CN111596251A - Broadband current transformer phase error measuring device and method - Google Patents
Broadband current transformer phase error measuring device and method Download PDFInfo
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- CN111596251A CN111596251A CN202010663951.2A CN202010663951A CN111596251A CN 111596251 A CN111596251 A CN 111596251A CN 202010663951 A CN202010663951 A CN 202010663951A CN 111596251 A CN111596251 A CN 111596251A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000000691 measurement method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 2
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- 238000004804 winding 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
- G01R35/02—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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
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- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The application belongs to the field of measurement calibration design, and particularly relates to a device and a method for measuring a phase error of a broadband current transformer. The device comprises: the device comprises an alternating current power source, a power analyzer and a current transformer, wherein a voltage output end of the alternating current power source is connected with a voltage input end of the power analyzer, a primary side current input end of the alternating current transformer is connected with a current output end of the alternating current power source, and a secondary side current output end of the alternating current transformer is connected with a current input end of the power analyzer. According to the method, the current of the alternating current power source is input to the primary side of the current transformer by utilizing the same phase of the current and the voltage of the power source, and the phase error of the primary side current and the secondary side current of the current transformer is obtained by measuring the phase error of the alternating current power source voltage and the secondary side output current of the current transformer.
Description
Technical Field
The application belongs to the field of measurement calibration design, and particularly relates to a device and a method for measuring a phase error of a broadband current transformer.
Background
The common working frequency of the current transformers in the market is 50Hz, the working frequencies of the current transformers used in the aircraft power supply system are 400Hz, 800Hz and 1200Hz, JJJG 313-2010 Current transformers for measurement are adopted for calibrating the power frequency 50Hz current transformers, and no effective calibration method is available for the current transformers 400Hz, 800Hz and 1200Hz current transformers used in the aircraft power supply system at present.
Disclosure of Invention
In order to solve the technical problem, the application provides a device and a method for measuring the phase error of a broadband current transformer, which solve the problem of calibrating 400Hz, 800Hz and 1200Hz current transformers used by an aircraft power supply system and obtain the phase errors of primary side current and secondary side current of the transformers.
The application provides a wide band current transformer phase error measuring device includes: an alternating current power source, a power analyzer, and a current transformer, wherein,
the voltage output end of the alternating current power source is connected with the voltage input end of the power analyzer, the primary side current input end of the alternating current transformer is connected with the current output end of the alternating current power source, and the secondary side current output end of the alternating current transformer is connected with the current input end of the power analyzer.
Preferably, the current transformer is a 400Hz current transformer.
Preferably, the current transformer is an 800Hz current transformer.
Preferably, the current transformer is a 1200Hz current transformer.
The application provides a broadband current transformer phase error measurement method, based on the broadband current transformer phase error measurement device, the method includes:
step S1, connecting an alternating current power source, a power analyzer and a current transformer in place;
step S2, adjusting the voltage, the current and the frequency of the alternating current power source, wherein the voltage is set to be more than or equal to 2V, the current is set to be a preset current value, the preset current value meets the primary side current requirement of the current transformer, and the frequency is set to be equal to the frequency of the current transformer;
and step S3, opening the vector analysis function of the power analyzer, and measuring the vector included angle between U and I, namely the phase error of the primary current and the secondary current of the current transformer.
According to the broadband current transformer phase error measuring device and method, the current of an alternating current power source is input to the primary side of a current transformer by utilizing the same phase of the current and the voltage of the power source, and the phase error of the alternating current power source voltage and the secondary side output current of the current transformer is measured to be the phase error of the primary side current and the secondary side current of the current transformer.
According to the method, the phase error of the primary side current and the secondary side current of the current transformer is obtained by measuring the phase error of the alternating current power source voltage and the secondary side output current of the current transformer, the thought is novel, the method is simple and reliable, the magnitude transmission meets the requirements, and the problem of calibration of the phase error of the current transformer with the frequency of 400Hz, 800Hz and 1200Hz is solved.
Drawings
Fig. 1 is a schematic diagram of a wideband current transformer phase error measurement device according to the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.
The application provides a device and a method for measuring a phase error of a broadband current transformer, which solve the problem of calibration of 400Hz, 800Hz and 1200Hz current transformers used by an aircraft power supply system and obtain the phase errors of primary side current and secondary side current of the transformers.
The structure of the broadband current transformer phase error measuring device of the application is shown in fig. 1, and mainly comprises: an alternating current power source, a power analyzer, and a current transformer, wherein,
the voltage output end of the alternating current power source is connected with the voltage input end of the power analyzer, the primary side current input end of the alternating current transformer is connected with the current output end of the alternating current power source, and the secondary side current output end of the alternating current transformer is connected with the current input end of the power analyzer.
In some alternative embodiments, the current transformer may be a 400Hz current transformer, an 800Hz current transformer, or a 1200Hz current transformer.
The application provides a broadband current transformer phase error measurement method, based on the broadband current transformer phase error measurement device, the method includes:
step S1, connecting an alternating current power source, a power analyzer and a current transformer in place;
step S2, adjusting the voltage, the current and the frequency of the alternating current power source, wherein the voltage is set to be more than or equal to 2V, the current is set to be a preset current value, the preset current value meets the requirement of the primary side current of the current transformer, and the frequency is set to be equal to the frequency of the current transformer;
and step S3, turning on a vector analysis function of the power analyzer, and measuring a vector included angle between U and I, namely phase errors of the primary current and the secondary current of the current transformer.
Specifically, firstly, a standard source is selected, the standard source is an alternating current power source, can output voltage and current at the same time, is adjustable in frequency, can output 400Hz, 800Hz and 1200Hz, and the current adjusting range meets the requirement of the primary side input current range of the current transformer to be calibrated. Then, connecting the alternating current power source, the power analyzer and the current transformer to be calibrated in place, specifically: the voltage output end of an alternating current power source is connected with the voltage input end of a power analyzer, the input end of primary side current of an alternating current transformer to be calibrated is connected with the current output end of the alternating current power source, and the output end of secondary side current of the alternating current transformer to be calibrated is connected with the current input end of the power analyzer. And then, adjusting the voltage, the current and the frequency of the alternating current power source, wherein the voltage is set to be greater than or equal to 2V, the current is output to a primary required value of the current transformer (a coil winding current multiplication method can be adopted), and the frequency is set to be equal to the frequency of the current transformer to be calibrated. In some alternative embodiments of the present application, the frequency of the current transformer to be calibrated may be one of 400Hz, 800Hz, 1200 Hz. And finally, opening a vector analysis function of the power analyzer, and measuring a vector included angle between the U and the I, namely the phase error of the primary current and the secondary current of the current transformer to be calibrated.
According to the scheme, the current and the voltage of the alternating current power source are in the same phase, the current of the alternating current power source is input into the primary side of the current transformer, and the phase error of the alternating current power source voltage and the output current of the secondary side of the current transformer is measured to be the phase error of the primary side current and the secondary side current of the current transformer. The method has novel thought, is simple and reliable, meets the requirement of magnitude transmission, and solves the problem of phase error calibration of the current transformers of 400Hz, 800Hz and 1200 Hz.
Claims (5)
1. The utility model provides a wide band current transformer phase error measuring device which characterized in that includes: an alternating current power source, a power analyzer, and a current transformer, wherein,
the voltage output end of the alternating current power source is connected with the voltage input end of the power analyzer, the primary side current input end of the alternating current transformer is connected with the current output end of the alternating current power source, and the secondary side current output end of the alternating current transformer is connected with the current input end of the power analyzer.
2. The broadband current transformer phase error measurement device of claim 1, wherein the current transformer is a 400Hz current transformer.
3. The broadband current transformer phase error measurement device of claim 1, wherein the current transformer is an 800Hz current transformer.
4. The broadband current transformer phase error measurement device of claim 1, wherein the current transformer is a 1200Hz current transformer.
5. A broadband current transformer phase error measurement method based on the broadband current transformer phase error measurement device of any one of claims 1 to 4, the method comprising:
step S1, connecting an alternating current power source, a power analyzer and a current transformer in place;
step S2, adjusting the voltage, the current and the frequency of the alternating current power source, wherein the voltage is set to be more than or equal to 2V, the current is set to be a preset current value, the preset current value meets the primary side current requirement of the current transformer, and the frequency is set to be equal to the frequency of the current transformer;
and step S3, opening the vector analysis function of the power analyzer, and measuring the vector included angle between U and I, namely the phase error of the primary current and the secondary current of the current transformer.
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| CN202010663951.2A CN111596251A (en) | 2020-07-10 | 2020-07-10 | Broadband current transformer phase error measuring device and method |
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| CN202010663951.2A CN111596251A (en) | 2020-07-10 | 2020-07-10 | Broadband current transformer phase error measuring device and method |
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Citations (6)
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| CA2484742A1 (en) * | 2004-09-28 | 2006-03-28 | Veris Industries, Llc | Electricity metering with a current transformer |
| CN103399610A (en) * | 2013-08-22 | 2013-11-20 | 成都启臣微电子有限公司 | Primary feedback self-compensating sampling circuit |
| CN108761375A (en) * | 2018-07-31 | 2018-11-06 | 山西互感器电测设备有限公司 | A kind of low-power consumption program control type current mutual inductor field detecting device |
| CN109541509A (en) * | 2017-09-21 | 2019-03-29 | 诺仪器（中国）有限公司 | The phase frequency calibration system and method for current sensor |
| CN109541516A (en) * | 2018-11-20 | 2019-03-29 | 国家电网有限公司 | A kind of voltage transformer wideband error measurement method |
| CN110426667A (en) * | 2019-06-17 | 2019-11-08 | 中国电力科学研究院有限公司 | A kind of system and method for all-fiber current transformator progress wideband verification |
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2020
- 2020-07-10 CN CN202010663951.2A patent/CN111596251A/en active Pending
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| CA2484742A1 (en) * | 2004-09-28 | 2006-03-28 | Veris Industries, Llc | Electricity metering with a current transformer |
| CN103399610A (en) * | 2013-08-22 | 2013-11-20 | 成都启臣微电子有限公司 | Primary feedback self-compensating sampling circuit |
| CN109541509A (en) * | 2017-09-21 | 2019-03-29 | 诺仪器（中国）有限公司 | The phase frequency calibration system and method for current sensor |
| CN108761375A (en) * | 2018-07-31 | 2018-11-06 | 山西互感器电测设备有限公司 | A kind of low-power consumption program control type current mutual inductor field detecting device |
| CN109541516A (en) * | 2018-11-20 | 2019-03-29 | 国家电网有限公司 | A kind of voltage transformer wideband error measurement method |
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Application publication date: 20200828 |