CN102455396A - Three-phase alternating current open-phase and reverse phase detection method - Google Patents
Three-phase alternating current open-phase and reverse phase detection method Download PDFInfo
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- CN102455396A CN102455396A CN2011101183542A CN201110118354A CN102455396A CN 102455396 A CN102455396 A CN 102455396A CN 2011101183542 A CN2011101183542 A CN 2011101183542A CN 201110118354 A CN201110118354 A CN 201110118354A CN 102455396 A CN102455396 A CN 102455396A
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Abstract
The invention discloses a three-phase alternating current open-phase and reverse phase detection method as follows: open-phase determination: by utilizing three interruption sources INT0, INT1 and T0 of a one-chip microcomputer, generating interruption at a falling edge of a pulse square wave, when an A phase if interrupted, clearing a counter Tab, when a B phase is interrupted, taking out a value Tab of the counter, clearing Tbc, when a C phase is interrupted, taking out a value Tbc of the counter, clearing Tca, when the A phase is interrupted again, taking out a value Tca of the counter, clearing the counter Tab again, and so on; if a phase is not interrupted, directly determining open-phase of the phase; when a power supply is in external connection with a device, if the Tab is approximately equal to the Tbc and the Tbc is approximately equal to the Tca (the Tab, the Tbc and the Tca are not zero), determining that three-phase alternating current is normal, otherwise the three-phase alternating current is open-phase; phase sequence determination: according to a time between two interruptions of a single phase, obtaining a period T, in a normal condition, if the time between interruptions of two phases is T/3, determining a positive sequence, and if the time is 2T/3, determining a reverse phase. According to the invention, a problem that in an actual running system, external connection devices of a contactor, a relay and the like carried by an alternating current power supply have influence on detection and determination of open-phase and reverse phase is solved.
Description
Technical field:
The present invention relates to a kind of electric power system alternating current phase shortage, anti-phase detection method, belong to the industrial detection field.
Background technology:
Use external equipments such as contactor, relay in present many power system devices; When phase shortage takes place, can cause the phase shortage voltage detecting inaccurate through their coil, thereby influence the judgement of system phase shortage; Can not in time pinpoint the problems, directly influence the security of operation of electric system.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, a kind of influence of considering external equipment to AC power is provided, can accurately judge the detection method of three-phase alternating-current supply phase shortage, anti-phase.
Technical solution of the present invention is: a kind of three-phase alternating current phase shortage, anti-phase detection method, as follows:
The three-phase alternating-current supply 1A_IN that access will detect, 1B_IN, 1C_IN obtain sampled voltage 1A_VOL, 1B_VOL, 1C_VOL through electric resistance partial pressure respectively; Zero line N with internally be connected; Sampled voltage that obtains and reference voltage are relatively exported through comparer; Comparer output obtains pulse square wave ax, bx, cx respectively, again pulse square wave is delivered to single-chip microcomputer and judges;
Phase shortage is judged: utilize three interrupt source INT0, INT1 and T0 of single-chip microcomputer, interrupt in the negative edge generation of pulse square wave, when A interrupts mutually, with counter T
AbZero clearing when B interrupts mutually, is taken out the value T of counter
Ab, and with T
BcZero clearing when C interrupts mutually, is taken out the value T of counter
Bc, with T
CaZero clearing when A interrupts mutually, is taken out the value T of counter again
Ca, again with counter T
AbZero clearing, so circulation; If do not interrupt, then can directly judge this phase phase shortage; When the power supply external equipment, if T
Ab≈ T
Bc≈ T
Ca(not being 0) judged that three-phase alternating current is normal, otherwise then is phase shortage;
Phase sequence is judged: at first according to the interval time of single-phase twice interruption, can draw cycle T, under normal circumstances, if the time between interruptions between two phases is T/3, can be judged as positive sequence, if 2T/3 then is an anti-phase.
Described comparer adopts 2252 models, and single-chip microcomputer adopts P89LPC932A1 to strengthen model, and pulse square wave ax, bx, the cx of comparer output are input to P13, P14, the P12 pin of single-chip microcomputer respectively.
The invention solves in the actual motion system, external equipments such as the contactor that AC power has, relay are to detecting the influence of judging phase shortage, anti-phase.When system's phase shortage, can still can produce interruption because the effect of external equipment coil causes phase shortage one road that the voltage input is still arranged, because three-phase alternating current differs 120 degree, work as T
Ab≈ T
Bc≈ T
CaWhen (be not 0, ignore error), judge that three-phase alternating current is normal, otherwise then be phase shortage.Illustrate: for example in the system contactor is arranged, its coil connects AB two phases, when A phase shortage wherein; Through the cause of coil, interrupt mutually can introducing B phase voltage producing interruption on the pin at A, what promptly three interrupt sources of single-chip microcomputer this moment connected is to interrupt 1:B phase (former A phase); Interrupt the 2:B phase, interrupt the 3:C phase, be all B mutually with interruption 2 because interrupt 1; Therefore will produce interruption, i.e. T simultaneously
Ab≈ 0,2T
Bc≈ T
Ca(ignoring error).Can know when system lacks A that by example the i.e. 1. T of two kinds of situation is arranged mutually
Ab≈ 0,2T
Bc≈ T
Ca(B encircles the phase into A mutually), 2. T
Ca≈ 0,2T
Ab≈ T
Bc(C encircles the phase into A mutually); Scarce B has the i.e. 1. T of two kinds of situation mutually
Ab≈ 0,2T
Ca≈ T
Bc(A encircles the phase into B mutually), 2. T
Bc≈ 0,2T
Ca≈ T
Ab(C encircles the phase into B mutually); Scarce C has the i.e. 1. T of two kinds of situation mutually
Ca≈ 0,2T
Ab≈ T
Bc(A encircles the phase into C mutually), 2. T
Bc≈ 0,2T
Ca≈ T
Ab(B encircles the phase into C mutually).
Description of drawings:
Fig. 1 is a sample circuit of the present invention.
Fig. 2 is a comparer CC of the present invention.
Fig. 3 is a single-chip microcomputer CC of the present invention.
Embodiment:
Further specify embodiments of the invention below in conjunction with accompanying drawing.
Shown in Fig. 1～3, a kind of three-phase alternating current phase shortage, anti-phase detection method, as follows:
The three-phase alternating-current supply 1A_IN that access will detect, 1B_IN, 1C_IN obtain sampled voltage 1A_VOL, 1B_VOL, 1C_VOL through electric resistance partial pressure respectively; Zero line N with internally be connected; Sampled voltage that obtains and reference voltage are relatively exported through comparer; Comparer output obtains pulse square wave ax, bx, cx respectively, again pulse square wave is delivered to single-chip microcomputer and judges;
Phase shortage is judged: utilize three interrupt source INT0, INT1 and T0 of single-chip microcomputer, interrupt in the negative edge generation of pulse square wave, when A interrupts mutually, with counter T
AbZero clearing when B interrupts mutually, is taken out the value T of counter
Ab, and with T
BcZero clearing when C interrupts mutually, is taken out the value T of counter
Bc, with T
CaZero clearing when A interrupts mutually, is taken out the value T of counter again
Ca, again with counter T
AbZero clearing, so circulation; If do not interrupt, then can directly judge this phase phase shortage; When the power supply external equipment, if T
Ab≈ T
Bc≈ T
Ca(not being 0) judged that three-phase alternating current is normal, otherwise then is phase shortage;
Phase sequence is judged: at first according to the interval time of single-phase twice interruption, can draw cycle T, under normal circumstances, if the time between interruptions between two phases is T/3, can be judged as positive sequence, if 2T/3 then is an anti-phase.
Described comparer adopts 2252 models, and single-chip microcomputer adopts P89LPC932A1 to strengthen model, and pulse square wave ax, bx, the cx of comparer output are input to P13, P14, the P12 pin of single-chip microcomputer respectively.P89LPC932A1 enhancement mode single-chip microcomputer has adopted high performance processor structure, only needs 2 to 4 clock period instruction time, and 6 times to standard 80C51 device, has therefore improved arithmetic speed greatly, thereby has improved the precision of signals collecting.P89LPC932A1 adopts 4 interrupt priority level structures, and each interrupt source all can be set to one of 4 interrupt priority levels separately, has improved great dirigibility.Many system-level functions that it is integrated can reduce the area of component number and wiring board so in a large number and reduce system cost.The highly integrated reliability of system operation that improved.
Claims (2)
1. a three-phase alternating current phase shortage, anti-phase detection method, it is characterized in that: detection method is following:
The three-phase alternating-current supply 1A_IN that access will detect, 1B_IN, 1C_IN obtain sampled voltage 1A_VOL, 1B_VOL, 1C_VOL through electric resistance partial pressure respectively; Zero line N with internally be connected; Sampled voltage that obtains and reference voltage are relatively exported through comparer; Comparer output obtains pulse square wave ax, bx, cx respectively, again pulse square wave is delivered to single-chip microcomputer and judges;
Phase shortage is judged: utilize three interrupt source INT0, INT1 and T0 of single-chip microcomputer, interrupt in the negative edge generation of pulse square wave, when A interrupts mutually, with counter T
AbZero clearing when B interrupts mutually, is taken out the value T of counter
Ab, and with T
BcZero clearing when C interrupts mutually, is taken out the value T of counter
Bc, with T
CaZero clearing when A interrupts mutually, is taken out the value T of counter again
Ca, again with counter T
AbZero clearing, so circulation; If do not interrupt, then can directly judge this phase phase shortage; When the power supply external equipment, if T
Ab≈ T
Bc≈ T
Ca(not being 0) judged that three-phase alternating current is normal, otherwise then is phase shortage;
Phase sequence is judged: at first according to the interval time of single-phase twice interruption, can draw cycle T, under normal circumstances, if the time between interruptions between two phases is T/3, can be judged as positive sequence, if 2T/3 then is an anti-phase.
2. three-phase alternating current phase shortage according to claim 1, anti-phase detection method; It is characterized in that: described comparer adopts 2252 models; Single-chip microcomputer adopts P89LPC932A1 to strengthen model, and pulse square wave ax, bx, the cx of comparer output are input to P13, P14, the P12 pin of single-chip microcomputer respectively.
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|---|---|---|---|
| CN2011101183542A CN102455396A (en) | 2011-05-09 | 2011-05-09 | Three-phase alternating current open-phase and reverse phase detection method |
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|---|---|---|---|
| CN2011101183542A CN102455396A (en) | 2011-05-09 | 2011-05-09 | Three-phase alternating current open-phase and reverse phase detection method |
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| CN102455396A true CN102455396A (en) | 2012-05-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018623A (en) * | 2012-12-18 | 2013-04-03 | 辽宁省电力有限公司辽阳供电公司 | Method for automatically adjusting phase sequence wiring error |
| CN105356416A (en) * | 2015-12-09 | 2016-02-24 | 上海辰竹仪表有限公司 | Three-phase alternating voltage phase sequence monitoring system |
| CN106546830A (en) * | 2016-10-27 | 2017-03-29 | 北京机械设备研究所 | A kind of N phase voltages phase shortage and negative phase sequence detection method |
| CN110850145A (en) * | 2019-11-28 | 2020-02-28 | 深圳麦克维尔空调有限公司 | Three-phase voltage monitoring system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948980A (en) * | 2006-11-04 | 2007-04-18 | 杨运富 | Remote short circuit multi-phase detecting method and detecting device thereof |
| CN101210944A (en) * | 2006-12-30 | 2008-07-02 | 乐金电子(天津)电器有限公司 | Compressor three phase voltage phase sequence detection method |
| CN101865966A (en) * | 2010-05-27 | 2010-10-20 | 西安厚德科技发展有限公司 | Three-phase electricity phase dislocation and open phase detection module |
| CN101976994A (en) * | 2010-09-17 | 2011-02-16 | 三一重工股份有限公司 | Conversion circuit, method and system for detecting phase sequence of three-phase power supply, and motor |
-
2011
- 2011-05-09 CN CN2011101183542A patent/CN102455396A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948980A (en) * | 2006-11-04 | 2007-04-18 | 杨运富 | Remote short circuit multi-phase detecting method and detecting device thereof |
| CN101210944A (en) * | 2006-12-30 | 2008-07-02 | 乐金电子(天津)电器有限公司 | Compressor three phase voltage phase sequence detection method |
| CN101865966A (en) * | 2010-05-27 | 2010-10-20 | 西安厚德科技发展有限公司 | Three-phase electricity phase dislocation and open phase detection module |
| CN101976994A (en) * | 2010-09-17 | 2011-02-16 | 三一重工股份有限公司 | Conversion circuit, method and system for detecting phase sequence of three-phase power supply, and motor |
Non-Patent Citations (1)
| Title |
|---|
| 李小兵: "三相专用电源屏的监测与控制系统设计", 《电子科技大学学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018623A (en) * | 2012-12-18 | 2013-04-03 | 辽宁省电力有限公司辽阳供电公司 | Method for automatically adjusting phase sequence wiring error |
| CN105356416A (en) * | 2015-12-09 | 2016-02-24 | 上海辰竹仪表有限公司 | Three-phase alternating voltage phase sequence monitoring system |
| CN105356416B (en) * | 2015-12-09 | 2017-11-03 | 上海辰竹仪表有限公司 | A kind of three-phase alternating voltage phase sequence monitoring system |
| CN106546830A (en) * | 2016-10-27 | 2017-03-29 | 北京机械设备研究所 | A kind of N phase voltages phase shortage and negative phase sequence detection method |
| CN106546830B (en) * | 2016-10-27 | 2019-09-10 | 北京机械设备研究所 | A kind of N phase voltage phase shortage and negative phase sequence detection method |
| CN110850145A (en) * | 2019-11-28 | 2020-02-28 | 深圳麦克维尔空调有限公司 | Three-phase voltage monitoring system |
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Application publication date: 20120516 |