CN110865316A - Ammeter wiring identification detection system and method - Google Patents
Ammeter wiring identification detection system and method Download PDFInfo
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- CN110865316A CN110865316A CN201911191058.8A CN201911191058A CN110865316A CN 110865316 A CN110865316 A CN 110865316A CN 201911191058 A CN201911191058 A CN 201911191058A CN 110865316 A CN110865316 A CN 110865316A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- 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 invention provides an ammeter wiring identification detection system and method, based on a zero-crossing synchronous transmission principle, the wiring of a three-phase ammeter is judged, a main carrier module and a subcarrier module can respectively calculate the alternating current zero-crossing time of the main ammeter side and the three-phase ammeter side, the zero-crossing time difference is calculated according to the zero-crossing time of the alternating current of each phase, and the two zero-crossing time differences are compared, so that whether the three-phase ammeter has a reverse phase sequence wiring problem or not can be judged.
Description
Technical Field
The invention relates to the technical field of ammeter monitoring, in particular to an ammeter wiring identification detection system and method.
Background
In the low-voltage power station district, come to calculate the electric energy through setting up smart electric meter, the ammeter can divide into single-phase ammeter and three-phase ammeter according to the phase line, in the installation of three-phase ammeter, can have the problem that three-phase ammeter line sequence connects wrong (contrary phase sequence), in case the wiring mistake appears in the ammeter, then can harm domestic electric equipment, serious still can harm the life safety of power consumption user, however do not have the convenient detection precaution of intelligence at present to detect the ammeter and whether have the wrong phenomenon of taking place to connect.
Disclosure of Invention
Therefore, the invention provides an ammeter wiring identification detection system and method, which can effectively detect whether a three-phase ammeter has a problem of reverse phase sequence or not, and can quickly find out the problem of wiring error, so that measures can be taken in time, the electric equipment is prevented from being damaged, and the safety of electricity utilization users is ensured.
The technical scheme of the invention is realized as follows:
an electricity meter wiring identification detection system comprising:
the main ammeter is arranged at a transformer of the low-voltage power utilization area and used for monitoring the three-phase alternating current output by the transformer;
the main carrier module is arranged on the outgoing line side of the main ammeter and used for collecting three-phase alternating current data of the main ammeter;
the subcarrier module is arranged on the incoming line side of the three-phase electric meter and used for collecting three-phase alternating current data input to the three-phase electric meter;
the metering automation system is used for displaying the line abnormal condition of the three-phase electric meter;
the main carrier module is in communication connection with the subcarrier module, and the metering automation system is in data connection with the main carrier module; the main carrier module comprises a zero-crossing communication module and a first zero-crossing time calculation module, the subcarrier module comprises a command execution module, a second zero-crossing time calculation module, a first time difference calculation module, a second time difference calculation module and a judgment module, the zero-crossing communication module is in data connection with the first zero-crossing time calculation module and the command execution module respectively, the first zero-crossing time calculation module is in data connection with the first time difference calculation module, the second zero-crossing time calculation module is in data connection with the command execution module and the second time difference calculation module respectively, and the judgment module is in data connection with the first time difference calculation module and the second time difference calculation module respectively.
Preferably, the main carrier module further includes a judgment result transmission module, and the judgment result transmission module is respectively in data connection with the metering automation system and the judgment module.
Preferably, the metering automation system comprises a judgment result display module, and the judgment result display module is in data connection with the judgment result conveying module.
Preferably, the main carrier module further comprises a wireless transmitting module, the metering automation system comprises a wireless receiving module, and the wireless transmitting module is in data connection with the wireless receiving module.
An ammeter wiring identification detection method comprises the following steps:
step S1, when the three-phase electricity of the main electricity meter passes through zero, the zero-crossing communication module sends an execution command to the command execution module, and meanwhile, the first zero-crossing time calculation module calculates the alternating current zero-crossing time of the main electricity meter;
step S2, the first zero-crossing time calculation module sends the main ammeter alternating current zero-crossing time to the first time difference calculation module, the command execution module controls the second zero-crossing time calculation module to calculate the three-phase ammeter alternating current zero-crossing time, and the three-phase ammeter alternating current zero-crossing time is sent to the second time difference calculation module;
step S3, the first time difference calculation module and the second time difference calculation module calculate the zero-crossing time difference of the adjacent lines and send the zero-crossing time difference to the judgment module;
step S4, the judging module judges whether the zero-crossing time difference sent by the first time difference calculating module and the second time difference calculating module is different, and sends the judging result to the main carrier module;
and step S5, the main carrier module sends the judgment result to the metering automation system for display.
Preferably, the specific step of step S1 is: when each phase of electricity of the three-phase electricity of the main electricity meter sequentially passes through zero, the zero-crossing communication module sequentially sends an execution command to the command execution module, and meanwhile, the first zero-crossing time calculation module sequentially calculates the alternating-current zero-crossing time of the main electricity meter corresponding to each phase of electricity when each phase of electricity passes through zero.
Preferably, the execution command sent by the zero-crossing communication module in step S1 includes phase line information, and the step S2 commands the execution module to control the second zero-crossing time calculation module to calculate the zero-crossing time of the alternating current of the three-phase electric meter specifically includes: and the command execution module controls the second zero-crossing time calculation module to calculate the zero-crossing time of the alternating current of the three-phase electric meter with the same phase line.
Preferably, the specific step of step S4 is: and when the judgment module judges that the zero-crossing time difference sent by the first time difference calculation module and the second time difference calculation module is different, the judgment result is that the three-phase ammeter is connected in a reverse phase sequence, and when the difference does not exist, the judgment result is that the three-phase ammeter is normally connected.
Preferably, the specific step of step S5 is: and the main carrier module sends the judgment result to the metering automation system in a wireless mode, and the metering automation system displays the judgment result.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an ammeter wiring identification detection system and method, based on the zero-crossing synchronous transmission principle, judging the wiring of a three-phase ammeter, arranging carrier modules at a main ammeter and the three-phase ammeter, when the voltage of the three-phase electricity at the main ammeter side is zero, calculating the zero-crossing time of the phase electricity by the carrier modules, simultaneously carrying out carrier communication with the sub-carrier modules, simultaneously calculating the zero-crossing time of the alternating current of a corresponding phase line by the sub-carrier modules, obtaining the zero-crossing time difference of each phase electricity at the main ammeter side and the zero-crossing time difference of each phase electricity at the three-phase ammeter side after calculating the zero-crossing time of each phase electricity, comparing the two, if the time difference of the two is different, showing that the three-phase ammeter has the problem of reverse phase sequence wiring, and displaying the judgment result by a metering automation module, so that a worker can timely know the wiring condition of the current three-phase ammeter, if the reverse phase sequence wiring occurs, the processing can be carried out in time, the damage of subsequent electric equipment is prevented, and the safety of electric users is protected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of an ammeter wiring identification detection system of the present invention;
fig. 2 is a waveform diagram of transmission of three-phase alternating current.
In the figure, 1 is a master meter, 2 is a master carrier module, 3 is a subcarrier module, 4 is a metering automation system, 5 is a zero-crossing communication module, 6 is a first zero-crossing time calculation module, 7 is a command execution module, 8 is a second zero-crossing time calculation module, 9 is a first time difference calculation module, 10 is a second time difference calculation module, 11 is a judgment module, 12 is a judgment result transmission module, 13 is a judgment result display module, 14 is a wireless transmission module, and 15 is a wireless reception module.
Detailed Description
For a better understanding of the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1-2, the invention relates to an electric meter wiring identification detection system, comprising:
the main ammeter 1 is arranged at a transformer of the low-voltage power utilization area and used for monitoring three-phase alternating current output by the transformer;
the main carrier module 2 is arranged on the outgoing line side of the main electric meter 1 and used for collecting three-phase alternating current data of the main electric meter 1;
the subcarrier module 3 is arranged on the incoming line side of the three-phase electric meter and used for collecting three-phase alternating current data input to the three-phase electric meter;
the metering automation system 4 is used for displaying the line abnormal condition of the three-phase electric meter;
the main carrier module 2 is in communication connection with the subcarrier module 3, and the metering automation system 4 is in data connection with the main carrier module 2; the main carrier module 2 includes a zero-crossing communication module 5 and a first zero-crossing time calculation module 6, the subcarrier module 3 includes a command execution module 7, a second zero-crossing time calculation module 8, a first time difference calculation module 9, a second time difference calculation module 10 and a judgment module 11, the zero-crossing communication module 5 is respectively in data connection with the first zero-crossing time calculation module 6 and the command execution module 7, the first zero-crossing time calculation module 6 is in data connection with the first time difference calculation module 9, the second zero-crossing time calculation module 8 is respectively in data connection with the command execution module 7 and the second time difference calculation module 10, and the judgment module 11 is respectively in data connection with the first time difference calculation module 9 and the second time difference calculation module 10.
The invention relates to an ammeter wiring identification detection system, which is used for wiring identification detection of a three-phase ammeter, based on a zero-crossing synchronous transmission principle, when alternating current on the side of a main ammeter 1 passes through zero, a main carrier module 2 and a sub carrier module 3 carry out carrier communication, the zero-crossing time of the alternating current is transmitted to the sub carrier module 3, meanwhile, the sub carrier module 3 collects the zero-crossing time of the alternating current of the same phase, after the operation is carried out on each alternating current, the time difference of the zero-crossing of the alternating current of the adjacent phase can be obtained, the zero-crossing time difference of the alternating current of the main carrier module 2 and the sub carrier module 3 is compared, so as to judge whether the three-phase ammeter has a reverse phase sequence wiring problem, when the reverse phase sequence wiring exists, a measurement automation system 4 can display a judgment result, so that a worker can timely process the wiring of the three-, the safety of the user using electricity is protected.
The main carrier module 2 is provided with a zero-crossing communication module 5, when any phase of three-phase electricity crosses zero, the zero-crossing communication module 5 sends an execution command to a command execution module 7 of the subcarrier module 3, meanwhile, a first zero-crossing time calculation module 6 calculates the zero-crossing time of the alternating current of the phase line, the command execution module 7 controls a second zero-crossing time calculation module 8 to calculate the zero-crossing time of the alternating current of the same phase line, after a first time difference calculation module 9 and a second time difference calculation module 10 calculate the zero-crossing time difference of the alternating current of two adjacent phase lines, a judgment module 11 judges the zero-crossing time difference, if the two zero-crossing time differences are the same, the wiring of the three-phase electricity meter is normal, and if the two zero-crossing time differences are different, the wiring of the three-phase electricity meter has the problem of reverse phase sequence wiring.
Preferably, the main carrier module 2 further includes a determination result transmission module 12, and the determination result transmission module 12 is respectively in data connection with the metering automation system 4 and the determination module 11.
The judgment module 11 sends the judgment result to the judgment result transmission module 12, and the judgment result transmission module 12 sends the judgment result to the metering automation system 4.
Preferably, the metering automation system 4 includes a judgment result display module 13, and the judgment result display module 13 is in data connection with the judgment result conveying module 12.
The metering automation system 4 can be used for meter reading and is also arranged on the judgment result display module 13, the judgment result transmission module 12 transmits the judgment result to the judgment result display module 13, and the judgment result display module 13 displays the judgment result.
Preferably, the main carrier module 2 further includes a wireless transmitting module 14, the metering automation system 4 includes a wireless receiving module 15, and the wireless transmitting module 14 is in data connection with the wireless receiving module 15.
Specifically, the main carrier module 2 and the metering automation system 4 are in a wireless communication mode, and wireless transmission of data can be realized through the wireless transmitting module 14 and the wireless receiving module 15.
The invention discloses an ammeter wiring identification detection method, which comprises the following steps:
step S1, when the three-phase electricity of the main ammeter 1 passes through zero, the zero-crossing communication module 5 sends an execution command to the command execution module 7, and meanwhile, the first zero-crossing time calculation module 6 calculates the alternating-current zero-crossing time of the main ammeter 1;
step S2, the first zero-crossing time calculation module 6 sends the main electricity meter 1 alternating current zero-crossing time to the first time difference calculation module 9, the command execution module 7 controls the second zero-crossing time calculation module 8 to calculate the three-phase electricity meter alternating current zero-crossing time, and sends the three-phase electricity meter alternating current zero-crossing time to the second time difference calculation module 10;
step S3, the first time difference calculation module 9 and the second time difference calculation module 10 calculate the zero-crossing time difference of the adjacent lines, and send the zero-crossing time difference to the judgment module 11;
step S4, the determining module 11 determines whether there is a difference between the zero-crossing time differences sent by the first time difference calculating module 9 and the second time difference calculating module 10, and sends the determination result to the main carrier module 2;
in step S5, the main carrier module 2 sends the determination result to the metering automation system 4 for display.
The invention uses the phase difference of each phase voltage of the three-phase alternating current to synchronously process by taking the zero-crossing time point of each phase alternating current as the reference, the main carrier module 2 is in carrier communication with the sub-carrier module 3 when the alternating current crosses zero, the main carrier module 2 and the sub-carrier module 3 respectively record the zero-crossing time of the same phase line when the phase line crosses zero, after the zero-crossing time of each phase alternating current is calculated, can obtain the zero-crossing time difference of adjacent phase lines, judge the zero-crossing time difference between the same phase lines, so that it can be judged that the connection result of the three-phase electric meter, for example, the zero-crossing time difference between the a-phase and the B-phase of the main carrier module 2 is the same as the zero-crossing time difference between the a-phase and the B-phase of the sub-carrier module 3, the method can indicate that the wiring of the three-phase electric meter is normal, and if the zero-crossing time difference is different, the problem of wiring in a reverse phase sequence is indicated, and the wiring sequence of the three-phase electric meter needs to be changed.
Preferably, the specific step of step S1 is: when each phase of three-phase electricity of the main electricity meter 1 sequentially passes through zero, the zero-crossing communication module 5 sequentially sends an execution command to the command execution module 7, and meanwhile, the first zero-crossing time calculation module 6 sequentially calculates the alternating-current zero-crossing time of the main electricity meter 1 corresponding to each phase of electricity when passing through zero.
The ABC three-phase electricity exists in the alternating current, only one phase of electricity crosses zero at the same time, the zero crossing time of the alternating current of different phases can be calculated by utilizing the principle, so that the zero crossing time difference of the two-phase alternating current can be calculated, and whether the three-phase electricity meter has the wiring problem can be judged by comparing the alternating current zero crossing time difference at the main carrier module 2 with the alternating current zero crossing time difference at the sub-carrier module 3.
Preferably, the execution command sent by the zero-cross communication module 5 in step S1 includes phase line information, and the step S2 instructs the execution module 7 to control the second zero-cross time calculation module 8 to calculate the zero-cross time of the alternating current of the three-phase electric meter specifically includes the following steps: and the command execution module 7 controls the second zero-crossing time calculation module 8 to calculate the zero-crossing time of the alternating current of the three-phase electric meter with the same phase line.
The main carrier module 2 and the subcarrier module 3 must perform calculation at the same time for the same phase line at the alternating current zero-crossing time, for example, when the alternating current a of the main carrier module 2 crosses zero, the phase line information of the execution command sent by the zero-crossing communication module 5 is phase a, and the command execution module 7 controls the second zero-crossing time calculation module 8 to calculate the zero-crossing time of the alternating current a at the three-phase electric meter, so that the finally calculated zero-crossing time difference is the same time difference between two phases, and the accuracy of the final wiring judgment is ensured.
Preferably, the specific step of step S4 is: when the judgment module 11 judges that the zero-crossing time differences sent by the first time difference calculation module 9 and the second time difference calculation module 10 are different, the judgment result is that the three-phase electric meter is connected in a reverse phase sequence, and when the difference does not exist, the judgment result is that the three-phase electric meter is normally connected.
When the zero-crossing time difference is different, the fact that the three-phase electric meter has the problem of reverse phase sequence wiring is indicated, the electric wire of the three-phase electric meter needs to be detached for rewiring, and if the difference does not exist, the fact that the three-phase electric meter is normal in wiring is indicated.
Preferably, the specific step of step S5 is: and the main carrier module 2 sends the judgment result to the metering automation system 4 in a wireless mode, and the metering automation system 4 displays the judgment result.
The final judgment result is sent to the metering automation system 4, so that the staff can check the wiring condition through the metering automation system 4.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An electricity meter wiring identification detection system, comprising:
the main ammeter is arranged at a transformer of the low-voltage power utilization area and used for monitoring the three-phase alternating current output by the transformer;
the main carrier module is arranged on the outgoing line side of the main ammeter and used for collecting three-phase alternating current data of the main ammeter;
the subcarrier module is arranged on the incoming line side of the three-phase electric meter and used for collecting three-phase alternating current data input to the three-phase electric meter;
the metering automation system is used for displaying the line abnormal condition of the three-phase electric meter;
the main carrier module is in communication connection with the subcarrier module, and the metering automation system is in data connection with the main carrier module; the main carrier module comprises a zero-crossing communication module and a first zero-crossing time calculation module, the subcarrier module comprises a command execution module, a second zero-crossing time calculation module, a first time difference calculation module, a second time difference calculation module and a judgment module, the zero-crossing communication module is in data connection with the first zero-crossing time calculation module and the command execution module respectively, the first zero-crossing time calculation module is in data connection with the first time difference calculation module, the second zero-crossing time calculation module is in data connection with the command execution module and the second time difference calculation module respectively, and the judgment module is in data connection with the first time difference calculation module and the second time difference calculation module respectively.
2. The system of claim 1, wherein the main carrier module further comprises a determination result transmission module, and the determination result transmission module is respectively in data connection with the metering automation system and the determination module.
3. The system of claim 2, wherein the metering automation system comprises a judgment result display module, and the judgment result display module is in data connection with the judgment result transmission module.
4. The system of claim 3, wherein the host carrier module further comprises a wireless transmitter module, and the metering automation system comprises a wireless receiver module, and the wireless transmitter module is in data connection with the wireless receiver module.
5. An electric meter wiring identification detection method using the electric meter wiring identification detection system according to any one of claims 1 to 4, comprising the steps of:
step S1, when the three-phase electricity of the main electricity meter passes through zero, the zero-crossing communication module sends an execution command to the command execution module, and meanwhile, the first zero-crossing time calculation module calculates the alternating current zero-crossing time of the main electricity meter;
step S2, the first zero-crossing time calculation module sends the main ammeter alternating current zero-crossing time to the first time difference calculation module, the command execution module controls the second zero-crossing time calculation module to calculate the three-phase ammeter alternating current zero-crossing time, and the three-phase ammeter alternating current zero-crossing time is sent to the second time difference calculation module;
step S3, the first time difference calculation module and the second time difference calculation module calculate the zero-crossing time difference of the adjacent lines and send the zero-crossing time difference to the judgment module;
step S4, the judging module judges whether the zero-crossing time difference sent by the first time difference calculating module and the second time difference calculating module is different, and sends the judging result to the main carrier module;
and step S5, the main carrier module sends the judgment result to the metering automation system for display.
6. The electric meter wiring identification detection method according to claim 5, wherein the specific steps of the step S1 are as follows: when each phase of electricity of the three-phase electricity of the main electricity meter sequentially passes through zero, the zero-crossing communication module sequentially sends an execution command to the command execution module, and meanwhile, the first zero-crossing time calculation module sequentially calculates the alternating-current zero-crossing time of the main electricity meter corresponding to each phase of electricity when each phase of electricity passes through zero.
7. The method as claimed in claim 6, wherein the execution command sent by the zero-crossing communication module in the step S1 includes phase line information, and the step S2 commands the execution module to control the second zero-crossing time calculation module to calculate the zero-crossing time of the alternating current of the three-phase electric meter includes the specific steps of: and the command execution module controls the second zero-crossing time calculation module to calculate the zero-crossing time of the alternating current of the three-phase electric meter with the same phase line.
8. The electric meter wiring identification detection method according to claim 5, wherein the specific steps of the step S4 are as follows: and when the judgment module judges that the zero-crossing time difference sent by the first time difference calculation module and the second time difference calculation module is different, the judgment result is that the three-phase ammeter is connected in a reverse phase sequence, and when the difference does not exist, the judgment result is that the three-phase ammeter is normally connected.
9. The electric meter wiring identification detection method according to claim 5, wherein the specific steps of the step S5 are as follows: and the main carrier module sends the judgment result to the metering automation system in a wireless mode, and the metering automation system displays the judgment result.
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Application publication date: 20200306 |