CN208547664U - A kind of detection device grid-connected for electric power - Google Patents
A kind of detection device grid-connected for electric power Download PDFInfo
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- CN208547664U CN208547664U CN201820495865.3U CN201820495865U CN208547664U CN 208547664 U CN208547664 U CN 208547664U CN 201820495865 U CN201820495865 U CN 201820495865U CN 208547664 U CN208547664 U CN 208547664U
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 48
- 238000004891 communication Methods 0.000 claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
A kind of detection device grid-connected for electric power, including voltage sampling circuit, current sampling circuit and RS485 communication interface circuit；The voltage sampling circuit has three groups, is respectively used to the sampling of A, B, C three-phase voltage of detection three phase inverter bridge circuit output；The input terminal of the voltage sampling circuit A with three phase inverter bridge circuit output respectively, the voltage end and common of B or C phase are electrically connected, the voltage end and common of the voltage sampling circuit are electrically connected after being electrically connected respectively with dropping resistor and filter capacitor with amplifier, the dropping resistor includes at least two, the amplifier is the inversion pressure stabilizing amplifier being made of OPA2227, the output end of OPA2227 amplifier is electrically connected with voltage follower, the output end of the voltage follower is voltage sample value, and it is sent voltage sample information in bus by the RS485 communication interface circuit.
Description
Technical field
The utility model relates to a kind of detection devices grid-connected for electric power.
Background technique
The detection of the power network of the prior art disperses, and cannot be detected well, while detection system is complicated inconvenient
It is detected at a distance, on-site test signal is easy to be interfered.
Utility model content
To overcome prior art problem, the utility model provides a kind of detection device grid-connected for electric power.
A kind of detection device grid-connected for electric power, including voltage sampling circuit, current sampling circuit and RS485 communication connect
Mouth circuit；
The voltage sampling circuit has three groups, is respectively used to A, B, C three-phase voltage of detection three phase inverter bridge circuit output
Sampling；The input terminal of the voltage sampling circuit voltage end and public affairs with A, B or C phase of three phase inverter bridge circuit output respectively
Common ground electrical connection, the voltage end and common of the voltage sampling circuit are electrically connected with dropping resistor and filter capacitor respectively
It is electrically connected after connecing with amplifier, the dropping resistor includes at least two, and the amplifier is the inversion pressure stabilizing fortune being made of OPA2227
It puts, the output end of OPA2227 amplifier is electrically connected with voltage follower, and the output end of the voltage follower is voltage sample value,
And it is sent voltage sample information in bus by the RS485 communication interface circuit；
The current sampling circuit has three groups, is respectively used to A, B, C three-phase current of detection three phase inverter bridge circuit output
Sampling；The inductance coil of the current sampling circuit is configured on the electric wire of A, B or C phase of three phase inverter bridge circuit output,
The inductance coil is electrically connected by current-limiting resistance with the current detecting amplifier that LM324 is constituted, and the current detecting amplifier will be mutual
The induced current of sense coil is converted to corresponding dynamic voltage value output, the output end and voltage follow of the current detecting amplifier
Device electrical connection, the output end of the voltage follower is the current sampling data by voltage analog, and is communicated by the RS485
Interface circuit sends voltage sample information in bus；
The RS485 communication interface circuit is used to send bus for voltage sample value and current sampling data.
Preferably, the circuit that the communication chip that the RS485 communication interface circuit is ADUM1301ARWZ is constituted.
Preferably, 2 feet of the communication chip of the ADUM1301ARWZ and 3 feet connect the RTS of 485 buses by optocoupler
Pin, 4 feet of the communication chip of ADUM1301ARWZ connect the TXD pin of 485 buses by optocoupler, and ADUM1301ARWZ's is logical
Believe that 1 foot of chip connects the RXD pin of 485 buses by optocoupler.
Preferably, the voltage follower of the voltage sampling circuit is by identical with the amplifier of the voltage sampling circuit
OPA2227 amplifier is constituted.
It preferably, further include the base being made of OP07 between the output end and voltage follower of the OPA2227 amplifier
Quasi- voltage follower circuit, the reference voltage follower circuit is for outputting reference voltage value and is connected to voltage follower
Same Name of Ends, the voltage of the Same Name of Ends for raising voltage follower, to be raised by the voltage of the Same Name of Ends of voltage follower
The voltage of the output end of pylon follower.
The utility model has the beneficial effects that
The voltage sampling circuit of the detection device grid-connected for electric power provided by the utility model has the function of voltage follow,
The sampled voltage for raising output by setting simultaneously, prevents from interfering, current value is similarly modeled as voltage by current sampling circuit
Value is exported, and raises voltage simultaneously also by voltage follower circuit, is guaranteed the accuracy and anti-interference of detection, is passed through simultaneously
RS485 communication interface circuit carries out the transmission of bus communication data and guarantees the accuracy of information and intervention is facilitated remotely to be supervised
Control.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the detection device grid-connected for electric power of the utility model；
Fig. 2 is the voltage sampling circuit structural schematic diagram of the detection device grid-connected for electric power of the utility model；
Fig. 3 is the current sampling circuit structural schematic diagram of the detection device grid-connected for electric power of the utility model；
Fig. 4 is the RS485 communication interface circuit structural schematic diagram of the detection device grid-connected for electric power of the utility model.
Specific embodiment:
The utility model is described further with reference to the accompanying drawing: as shown in Figure 1, a kind of detection grid-connected for electric power
Device, including voltage sampling circuit 1, current sampling circuit 2 and RS485 communication interface circuit 3；
Voltage sampling circuit as described in Figure 2 has three groups, is respectively used to A, B, C three-phase of detection three phase inverter bridge circuit output
The sampling of voltage；The input terminal of the voltage sampling circuit voltage end with A, B or C phase of three phase inverter bridge circuit output respectively
With common be electrically connected, the voltage end and common of the voltage sampling circuit respectively with dropping resistor and filter capacitor
It is electrically connected after electrical connection with amplifier, the dropping resistor includes at least two, and the amplifier is that the inversion that is made of OPA2227 is steady
Press amplifier；By taking A phase as an example, input terminal connection A phase output terminal (A is indicated in figure) of voltage sampling circuit and output common end (figure
Middle mark N), after the alternating voltage of input is depressured by the reduction voltage circuit being made of resistance R103, R104, R107 and R108, then
The filter circuit filtering being made up of inductance (L2 or L3), is then input to amplifier by pressure limiting resistance R102 or R109 again
The inversion voltage regulator circuit that OPA2227 is constituted, inversion voltage regulator circuit are returned for intelligent transformer substation voltage combining unit and associated voltage
The inspection on road；The output end of OPA2227 amplifier is electrically connected with voltage follower, is current limliting between output end and voltage follower
Resistance R106, the output end of the voltage follower are voltage sample value, export sampled voltage Uan, and logical by the RS485
Letter interface circuit sends voltage sample information in bus；The voltage follower of the voltage sampling circuit by with the voltage
The identical OPA2227 amplifier of the amplifier of sample circuit is constituted, and so facilitates buying and maintenance；The OPA2227 amplifier it is defeated
It further include the reference voltage follower circuit being made of OP07 between outlet and voltage follower, the reference voltage follower electricity
Road is used for outputting reference voltage value and is connected to the Same Name of Ends of voltage follower, and reference voltage follower circuit is for raising voltage
The voltage of the Same Name of Ends of follower, to raise the output end of pylon follower by the voltage of the Same Name of Ends of voltage follower
Voltage.
As shown in figure 3, the current sampling circuit has three groups, be respectively used to detection three phase inverter bridge circuit output A, B,
The sampling of C three-phase current；The inductance coil of the current sampling circuit is configured at A, B or C phase of three phase inverter bridge circuit output
Electric wire on, the inductance coil is electrically connected by current-limiting resistance with the current detecting amplifier that LM324 is constituted, the current detecting
The induced current of mutual inductor is converted to corresponding dynamic voltage value output by amplifier, the output end of the current detecting amplifier with
Voltage follower electrical connection, the output end of the voltage follower are the current sampling data by voltage analog, and by described
RS485 communication interface circuit sends voltage sample information in bus, current detecting amplifier and voltage follower include by
The reference voltage follower that LM324 is constituted；By taking A phase as an example, by by amplifier LM324 and resistance R151 and resistance R149 process
Circuit conversion be voltage signal after, then voltage value raised VREFOUT1 by the circuit by being made of amplifier LM324, is finally led to
Overvoltage follower circuit exports current sampling signal (voltage value).
The RS485 communication interface circuit is used to send bus for voltage sample value and current sampling data.It is described
The circuit that the communication chip that RS485 communication interface circuit is ADUM1301ARWZ is constituted.
2 feet and 3 feet of the communication chip of the ADUM1301ARWZ connect the RTS pin of 485 buses by optocoupler,
4 feet of the communication chip of ADUM1301ARWZ connect the TXD pin of 485 buses, the communication core of ADUM1301ARWZ by optocoupler
1 foot of piece connects the RXD pin of 485 buses by optocoupler.Specifically: RS485 communication interface exports 3 road signals, respectively
Wherein 485RXD is 485 communications reception pins by 485RXD, 485RTS and 485TXD, and 485TXD is that 485 communications send pin,
485RTS is the control pin of 485 communications；Communication interface circuit is constituted using the communication chip of model ADUM1301ARWZ
Circuit；1 foot of chip connects 485RXD pin by optocoupler, sends data for external；2 feet and 3 feet of chip pass through optocoupler
485RTS pin is connected, for receiving 485 control commands sent, is led to restart 485 communication chips in real time or stop 485
Believe the work of chip and reduces power consumption；4 feet of chip connect 485TXD pin by optocoupler, for receiving the number being sent out
According to；5 feet of chip are directly grounded, and 7 feet connect positive pole, and 6 feet and 7 feet then export 485 communications pins of two-way.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (5)
1. a kind of detection device grid-connected for electric power, it is characterised in that:
Including voltage sampling circuit, current sampling circuit and RS485 communication interface circuit；
The voltage sampling circuit has three groups, is respectively used to adopting for A, B, C three-phase voltage of detection three phase inverter bridge circuit output
Sample；The input terminal of the voltage sampling circuit is respectively with the voltage end of A, B or C phase of three phase inverter bridge circuit output and publicly
End electrical connection, after the voltage end and common of the voltage sampling circuit are electrically connected with dropping resistor and filter capacitor respectively
It being electrically connected with amplifier, the dropping resistor includes at least two, and the amplifier is the inversion pressure stabilizing amplifier being made of OPA2227,
The output end of OPA2227 amplifier is electrically connected with voltage follower, and the output end of the voltage follower is voltage sample value, and is led to
The RS485 communication interface circuit is crossed to send voltage sample information in bus；
The current sampling circuit has three groups, is respectively used to adopting for A, B, C three-phase current of detection three phase inverter bridge circuit output
Sample；The inductance coil of the current sampling circuit is configured on the electric wire of A, B or C phase of three phase inverter bridge circuit output, described
Inductance coil is electrically connected by current-limiting resistance with the current detecting amplifier that LM324 is constituted, and the current detecting amplifier is by mutual inductance line
The induced current of circle is converted to corresponding dynamic voltage value output, output end and the voltage follower electricity of the current detecting amplifier
Connection, the output end of the voltage follower is the current sampling data by voltage analog, and passes through the RS485 communication interface
Circuit sends voltage sample information in bus；
The RS485 communication interface circuit is used to send bus for voltage sample value and current sampling data.
2. the detection device grid-connected for electric power according to claim 1, it is characterised in that: the RS485 communication interface
The circuit that the communication chip that circuit is ADUM1301ARWZ is constituted.
3. the detection device grid-connected for electric power according to claim 2, it is characterised in that: the ADUM1301ARWZ's
2 feet and 3 feet of communication chip connect the RTS pin of 485 buses by optocoupler, and 4 feet of the communication chip of ADUM1301ARWZ are logical
The TXD pin that optocoupler connects 485 buses is crossed, 1 foot of the communication chip of ADUM1301ARWZ connects 485 buses by optocoupler
RXD pin.
4. the detection device grid-connected for electric power according to claim 1, it is characterised in that: the voltage sampling circuit
Voltage follower is made of OPA2227 amplifier identical with the amplifier of the voltage sampling circuit.
5. the detection device grid-connected for electric power according to claim 4, it is characterised in that: the OPA2227 amplifier
It further include the reference voltage follower circuit being made of OP07, the reference voltage follower between output end and voltage follower
Circuit is for outputting reference voltage value and be connected to the Same Name of Ends of voltage follower, for raising the Same Name of Ends of voltage follower
Voltage, to raise the voltage of the output end of pylon follower by the voltage of the Same Name of Ends of voltage follower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820495865.3U CN208547664U (en) | 2018-04-09 | 2018-04-09 | A kind of detection device grid-connected for electric power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820495865.3U CN208547664U (en) | 2018-04-09 | 2018-04-09 | A kind of detection device grid-connected for electric power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208547664U true CN208547664U (en) | 2019-02-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820495865.3U Active CN208547664U (en) | 2018-04-09 | 2018-04-09 | A kind of detection device grid-connected for electric power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618704A (en) * | 2019-09-03 | 2019-12-27 | 浙江捷昌线性驱动科技股份有限公司 | Lifting platform control system |
| CN111323641A (en) * | 2020-03-10 | 2020-06-23 | 南京日新科技有限公司 | Current and voltage sampling circuit |
-
2018
- 2018-04-09 CN CN201820495865.3U patent/CN208547664U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618704A (en) * | 2019-09-03 | 2019-12-27 | 浙江捷昌线性驱动科技股份有限公司 | Lifting platform control system |
| CN111323641A (en) * | 2020-03-10 | 2020-06-23 | 南京日新科技有限公司 | Current and voltage sampling circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Detection apparatus for be used for electric power to be incorporated into power networks Effective date of registration: 20200420 Granted publication date: 20190226 Pledgee: Jiangsu Zijin rural commercial bank Limited by Share Ltd. branch of science and technology Pledgor: NANJING BOSWELL INDUSTRIAL COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: Y2020980001619 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20211118 Granted publication date: 20190226 Pledgee: Jiangsu Zijin rural commercial bank Limited by Share Ltd. branch of science and technology Pledgor: NANJING BOSWELL INDUSTRIAL COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: Y2020980001619 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A detection device for power grid connection Effective date of registration: 20211125 Granted publication date: 20190226 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: NANJING BOSWELL INDUSTRIAL COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: Y2021320000355 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220907 Granted publication date: 20190226 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: NANJING BOSWELL INDUSTRIAL COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: Y2021320000355 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A detection device for power grid connection Effective date of registration: 20220916 Granted publication date: 20190226 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: NANJING BOSWELL INDUSTRIAL COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: Y2022320000552 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231031 Granted publication date: 20190226 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: NANJING BOSWELL INDUSTRIAL COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: Y2022320000552 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A detection device for power grid connection Effective date of registration: 20231103 Granted publication date: 20190226 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: NANJING BOSWELL INDUSTRIAL COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: Y2023320000552 |