CN202903862U - Power supply voltage detection circuit for reclosing device - Google Patents
Power supply voltage detection circuit for reclosing device Download PDFInfo
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- CN202903862U CN202903862U CN 201220603803 CN201220603803U CN202903862U CN 202903862 U CN202903862 U CN 202903862U CN 201220603803 CN201220603803 CN 201220603803 CN 201220603803 U CN201220603803 U CN 201220603803U CN 202903862 U CN202903862 U CN 202903862U
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Abstract
The utility model discloses a power supply voltage detection circuit for a reclosing device, which comprises a three-phase four-wire power supply circuit, a three-phase voltage sampling circuit and a voltage signal amplification circuit, wherein the three-phase four-wire power supply circuit is connected with an alternating current power supply for receiving three-phase voltage signals outputted by the alternating current power supply and outputting the signals to the three-phase voltage sampling circuit; the three-phase voltage sampling circuit is connected with the three-phase four-wire power supply circuit for carrying out sampling on the three-phase voltage signals via a voltage transformer and outputting the sampling result to the voltage signal amplification circuit; and the voltage signal amplification circuit is connected with the three-phase voltage sampling circuit for amplifying the three-phase voltage signals outputted by the three-phase voltage sampling circuit and outputting the signals to the single chip microcomputer of the reclosing device for processing. According to the power supply voltage detection circuit for the reclosing device, three phases of voltage outputted by the alternating current power supply can be detected at the same time, according to the detection, fluctuation of the voltage of the alternating current power supply can be judged, and reliability of the reclosing device is improved.
Description
Technical field
The utility model relates to a kind of voltage detection circuit, relates in particular to a kind of voltage detection circuit for reclosing device.
Background technology
It all is by realization that single live wire and zero line are sampled that traditional reclosing device detects for the fluctuation (comprising phase shortage) of supply voltage; this method exists larger unicity and temporal hysteresis quality; may therefore cause the misoperation of reclosing device or protection to lose efficacy, cause consumer to damage.
The utility model content
For above-mentioned technical matters, the purpose of this utility model is to provide a kind of voltage detection circuit for reclosing device, its three-phase voltage to AC power output detects simultaneously, and judges accordingly the undulatory property of AC supply voltage, has improved the reliability of reclosing device.
For reaching this purpose, the utility model by the following technical solutions:
A kind of voltage detection circuit for reclosing device, it comprises: three-phase and four-line feed circuit, three-phase voltage sample circuit and voltage signal amplifying circuit;
Described three-phase and four-line feed circuit are connected with AC power, are used for receiving the three-phase voltage signal of AC power output, and export to the three-phase voltage sample circuit;
Described three-phase voltage sample circuit is connected with the three-phase and four-line feed circuit, is used for by voltage transformer (VT) described three-phase voltage signal being sampled, and sampled result is exported to the voltage signal amplifying circuit;
Described voltage signal amplifying circuit is connected with the three-phase voltage sample circuit, is used for the three-phase voltage signal of three-phase voltage sample circuit output is amplified, and exports to the single-chip microcomputer processing of coincidence arrangement.
Especially, described three-phase and four-line feed circuit comprise resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and resistance R 6, and described three-phase voltage sample circuit comprises voltage transformer pt 1, resistance R 7, voltage transformer pt 2, resistance R 8, voltage transformer pt 3 and resistance R 9;
Wherein, the two ends of the primary coil of described voltage transformer pt 1 are resistance in series R1 and resistance R 2 respectively, the secondary coil of voltage transformer pt 1 and resistance R 7 rear ground connection in parallel, the two ends of the primary coil of described voltage transformer pt 2 are resistance in series R3 and resistance R 4 respectively, the end of the other end of resistance R 4 and node contact resistance R6 after resistance R 2 is connected, the secondary coil of voltage transformer pt 2 and resistance R 8 rear ground connection in parallel, the two ends of the primary coil of described voltage transformer pt 3 are resistance in series R5 and resistance R 6 respectively, the secondary coil of voltage transformer pt 3 and resistance R 9 rear ground connection in parallel.
Especially, described voltage signal amplifying circuit comprises: resistance R 10, resistance R 11, operational amplifier U1A, diode D1, capacitor C 1, capacitor C 2, resistance R 12, resistance R 13, operational amplifier U1B, diode D2, resistance R 14, resistance R 15, operational amplifier U1C and diode D3;
Wherein, one end of resistance R 10 is connected with an end of resistance R 7, the reverse input end of the other end and node concatenation operation amplifier U1A after an end of resistance R 11 is connected, the other end of resistance R 11 and the node after the end of diode D1 is connected connect the single-chip microcomputer of reclosing device, the other end of diode D1 is connected with the output terminal of operational amplifier U1A, the earth terminal ground connection of operational amplifier U1A, one end of the power end of operational amplifier U1A and capacitor C 1, node after one end of capacitor C 2 connects connects supply voltage output terminal, the node ground connection that the other end of capacitor C 1 is connected with the other end of capacitor C 2; One end of resistance R 12 is connected with an end of resistance R 8, the reverse input end of the other end and node concatenation operation amplifier U1B after an end of resistance R 13 is connected, the other end of resistance R 13 is connected with the end of diode D2, and the other end of diode D2 is connected with the output terminal of operational amplifier U1B; One end of resistance R 14 is connected with an end of resistance R 9, the reverse input end of the other end and node concatenation operation amplifier U1C after an end of resistance R 15 is connected, the other end of resistance R 15 is connected with the end of diode D3, and the other end of diode D3 is connected with the output terminal of operational amplifier U1C.
The utility model detects simultaneously to the three-phase voltage of AC power output, and judges accordingly the undulatory property of AC supply voltage, has improved the reliability of reclosing device.
Description of drawings
The voltage detection circuit structural drawing that is used for reclosing device that Fig. 1 provides for the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with drawings and Examples.
Please refer to shown in Figure 1, the voltage detection circuit structural drawing that is used for reclosing device that Fig. 1 provides for the utility model embodiment.
The voltage detection circuit that is used for reclosing device in the present embodiment comprises: three-phase and four-line feed circuit, three-phase voltage sample circuit and voltage signal amplifying circuit.
Described three-phase and four-line feed circuit are connected with AC power, are used for receiving the three-phase voltage signal of AC power output, and export to the three-phase voltage sample circuit.Described three-phase voltage sample circuit is connected with the three-phase and four-line feed circuit, is used for by voltage transformer (VT) described three-phase voltage signal being sampled, and sampled result is exported to the voltage signal amplifying circuit.
The three-phase and four-line feed circuit are connected to respectively three live wire UA, UB, UC and neutral line UN that the described AC power of consumer power supply is drawn.The three-phase and four-line feed circuit comprise resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and resistance R 6 in the present embodiment, and described three-phase voltage sample circuit comprises voltage transformer pt 1, resistance R 7, voltage transformer pt 2, resistance R 8, voltage transformer pt 3 and resistance R 9.Wherein, one end of described resistance R 2 connects live wire UA, the two ends of the primary coil of voltage transformer pt 1 are resistance in series R1 and resistance R 2 respectively, the secondary coil of voltage transformer pt 1 and resistance R 7 rear ground connection in parallel, one end of described resistance R 3 connects live wire UB, the two ends of the primary coil of voltage transformer pt 2 are resistance in series R3 and resistance R 4 respectively, connect neutral line UN behind the end of the other end of resistance R 4 and node contact resistance R6 after resistance R 2 is connected, the secondary coil of voltage transformer pt 2 and resistance R 8 rear ground connection in parallel, one end of described resistance R 5 connects live wire UC, the two ends of the primary coil of voltage transformer pt 3 are resistance in series R5 and resistance R 6 respectively, the secondary coil of voltage transformer pt 3 and resistance R 9 rear ground connection in parallel.The process that the three-phase voltage sample circuit obtains three-phase voltage signal is as follows: the electric current that the secondary coil of voltage transformer pt 1 induces forms voltage signal through resistance R 7, same, the electric current that the secondary coil of voltage transformer pt 2 induces forms voltage signal through resistance R 8, and the electric current that the secondary coil of voltage transformer pt 3 induces forms voltage signal through resistance R 9.
Described voltage signal amplifying circuit is connected with the three-phase voltage sample circuit, is used for the three-phase voltage signal of three-phase voltage sample circuit output is amplified, and exports to the single-chip microcomputer processing of coincidence arrangement.If it is normal that single-chip microcomputer is judged the voltage of AC power output, then single-chip microcomputer will be proceeded to detect to the voltage of this AC power; If single-chip microcomputer is judged the electric voltage exception of AC power output, then will send instruction to the protection topworks of described reclosing device by single-chip microcomputer, for consumer provides protection.
The amplifying circuit of voltage signal described in the present embodiment comprises: resistance R 10, resistance R 11, operational amplifier U1A, diode D1, capacitor C 1, capacitor C 2, resistance R 12, resistance R 13, operational amplifier U1B, diode D2, resistance R 14, resistance R 15, operational amplifier U1C and diode D3.Wherein, one end of resistance R 10 is connected with an end of resistance R 7, the reverse input end of the other end and node concatenation operation amplifier U1A after an end of resistance R 11 is connected, the other end of resistance R 11 and the node after the end of diode D1 is connected connect the single-chip microcomputer of reclosing device, the other end of diode D1 is connected with the output terminal of operational amplifier U1A, the earth terminal ground connection of operational amplifier U1A, one end of the power end of operational amplifier U1A and capacitor C 1, node after one end of capacitor C 2 connects connects supply voltage output terminal VCC, the node ground connection that the other end of capacitor C 1 is connected with the other end of capacitor C 2; One end of resistance R 12 is connected with an end of resistance R 8, the reverse input end of the other end and node concatenation operation amplifier U1B after an end of resistance R 13 is connected, the other end of resistance R 13 is connected with the end of diode D2, and the other end of diode D2 is connected with the output terminal of operational amplifier U1B; One end of resistance R 14 is connected with an end of resistance R 9, the reverse input end of the other end and node concatenation operation amplifier U1C after an end of resistance R 15 is connected, the other end of resistance R 15 is connected with the end of diode D3, and the other end of diode D3 is connected with the output terminal of operational amplifier U1C.
The technical solution of the utility model detects simultaneously to the three-phase voltage of AC power output, and judges accordingly the undulatory property of AC supply voltage, has improved the reliability of reclosing device.
Above-mentioned only is preferred embodiment of the present utility model and institute's application technology principle; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed in the protection domain of the present utility model.
Claims (3)
1. a voltage detection circuit that is used for reclosing device is characterized in that, comprising: three-phase and four-line feed circuit, three-phase voltage sample circuit and voltage signal amplifying circuit;
Described three-phase and four-line feed circuit are connected with AC power, are used for receiving the three-phase voltage signal of AC power output, and export to the three-phase voltage sample circuit;
Described three-phase voltage sample circuit is connected with the three-phase and four-line feed circuit, is used for by voltage transformer (VT) described three-phase voltage signal being sampled, and sampled result is exported to the voltage signal amplifying circuit;
Described voltage signal amplifying circuit is connected with the three-phase voltage sample circuit, is used for the three-phase voltage signal of three-phase voltage sample circuit output is amplified, and exports to the single-chip microcomputer processing of coincidence arrangement.
2. the voltage detection circuit for reclosing device according to claim 1, it is characterized in that, described three-phase and four-line feed circuit comprise resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and resistance R 6, and described three-phase voltage sample circuit comprises voltage transformer pt 1, resistance R 7, voltage transformer pt 2, resistance R 8, voltage transformer pt 3 and resistance R 9;
Wherein, the two ends of the primary coil of described voltage transformer pt 1 are resistance in series R1 and resistance R 2 respectively, the secondary coil of voltage transformer pt 1 and resistance R 7 rear ground connection in parallel, the two ends of the primary coil of described voltage transformer pt 2 are resistance in series R3 and resistance R 4 respectively, the end of the other end of resistance R 4 and node contact resistance R6 after resistance R 2 is connected, the secondary coil of voltage transformer pt 2 and resistance R 8 rear ground connection in parallel, the two ends of the primary coil of described voltage transformer pt 3 are resistance in series R5 and resistance R 6 respectively, the secondary coil of voltage transformer pt 3 and resistance R 9 rear ground connection in parallel.
3. the voltage detection circuit for reclosing device according to claim 2, it is characterized in that described voltage signal amplifying circuit comprises: resistance R 10, resistance R 11, operational amplifier U1A, diode D1, capacitor C 1, capacitor C 2, resistance R 12, resistance R 13, operational amplifier U1B, diode D2, resistance R 14, resistance R 15, operational amplifier U1C and diode D3;
Wherein, one end of resistance R 10 is connected with an end of resistance R 7, the reverse input end of the other end and node concatenation operation amplifier U1A after an end of resistance R 11 is connected, the other end of resistance R 11 and the node after the end of diode D1 is connected connect the single-chip microcomputer of reclosing device, the other end of diode D1 is connected with the output terminal of operational amplifier U1A, the earth terminal ground connection of operational amplifier U1A, one end of the power end of operational amplifier U1A and capacitor C 1, node after one end of capacitor C 2 connects connects supply voltage output terminal, the node ground connection that the other end of capacitor C 1 is connected with the other end of capacitor C 2; One end of resistance R 12 is connected with an end of resistance R 8, the reverse input end of the other end and node concatenation operation amplifier U1B after an end of resistance R 13 is connected, the other end of resistance R 13 is connected with the end of diode D2, and the other end of diode D2 is connected with the output terminal of operational amplifier U1B; One end of resistance R 14 is connected with an end of resistance R 9, the reverse input end of the other end and node concatenation operation amplifier U1C after an end of resistance R 15 is connected, the other end of resistance R 15 is connected with the end of diode D3, and the other end of diode D3 is connected with the output terminal of operational amplifier U1C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220603803 CN202903862U (en) | 2012-11-15 | 2012-11-15 | Power supply voltage detection circuit for reclosing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220603803 CN202903862U (en) | 2012-11-15 | 2012-11-15 | Power supply voltage detection circuit for reclosing device |
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| Publication Number | Publication Date |
|---|---|
| CN202903862U true CN202903862U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220603803 Expired - Fee Related CN202903862U (en) | 2012-11-15 | 2012-11-15 | Power supply voltage detection circuit for reclosing device |
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| CN (1) | CN202903862U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459283A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Electricity-sensing voice prompt high-voltage ground wire device for 10 KV discharging and use method thereof |
| CN104655909A (en) * | 2015-03-16 | 2015-05-27 | 福建农林大学 | Circuit with symmetrical component method calculation function |
-
2012
- 2012-11-15 CN CN 201220603803 patent/CN202903862U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459283A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Electricity-sensing voice prompt high-voltage ground wire device for 10 KV discharging and use method thereof |
| CN104655909A (en) * | 2015-03-16 | 2015-05-27 | 福建农林大学 | Circuit with symmetrical component method calculation function |
| CN104655909B (en) * | 2015-03-16 | 2017-12-08 | 福建农林大学 | A kind of circuit with symmetrical component method computing function |
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| 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: 20130424 Termination date: 20151115 |
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| EXPY | Termination of patent right or utility model |