CN205861769U - A kind of high-voltage mutual inductor online impedance extraction device - Google Patents
A kind of high-voltage mutual inductor online impedance extraction device Download PDFInfo
- Publication number
- CN205861769U CN205861769U CN201620465009.4U CN201620465009U CN205861769U CN 205861769 U CN205861769 U CN 205861769U CN 201620465009 U CN201620465009 U CN 201620465009U CN 205861769 U CN205861769 U CN 205861769U
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- China
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- mutual inductor
- voltage mutual
- vector network
- network analyzer
- current probe
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Abstract
The utility model discloses a kind of high-voltage mutual inductor online impedance extraction device, it is made up of vector network analyzer (1), RF current probe (2), tested high-voltage mutual inductor (3), shielded cable Guan Bi ring (4), it is characterized in that: vector network analyzer outfan is connected to RF current probe by shielded cable, vector network analyzer input is connected to tested high-voltage mutual inductor by shielded cable, and shielded cable Guan Bi ring is also cross RF current probe central hollow and tested high-voltage mutual inductor central hollow；Described vector network analyzer, it measures frequency is 50Hz 500MHz；Described RF current probe, measuring frequency is 50Hz 500MHz.This utility model device, it is possible to the impedance of On-line testing high-voltage mutual inductor, is effectively improved the impedance measurement precision of high-voltage mutual inductor, is favorably improved the big voltage of power system or Super-Current Measurement, relay protection and system reliability of operation.
Description
Technical field
This utility model relates to a kind of high-voltage mutual inductor online impedance extraction device, belong to electronic equipment calibration, safety with
Reliability engineering field.
Background technology
Big voltage in power system can be changed into small voltage or big electric current is changed into little electricity by high-voltage mutual inductor
Stream, thus realize big voltage or the measurement of big electric current, it is widely used in the power system of 1kV to 220kV.High-voltage mutual inductor
Impedance has a strong impact on big voltage or the measurement result of big electric current and certainty of measurement.At present, offline mode is generally used to measure high pressure
The impedance of transformer, measurement result is vulnerable to the impact of magnetic field size, with presence incomplete same.
Utility model content
Technical problem to be solved in the utility model, is the defect overcoming prior art to exist, it is proposed that Yi Zhonggao
Pressure transformer online impedance extraction device, this device can the impedance of On-line testing high-voltage mutual inductor, be effectively improved high pressure mutual inductance
The impedance measurement precision of device, be favorably improved that the big voltage of power system or Super-Current Measurement, relay protection and system run can
By property.
This utility model high-voltage mutual inductor online impedance extraction device, by vector network analyzer, RF current probe, quilt
Survey high-voltage mutual inductor, shielded cable Guan Bi ring composition.Vector network analyzer outfan is connected to radio frequency electrical by shielded cable
Stream probe, vector network analyzer input is connected to tested high-voltage mutual inductor by shielded cable, and shielded cable Guan Bi ring is same
Time through RF current probe central hollow and tested high-voltage mutual inductor central hollow.
Described vector network analyzer, it measures frequency is 50Hz-500MHz；Described RF current probe, measures frequency
For 50Hz-500MHz.
The work process of this utility model high-voltage mutual inductor online impedance extraction device is as follows:
The first step: according to technical scheme disclosed in the utility model, setting, connected vector Network Analyzer, radio frequency electrical
Stream probe, tested high-voltage mutual inductor, shielded cable Guan Bi ring.
Second step: the test frequency range of vector network instrument is set to 50Hz-500MHz, and completes network vector analyser
Calibration；
3rd step: utilize vector network analyzer to measure the reflection coefficient of outfan, be designated asS 11；
4th step: utilize vector network analyzer to measure the transmission coefficient between input and outfan, be designated asS 21；
5th step: the impedance of tested high-voltage mutual inductorZFor
In formula,Z PTransfger impedance for RF current probe.
This utility model device, it is possible to the impedance of On-line testing high-voltage mutual inductor, is effectively improved the impedance of high-voltage mutual inductor
Certainty of measurement, is favorably improved the big voltage of power system or Super-Current Measurement, relay protection and system reliability of operation.
Accompanying drawing explanation
Fig. 1 is the structure chart of a kind of high-voltage mutual inductor of the present invention online impedance extraction device, in figure: 1-is that vector network divides
Analyzer (measurement frequency is 50Hz-500MHz), 2-be RF current probe (measurement frequency is 50Hz-500MHz), 3-be tested
High-voltage mutual inductor, 4-are that shielded cable closes ring.
Fig. 2 is the impedance test results of certain type high-voltage mutual inductor in embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is described in further detail.
Embodiment, this utility model high-voltage mutual inductor online impedance extraction device, measured frequency by vector network analyzer 1(
Rate is 50Hz-500MHz), RF current probe 2(measure frequency be 50Hz-500MHz), tested high-voltage mutual inductor 3, shielding line
Cable Guan Bi ring 4 forms.Vector network analyzer outfan is connected to RF current probe, vector network analysis by shielded cable
Instrument input is connected to tested high-voltage mutual inductor by shielded cable, and shielded cable Guan Bi ring is also cross in RF current probe
Between hollow and tested high-voltage mutual inductor central hollow.
For certain type high-voltage mutual inductor, with this utility model high-voltage mutual inductor online impedance extraction device, on-line measurement its
Impedance.
The first step: put according to accompanying drawing 1, connected vector Network Analyzer, RF current probe, tested high-voltage mutual inductor,
Article three, shielded cable.
Second step: the test frequency range of vector network instrument is set to 50Hz-500MHz, and completes network vector analyser
Calibration.
3rd step: utilize vector network analyzer to measure the reflection coefficient of outfan, be designated asS 11。
4th step: utilize vector network analyzer to measure the transmission coefficient between input and outfan, be designated asS 21。
5th step: the impedance of tested high-voltage mutual inductorZFor
In formula,Z PFor the transfger impedance of RF current probe, concrete impedance test results is shown in Fig. 2.
Claims (3)
1. a high-voltage mutual inductor online impedance extraction device, by vector network analyzer (1), RF current probe (2), tested
High-voltage mutual inductor (3), shielded cable Guan Bi ring (4) composition, is characterized in that: vector network analyzer outfan passes through shielded cable
Being connected to RF current probe, vector network analyzer input is connected to tested high-voltage mutual inductor by shielded cable, shielding
Cable Guan Bi ring is also cross RF current probe central hollow and tested high-voltage mutual inductor central hollow.
The most according to claim 1, high-voltage mutual inductor online impedance extraction device, is characterized in that: described vector network analysis
Instrument, it measures frequency is 50Hz-500MHz.
The most according to claim 1, high-voltage mutual inductor online impedance extraction device, is characterized in that: described RF current probe,
Measurement frequency is 50Hz-500MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620465009.4U CN205861769U (en) | 2016-05-20 | 2016-05-20 | A kind of high-voltage mutual inductor online impedance extraction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620465009.4U CN205861769U (en) | 2016-05-20 | 2016-05-20 | A kind of high-voltage mutual inductor online impedance extraction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205861769U true CN205861769U (en) | 2017-01-04 |
Family
ID=57642461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620465009.4U Expired - Fee Related CN205861769U (en) | 2016-05-20 | 2016-05-20 | A kind of high-voltage mutual inductor online impedance extraction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205861769U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114076853A (en) * | 2021-10-28 | 2022-02-22 | 南京航空航天大学 | System and method for measuring shielding effectiveness of nonlinear conductive material |
-
2016
- 2016-05-20 CN CN201620465009.4U patent/CN205861769U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114076853A (en) * | 2021-10-28 | 2022-02-22 | 南京航空航天大学 | System and method for measuring shielding effectiveness of nonlinear conductive material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20190520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |