in fig. 6, if the feedback signal is not
One cycle, such as 2 or half, then the feedback signal is not to judge signal, it should be excluded, be not useable for following connect
Line correctness detection process.It will be unable to the signal for continuing judgement to exclude, reduce the subsequent cycle for needing to compare initial phase
Quantity, to improve detection efficiency.
Referring to fig. 4, a kind of measurement loop wiring error judgment method judges the flow chart of wiring correctness.
Optionally, the correspondence cycle start-phase according to the test signal and the correspondence cycle for judging signal
Start-phase judges wiring correctness, further includes:
S701 judges the correspondence cycle start-phase of the test signal and the correspondence cycle start-up phase of the judgement signal
Whether position is consistent；
S702, if unanimously, the test signal is consistent with the judgement polarity of signal, and wiring is correct；
S703, if it is inconsistent, the test signal is different from the judgement polarity of signal, wiring error.
Such as: as shown in fig. 7, the start-phase of the setting test signal is 0, if the start-up phase of the judgement signal
Position is also 0, then the two polarity is consistent, and wiring is correct.As shown in figure 8, if the start-phase for judging signal for π, two
Person's polarity is inconsistent, wiring error.By waveform comparison, wiring correctness can be fast and accurately judged.
Referring to Fig. 9, a kind of structural schematic diagram of measurement loop wiring error judgment means.
The present embodiment provides a kind of measurement loop wiring error judgment means, which includes:
Transmitting unit 1, for pressing during cycle emitting voltage/current test signal；
First acquisition unit 2, for obtaining the cycle quantity of the test signal and the correspondence cycle of the test signal
Start-phase；
Receiving unit 3, for receiving feedback signal；
Second acquisition unit 4, for obtaining the cycle quantity of the feedback signal；
Screening unit 5, for according to the cycle quantity of the test signal and the cycle quantity of the feedback signal, screening
The judgement signal of phase isopen is in the test signal out；
Third acquiring unit 6, for obtaining the correspondence cycle start-phase of the judgement signal；
First judging unit 7, for according to the test signal correspondence cycle start-phase and the judgement signal
Corresponding cycle start-phase, judges wiring correctness；
Output unit 8 is used for output test result.
Referring to Figure 10, the structural schematic diagram of another measurement loop wiring error judgment means.
Optionally, the transmitting unit 1, further includes:
Amplifying unit 9, for amplifying the test signal.
Optionally, the first acquisition unit 2, for the cycle quantity and the test for obtaining the test signal
The correspondence cycle start-phase of signal；
The cycle quantity of the test signal includes: 1,2 or 3, three kinds of situations；
The correspondence cycle start-phase of the test signal is 0 degree.
Optionally, the screening unit 5, for according to the cycle quantity of the test signal and the week of the feedback signal
Wave number amount filters out the judgement signal that phase isopen is in the test signal, further includes:
Second judgment unit 10, for judging the cycle quantity of the test signal and the cycle quantity of the feedback signal
It is whether equal；
If equal, the feedback signal is the judgement signal.
Optionally, first judging unit 7, for according to the test correspondence cycle start-phase of signal and described
The correspondence cycle start-phase for judging signal, judges wiring correctness, further includes:
Third judging unit 11, for judge the test signal correspondence cycle start-phase and the judgement signal
Whether corresponding cycle start-phase is consistent；
If consistent, the test signal is consistent with the judgement polarity of signal, and wiring is correct；
If it is inconsistent, the test signal is different from the judgement polarity of signal, wiring error.
From the above technical scheme, this application provides a kind of measurement loop wiring error judgment means, comprising: transmitting
Unit 1, for pressing during cycle emitting voltage/current test signal；First acquisition unit 2, for obtaining the test signal
Cycle quantity and it is described test signal correspondence cycle start-phase；Receiving unit 3, for receiving feedback signal；Second obtains
Unit 4 is taken, for obtaining the cycle quantity of the feedback signal；Screening unit 5, for the cycle according to the test signal
The cycle quantity of amount and the feedback signal filters out the judgement signal that phase isopen is in the test signal；Third obtains
Unit 6 is taken, for obtaining the correspondence cycle start-phase of the judgement signal；First judging unit 7, for according to the test
The correspondence cycle start-phase of the correspondence cycle start-phase of signal and the judgement signal, judges wiring correctness；Output is single
Member 8 is used for output test result.
From above-described embodiment it is found that receiving the test signal emitted by the transmitting unit 1 by the receiving unit 3, and
By comparing the cycle quantity and cycle start-phase for judging signal and the test signal, the wiring of electric energy metering device is judged
Correctness.The device is not necessarily to disconnect the conducting wire between secondary circuit and voltage/current mutual inductor, and testing efficiency is high.
It should be understood that the application is not limited to the exact method and knot for being described above and being shown in the accompanying drawings
Structure, and various modifications and changes may be made without departing from the scope thereof.Scope of the present application only by the attached claims Lai
Limitation.
Claims (8)
1. a kind of measurement loop wiring error judgment method, which is characterized in that the described method includes:
The voltage/current signals source of the secondary side outlet terminal of each phase of threephase current transformer is connected to measurement loop by preset
Periodic emission voltage/current tests signal；
Amplify the test signal；
Obtain the cycle quantity of the test signal and the correspondence cycle start-phase of the test signal；
Receive feedback signal；
Obtain the cycle quantity of the feedback signal；
According to it is described test signal cycle quantity and the feedback signal cycle quantity, filter out at the test signal
In the judgement signal of phase isopen；
Obtain the correspondence cycle start-phase of the judgement signal；
According to the correspondence cycle start-phase of the correspondence cycle start-phase of the test signal and the judgement signal, judgement is connect
Line correctness；
Output test result.
2. a kind of measurement loop wiring error judgment method according to claim 1, which is characterized in that described in the acquisition
Test the cycle quantity of signal and the correspondence cycle start-phase of the test signal；
The cycle quantity of the test signal includes: 1,2 or 3, three kinds of situations；
The correspondence cycle start-phase of the test signal is 0 degree.
3. a kind of measurement loop wiring error judgment method according to claim 1, which is characterized in that described according to
The cycle quantity of signal and the cycle quantity of the feedback signal are tested, filters out and is in phase isopen with the test signal
Judge signal, further includes:
Whether the cycle quantity of the cycle quantity and the feedback signal that judge the test signal is equal；
If equal, the feedback signal is the judgement signal.
4. a kind of measurement loop wiring error judgment method according to claim 1, which is characterized in that described according to
The correspondence cycle start-phase of signal and the correspondence cycle start-phase of the judgement signal are tested, judges wiring correctness, also
Include:
Judge it is described test signal correspondence cycle start-phase and the correspondence cycle start-phase for judging signal whether one
It causes；
If consistent, the test signal is consistent with the judgement polarity of signal, and wiring is correct；
If it is inconsistent, the test signal is different from the judgement polarity of signal, wiring error.
5. a kind of measurement loop wiring error judgment means, which is characterized in that described device includes:
Transmitting unit is connected to the secondary side outlet terminal of each phase of threephase current transformer, for pressing during cycle to measurement loop
Emitting voltage/current test signal；
Amplifying unit, for amplifying the test signal；
First acquisition unit, for obtaining the cycle quantity of the test signal and the correspondence cycle start-up phase of the test signal
Position；
Receiving unit, for receiving feedback signal；
Second acquisition unit, for obtaining the cycle quantity of the feedback signal；
Screening unit, for according to it is described test signal cycle quantity and the feedback signal cycle quantity, filter out with
The test signal is in the judgement signal of phase isopen；
Third acquiring unit, for obtaining the correspondence cycle start-phase of the judgement signal；
First judging unit, for according to the correspondence cycle start-phase of the test signal and the corresponding week of the judgement signal
Wave start-phase, judges wiring correctness；
Output unit is used for output test result.
6. a kind of measurement loop wiring error judgment means according to claim 5, which is characterized in that described first obtains
Unit, the correspondence cycle start-phase for the cycle quantity for obtaining the test signal and the test signal；
The cycle quantity of the test signal includes: 1,2 or 3, three kinds of situations；
The correspondence cycle start-phase of the test signal is 0 degree.
7. a kind of measurement loop wiring error judgment means according to claim 5, which is characterized in that the screening is single
Member, for filtering out and believing with the test according to the cycle quantity of the test signal and the cycle quantity of the feedback signal
Number be in phase isopen judgement signal, further includes:
Second judgment unit, for judge it is described test signal cycle quantity and the feedback signal cycle quantity whether phase
Deng；
If equal, the feedback signal is the judgement signal.
8. a kind of measurement loop wiring error judgment means according to claim 5, which is characterized in that first judgement
Unit, for according to it is described test signal correspondence cycle start-phase and it is described judgement signal correspondence cycle start-phase,
Judge wiring correctness, further includes:
Third judging unit, for judging the correspondence cycle start-phase of the test signal and the corresponding week of the judgement signal
Whether wave start-phase is consistent；
If consistent, the test signal is consistent with the judgement polarity of signal, and wiring is correct；
If it is inconsistent, the test signal is different from the judgement polarity of signal, wiring error.
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| CN201710462582.9A CN107102289B (en) | 2017-06-19 | 2017-06-19 | A kind of measurement loop wiring error judgment method and device |
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| CN107656173A (en) * | 2017-09-22 | 2018-02-02 | 国网天津市电力公司 | A kind of measurement loop line verification method |
| CN108710054A (en) * | 2018-05-25 | 2018-10-26 | 云南电网有限责任公司曲靖供电局 | Wiring state detection device, method and the secondary circuit system of secondary circuit |
| CN109782212A (en) * | 2018-12-29 | 2019-05-21 | 国网山东省电力公司聊城供电公司 | Bilateral separate type metering secondary wiring check device and its core line method |
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