CN106872927A - The assay method and error analysis method of the harmonic wave degree of accuracy of electronic type voltage transformer - Google Patents
The assay method and error analysis method of the harmonic wave degree of accuracy of electronic type voltage transformer Download PDFInfo
- Publication number
- CN106872927A CN106872927A CN201710083591.7A CN201710083591A CN106872927A CN 106872927 A CN106872927 A CN 106872927A CN 201710083591 A CN201710083591 A CN 201710083591A CN 106872927 A CN106872927 A CN 106872927A
- Authority
- CN
- China
- Prior art keywords
- electronic type
- voltage transformer
- accuracy
- error
- type voltage
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Abstract
The invention discloses a kind of assay method of the electronic type voltage transformer harmonic wave degree of accuracy, first, the high-pressure side of capacitive divider is in parallel with the primary side of electronic type voltage transformer to be measured, and apply harmonic voltage, data processing unit carries out Fourier transform to the data signal of the two, obtain its frequency spectrum, including amplitude spectrum and phase spectrum；On the basis of the data signal of capacitive divider, the amplitude error and phase angle difference of electronic type voltage transformer data signal to be measured are calculated, obtain the harmonic wave degree of accuracy of the electronic type voltage transformer to be measured.The harmonic wave degree of accuracy of the achievable electronic type voltage transformer of the present invention is integrally verified, and meets electronic mutual inductor type approval test demand, and the harmonic measure ability of electronic type voltage transformer is detected authentic and validly.
Description
Technical field
It is a kind of electronic type voltage transformer harmonic wave degree of accuracy specifically the present invention relates to harmonic measure technical field
Assay method and error analysis method.
Background technology
Due to the use of special device (nonlinear-load, flexible AC transmitting system, track traffic), can be produced on power network
Harmonic wave.Harmonic content is relevant with power network and voltage level.Harmonic wave all has an impact to metering, quality measurement and relay protection.
Electronic mutual inductor is used for system measurements or protection, is the core parts of power network.Its harmonic response characteristic is harmonic wave
The key factor of accurate measurement.Therefore, the harmonic characterisitic to electronic mutual inductor detects, grasps its harmonic response performance tool
There is important theory significance and practice significance.
Electronic mutual inductor standard GB/T 20840.8-2007 and IEC60044-8：The 2002 pairs of electronic mutual inductors it is humorous
The ripple degree of accuracy（The harmonic measure degree of accuracy）Propose requirement.In standard GB/T20840.8-2007 appendix Cs C.4, for electronics
The harmonic measure class of accuracy of formula voltage transformer, power measurement, quality measurement and relay protection are divided into according to its purposes.Wherein,
When to harmonic wave accuracy requirement highest being for power measurement, harmonic wave accuracy requirement during power measurement is as shown in Figure 1.Press
According to the requirement of measurement verification regulations, determining the actual error of device should be not more than the 1/5 of tested test product error limit, with reference to Fig. 1
Data be computed obtaining, the harmonic wave degree of accuracy to electronic type voltage transformer be measured measure device error limit,
As shown in Figure 2.
At this stage, the measure device or method that the harmonic wave degree of accuracy to electronic type voltage transformer is measured are not deposited still
The measure of the harmonic wave degree of accuracy of electronic type voltage transformer is not yet carried out.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of measure side of the harmonic wave degree of accuracy of electronic type voltage transformer
Method, the harmonic wave degree of accuracy for being capable of achieving electronic type voltage transformer is integrally verified, and meets electronic mutual inductor type approval test requirement, very
The real harmonic response characteristic for effectively detecting electronic type voltage transformer.Meanwhile, propose according to the survey made by the assay method
Determine the error analysis method of device.
In order to solve the above-mentioned technical problem, a kind of assay method of the electronic type voltage transformer harmonic wave degree of accuracy, including with
Lower step：
A：The high-pressure side of capacitive divider is in parallel with the primary side of electronic type voltage transformer to be measured, and apply harmonic voltage；
B：The capacitive divider low-pressure side is connected and output voltage signal with voltage follower, by voltage signal conversion
It is the first data signal and input data processing unit；
C：By the second data signal input data processing unit of the electronic type voltage transformer output to be measured；
D：The data processing unit carries out Fourier transform to first data signal and the second data signal, obtains it frequently
Spectrum, including amplitude spectrum and phase spectrum；On the basis of the first data signal, calculate second data signal amplitude error and
Phase angle difference, obtains the harmonic wave degree of accuracy of the electronic type voltage transformer to be measured.
Further, also include after the step C, the first numeral letter of same time is obtained using clock synchronization circuit
Number and the second data signal.
Further, the step B, is converted to by High Precision Multimeter or data collecting card by the voltage signal
One data signal.
Further, the synchronised clock is crystal oscillator DSA321SCA high.
Further, the data processing unit is PC.
Further, the capacitive divider is made up of two standard capacitances.
Due to existing harmonic standard system, it is impossible to carry out tracing to the source for high-tension harmonic measure standard, the present invention is provided
A kind of error analysis method of the measure device of electronic type voltage transformer harmonic wave degree of accuracy, the measure device is with electric capacity point
Depressor is standard block with voltage follower, measures the harmonic characterisitic of electronic type voltage transformer, and the error analysis method is used
In it is determined that the precision for determining device, the error analysis method is, by the capacitive divider and the voltage follower
Error trace to the source respectively.
Comprise the following steps：
a：Global error is analyzed；
b：The analysis on Uncertainty of global error.
Wherein, the step a includes：
a1：Determine capacitive divider error；
a2：Determine voltage follower error；
a3：Capacitive divider error is synthesized with voltage follower error, global error is obtained.
The step b includes：
b1：It is determined that the partial uncertainty introduced by LCR electric bridges;
b2：It is determined that the partial uncertainty introduced by check system；
b3：It is determined that the partial uncertainty introduced by external electromagnetic field；
b4：The uncertainty that b1 ~ b3 is obtained is synthesized, the uncertainty of global error is obtained.
The beneficial effect of the assay method of the electronic type voltage transformer harmonic wave degree of accuracy of the invention：
1. under frequency 100Hz~650Hz, the assay method energy of the harmonic wave degree of accuracy to electronic type voltage transformer set up
Enough meet standard GB/T 20840.8-2007 and IEC60044-8：2002 requirement, the harmonic wave to electronic type voltage transformer is accurate
Exactness is measured, and the measurement parameter specified according to standard, and the ability of measure can cover below withstanding voltage 1000kV
Electronic type voltage transformer product；
2. the deficiency of domestic detection means is compensate for, the harmonic wave degree of accuracy to electronic type voltage transformer claims, excavate electricity
Function of the minor voltage transformer at aspects such as harmonic power metering, quality measurements.
3., according to the principle of the assay method, the harmonic wave that this method can also be used for other kinds of voltage transformer is accurate
Degree is determined.
Brief description of the drawings
Harmonic wave accuracy requirement when Fig. 1 is electronic mutual inductor power measurement；
Fig. 2 is the error limit to the measure device of the electronic mutual inductor harmonic wave degree of accuracy；
Fig. 3 is the structural representation of electronic mutual inductor；
Fig. 4 is an assay device structures schematic diagram of the electronic type voltage transformer harmonic wave degree of accuracy of the present invention；
Fig. 5 is the workflow diagram of the assay method of the electronic type voltage transformer harmonic wave degree of accuracy of the present invention；
Assay method carries out the mode figure of tracing to the source of error analysis in Fig. 6 present invention；
The standard capacitor used in Fig. 7 assay methods of the invention capacitance at different frequencies；
The capacitive divider used in Fig. 8 assay methods of the invention ratio error under 2 ~ 13 subharmonic；
The voltage follower used in Fig. 9 assay methods of the invention is from compared with data；
The overall resultant error of Figure 10 assay methods of the invention；
The partial uncertainty that the external magnetic field of Figure 11 assay methods of the invention introduces；
The global error analysis result of Figure 12 assay methods of the invention.
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be with
More fully understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
A kind of assay method of the electronic type voltage transformer harmonic wave degree of accuracy, comprises the following steps：
A：The high-pressure side of capacitive divider is in parallel with the primary side of electronic type voltage transformer to be measured, and apply harmonic voltage；
The harmonic voltage is the harmonic voltage for simulating, and is power network reference voltage superposition each harmonic component.To meet different surveys
Examination demand, its composition and content are variable, and similar to the practical operation situation of power network；
B：The capacitive divider low-pressure side is connected and output voltage signal with voltage follower, by voltage signal conversion
It is the first data signal and input data processing unit；
C：By the second data signal input data processing unit of the electronic type voltage transformer output to be measured；
Electronic mutual inductor is made up of a second part, two second part and Transmission system, and its universal architecture is as shown in figure 3, described treat
It is probably digital output to survey electronic type voltage transformer, it is also possible to analog output.If the electronic type voltage to be measured is mutual
Sensor exports analog quantity, then need to install A/D converter additional, and number is input into again after voltage signal is converted into second data signal
According to processing unit.
D：The data processing unit carries out Fourier transform to first data signal and the second data signal, obtains
Its frequency spectrum, including amplitude spectrum and phase spectrum；On the basis of the first data signal, the amplitude for calculating second data signal is missed
Difference and phase angle difference, obtain the harmonic wave degree of accuracy of the electronic type voltage transformer to be measured.
In one optional embodiment of the present embodiment, also include after the step C, obtain same using clock synchronization circuit
First data signal and the second data signal of one time.The synchronised clock can ensure first data-signal and second
Data-signal obtains phase compensation, so as to ensure the synchronism of phase, it is ensured that the accuracy of measurement result.
In one optional embodiment of the present embodiment, the synchronised clock is crystal oscillator DSA321SCA high.
Fig. 4 is an assay device structures schematic diagram of the electronic type voltage transformer harmonic wave degree of accuracy of the present invention, as illustrated,
Voltage signal is accessed by data collecting card by voltage follower, voltage signal is changed into the first data signal, with electricity to be measured
The output of minor voltage transformer is verified in being linked into data processing unit jointly, to obtain synchronization information of voltage,
One outer triggering signal is sent by synchronised clock and triggers combining unit and the data collecting card simultaneously, so as in the same time
Obtain two kinds of samples of primary voltage.
Fig. 5 is the workflow diagram of the assay method of the electronic type voltage transformer harmonic wave degree of accuracy of the present invention, as illustrated,
Initialized first, then trigger parameter, sampling parameter are set, after trigger signal is received, the data collecting card is adopted
Collect the first data signal, then, calculate output amplitude and phase value；Meanwhile, network interface card gathers the second data signal, parses data frame
Content, finds trigger signal initial data；Calculate to-be-tested transformer output amplitude and phase value；It is base with the first data signal
Standard, calculates error and angular difference, so as to the harmonic wave degree of accuracy to to-be-tested transformer is measured.
In one optional embodiment of the present embodiment, in the step B, will by High Precision Multimeter or data collecting card
The voltage signal is converted to the first data signal.
In one optional embodiment of the present embodiment, the data processing unit is PC.
In one optional embodiment of the present embodiment, the capacitive divider is made up of two standard capacitances.
In one optional embodiment of the present embodiment, to reduce influence of the experimental system to voltage follower, the voltage
Follower is powered using independent DC power supply.
A kind of error analysis method of the measure device of the electronic type voltage transformer harmonic wave degree of accuracy：By the capacitance partial pressure
The error of device and the voltage follower is traced to the source respectively.
Existing harmonic standard system, it is impossible to tracing to the source for high-tension harmonic measure standard is carried out, according in the present invention
Measure device manufactured by assay method cannot also carry out Whole verification, it is impossible to directly be traced to the source, can only be according to composition portion
Divide and traced to the source respectively, the error of voltage divider system and follower is traceable to corresponding standard block respectively, so as to ensure system
The validity of global error.The indirect source tracing method is only applicable to the measure device manufactured by the assay method in the present invention, its
The degree of accuracy of transmission of quantity value is not necessarily suitable the more higher leveled standard of foundation or benchmark.
Mode of tracing to the source of the invention is as shown in fig. 6, in global error analysis is carried out, the error of capacitive divider is to be based on
What difference between the intrinsic standoff ratio and actual intrinsic standoff ratio set by system was produced, can be according to actually measuring the actual intrinsic standoff ratio that draws
And the difference between setting intrinsic standoff ratio draws；And voltage follower can be accessed because input and delivery outlet voltage are relatively low simultaneously
Check system, using self-alignment mode, the error of measurement voltage follower part, so that it is determined that determining the error knot of device
Really.
The error analysis method is mainly included the following steps that：a：Global error is analyzed；b：The uncertainty of global error
Analysis.
Wherein, the step a includes：
a1：Determine capacitive divider error；
a2：Determine voltage follower error；
a3：Capacitive divider error is synthesized with voltage follower error, global error is obtained.
The step b includes：
b1：It is determined that the partial uncertainty introduced by LCR electric bridges;
b2：It is determined that the partial uncertainty introduced by check system；
b3：It is determined that the partial uncertainty introduced by external electromagnetic field；
b4：The uncertainty that b1 ~ b3 is obtained is synthesized, the uncertainty of global error is obtained.
a1：Determine capacitive divider error；
Capacitive divider be by two standard capacitor banks into, using high accuracy LCR bridge capacitors in difference
Capacitance under frequency, so that it is determined that the intrinsic standoff ratio of capacitive divider, measurement result is as shown in Figure 7.
And for capacitive divider, medium consumption factor of its phase difference mainly with capacitor is relevant, but for
For standard capacitor, its medium consumption factor can be ignored, and capacitive divider only introduces the ratio difference of system.By
Fig. 7 can be seen that under the frequency of 2 ~ 13 subharmonic, and standard capacitor electric capacitance change is little, the partial pressure of its capacitive divider
Than being more or less the same, but because the requirement of ratio error is higher, and when harmonic wave accuracy measurement is carried out, system intrinsic standoff ratio is only
Need to be set in Survey Software, so, in order to ensure the degree of accuracy of device to greatest extent, while taking into account the convenience of operation
Property, setting stepwise determines intrinsic standoff ratio of the device when accuracy measurement is carried out, then the ratio of the voltage divider system under corresponding each frequency
Value difference is as shown in Figure 8.
a2：Determine voltage follower error；
Design voltage follower, feature is input impedance high, and output impedance is low, and its effect is to ensure that data collecting card is collected
The precision of signal, its design work voltage is 0 ~ 200V, in frequency for 100Hz ~ 650Hz, it is necessary to meet the overall error of system
Limit value requirement.Voltage follower is powered using independent DC power supply, reduces influence of the experimental system to voltage follower.Due to electricity
The voltage of the input of pressure follower and output is relatively low, verification unit can be directly accessed, so for the measurement of the follower degree of accuracy
What is taken is self-alignment mode, under the harmonic voltage of different frequency, the error between the input of measurement follower and output, electricity
Pressure follower self calibration data are as shown in Figure 9.
The discovery when self calibration is carried out, under same frequency, self calibration error information stabilization does not become with the change of voltage
Change, so, under 2 ~ 13 subfrequencies, the error of voltage follower is measured under selection 60V voltages.
a3：Capacitive divider error is synthesized with voltage follower error, global error is obtained；
The core of harmonic wave accuracy determination method of the invention is standard block, and it is by capacitive divider and voltage follower group
Into during device establishment is determined, it should be noted that the lead in device will be as short as possible and reduces sky using double layer screen
Between electromagnetic interference influence so that in device lead introduce error can be ignored, then now global error maximum should
It is formed by stacking by the absolute value of capacitive divider and the two-part error of voltage follower, now the numerical value of global error such as Figure 10
It is shown.
b：The analysis on Uncertainty of global error；
For the uncertainty of global error result, it is by the introduced A class uncertainties of repetition measurement relative to by instrument
Be can be ignored with for the B class uncertainties caused by external electromagnetic field, so for the global error of Figure 10, its
Uncertainty source is divided into three below aspect：The partial uncertainty introduced by LCR electric bridges；By the not true of check system introducing
Surely component is spent；The partial uncertainty introduced by external electromagnetic field.
b1：It is determined that the partial uncertainty introduced by LCR electric bridges；
The calibration certificate that access is provided by measurement and calibration mechanism to LCR electric bridges, LCR electric bridges are not true for the measurement result of electric capacity
Degree is calmly:Urel=0.04%, Coverage factor k=2, this partial uncertainty is only involved in the uncertainty evaluation of system ratio difference.
b2：It is determined that the partial uncertainty introduced by check system；
The calibration certificate of check system is consulted, measurement result uncertainty of the check system in voltage measurement circuit is：U f=
1.7 × 10-4, U б=0.6 ', Coverage factor k=2.
b3：It is determined that the partial uncertainty introduced by external electromagnetic field；
Reference standard vertification regulation, the measurement error that electromagnetic field causes has two sources：One is caused by calibration equipment electromagnetic field
Measurement error not should be greater than tested determining the 1/10 of directional error limit value；Two be measurement error caused by additional electromagnetic field not
Should be greater than the 1/20 of tested measure directional error limit value.So the measurement error caused by two class electromagnetic fields not should be greater than tested electricity
The 3/20 of transformer error limit value, and obedience is pressed to be uniformly distributed.The tested error limit for determining device is as shown in Fig. 2 beyond institute
The introduced partial uncertainty in portion magnetic field is as shown in figure 11.
b4：The uncertainty that b1 ~ b3 is obtained is synthesized, the uncertainty of global error is obtained；
Each component is relatively independent due to more than, and Coverage factor k=2 is taken after synthesis, and be expanded uncertainty.
The result representation of global error is as shown in figure 12.
From the result of Figure 12, the device that the harmonic wave degree of accuracy to electronic type voltage transformer is measured it is whole
Body error meets the requirement of the error limit of Fig. 2, and the detection work of the product harmonic wave degree of accuracy can be carried out as examination criteria.
The voltage class of the device that the harmonic wave degree of accuracy to electronic type voltage transformer is measured, by its partial pressure system
The influence of the input withstanding voltage of the voltage tolerance of system, the input withstanding voltage of follower and check system capture card,
If desired modular system is used at a higher voltage, need to improve the withstanding voltage of this three part.
Error analysis method of the invention determines the whole of the measure device of the harmonic wave degree of accuracy of electronic type voltage transformer
Body error and uncertainty, the harmonic wave degree of accuracy of the electronic type voltage transformer of the measure device in the present invention
Assay method is made, and with capacitive divider and voltage follower as standard block, measures the humorous of electronic type voltage transformer
Wave property；The error analysis method ensures that the measure device meets standard GB/T 20840.8-2007 and IEC60044-8：
2002 requirement；Source tracing method in embodiment, can develop the accuracy determination device of higher order harmonics, to meet other
The harmonic wave accuracy determination of purposes needs.
Embodiment described above is only the preferred embodiment lifted to absolutely prove the present invention, protection model of the invention
Enclose not limited to this.Equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is defined by claims.
Claims (7)
1. a kind of assay method of the electronic type voltage transformer harmonic wave degree of accuracy, it is characterised in that comprise the following steps：
A：The high-pressure side of capacitive divider is in parallel with the primary side of electronic type voltage transformer to be measured, and apply harmonic voltage；
B：The capacitive divider low-pressure side is connected and output voltage signal with voltage follower, by voltage signal conversion
It is the first data signal and input data processing unit；
C：By the second data signal input data processing unit of the electronic type voltage transformer output to be measured；
D：The data processing unit carries out Fourier transform to first data signal and the second data signal, obtains it frequently
Spectrum, including amplitude spectrum and phase spectrum；On the basis of the first data signal, calculate second data signal amplitude error and
Phase angle difference, obtains the harmonic wave degree of accuracy of the electronic type voltage transformer to be measured.
2. the assay method of the electronic type voltage transformer harmonic wave degree of accuracy as claimed in claim 1, it is characterised in that the step
Also include after rapid C, first data signal and the second data signal of same time are obtained using clock synchronization circuit.
3. the assay method of the electronic type voltage transformer harmonic wave degree of accuracy as claimed in claim 2, it is characterised in that described same
Step clock is crystal oscillator DSA321SCA high.
4. the assay method of the electronic type voltage transformer harmonic wave degree of accuracy as claimed in claim 2, it is characterised in that the step
Rapid B, the first data signal is converted to by High Precision Multimeter or data collecting card by the voltage signal.
5. the assay method of the electronic type voltage transformer harmonic wave degree of accuracy as claimed in claim 1, it is characterised in that the number
It is PC according to processing unit.
6. the assay method of the electronic type voltage transformer harmonic wave degree of accuracy as described in claim 1 ~ 5 is any, it is characterised in that
The capacitive divider is made up of two standard capacitances.
7. a kind of electronic type voltage transformer harmonic wave degree of accuracy measure device error analysis method, it is characterised in that it is described
Device is determined with capacitive divider and voltage follower as standard block, the harmonic characterisitic of electronic type voltage transformer, institute is measured
Error analysis method is stated for determining the precision of the measure device, is comprised the following steps：
a：Global error is analyzed；
b：The analysis on Uncertainty of global error；
Wherein, the step a includes：
a1：Determine capacitive divider error；
a2：Determine voltage follower error；
a3：Capacitive divider error is synthesized with voltage follower error, global error is obtained；
The step b includes：
b1：It is determined that the partial uncertainty introduced by LCR electric bridges;
b2：It is determined that the partial uncertainty introduced by check system；
b3：It is determined that the partial uncertainty introduced by external electromagnetic field；
b4：The uncertainty that b1 ~ b3 is obtained is synthesized, the uncertainty of global error is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710083591.7A CN106872927A (en) | 2017-02-16 | 2017-02-16 | The assay method and error analysis method of the harmonic wave degree of accuracy of electronic type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710083591.7A CN106872927A (en) | 2017-02-16 | 2017-02-16 | The assay method and error analysis method of the harmonic wave degree of accuracy of electronic type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106872927A true CN106872927A (en) | 2017-06-20 |
Family
ID=59166826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710083591.7A Pending CN106872927A (en) | 2017-02-16 | 2017-02-16 | The assay method and error analysis method of the harmonic wave degree of accuracy of electronic type voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106872927A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535679A (en) * | 2018-03-15 | 2018-09-14 | 广东电网有限责任公司东莞供电局 | Capacitance type potential transformer harmonic voltage based on interpolation method accurately measures method |
| CN109613465A (en) * | 2018-12-27 | 2019-04-12 | 中国电力科学研究院有限公司 | A kind of metrological supervision method of low-voltage current mutual inductor automatic calibration assembly line |
| CN109696586A (en) * | 2017-10-23 | 2019-04-30 | 中国电力科学研究院有限公司 | It is a kind of for testing the assessment method and system of electrical power distribution automatization system uncertainty |
| CN110018435A (en) * | 2019-02-21 | 2019-07-16 | 国网山东省电力公司临沂供电公司 | Electronic mutual inductor calibration system and calibration method |
| CN110672936A (en) * | 2019-09-11 | 2020-01-10 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | High-voltage capacitor inductance calibration method and device |
| CN112305484A (en) * | 2020-09-16 | 2021-02-02 | 国网河北省电力有限公司电力科学研究院 | Method and device for judging harmonic measurement accuracy of capacitor voltage transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0974660A (en) * | 1995-09-04 | 1997-03-18 | Nissin Electric Co Ltd | Harmonic detector |
| CN102269787A (en) * | 2011-05-16 | 2011-12-07 | 国网电力科学研究院 | Detection method of harmonic characteristic of electronic voltage transformer and detection device thereof |
| CN102375106A (en) * | 2011-08-18 | 2012-03-14 | 安徽省电力科学研究院 | Device for testing harmonic influence of electronic mutual inductor |
| CN105277914A (en) * | 2015-11-09 | 2016-01-27 | 中国矿业大学 | Capacitive voltage transformer (CVT) harmonic measurement error correction device |
| CN106405470A (en) * | 2016-11-09 | 2017-02-15 | 中国电力科学研究院 | Overall detection method and apparatus for harmonic accuracy of electronic current transformer |
-
2017
- 2017-02-16 CN CN201710083591.7A patent/CN106872927A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0974660A (en) * | 1995-09-04 | 1997-03-18 | Nissin Electric Co Ltd | Harmonic detector |
| CN102269787A (en) * | 2011-05-16 | 2011-12-07 | 国网电力科学研究院 | Detection method of harmonic characteristic of electronic voltage transformer and detection device thereof |
| CN102375106A (en) * | 2011-08-18 | 2012-03-14 | 安徽省电力科学研究院 | Device for testing harmonic influence of electronic mutual inductor |
| CN105277914A (en) * | 2015-11-09 | 2016-01-27 | 中国矿业大学 | Capacitive voltage transformer (CVT) harmonic measurement error correction device |
| CN106405470A (en) * | 2016-11-09 | 2017-02-15 | 中国电力科学研究院 | Overall detection method and apparatus for harmonic accuracy of electronic current transformer |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696586A (en) * | 2017-10-23 | 2019-04-30 | 中国电力科学研究院有限公司 | It is a kind of for testing the assessment method and system of electrical power distribution automatization system uncertainty |
| CN108535679A (en) * | 2018-03-15 | 2018-09-14 | 广东电网有限责任公司东莞供电局 | Capacitance type potential transformer harmonic voltage based on interpolation method accurately measures method |
| CN109613465A (en) * | 2018-12-27 | 2019-04-12 | 中国电力科学研究院有限公司 | A kind of metrological supervision method of low-voltage current mutual inductor automatic calibration assembly line |
| CN109613465B (en) * | 2018-12-27 | 2022-02-01 | 中国电力科学研究院有限公司 | Metering supervision method for automatic verification assembly line of low-voltage current transformer |
| CN110018435A (en) * | 2019-02-21 | 2019-07-16 | 国网山东省电力公司临沂供电公司 | Electronic mutual inductor calibration system and calibration method |
| CN110672936A (en) * | 2019-09-11 | 2020-01-10 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | High-voltage capacitor inductance calibration method and device |
| CN110672936B (en) * | 2019-09-11 | 2022-07-08 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | High-voltage capacitor inductance calibration method and device |
| CN112305484A (en) * | 2020-09-16 | 2021-02-02 | 国网河北省电力有限公司电力科学研究院 | Method and device for judging harmonic measurement accuracy of capacitor voltage transformer |
| CN112305484B (en) * | 2020-09-16 | 2023-02-28 | 国网河北省电力有限公司电力科学研究院 | Method and device for judging harmonic measurement accuracy of capacitor voltage transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106872927A (en) | The assay method and error analysis method of the harmonic wave degree of accuracy of electronic type voltage transformer | |
| CN101807795B (en) | Method for forming electric energy metering simulation system and device thereof | |
| CN102012494B (en) | Transformer calibrator and calibration method thereof | |
| CN101441231B (en) | Harmonic electric energy metering error analytical apparatus | |
| CN101556320B (en) | On-site calibrating method and device of capacitor voltage transformer | |
| Crotti et al. | Frequency compliance of MV voltage sensors for smart grid application | |
| CN101770005A (en) | DC electronic transformer calibration device and method | |
| CN105911499A (en) | Ultrasonically local discharging metering system under onsite environment and method | |
| CN106405470A (en) | Overall detection method and apparatus for harmonic accuracy of electronic current transformer | |
| CN100516856C (en) | Intelligent testing system for moisture of cotton fiber | |
| CN105785135A (en) | Frequency conversion ground impedometer | |
| CN105353330A (en) | On-line verifying system and algorithm for electronic current transformer based on virtual instrument technology | |
| CN109085526A (en) | Harmonic measuring method, apparatus and system based on capacitance type potential transformer | |
| CN109212459A (en) | It is a kind of for carrying out the method and system of whole inspection to DC mutual inductor verification instrument | |
| CN203535010U (en) | Intelligent and dynamic control system for compaction quality of rock-fill dam | |
| CN203490356U (en) | Mutual inductor load box calibrating device with high precision and high reliability | |
| US9897639B2 (en) | Method for implementing electromagnetic anti-interference filter impedance match and measuring system thereof | |
| CN206671525U (en) | The measure device of the harmonic wave degree of accuracy of electronic type voltage transformer | |
| CN105974278B (en) | Oil clearance telegram in reply holds accelerated test method under low frequency mixed excitation based on Sine-Fitting | |
| CN106772199A (en) | A kind of DC current transformer frequency response characteristic check system and method | |
| Crotti et al. | Calibration of MV voltage instrument transformer in a wide frequency range | |
| CN208224473U (en) | A kind of capacitance type equipment tests measuring device with electricity with respect to dielectric loss | |
| CN110598829A (en) | Paper quantity detection method and device | |
| CN110006326A (en) | A kind of deformation of transformer winding intelligent detecting method based on Frequency Response Analysis FRA | |
| CN109815581A (en) | The appraisal procedure of aircraft electrical supply parameters test analysis algorithm software |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170620 |
|
| RJ01 | Rejection of invention patent application after publication |