CN204694769U - A kind of novel Distribution transformer - Google Patents
A kind of novel Distribution transformer Download PDFInfo
- Publication number
- CN204694769U CN204694769U CN201520220170.0U CN201520220170U CN204694769U CN 204694769 U CN204694769 U CN 204694769U CN 201520220170 U CN201520220170 U CN 201520220170U CN 204694769 U CN204694769 U CN 204694769U
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- China
- Prior art keywords
- chip
- filtering circuit
- distribution transformer
- resistance
- sampling
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Abstract
The utility model belongs to power system monitor field, and provide a kind of novel Distribution transformer, novel Distribution transformer comprises the current transformer being connected in described consumer; Be connected in the filtering circuit of described current transformer; Be connected in the sampling A/D chip of described filtering circuit, the sampling electric signal input end of described sampling A/D chip is connected with the filtered electrical signal output terminal of described filtering circuit; Be connected in the computation chip of described filtering circuit, the metering electric signal input end of described computation chip is connected with the filtered electrical signal output terminal of described filtering circuit.In the utility model, sampling A/D chip can by the filtering circuit shared, sampling electric signal, is ensureing, under the prerequisite that Distribution transformer normally uses, to save wiring cost, improve the degree of integration of Distribution transformer simultaneously.
Description
Technical field
The utility model belongs to power system monitor field, particularly relates to a kind of novel Distribution transformer.
Background technology
Distribution transformer is a kind of Real-Time Monitoring and the device controlling electricity equipment.In electric system, Distribution transformer is the terminal of power distribution network, is again the equipment foremost of user power utilization, plays a part to form a connecting link in power distribution network.By Distribution transformer, the automation functions such as consumer supervision, control, metering and protection can be completed.
But existing Distribution transformer, needs to adopt independent protective loop, could protect the consumer connected, connect up loaded down with trivial details and be unfavorable for safeguarding.Its reason is; in existing electric system; the electric wire be connected with Distribution transformer, generally needing layout two loops, is measuring circuit and protective loop respectively; measuring circuit is used for measuring electric quantity; protective loop, for electric signal of sampling, generates electricity sampled value, when electricity sampled value is too high; namely the circuit of consumer is cut off, the consumer connected to protect Distribution transformer.And the wiring process in two loops is loaded down with trivial details, and when electric wire breaks down, be unfavorable for safeguarding.
Utility model content
The utility model provides a kind of novel Distribution transformer, is intended to solve existing Distribution transformer, needs to adopt independent protective loop, could protect the consumer of connection, connects up loaded down with trivial details and is unfavorable for the problem of maintenance.
In order to solve the problems of the technologies described above, the utility model is achieved in that
A novel Distribution transformer, external consumer, described novel Distribution transformer comprises:
Be connected in the current transformer of described consumer;
Be connected in the filtering circuit of described current transformer;
Be connected in the sampling A/D chip of described filtering circuit, the sampling electric signal input end of described sampling A/D chip is connected with the filtered electrical signal output terminal of described filtering circuit;
Be connected in the computation chip of described filtering circuit, the metering electric signal input end of described computation chip is connected with the filtered electrical signal output terminal of described filtering circuit.
Further, in novel Distribution transformer, described filtering circuit comprises:
Resistance R1, resistance R2, resistance R3, resistance R4, amplifier U1 and power supply VCC;
The first end of described resistance R1 and the first end of described resistance R3 connect altogether, and its common port is the input end of described filtering circuit, the second end ground connection of described resistance R1;
After described resistance R2 is in parallel with electric capacity C1, second end of a common port and described resistance R3 is connected on the in-phase input end of described amplifier U1 altogether, another common end grounding;
The first end of described resistance R4 is connected on the inverting input of described amplifier U1, the second end ground connection of described resistance R4;
Described power supply VCC is connected with the feeder ear of described amplifier U1, and the electrical signal of described amplifier U1 is the filtered electrical signal output terminal of described filtering circuit.
Further, in novel Distribution transformer, described sampling A/D chip adopts chip U2, the feeder ear A1 of described chip U2 is connected with the first end of pull-up resistor R5, the sampling electric signal input end A2 of the second termination power VCC of described pull-up resistor R5, described chip U2 is connected with the filtered electrical signal output terminal of described filtering circuit.
Further, in novel Distribution transformer, described computation chip adopts chip U3, and the metering electric signal input end B1 of described chip U3 is connected with the filtered electrical signal output terminal of described filtering circuit.
Further, in novel Distribution transformer, described current transformer is many tap current mutual inductor or straight-through current transformer.
Further, in novel Distribution transformer, described Distribution transformer also comprises:
Be connected in the wireless transceiver of described computation chip, the interface of the connection antenna of described wireless transceiver is electric quantity data access end.
In the utility model, adopt the design of convolution, sampling A/D chip and computation chip share a filtering circuit; solve existing Distribution transformer; need to adopt independent protective loop, could protect the consumer of connection, connect up loaded down with trivial details and be unfavorable for the problem of maintenance.Sampling A/D chip can by the filtering circuit shared; sampling electric signal; generate electricity sampled value; when electricity sampled value is too high; namely cut off the circuit of consumer, to protect the consumer of connection, ensureing under the prerequisite that Distribution transformer normally uses; save wiring cost, improve the degree of integration of Distribution transformer simultaneously.
Accompanying drawing explanation
Fig. 1 is the utility model
embodiment onethe structured flowchart of a kind of novel Distribution transformer provided;
Fig. 2 is the utility model
embodiment twothe circuit diagram of a kind of novel Distribution transformer provided.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
embodiment one
The utility model with reference to figure 1, Fig. 1
embodiment onethe structured flowchart of a kind of novel Distribution transformer provided, for convenience of explanation, only list the part relevant to the utility model embodiment, details are as follows:
A novel Distribution transformer, external consumer, described novel Distribution transformer comprises:
Be connected in the current transformer 10 of described consumer;
Be connected in the filtering circuit 20 of described current transformer 10;
Be connected in the sampling A/D chip 30 of described filtering circuit 20, the sampling electric signal input end of described sampling A/D chip 30 is connected with the filtered electrical signal output terminal of described filtering circuit 20;
Be connected in the computation chip 40 of described filtering circuit 20, the metering electric signal input end of described computation chip 40 is connected with the filtered electrical signal output terminal of described filtering circuit 20.
Its principle of work is as follows:
After filtering circuit 20 filters clutter, export electric signal to sampling A/D chip 30 and computation chip 40, sampling A/D chip 30 is sampled electric signal, generates electricity sampled value, when electricity sampled value is too high, namely cuts off the circuit of consumer, to protect the consumer of connection.Computation chip 40 calculates electric signal, exports electricity to display device.
In the utility model, adopt the design of convolution, sampling A/D chip 30 and computation chip 40 share a filtering circuit 20; solve existing Distribution transformer; need to adopt independent protective loop, could protect the consumer of connection, connect up loaded down with trivial details and be unfavorable for the problem of maintenance.Under guarantee sampling precision prerequisite, save wiring cost, improve the degree of integration of Distribution transformer simultaneously.
embodiment two
The enforcement of the present embodiment is based upon on the basis of embodiment one.The utility model with reference to figure 2, Fig. 2
embodiment twothe circuit diagram of a kind of novel Distribution transformer provided, details are as follows:
In described novel Distribution transformer, described filtering circuit 20 comprises:
Resistance R1, resistance R2, resistance R3, resistance R4, amplifier U1 and power supply VCC;
The first end of described resistance R1 and the first end of described resistance R3 connect altogether, and its common port is the input end of described filtering circuit, the second end ground connection of described resistance R1;
After described resistance R2 is in parallel with electric capacity C1, second end of a common port and described resistance R3 is connected on the in-phase input end of described amplifier U1 altogether, another common end grounding;
The first end of described resistance R4 is connected on the inverting input of described amplifier U1, the second end ground connection of described resistance R4;
Described power supply VCC is connected with the feeder ear of described amplifier U1, and the electrical signal of described amplifier U1 is the filtered electrical signal output terminal of described filtering circuit.
Described sampling A/D chip 30 adopts chip U2, the feeder ear A1 of described chip U2 is connected with the first end of pull-up resistor R5, the sampling electric signal input end A2 of power supply VCC described in second termination of described pull-up resistor R5, described chip U2 is connected with the filtered electrical signal output terminal of described filtering circuit 20.
Described computation chip 40 adopts chip U3, and the metering electric signal input end B1 of described chip U3 is connected with the filtered electrical signal output terminal of described filtering circuit 20.
Wherein, described R1 is parallel to the output terminal of current transformer 10.
Wherein, chip U2 can adopt the chip of MAX11046 series.Chip U3 can adopt the chip of ATT7022E series.
Its principle of work is as follows:
Current transformer 10 adopts mutual inductor CT; resistance R1 is connected in parallel on the output terminal of current transformer 10CT; export electric signal; resistance R1, resistance R2, resistance R3 form π type attenuation network; for reducing the signal amplitude of electric signal; and complete impedance transformation; resistance R4; add the input impedance of amplifier; lower the output impedance of amplifier; the change of the electric signal that amplifier is exported, along more precipitous, be convenient to sampling A/D chip 30 pairs of electric signal and sampled, and connects the consumer of Distribution transformer according to the protection of electricity sampled value.
Computation chip 40 pairs of electric signal are sampled, and calculate electricity, and by wireless transceiver distribution electric quantity data to the terminal associated.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a novel Distribution transformer, external consumer, is characterized in that, described novel Distribution transformer comprises:
Be connected in the current transformer of described consumer;
Be connected in the filtering circuit of described current transformer;
Be connected in the sampling A/D chip of described filtering circuit, the sampling electric signal input end of described sampling A/D chip is connected with the filtered electrical signal output terminal of described filtering circuit;
Be connected in the computation chip of described filtering circuit, the metering electric signal input end of described computation chip is connected with the filtered electrical signal output terminal of described filtering circuit.
2. Distribution transformer novel as claimed in claim 1, is characterized in that, described filtering circuit comprises:
Resistance R1, resistance R2, resistance R3, resistance R4, amplifier U1 and power supply VCC;
The first end of described resistance R1 and the first end of described resistance R3 connect altogether, and its common port is the input end of described filtering circuit, the second end ground connection of described resistance R1;
After described resistance R2 is in parallel with electric capacity C1, second end of a common port and described resistance R3 is connected on the in-phase input end of described amplifier U1 altogether, another common end grounding;
The first end of described resistance R4 is connected on the inverting input of described amplifier U1, the second end ground connection of described resistance R4;
Described power supply VCC is connected with the feeder ear of described amplifier U1, and the electrical signal of described amplifier U1 is the filtered electrical signal output terminal of described filtering circuit.
3. Distribution transformer novel as claimed in claim 1, it is characterized in that, described sampling A/D chip adopts chip U2, the feeder ear A1 of described chip U2 is connected with the first end of pull-up resistor R5, the sampling electric signal input end A2 of the second termination power VCC of described pull-up resistor R5, described chip U2 is connected with the filtered electrical signal output terminal of described filtering circuit.
4. Distribution transformer novel as claimed in claim 1, is characterized in that, described computation chip adopts chip U3, and the metering electric signal input end B1 of described chip U3 is connected with the filtered electrical signal output terminal of described filtering circuit.
5. Distribution transformer novel as claimed in claim 1, is characterized in that, described current transformer is many tap current mutual inductor or straight-through current transformer.
6. Distribution transformer novel as claimed in claim 1, is characterized in that, described Distribution transformer also comprises:
Be connected in the wireless transceiver of described computation chip, the interface of the connection antenna of described wireless transceiver is electric quantity data access end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520220170.0U CN204694769U (en) | 2015-04-13 | 2015-04-13 | A kind of novel Distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520220170.0U CN204694769U (en) | 2015-04-13 | 2015-04-13 | A kind of novel Distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204694769U true CN204694769U (en) | 2015-10-07 |
Family
ID=54235045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520220170.0U Expired - Fee Related CN204694769U (en) | 2015-04-13 | 2015-04-13 | A kind of novel Distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204694769U (en) |
-
2015
- 2015-04-13 CN CN201520220170.0U patent/CN204694769U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20200413 |