CN109358309A - The DC component influence experimental rig and method of electrical energy measurement - Google Patents
The DC component influence experimental rig and method of electrical energy measurement Download PDFInfo
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- CN109358309A CN109358309A CN201811427309.3A CN201811427309A CN109358309A CN 109358309 A CN109358309 A CN 109358309A CN 201811427309 A CN201811427309 A CN 201811427309A CN 109358309 A CN109358309 A CN 109358309A
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- 238000005259 measurement Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title abstract description 12
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004445 quantitative analysis Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- 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
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- 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
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Abstract
The present invention relates to the DC component influence experimental rigs and method of a kind of electrical energy measurement, it include: common electric energy metering device and electrical energy measurement standard set-up, it further include power controller, measure-controlling unit, voltage source, ac and dc current source, error calculation display device, wherein the power controller is connected with the voltage source and the ac and dc current source respectively, the common electric energy metering device includes voltage transformer, current transformer and the first electric energy meter, the voltage source and the ac and dc current source are connected with the electrical energy measurement standard set-up and first electric energy meter respectively, the voltage transformer passes through the measure-controlling unit with the current transformer and is connected with the power controller, the electrical energy measurement standard set-up and first electric energy meter are connected with the error calculation display device.The method of the present invention is simple, and accuracy rate is high.
Description
Technical field
The present invention relates to the technical fields of electrical energy measurement, refer in particular to a kind of DC component influence test dress of electrical energy measurement
It sets and method.
Background technique
As power electronics load and nonlinear load are widely applied in AC system, to bringing certain direct current in power grid
Component, and DC component can generate apparent influence to the error of electrical energy measurement Current Transformer.By taking current transformer as an example,
Main flux will will appear DC component in the case of DC component, and direct current flux is overlapped mutually with exchange flux, and DC component is complete
Portion is used to excitation.Due to the excitation property of iron core be it is non-linear, with the increase of DC component, exciting current will be presented positive and negative half
All asymmetrically shapes, and a large amount of harmonic waves are generated, so that the Transfer characteristic of current transformer is deteriorated, finally make core sataration, leads
Cause its ratio difference mobile toward negative direction, phase difference is mobile toward positive direction, and existing research is about transformer error under DC component
And its it is seldom to the quantitative analysis of electrical energy measurement, and lack corresponding hardware means and it is emulated and is tested.
In order to overcome the above problem, Chinese invention patent (CN107748346A) discloses a kind of load containing DC component pair
High-voltage electric energy measurement influence test method, using one through mutual inductor access electric energy meter, a V/v type voltage transformer,
Two current transformers, an error calculation unit, alterating and direct current energy measurement criteria, an a set of load containing DC component, will
Three phase half wave rectification unit simulation load containing DC component, using alterating and direct current energy measurement criteria as measurement criteria, through mutual inductance
Device access electric energy meter detects transformer and high-voltage electric-energy meter under loading effects containing DC component as checked object
Electric energy metering error analyzes influence of the load containing DC component to high-voltage electric energy measurement with this.Although above-mentioned solve containing direct current
Component load influences the problem of lacking research technique to high-voltage electric energy measurement, but method is complicated, and accuracy rate is not high.
Summary of the invention
For this purpose, technical problem to be solved by the present invention lies in method complexity in the prior art is overcome, and accuracy rate is low
Problem, to provide, a kind of method is simple and the DC component influence test dress of the electrical energy measurement that can effectively improve test accuracy rate
It sets and method.
In order to solve the above technical problems, a kind of DC component influence experimental rig of electrical energy measurement of the invention, common electricity
Energy metering device and electrical energy measurement standard set-up, further include power controller, measure-controlling unit, voltage source, ac and dc current
Source, error calculation display device, wherein the power controller is connected with the voltage source and the ac and dc current source respectively,
The common electric energy metering device includes voltage transformer, current transformer and the first electric energy meter, the voltage source with it is described
Voltage transformer is connected, and the ac and dc current source is connected with the current transformer, the voltage source and the alterating and direct current
Stream source is connected with the electrical energy measurement standard set-up and first electric energy meter respectively, and the voltage transformer and the electric current are mutual
Sensor passes through the measure-controlling unit and is connected with the power controller, the electrical energy measurement standard set-up and described first
Electric energy meter is connected with the error calculation display device.
In one embodiment of the invention, the electrical energy measurement standard set-up includes current ratio standard device and
Two electric energy meters.
In one embodiment of the invention, the current ratio standard device includes toroidal core, and the annular magnetic
Primary current line and secondary current line are wound on core, and the primary current line passes through the toroidal core, the secondary current
Line uniform winding is on the toroidal core.
In one embodiment of the invention, it is set on the toroidal core there are two groove, described two grooves are symmetrical
It is arranged in the geometrical symmetry line of the toroidal core.
In one embodiment of the invention, two detection magnetic cores, the detection magnetic core are respectively fixed in the groove
Winding differential concatenation is simultaneously fixed on magnetic flux gate circuit.
In one embodiment of the invention, the magnetic flux gate circuit is positive respectively, is reversely fixed on the toroidal core
Two grooves in.
In one embodiment of the invention, the input terminal of the output end of the magnetic flux gate circuit and amplifying circuit connects,
The output end of the amplifying circuit is connect with the input terminal of secondary current line, the output end and protection circuit of the secondary current line
Input terminal connection.
In one embodiment of the invention, the output end of the protection circuit and load connect.
The present invention also provides a kind of DC component influence test methods of electrical energy measurement, include the following steps: using two
The electric energy in a channel directly acts on common electric energy metering device and electrical energy measurement standard set-up, with the electrical energy measurement standard
The be calculated as a reference value of device, with common the be calculated as subject value of electric energy metering device, be the common electric energy metering device and
The electrical energy measurement standard set-up power supply；Output voltage signal and current signal respectively measure output voltage, current signal, meter
It calculates and locks output voltage and current parameter；By the electric energy of the common electric energy metering device and the output of electrical energy measurement standard set-up
It compares, obtains active and reactive energy measurement error.
In one embodiment of the invention, the parameter includes the parameters such as frequency, amplitude, waveform, phase.
The above technical solution of the present invention has the following advantages over the prior art:
The DC component influence experimental rig and method of electrical energy measurement of the present invention, the measure-controlling unit are calculated and are locked
Determine output voltage and current parameter, is conducive to carry out error analysis according to parameter；Common electric energy metering device and the electric energy meter
The electric energy of amount standard set-up output is compared by the error calculation display device, obtains active and reactive energy metering
Error is tested electrical energy measurement influence to may be implemented under the operating conditions such as different DC components, voltage and current, be can be used for straight
Transformer error and its quantitative analysis to electrical energy measurement under flow component, not only simply, and accuracy rate is high.
Detailed description of the invention
In order to make the content of the present invention more clearly understood, it below according to specific embodiments of the present invention and combines
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is the schematic diagram of the DC component influence experimental rig of electrical energy measurement of the present invention；
Fig. 2 is the schematic diagram of electrical energy measurement standard set-up of the present invention.
Figure of description description of symbols: 11- power controller, 12- measure-controlling unit, 13- voltage source, 14- voltage are mutual
Sensor, 15- ac and dc current source, 16- current transformer, 17- electrical energy measurement standard set-up, 171- toroidal core, 172- are primary
Current mode, 173- secondary current line, 174- groove, 175- magnetic flux gate circuit, 176- amplifying circuit, 177- protect circuit, 18- the
One electric energy meter, 19- error calculation display device.
Specific embodiment
Embodiment one
As shown in Figure 1, the present embodiment provides a kind of DC component influence experimental rig of electrical energy measurement, including common electrical energy measurement
Device and electrical energy measurement standard set-up 17 further include power controller 11, measure-controlling unit 12, voltage source 13, alterating and direct current
Stream source 15, error calculation display device 19, wherein the power controller 11 respectively with the voltage source 13 and the alternating current-direct current
Current source 15 is connected, and the common electric energy metering device includes voltage transformer 14, current transformer 16 and the first electric energy meter
18, the voltage source 13 is connected with the voltage transformer 14, the ac and dc current source 15 and 16 phase of current transformer
Even, the voltage source 13 and the ac and dc current source 15 respectively with the electrical energy measurement standard set-up 17 and first electric energy
Table 18 is connected, and the voltage transformer 14 passes through the measure-controlling unit 12 and the power with the current transformer 16
Controller 11 is connected, the electrical energy measurement standard set-up 17 and first electric energy meter 18 with the error calculation display device
19 are connected.
The DC component influence experimental rig of electrical energy measurement described in the present embodiment, including power controller 11, measurement control
Unit 12, voltage source 13, ac and dc current source 15, common electric energy metering device, electrical energy measurement standard set-up 17, error calculation are aobvious
Showing device 19, wherein the power controller 11 is connected with the voltage source 13 and the ac and dc current source 15 respectively, it is described
Voltage source 13 and the ac and dc current source 15 pass through the power controller 11 difference output voltage signal and current signal, institute
Stating common electric energy metering device includes voltage transformer 14, current transformer 16 and the first electric energy meter 18, the voltage source 13
It is connected with the voltage transformer 14, the ac and dc current source 15 is connected with the current transformer 16, the voltage source 13
It is connected respectively with the electrical energy measurement standard set-up 17 and first electric energy meter 18 with the ac and dc current source 15, so as to
Think the voltage transformer 14, current transformer 16 and first electric energy meter 18 power supply, while being the electrical energy measurement
Standard set-up 17 is powered；The voltage transformer 14 passes through the measure-controlling unit 12 and institute with the current transformer 16
It states power controller 11 to be connected, the voltage source 13 and the ac and dc current source 15 difference output voltage signal and electric current are believed
Number, and the voltage transformer 14 and the current transformer 16 are acted on simultaneously, measure output voltage, the signal of electric current passes through
Sampling returns to the measure-controlling unit 12, and the measure-controlling unit 12 calculates and locks output voltage and current parameter, has
Error analysis is carried out conducive to according to parameter；The electrical energy measurement standard set-up 17 and first electric energy meter 18 with the error
It calculates display device 19 to be connected, the electric energy of common electric energy metering device and the electrical energy measurement standard set-up 17 output passes through described
Error calculation display device 19 compares, and active and reactive energy measurement error is obtained, to may be implemented in different direct currents
Electrical energy measurement influence is tested under the operating conditions such as component, voltage and current, can be used under DC component transformer error and its right
The quantitative analysis of electrical energy measurement, not only simply, and accuracy rate is high.
The electrical energy measurement standard set-up 17 includes current ratio standard device and the second electric energy meter.As shown in Fig. 2, institute
Stating current ratio standard device includes toroidal core 171, and primary current line 172 and secondary is wound on the toroidal core 171
Current line 173, and the primary current line 172 passes through the toroidal core 171,173 uniform winding of secondary current line exists
On the toroidal core 171, to be conducive to generate magnetic field after being powered.Specifically, the last winding of the toroidal core 171,
It is designed using punching, passes through the toroidal core 171 and input tested electric current, secondary winding is uniformly wound on the toroidal core
On 171.It is set on the toroidal core 171 there are two groove 174, described two grooves 174 are arranged symmetrically on the annular magnetic
In the geometrical symmetry line of core 171, to be conducive to reduce the error of measurement.Two detections are respectively fixed in the groove 174
Magnetic core, the detection magnetic core winding differential concatenation are simultaneously fixed on magnetic flux gate circuit 175, and the magnetic flux gate circuit 175 can be realized
The size of primary current is changed into the signal followed with primary current size dullness.The magnetic flux gate circuit 175 is distinguished
Forward direction is reversely fixed in two grooves 174 of the toroidal core 171, to be conducive to for the magnetic signal of generation being converted into
Electric signal.The output end of the magnetic flux gate circuit 175 is connect with the input terminal of amplifying circuit 176, the amplifying circuit 176 it is defeated
Outlet is connect with the input terminal of secondary current line 173, the input of the output end and protection circuit 177 of the secondary current line 173
End connection.
For the primary current line 172 as tested current input terminal, 173 output end of the secondary current line connection is described negative
It carries.Specifically, the output end of the protection circuit 177 and load connect, and can obtain measuring signal by the load.Work as institute
It, can be in the toroidal core when number of ampere turns of the number of ampere turns and the secondary current line 173 of stating primary current line 172 is unequal
Magnetic flux is generated in 171, and then can be generated dullness on two magnetic flux gate circuits 175 and be followed primary current and secondary current
The voltage signal of the difference of number of ampere turns.When the number of ampere turns of the primary current line 172 is less than the number of ampere turns of the secondary current line 173
When, two magnetic flux gate circuits 175 can generate the signal of negative, by the amplifying circuit 176, reduce the secondary current line
173 numbers of ampere turns；When the number of ampere turns of the primary current line 172 is greater than the number of ampere turns of the secondary current line 173, two magnetic fluxs
Gate circuit 175 can generate the signal of positive, by the amplifying circuit 176, increase 173 number of ampere turns of secondary current line, from
And a dynamic balance is formed, so that the number of ampere turns of the secondary current line 173 is equal to the ampere-turn of the primary current line 172
Number.
The measure-controlling unit 12 from definition calculating and locks output voltage and electric current ginseng by its software function
Amount, comprising: the parameters such as frequency, amplitude, waveform, phase, to be conducive to obtain active and reactive energy measurement error.
Embodiment two
The present embodiment provides a kind of DC component influence test methods of electrical energy measurement, include the following steps: step S1: using two
The electric energy in a channel directly acts on common electric energy metering device and electrical energy measurement standard set-up, with the electrical energy measurement standard
The be calculated as a reference value of device, with common the be calculated as subject value of electric energy metering device, be the common electric energy metering device and
The electrical energy measurement standard set-up power supply；Step S2: output voltage signal and current signal respectively measure output voltage, electric current
Signal calculates and locks output voltage and current parameter；Step S3: by the common electric energy metering device and electrical energy measurement standard
The electric energy of device output compares, and obtains active and reactive energy measurement error.
The DC component influence test method of electrical energy measurement described in the present embodiment in the step S1, uses two channels
Electric energy directly act on common electric energy metering device and electrical energy measurement standard set-up, with the electrical energy measurement standard set-up institute
It is calculated as a reference value, is the common electric energy metering device and the electricity with common the be calculated as subject value of electric energy metering device
It can metrological standard unit power supply；In the step S2, output voltage signal and current signal, measure output voltage, electric current respectively
Signal calculates and locks output voltage and current parameter, is conducive to carry out error analysis according to parameter；It, will in the step S3
The electric energy that the common electric energy metering device is exported with electrical energy measurement standard set-up compares, and obtains active and reactive energy
Measurement error, it can be achieved that under the operating conditions such as different DC components, voltage and current on electrical energy measurement influence testing, can be used for
Transformer error and its quantitative analysis to electrical energy measurement under DC component.
The parameter includes the parameters such as frequency, amplitude, waveform, phase, to be conducive to obtain active and reactive energy
Measurement error.
Obviously, the above embodiments are merely examples for clarifying the description, does not limit the embodiments.For
For those of ordinary skill in the art, other different form variations can also be made on the basis of the above description or are become
It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this or change
It moves still within the protection scope of the invention.
Claims (10)
1. a kind of DC component influence experimental rig of electrical energy measurement, common electric energy metering device and electrical energy measurement standard set-up,
It is characterized by also including power controller, measure-controlling unit, voltage source, ac and dc current source, error calculation display dresses
It sets, wherein the power controller is connected with the voltage source and the ac and dc current source respectively, the common electrical energy measurement
Device includes voltage transformer, current transformer and the first electric energy meter, and the voltage source is connected with the voltage transformer, institute
Ac and dc current source is stated to be connected with the current transformer, the voltage source and the ac and dc current source respectively with the electric energy
Metrological standard unit and first electric energy meter are connected, and the voltage transformer and the current transformer pass through the measurement
Control unit is connected with the power controller, the electrical energy measurement standard set-up and first electric energy meter with the error
Display device is calculated to be connected.
2. the DC component influence experimental rig of electrical energy measurement according to claim 1, it is characterised in that: the electrical energy measurement
Standard set-up includes current ratio standard device and the second electric energy meter.
3. the DC component influence experimental rig of electrical energy measurement according to claim 2, it is characterised in that: the current ratio
Standard set-up includes toroidal core, and primary current line and secondary current line are wound on the toroidal core, and the primary electricity
Streamline passes through the toroidal core, and the secondary current line uniform winding is on the toroidal core.
4. the DC component influence experimental rig of electrical energy measurement according to claim 3, it is characterised in that: the toroidal core
On set there are two groove, described two grooves are arranged symmetrically in the geometrical symmetry line of the toroidal core.
5. the DC component influence experimental rig of electrical energy measurement according to claim 4, it is characterised in that: divide in the groove
Gu Ding not be there are two magnetic core be detected, the detection magnetic core winding differential concatenation is simultaneously fixed on magnetic flux gate circuit.
6. the DC component influence experimental rig of electrical energy measurement according to claim 5, it is characterised in that: the fluxgate electricity
Road is positive respectively, is reversely fixed in two grooves of the toroidal core.
7. the DC component influence experimental rig of electrical energy measurement according to claim 6, it is characterised in that: the fluxgate electricity
The output end on road and the input terminal of amplifying circuit connect, and the output end of the amplifying circuit and the input terminal of secondary current line connect
It connects, the output end of the secondary current line is connect with the input terminal of protection circuit.
8. the DC component influence experimental rig of electrical energy measurement according to claim 7, it is characterised in that: the protection circuit
Output end and load connect.
9. a kind of DC component influence test method of electrical energy measurement, characterized by the following steps:
Step S1: being directly acted on common electric energy metering device and electrical energy measurement standard set-up using the electric energy in two channels,
It with common the be calculated as subject value of electric energy metering device is described with the be calculated as a reference value of electrical energy measurement standard set-up
Common electric energy metering device and electrical energy measurement standard set-up power supply；
Step S2: output voltage signal and current signal respectively measure output voltage, current signal, calculate and lock output electricity
Pressure and current parameter；
Step S3: the electric energy that the common electric energy metering device is exported with electrical energy measurement standard set-up is compared, is had
The measurement error of function and reactive energy.
10. a kind of DC component influence test method of electrical energy measurement according to claim 9, it is characterised in that: described
Parameter includes the parameters such as frequency, amplitude, waveform, phase.
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| CN201811427309.3A CN109358309A (en) | 2018-11-27 | 2018-11-27 | The DC component influence experimental rig and method of electrical energy measurement |
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| CN201811427309.3A CN109358309A (en) | 2018-11-27 | 2018-11-27 | The DC component influence experimental rig and method of electrical energy measurement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693753A (en) * | 2019-11-29 | 2020-09-22 | 中国计量大学 | Novel direct current measuring device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865986A (en) * | 2009-04-15 | 2010-10-20 | 武汉国测科技股份有限公司 | System and method for checking error of high-voltage electric energy measurement device |
| CN107102187A (en) * | 2017-05-09 | 2017-08-29 | 中国电力科学研究院 | A kind of Zero flux fluxgate current sensor for alternating current-direct current Super-Current Measurement |
-
2018
- 2018-11-27 CN CN201811427309.3A patent/CN109358309A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865986A (en) * | 2009-04-15 | 2010-10-20 | 武汉国测科技股份有限公司 | System and method for checking error of high-voltage electric energy measurement device |
| CN107102187A (en) * | 2017-05-09 | 2017-08-29 | 中国电力科学研究院 | A kind of Zero flux fluxgate current sensor for alternating current-direct current Super-Current Measurement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693753A (en) * | 2019-11-29 | 2020-09-22 | 中国计量大学 | Novel direct current measuring device |
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