CN203275917U - Signal conditioner of distribution transformer remote monitoring system - Google Patents
Signal conditioner of distribution transformer remote monitoring system Download PDFInfo
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- CN203275917U CN203275917U CN 201320343258 CN201320343258U CN203275917U CN 203275917 U CN203275917 U CN 203275917U CN 201320343258 CN201320343258 CN 201320343258 CN 201320343258 U CN201320343258 U CN 201320343258U CN 203275917 U CN203275917 U CN 203275917U
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- signal conditioner
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Abstract
The utility model discloses a signal conditioner of a distribution transformer remote monitoring system. The signal conditioner comprises a first resistor, a second resistor, a first capacitor, a second capacitor and a following amplification circuit; one end of the second resistor is connected with one end of the first resistor and the other end of the second resistor is connected with an input terminal of the following amplification circuit; the other end of the first resistor is connected with an acquisition signal input line; and an output terminal of the following amplification circuit is connected with an conditioning signal output line. One end of the first capacitor is connected with a line between the first resistor and the second resistor, and the other end of the first capacitor is grounded; and one end of the second capacitor is connected with the line between the second resistor and the following amplification circuit, and the other end of the second capacitor is grounded. With adoption of the above structure, the signal conditioner of the distribution transformer remote monitoring system is simple in integral structure, uses a small number of elements, and is low in cost and easy for realization; and the signal conditioner, when in use, can filter the high frequency signal in the acquisition signal, prevent the frequency spectrum aliasing of the signal and the high frequency interference, and can guarantee the controller of the monitoring system to make a correct judgment.
Description
Technical field
The utility model relates to the backup system of substation transformer, specifically the signal conditioner of substation transformer long distance control system.
Background technology
Along with industrial expansion, all trades and professions improve day by day to the power supply reliability of electric system and the requirement of stability, substation transformer is as the core link of electric system, and it is electric energy directly to be distributed to the power equipment of low-voltage customer, and its service data is the basic data of whole power distribution network.Therefore, the safe operation of substation transformer is most important to electric system.For substation transformer is monitored, existing distribution power transformation device generally is equipped with supervisory system, and supervisory system is usually come analyzing and processing by the voltage signal that gathers substation transformer, and then realizes the remote monitoring to distribution power transformation device.Be accompanied by high-frequency signal in the signal that existing supervisory system collects, be prone to spectral aliasing and high frequency interference, and then the controller that can affect distribution power transformation device supervisory system is made correct control.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of can filtering collection signal medium-high frequency signal, and then can avoid occurring the signal conditioner of the substation transformer long distance control system of spectral aliasing and high frequency interference.
the purpose of this utility model is achieved through the following technical solutions: the signal conditioner of substation transformer long distance control system, comprise the first resistance, the second resistance, the first electric capacity, the second electric capacity and follow amplifying circuit, described the second resistance two ends respectively with the first resistance be connected input amplifier and be connected, the other end that the first resistance connects the second resistance terminal relatively is connected with the collection signal input line, described output terminal of following amplifying circuit is connected with the conditioned signal output line, described the first electric capacity one end is connected on circuit between the first resistance and the second resistance, its other end ground connection, described the second electric capacity one end is connected to the second resistance and follows on circuit between input amplifier its other end ground connection.When the utility model is used, the voltage signal that collects is exported from the conditioned signal output line after the utility model is processed, wherein through the input of collection signal input line, follow amplifying circuit and have the high impedance matching properties, can reduce signal and carry out the loss of postorder when processing.
The signal conditioner of substation transformer long distance control system also comprises the transient voltage twin zener dioder, and described transient voltage twin zener dioder one end is connected on the collection signal input line, its other end ground connection.Wherein, the transient voltage twin zener dioder can suppress the glitch of voltage or electric current, prevent the unexpected rising of voltage and current, when the transient voltage twin zener dioder stands high energy impact events, it can make with high speed its impedance suddenly reduce, absorb simultaneously a large electric current, with the voltage clamp between its two ends on a predetermined numerical value, thereby the circuit component of guaranteeing the back is subjected to the high-octane impact of transient state and damages.
As preferably, described follow circuit is made of the first operational amplifier, and described the second resistance is connected with the in-phase input end of the first operational amplifier, and the inverting input of described the first operational amplifier is connected with its output terminal.
The first operational amplifier of the present utility model both can adopt common source with other element in supervisory system, also can adopt independent current source, controls power supply for the ease of independent, and as preferably, described the first operational amplifier is connected with power supply.
compared with prior art, the utlity model has following beneficial effect: the utility model comprises the first resistance, the second resistance, the first electric capacity, the second electric capacity and follow amplifying circuit, the utility model uses element few, be convenient to realize, cost is low, in the utility model, the first resistance and the first electric capacity consist of elementary low-pass filter circuit, the second resistance and the second electric capacity consist of secondary low-pass filter circuit, under the effect of two stage filter circuit, energy filtering high-frequency signal, so, can avoid occurring spectral aliasing and high frequency interference, and then the controller that can avoid high-frequency signal to affect distribution power transformation device supervisory system is made correct control.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
In accompanying drawing, the corresponding name of Reference numeral is called: 1, collection signal input line, 2, the conditioned signal output line, R1, the first resistance, R2, the second resistance, C1, the first electric capacity, C2, the second electric capacity, D1, transient voltage twin zener dioder, A1, the first operational amplifier, VCC, power supply.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, the signal conditioner of substation transformer long distance control system, comprise the first resistance R 1, the second resistance R 2, the first capacitor C 1, the second capacitor C 2, follow amplifying circuit and transient voltage twin zener dioder D1, wherein, following amplifying circuit preferably adopts the first operational amplifier A 1 to realize, the inverting input of the first operational amplifier A 1 is connected with its output terminal, and the first operational amplifier A 1 is connected with power supply VCC and is provided with ground path.The second resistance R 2 two ends respectively with the first resistance R 1 be connected operational amplifier A 1 in-phase input end and be connected, the output terminal that the first relative other end that connects the second resistance R 2 ends of resistance R 1 is connected with collection signal input line 1, the first operational amplifier A 1 is connected with conditioned signal output line 2.The first capacitor C 1 one ends are connected on circuit between the first resistance R 1 and the second resistance R 2, its other end ground connection.The second capacitor C 2 one ends are connected on circuit between the second resistance R 2 and the first operational amplifier A 1 in-phase input end, its other end ground connection.Transient voltage twin zener dioder D1 one end is connected on collection signal input line 1, its other end ground connection.
When the present embodiment is used, collection signal is from 1 input of collection signal input line, and after the two-stage low-pass filter circuit filtering high-frequency signal that the first resistance R 1, the second resistance R 2, the first capacitor C 1 and the second capacitor C 2 consist of, then after processing, the first operational amplifier A 1 exports from conditioned signal output line 2.
Above content is the further description of the utility model being done in conjunction with concrete preferred implementation, can not assert that embodiment of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, not breaking away from other embodiments that draw under the technical solution of the utility model, all should be included in protection domain of the present utility model.
Claims (4)
1. the signal conditioner of substation transformer long distance control system, it is characterized in that: comprise the first resistance (R1), the second resistance (R2), the first electric capacity (C1), the second electric capacity (C2) and follow amplifying circuit, described the second resistance (R2) two ends respectively with the first resistance (R1) be connected input amplifier and be connected, the other end that the first resistance (R1) connects the second resistance (R2) end relatively is connected with collection signal input line (1), described output terminal of following amplifying circuit is connected with conditioned signal output line (2), described the first electric capacity (C1) end is connected on circuit between the first resistance (R1) and the second resistance (R2), its other end ground connection, described the second electric capacity (C2) end is connected to the second resistance (R2) and follows on circuit between input amplifier its other end ground connection.
2. the signal conditioner of substation transformer long distance control system according to claim 1, it is characterized in that: also comprise transient voltage twin zener dioder (D1), described transient voltage twin zener dioder (D1) end is connected on collection signal input line (1), its other end ground connection.
3. the signal conditioner of substation transformer long distance control system according to claim 1 and 2, it is characterized in that: described follow circuit is made of the first operational amplifier (A1), described the second resistance (R2) is connected with the in-phase input end of the first operational amplifier (A1), and the inverting input of described the first operational amplifier (A1) is connected with its output terminal.
4. the signal conditioner of substation transformer long distance control system according to claim 3, it is characterized in that: described the first operational amplifier (A1) is connected with power supply (VCC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320343258 CN203275917U (en) | 2013-06-17 | 2013-06-17 | Signal conditioner of distribution transformer remote monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320343258 CN203275917U (en) | 2013-06-17 | 2013-06-17 | Signal conditioner of distribution transformer remote monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203275917U true CN203275917U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320343258 Expired - Fee Related CN203275917U (en) | 2013-06-17 | 2013-06-17 | Signal conditioner of distribution transformer remote monitoring system |
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| Country | Link |
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| CN (1) | CN203275917U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368525A (en) * | 2013-06-17 | 2013-10-23 | 成都荣耀科技有限公司 | Signal conditioning module of distribution transformer remote monitoring system |
-
2013
- 2013-06-17 CN CN 201320343258 patent/CN203275917U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368525A (en) * | 2013-06-17 | 2013-10-23 | 成都荣耀科技有限公司 | Signal conditioning module of distribution transformer remote monitoring system |
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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 |
Granted publication date: 20131106 Termination date: 20140617 |
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| EXPY | Termination of patent right or utility model |