CN109557496A - A kind of correction method of electric energy meter - Google Patents

A kind of correction method of electric energy meter Download PDF

Info

Publication number
CN109557496A
CN109557496A CN201710890937.4A CN201710890937A CN109557496A CN 109557496 A CN109557496 A CN 109557496A CN 201710890937 A CN201710890937 A CN 201710890937A CN 109557496 A CN109557496 A CN 109557496A
Authority
CN
China
Prior art keywords
electric energy
energy meter
power
gain
correction
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.)
Pending
Application number
CN201710890937.4A
Other languages
Chinese (zh)
Inventor
叶金挺
王杭挺
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.)
Ningbo Sanxing Electric Co Ltd
Ningbo Sanxing Medical and Electric Co Ltd
Original Assignee
Ningbo Sanxing Medical and Electric 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 Ningbo Sanxing Medical and Electric Co Ltd filed Critical Ningbo Sanxing Medical and Electric Co Ltd
Priority to CN201710890937.4A priority Critical patent/CN109557496A/en
Publication of CN109557496A publication Critical patent/CN109557496A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00Testing or calibrating of apparatus covered by the preceding groups
    • G01R35/04Testing or calibrating of apparatus covered by the preceding groups of instruments for measuring time integral of power or current

Abstract

A kind of correction method of electric energy meter, electric energy meter computation chip is powered using power source, initialize electric energy meter computation chip measuring parameter, read electric current, active power and the reactive power of electric energy meter to be calibrated, reading n times respectively, results are averaged, is stored in obtained average value as current offset, active power biasing and reactive power biasing in corresponding calibration register;Change power source to be powered, calculates voltage gain ZU, current gain ZI, power gain K and angular difference Δ θ, and be stored in corresponding register and calibrated.Compared with the prior art, the advantages of the present invention are as follows: compared with traditional auto-adjustment scheme, correction method of the invention reduces a liter source number, and initiation parameter and bias are calibrated together;Voltage, electric current, power gain, phase merging verify together, and only need to rise source twice can be completed the calibration of electric energy meter, shortens the calibration time, improves calibration efficiency.

Description

A kind of correction method of electric energy meter
Technical field
The present invention relates to electric energy meter technical fields, more particularly, to a kind of correction method of electric energy meter.
Background technique
Electric energy meter is required to contrast standard electric energy meter before factory and is corrected, so that the electric energy meter after factory can satisfy The requirement of corresponding measurement precision, since the measuring accuracy of electric energy meter depends on the voltage measurement stored in metering chip register ginseng Number, electric current measuring parameter and power measurement parameter, therefore, electric energy meter correction just include voltage measurement parameter, electric current measuring parameter With the correction of power measurement parameter, the specially calibration of voltage gain, current gain, power gain, power bias and phase.? In traditional auto-adjustment scheme, liter source four times are needed, initialization is carried out in two steps calibration with biasing, and voltage, electric current, power increase Benefit is calibrated in two steps with phase, and the plenty of time is wasted in waiting in traditional calibration, and time-consuming for calibration, low efficiency.
There is the Chinese invention patent of Patent No. ZL201410610158.0 (Publication No. CN104297717A) to disclose A kind of electric energy meter bearing calibration, system and electric energy meter, after the initialization operation for completing electric energy meter computation chip;Obtain electric energy meter Between the voltage and current virtual value for measuring obtained voltage and current virtual value, and being measured according to electric energy meter and standard scale platform Difference, calculate and into the register of electric energy meter computation chip be written voltage and current measuring parameter corrected value;Later, The performance number that electric energy meter measures under the electric meter constant of standard scale platform is obtained, and is measured according to electric energy meter and standard scale platform Difference between the performance number arrived, calculate and into the register of electric energy meter computation chip write power measuring parameter corrected value, The invention can carry out the correction of three phase metering parameter simultaneously, without being corrected by several times by cut phase, but root in the invention Difference between the voltage and current virtual value measured according to electric energy meter and standard scale platform carries out calculating voltage and current metering ginseng Several corrected values needs just obtain accurate corrected value by repeatedly measuring, needs to consume the plenty of time.
The Chinese invention patent of another Patent No. ZL200610062976.7 (Publication No. CN101153900B) discloses The calibration method and system of a kind of electric energy meter calibrates console according to calibration steps control after the completion of the initialization of school electric energy meter The output of power source processed reads the calibration parameter that standard electric energy meter is generated according to the output of the power source, to by school electric energy meter Send calibration command frame, the calibration command frame carries the calibration parameter and calibration steps and identifies, the calibration steps according to Secondary is power gain calibration, phase alignment and voltage, correcting current;The invention alignment console sends school to by school electric energy meter Quasi- parameter, the calibration Parameters Calculation error compensation coefficient provided by school electric energy meter according to calibration console, and mended according to the error It repays coefficient to calibrate itself, improves the reliability and accuracy of electric energy meter calibration;But base calibration, function in the invention Rate gain calibration, phase alignment and voltage, correcting current are divided into four step calibrations, and the calibration time is long, and power is lower.
Summary of the invention
The technical problem to be solved by the present invention is to provide for the above-mentioned state of the art, a kind of calibration time-consuming is short, efficiency High electric energy meter calibrating method.
The technical scheme of the invention to solve the technical problem is: a kind of correction method of electric energy meter, feature It is: the following steps are included:
Step (1) carries out basic parameter setting to electric energy meter computation chip to be calibrated;
After the completion of step (2), chip basis parameter setting, electric energy meter computation chip is powered using power source, just Beginningization electric energy meter computation chip measuring parameter reads electric current, active power and the reactive power of electric energy meter to be calibrated, reads respectively Taking n times, results are averaged, deposits obtained average value as current offset, active power biasing and reactive power biasing It is placed in corresponding calibration register;N is natural number;
Step (3) changes the step power source in (2) and is powered, and reads the voltage value U of electric energy meter to be calibrated2, electric current Value I2, active power value P2With reactive power value Q2, and the voltage value U with the standard electric energy meter under the same terms1, current value I1、 Active power value P1With reactive power value Q1It is compared, calculates voltage gain ZU, current gain ZI, power gain K and angular difference Δ θ, and the voltage gain Z that will be obtained respectivelyU, current gain ZI, power gain K and angular difference Δ θ be stored in it is complete in corresponding register At calibration.
Specifically, initializing measuring parameter condition in step (2) are as follows: shunt running thresholding, power bias, current offset are set as 0, voltage gain, current gain, power gain correction use as default.
Further, the output of power source used in step (2) are as follows: PF=1.0, U=Un, I=0
Wherein PF is power factor, and U is voltage, UnFor electric energy meter voltage rating, I is electric current.
Further, the output of the power source used in step (3) are as follows: PF=0.5L, U=Un, I=Ib
Wherein IbFor electric energy meter rated current, L is inductive load.
Specifically, the voltage gain Z in step (3)UCalculation formula are as follows:
Specifically, the current gain Z in step (3)ICalculation formula are as follows:
Specifically, in step (3) power gain K correction calculation formula are as follows:
Wherein K1For the original upper gain of known electric energy meter to be calibrated;K is after electric energy meter to be calibrated corrects Power gain.
Specifically, the correction calculation formula of angular difference are as follows:
Wherein Δ θ1For the original angular difference of known electric energy meter to be calibrated;Δ θ is after electric energy meter to be calibrated corrects Angular difference.
Compared with the prior art, the advantages of the present invention are as follows: compared with traditional auto-adjustment scheme, calibration side of the invention Method reduces a liter source number, and initiation parameter and bias are calibrated together;Voltage, electric current, power gain, phase merge It verifies together, only need to rise source twice can be completed the calibration of electric energy meter, shortens the calibration time, improves calibration efficiency.
Detailed description of the invention
Fig. 1 is lieutenant colonel of embodiment of the present invention table flow chart.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in Figure 1, a kind of correction method of electric energy meter the following steps are included:
Step (1) carries out basic parameter setting to electric energy meter computation chip to be calibrated;Mode is matched in the present embodiment It sets, channel gain, EMU unit, high-frequency impulse, decompression threshold values, startup threshold values carry out parameter setting;
After the completion of step (2), chip basis parameter setting, electric energy meter computation chip is powered using power source, function The output in rate source are as follows: PF=1.0, U=Un, I=0.Wherein PF is power factor, and U is voltage, UnFor electric energy meter voltage rating, I For electric current, and electric energy meter computation chip measuring parameter is initialized, sets 0 for shunt running thresholding, power bias, current offset, electricity Pressure gain, current gain, power gain correction use as default;Rule of thumb default settings in the present embodiment;Read to Electric current, active power and the reactive power of the electric energy meter of calibration, reading n times respectively, results are averaged, the average value that will be obtained It is stored in corresponding calibration register respectively as current offset, active power biasing and reactive power biasing;N is nature Number;N=10 in the present embodiment;
Step (3) changes the step power source in (2) and is powered, the output of power source are as follows: PF=0.5L, U=Un, I =IbWherein IbFor electric energy meter rated current, L is inductive load;Read the voltage value U of electric energy meter to be calibrated2, current value I2、 Active power value P2With reactive power value Q2, and the voltage value U with the standard electric energy meter under the same terms1, current value I1, it is active Performance number P1With reactive power value Q1It is compared, calculates voltage gain ZU, current gain ZI, power gain K and angular difference Δ θ, electricity Press gain ZUCalculation formula are as follows:
Current gain ZICalculation formula are as follows:
The correction calculation formula of power gain K are as follows:
Wherein K1For the original upper gain of known electric energy meter to be calibrated;K is after electric energy meter to be calibrated corrects Power gain;
The correction calculation formula of angular difference are as follows:
Wherein Δ θ1For the original angular difference of known electric energy meter to be calibrated;Δ θ is after electric energy meter to be calibrated corrects Angular difference;
The voltage gain Z that will be obtained respectivelyU, current gain ZI, power gain K and angular difference Δ θ be stored in corresponding register Middle completion calibration.
It is tested in the present embodiment using single-phase intelligent ammeter, liter source 4 times is needed in traditional calibration scheme, are divided into as follows Step:
Step a, the output of power source are as follows: PF=1.0, U=Un, when I=0 carries out initialization electric energy meter computation chip metering Parameter;
Step b, the output of power source are as follows: PF=1.0, U=Un, I=IbShi Jinhang voltage gain, current gain and power The calibration of gain;
Step c, the output of power source are as follows: PF=1.0, U=Un, carry out when I=0 current offset, active power biasing and The calibration of reactive power biasing;
Step d, the output of power source are as follows: PF=0.5L, U=Un, I=IbThe calibration of Shi Jinhang angular difference.
Following table gives scheme in the present embodiment and needs liter source 4 times in traditional calibration scheme compared with traditional calibration scheme, And this calibration scheme need to only rise source 2 times, therefore rise the duration that source time shortens 50%.
Calibration is carried out to same single-phase intelligent ammeter respectively with traditional calibration scheme using the scheme in the present embodiment, it is time-consuming Time as shown in following table, this calibration scheme improved efficiency 46.9%.

Claims (8)

1. a kind of correction method of electric energy meter, it is characterised in that: the following steps are included:
Step (1) carries out basic parameter setting to electric energy meter computation chip to be calibrated;
After the completion of step (2), chip basis parameter setting, electric energy meter computation chip is powered using power source, is initialized Electric energy meter computation chip measuring parameter reads electric current, active power and the reactive power of electric energy meter to be calibrated, reads N respectively Secondary results are averaged, stores obtained average value as current offset, active power biasing and reactive power biasing In corresponding calibration register;N is natural number;
Step (3) changes the step power source in (2) and is powered, and reads the voltage value U of electric energy meter to be calibrated2, current value I2、 Active power value P2With reactive power value Q2, and the voltage value U with the standard electric energy meter under the same terms1, current value I1, it is active Performance number P1With reactive power value Q1It is compared, calculates voltage gain ZU, current gain ZI, power gain K and angular difference Δ θ, and The voltage gain Z that will be obtained respectivelyU, current gain ZI, power gain K and angular difference Δ θ be stored in corresponding register and complete school It is quasi-.
2. the correction method of electric energy meter according to claim 1, it is characterised in that: initialize measuring parameter in step (2) Condition are as follows: shunt running thresholding, power bias, current offset are set as 0, and voltage gain, current gain, power gain correction are set as Default value.
3. the correction method of electric energy meter according to claim 1, it is characterised in that: power source used in step (2) Output are as follows: PF=1.0, U=Un, I=0
Wherein PF is power factor, and U is voltage, UnFor electric energy meter voltage rating, I is electric current.
4. the correction method of electric energy meter according to claim 1, it is characterised in that: the power source used in step (3) Output are as follows: PF=0.5L, U=Un, I=Ib
Wherein IbFor electric energy meter rated current, L is inductive load.
5. the correction method of electric energy meter according to claim 1, it is characterised in that: the voltage gain Z in step (3)UMeter Calculate formula are as follows:
6. the correction method of electric energy meter according to claim 1, it is characterised in that: the current gain Z in step (3)IMeter Calculate formula are as follows:
7. the correction method of electric energy meter according to claim 1, it is characterised in that: the correction of power gain K in step (3) Calculation formula are as follows:
Wherein K1For the original upper gain of known electric energy meter to be calibrated;K is that the power after electric energy meter correction to be calibrated increases Benefit.
8. the correction method of electric energy meter according to claim 7, it is characterised in that: the correction calculation formula of angular difference are as follows:
Wherein Δ θ1For the original angular difference of known electric energy meter to be calibrated;Δ θ is the angular difference after electric energy meter correction to be calibrated.
CN201710890937.4A 2017-09-27 2017-09-27 A kind of correction method of electric energy meter Pending CN109557496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710890937.4A CN109557496A (en) 2017-09-27 2017-09-27 A kind of correction method of electric energy meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710890937.4A CN109557496A (en) 2017-09-27 2017-09-27 A kind of correction method of electric energy meter

Publications (1)

Publication Number Publication Date
CN109557496A true CN109557496A (en) 2019-04-02

Family

ID=65863967

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710890937.4A Pending CN109557496A (en) 2017-09-27 2017-09-27 A kind of correction method of electric energy meter

Country Status (1)

Country Link
CN (1) CN109557496A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102253358A (en) * 2011-04-21 2011-11-23 深圳市锐能微科技有限公司 Method for correcting electric energy meter by using correction system, and correction system
CN202196119U (en) * 2011-09-15 2012-04-18 无锡华润矽科微电子有限公司 Single-phase multifunctional electric energy metering circuit
CN102520386A (en) * 2011-12-12 2012-06-27 宁夏隆基宁光仪表有限公司 Calibration method of three-phase electric energy meter
CN102680936A (en) * 2012-04-24 2012-09-19 扬州市万泰电器厂有限公司 Simple and convenient autonomic and automatic meter adjustment method
CN103885026A (en) * 2014-03-13 2014-06-25 威胜集团有限公司 Electric energy meter calibrating method
CN104297717A (en) * 2014-11-03 2015-01-21 青岛世泽电子仪表有限公司 Electric energy meter correction method and system and electric energy meter
CN105242233A (en) * 2015-10-21 2016-01-13 宁波三星医疗电气股份有限公司 Fast calibration method of single-phase electric energy meter
CN105388445A (en) * 2015-10-21 2016-03-09 宁波三星医疗电气股份有限公司 Automatic meter calibration method for single-phase electric energy meter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102253358A (en) * 2011-04-21 2011-11-23 深圳市锐能微科技有限公司 Method for correcting electric energy meter by using correction system, and correction system
CN202196119U (en) * 2011-09-15 2012-04-18 无锡华润矽科微电子有限公司 Single-phase multifunctional electric energy metering circuit
CN102520386A (en) * 2011-12-12 2012-06-27 宁夏隆基宁光仪表有限公司 Calibration method of three-phase electric energy meter
CN102680936A (en) * 2012-04-24 2012-09-19 扬州市万泰电器厂有限公司 Simple and convenient autonomic and automatic meter adjustment method
CN103885026A (en) * 2014-03-13 2014-06-25 威胜集团有限公司 Electric energy meter calibrating method
CN104297717A (en) * 2014-11-03 2015-01-21 青岛世泽电子仪表有限公司 Electric energy meter correction method and system and electric energy meter
CN105242233A (en) * 2015-10-21 2016-01-13 宁波三星医疗电气股份有限公司 Fast calibration method of single-phase electric energy meter
CN105388445A (en) * 2015-10-21 2016-03-09 宁波三星医疗电气股份有限公司 Automatic meter calibration method for single-phase electric energy meter

Similar Documents

Publication Publication Date Title
CN104296919B (en) A kind of non-linear compensation circuit of resistance bridge type sensor
US8851105B2 (en) Mass flow meter, mass flow controller, mass flow meter system and mass flow control system containing the mass flow meter and the mass flow controller
CN103443646B (en) Intelligent electronic device and calibration steps thereof and apparatus of electrical monitoring equipment
CN101865986B (en) System and method for checking error of high-voltage electric energy measurement device
CN100541207C (en) The characteristic of impedance of determining complex impedance element is so that the metering circuit of the sign of its impedance and method
CN101621810B (en) Received signal strength indication detector and method for calibrating received signal strength indication
CN101303401B (en) RTC regulating apparatus of electrical energy meter and RTC automatic compensation correcting method
US7305310B2 (en) System and method for compensating for potential and current transformers in energy meters
CN103048087B (en) Pressure sensor debugging system and debugging method thereof
CN102610996B (en) Method and device for rapidly calibrating luminous power
WO2007010691A1 (en) Method and device for detecting charged state of battery
CN102435392B (en) Remote intelligent pressure sensor calibration system
CN103278264B (en) A kind of calibration steps of surface source blackbody temperature accuracy and calibration system thereof
CN103885026B (en) Electric energy meter calibrating method
WO2011011255A2 (en) Upstream volume mass flow verification systems and methods
CN103091552B (en) Pre-calibrated electric energy metering circuit and calibration steps
CN104808168A (en) Rapid electric energy meter verification method based on segmented current technology
CN108535651B (en) Method and apparatus for calibrating coulomb count based state of charge estimation
CN105891727B (en) A kind of method of estimation and system of the power battery charged state of double structure changes filtering
CN100536320C (en) Self-adaptive grid-voltage compensator and its compensation
CN105352487A (en) Calibration method for precision of attitude measurement system
CN102279376A (en) Method for calibrating two-port vector network analyzer based on ten-error model
US7924088B1 (en) Offset voltage calibration method and apparatus and amplifier thereof
US10794731B2 (en) System and method for detecting position of device and position detection module
CN105242233B (en) A kind of quick correction method of single-phase electric energy meter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination