CN102692556A - Three-phase electric quantity calculation method and apparatus thereof - Google Patents
Three-phase electric quantity calculation method and apparatus thereof Download PDFInfo
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- CN102692556A CN102692556A CN2011100735184A CN201110073518A CN102692556A CN 102692556 A CN102692556 A CN 102692556A CN 2011100735184 A CN2011100735184 A CN 2011100735184A CN 201110073518 A CN201110073518 A CN 201110073518A CN 102692556 A CN102692556 A CN 102692556A
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Abstract
The invention is suitable for the electric power field and provides a three-phase electric quantity calculation method and an apparatus thereof. The method comprises the following steps: detecting angles and amplitudes of a three-phase voltage and a three-phase current; forming a vector diagram according to the angles and the amplitudes of the three-phase voltage and the three-phase current and determining wiring of a three-phase electric energy meter according to the vector diagram; if false wiring is determined, calculating electric energy of the three-phase electric energy meter after the wiring of the three-phase electric energy meter is corrected to be the right wiring according to the wiring. By using the technical scheme provided in the invention, on-site measurement is not needed. According to the vector diagram provided by a metering chip, a grid company can discover the false wiring in real time and correct in real time. An intelligent degree is high.
Description
Technical field
The invention belongs to power domain, relate in particular to a kind of three-phase electric weight computing method and device.
Background technology
Three-phase and four-line electric energy meter (claiming the element electric energy meter again) needs calculate active power, reactive power and applied power, and its integration is realized active energy metering, reactive energy metering and apparent electric energy metrical.Be illustrated in figure 1 as the correct wiring schematic diagram of three-phase and four-line electric energy meter of the prior art (hereinafter to be referred as electric energy meter).TA1, TA2, TA3 are the primary side current mutual inductor, and former limit is surveyed electric current through A phase current
B phase current
and C phase current
secondary through A phase current
B phase current
and C phase current
and is input to electric energy computation chip current channel input end through behind the current transformer; A phase voltage
B phase voltage
C phase voltage
is input to electric energy computation chip through behind the electric resistance partial pressure, and the voltage
behind
electric resistance partial pressure is input to electric energy computation chip voltage channel input end; Electric energy computation chip is accomplished active power and reactive power, the calculating of applied power, and its integration obtained active energy, reactive energy and apparent electric energy.
Wherein, shown in the following formula of total active power that the three-phase and four-line ammeter records:
Shown in the following formula of total reactive power that the three-phase and four-line ammeter records:
Shown in the following formula of total applied power that the three-phase and four-line ammeter records:
S＝S1+S2+S3＝U
aI
a+U
bI
b+U
cI
c
" for fear of three-phase and four-line electric energy meter false wiring problem, traditional method need be passed through following steps: the first step: through the survey instrument of specialty, personnel measure electric energy meter at the scene by grid company, obtain vector plot;
Second step: the vector plot that obtains according to the scene judges whether to exist false wiring;
The 3rd step: the user is had a power failure, at the scene false wiring is corrected or changed electric energy meter;
The 4th step: the electric quantity loss that metering causes to mistake compensates or recovery.
Shortcoming so that upper type exists is obvious: find that false wiring relies on in-site measurement, the efficient that wastes time and energy is extremely low; The accuracy of measuring because site environment/survey instrument etc. causes mistake to survey easily; Can cause user's interruption maintenance; Because the electric weight miscount is easy to cause legal dispute.
Therefore, how to guarantee the accurate wiring of three-phase and four-line electric energy meter,, become one of technical barrier of current urgent need solution so that it can accurately measure electric energy.”
Because the wiring of element electric energy meter is accomplished by manual work, easy wiring error during on-the-spot the installation, some wiring error can cause the three-phase and four-line table not worked; Some wiring error can cause three-phase and four-line statistical tables and reports decompression, defluidization, and the fault of the phase failure etc., 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 undesired in fact to work, and error is very big, causes measuring mistake; This type wiring error often is difficult for investigation; Cause existing electric energy computing method accurately to measure, the electric energy metrical mistake occurs, for example: exchange like B phase and C phase voltage terminal wrong; The anti-phase of A phase current; Then general power
causes general power metering mistake, and existing correcting method must be by correcting behind the artificial in-site measurement, and the intelligent degree of electrical network is low.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of three-phase electric weight computing method, is intended to solve prior art in electric weight calculates, and wiring error can't be corrected in real time, causes the low problem of the intelligent degree of electrical network.
The embodiment of the invention is achieved in that the present invention provides a kind of three-phase electric weight computing method, and said method comprises the steps:
Detect the angle and the amplitude of three-phase voltage, three-phase current;
Angle and amplitude according to this three-phase voltage, three-phase current are formed polar plot, and judge the wiring of three-phase electricity scale according to this polar plot;
As judge wiring error, the wiring of three-phase electric energy meter is corrected to correct wiring the electric energy of metering three-phase electric energy meter according to this wiring.
The present invention also provides a kind of three-phase electricity device for calculating, and said device comprises:
The error connection line detection module is used to detect the angle and the amplitude of three-phase voltage, three-phase current, forms polar plot according to the angle and the amplitude of this three-phase voltage, three-phase current, and judges the wiring of three-phase electricity scale according to this polar plot;
Correction module is used for when judging wiring error, according to this wiring the wiring of three-phase electric energy meter corrected to correct wiring,
The electric energy metrical module is used to measure the electric energy of three-phase electric energy meter;
Said error connection line detection module specifically comprises:
The measurement of angle submodule is used to detect the angle of three-phase current, voltage;
The amplitude measurement submodule is used to detect the amplitude of three-phase current, voltage;
Submodule is judged in false wiring, is used for forming polar plot according to the angle and the amplitude of this three-phase voltage, three-phase current, and judges the wiring of three-phase electricity scale according to this polar plot.
The embodiment of the 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 corrigendum in real time, have the high advantage of intelligent degree.
Description of drawings
Fig. 1 is that a kind of network shunt that prior art provides is used synoptic diagram;
Fig. 2 is the process flow diagram of the real three-phase electric weight computing method that provide of the present invention;
The hardware structure diagram of the misphase syndrome module that Fig. 3 provides for the embodiment of the invention one
A kind of anti-phase syndrome module hardware structural drawing that Fig. 4 provides for the embodiment of the invention one;
The hardware structure diagram of a kind of electric energy computation chip that Fig. 5 provides for the embodiment of the 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 the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The present invention provides a kind of three-phase electric weight computing method, and this method is accomplished by the element electric energy meter, and this method is as shown in Figure 2, comprises the steps:
The angle and the amplitude of S21, detection three-phase voltage, three-phase current;
S22, form polar plot, and judge according to this polar plot whether the wiring of three-phase electricity scale is correct according to the angle of this three-phase voltage, three-phase current and amplitude, correct like wiring, then directly carry out S24, like wiring error, carry out S23-S24;
S23, the wiring of three-phase electric energy meter is corrected to correct wiring according to this wiring;
The electric energy of S24, metering three-phase electric energy meter.
Need to prove, the method that realizes S23 specifically can for:
S231, judge whether wiring is misphase wiring error, in this way, carry out S232-S234; As not, only carry out S234;
Misphase in S232, the control three-phase electric energy meter is corrected module the misphase wiring is corrected to correct wiring; For example, the wiring error of A phase voltage and B phase voltage (mutually wrong) is then controlled misphase syndrome module the wiring exchange of A phase voltage and B phase voltage is got final product; B phase current and C phase current wiring error are then controlled misphase syndrome module and the wiring of B phase current and C phase current is exchanged are got final product; Need to prove that above-mentioned misphase is corrected module can have 6 MUXs, concrete structural representation is as shown in Figure 3.
S233, judge whether wiring is electric current anti-phase wiring error, in this way, carry out S234; Otherwise carry out S24;
S234, with the current reversal of this reverse wiring mistake.
Need to prove, accomplish S234 concrete grammar can for, the reverse syndrome module in the control three-phase electric energy meter makes the current reversal of this electric current anti-phase wiring error.Wherein, the concrete structure synoptic diagram of reverse syndrome module is as shown in Figure 4.
Need to prove, realize that the method for S24 specifically can comprise: the electric energy of the active power of metering three-phase electric energy meter, reactive power, applied power.
Need to prove that above-mentioned wiring error can comprise: misphase wiring error and/or electric current anti-phase wiring error; Wherein misphase wiring error can comprise: voltage misphase wiring error and/or electric current misphase wiring error.
In addition, need to prove, judge that whether wrong wiring method can be the polar plot that all wiring are set in advance; Judging wiring according to this polar plot, whether with correct wiring identical, as identical if contrasting this wiring; Judge that then this wiring is correct, otherwise this wiring error.
Certainly judge wiring whether mistake method can also for, judge whether mistake of wiring through remote mode; Specifically can for: polar plot is passed to the long-range master control of grid company, and this long-range master control judges whether wiring correct.
The method that the specific embodiment of the invention provides judges whether to be wiring error through angle and the amplitude that detects electric current, voltage, in this way, then corrects this mistake; For example, A mutually with B Miswire mutually, then can A be carried out electric quantity metering after the line exchange with B mutually mutually; So this method has correction wiring error, do not need in-site measurement, the polar plot that provides according to computation chip; Grid company can be real-time the discovery false wiring, and corrigendum in real time has the high advantage of intelligent degree.
Embodiment one
Present embodiment provides a kind of three-phase electric weight computing method; This method is accomplished by the element electric energy meter; The structure of the electric energy computation chip in this three-phase electric energy meter such as Fig. 5 are (wherein; Can unify to be called the electric energy metrical module like power measurement submodule among Fig. 5 and electric energy metrical submodule) shown in, the hardware structure diagram of misphase syndrome module is as shown in Figure 3, and the concrete structure of reverse syndrome module is as shown in Figure 4; As shown in Figure 3, the voltage misphase is corrected and is made up of three MUXs 301,302,303 and U channel selecting module 304; The electric current misphase is corrected and is made up of three MUXs 305,306,307 and I channel selecting module 308.301,302,303 pairs of voltage channels that this road is used to measure of voltage MUX are selected, can be from
arbitrary road like the voltage
of A road power measurement; U channel selecting module 304 is according to the selection of each road MUX of the decision of the false wiring detection module among Fig. 5 voltage; If voltage A; The outside misphase of C; Then 304 produce corresponding signal; Make 301 selections
make 303 to select
thereby correction voltage A, the outside misphase of C.305,306,307 pairs of current channels that this road is used to measure of current multi-way selector switch are selected, can be from
arbitrary road like the electric current
of A road power measurement; I channel selecting module 308 is judged the selection of each road MUX of decision electric current according to Fig. 5 false wiring detection module; If electric current A; The outside misphase of C; Then 308 produce corresponding signal; Make 305 selections
make 307 to select
thereby correction electric current A, the outside misphase of C.When the electric current anti-phase occurring, the active power symbol is selected the selection of module 403 according to the anti-phase judged result decision selector switch 402 of Fig. 5 false wiring detection module, is the power of selecting through after the correction of the reverse module 401 of active power, does not still correct.The reactive power symbol is selected the selection of module 406 according to Fig. 3 false wiring detection module anti-phase judged result decision selector switch 405, is the power of selecting through after the correction of the reverse module 404 of reactive power, does not still correct.
Embodiment two
Present embodiment provides a kind of three-phase electricity device for calculating, and this device is as shown in Figure 6, comprising:
Error connection line detection module 61 is used to detect the angle and the amplitude of three-phase voltage, three-phase current, forms polar plot according to the angle and the amplitude of this three-phase voltage, three-phase current, and judges the wiring of three-phase electricity scale according to this polar plot;
Correction module 62 is used for when judging wiring error, according to this wiring the wiring of three-phase electric energy meter is adjusted to correct wiring,
Electric energy metrical module 63 is used to measure the electric energy of three-phase electric energy meter;
Error connection line detection module 61 specifically comprises:
Measurement of angle submodule 611 is used to detect the angle of three-phase current, voltage;
Amplitude measurement submodule 612 is used to detect the amplitude of three-phase current, voltage;
Submodule 613 is judged in false wiring, is used for forming polar plot according to the angle and the amplitude of this three-phase voltage, three-phase current, and judges the wiring of three-phase electricity scale according to this polar plot.
Wherein, above-mentioned correction module 62 can comprise:
Misphase error correction submodule 621 is used for the misphase wiring is corrected to correct wiring;
Current reversal error correction submodule 622, the electric current that is used for this anti-phase wiring error carries out oppositely.
Optional, false wiring judges that submodule 613 also is used to judge whether be misphase wiring error;
In this way, control misphase syndrome module 621 corrects the misphase wiring to correct wiring, and judges whether wiring is electric current anti-phase wiring error, and in this way, the reverse error correction submodule 622 of Control current is with the current reversal of this electric current anti-phase wiring error;
Judge like false wiring submodule 613 judges be not misphase wiring error, and the reverse error correction submodule 622 of Control current carries out the electric current of this anti-phase wiring error oppositely.
The device that present embodiment provides judges whether to be wiring error through angle and the amplitude that detects electric current, voltage, in this way, then corrects this mistake; For example, A mutually with B Miswire mutually, then can A be carried out electric quantity metering after the line exchange with B mutually mutually; 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 corrigendum in real time, have the high advantage of intelligent degree.
It should be noted that said apparatus, each included unit is just divided according to function logic, but is not limited to above-mentioned division, as long as can realize function corresponding; 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 that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Corresponding program can be stored in a kind of computer-readable recording medium; The above-mentioned storage medium of mentioning can be a ROM (read-only memory), disk or CD etc.
In sum, technical scheme provided by the invention has real-time corrigendum wiring error, the advantage that intelligent degree is high.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. three-phase electric weight computing method is characterized in that said method comprises the steps:
Detect the angle and the amplitude of three-phase voltage, three-phase current;
Angle and amplitude according to this three-phase voltage, three-phase current are formed polar plot, and judge the wiring of three-phase electricity scale according to this polar plot;
As judge wiring error, the wiring of three-phase electric energy meter is corrected to correct wiring the electric energy of metering three-phase electric energy meter according to this wiring.
2. method according to claim 1 is characterized in that, said step of extremely correct wiring is corrected in the wiring of three-phase electric energy meter according to this wiring specifically comprises:
Judge whether wiring is misphase wiring error;
In this way; Misphase syndrome module in the control three-phase electric energy meter corrects the misphase wiring to correct wiring; And judge whether wiring is electric current anti-phase wiring error, in this way, the reverse error correction submodule in the control three-phase electric energy meter is with the current reversal of this electric current anti-phase wiring error;
As not, the reverse error correction submodule in the three-phase electric energy meter carries out the electric current of this reverse wiring mistake oppositely.
3. method according to claim 1 is characterized in that, the step of the electric energy of said 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.
4. a three-phase electricity device for calculating is characterized in that, said device comprises:
The error connection line detection module is used to detect the angle and the amplitude of three-phase voltage, three-phase current, forms polar plot according to the angle and the amplitude of this three-phase voltage, three-phase current, and judges the wiring of three-phase electricity scale according to this polar plot;
Correction module is used for when judging wiring error, according to this wiring the wiring of three-phase electric energy meter corrected to correct wiring,
The electric energy metrical module is used to measure the electric energy of three-phase electric energy meter;
Said error connection line detection module specifically comprises:
The measurement of angle submodule is used to detect the angle of three-phase current, voltage;
The amplitude measurement submodule is used to detect the amplitude of three-phase current, voltage;
Submodule is judged in false wiring, is used for forming polar plot according to the angle and the amplitude of this three-phase voltage, three-phase current, and judges the wiring of three-phase electricity scale according to this polar plot.
5. device according to claim 4 is characterized in that, said correction module comprises:
Misphase error correction submodule is used for the misphase wiring is corrected to correct wiring;
Current reversal error correction submodule, the electric current that is used for this reverse wiring mistake carries out oppositely.
6. device according to claim 5 is characterized in that,
Said false wiring judges that submodule also is used to judge whether be misphase wiring error;
In this way, control said misphase syndrome module the misphase wiring is corrected to correct wiring, and judge whether wiring is electric current anti-phase wiring error, in this way, control the current reversal of said current reversal error correction submodule this reverse wiring mistake;
Judge that like said false wiring it is not misphase wiring error that submodule is judged, control said current reversal error correction submodule the electric current of this anti-phase wiring error is carried out 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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Cited By (16)
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|---|---|---|---|---|
| CN102890170A (en) * | 2012-11-09 | 2013-01-23 | 成都天兴电气有限公司 | Automatic false wiring conversion system for three-phase electric energy meter and implementation method thereof |
| CN103513220A (en) * | 2013-09-24 | 2014-01-15 | 国家电网公司 | Method for judging false wiring of three-phase three-wire electric energy meter |
| CN103728477A (en) * | 2014-01-28 | 2014-04-16 | 成都天兴电气有限公司 | Three-phase kilowatt-hour meter false wiring automatic conversion 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 |
| CN105911420A (en) * | 2016-05-30 | 2016-08-31 | 厦门大学嘉庚学院 | Algorithm for automatically identifying 192 three-phase three-wire electric energy meter wiring modes |
| CN106523338A (en) * | 2016-12-16 | 2017-03-22 | 李金洲 | Central air conditioner cooling water circulating pump control system capable of monitoring real-time energy consumption |
| CN108646089A (en) * | 2018-06-14 | 2018-10-12 | 广东电网有限责任公司 | Electricity consumption computational methods, device and electronic equipment |
| CN108964079A (en) * | 2018-08-07 | 2018-12-07 | 浙江亿德科技有限公司 | The mutual inductor interstar connection configuration method of power quality controlling equipment |
| CN109270399A (en) * | 2018-08-07 | 2019-01-25 | 浙江亿德科技有限公司 | The mutual inductor interstar connection automatic patching system of power quality controlling equipment |
| CN109507630A (en) * | 2019-01-14 | 2019-03-22 | 广东电网有限责任公司 | Wiring judgment method and system |
| CN111726557A (en) * | 2019-03-19 | 2020-09-29 | 西安诺瓦电子科技有限公司 | Equipment channel control method and device, multi-equipment system and video processor |
| 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 |
| CN112557749A (en) * | 2020-12-15 | 2021-03-26 | 深圳市锐能微科技有限公司 | Electric energy metering method and electric energy metering device of three-phase four-wire electric energy meter |
| CN114265000A (en) * | 2021-12-21 | 2022-04-01 | 安徽南瑞中天电力电子有限公司 | Electric energy meter error correction method and system based on wrong wiring vector diagram |
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| CN102890170A (en) * | 2012-11-09 | 2013-01-23 | 成都天兴电气有限公司 | Automatic false wiring conversion system for three-phase electric energy meter and implementation method thereof |
| CN103513220A (en) * | 2013-09-24 | 2014-01-15 | 国家电网公司 | Method for judging false wiring of three-phase three-wire electric energy meter |
| CN103728477A (en) * | 2014-01-28 | 2014-04-16 | 成都天兴电气有限公司 | Three-phase kilowatt-hour meter false wiring automatic conversion 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 |
| CN105911420A (en) * | 2016-05-30 | 2016-08-31 | 厦门大学嘉庚学院 | Algorithm for automatically identifying 192 three-phase three-wire electric energy meter wiring modes |
| CN106523338A (en) * | 2016-12-16 | 2017-03-22 | 李金洲 | Central air conditioner cooling water circulating pump control system capable of monitoring real-time energy consumption |
| CN108646089A (en) * | 2018-06-14 | 2018-10-12 | 广东电网有限责任公司 | Electricity consumption computational methods, device and electronic equipment |
| CN108964079A (en) * | 2018-08-07 | 2018-12-07 | 浙江亿德科技有限公司 | The mutual inductor interstar connection configuration method of power quality controlling equipment |
| CN109270399A (en) * | 2018-08-07 | 2019-01-25 | 浙江亿德科技有限公司 | The mutual inductor interstar connection automatic patching system of power quality controlling equipment |
| CN109507630A (en) * | 2019-01-14 | 2019-03-22 | 广东电网有限责任公司 | Wiring judgment method and system |
| CN111726557A (en) * | 2019-03-19 | 2020-09-29 | 西安诺瓦电子科技有限公司 | Equipment channel control method and device, multi-equipment system and video processor |
| 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 |
| CN112557749A (en) * | 2020-12-15 | 2021-03-26 | 深圳市锐能微科技有限公司 | Electric energy metering method and electric energy metering device of three-phase four-wire electric energy meter |
| CN114265000A (en) * | 2021-12-21 | 2022-04-01 | 安徽南瑞中天电力电子有限公司 | Electric energy meter error correction method and system based on wrong wiring vector diagram |
| 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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