CN103368525A - Signal conditioning module of distribution transformer remote monitoring system - Google Patents
Signal conditioning module of distribution transformer remote monitoring system Download PDFInfo
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- CN103368525A CN103368525A CN2013102373242A CN201310237324A CN103368525A CN 103368525 A CN103368525 A CN 103368525A CN 2013102373242 A CN2013102373242 A CN 2013102373242A CN 201310237324 A CN201310237324 A CN 201310237324A CN 103368525 A CN103368525 A CN 103368525A
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Abstract
The invention discloses a signal conditioning module of a distribution transformer remote monitoring system, which comprises a first resistor, a second resistor, a first capacitor, a second capacitor and a following amplifying circuit, wherein two ends of the second resistor are connected with the first resistor and the input end of the following amplifying circuit; the other end, opposite to the end connected with the second resistor, of the first resistor is connected with a collecting signal input line; the output end of the following amplifying circuit is connected with a conditioning signal output line; one end of the first capacitor is connected to the line between the first and second resistors while the other end is grounded; and one end of the second capacitor is connected to the line between the second resistor and the following amplifying circuit while the other end is grounded. The signal conditioning module of the distribution transformer remote monitoring system, adopting the system, is simple in whole structure, fewer in used parts, low in cost and easy to realize. The signal conditioning module can filter high-frequency signals in collected signals, can prevent the signals from frequency spectrum mixing and high-frequency interference, and ensures that a controller of the monitoring system can perform right judging.
Description
Technical field
The present invention relates to the auxiliary system of distribution transformer, specifically the signal condition module of distribution 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 power system and the requirement of stability, distribution transformer is as the core link of electric power 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 distribution transformer is most important to electric power system.For distribution transformer is monitored, existing distribution power transformation device generally is equipped with supervisory control system, and supervisory control system is usually come analyzing and processing by the voltage signal that gathers distribution transformer, and then realizes the remote monitoring to distribution power transformation device.Be accompanied by high-frequency signal in the signal that existing supervisory control system collects, be prone to spectral aliasing and High-frequency Interference, and then the controller that can affect distribution power transformation device supervisory control system is made correct control.
Summary of the invention
The object of the invention 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 condition module of the distribution transformer long distance control system of spectral aliasing and High-frequency Interference.
Purpose of the present invention is achieved through the following technical solutions: the signal condition module of distribution 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 of following amplifying circuit is connected with the conditioned signal output line, described the first electric capacity one end is connected on the 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 the circuit between the input amplifier its other end ground connection.When the present invention used, the voltage signal that collects from the output of conditioned signal output line, wherein, was followed amplifying circuit and is had the high impedance matching properties after the present invention processes through collection signal input line input, can reduce signal and carry out the loss of postorder when processing.
The signal condition module of distribution 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 element 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.
The first operational amplifier of the present invention both can adopt common source with other element in the supervisory control system, also can adopt independent current source, and for the ease of independent control power supply, as preferably, described the first operational amplifier is connected with power supply.
Compared with prior art, the present invention has following beneficial effect: the present invention includes the first resistance, the second resistance, the first electric capacity, the second electric capacity and follow amplifying circuit, the present invention uses element few, be convenient to realize, cost is low, the first resistance and the first electric capacity consist of elementary low-pass filter circuit among the present invention, 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 control system is made correct control.
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, 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
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 to this.
Embodiment
As shown in Figure 1, the signal condition module of distribution 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, 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 that the first resistance R 1 relative other end that connects the second resistance R 2 ends 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 the 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 the 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 the 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 behind 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, after processing, the first operational amplifier A 1 exports from conditioned signal output line 2 again.
Above content is in conjunction with the further description of concrete preferred implementation to the present invention's work, 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 execution modes 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 condition module of distribution 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 of following amplifying circuit is connected with conditioned signal output line (2), described the first electric capacity (C1) end is connected on the 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 the circuit between the input amplifier its other end ground connection.
2. the signal condition module of distribution 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 the collection signal input line (1), its other end ground connection.
3. the signal condition module of distribution 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.
4. the signal condition module of distribution 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 |
|---|---|---|---|
| CN2013102373242A CN103368525A (en) | 2013-06-17 | 2013-06-17 | Signal conditioning module of distribution transformer remote monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102373242A CN103368525A (en) | 2013-06-17 | 2013-06-17 | Signal conditioning module of distribution transformer remote monitoring system |
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| CN103368525A true CN103368525A (en) | 2013-10-23 |
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| CN2013102373242A Pending CN103368525A (en) | 2013-06-17 | 2013-06-17 | Signal conditioning module of distribution transformer remote monitoring system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2864697Y (en) * | 2005-12-30 | 2007-01-31 | 保定天威集团有限公司 | Voltage isolation sampling device |
| CN102215027A (en) * | 2010-04-12 | 2011-10-12 | 上海锐帕节能科技有限公司 | Cascade speed control device |
| CN102647151A (en) * | 2012-04-24 | 2012-08-22 | 上海电力学院 | Cascade speed regulating device for current zero-crossing speed measurement for hardware detection |
| CN203275917U (en) * | 2013-06-17 | 2013-11-06 | 成都荣耀科技有限公司 | Signal conditioner of distribution transformer remote monitoring system |
-
2013
- 2013-06-17 CN CN2013102373242A patent/CN103368525A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2864697Y (en) * | 2005-12-30 | 2007-01-31 | 保定天威集团有限公司 | Voltage isolation sampling device |
| CN102215027A (en) * | 2010-04-12 | 2011-10-12 | 上海锐帕节能科技有限公司 | Cascade speed control device |
| CN102647151A (en) * | 2012-04-24 | 2012-08-22 | 上海电力学院 | Cascade speed regulating device for current zero-crossing speed measurement for hardware detection |
| CN203275917U (en) * | 2013-06-17 | 2013-11-06 | 成都荣耀科技有限公司 | Signal conditioner of distribution transformer remote monitoring system |
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Application publication date: 20131023 |