CN213023534U - A calibration device for capacity tester based on distorted waveform voltage - Google Patents
A calibration device for capacity tester based on distorted waveform voltage Download PDFInfo
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- CN213023534U CN213023534U CN202022105664.8U CN202022105664U CN213023534U CN 213023534 U CN213023534 U CN 213023534U CN 202022105664 U CN202022105664 U CN 202022105664U CN 213023534 U CN213023534 U CN 213023534U
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Abstract
The utility model provides a capacity tester calibrating device based on distortion waveform voltage for carry out the check-up to the transformer capacity tester under the empty load state, including alternating current-direct current fitting power and transformer capacity test three-phase load, alternating current-direct current fitting power includes: the voltage source module comprises an alternating current voltage source and a direct current voltage source which are connected in parallel; the alternating current-direct current fitting circuit module is connected with the voltage source module in series so as to integrate a first voltage signal output by the alternating current voltage source and a second voltage signal output by the direct current voltage source and further output a voltage signal meeting the requirement of a preset distortion waveform; the first voltage signal and the second voltage signal are integrated through the AC/DC fitting circuit module, so that the voltage signal meeting the requirement of the preset distortion waveform is output, and the voltage output distortion waveform in the no-load state is simulated to calibrate the capacity of the capacity tester. According to the scheme, the calibration of the capacity tester under the condition of the empty load can be realized.
Description
Technical Field
The utility model belongs to capacity tester calibration equipment field, in particular to capacity tester calibrating device based on distortion waveform voltage.
Background
In the rapid development process of industrialization, the application of electricity metering is very wide, and in the electricity price metering, besides the electricity price of electricity consumption, the electricity price of the capacity of a transformer also needs to be metered. In order to avoid the phenomenon that the power consumer changes the capacity nameplate of the transformer and further reduces the basic electricity expense, the capacity and the empty load loss state of the distribution transformer need to be tested. For the situation of using a large amount of transformer capacity testers and the empty load loss state, measurement tracing needs to be performed.
In the practical application and test process of the transformer, the voltage waveform of the empty load test is influenced by the nonsinusoidal exciting current to different degrees, the waveform is distorted, the distortion degree of the test voltage waveform influences the measurement of the no-load loss of the empty load current, and the influence of the nonsinusoidal exciting current is difficult to overcome in the prior art scheme, so that the verification of the capacity tester under the empty load condition is difficult to realize.
Disclosure of Invention
The utility model provides a capacity tester calibrating device based on distortion waveform voltage to the realization carries out the purpose of check-up to the capacity tester under empty load condition.
According to the utility model provides a capacity tester calibrating device based on distortion waveform voltage for carry out the check-up to the transformer capacity tester under the empty load state, including alternating current-direct current fitting power and transformer capacity test three-phase load, alternating current-direct current fitting power includes:
the voltage source module comprises an alternating current voltage source and a direct current voltage source which are connected in parallel;
the alternating current-direct current fitting circuit module is connected with the voltage source module in series so as to integrate a first voltage signal output by the alternating current voltage source and a second voltage signal output by the direct current voltage source and further output a voltage signal meeting the requirement of a preset distortion waveform;
the first voltage signal and the second voltage signal are integrated through the AC/DC fitting circuit module, so that the voltage signal meeting the requirement of the preset distortion waveform is output, and the voltage output distortion waveform in the no-load state is simulated to calibrate the capacity of the capacity tester.
In one embodiment, further comprising: and the shaping module is connected with the direct-current voltage source and is used for shaping the voltage signal output by the direct-current voltage source.
In one embodiment, further comprising:
and the filtering module is used for filtering the voltage signal output by the alternating voltage module.
In one embodiment, further comprising: and the voltage stabilizing module is used for stabilizing the voltage of the alternating voltage signal filtered by the filtering module.
In one embodiment, further comprising:
and the analog-to-digital conversion module is connected between the voltage source module and the alternating current-direct current fitting circuit module and is used for converting the output of the voltage source module into a digital signal.
The embodiment of the utility model provides a capacity tester calibrating device based on distortion waveform voltage, including alternating current-direct current fitting circuit module, integrate the first voltage signal of alternating current voltage source output and the second voltage signal of direct current voltage source output, and then the output satisfies the voltage signal who predetermines distortion waveform requirement to the realization is to the calibration under the empty load condition of capacity tester.
Drawings
The drawings accompanying this specification are provided to illustrate the invention, and it is to be understood that the embodiments described below are not to be construed as limitations of the invention, but rather as constituting some of the embodiments of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a capacity tester calibration apparatus based on distorted waveform voltage according to an embodiment of the present invention;
fig. 2 is a block diagram of the ac/dc fitting power supply provided by the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Based on the method of the wave form simulation and the correction of empty load consume measurement under the sinusoidal condition to the wave form, direct influence transformer empty load loss and capacity tester calibration result, the utility model provides a simulation empty load loss and capacity test's empty load test voltage waveform distortion's realization method to realize the true condition of transformer empty load consume, improve the authenticity that transformer empty load loss and capacity tester were calibrated.
As is known, the calibration of a transformer capacity tester needs a three-phase power source to simulate the primary-side rated voltage and current of the transformer, and then calculates the capacity value of the transformer by a formula. The traditional three-phase power source adopts a stable alternating current output source and is carried out according to a theoretical model in principle. However, in the practical application and test process of the transformer, the voltage waveform of the no-load test is affected by the non-sinusoidal exciting current to different degrees, so that the waveform is distorted, and the distortion degree of the test voltage waveform has an effect on the measurement of the no-load loss of the no-load current. Therefore, how to calibrate the transformer capacity tester under the empty load condition is a great need in the industry.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The utility model provides a capacity tester calibrating device based on distortion waveform voltage for carry out the check-up to transformer capacity tester under the empty load state, it is shown with reference to figure 1, including alternating current-direct current fitting power and three-phase load the utility model discloses in, refer to figure 2, alternating current-direct current fitting power includes:
a voltage source module 11 including an ac voltage source 111 and a dc voltage source 112 connected in parallel;
the ac/dc fitting circuit module 12 is connected in series with the voltage source module 11 to integrate a first voltage signal output by the ac voltage source 111 and a second voltage signal output by the dc voltage source 112, so as to output a voltage signal meeting a preset distortion waveform requirement;
it should be noted that the voltage value and the frequency of the first voltage signal and the voltage value of the second voltage signal used in the integration process may be set according to actual requirements, and are not specifically limited herein.
The first voltage signal and the second voltage signal are integrated through the alternating current-direct current fitting circuit module 12 to output a voltage signal meeting the requirement of a preset distortion waveform, and then the voltage output distortion waveform in a no-load state is simulated to calibrate the capacity of the capacity tester.
In one embodiment, referring to fig. 2, the device for calibrating a capacity tester based on a distorted waveform voltage further includes: the shaping module 13 is connected to the dc voltage source 112, and is configured to shape a voltage signal output by the dc voltage source 112.
In one embodiment, the device for calibrating a capacity tester based on a distorted waveform voltage further comprises:
the filtering module 14 is configured to perform filtering processing on the voltage signal output by the ac voltage source 111 to filter out clutter frequencies outside the specific frequency point.
In one embodiment, the device for calibrating a capacity tester based on a distorted waveform voltage further comprises: and the voltage stabilizing module 15 is used for stabilizing the alternating voltage signal filtered by the filtering module.
In one embodiment, the device for calibrating a capacity tester based on a distorted waveform voltage further comprises:
and the analog-to-digital conversion module 16 is connected between the voltage source module and the alternating current-direct current fitting circuit module and is used for converting the output of the voltage source module into a digital signal.
The embodiment of the utility model provides a capacity tester calibrating device based on distortion waveform voltage, including alternating current-direct current fitting power and transformer capacity test three-phase load, including alternating current voltage source among the alternating current-direct current fitting power, direct current voltage source and alternating current-direct current fitting circuit, integrate the first voltage signal of alternating current voltage source output and the second voltage signal of direct current voltage source output through alternating current-direct current fitting circuit, satisfy the voltage signal who predetermines the wave distortion waveform requirement with the output, through adjusting transformer capacity test three-phase load, and then realize carrying out the purpose of calibrating to the capacity tester under the empty load condition.
It should be noted that the above is a preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are all within the scope of the technical solution of the present invention.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022105664.8U CN213023534U (en) | 2020-09-23 | 2020-09-23 | A calibration device for capacity tester based on distorted waveform voltage |
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| CN202022105664.8U CN213023534U (en) | 2020-09-23 | 2020-09-23 | A calibration device for capacity tester based on distorted waveform voltage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116754986A (en) * | 2023-08-10 | 2023-09-15 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
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2020
- 2020-09-23 CN CN202022105664.8U patent/CN213023534U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116754986A (en) * | 2023-08-10 | 2023-09-15 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
| CN116754986B (en) * | 2023-08-10 | 2023-11-07 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Welding power supply calibration device with no-load voltage detection function and calibration method |
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