CN203275502U - Signal acquisition module of remote monitoring system of distribution transformer - Google Patents
Signal acquisition module of remote monitoring system of distribution transformer Download PDFInfo
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- CN203275502U CN203275502U CN 201320343246 CN201320343246U CN203275502U CN 203275502 U CN203275502 U CN 203275502U CN 201320343246 CN201320343246 CN 201320343246 CN 201320343246 U CN201320343246 U CN 201320343246U CN 203275502 U CN203275502 U CN 203275502U
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- resistance
- operational amplifier
- acquisition module
- resistor
- electric capacity
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Abstract
The utility model discloses a signal acquisition module of a remote monitoring system of a distribution transformer. The signal acquisition module comprises a current transformer, a first operational amplifier, a first resistor, a second resistor, the third resistor, a first capacitor, a second capacitor, and a third capacitor. The current transformer is connected with a noninverting input terminal and the inverting input terminal of the operational amplifier. The first capacitor and the third resistor are in series connection to form a first series branch; the first series branch, the second resistor and the second capacitor are in parallel connection to form a first parallel branch; two ends of the first parallel branch are respectively connected with the inverting input terminal and the inverting output terminal of the first operational amplifier. One end of the first resistor is connected with an output end of the first operational amplifier, and the other end of the first resistor is connected with an acquisition signal output line; and one end of the third capacitor is connected with the line between the output end of the first operational amplifier and the first resistor. The signal acquisition module of the remote monitoring system of the distribution transformer uses fewer components and is low in cost; and the regulation is convenient when the collected high current is converted into the needed small voltage signal, so that the popularization and the application are facilitated.
Description
Technical field
The utility model relates to the backup system of substation transformer, specifically the signal acquisition module 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 current signal that gathers substation transformer, and then realizes the remote monitoring to distribution power transformation device.Wherein, the signal of the distribution power transformation device that collects is large current signal, and in supervisory system, the controller of monitor terminal generally can only be processed the small voltage signal, and the large current signal that therefore needs sensor is collected changes into the small voltage signal.Circuit structure designed when the supervisory system of existing substation transformer changes into small voltage with large electric current is complicated, uses element more, and cost is high, and it is loaded down with trivial details that large current signal is adjusted to the small voltage process of supervisory system middle controller demand.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of signal acquisition module of substation transformer long distance control system is provided, and it uses element few, and cost is low, is convenient to debugging, and then easy to utilize.
the purpose of this utility model is achieved through the following technical solutions: the signal acquisition module of substation transformer long distance control system, comprise current transformer, the first operational amplifier, the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity, two output terminals of described current transformer are connected with inverting input with the in-phase input end of the first operational amplifier respectively, described the first electric capacity is connected with the 3rd resistance and is consisted of the first series arm, described the first series arm, the second resistance and the second electric capacity three formation in parallel the first parallel branch, described the first parallel branch two ends are connected with output terminal with the inverting input of the first operational amplifier respectively, described the first resistance one end is connected with the first operational amplifier output terminal, and its other end is connected with the collection signal outlet line, described the 3rd electric capacity one end is connected on circuit between the first operational amplifier output terminal and the first resistance, its other end ground connection.When the utility model was used, current transformer carried out the current signal collection, the signal output after the collection signal outlet line is used for changing.
Described the first operational amplifier is connected with power supply.
The signal acquisition module of substation transformer long distance control system, also comprise the transient voltage twin zener dioder, described transient voltage twin zener dioder one end is connected on circuit between current transformer output terminal and the first operational amplifier in-phase input end, and its other end is connected on circuit between current transformer output terminal and the first operational amplifier inverting input.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.
For the ease of the resistance of the second resistance and the 3rd resistance is regulated, as preferably, described the second resistance and the 3rd resistance are adjustable resistance.
Compared with prior art, the utlity model has following beneficial effect: (1) the utility model comprises current transformer, the first operational amplifier, the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity, the utility model uses element few, cost is low, is convenient to realize, when the utility model is used, can obtain needed Voltage-output by the resistance of regulating the second resistance, debugging is convenient, so, is convenient to of the present utility model applying.
(2) the utility model comprises the first electric capacity and the 3rd resistance, and the first electric capacity and the 3rd resistance are used for compensating phase shift when the utility model is used, and can reach by the resistance of regulating the 3rd resistance required phase shift compensation precision.
(3) the utility model comprises the second electric capacity and the 3rd electric capacity, and when the utility model was used, the second electric capacity and the 3rd electric capacity were used for uncoupling and filtering, and then can improve the stability of collection signal outlet line output signal.
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, current transformer, 2, collection signal outlet line, R1, the first resistance, R2, the second resistance, R3, the 3rd resistance, C1, the first electric capacity, C2, the second electric capacity, C3, the 3rd 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 acquisition module of substation transformer long distance control system, comprise current transformer 1, the first operational amplifier A 1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3 and transient voltage twin zener dioder D1, wherein, an output terminal of current transformer 1 secondary is connected with the in-phase input end of the first operational amplifier A 1, and another output terminal of current transformer 1 secondary is connected with the inverting input of the first operational amplifier A 1.The first operational amplifier A 1 is connected with power supply VCC, and the first operational amplifier A 1 also is provided with earth terminal.The first capacitor C 1 is connected with the 3rd resistance R 3 and is consisted of the first series arm, the first series arm, the second resistance R 2 and the second capacitor C 2 threes are in parallel consists of the first parallel branches, and the first parallel branch two ends are connected with output terminal with the inverting input of the first operational amplifier A 1 respectively.The first resistance R 1 one ends are connected with the first operational amplifier A 1 output terminal, and its other end is connected with collection signal outlet line 2.The 3rd capacitor C 3 one ends are connected on circuit between the first operational amplifier A 1 output terminal and the first resistance R 1, its other end ground connection.
Transient voltage twin zener dioder D1 one end is connected on circuit between current transformer 1 output terminal and the first operational amplifier A 1 in-phase input end, and its other end is connected on circuit between current transformer 1 output terminal and the first operational amplifier A 1 inverting input.Regulate control when the present embodiment is used, in the present embodiment, the second resistance R 2 and the 3rd resistance R 3 all preferably adopt adjustable resistance.
When the present embodiment was used, the former limit of current transformer 1 was connected with substation transformer and is used for gathering current signal, can obtain needed Voltage-output by the resistance of regulating the second resistance R 2, and the signal after conversion is through 2 outputs of collection signal outlet line.
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 acquisition module of substation transformer long distance control system, it is characterized in that: comprise current transformer (1), the first operational amplifier (A1), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the first electric capacity (C1), the second electric capacity (C2) and the 3rd electric capacity (C3), two output terminals of described current transformer (1) are connected with inverting input with the in-phase input end of the first operational amplifier (A1) respectively, described the first electric capacity (C1) is connected with the 3rd resistance (R3) and is consisted of the first series arm, described the first series arm, the second resistance (R2) and the second electric capacity (C2) three formation in parallel the first parallel branch, described the first parallel branch two ends are connected with output terminal with the inverting input of the first operational amplifier (A1) respectively, described the first resistance (R1) end is connected with the first operational amplifier (A1) output terminal, and its other end is connected with collection signal outlet line (2), described the 3rd electric capacity (C3) end is connected on circuit between the first operational amplifier (A1) output terminal and the first resistance (R1), its other end ground connection.
2. the signal acquisition module of substation transformer long distance control system according to claim 1, it is characterized in that: described the first operational amplifier (A1) is connected with power supply (VCC).
3. the signal acquisition module 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 circuit between current transformer (1) output terminal and the first operational amplifier (A1) in-phase input end, and its other end is connected on circuit between current transformer (1) output terminal and the first operational amplifier (A1) inverting input.
4. the signal acquisition module of the described substation transformer long distance control system of any one according to claim 1～3, it is characterized in that: described the second resistance (R2) and the 3rd resistance (R3) are adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320343246 CN203275502U (en) | 2013-06-17 | 2013-06-17 | Signal acquisition module of remote monitoring system of distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320343246 CN203275502U (en) | 2013-06-17 | 2013-06-17 | Signal acquisition module of remote monitoring system of distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203275502U true CN203275502U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320343246 Expired - Fee Related CN203275502U (en) | 2013-06-17 | 2013-06-17 | Signal acquisition module of remote monitoring system of distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203275502U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336162A (en) * | 2013-06-17 | 2013-10-02 | 成都荣耀科技有限公司 | Signal collector for distribution transformer remote monitoring system |
| CN108414818A (en) * | 2018-03-30 | 2018-08-17 | 核工业理化工程研究院 | A kind of Acquisition Circuit and frequency converter for measuring high-frequency ac voltage |
-
2013
- 2013-06-17 CN CN 201320343246 patent/CN203275502U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336162A (en) * | 2013-06-17 | 2013-10-02 | 成都荣耀科技有限公司 | Signal collector for distribution transformer remote monitoring system |
| CN108414818A (en) * | 2018-03-30 | 2018-08-17 | 核工业理化工程研究院 | A kind of Acquisition Circuit and frequency converter for measuring high-frequency ac voltage |
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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 |