CN213023535U - Calibration device for capacity tester based on standard phase - Google Patents
Calibration device for capacity tester based on standard phase Download PDFInfo
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- CN213023535U CN213023535U CN202022105671.8U CN202022105671U CN213023535U CN 213023535 U CN213023535 U CN 213023535U CN 202022105671 U CN202022105671 U CN 202022105671U CN 213023535 U CN213023535 U CN 213023535U
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Abstract
The utility model provides a capacity tester calibrating device based on standard phase place for calibrate the empty load state of capacity tester, including alternating current power output device and three-phase load, wherein, alternating current power output device includes: an alternating current power source; the phase adjusting module is connected with the alternating current power source and used for adjusting the output phase of the voltage signal output by the alternating current power source; the phase of the alternating current power source is adjusted through the phase adjusting module, a voltage signal meeting the requirement of a preset phase is output, and then a voltage output distortion waveform in a no-load state is simulated, so that the capacity of the capacity tester is calibrated. 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 standard phase place.
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 that a few power users change the capacity nameplate of the transformer for the purpose of paying less electricity fee, the basic electricity fee expenditure is reduced, and therefore the capacity and the empty load loss of the distribution transformer are required to carry out testing work. For the condition of using a large amount of transformer capacity testers, the transformer capacity testers need to be measured and traced to the source.
In the practical application and test process of the transformer, the capacity and the empty load loss test of the transformer are calculated according to a formula for measuring power, and P = UIcos phi, so the accuracy of the delta U, the delta I and the delta phi directly influences the capacity and the empty load loss test result of the transformer. The voltage U and the current I can be traced well, the error caused by the U and the I can be measured by adopting a standard device, and the measurement of the phase and the control of the output are difficult points.
Disclosure of Invention
The utility model provides a capacity tester calibrating device based on standard phase 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 volume test appearance calibrating device based on standard phase place, including alternating current power output device and three-phase load, alternating current power output device includes:
an alternating current power source;
the phase adjusting module is connected with the alternating current power source and used for adjusting the phase of a voltage signal output by the alternating current power source;
the phase of the alternating current power source is adjusted through the phase adjusting module, and then a voltage signal meeting the requirement of a preset phase is output, so that the voltage output phase in an idle state is simulated, the capacity of the capacity tester is calibrated, and the calibration of the capacity tester under the condition of an idle load is realized.
In one embodiment, the phase adjustment module includes:
the shaping unit is connected with the alternating current power source and is used for shaping a signal output by the alternating current power source;
the frequency modulation and amplitude modulation unit is connected with the shaping unit and is used for carrying out frequency modulation and amplitude modulation on the signals output by the shaping unit;
the power compensation amplification unit is connected with the frequency modulation and amplitude modulation unit and is used for performing power compensation amplification on the signals output by the frequency modulation and amplitude modulation unit;
the coupling unit is connected with the power compensation amplifying unit and is used for coupling the signal output by the power compensation amplifying unit;
and the phase conversion unit is connected with the coupling unit and is used for carrying out phase conversion on the signals coupled by the coupling unit.
In one embodiment, the phase adjustment module further includes:
and the analog-to-digital conversion unit is connected with the output end of the frequency and amplitude modulation unit and is used for converting the signals passing through the frequency and amplitude modulation unit into digital signals.
In one embodiment, the coupling unit is a coil coupling unit.
The embodiment of the utility model provides a capacity tester calibrating device based on standard phase place, including alternating current power output device and three-phase load, alternating current power output device includes alternating current power source and phase adjustment module, and the phase adjustment module is connected between capacity tester and alternating current power source for adjust the output phase place of the voltage signal of alternating current power source output; the phase of the alternating current power source is adjusted through the phase adjusting module, and then a voltage signal meeting the requirement of a preset phase is output, so that the voltage output phase of the transformer in an idle state is simulated, the capacity of the capacity tester is calibrated, and the calibration of the capacity tester under the condition of an idle load is realized.
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 view of a calibration device of a volume tester based on a standard phase according to an embodiment of the present invention;
fig. 2 is a block diagram of a phase adjustment module according to the present invention;
fig. 3 is a block diagram of another phase adjustment module according to 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.
The calibration of the transformer capacity tester needs a three-phase power source to simulate the rated voltage and current on the primary side of the transformer, and in the practical application and test process of the transformer, the transformer capacity and the empty load loss test are calculated according to the formula P = UIcos phi of the measured power, so the accuracy of the voltage variation delta U, the current variation delta I and the phase variation delta phi directly influences the transformer capacity and the empty load loss test result. The error that arouses by U and I under the general condition is compared easily with the etalon and is measured and reachd, and voltage variation, current variation can be fine trace to the source, and the measurement and the control output of phase place are a difficult point, based on this technical problem, the embodiment of the utility model provides a capacity tester calibrating device based on standard phase place to capacity to the capacity tester calibrates, thereby realizes the calibration under the empty load condition of capacity tester.
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 standard phase place for calibrate the empty load state of capacity tester, it is shown with reference to fig. 1, including alternating current power output device 11 and three-phase load 12, alternating current power output device 11 includes:
an alternating current power source 111;
a phase adjusting module 112, connected to the ac power source 111, for adjusting a phase of a voltage signal output by the ac power source 111;
the output phase of the alternating current power source 111 is adjusted by the phase adjusting module 112, and then a voltage signal meeting the requirement of a preset phase is output, so as to simulate the voltage output phase in an idle state, and calibrate the capacity of the capacity tester.
In one embodiment, referring to fig. 2, the phase adjustment module 112 includes:
a shaping unit 1121, connected to the ac power source, for shaping a signal output by the ac power source;
the frequency modulation and amplitude modulation unit 1122 is connected with the shaping unit and is used for carrying out frequency modulation and amplitude modulation on the signals output by the shaping unit;
the power compensation amplification unit 1123 is connected with the frequency modulation and amplitude modulation unit and is used for performing power compensation amplification on the signals output by the frequency modulation and amplitude modulation unit;
a coupling unit 1124 connected to the power compensation amplifying unit, for coupling the signal output by the power compensation amplifying unit; the coaxial and coil coupling unit is used for realizing 90-degree orthogonal standard, then phase transformation is carried out, high-precision phase output standard is realized, the precision and the authenticity of transformer no-load loss and capacity tester calibration are effectively improved, and no-load loss and capacity testing technology is optimally developed. It is noted that the coupling unit 1124 is a coil coupling unit, such as a coaxial and coil coupling unit.
And a phase conversion unit 1125 connected to the coupling unit for performing phase conversion on the signal coupled by the coupling unit.
Further, referring to fig. 3, the phase adjustment module 112 further includes:
and the analog-to-digital conversion unit 1126 is connected to the output end of the frequency and amplitude modulation unit and is used for converting the signal passing through the frequency and amplitude modulation unit into a digital signal.
Meanwhile, the amplification factor of the power compensation amplification unit 1123 and the adjustment factor of the fm unit 1122 may be set and adjusted according to actual requirements.
The embodiment of the utility model provides a capacity tester calibrating device based on standard phase place, including alternating current power output device and three-phase load, and alternating current power output device includes alternating current power source and phase adjustment module, is used for adjusting the output phase place in alternating current power source through phase adjustment module, and then outputs the voltage signal who satisfies preset phase place requirement to simulate the voltage output phase place under the no-load state, calibrate with the capacity to the capacity tester. And further, the aim of calibrating the capacity tester under the condition of empty load is fulfilled. The phase adjusting module comprises the coupling unit, the accuracy and the authenticity of the transformer empty load loss and capacity tester calibration are effectively improved, and reliable guarantee is provided for the transformer empty load loss and capacity test.
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 (4)
1. The utility model provides a capacity tester calibrating device based on standard phase place for carry out the calibration to capacity tester empty load state, including alternating current power output device and three-phase load, its characterized in that, alternating current power output device includes: an alternating current power source; the phase adjusting module is connected with the alternating current power source and used for adjusting the output phase of the voltage signal output by the alternating current power source; the phase of the alternating current power source is adjusted through the phase adjusting module, and then a voltage signal meeting the requirement of a preset phase is output, so that the voltage output phase in a no-load state is simulated, and the capacity of the capacity tester is calibrated.
2. The mass tester calibration device of claim 1, wherein the phase adjustment module comprises:
the shaping unit is connected with the alternating current power source and is used for shaping a signal output by the alternating current power source;
the frequency modulation and amplitude modulation unit is connected with the shaping unit and is used for carrying out frequency modulation and amplitude modulation on the signals output by the shaping unit;
the power compensation amplification unit is connected with the frequency modulation and amplitude modulation unit and is used for performing power compensation amplification on the signals output by the frequency modulation and amplitude modulation unit;
the coupling unit is connected with the power compensation amplifying unit and is used for coupling the signal output by the power compensation amplifying unit;
and the phase conversion unit is connected with the coupling unit and is used for carrying out phase conversion on the signals coupled by the coupling unit.
3. The mass tester calibration device of claim 2, wherein the phase adjustment module further comprises:
and the analog-to-digital conversion unit is connected with the output end of the frequency and amplitude modulation unit and is used for converting the signals passing through the frequency and amplitude modulation unit into digital signals.
4. The device of claim 2, wherein the coupling unit is a coil coupling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022105671.8U CN213023535U (en) | 2020-09-23 | 2020-09-23 | Calibration device for capacity tester based on standard phase |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022105671.8U CN213023535U (en) | 2020-09-23 | 2020-09-23 | Calibration device for capacity tester based on standard phase |
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| Publication Number | Publication Date |
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| CN213023535U true CN213023535U (en) | 2021-04-20 |
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| CN202022105671.8U Active CN213023535U (en) | 2020-09-23 | 2020-09-23 | Calibration device for capacity tester based on standard phase |
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