CN106501761B - Three-phase intelligent ammeter simulation detection system - Google Patents
Three-phase intelligent ammeter simulation detection system Download PDFInfo
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- CN106501761B CN106501761B CN201611216293.2A CN201611216293A CN106501761B CN 106501761 B CN106501761 B CN 106501761B CN 201611216293 A CN201611216293 A CN 201611216293A CN 106501761 B CN106501761 B CN 106501761B
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- electric energy
- energy meter
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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
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- General Physics & Mathematics (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a three-phase intelligent ammeter simulation detection system, which comprises a power source, an ammeter and a concentrator connected with the ammeter, wherein the power source is a power source; the power source supplies power to the concentrator and the electric energy meter in a current mode through the switching unit, a current transformer and a change-over switch used for switching the switching unit between a direct power supply mode and an indirect power supply mode are arranged in the switching unit, the direct power supply mode refers to that current output by the power source is directly supplied to the concentrator, and the indirect mode refers to that current output by the power source is supplied to the concentrator after being converted through the current transformer. The invention uses a set of power source to supply power for the concentrator and the electric energy meter in a unified way, and meets the use requirements of the electric energy meters with different current specifications.
Description
Technical Field
The invention relates to an electric energy meter simulation detection system.
Background
The intelligent electric energy meter is an important metering device for electric energy trade settlement between a power generation company and a power supply company as well as between the power supply company and a power consumer. In order to verify error verification and reading data of the three-phase intelligent electric energy meter, an analog detection system is required to be built, and the three-phase intelligent electric energy meter is read through a concentrator to complete relevant performance detection.
In the simulation detection system of the three-phase intelligent electric energy meter in the prior art, because the current required by the working of the concentrator and the electric energy meter is different, two sets of power sources are required to be used for supplying power to the concentrator and the electric energy meter respectively, the wiring relationship is complex, and the cost is high. On the other hand, the current specification of the electric energy meter to be detected is different, and the concentrator and the electric energy meter are difficult to be simultaneously powered by the same power source.
Disclosure of Invention
The invention provides a three-phase intelligent ammeter simulation detection system, which aims to solve the problems that: (1) A set of power source is used for supplying power for the concentrator and the electric energy meter together; (2) The operation requirements of the electric energy meter with different power supply current specifications are met.
The technical scheme of the invention is as follows:
the three-phase intelligent ammeter simulation detection system comprises a power source, an ammeter and a concentrator connected with the ammeter;
the power source supplies power to the concentrator and the electric energy meter in a current mode through the switching unit, a current transformer and a change-over switch used for switching the switching unit between a direct power supply mode and an indirect power supply mode are arranged in the switching unit, the direct power supply mode refers to that current output by the power source is directly supplied to the concentrator, and the indirect mode refers to that current output by the power source is supplied to the concentrator after being converted through the current transformer.
As a further improvement of the invention: the switching unit is provided with a current inlet end and a current outlet end which are used for being connected with a power source, and also comprises a first output end and a second output end which are used for supplying power to the electric energy meter, and a third output end and a fourth output end which are used for supplying power to the concentrator;
the primary side of the current transformer is provided with a first wiring terminal and a second wiring terminal, and the secondary side of the current transformer is provided with a third wiring terminal and a fourth wiring terminal;
the switch comprises a first switch and a second switch, wherein the public end of the first switch is connected with the current outlet end, the normally closed end is connected with the first wiring end, the normally open end is connected with the third wiring end, the public end of the second switch is connected with the third output end, the normally closed end is connected with the fourth wiring end, and the normally open end is connected with the second wiring end;
the third wiring terminal is connected with the fourth output end, the current inlet end is connected with the first output end, and the second wiring terminal is connected with the second output end.
As a further improvement of the invention: the control device is connected with the first change-over switch and the second change-over switch respectively to control the first change-over switch and the second change-over switch to synchronously act.
As a further improvement of the invention: the concentrator is connected with the control device.
As a further improvement of the invention: the power source is connected with the control device.
As a further improvement of the invention: the concentrator is connected with the electric energy meter through the collector.
Compared with the prior art, the invention has the following positive effects: the invention converts the current provided by the power source through the switching unit, and provides two direct and indirect power supply modes: in a direct power supply mode, the power source directly supplies small current for the concentrator and the electric energy meter under the control of the control device; in the indirect power supply mode, the power source directly supplies large current to the electric energy meter, and meanwhile, the current is converted into small current through the current transformer to supply power to the concentrator, so that the normal power supply when the concentrator needs the small current and the electric energy meter needs the large current is ensured. The invention can use a set of power source to supply power for the electric energy meter and the concentrator together, and meets the use requirements of the electric energy meter with different current specifications.
Drawings
Fig. 1 is a schematic diagram of a switching unit.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings:
the three-phase intelligent ammeter simulation detection system comprises a power source, a control device, an ammeter and a concentrator connected with the ammeter. The concentrator is connected with the electric energy meter through the collector, the concentrator is connected with the collector in a carrier mode in a communication mode, the collector is connected with the electric energy meter in an RS485 mode in a communication mode, and the electric energy meter is a three-phase intelligent electric energy meter.
The concentrator and the power source are also respectively connected with a control device, and the control device comprises an industrial personal computer and an upper computer.
The power source supplies power to the concentrator and the electric energy meter in a current mode through the switching unit, a current transformer and a change-over switch used for switching the switching unit between a direct power supply mode and an indirect power supply mode are arranged in the switching unit, the direct power supply mode refers to that current output by the power source is directly supplied to the concentrator, and the indirect mode refers to that current output by the power source is supplied to the concentrator after being converted through the current transformer.
Further: as in fig. 1, the switching unit has a current inlet terminal 1 and a current outlet terminal 2 for interfacing with a power source, and further comprises a first output terminal 5 and a second output terminal 8 for powering an electric energy meter, and a third output terminal 9 and a fourth output terminal 10 for powering a concentrator;
the primary side of the current transformer is provided with a first terminal 3 and a second terminal 4, and the secondary side is provided with a third terminal 6 and a fourth terminal 7;
the diverter switch comprises a first diverter switch 12 and a second diverter switch 11, wherein the public end of the first diverter switch 12 is connected with the current outlet end 2, the normally-closed end is connected with the first wiring end 3, the normally-open end is connected with the third wiring end 6, the public end of the second diverter switch 11 is connected with the third output end 9, the normally-closed end is connected with the fourth wiring end 7, and the normally-open end is connected with the second wiring end 4;
the third terminal 6 is connected to a fourth output 10, the current inlet terminal 1 is connected to the first output 5, and the second terminal 4 is connected to the second output 8.
The control device is connected to the first switch 12 and the second switch 11 respectively to control the first switch 12 and the second switch 11 to operate synchronously.
The first 12 and second 11 switches may be implemented by relays.
The power source can output three-phase currents to supply power for the concentrator and the electric energy meter, and each phase of current is respectively connected with the concentrator and a phase of current input terminal on the electric energy meter through a switching unit.
The working flow of the detection system is as follows:
after wiring is completed, a detector first determines the working current specification of the concentrator and the electric energy meter to be detected. If the concentrator needs to use a small current and the energy meter needs a large current, then the indirect power mode is used with the default setting maintained: the current output by the power source sequentially passes through the current inlet end 1, the first output end 5, a plurality of serially connected electric energy meters, the primary side of the current transformer and the current outlet end 2 to form a loop for supplying large current to the electric energy meters, and meanwhile, the small current converted by the current transformer is output on the secondary side and is supplied to the concentrator through the fourth wiring end 7, the third output end 9, a plurality of serially connected concentrators, the fourth output end 10 and the third wiring end 6. If the current specifications required by the concentrator and the electric energy meter are the same, the control device controls the first switch 12 and the second switch 11 to synchronously act and switch to a direct power supply mode, and at the moment, the current output by the power source sequentially passes through the current inlet end 1, the first output end 5, a plurality of electric energy meters connected in series, the second output end 8, the third output end 9, a plurality of concentrators connected in series, the fourth output end 10, the third wiring end 6 and the electric outlet end 2 to form a total loop, and the electric energy meter is connected in series with the concentrator to supply the same current.
Claims (5)
1. Three-phase intelligent ammeter analog detection system, its characterized in that: the power source comprises a power source, an electric energy meter and a concentrator connected with the electric energy meter;
the power source supplies power to the concentrator and the electric energy meter in a current mode through a switching unit, a current transformer and a change-over switch for switching the switching unit between a direct power supply mode and an indirect power supply mode are arranged in the switching unit, the direct power supply mode refers to that current output by the power source is directly supplied to the concentrator, and the indirect power supply mode refers to that current output by the power source is supplied to the concentrator after being converted through the current transformer;
the switching unit has a current inlet end (1) and a current outlet end (2) for connection to a power source, and further comprises a first output end (5) and a second output end (8) for supplying power to the electric energy meter, and a third output end (9) and a fourth output end (10) for supplying power to the concentrator;
the primary side of the current transformer is provided with a first wiring terminal (3) and a second wiring terminal (4), and the secondary side of the current transformer is provided with a third wiring terminal (6) and a fourth wiring terminal (7);
the diverter switch comprises a first diverter switch (12) and a second diverter switch (11), wherein the public end of the first diverter switch (12) is connected with a current outlet end (2), the normally closed end is connected with a first wiring end (3), the normally open end is connected with a third wiring end (6), the public end of the second diverter switch (11) is connected with a third output end (9), the normally closed end is connected with a fourth wiring end (7), and the normally open end is connected with a second wiring end (4);
the third wiring terminal (6) is connected with the fourth output end (10), the current inlet end (1) is connected with the first output end (5), and the second wiring terminal (4) is connected with the second output end (8).
2. The three-phase intelligent ammeter simulation test system according to claim 1, wherein: the control device is connected with the first change-over switch (12) and the second change-over switch (11) respectively to control the first change-over switch (12) to synchronously act with the second change-over switch (11).
3. The three-phase intelligent ammeter simulation test system according to claim 1, wherein: the concentrator is connected with the control device.
4. The three-phase intelligent ammeter simulation test system according to claim 1, wherein: the power source is connected with the control device.
5. The three-phase intelligent ammeter simulation test system according to any one of claims 1 to 4, wherein: the concentrator is connected with the electric energy meter through the collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611216293.2A CN106501761B (en) | 2016-12-26 | 2016-12-26 | Three-phase intelligent ammeter simulation detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611216293.2A CN106501761B (en) | 2016-12-26 | 2016-12-26 | Three-phase intelligent ammeter simulation detection system |
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| CN106501761A CN106501761A (en) | 2017-03-15 |
| CN106501761B true CN106501761B (en) | 2023-07-21 |
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Address after: 264003 Laishan City, Yantai province Venture Center, Shandong Applicant after: YANTAI DONGFANG WISDOM ELECTRIC Co.,Ltd. Address before: 264003 Laishan City, Yantai province Venture Center, Shandong Applicant before: YANTAI DONGFANG WISDOM ELECTRIC CO.,LTD. |
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