CN102692556B - A kind of three-phase electricity amount computing method and device - Google Patents
A kind of three-phase electricity amount computing method and device Download PDFInfo
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- CN102692556B CN102692556B CN201110073518.4A CN201110073518A CN102692556B CN 102692556 B CN102692556 B CN 102692556B CN 201110073518 A CN201110073518 A CN 201110073518A CN 102692556 B CN102692556 B CN 102692556B
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Abstract
The present invention is applicable to power domain, the invention provides a kind of three-phase electricity amount computing method and device, and the method comprises the steps: angle and the amplitude of detection three-phase voltage, three-phase current; According to angle and the amplitude composition polar plot of this three-phase voltage, three-phase current, and judge the wiring of three-phase voltameter according to this polar plot; As judged wiring error, according to this wiring, the wiring of three-phase electric energy meter is corrected to correct wiring, the electric energy of metering three-phase electric energy meter.Technical scheme provided by the invention does not need in-site measurement, according to the polar plot that computation chip provides, and the discovery false wiring that grid company can be real-time, and correct in real time, there is the advantage that intelligence degree is high.
Description
Technical field
The invention belongs to power domain, particularly relate to a kind of three-phase electricity amount computing method and device.
Background technology
Three-phase and four-line electric energy meter (also known as three element electric energy meters) needs to calculate active power, reactive power and applied power, and realizes active energy metering, reactive energy measurement and apparent electric energy metrical to its integration.Be illustrated in figure 1 the correct wiring schematic diagram of three-phase and four-line electric energy meter (hereinafter referred to as electric energy meter) of the prior art.TA1, TA2, TA3 are primary side current mutual inductor, and former limit is by A phase current
phase current
with C phase current
secondary is by A phase current
phase current
with C phase current
survey electric current after current transformer, be input to electric energy computation chip current channel input end; A phase voltage
b phase voltage
c phase voltage
electric energy computation chip is input to after electric resistance partial pressure,
voltage after electric resistance partial pressure
be input to electric energy computation chip voltage channel input end; Electric energy computation chip completes active power and reactive power, the calculating of applied power, and obtains active energy, reactive energy and apparent electric energy to its integration.
Wherein, shown in the following formula of total active power that three-phase and four-line ammeter records:
Shown in the following formula of total reactive power that three-phase and four-line ammeter records:
Shown in the following formula of total applied power that three-phase and four-line ammeter records:
S＝S1+S2+S3＝U
aI
a+U
bI
b+U
cI
c
" in order to avoid three-phase and four-line electric energy meter false wiring problem, traditional method needs through following steps: the first step: by the survey instrument of specialty, by grid company, personnel measure electric energy meter at the scene, obtains vector plot;
Second step: judge whether to there is false wiring according to the vector plot that scene obtains;
3rd step: user is had a power failure, at the scene false wiring is corrected or change electric energy meter;
4th step: the electric quantity loss that erroneous metrology causes is compensated or recovery.
Apparent with the shortcoming that upper type exists: find that false wiring relies on in-site measurement, the efficiency that wastes time and energy is extremely low; The accuracy of measuring is surveyed because site environment/survey instrument etc. easily causes by mistake; User's interruption maintenance can be caused; Because electricity miscount is easy to cause legal dispute.
Therefore, how to ensure the accurate wiring of three-phase and four-line electric energy meter, with can accurate-metering electric energy, become current and be badly in need of one of technical barrier solved.”
Because the wiring of three element electric energy meters is by manually completing, easy wiring error during in-site installation, some wiring error can cause three-phase and four-line table not work; Some wiring error can cause three-phase and four-line statistical tables and reports decompression, defluidization, disconnected equal fault, and these false wirings are all better investigated; But some wiring error will cause three-phase and four-line electric energy meter endure also not report fault, but it is abnormal in fact to work, error is very large, cause measuring error, this kind of wiring error is often not easily investigated, and causes existing energy calculate method cannot accurate-metering, there is electric energy metrical mistake, such as: as B phase and C phase voltage terminal wrong exchange, A phase current is anti-phase, then general power
cause general power measuring error, existing correcting method must measure rear corrigendum by manual site, and electrical network intelligence degree is low.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of three-phase electricity amount computing method, is intended to solve prior art in electricity calculates, and wiring error cannot real time correction, causes the problem that electrical network intelligence degree is low.
The embodiment of the present invention is achieved in that and the invention provides a kind of three-phase electricity amount computing method, and described method comprises the steps:
The angle of detection three-phase voltage, three-phase current and amplitude;
According to angle and the amplitude composition polar plot of this three-phase voltage, three-phase current, and judge the wiring of three-phase voltameter according to this polar plot, or described polar plot is passed to grid company remote master, judge that whether wiring is correct by described remote master;
Judge whether wiring is misphase wiring error; In this way, misphase wiring is corrected to correct wiring by the misphase syndrome module controlled in three-phase electric energy meter, and judge whether wiring is anti-phase wiring error, in this way, the reverse error correction submodule in control three-phase electric energy meter is by reverse for the electric current of this anti-phase wiring error; As no, the electric current of this reverse wiring mistake carries out oppositely by the reverse error correction submodule in three-phase electric energy meter; As judged wiring error, according to this wiring, the wiring of three-phase electric energy meter is corrected to correct wiring, the electric energy of metering three-phase electric energy meter;
Described wiring error comprises: misphase wiring error and/or anti-phase wiring error;
Described misphase wiring error comprises: voltage misphase wiring error and/or electric current misphase wiring error;
Voltage misphase is corrected and is made up of three MUX and U channel selecting module;
Three MUX that voltage misphase is corrected are selected the voltage channel for measuring, and U channel selecting module determines the selection of voltage each road MUX according to false wiring detection module, thus correct the outside misphase of voltage;
Electric current misphase is corrected and is made up of three MUX and I channel selecting module;
The MUX that electric current misphase is corrected is selected the current channel for measuring, and I channel selecting module judges according to false wiring detection module the selection determining electric current each road MUX, thus corrects current external misphase.
The present invention also provides a kind of three-phase electricity device for calculating, and described device comprises:
Error connection line detection module, for detecting three-phase voltage, the angle of three-phase current and amplitude, according to angle and the amplitude composition polar plot of this three-phase voltage, three-phase current, and the wiring of three-phase voltameter is judged according to this polar plot, or described polar plot is passed to grid company remote master, judge that whether wiring is correct by described remote master;
Described false wiring judges submodule also for determining whether misphase wiring error; In this way, control described misphase syndrome module and misphase wiring is corrected to correct wiring, and judge whether wiring is anti-phase wiring error, in this way, control described electric current reverse error correction submodule by reverse for the electric current of this reverse wiring mistake; As described in false wiring judge that submodule judges not as misphase wiring error, control described electric current reverse error correction submodule and the electric current of this anti-phase wiring error carried out oppositely;
Correction module, for when judging wiring error, corrects to correct wiring according to this wiring by the wiring of three-phase electric energy meter,
Electric energy metering module, for the electric energy of metering three-phase electric energy meter;
Described error connection line detection module specifically comprises:
Measurement of angle submodule, for detecting the angle of three-phase current, voltage;
Amplitude measurement submodule, for detecting the amplitude of three-phase current, voltage;
False wiring judges submodule, for according to the angle of this three-phase voltage, three-phase current and amplitude composition polar plot, and judges the wiring of three-phase voltameter according to this polar plot;
Described wiring error comprises: misphase wiring error and/or anti-phase wiring error;
Described misphase wiring error comprises: voltage misphase wiring error and/or electric current misphase wiring error;
Voltage misphase is corrected and is made up of three MUX and U channel selecting module;
Three MUX that voltage misphase is corrected are selected the voltage channel for measuring, and U channel selecting module determines the selection of voltage each road MUX according to false wiring detection module, thus correct the outside misphase of voltage;
Electric current misphase is corrected and is made up of three MUX and I channel selecting module;
The MUX that electric current misphase is corrected is selected the current channel for measuring, and I channel selecting module judges according to false wiring detection module the selection determining electric current each road MUX, thus corrects current external misphase.
The embodiment of the present invention compared with prior art, beneficial effect is: technical scheme of the present invention does not need in-site measurement, according to the polar plot that computation chip provides, and the discovery false wiring that grid company can be real-time, and correct in real time, there is the advantage that intelligence degree is high.
Accompanying drawing explanation
Fig. 1 is a kind of network shunt device application schematic diagram that prior art provides;
The process flow diagram of the three-phase electricity amount computing method that Fig. 2 provides for the present invention is real;
The hardware structure diagram of the misphase syndrome module that Fig. 3 provides for the embodiment of the present invention one
The one anti-phase syndrome module hardware structural drawing that Fig. 4 provides for the embodiment of the present invention one;
The hardware structure diagram of a kind of electric energy computation chip that Fig. 5 provides for the embodiment of the present invention one;
Fig. 6 is the structural drawing of a kind of three-phase electricity device for calculating provided by the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of three-phase electricity amount computing method, the method is completed by three element electric energy meters, and the method as shown in Figure 2, comprises the steps:
The angle of S21, detection three-phase voltage, three-phase current and amplitude;
S22, according to the angle of this three-phase voltage, three-phase current and amplitude composition polar plot, and judge that whether the wiring of three-phase voltameter correct according to this polar plot, as wiring correctly, then directly carry out S24, as wiring error, carry out S23-S24;
S23, according to this wiring, the wiring of three-phase electric energy meter is corrected to correct wiring;
The electric energy of S24, metering three-phase electric energy meter.
It should be noted that, the method realizing S23 is specifically as follows:
S231, judge whether wiring is misphase wiring error, in this way, perform S232-S234; As no, only perform S234;
S232, the misphase controlled in three-phase electric energy meter are corrected module and are corrected misphase wiring to correct wiring; Such as, the wiring error (mutual wrong) of A phase voltage and B phase voltage, then control misphase syndrome module and the wiring of A phase voltage and B phase voltage exchanged; B phase current and C phase current wiring error, then control misphase syndrome module and the wiring of B phase current and C phase current exchanged; It should be noted that, above-mentioned misphase corrects module can 6 MUX, and concrete structural representation as shown in Figure 3.
S233, judge whether wiring is anti-phase wiring error, in this way, perform S234; Otherwise perform S24;
S234, by reverse for the electric current of this reverse wiring mistake.
It should be noted that, the concrete grammar completing S234 can be, the reverse syndrome module controlled in three-phase electric energy meter makes the electric current of this anti-phase wiring error reverse.Wherein, the concrete structure schematic diagram of reverse syndrome module as shown in Figure 4.
It should be noted that, the method realizing S24 specifically can comprise: the electric energy of the active power of metering three-phase electric energy meter, reactive power, applied power.
It should be noted that, above-mentioned wiring error can comprise: misphase wiring error and/or anti-phase wiring error; Wherein misphase wiring error can comprise: voltage misphase wiring error and/or electric current misphase wiring error.
In addition, it should be noted that, judge whether wrong method can be in wiring: the polar plot pre-setting all wiring, judge wiring according to this polar plot, contrast this wiring whether identical with correct wiring, as identical, then judge that this wiring is correct, otherwise this wiring error.
Certainly, judge that the method for wiring whether mistake can also be, judge wiring whether mistake by remote mode; Be specifically as follows: polar plot is passed to grid company remote master, this remote master judges that whether wiring is correct.
The method that the specific embodiment of the invention provides determines whether wiring error by detecting electric current, the angle of voltage and amplitude, in this way, then this mistake is corrected, such as, A phase and B phase Miswire, carry out electric quantity metering after then A phase and B phase line can being exchanged, there is correction wiring error in this way, do not need in-site measurement, according to the polar plot that computation chip provides, grid company can be real-time discovery false wiring, and to correct in real time, there is the advantage that intelligence degree is high.
embodiment one
The present embodiment provides a kind of three-phase electricity amount computing method, the method is completed by three element electric energy meters, the structure of the electric energy computation chip in this three-phase electric energy meter as Fig. 5 (wherein, as the power measurement submodule in Fig. 5 and electric energy metrical submodule can be collectively referred to as electric energy metering module) shown in, the hardware structure diagram of misphase syndrome module as shown in Figure 3, the concrete structure of reverse syndrome module as shown in Figure 4, as shown in Figure 3, voltage misphase is corrected and is made up of three MUX 301,302,303 and U channel selecting module 304; Electric current misphase is corrected and is made up of three MUX 305,306,307 and I channel selecting module 308.Voltage MUX 301,302,303 is selected for the voltage channel measured this road, as the voltage of A road power measurement
can be from
arbitrary road; U channel selecting module 304 determines the selection of voltage each road MUX according to the false wiring detection module in Fig. 5, if the outside misphase of voltage A, C, then 304 produces corresponding signal, makes 301 selections
make 303 selections
thus correct voltage A, the outside misphase of C.Current multi-way selector switch 305,306,307 is selected for the current channel measured this road, as the electric current of A road power measurement
can be from
arbitrary road; I channel selecting module 308 judges according to Fig. 5 false wiring detection module the selection determining electric current each road MUX, if the outside misphase of electric current A, C, then 308 produces corresponding signal, makes 305 selections
make 307 selections
thus correct electric current A, the outside misphase of C.When there is anti-phase, active power symbol selects module 403 to determine the selection of selector switch 402 according to the anti-phase judged result of Fig. 5 false wiring detection module, is select the power after the correction of the reverse module 401 of active power, does not still correct.Reactive power symbol selects module 406 to determine the selection of selector switch 405 according to the anti-phase judged result of Fig. 3 false wiring detection module, is select the power after the correction of the reverse module 404 of reactive power, does not still correct.
embodiment two
The present embodiment provides a kind of three-phase electricity device for calculating, and this device as shown in Figure 6, comprising:
Error connection line detection module 61, for detecting three-phase voltage, the angle of three-phase current and amplitude, according to angle and the amplitude composition polar plot of this three-phase voltage, three-phase current, and judges the wiring of three-phase voltameter according to this polar plot;
Correction module 62, for when judging wiring error, is adjusted to correct wiring according to this wiring by the wiring of three-phase electric energy meter,
Electric energy metering module 63, for the electric energy of metering three-phase electric energy meter;
Error connection line detection module 61 specifically comprises:
Measurement of angle submodule 611, for detecting the angle of three-phase current, voltage;
Amplitude measurement submodule 612, for detecting the amplitude of three-phase current, voltage;
False wiring judges submodule 613, for according to the angle of this three-phase voltage, three-phase current and amplitude composition polar plot, and judges the wiring of three-phase voltameter according to this polar plot.
Wherein, above-mentioned correction module 62 can comprise:
Misphase error correction submodule 621, for correcting misphase wiring to correct wiring;
The reverse error correction submodule 622 of electric current, the electric current for this anti-phase wiring error carries out oppositely.
Optionally, false wiring judges submodule 613 also for determining whether misphase wiring error;
In this way, control misphase syndrome module 621 and misphase wiring is corrected to correct wiring, and judge whether wiring is anti-phase wiring error, in this way, control electric current reverse error correction submodule 622 by reverse for the electric current of this anti-phase wiring error;
As false wiring judges that submodule 613 judges not as misphase wiring error, control electric current reverse error correction submodule 622 and the electric current of this anti-phase wiring error is carried out oppositely.
The device that the present embodiment provides determines whether wiring error by detecting electric current, the angle of voltage and amplitude, in this way, then correct this mistake, such as, A phase and B phase Miswire, electric quantity metering is carried out after then A phase and B phase line can being exchanged, so this device does not need in-site measurement, according to the polar plot that computation chip provides, the discovery false wiring that grid company can be real-time, and correct in real time, there is the advantage that intelligence degree is high.
It should be noted that said apparatus, included unit is carry out dividing according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit, also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
In addition, one of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program completes, corresponding program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
In sum, technical scheme provided by the invention has corrects wiring error in real time, the advantage that intelligence degree is high.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. three-phase electricity amount computing method, is characterized in that, described method comprises the steps:
The angle of detection three-phase voltage, three-phase current and amplitude;
According to angle and the amplitude composition polar plot of described three-phase voltage, three-phase current, and judge the wiring of three-phase voltameter according to described polar plot, or described polar plot is passed to grid company remote master, judge that whether wiring is correct by described remote master;
Judge whether wiring is misphase wiring error; In this way, misphase wiring is corrected to correct wiring by the misphase syndrome module controlled in three-phase electric energy meter, and judge whether wiring is anti-phase wiring error, in this way, the reverse error correction submodule in control three-phase electric energy meter is by reverse for the electric current of anti-phase wiring error; As no, the electric current of reverse wiring mistake carries out oppositely by the reverse error correction submodule in three-phase electric energy meter;
As judged wiring error, according to wiring, the wiring of three-phase electric energy meter is corrected to correct wiring, the electric energy of metering three-phase electric energy meter;
Described wiring error comprises: misphase wiring error and/or anti-phase wiring error;
Described misphase wiring error comprises: voltage misphase wiring error and/or electric current misphase wiring error;
Voltage misphase is corrected and is made up of the first MUX, the second MUX, the 3rd MUX and U channel selecting module;
Described first, second, third MUX is selected the voltage channel for measuring, and described U channel selecting module determines the selection of voltage each road MUX according to false wiring detection module, thus corrects the outside misphase of voltage;
Electric current misphase is corrected and is made up of the 5th MUX, the 6th MUX, the 7th MUX and I channel selecting module;
Described 5th, the 6th, the 7th MUX is selected the current channel for measuring, and described I channel selecting module judges according to false wiring detection module the selection determining electric current each road MUX, thus corrects current external misphase.
2. method according to claim 1, is characterized in that, the step of the electric energy of described metering three-phase electric energy meter specifically comprises:
The electric energy of the active power of metering three-phase electric energy meter, reactive power, applied power.
3. a three-phase electricity device for calculating, is characterized in that, described device comprises:
Error connection line detection module, for detecting three-phase voltage, the angle of three-phase current and amplitude, according to angle and the amplitude composition polar plot of described three-phase voltage, three-phase current, and the wiring of three-phase voltameter is judged according to described polar plot, or described polar plot is passed to grid company remote master, judge that whether wiring is correct by described remote master;
False wiring judges that submodule is used for determining whether misphase wiring error; In this way, control misphase syndrome module and misphase wiring is corrected to correct wiring, and judge whether wiring is anti-phase wiring error, in this way, control electric current reverse error correction submodule by reverse for the electric current of reverse wiring mistake; As described in false wiring judge that submodule judges not as misphase wiring error, control described electric current reverse error correction submodule and the electric current of anti-phase wiring error carried out oppositely;
Correction module, for when judging wiring error, corrects to correct wiring according to wiring by the wiring of three-phase electric energy meter;
Electric energy metering module, for the electric energy of metering three-phase electric energy meter;
Described error connection line detection module specifically comprises:
Measurement of angle submodule, for detecting the angle of three-phase current, voltage;
Amplitude measurement submodule, for detecting the amplitude of three-phase current, voltage;
False wiring judges submodule, for according to the angle of three-phase voltage, three-phase current and amplitude composition polar plot, and judges the wiring of three-phase voltameter according to described polar plot;
Described wiring error comprises: misphase wiring error and/or anti-phase wiring error;
Described misphase wiring error comprises: voltage misphase wiring error and/or electric current misphase wiring error;
Voltage misphase is corrected and is made up of the first MUX, the second MUX, the 3rd MUX and U channel selecting module;
Described first, second, third MUX is selected the voltage channel for measuring, and U channel selecting module determines the selection of voltage each road MUX according to false wiring detection module, thus corrects the outside misphase of voltage;
Electric current misphase is corrected and is made up of the 5th MUX, the 6th MUX, the 7th MUX and I channel selecting module;
Described 5th, the 6th, the 7th MUX is selected the current channel for measuring, and I channel selecting module judges according to false wiring detection module the selection determining electric current each road MUX, thus corrects current external misphase.
4. device according to claim 3, is characterized in that, described correction module comprises:
Misphase syndrome module, for correcting misphase wiring to correct wiring;
The reverse error correction submodule of electric current, for being undertaken the electric current of reverse wiring mistake oppositely.
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| CN201110073518.4A CN102692556B (en) | 2011-03-25 | 2011-03-25 | A kind of three-phase electricity amount computing method and device |
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| CN201110073518.4A CN102692556B (en) | 2011-03-25 | 2011-03-25 | A kind of three-phase electricity amount computing method and device |
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| CN103513220B (en) * | 2013-09-24 | 2014-11-19 | 国家电网公司 | Method for judging false wiring of three-phase three-wire electric energy meter |
| CN103728477B (en) * | 2014-01-28 | 2016-03-30 | 成都天兴电气有限公司 | Three-phase electric energy meter false wiring automatic switching method |
| CN104155562A (en) * | 2014-08-25 | 2014-11-19 | 积成电子股份有限公司 | Method for remotely detecting wiring situation of electricity meter based on acquisition system |
| CN104459603A (en) * | 2014-12-26 | 2015-03-25 | 杨兴旺 | Method and device for detecting three-phase three-wire energy measurement device |
| CN105717358A (en) * | 2015-11-24 | 2016-06-29 | 国家电网公司 | Method for accurately calculating corrected electric quantity under wrong wiring of three-phase four-wire intelligent electric energy meter |
| CN105911420B (en) * | 2016-05-30 | 2018-09-18 | 厦门大学嘉庚学院 | The method of 192 kinds of three-phase three-wire electric energy meter modes of connection of automatic discrimination |
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| CN109507630A (en) * | 2019-01-14 | 2019-03-22 | 广东电网有限责任公司 | Wiring judgment method and system |
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| CN111983521A (en) * | 2020-06-05 | 2020-11-24 | 安徽南瑞中天电力电子有限公司 | Electric energy meter with functions of automatic identification of wrong wiring and correct metering and method thereof |
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| CN114265000B (en) * | 2021-12-21 | 2023-12-15 | 安徽南瑞中天电力电子有限公司 | Error correction method and system for electric energy meter based on error wiring vector diagram |
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