CN102183706B - Device and method for correcting metering of three-phase three-wire false wiring - Google Patents

Device and method for correcting metering of three-phase three-wire false wiring Download PDF

Info

Publication number
CN102183706B
CN102183706B CN 201110058481 CN201110058481A CN102183706B CN 102183706 B CN102183706 B CN 102183706B CN 201110058481 CN201110058481 CN 201110058481 CN 201110058481 A CN201110058481 A CN 201110058481A CN 102183706 B CN102183706 B CN 102183706B
Authority
CN
China
Prior art keywords
power
correcting
active
reactive power
coff
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN 201110058481
Other languages
Chinese (zh)
Other versions
CN102183706A (en
Inventor
苗书立
赵文静
刘凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Renergy Technology Co.,Ltd.
Original Assignee
SHENZHEN RENERGY TECHNOLOGY CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENZHEN RENERGY TECHNOLOGY CO LTD filed Critical SHENZHEN RENERGY TECHNOLOGY CO LTD
Priority to CN 201110058481 priority Critical patent/CN102183706B/en
Publication of CN102183706A publication Critical patent/CN102183706A/en
Application granted granted Critical
Publication of CN102183706B publication Critical patent/CN102183706B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention provides a device and a relevant method for correcting the metering of three-phase three-wire false wiring. The method comprises the following steps of: performing active power and reactive power metering on input voltage and input current; metering an angle and an amplitude according to the input voltage and the input current; judging whether false wiring exists or not according to a vector diagram consisting of the angle and the amplitude; if the false wiring exists, correcting the active power and the reactive power; and completing electric energy metering and outputting a power metering result. In the invention, on-site metering is not required; and according to the vector diagram provided by a metering chip, a transmission provider can discover and correct the false wiring in real time, and immediately solve the problem, so the method and the device are time-saving, labor-saving, and high in efficiency.

Description

The apparatus and method of correcting metering of three-phase three-wire false wiring
Technical field
The present invention relates to a kind of electric power meter, especially relate to a kind of device and correlation method of correcting metering of three-phase three-wire false wiring.
Background technology
Three-phase three-wire electric energy meter (claiming again the two element electric energy meter) needs calculate active power and reactive power, and its integration is realized active energy metering and reactive energy measurement.
The correct wiring schematic diagram of three-phase three-wire electric energy meter (hereinafter to be referred as electric energy meter) as shown in Figure 1.TV1, TV2 are the primary side voltage transformer (VT), the former edge joint of TV1 Secondary connects
Figure BDA0000049770950000012
The former edge joint of TV2 Secondary connects TA1, TA2 are the primary side current mutual inductor, and former limit is by the A phase current
Figure BDA0000049770950000015
With the B phase current
Figure BDA0000049770950000016
Secondary is by the A phase current
Figure BDA0000049770950000017
With the B phase current
Figure BDA0000049770950000018
Be input to electric energy computation chip after surveying voltage and surveying electric current process voltage and current mutual inductor, complete the calculating of active power and reactive power, and its integration is obtained active energy and reactive energy.
Wherein, total active power of recording of phase three-wire three ammeter is as shown in formula (1-1):
Figure BDA0000049770950000019
Total reactive power that the phase three-wire three ammeter records is as shown in formula (1-2):
Figure BDA00000497709500000110
Under the correct mode of connection, between line voltage/line current between and have a relatively-stationary phase relation and amplitude relation between voltage and current.If there is false wiring, can cause so the relative angle of voltage and current to rotate, amplitude changes, and supposes line voltage
Figure BDA00000497709500000111
And I aAngle with And I cRelative angle rotated respectively
Figure BDA00000497709500000113
With
Figure BDA00000497709500000114
Total active power of recording of phase three-wire three ammeter will change so, as shown in formula (1-3).
Figure BDA0000049770950000021
Total reactive power also can change, as shown in formula (1-4):
Figure BDA0000049770950000022
As formula (1-3) with (1-4), due to the variation of three-phase three-line voltage and electric current relative angle, total active power that electric energy meter records and total reactive power have produced error.Wherein,
Figure BDA0000049770950000023
Figure BDA0000049770950000024
λ 1, λ 2For causing the current amplitude variation factor by reasons such as A/C channel errors wiring, equal to change current amplitude ratio under the amplitude of after-current and correct wiring.
This shows, the correct wiring of electric energy meter is the most important condition that guarantees the correct metering of electric energy meter, because the error of electric energy meter is generally very little, but false wiring is but often very large to the error that electric energy metrical brings.Owing to often easily making a mistake in the installation wiring process of electric energy meter, three-phase electric energy meter particularly, false wiring of a great variety.
For fear of three-phase three-wire electric energy meter false wiring problem, traditional method need to be passed through following steps:
The first step: by 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.
Apparent with the shortcoming that upper type exists: find that false wiring relies on in-site measurement, the efficient that wastes time and energy is extremely low; The accuracy of measuring easily causes mistake to survey due to site environment/survey instrument etc.; 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 three-wire electric energy meter, with can the accurate-metering electric energy, become one of technical barrier that current urgent need solves.
Summary of the invention
The present invention proposes a kind of device and correlation method of correcting metering of three-phase three-wire false wiring, automatically completes more orthofunction of false wiring detection, measuring error by the electric energy computation chip of three-phase three-wire electric energy meter inside.
The present invention adopts following technical scheme to realize: a kind of method of correcting metering of three-phase three-wire false wiring, and it comprises step: the voltage of input and input current are carried out active-power P ' (m) and reactive power Q ' (m) measure; Measure angle and amplitude according to voltage and the input current of input, the polar plot that forms according to angle and amplitude judges whether to exist false wiring, if there is false wiring, active power and reactive power is corrected; Complete electric energy metrical, the output Electric energy measurement.
Wherein, described step to active-power P ' (m) correct comprises: will be according to input voltage
Figure BDA0000049770950000031
And input current
Figure BDA0000049770950000032
Multiplying each other to process obtains the first active-power P ' 1 (m) and correction coefficient Coff_A phase multiplication, operation result and Coff_BQ ' 1 (m) is carried out additive operation, the first active-power P 1 (m) that obtains correcting; With input voltage
Figure BDA0000049770950000033
And input current
Figure BDA0000049770950000034
Multiply each other the second active-power P of process obtaining ' 2 (m) with carry out the phase multiplication with correction coefficient Coff_C, operation result and Coff_DQ ' 2 (m) are carried out additive operation, the second active-power P 2 (m) that obtains correcting; The first active-power P 1 (m) of correcting and the second active-power P 2 (m) of correcting are carried out the active-power P (m) that additive operation obtains correcting.
Wherein, described step to reactive power Q ' (m) correct comprises: with input voltage
Figure BDA0000049770950000035
And input current
Figure BDA0000049770950000036
The first reactive power Q that obtains through multiplying each other after 90 ° of phase shifts processing ' 1 (m) carries out the phase multiplication with correction coefficient Coff_A, and operation result is deducted Coff_BP ' 1 (m), obtains the first reactive power Q 1 (m) of correcting; With input voltage And input current
Figure BDA0000049770950000038
The second reactive power Q that obtains as multiplying each other after 90 ° of processing of phase shift ' 2 (m) carry out the phase multiplication with correction coefficient Coff_C, and operation result is deducted Coff_DP ' 2 (m), obtain the second reactive power Q 2 (m) of correcting; The first reactive power Q 1 (m) of correcting and the second reactive power Q 2 (m) of correcting are carried out additive operation, obtain at last the reactive power Q (m) of correcting.
Wherein, correction coefficient
Figure BDA0000049770950000041
Correction coefficient
Figure BDA0000049770950000042
Correction coefficient
Figure BDA0000049770950000043
Correction coefficient
Figure BDA0000049770950000044
Figure BDA0000049770950000045
Figure BDA0000049770950000046
Figure BDA0000049770950000047
Figure BDA0000049770950000048
Figure BDA0000049770950000049
Voltage during for false wiring And I aThe relative correct wiring of angle the time relative rotation angle that occurs,
Figure BDA00000497709500000411
Voltage during for false wiring
Figure BDA00000497709500000412
And I cThe relative correct wiring of angle the time relative rotation angle that occurs, λ 1And λ 2Be respectively the A phase and cause the variation factor of current amplitude with C due to false wiring.
Wherein, described electric energy metrical is that active power and reactive power are carried out respectively integral and calculating, obtains active energy and reactive energy.
The present invention proposes a kind of device of correcting metering of three-phase three-wire false wiring, and it comprises:
The false wiring detection module, for detection of the voltage, angle and the amplitude of electric current of input, the polar plot that forms according to angle and amplitude judges whether to exist false wiring;
The power measurement module is used for calculating active-power P ' (m) and reactive power metering Q ' (m) according to the voltage of input and input current;
Correct module, be used for detecting when making a mistake wiring according to the false wiring detection module, the metering result of power measurement module is corrected processing;
Electric energy metering module is used for obtaining active energy and reactive energy to carrying out integral and calculating through active-power P (m) and the reactive power Q (m) of correcting after processing.
Wherein, described false wiring detection module comprises:
Angle Measurement Module is used for input voltage
Figure BDA00000497709500000413
And input current
Figure BDA00000497709500000414
Between angle measure, obtain
Figure BDA00000497709500000415
Angle each other;
The amplitude measurement module is used for input voltage
Figure BDA00000497709500000416
And input current
Figure BDA00000497709500000417
Amplitude measure, obtain Amplitude;
The false wiring judge module is used for judging whether there is false wiring according to the angle of voltage, electric current and the polar plot of amplitude composition.
Compared with prior art, the present invention has following useful technique effect:
The present invention program completes more orthofunction of false wiring detection, measuring error automatically in computation chip inside.Therefore, adopt the present invention not need in-site measurement, according to the polar plot that electric energy computation chip provides, the discovery false wiring that grid company can be real-time, and dealing with problems at once, time saving and energy saving and efficient is very high.When detecting false wiring, computation chip can be corrected accurately according to the kind of false wiring, guarantees and the equal accurate metering of correct wiring, thereby avoid the maximum error that causes because of false wiring, avoided the legal dispute that causes because of the electric energy metrical mistake.In addition, detecting when having false wiring, do not needing to have a power failure and correct wiring or change electric energy meter, the power measurement that electric energy computation chip can be corrected a mistake automatically.
Description of drawings
Fig. 1 is the correct wiring schematic diagram of three-phase three-wire electric energy meter;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the structural representation of false wiring detection module in Fig. 2;
Fig. 4 is the structural representation of phase three-wire three active power metering module;
Fig. 5 is the structural representation of phase three-wire three reactive power metering module;
Fig. 6 is the correction principle schematic of phase three-wire three active power;
Fig. 7 is the correction principle schematic of phase three-wire three reactive power;
Fig. 8 is workflow schematic diagram of the present invention.
Embodiment
As shown in Figure 2, in three-phase three-wire electric energy meter (hereinafter to be referred as electric energy meter), electric energy computation chip comprises: the false wiring detection module; The power measurement module; Correct module; Electric energy metering module.The false wiring detection module provides complete voltage, current phasor figure for detection of the voltage, angle and the amplitude of electric current of input, for the detection of false wiring provides foundation; The power measurement module is used for voltage and current according to input and calculates active-power P ' (m) and reactive power Q ' (m); Correct module for the result according to the false wiring detection module, judge whether the metering result of power measurement module is corrected, and how to correct, if there is no false wiring is corrected module and can not corrected active power and reactive power; Electric energy metering module is used for correct active-power P (m) and reactive power Q (m) are carried out integral and calculating, obtains at last active energy and reactive energy.
In conjunction with shown in Figure 3, the false wiring detection module comprises: Angle Measurement Module, amplitude measurement module and false wiring judge module.
Wherein, the false wiring detection module realizes that the step of false wiring detection is as follows:
The first step, Angle Measurement Module is to input voltage
Figure BDA0000049770950000061
And input current
Figure BDA0000049770950000062
Between angle measure, obtain
Figure BDA0000049770950000063
Angle each other.
Second step, the amplitude measurement module is to input voltage And input current
Figure BDA0000049770950000065
Amplitude measure, obtain
Figure BDA0000049770950000066
Amplitude.
In the 3rd step, the false wiring judge module judges whether there is false wiring according to the angle of voltage, electric current and the polar plot of amplitude composition.Because false wiring is of a great variety, this false wiring judge module uses the hardware realization except electric energy computation chip is inner, can also judge voluntarily by choice for use software, then passes to electric energy computation chip with under judged result.
In addition, the power measurement module comprises meritorious power measurement module and reactive power metering module.Wherein, the principle schematic of active power metering module as shown in Figure 4.The step of active power metering is as follows:
The first step, input voltage
Figure BDA0000049770950000067
And input current
Figure BDA0000049770950000068
After turning through digital-to-analogue, sampled point is stored in sampled point register 410,412,411 and 413 respectively.
Second step, input voltage
Figure BDA0000049770950000069
And input current Sampled point in corresponding sampled point register 410 and 411 carries out multiplying as 2 inputs of multiplier 414, output P1 (m).Input voltage in like manner
Figure BDA0000049770950000071
And input current Sampled point in corresponding sampled point register 412 and 413 carries out multiplying as the input of multiplier 415, output P2 (m).
In the 3rd step, P1 (m) and P2 (m) carry out additive operation as the input of totalizer 416, export at last total active-power P (m).
In addition, the measuring principle schematic diagram of reactive power as shown in Figure 5, the step of reactive power metering is as follows:
The first step, input voltage
Figure BDA0000049770950000073
And input current
Figure BDA0000049770950000074
The phase shift of carrying out 90 ° as the input of 90 ° of wave filters 417 of phase shift is processed, in like manner input voltage
Figure BDA0000049770950000075
And input current
Figure BDA0000049770950000076
The phase shift of carrying out 90 ° as the input of 90 ° of wave filters 421 of phase shift is processed.
Second step, input voltage
Figure BDA0000049770950000077
And input current
Figure BDA0000049770950000078
Voltage and current sample point after processing through 90 ° of phase shifts is stored in sampled point register 418 and 419; Equally, input voltage
Figure BDA0000049770950000079
And input current
Figure BDA00000497709500000710
Be stored in sampled point register 422 and 423 as the sampled point after 90 ° of processing of phase shift.
In the 3rd step, the voltage and current sample point in sampled point register 418 and 419 carries out multiplying and exports Q1 (m) as the input of multiplier 420.In like manner, the voltage and current sample point in sampled point register 422 and 423 carries out multiplying and exports Q2 (m) as the input of multiplier 424.
In the 4th step, Q1 (m) and Q2 (m) carry out additive operation as the input of totalizer 425, export at last total reactive power Q (m).
When the relative angle of voltage and current rotates and after amplitude changed, the computing formula of its active power was as shown in (1-4).Formula (1-4) is resolved into form as shown in formula (4-1).In like manner the computing formula of reactive power (1-5) can be write as shown in formula (4-2).
Figure BDA0000049770950000081
Figure BDA0000049770950000082
Figure BDA0000049770950000083
Figure BDA0000049770950000084
Figure BDA0000049770950000085
Figure BDA0000049770950000086
Figure BDA0000049770950000087
Figure BDA0000049770950000088
As shown in formula (1-1), (1-2), P1 and P2 are (wherein,
Figure BDA00000497709500000810
) be the active power before the angle rotation, Q1 and Q2 are (wherein,
Figure BDA00000497709500000811
) be the reactive power before the angle rotation.Suppose,
Figure BDA00000497709500000813
Figure BDA00000497709500000814
Figure BDA00000497709500000816
Can be obtained by formula (4-1), (4-2): P ' 1=λ 1a 1P1-λ 1a 3Q1, P ' 2=λ 2a 2P2-λ 2a 4Q2, Q ' 1=λ 1a 1Q1+ λ 1a 3P1, Q ' 2=λ 2a 2Q2+ λ 2a 4P2.Can obtain P1 thus, P2, Q1, Q2 P ' 1, P ' 2, and Q ' 2, and the relational expression that Q ' 1 forms is as follows.
P 1 = a 1 P ′ 1 + a 3 Q ′ 1 λ 1 ( a 1 2 + a 3 2 ) , P 2 = a 2 P ′ 2 + a 4 Q ′ 2 λ 2 ( a 2 2 + a 4 2 ) , Q 1 = a 1 Q ′ 1 - a 3 P ′ 1 λ 1 ( a 1 2 + a 3 2 ) , Q 2 = a 2 Q ′ 2 - a 4 P ′ 2 λ 2 ( a 2 2 + a 4 2 ) .
Active power after can being corrected from above relational expression and the formula of reactive power are as shown in (4-3), (4-4).
P = P 1 + P 2 = a 1 P ′ 1 + a 3 Q ′ 1 λ 1 ( a 1 2 + a 3 2 ) + a 2 P ′ 2 + a 4 Q ′ 2 λ 2 ( a 2 2 + a 4 2 ) - - - ( 4 - 3 )
Q = Q 1 + Q 2 = a 1 Q ′ 1 - a 3 P ′ 1 λ 1 ( a 1 2 + a 3 2 ) + a 2 Q ′ 2 - a 4 P ′ 2 λ 2 ( a 2 2 + a 4 2 ) - - - ( 4 - 4 )
If correction coefficient
Figure BDA00000497709500000823
Figure BDA00000497709500000824
Figure BDA00000497709500000825
Figure BDA00000497709500000826
(4-3), (4-4) can be write as shown in formula (4-5).
P = Coff _ AP ′ 1 + Coff _ BQ ′ 1 + Coff _ CP ′ 2 + Coff _ DQ ′ 2 Q = Coff _ AQ ′ 1 - Coff _ BP ′ 1 + Coff _ CQ ′ 2 - Coff _ DP ′ 2 - - - ( 4 - 5 )
Whether as shown in Figure 6, correct module corrects active power and reactive power according to result or the user software Instruction Selection of false wiring detection module.If there is no the situation of false wiring does not just correct the result in the power measurement module.If there is the situation of false wiring, corrects module and just the metering result in the power measurement module is corrected.The correction step of active power is as follows:
The first step, the P ' 1 (m) in the power measurement module and P ' 2 (m) correct computing as the input of correcting module.P ' 1 (m) is input in multiplier 426 and carries out multiplication mutually with correction coefficient Coff_A, and P ' 2 (m) is input in multiplier 428 and carries out multiplication mutually with correction coefficient Coff_C.
Second step is input to the Output rusults of multiplier 426 in totalizer 427 and Coff_BQ ' 1 (m) carries out additive operation, the P1 that obtains correcting (m); Be input to the Output rusults of multiplier 428 in totalizer 429 and Coff_DQ ' 2 (m) carries out additive operation, the P2 that obtains correcting (m).
In the 3rd step, the Output rusults P2 (m) of the Output rusults P1 (m) of totalizer 427 and totalizer 429 is outputed to carry out total active-power P (m) that additive operation obtains correcting in totalizer 430.
Can obtain by formula (4-5) schematic diagram that in this programme, reactive power is corrected, as shown in Figure 7.The correction step of reactive power is as follows:
The first step, the Q ' 1 (m) in the power measurement module and Q ' 2 (m) correct computing as the input of correcting module.Q ' 1 (m) is input in multiplier 431 carries out multiplication mutually with correction coefficient Coff_A, Q ' 2 (m) is input in multiplier 433 carries out multiplication mutually with correction coefficient Coff_C.
Second step passes to the Output rusults of multiplier 431 in subtracter 432 and Coff_BP ' 1 (m) carries out subtraction, the Q1 that obtains correcting (m).Pass to the Output rusults of multiplier 433 in subtracter 434 and Coff_DP ' 2 (m) carries out subtraction, the Q2 that obtains correcting (m).
The 3rd step, the Output rusults Q2 (m) of the Output rusults Q1 (m) of subtracter 432 and subtracter 434 is passed to carry out additive operation in totalizer 435, obtain at last total reactive power Q (m) of correcting.
The course of work of the present invention as shown in Figure 8.Concrete steps are as follows.
Step S1 carries out power measurement to voltage and the input current of inputting.
Step S2, false wiring detects.The false wiring detecting step is measured angle and amplitude according to voltage and the input current of input, and the polar plot that forms according to angle and amplitude judges whether to exist false wiring.
Step S3 judges whether to exist false wiring, and if there is no false wiring just enters step S5 and carries out electric energy metrical.This deterministic process can be completed by electric energy computation chip, also can be completed by electric energy meter software or the long-range master control of grid company.If exist false wiring just to enter step S4.
Step S4 corrects active power and reactive power.
Step S5 completes electric energy metrical, then exports correct Electric energy measurement.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.

Claims (3)

1. the method for a correcting metering of three-phase three-wire false wiring, is characterized in that, comprises step:
The voltage of input and input current are carried out active-power P ' (m) and reactive power Q ' (m) measure;
Measure angle and amplitude according to voltage and the input current of input, the polar plot that forms according to angle and amplitude judges whether to exist false wiring, if there is false wiring, active power and reactive power is corrected;
Complete electric energy metrical, the output Electric energy measurement;
Described step to active-power P ' (m) correct comprises:
Will be according to input voltage And input current
Figure FDA00002416023600012
Multiplying each other to process obtains the first active-power P ' 1 (m) and correction coefficient Coff_A phase multiplication, operation result and Coff_BQ ' 1 (m) is carried out additive operation, the first active-power P 1 (m) that obtains correcting;
With input voltage
Figure FDA00002416023600013
And input current
Figure FDA00002416023600014
Multiply each other the second active-power P of process obtaining ' 2 (m) with carry out the phase multiplication with correction coefficient Coff_C, operation result and Coff_DQ ' 2 (m) are carried out additive operation, the second active-power P 2 (m) that obtains correcting;
The first active-power P 1 (m) of correcting and the second active-power P 2 (m) of correcting are carried out the active-power P (m) that additive operation obtains correcting;
Wherein, Q ' 1 (m) is the first reactive power, equals input voltage
Figure FDA00002416023600015
And input current
Figure FDA00002416023600016
The result that multiplies each other after processing through 90 ° of phase shifts; Q ' 2 (m) is the second reactive power, equals input voltage
Figure FDA00002416023600017
And input current
Figure FDA00002416023600018
As the result that multiplies each other after 90 ° of processing of phase shift; Correction coefficient
Figure FDA00002416023600019
Correction coefficient Coff _ B = a 3 λ 1 ( a 1 2 + a 3 2 ) , Correction coefficient Coff _ C = a 2 λ 2 ( a 2 2 + a 4 2 ) , Correction coefficient Coff _ D = a 4 λ 2 ( a 2 2 + a 4 2 ) ,
Figure FDA000024160236000114
Figure FDA000024160236000115
Figure FDA000024160236000116
Figure FDA000024160236000117
Voltage during for false wiring
Figure FDA000024160236000118
And electric current
Figure FDA000024160236000119
The relative correct wiring of angle the time relative rotation angle that occurs,
Figure FDA00002416023600021
Voltage during for false wiring
Figure FDA00002416023600022
And electric current
Figure FDA00002416023600023
The relative correct wiring of angle the time relative rotation angle that occurs, λ 1And λ 2Be respectively the A phase and cause the variation factor of current amplitude with C due to false wiring;
Described step to reactive power Q ' (m) correct comprises:
With input voltage
Figure FDA00002416023600024
And input current
Figure FDA00002416023600025
The first reactive power Q that obtains through multiplying each other after 90 ° of phase shifts processing ' 1 (m) carries out the phase multiplication with correction coefficient Coff_A, and operation result is deducted Coff_BP ' 1 (m), obtains the first reactive power Q 1 (m) of correcting;
With input voltage
Figure FDA00002416023600026
And input current
Figure FDA00002416023600027
The second reactive power Q that obtains as multiplying each other after 90 ° of processing of phase shift ' 2 (m) carry out the phase multiplication with correction coefficient Coff_C, and operation result is deducted Coff_DP ' 2 (m), obtain the second reactive power Q 2 (m) of correcting;
The first reactive power Q 1 (m) of correcting and the second reactive power Q 2 (m) of correcting are carried out additive operation, obtain at last the reactive power Q (m) of correcting.
2. a kind of method of correcting metering of three-phase three-wire false wiring according to claim 1, it is characterized in that, described electric energy metrical is that the active-power P (m) that will correct and the reactive power Q (m) of correcting are carried out respectively integral and calculating, obtains active energy and reactive energy.
3. the device of a correcting metering of three-phase three-wire false wiring, is characterized in that, comprising:
The false wiring detection module, for detection of the voltage, angle and the amplitude of electric current of input, the polar plot that forms according to angle and amplitude judges whether to exist false wiring;
The power measurement module is used for calculating active-power P ' (m) and reactive power Q ' (m) according to the voltage of input and input current;
Correct module, be used for detecting when making a mistake wiring according to the false wiring detection module, the metering result of power measurement module is corrected processing;
Electric energy metering module is used for obtaining active energy and reactive energy to carrying out integral and calculating through active-power P (m) and the reactive power Q (m) of correcting after processing;
Described false wiring detection module comprises:
Angle Measurement Module is used for input voltage
Figure FDA00002416023600028
And input current Between angle measure, obtain
Figure FDA00002416023600031
Angle each other;
The amplitude measurement module is used for input voltage
Figure FDA00002416023600032
And input current
Figure FDA00002416023600033
Amplitude measure, obtain Amplitude;
The false wiring judge module is used for judging whether there is false wiring according to the angle of voltage, electric current and the polar plot of amplitude composition;
Described correction module comprises for the correction module of correcting active-power P ' (m) and is used for correcting the correction module of reactive power Q ' (m);
Described correction module for correcting active-power P ' (m) comprises:
The first multiplier (426), being used for will be according to input voltage
Figure FDA00002416023600035
And input current Multiply each other to process and obtain the first active-power P ' 1 (m) and correction coefficient Coff_A phase multiplication;
First adder (427) is used for operation result and the Coff_BQ ' 1 (m) of the first multiplier (426) are carried out additive operation, the first active-power P 1 (m) that obtains correcting;
The second multiplier (428) is used for input voltage And input current Multiply each other the second active-power P of process obtaining ' 2 (m) with carry out the phase multiplication with correction coefficient Coff_C;
Second adder (429) is used for operation result and the Coff_DQ ' 2 (m) of the second multiplier (428) are carried out additive operation, the second active-power P 2 (m) that obtains correcting;
The 3rd totalizer (430) is used for the first active-power P 1 (m) that will correct and the second active-power P 2 (m) of correcting and carries out the active-power P (m) that additive operation obtains correcting;
Wherein, Q ' 1 (m) is the first reactive power, equals input voltage
Figure FDA00002416023600039
And input current The result that multiplies each other after processing through 90 ° of phase shifts; Q ' 2 (m) is the second reactive power, equals input voltage
Figure FDA000024160236000311
And input current
Figure FDA000024160236000312
As the result that multiplies each other after 90 ° of processing of phase shift; Correction coefficient
Figure FDA000024160236000313
Correction coefficient Coff _ B = a 3 λ 1 ( a 1 2 + a 3 2 ) , Correction coefficient Coff _ C = a 2 λ 2 ( a 2 2 + a 4 2 ) , Correction coefficient
Coff _ D = a 4 λ 2 ( a 2 2 + a 4 2 ) ,
Figure FDA00002416023600042
Figure FDA00002416023600044
Figure FDA00002416023600045
Figure FDA00002416023600046
Voltage during for false wiring
Figure FDA00002416023600047
And electric current
Figure FDA00002416023600048
The relative correct wiring of angle the time relative rotation angle that occurs,
Figure FDA00002416023600049
Voltage during for false wiring
Figure FDA000024160236000410
And electric current
Figure FDA000024160236000411
The relative correct wiring of angle the time relative rotation angle that occurs, λ 1And λ 2Be respectively the A phase and cause the variation factor of current amplitude with C due to false wiring;
Described correction module for correcting reactive power Q ' (m) comprises:
The 3rd multiplier (431) is used for input voltage
Figure FDA000024160236000412
And input current
Figure FDA000024160236000413
The first reactive power Q that obtains through multiplying each other after 90 ° of phase shifts processing ' 1 (m) carries out the phase multiplication with correction coefficient Coff_A;
The first subtracter (432) is used for the operation result of the 3rd multiplier (431) is deducted Coff_BP ' 1 (m), obtains the first reactive power Q 1 (m) of correcting;
The 4th multiplier (433) is used for input voltage
Figure FDA000024160236000414
And input current
Figure FDA000024160236000415
The second reactive power Q that obtains as multiplying each other after 90 ° of processing of phase shift ' 2 (m) carry out the phase multiplication with correction coefficient Coff_C;
The second subtracter (434), be used for the 4th multiplier (433) operation result is deducted Coff_DP ' 2 (m), obtain the second reactive power Q 2 (m) of correcting;
The 4th totalizer (435) is used for the first reactive power Q 1 (m) that will correct and carried out additive operation with the second reactive power Q 2 (m) of correcting, obtains at last the reactive power Q (m) of correcting.
CN 201110058481 2011-03-11 2011-03-11 Device and method for correcting metering of three-phase three-wire false wiring Active CN102183706B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110058481 CN102183706B (en) 2011-03-11 2011-03-11 Device and method for correcting metering of three-phase three-wire false wiring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201110058481 CN102183706B (en) 2011-03-11 2011-03-11 Device and method for correcting metering of three-phase three-wire false wiring

Publications (2)

Publication Number Publication Date
CN102183706A CN102183706A (en) 2011-09-14
CN102183706B true CN102183706B (en) 2013-05-08

Family

ID=44569909

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201110058481 Active CN102183706B (en) 2011-03-11 2011-03-11 Device and method for correcting metering of three-phase three-wire false wiring

Country Status (1)

Country Link
CN (1) CN102183706B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102540136B (en) * 2012-02-16 2014-07-30 钜泉光电科技(上海)股份有限公司 Method and device for quickly correcting phase error of energy meter
CN102735986B (en) * 2012-07-02 2014-06-25 安徽中兴继远信息技术股份有限公司 Method for rapidly judging wiring error of power distribution transformer monitoring terminal
CN102981100A (en) * 2012-12-12 2013-03-20 上海市电力公司 Judgment method for misconnection of three-phase three-wire electric energy meter
CN103293353A (en) * 2012-12-28 2013-09-11 铨盛电子股份有限公司 Intelligent type multifunctional digital electric meter and application judging method thereof
CN106569084B (en) * 2016-11-15 2019-04-02 杭州普安科技有限公司 A kind of controllable characteristics load for the detection of cable wiring accuracy
CN108445438B (en) * 2018-03-23 2021-10-15 国网河北省电力有限公司电力科学研究院 Method and device for detecting wrong wiring of electric energy metering device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2085972U (en) * 1991-01-15 1991-10-02 刘运中 Phase-interruption time-meter for three-phase electric meter
DE102004010707B4 (en) * 2004-03-04 2013-08-22 Austriamicrosystems Ag Energy meter arrangement and method for calibration
CN101281693B (en) * 2007-12-29 2011-05-18 重庆电力高级技工学校 Device for simulating false wiring of electric energy metering equipment

Also Published As

Publication number Publication date
CN102183706A (en) 2011-09-14

Similar Documents

Publication Publication Date Title
CN102183706B (en) Device and method for correcting metering of three-phase three-wire false wiring
CN202281802U (en) Three-phase three-wire electric energy meter
CN101807795B (en) Method for forming electric energy metering simulation system and device thereof
CN102692556B (en) A kind of three-phase electricity amount computing method and device
CN102594250B (en) control method of maximum torque per ampere vector control system for position sensor-free internal permanent magnet synchronous motor
CN104038134B (en) A kind of permanent-magnet synchronous motor rotor position error calibration method based on linear Hall
CN107577870A (en) The distribution network voltage power sensitivity robust estimation method measured based on synchronized phasor
TWI479159B (en) Method for estimating voltage stability
CN109633262A (en) Three phase harmonic electric energy gauging method, device based on composite window multiline FFT
CN108155643B (en) A kind of robust estimation method of the single-phase mains voltage parameter based on sliding mode observer
CN203287435U (en) A micro electrical network harmonic wave and inter-harmonic wave test apparatus based on an STM32F107VCT6
CN113675850B (en) Power grid information rapid and accurate sensing method based on nonlinear robust estimation
CN102420427A (en) Method for calculating voltage stability margin of regional power grid by considering outer network equivalence
CN103499737A (en) Method for obtaining false-wiring back-fill electric quantity of three-phase three-wire electric energy meter
CN102590618A (en) Detection method of positive sequence voltage phase of fundamental wave for power grid
CN102998523A (en) Harmonic power calculating method for electric energy measuring
CN104133189B (en) Method and device for detecting electric quantity return and supplement error at voltage loss of one phase of three-phase four-wire electric energy meter
CN102427248B (en) Direct-driven wind power synchronization control method based on Buck-Boost matrix converter
CN201876538U (en) Transformer calibrator
CN102095958A (en) Method for analyzing wiring correctness of double-winding conventional transformer single-switch differential protection CT
CN107271772B (en) A kind of mains frequency rapid detection method of high-precision and anti-noise jamming
CN104330644A (en) Method and system for detecting amplitude value of sine wave signal in power system
CN103293363A (en) Time delay compensation method for mutual inductor sampling value
CN105429629A (en) Phase locking method based on FPGA and phase-locked loop adopting same
CN104133188A (en) Method and device for detecting electric quantity return and supplement error at voltage loss of two phases of three-phase four-wire electric energy meter

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: SHENZHEN RUINENG MICRO-TECHNOLOGY CO., LTD.

Free format text: FORMER NAME: SHENZHEN RENERGY TECHNOLOGY CO.,LTD.

CP01 Change in the name or title of a patent holder

Address after: 518000 Guangdong city of Shenzhen province Nanshan District South Road No. 97 Huaying building room A201

Patentee after: Shenzhen ruineg micro Polytron Technologies Inc

Address before: 518000 Guangdong city of Shenzhen province Nanshan District South Road No. 97 Huaying building room A201

Patentee before: Shenzhen Renergy Technology Co.,Ltd.

CP03 Change of name, title or address

Address after: 518000 Shenzhen, Guangdong, Nanshan District Haitian Road, No. 13 Shenzhen software industry base 5B-401

Patentee after: Shenzhen Renergy Technology Co.,Ltd.

Address before: 518000 Guangdong city of Shenzhen province Nanshan District South Road No. 97 Huaying building room A201

Patentee before: Shenzhen ruineg micro Polytron Technologies Inc

CP03 Change of name, title or address