CN204989283U - Inductive current sampling and dc component detection circuitry among SVG - Google Patents
Inductive current sampling and dc component detection circuitry among SVG Download PDFInfo
- Publication number
- CN204989283U CN204989283U CN201520357186.6U CN201520357186U CN204989283U CN 204989283 U CN204989283 U CN 204989283U CN 201520357186 U CN201520357186 U CN 201520357186U CN 204989283 U CN204989283 U CN 204989283U
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- resistance
- svg
- ua6b
- output terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses an inductive current sampling and dc component detection circuitry among SVG, be TL074IDRSM's operational amplifier UA6B, UA6A, UA6C, UA6D including the model, constitute differential amplifier circuit respectively by operational amplifier UA6B, UA6C, UA6D, constitute second order low pass filter by operational amplifier UA6A. The utility model discloses circuit structure is succinct, easily realizes, can realize hardware test and protection to inductive current DC bias among the SVG, can satisfy inductive current sampling requirement among the SVG. (B /)
Description
Technical field
The utility model relates to SVG field, specifically inductive current sampling and DC component detection circuit in a kind of SVG.
Background technology
Static Var Compensator SVG is widely used in during the load compensation of modern power systems and transmission line of electricity compensate, needing to sample to inductive current in SVG, generally adopts corresponding current detection circuit.But in SVG, current detection circuit only can detect inductive current in prior art, cannot detect inductive current direct current biasing.
utility model contentthe purpose of this utility model is to provide inductive current sampling and DC component detection circuit in a kind of SVG, to solve prior art Problems existing.
In order to achieve the above object, the technical scheme that the utility model adopts is:
Inductive current sampling and DC component detection circuit in SVG, it is characterized in that: comprise the operational amplifier UA6B that model is TL074IDRSM, UA6A, UA6C, UA6D, wherein the in-phase input end of operational amplifier UA6B accesses the current transformer of inductance measuring electric current in SVG by resistance RA103, the in-phase input end of operational amplifier UA6B is also by resistance RA104 parallel with one another, electric capacity CA47 ground connection, the inverting input of operational amplifier UA6B is by resistance RA105, resistance RA101 and RA102 connected with resistance RA105 more parallel with one another accesses the current transformer of inductance measuring electric current in SVG, and draw wired earth between resistance RA105 and resistance RA101 and RA102 parallel with one another, the inverting input of operational amplifier UA6B is also by resistance RA106 parallel with one another, electric capacity CA48 is connected with the output terminal of self, the output terminal of operational amplifier UA6B is connected with the in-phase input end of operational amplifier UA6A by resistance RA107, and the output terminal of operational amplifier UA6B also connects to the controller in contrary diode access SVG respectively by two, operational amplifier UA6A just, negative power end connects+12V respectively,-12V voltage, the in-phase input end of operational amplifier UA6A is also by resistance RA108 parallel with one another, electric capacity CA49 accesses 1.5 bias voltages, the reverse input end of operational amplifier UA6A is by resistance RA109 ground connection, the reverse input end of operational amplifier UA6A is also by resistance RA110 parallel with one another, electric capacity CA50 is connected with the output terminal of self, the output terminal of operational amplifier UA6A accesses the controller in SVG by resistance RA111, the resistance RA113 of in-phase input end by connecting successively of operational amplifier UA6C, RA112 is connected with the output terminal of operational amplifier UA6B, the in-phase input end of operational amplifier UA6C is also by electric capacity CA52 ground connection, the inverting input of operational amplifier UA6C accesses between resistance RA113 and resistance RA112 by electric capacity CA51, the inverting input of operational amplifier UA6C is also connected with self output terminal, the output terminal of operational amplifier UA6C is connected with the in-phase input end of operational amplifier UA6D by resistance RA114, the in-phase input end of operational amplifier UA6D is also by resistance RA115 parallel with one another, electric capacity CA53 accesses 1.5V bias voltage, the inverting input of operational amplifier UA6D is by resistance RA116 ground connection, the inverting input of operational amplifier UA6D is also by resistance RA117 parallel with one another, electric capacity CA54 is connected with self output terminal, the output terminal of operational amplifier UA6D is respectively by resistance RA118, resistance RA119 accesses the controller in SVG.
In described SVG, inductive current sampling and DC component detection circuit, is characterized in that: form differential amplifier circuit respectively by operational amplifier UA6B, UA6C, UA6D, form second-order low-pass filter by operational amplifier UA6A.
The inductive current that current transformer detects, first through differential amplifier circuit, on the one hand increases through difference channel the controller sent into respectively after 1.5V is biased in SVG; On the other hand, first through second-order low-pass filter filtering, then after difference channel, send into the controller in SVG respectively, for hardware detection and the protection of inductive current direct current biasing.
The utility model circuit structure is succinct, is easy to realize, and can realize the hardware detection to inductive current direct current biasing in SVG and protection, can meet inductive current sampling request in SVG.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
As shown in Figure 1, inductive current sampling and DC component detection circuit in SVG, comprise the operational amplifier UA6B that model is TL074IDRSM, UA6A, UA6C, UA6D, wherein the in-phase input end of operational amplifier UA6B accesses the current transformer of inductance measuring electric current in SVG by resistance RA103, the in-phase input end of operational amplifier UA6B is also by resistance RA104 parallel with one another, electric capacity CA47 ground connection, the inverting input of operational amplifier UA6B is by resistance RA105, resistance RA101 and RA102 connected with resistance RA105 more parallel with one another accesses the current transformer of inductance measuring electric current in SVG, and draw wired earth between resistance RA105 and resistance RA101 and RA102 parallel with one another, the inverting input of operational amplifier UA6B is also by resistance RA106 parallel with one another, electric capacity CA48 is connected with the output terminal of self, the output terminal of operational amplifier UA6B is connected with the in-phase input end of operational amplifier UA6A by resistance RA107, and the output terminal of operational amplifier UA6B also connects to the controller in contrary diode access SVG respectively by two, operational amplifier UA6A just, negative power end connects+12V respectively,-12V voltage, the in-phase input end of operational amplifier UA6A is also by resistance RA108 parallel with one another, electric capacity CA49 accesses 1.5 bias voltages, the reverse input end of operational amplifier UA6A is by resistance RA109 ground connection, the reverse input end of operational amplifier UA6A is also by resistance RA110 parallel with one another, electric capacity CA50 is connected with the output terminal of self, the output terminal of operational amplifier UA6A accesses the controller in SVG by resistance RA111, the resistance RA113 of in-phase input end by connecting successively of operational amplifier UA6C, RA112 is connected with the output terminal of operational amplifier UA6B, the in-phase input end of operational amplifier UA6C is also by electric capacity CA52 ground connection, the inverting input of operational amplifier UA6C accesses between resistance RA113 and resistance RA112 by electric capacity CA51, the inverting input of operational amplifier UA6C is also connected with self output terminal, the output terminal of operational amplifier UA6C is connected with the in-phase input end of operational amplifier UA6D by resistance RA114, the in-phase input end of operational amplifier UA6D is also by resistance RA115 parallel with one another, electric capacity CA53 accesses 1.5V bias voltage, the inverting input of operational amplifier UA6D is by resistance RA116 ground connection, the inverting input of operational amplifier UA6D is also by resistance RA117 parallel with one another, electric capacity CA54 is connected with self output terminal, the output terminal of operational amplifier UA6D is respectively by resistance RA118, resistance RA119 accesses the controller in SVG.Form differential amplifier circuit respectively by operational amplifier UA6B, UA6C, UA6D, form second-order low-pass filter by operational amplifier UA6A.
Claims (2)
- Inductive current sampling and DC component detection circuit in 1.SVG, it is characterized in that: comprise the operational amplifier UA6B that model is TL074IDRSM, UA6A, UA6C, UA6D, wherein the in-phase input end of operational amplifier UA6B accesses the current transformer of inductance measuring electric current in SVG by resistance RA103, the in-phase input end of operational amplifier UA6B is also by resistance RA104 parallel with one another, electric capacity CA47 ground connection, the inverting input of operational amplifier UA6B is by resistance RA105, resistance RA101 and RA102 connected with resistance RA105 more parallel with one another accesses the current transformer of inductance measuring electric current in SVG, and draw wired earth between resistance RA105 and resistance RA101 and RA102 parallel with one another, the inverting input of operational amplifier UA6B is also by resistance RA106 parallel with one another, electric capacity CA48 is connected with the output terminal of self, the output terminal of operational amplifier UA6B is connected with the in-phase input end of operational amplifier UA6A by resistance RA107, and the output terminal of operational amplifier UA6B also connects to the controller in contrary diode access SVG respectively by two, operational amplifier UA6A just, negative power end connects+12V respectively,-12V voltage, the in-phase input end of operational amplifier UA6A is also by resistance RA108 parallel with one another, electric capacity CA49 accesses 1.5 bias voltages, the reverse input end of operational amplifier UA6A is by resistance RA109 ground connection, the reverse input end of operational amplifier UA6A is also by resistance RA110 parallel with one another, electric capacity CA50 is connected with the output terminal of self, the output terminal of operational amplifier UA6A accesses the controller in SVG by resistance RA111, the resistance RA113 of in-phase input end by connecting successively of operational amplifier UA6C, RA112 is connected with the output terminal of operational amplifier UA6B, the in-phase input end of operational amplifier UA6C is also by electric capacity CA52 ground connection, the inverting input of operational amplifier UA6C accesses between resistance RA113 and resistance RA112 by electric capacity CA51, the inverting input of operational amplifier UA6C is also connected with self output terminal, the output terminal of operational amplifier UA6C is connected with the in-phase input end of operational amplifier UA6D by resistance RA114, the in-phase input end of operational amplifier UA6D is also by resistance RA115 parallel with one another, electric capacity CA53 accesses 1.5V bias voltage, the inverting input of operational amplifier UA6D is by resistance RA116 ground connection, the inverting input of operational amplifier UA6D is also by resistance RA117 parallel with one another, electric capacity CA54 is connected with self output terminal, the output terminal of operational amplifier UA6D is respectively by resistance RA118, resistance RA119 accesses the controller in SVG.
- 2. inductive current sampling and DC component detection circuit in SVG according to claim 1, is characterized in that: form differential amplifier circuit respectively by operational amplifier UA6B, UA6C, UA6D, form second-order low-pass filter by operational amplifier UA6A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520357186.6U CN204989283U (en) | 2015-05-28 | 2015-05-28 | Inductive current sampling and dc component detection circuitry among SVG |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520357186.6U CN204989283U (en) | 2015-05-28 | 2015-05-28 | Inductive current sampling and dc component detection circuitry among SVG |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204989283U true CN204989283U (en) | 2016-01-20 |
Family
ID=55123640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520357186.6U Expired - Fee Related CN204989283U (en) | 2015-05-28 | 2015-05-28 | Inductive current sampling and dc component detection circuitry among SVG |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204989283U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444792A (en) * | 2018-11-14 | 2019-03-08 | 苏州绿控传动科技股份有限公司 | A kind of circuit reducing current sensor sampling error |
-
2015
- 2015-05-28 CN CN201520357186.6U patent/CN204989283U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444792A (en) * | 2018-11-14 | 2019-03-08 | 苏州绿控传动科技股份有限公司 | A kind of circuit reducing current sensor sampling error |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204188702U (en) | A kind of current detection circuit | |
| CN102854366B (en) | Low current measuring device and low current measuring method in direct-current power distribution and consumption system | |
| CN203720278U (en) | Vehicle microphone status detecting circuit | |
| CN202583298U (en) | Alternating current voltage isolated sampling circuit | |
| CN203800802U (en) | Large current detection circuit and power source circuit | |
| CN203287421U (en) | Measurement circuit for three-phase AC voltage and current | |
| CN204989283U (en) | Inductive current sampling and dc component detection circuitry among SVG | |
| CN204009646U (en) | A kind of regulated power supply continuous current controller | |
| CN203933382U (en) | A kind of APFC of tape jam measuring ability | |
| CN202631606U (en) | Current detection apparatus | |
| CN202168038U (en) | Difference operational amplifying circuit | |
| CN204832308U (en) | Grid voltage sampling and zero cross detection circuit among SVG | |
| CN204086386U (en) | A kind of electric automobile direct-current high-voltage sensor | |
| CN203455403U (en) | Battery voltage detection circuit based on Zener diode | |
| CN102722202A (en) | Voltage-current conversion circuit | |
| CN204575721U (en) | DC component detection circuit | |
| CN204794004U (en) | Inductive current current foldback circuit among SVG | |
| CN202404472U (en) | Multichannel parallel constant-current control circuit | |
| CN206673849U (en) | The high-performance electric source module that nuclear power station reactor core Nuclear measurement system uses | |
| CN204028203U (en) | A kind of anode current sampling circuit | |
| CN203178344U (en) | Direct current voltage signal acquisition circuit | |
| CN203504144U (en) | Electric leakage sampling circuit | |
| CN203490275U (en) | Double-subtraction alternating current sampling circuit of integrated power supply | |
| CN204065374U (en) | Novel inverter detection filter unit | |
| CN204556716U (en) | A kind of heavy current electrokinetic cell high precision collecting system |
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: 20160120 Termination date: 20200528 |