CN101183130A - Busch lemniscate yarn cutting testing apparatus and control method - Google Patents
Busch lemniscate yarn cutting testing apparatus and control method Download PDFInfo
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- CN101183130A CN101183130A CNA2007101504566A CN200710150456A CN101183130A CN 101183130 A CN101183130 A CN 101183130A CN A2007101504566 A CNA2007101504566 A CN A2007101504566A CN 200710150456 A CN200710150456 A CN 200710150456A CN 101183130 A CN101183130 A CN 101183130A
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Abstract
The present invention relates to a break detection apparatus and a control method for a neutral line. The present invention comprises two voltage sensors, which are respectively connected with an inlet-outlet line power supply. The signal of the inlet-outlet line power supply is respectively inputted into a signal processing circuit through the voltage sensor. The two signals are processed by the signal processing circuit and exported to the two input ports of a microcontroller. Through the processing of the internal program of the microcontroller, the signal during fault is respectively inputted in a buzzer sound alarm circuit, a light emitting diode light emitting flicker circuit and a relay node closure control circuit from a third output port, a fourth output port and a fifth output port, so the closure of one group of nodes is controlled. In a three-phase four-wire low voltage power supply system, when a N line lose power supply neutral point is separated with a load neutral line and in a line with relatively big load imbalance degree, when the load voltage drop with small load is risen too much, the present invention can emit alarm signal in time to clear fault. The danger that the service life of a distribution plant is shortened even the distribution plant is burned down is avoided. Various electricity consumer equipments are protected and the loss of state property is avoided.
Description
Technical field
The invention belongs to a kind of low-voltage electrical apparatus, particularly relate to a kind of broken neutral line pick-up unit and control method.
Background technology
Three-phase and four-line is a kind of typical power distribution system pattern of low-tension supply electric power system, and it comprises A, B, four lines of C, N, and mains side N line is connected with the earth, and A, B, the relative N line of C three-phase have the voltage of 220V, differ 120 ° of electrical angles on spatial disposition.This power supply is powered to threephase load, and the three-phase current vector and the N line of flowing through are got back to the transformer frequency response neutral point.When the three-phase equally loaded, three-phase current vector and be 0; But the current phasor that out of balance load produces and get back to the transformer frequency response neutral point through the N line, so that the deviser generally makes sectional area with the N line is relatively large, the lead with certain load-bearing capacity.Because N line current potential is 0, conductive material adopts the singularity of precious metal, makes some personages that make profit as one's only aim covet.Behind the N line dropout, the power supply neutral point separates with the load neutral line, and in the bigger circuit of load inequality extent, the load voltage falling-rising height of loading little is excessive, and controller switching equipment can shorten the life-span greatly even the danger of burning is arranged; And the N line dropout, neutral point drifting can produce error to the metering of electric energy meter, makes national wealth, the quality of power supply meet with heavy losses.
Summary of the invention
The present invention provides a kind of when the broken neutral line for solving the technical matters that exists in the known technology, can in time send the broken neutral line pick-up unit and the control method of alerting signal.
The technical scheme about the broken neutral line pick-up unit that the present invention takes for the technical matters that exists in the solution known technology is: it includes two voltage sensors that insert turnover line power supply respectively, but being input to respectively behind overvoltage sensor, turnover line power source voltage signal input/output signal can be isolated and the signal processing circuit of forming respectively by two operational amplifiers of bucking-out system zero drift error, two signals after signal processing circuit is handled, be input to two input ports of single-chip microcomputer more respectively, signal when single-chip microcomputer will have fault is input to hummer pronunciation warning circuit from the 3rd output port respectively, by the 4th output port sending and receiving optical diode light-emitting flash circuit, the 5th output port is succeeded the closed control circuit of electrical equipment node, pilot relay one group node closure.
The present invention for the technical scheme about the control method of broken neutral line pick-up unit that solves that the technical matters that exists in the known technology takes is: the control flow of single-chip microcomputer is as follows:
(1) after the beginning, carries out system initialization;
(2) to turnover line power signal sampling by the signal processing unit input;
(3) sampled signal is protected calculating;
(4) relatively judge further according to result of calculation whether two parts power supply is unusual, if unusually then respectively pronounce to report to the police, luminous warning and make relay node closure;
(5) if two parts power supply is not unusual, then returned for (2) step.
Advantage and good effect that the present invention has are: in the distribution system pattern of three-phase and four-line low-tension supply electric power system, behind the N line dropout, the power supply neutral point separates with the load neutral line, in the bigger circuit of load inequality extent, when the load voltage falling-rising height of loading little is excessive, owing to can in time send alerting signal, and excision fault.Thereby protected equipment to avoid their to shorten life-span even the danger of burning has been arranged; Also avoided national wealth, the quality of power supply to meet with heavy losses.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is a control flow chart of the present invention.
Embodiment
For further understanding content of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
As shown in Figure 1, incoming power A1, B1, C1, N1 and outlet power supply A2, B2, C2, N2 are respectively through overvoltage sensor 1 and voltage sensor 2, entering signal processing unit.We adopt the signal processing unit of two TL061 operational amplifier T1, T1 compositions for this part, will import with output signal and isolate, and suppress the influence of undesired signal, the error that its energy bucking-out system zero point drift simultaneously produces.Signal after the processing enters I/O1, the I/O2 mouth of single-chip microcomputer respectively, compares two parts power supply by single-chip microcomputer, controls hummer U1 pronunciation warning by the I/O3 mouth by optocoupler U2 when unusual; Report to the police by I/O4 mouth control light emitting diode D1 light-emitting flash; Make relay K 1 one group node closures by optocoupler U3 pilot relay K1 coil to electricity by the I/O5 mouth.
As shown in Figure 2, single-chip microcomputer internal control program is: Single Chip Microcomputer (SCM) program begins the first initialization in back; After this gather turnover line power supply signal by I/O1, the input of I/O2 mouth; Protect calculating and compare, judge whether unusually by the turnover line power supply signal of I/O1, the input of I/O2 mouth; If find that turnover line power supply signal is unusual, then control the signal that hummer U1 pronunciation is reported to the police by the output of I/O3 mouth respectively; Signal by the warning of I/O4 mouth output control light emitting diode D1 light-emitting flash; Make a group node closure of relay K 1 to electricity by the coil of I/O5 mouth output signal pilot relay K1.
Claims (2)
1. broken neutral line pick-up unit, it is characterized in that: it includes two voltage sensors that insert turnover line power supply respectively, but being input to respectively behind overvoltage sensor, turnover line power source voltage signal input/output signal can be isolated and the signal processing circuit of forming respectively by two operational amplifiers of bucking-out system zero drift error, two signals after signal processing circuit is handled, be input to two input ports of single-chip microcomputer more respectively, signal when single-chip microcomputer will have fault is input to hummer pronunciation warning circuit from the 3rd output port respectively, by the 4th output port sending and receiving optical diode light-emitting flash circuit, the 5th output port is succeeded electric apparatus coil, pilot relay one group node closure.
2. the control method of a broken neutral line pick-up unit, it is characterized in that: the control flow of single-chip microcomputer is as follows:
(1) after the beginning, carries out system initialization;
(2) to turnover line power signal sampling by the signal processing unit input;
(3) sampled signal is protected calculating;
(4) relatively judge further according to result of calculation whether two parts power supply is unusual, if unusually then respectively pronounce to report to the police, luminous warning and make relay node closure;
(5) if two parts power supply is not unusual, then returned for (2) step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101504566A CN101183130B (en) | 2007-11-27 | 2007-11-27 | Control method of Busch lemniscate yarn cutting testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101504566A CN101183130B (en) | 2007-11-27 | 2007-11-27 | Control method of Busch lemniscate yarn cutting testing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101183130A true CN101183130A (en) | 2008-05-21 |
| CN101183130B CN101183130B (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101504566A Expired - Fee Related CN101183130B (en) | 2007-11-27 | 2007-11-27 | Control method of Busch lemniscate yarn cutting testing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101183130B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495329A (en) * | 2011-11-14 | 2012-06-13 | 中国科学院等离子体物理研究所 | Automatic testing device of make-and-break of superconducting coil quench protection signal transmission line in fusion device |
| CN102866319A (en) * | 2012-09-27 | 2013-01-09 | 重庆华渝电气仪表总厂 | Fault diagnosis circuit based on AD convertor of single chip microcomputer |
-
2007
- 2007-11-27 CN CN2007101504566A patent/CN101183130B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495329A (en) * | 2011-11-14 | 2012-06-13 | 中国科学院等离子体物理研究所 | Automatic testing device of make-and-break of superconducting coil quench protection signal transmission line in fusion device |
| CN102866319A (en) * | 2012-09-27 | 2013-01-09 | 重庆华渝电气仪表总厂 | Fault diagnosis circuit based on AD convertor of single chip microcomputer |
| CN102866319B (en) * | 2012-09-27 | 2015-11-18 | 重庆华渝电气仪表总厂 | Based on the fault diagnosis circuit of Chip Microcomputer A/D converter |
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| Publication number | Publication date |
|---|---|
| CN101183130B (en) | 2010-08-11 |
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Granted publication date: 20100811 Termination date: 20161127 |