CN210894669U - Metering error wiring simulation training device - Google Patents
Metering error wiring simulation training device Download PDFInfo
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- CN210894669U CN210894669U CN201921725851.7U CN201921725851U CN210894669U CN 210894669 U CN210894669 U CN 210894669U CN 201921725851 U CN201921725851 U CN 201921725851U CN 210894669 U CN210894669 U CN 210894669U
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Abstract
The utility model relates to a metering error wiring simulation training device, which comprises a display, a MCU, a FPGA module, an A/D conversion module, a sampling circuit, a three-phase four-wire electric energy meter, a three-phase three-wire electric energy meter and a three-phase power source; the MCU is connected with the FPGA module, the FPGA module is connected with the A/D conversion module, and the A/D conversion module is connected with eight sampling circuits in parallel; the three-phase four-wire electric energy meter is provided with an ABC three-phase current outlet wire, an ABC three-phase current return wire, an ABC three-phase voltage wire and a zero wire, and the three-phase three-wire electric energy meter is provided with an AC phase current outlet wire, an AC phase current return wire and an ABC voltage wire; the three-phase three-wire electric energy meter is connected with the three-phase four-wire electric energy collineation, ten lines of the three-phase four-wire electric energy are connected through the electric switch the three-phase power source, the scheme can be switched between the three-phase three-wire electric energy meter and the three-phase four-wire electric energy meter, and therefore the three-phase three-wire electric energy meter and the three-phase four-wire electric energy meter can be used for testing.
Description
Technical Field
The utility model relates to a wrong wiring emulation field, concretely relates to measurement error wiring emulation training device.
Background
The wiring modes of the electric energy meter are various and are determined by various conditions such as a circuit to be tested (a single phase, a three-phase three-wire, a three-phase three-four-wire and the like), a measurement object, a current transformer, a voltage transformer and the like, and the wiring correctness must be ensured no matter which wiring mode is selected; if the wiring is incorrect, even if the accuracy of the electric energy meter and the mutual inductor is high, the purpose of accurate metering can not be achieved, and even metering can not be achieved. The panel function singleness of current measurement mistake wiring emulation training set sets up various wrong wiring modes through the communication of host computer PC end with the training set hardware, installs conventional three-phase three-wire electric energy meter on the panel, or three-phase four-wire electric energy meter, and the external connection is many, and can not change the electric energy meter type according to the user's needs at will. The detection tool is not matched, a user is required to independently prepare the measurement tool by himself to carry out wrong wiring measurement and fault judgment, and due to the fact that the user uses experience problems, the detection efficiency is low, even the detection tool is burnt out and casualties are caused due to the fact that the detection tool is selected for use or the function selection is wrong.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a measurement error wiring emulation training set, can switch between three-phase three-wire electric energy meter and three-phase four-wire electric energy meter to make its test with different grade type electric energy meter.
The purpose of the utility model is realized through the following technical scheme:
a simulation training device for metering error wiring comprises a display, an MCU (microprogrammed control Unit), an FPGA (field programmable gate array) module, an A/D (analog/digital) conversion module, a sampling circuit, a three-phase four-wire electric energy meter, a three-phase three-wire electric energy meter and a three-phase power source;
the display is connected with the MCU and used for displaying a simulation test result;
the MCU is connected with the FPGA module, the FPGA module is connected with the A/D conversion module, and the A/D conversion module is connected with eight sampling circuits in parallel;
the three-phase four-wire electric energy meter is provided with an ABC three-phase current outlet wire, an ABC three-phase current return wire, an ABC three-phase voltage wire and a zero wire, and the three-phase three-wire electric energy meter is provided with an AC phase current outlet wire, an AC phase current return wire and an ABC voltage wire;
the three-phase three-wire electric energy meter is connected with the three-phase four-wire electric energy in a collinear way, and ten lines of the three-phase four-wire electric energy are connected with the three-phase power source through the electric switch;
the testing interface of the sampling circuit is respectively arranged on a testing circuit, and the testing circuit comprises an ABC three-phase current outgoing line, an ABC three-phase current return line and an AC phase current outgoing line and an AC voltage line of the three-phase three-wire electric energy meter.
With the circuit collinear connection of the circuit of three-phase three-wire electric energy meter and the circuit of three-phase four-wire electric energy meter in this scheme, when needs are tested three-phase four-wire electric energy meter, then closed all electrical switch, when needs are tested three-phase three-wire electric energy meter, then only need to be to the three-phase three-wire electric energy meter circuit correspond electrical switch closed can to this electric energy meter wiring test that is applicable to the different grade type, the cost is reduced, the flexibility of equipment has been improved.
Further, ten of the electrical switches are controlled by two ULNs 2803, and two of the ULNs 2803 are connected to an FPGA module.
Second purpose, in order to solve and not set up supporting detection instrument among the prior art, need the user to prepare measuring tool alone by oneself, carry out wrong wiring measurement and failure diagnosis, because user's use experience problem also easily because the detection instrument chooses for use or the function selects the mistake, cause detection efficiency low, even burn out the detection instrument and cause the problem of casualties condition, a protection cutting unit has still been introduced to this scheme.
Further, the test circuit also comprises a protection cut-off unit, wherein the protection cut-off unit comprises a relay switch connected between the sampling circuit and the test circuit in series, and the relay switch is connected with the FPGA module through a ULN 2803.
Further, the MCU adopts C8051F 340.
Furthermore, the display and the MCU form an upper computer, and the upper computer is communicated with the FPGA through a serial port/a network port.
The utility model has the advantages that: with conventional three-phase three-wire electric energy meter and three-phase four-wire electric energy meter, change for virtual three-phase three-wire electric energy meter, three-phase four-wire electric energy meter, the user can switch the electric energy meter type at host computer PC end at will according to actual training needs, and the panel does not have unnecessary connecting wire, only remains the measuring point for the detection, improves detection efficiency and security.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a diagram of switching wiring of the electric energy meter of the present invention;
fig. 3 is a circuit diagram of the relay control of the present invention.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in figure 1, the simulation training device for metering error wiring comprises a display, an MCU, an FPGA module, an A/D conversion module, a sampling circuit, a three-phase four-wire electric energy meter, a three-phase three-wire electric energy meter and a three-phase power source.
The display is connected with the MCU and used for displaying simulation test results, specifically comprising data display of phase, amplitude, frequency and the like, the display and the MCU form an upper computer together, namely the display and the MCU can be designed by adopting a computer essentially, or can also adopt a form of an independent control chip plus the display, and when the latter is selected, the control chip adopts C8051F 340. The upper computer is used for finishing the simulation test of the training device by selecting a three-phase four-wire electric energy meter or a three-phase three-wire electric energy meter.
As shown in fig. 2, the MCU (PC or upper computer) is connected to the FPGA module, the FPGA module is connected to the a/D conversion module, and the a/D conversion module is connected in parallel with eight sampling circuits.
The three-phase four-wire electric energy meter is provided with an ABC three-phase current outlet wire, an ABC three-phase current return wire, an ABC three-phase voltage wire and a zero wire, namely ten lines IN total, namely IA, IB, IC, IA ', IB ', IC ', UA, UB, UC and IN (UN) IN the graph 2. The three-phase three-wire electric energy meter is provided with an AC phase current outlet wire, an AC phase current return wire and ABC voltage wires, namely seven wires on the right side of the meter in FIG. 2, namely IA, IC, IA ', IC', UA, UB and UC.
The three-phase three-wire electric energy meter is connected with the three-phase four-wire electric energy in a collinear way, namely IA, IC, IA ', IC', UA, UB and UC of the three-phase four-wire electric energy meter and IA, IC, IA ', IC', UA, UB and UC of the three-phase three-wire electric energy meter are connected in parallel in a collinear way.
Ten lines of three-phase four-line electric energy are connected with a three-phase power source through electric switches, ten electric switches are sequentially numbered from left to right as K1-K10 and controlled by two ULNs 2803, the two ULNs 2803 are connected with an FPGA module, the ULNs 2803 adopt an AP = DIP18 and AFW = SOL18 packaging mode, and the eight-circuit NPN Darlington connection transistor array series are particularly suitable for the scheme.
The testing interfaces of the eight sampling circuits are respectively arranged on testing circuits, and the testing circuits comprise ABC three-phase current outgoing lines, ABC three-phase current return lines of the three-phase four-wire electric energy meter, AC phase current outgoing lines and AC voltage lines of the three-phase three-wire electric energy meter, namely IA, IB, IC, UA, UB and UC circuits distributed on the three-phase four-wire electric energy meter and IA, IC, UA and UC circuits of the three-phase three-wire electric energy meter.
When simulation test is carried out, the upper computer adjusts the type of the electric energy meter, when the type of the electric energy meter is a three-phase four-wire electric energy meter, the switches K1-K10 are closed, and when the type of the electric energy meter is a three-phase three-wire electric energy meter, the switches K1, K2, K3, K5, K7, K8 and K9 are closed.
As shown in fig. 3, the test circuit further includes a protection cutoff unit, the protection cutoff unit includes relay switches connected in series between the sampling circuit and the test circuit, the relay switches are connected with the FPGA module through a ULN2803, when the test circuit is overloaded or short-circuited, the test circuit is disconnected through the relay switches, so that the circuit is prevented from being burnt, the number of the relay switches is 8, the relay switches are respectively connected in series on one sampling circuit, and the number of the relay switches is KA1-KA 8.
The foregoing is merely a preferred embodiment of the invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the invention as expressed in the above teachings or as known to the person skilled in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (5)
1. A simulation training device for metering error wiring is characterized by comprising a display, an MCU (microprogrammed control unit), an FPGA (field programmable gate array) module, an A/D (analog/digital) conversion module, a sampling circuit, a three-phase four-wire electric energy meter, a three-phase three-wire electric energy meter and a three-phase power source;
the display is connected with the MCU and used for displaying a simulation test result;
the MCU is connected with the FPGA module, the FPGA module is connected with the A/D conversion module, and the A/D conversion module is connected with eight sampling circuits in parallel;
the three-phase four-wire electric energy meter is provided with an ABC three-phase current outlet wire, an ABC three-phase current return wire, an ABC three-phase voltage wire and a zero wire, and the three-phase three-wire electric energy meter is provided with an AC phase current outlet wire, an AC phase current return wire and an ABC voltage wire;
the three-phase three-wire electric energy meter is connected with the three-phase four-wire electric energy in a collinear way, and ten lines of the three-phase four-wire electric energy are connected with the three-phase power source through the electric switch;
the testing interface of the sampling circuit is respectively arranged on a testing circuit, and the testing circuit comprises an ABC three-phase current outgoing line, an ABC three-phase current return line and an AC phase current outgoing line and an AC voltage line of the three-phase three-wire electric energy meter.
2. The metering error wiring simulation training device as claimed in claim 1, wherein ten of the electrical switches are controlled by two ULNs 2803, the two ULNs 2803 being connected to an FPGA module.
3. The metering error wiring simulation training device as claimed in claim 1, further comprising a protection cutoff unit, wherein the protection cutoff unit comprises a relay switch connected in series between a sampling circuit and a test line, and the relay switch is connected with the FPGA module through a ULN 2803.
4. The metering error wiring simulation training device as claimed in claim 1, wherein the MCU employs C8051F 340.
5. The metering error wiring simulation training device as claimed in claim 4, wherein the display and the MCU form an upper computer, and the upper computer communicates with the FPGA through a serial port/a network port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921725851.7U CN210894669U (en) | 2019-10-15 | 2019-10-15 | Metering error wiring simulation training device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921725851.7U CN210894669U (en) | 2019-10-15 | 2019-10-15 | Metering error wiring simulation training device |
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| CN210894669U true CN210894669U (en) | 2020-06-30 |
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| CN201921725851.7U Active CN210894669U (en) | 2019-10-15 | 2019-10-15 | Metering error wiring simulation training device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630720A (en) * | 2020-12-03 | 2021-04-09 | 朗兴共创电气有限公司 | Three-phase electric energy meter wiring simulation system and use method thereof |
| CN115132040A (en) * | 2022-06-27 | 2022-09-30 | 广东电网有限责任公司 | Electric energy measurement secondary circuit wiring training device |
-
2019
- 2019-10-15 CN CN201921725851.7U patent/CN210894669U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630720A (en) * | 2020-12-03 | 2021-04-09 | 朗兴共创电气有限公司 | Three-phase electric energy meter wiring simulation system and use method thereof |
| CN115132040A (en) * | 2022-06-27 | 2022-09-30 | 广东电网有限责任公司 | Electric energy measurement secondary circuit wiring training device |
| CN115132040B (en) * | 2022-06-27 | 2023-06-16 | 广东电网有限责任公司 | Electric energy measurement secondary circuit wiring training set |
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