CN103336162A - Signal collector for distribution transformer remote monitoring system - Google Patents
Signal collector for distribution transformer remote monitoring system Download PDFInfo
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- CN103336162A CN103336162A CN2013102373308A CN201310237330A CN103336162A CN 103336162 A CN103336162 A CN 103336162A CN 2013102373308 A CN2013102373308 A CN 2013102373308A CN 201310237330 A CN201310237330 A CN 201310237330A CN 103336162 A CN103336162 A CN 103336162A
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Abstract
The invention discloses a signal collector for a distribution transformer remote monitoring system, which comprises a current transformer, a first operational amplifier, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor and a third capacitor, wherein the current transformer is connected with the non-inverting input end and the inverting input end of the first operational amplifier. A first series branch is formed by connecting the first capacitor and the third resistor in series, a first parallel branch is formed by connecting the first series branch, the second resistor and the second capacitor, the two ends of the first parallel branch is connected with the inverting input end and output end of the first operational amplifier. One end of the first resistor is connected with the output end of the first operational amplifier, the other end of the first resistor is connected with a signal collecting output line, and one end of the third capacitor is connected onto the line between the output end of the first operational amplifier and the first resistor. The signal collector provided by the invention uses fewer elements, is low in cost, and is convenient to adjust when the collected big current is converted into a small voltage signal, so as to be convenient to popularize and apply.
Description
Technical field
The present invention relates to the backup system of substation transformer, specifically is the signal picker 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 the power equipment of electric energy directly being distributed to 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 of gathering 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 big current signal, and the controller of monitor terminal generally can only be handled the small voltage signal in the supervisory system, and the big current signal that therefore needs sensor is collected changes into the small voltage signal.Designed circuit structure complexity when the supervisory system of existing substation transformer changes into small voltage with big electric current uses element more, the cost height, and it is loaded down with trivial details that big current signal is adjusted to the small voltage process of supervisory system middle controller demand.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of signal picker of substation transformer long distance control system is provided, it uses element few, and cost is low, is convenient to debugging, and then easy to utilize.
Purpose of the present invention is achieved through the following technical solutions: the signal picker of substation transformer long distance control system, comprise current transformer, first operational amplifier, first resistance, second resistance, the 3rd resistance, first electric capacity, 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 first operational amplifier respectively, described first electric capacity is connected with the 3rd resistance and is constituted first series arm, described first series arm, second resistance and second electric capacity three formation in parallel, first parallel branch, the described first parallel branch two ends are connected with output terminal with the inverting input of first operational amplifier respectively; Described first resistance, one end is connected with first operational amplifier output terminal, and its other end is connected with gathers the output line road; Described the 3rd electric capacity one end is connected on the circuit between first operational amplifier output terminal and first resistance, its other end ground connection.When the present invention used, current transformer carried out the current signal collection, gathered the signal output after the output line road is used for changing.
Described first operational amplifier is connected with power supply.
The signal picker of substation transformer long distance control system, comprise that also transient voltage suppresses diode, described transient voltage suppresses diode one end and is connected on the circuit between current transformer output terminal and the first operational amplifier in-phase input end, and its other end is connected on the circuit between current transformer output terminal and the first operational amplifier inverting input.Wherein, transient voltage suppresses the glitch that diode can suppress voltage or electric current, prevent the unexpected rising of voltage and current, when transient voltage inhibition diode stands high energy impact events, it can make its impedance reduce suddenly with high speed, absorb a big electric current simultaneously, 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 second resistance and the 3rd resistance is regulated, as preferably, described second resistance and the 3rd resistance are adjustable resistance.
Compared with prior art, the present invention has following beneficial effect: (1) the present invention includes current transformer, first operational amplifier, first resistance, second resistance, the 3rd resistance, first electric capacity, second electric capacity and the 3rd electric capacity, the present invention uses element few, cost is low, is convenient to realize, when the present invention uses, can obtain needed voltage output by the resistance of regulating second resistance, debugging is convenient, so, is convenient to of the present invention applying.
(2) the present invention includes first electric capacity and the 3rd resistance, first electric capacity and the 3rd resistance are used for compensating phase shift when the present invention uses, and can reach required phase shift compensation precision by the resistance of regulating the 3rd resistance.
(3) the present invention includes second electric capacity and the 3rd electric capacity, when the present invention used, second electric capacity and the 3rd electric capacity were used for uncoupling and filtering, and then can improve the stability of gathering output line road output signal.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
The corresponding name of Reference numeral is called in the accompanying drawing: 1, current transformer, 2, gather the output line road, R1, first resistance, R2, second resistance, R3, the 3rd resistance, C1, first electric capacity, C2, second electric capacity, C3, the 3rd electric capacity, D1, transient voltage suppress diode, A1, first operational amplifier, VCC, power supply.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the signal picker of substation transformer long distance control system, comprise that current transformer 1, first operational amplifier A 1, first resistance R 1, second resistance R 2, the 3rd resistance R 3, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3 and transient voltage suppress diode D1, wherein, an output terminal of current transformer 1 secondary is connected with the in-phase input end of first operational amplifier A 1, and another output terminal of current transformer 1 secondary is connected with the inverting input of first operational amplifier A 1.First operational amplifier A 1 is connected with power supply VCC, and first operational amplifier A 1 also is provided with earth terminal.First capacitor C 1 is connected with the 3rd resistance R 3 and is constituted first series arm, first series arm, second resistance R 2 and second capacitor C, 2 threes formation in parallel, first parallel branch, the first parallel branch two ends are connected with output terminal with the inverting input of first operational amplifier A 1 respectively.First resistance R, 1 one ends are connected with first operational amplifier A, 1 output terminal, and its other end is connected with gathers output line road 2.The 3rd capacitor C 3 one ends are connected on the circuit between first operational amplifier A, 1 output terminal and first resistance R 1, its other end ground connection.
Transient voltage suppresses diode D1 one end and is connected on the circuit between current transformer 1 output terminal and first operational amplifier A, 1 in-phase input end, and its other end is connected on the circuit between current transformer 1 output terminal and first operational amplifier A, 1 inverting input.Regulate control when present embodiment is used, second resistance R 2 and the 3rd resistance R 3 all preferably adopt adjustable resistance in the present embodiment.
When 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 second resistance R 2, and the signal after conversion is through gathering 2 outputs of output line road.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention does, can not assert that the specific embodiment of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, not breaking away from other embodiments that draw under the technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (4)
1. the signal picker of substation transformer long distance control system, it is characterized in that: comprise current transformer (1), first operational amplifier (A1), first resistance (R1), second resistance (R2), the 3rd resistance (R3), first electric capacity (C1), 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 first operational amplifier (A1) respectively, described first electric capacity (C1) is connected with the 3rd resistance (R3) and is constituted first series arm, described first series arm, second resistance (R2) and second electric capacity (C2) three formation in parallel, first parallel branch, the described first parallel branch two ends are connected with output terminal with the inverting input of first operational amplifier (A1) respectively; Described first resistance (R1) end is connected with first operational amplifier (A1) output terminal, and its other end is connected with gathers output line road (2); Described the 3rd electric capacity (C3) end is connected on the circuit between first operational amplifier (A1) output terminal and first resistance (R1), its other end ground connection.
2. the signal picker of substation transformer long distance control system according to claim 1, it is characterized in that: described first operational amplifier (A1) is connected with power supply (VCC).
3. the signal picker of substation transformer long distance control system according to claim 1, it is characterized in that: comprise that also transient voltage suppresses diode (D1), described transient voltage suppresses diode (D1) end and is connected on the circuit between current transformer (1) output terminal and first operational amplifier (A1) in-phase input end, and its other end is connected on the circuit between current transformer (1) output terminal and first operational amplifier (A1) inverting input.
4. according to the signal picker of any described substation transformer long distance control system in the claim 1～3, it is characterized in that: described second resistance (R2) and the 3rd resistance (R3) are adjustable resistance.
Priority Applications (1)
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| CN2013102373308A CN103336162A (en) | 2013-06-17 | 2013-06-17 | Signal collector for distribution transformer remote monitoring system |
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| CN2013102373308A CN103336162A (en) | 2013-06-17 | 2013-06-17 | Signal collector for distribution transformer remote monitoring system |
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| CN103336162A true CN103336162A (en) | 2013-10-02 |
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| CN2013102373308A Pending CN103336162A (en) | 2013-06-17 | 2013-06-17 | Signal collector for distribution transformer remote monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696207A (en) * | 2018-10-31 | 2019-04-30 | 兰州智交电子科技有限公司 | Tunnel radio intelligent monitoring and controlling device |
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| CN101051739A (en) * | 2007-04-13 | 2007-10-10 | 清华大学 | Digital current synthesizer |
| CN101551440A (en) * | 2009-05-15 | 2009-10-07 | 东北大学 | Generator transformer unit faults recorder analysis device |
| CN201378741Y (en) * | 2009-04-24 | 2010-01-06 | 王占武 | Reactive power compensation filtering controller |
| CN101771296A (en) * | 2010-02-05 | 2010-07-07 | 东北大学 | Method and device for power information detection and interconnection self-decision analysis |
| CN102215027A (en) * | 2010-04-12 | 2011-10-12 | 上海锐帕节能科技有限公司 | Cascade speed control device |
| CN102621367A (en) * | 2012-03-22 | 2012-08-01 | 上海市电力公司 | Pre-amplification circuit for MOA (metal oxide arrester) resistive current detecting system |
| CN203275502U (en) * | 2013-06-17 | 2013-11-06 | 成都荣耀科技有限公司 | Signal acquisition module of remote monitoring system of distribution transformer |
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2013
- 2013-06-17 CN CN2013102373308A patent/CN103336162A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051739A (en) * | 2007-04-13 | 2007-10-10 | 清华大学 | Digital current synthesizer |
| CN201378741Y (en) * | 2009-04-24 | 2010-01-06 | 王占武 | Reactive power compensation filtering controller |
| CN101551440A (en) * | 2009-05-15 | 2009-10-07 | 东北大学 | Generator transformer unit faults recorder analysis device |
| CN101771296A (en) * | 2010-02-05 | 2010-07-07 | 东北大学 | Method and device for power information detection and interconnection self-decision analysis |
| CN102215027A (en) * | 2010-04-12 | 2011-10-12 | 上海锐帕节能科技有限公司 | Cascade speed control device |
| CN102621367A (en) * | 2012-03-22 | 2012-08-01 | 上海市电力公司 | Pre-amplification circuit for MOA (metal oxide arrester) resistive current detecting system |
| CN203275502U (en) * | 2013-06-17 | 2013-11-06 | 成都荣耀科技有限公司 | Signal acquisition module of remote monitoring system of distribution transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696207A (en) * | 2018-10-31 | 2019-04-30 | 兰州智交电子科技有限公司 | Tunnel radio intelligent monitoring and controlling device |
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Application publication date: 20131002 |