CN106324362A - Generating device of relative dielectric loss and capacitance ratio testing signal - Google Patents
Generating device of relative dielectric loss and capacitance ratio testing signal Download PDFInfo
- Publication number
- CN106324362A CN106324362A CN201610707627.XA CN201610707627A CN106324362A CN 106324362 A CN106324362 A CN 106324362A CN 201610707627 A CN201610707627 A CN 201610707627A CN 106324362 A CN106324362 A CN 106324362A
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- type equipment
- signal
- sampling unit
- current
- tested
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
Abstract
The invention discloses a generating device of a relative dielectric loss and capacitance ratio testing signal, wherein the generating device relates to the technical field of capacitance measuring devices. The generating device comprises the components of a tested capacitive equipment equivalent capacitor, a reference capacitive equipment equivalent capacitor, a first current sampling unit, a second current sampling unit and a signal processing host machine. One end of the tested capacitive equipment equivalent capacitor is connected with the bus of tested capacitive equipment, and the other end is grounded through a first capacitance sampling unit, thereby obtaining the current signal of the tested capacitive equipment. One end of the reference capacitive equipment equivalent capacitor is connected with the bus of the tested capacitive equipment, and the other end is grounded through the second current sampling unit, thereby obtaining the current signal of the reference capacitive equipment. The generating device can accurately obtain the ratio between the relative dielectric loss factor and the capacitance of the tested capacitive equipment.
Description
Technical field
The present invention relates to the measurement apparatus technical field of electric capacity, particularly relate to a kind of relative medium loss and capacitance ratio
Detection signal generation apparatus.
Background technology
Relative medium loss factor and the detection of capacitance ratio are from apparatus insulated power failure dielectric dissipation factor and capacitance
Measuring method develops and comes.Dielectric dissipation factor and capacitance can preferably reflect insulation of electrical installation major part make moist,
The defects such as integral insulation defect.Relative medium loss factor and the carrier-borne of capacitance ratio are to open under equipment normal running (operation) conditions
Exhibition, do not had a power failure by equipment and limited, can carry out at any time when equipment runs.
Summary of the invention
The technical problem to be solved is to provide a kind of relative medium loss and capacitance ratio detection signal is sent out
Generating apparatus, described device can draw relative medium loss factor and the capacitance ratio of tested capacitance type equipment accurately.
For solving above-mentioned technical problem, the technical solution used in the present invention is: a kind of relative medium loss and capacitance
Ratio detection signal generation apparatus, it is characterised in that: include and tested capacitance type equipment equivalent capacity, reference capacitance type equipment
Equivalent capacity, the first current sampling unit, the second current sampling unit and signal processing main frame, described tested capacitor type sets
One end of standby equivalent capacity is connected with the bus of tested capacitance type equipment, described tested capacitance type equipment equivalent capacity another
One end is through described first capacitor sampling unit ground connection, for obtaining the current signal of tested capacitance type equipment；Described with reference to electricity
One end of capacitive equipment equivalent capacity is connected with the bus of tested capacitance type equipment, described reference capacitance type equipment equivalent capacity
The other end through described second current sampling unit ground connection, for obtaining the current signal of reference type capacitance apparatus；Described electric current
Sampling unit is connected by the signal input part of described wired or wireless and described main frame, and described main frame is by calculating two electric currents
The angular difference of signal and Amplitude Ration, draw relative medium loss factor and the capacitance ratio of tested capacitance type equipment.
Further technical scheme is: pass through coaxial electrical between described current sampling unit and described signal processing main frame
Cable is attached.
Further technical scheme is: described current sampling unit is provided with sender unit, described signal processing
Main frame is provided with signal receiving device, and the current signal of described current sampling unit collection is sent by described sender unit
To described signal receiving device, the current signal of reception is sent to signal processing main frame and processes by signal receiving device.
Use and have the beneficial effects that produced by technique scheme: described device is by arranging tested capacitance type equipment
Equivalent capacity and reference capacitance type equipment equivalent capacity, and the electric current of two equivalent capacitys is gathered by current sampling unit,
Then by calculating angular difference and the Amplitude Ration of two current signals, the relative medium loss factor of tested capacitance type equipment is drawn
With capacitance ratio so that the calculating of relative medium loss factor and capacitance ratio is the most accurate.
Additionally, by sender unit together with current sampling unit direct-assembling, utilize wireless launcher to carry out electricity
Circulation is changed, it is achieved the digitized of signal.By sender unit and signal receiving device power supply opening during use, spy can be realized
The wireless transmit of high-frequency signal and reception, and apart from not restricted by signal transmission line length.It is easy to carry, uses more just
Profit, can realize electrical isolation, and safety is the highest.Sender unit inside chip selects suitable sample frequency and transmitting pin
Rate, it is achieved data in situ preliminary treatment, then carries out data and uploads, it is ensured that while measuring accuracy, effectively avoids on-the-spot various
Interference, it is achieved data accurate.Scene can be installed relatively multimode and be carried out on-line monitoring, uses signal processing main frame to be sampled list
Unit's switching, it is simple to equipment routing inspection, timely unusual circumstance.
Accompanying drawing explanation
Fig. 1 is the first theory diagram of device described in the embodiment of the present invention；
Fig. 2 is the second theory diagram of device described in the embodiment of the present invention；
Wherein: 1, tested capacitance type equipment equivalent capacity 2, reference capacitance type equipment equivalent capacity 3, bus 4, coaxial cable.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but the present invention is all right
Using other to be different from alternate manner described here to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
As shown in Figure 1-2, the embodiment of the invention discloses a kind of relative medium loss and capacitance ratio detection signal is sent out
Generating apparatus, including with tested capacitance type equipment equivalent capacity 1, reference capacitance type equipment equivalent capacity the 2, first current sampling list
Unit, the second current sampling unit and signal processing main frame.One end of described tested capacitance type equipment equivalent capacity 1 is with tested
The bus 3 of examination capacitance type equipment connects, and the other end of described tested capacitance type equipment equivalent capacity 1 takes through described first electric capacity
Sample unit ground connection, for obtaining the current signal of tested capacitance type equipment；The one of described reference capacitance type equipment equivalent capacity 2
End is connected with the bus 3 of tested capacitance type equipment, and the other end of described reference capacitance type equipment equivalent capacity 2 is through described second
Current sampling unit ground connection, for obtaining the current signal of reference type capacitance apparatus；Described current sampling unit has described in passing through
Line or wireless network are connected with the signal input part of described main frame, and described main frame is by calculating angular difference and the width of two current signals
Value ratio, draws relative medium loss factor and the capacitance ratio of tested capacitance type equipment.
Described device by arranging tested capacitance type equipment equivalent capacity and reference capacitance type equipment equivalent capacity, and
The electric current of two equivalent capacitys is gathered, then by calculating angular difference and the amplitude of two current signals by current sampling unit
Ratio, draws relative medium loss factor and the capacitance ratio of tested capacitance type equipment so that relative medium loss factor and
The calculating of capacitance ratio is the most accurate.
Two kinds of connected modes are had between current sampling unit and described signal processing main frame, the first, as it is shown in figure 1, institute
State and be attached by coaxial cable 4 between current sampling unit and described signal processing main frame.The second, as in figure 2 it is shown, institute
Stating current sampling unit and be provided with sender unit, described signal processing main frame is provided with signal receiving device, described electric current
The current signal of sampling unit collection is sent to described signal receiving device, signal receiving device by described sender unit
The current signal of reception is sent to signal processing main frame process.
By sender unit together with current sampling unit direct-assembling, utilize wireless launcher to carry out electric current and turn
Change, it is achieved the digitized of signal.By sender unit and signal receiving device power supply opening during use, superfrequency can be realized
The wireless transmit of signal and reception, and apart from not restricted by signal transmission line length.Being easy to carry, it is more convenient to use,
Can realize electrical isolation, safety is the highest.Sender unit inside chip selects suitable sample frequency and transmission frequency,
Realize data in situ preliminary treatment, then carry out data and upload, it is ensured that while measuring accuracy, effectively avoid on-the-spot various dry
Disturb, it is achieved data accurate.Scene can be installed relatively multimode and be carried out on-line monitoring, uses signal processing main frame to be sampled unit
Switching, it is simple to equipment routing inspection, timely unusual circumstance.
Claims (3)
1. a relative medium loss and capacitance ratio detection signal generation apparatus, it is characterised in that: include and tested electricity
Capacitive equipment equivalent capacity (1), reference capacitance type equipment equivalent capacity (2), the first current sampling unit, the second current sampling list
Unit and signal processing main frame, one end of described tested capacitance type equipment equivalent capacity (1) and tested capacitance type equipment
Bus (3) connects, and the other end of described tested capacitance type equipment equivalent capacity (1) connects through described first capacitor sampling unit
Ground, for obtaining the current signal of tested capacitance type equipment；One end of described reference capacitance type equipment equivalent capacity (2) and quilt
The bus (3) of testing capacitor type equipment connects, and the other end of described reference capacitance type equipment equivalent capacity (2) is through described second electricity
Stream sampling unit ground connection, for obtaining the current signal of reference type capacitance apparatus；Described current sampling unit is by described wired
Or wireless network is connected with the signal input part of described main frame, described main frame is by calculating angular difference and the amplitude of two current signals
Ratio, draws relative medium loss factor and the capacitance ratio of tested capacitance type equipment.
2. relative medium loss as claimed in claim 1 and capacitance ratio detection signal generation apparatus, it is characterised in that: institute
State and be attached by coaxial cable (4) between current sampling unit and described signal processing main frame.
3. relative medium loss as claimed in claim 1 and capacitance ratio detection signal generation apparatus, it is characterised in that: institute
Stating current sampling unit and be provided with sender unit, described signal processing main frame is provided with signal receiving device, described electric current
The current signal of sampling unit collection is sent to described signal receiving device, signal receiving device by described sender unit
The current signal of reception is sent to signal processing main frame process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707627.XA CN106324362A (en) | 2016-08-23 | 2016-08-23 | Generating device of relative dielectric loss and capacitance ratio testing signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707627.XA CN106324362A (en) | 2016-08-23 | 2016-08-23 | Generating device of relative dielectric loss and capacitance ratio testing signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106324362A true CN106324362A (en) | 2017-01-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610707627.XA Pending CN106324362A (en) | 2016-08-23 | 2016-08-23 | Generating device of relative dielectric loss and capacitance ratio testing signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106324362A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793990A (en) * | 2005-12-29 | 2006-06-28 | 西安电子科技大学 | On-line monitoring system for capacitor type equipment dielectricless |
| CN203849316U (en) * | 2014-05-27 | 2014-09-24 | 国家电网公司 | Multifunctional current signal sampling box used for relative dielectric loss and capacitance ratio measurement |
-
2016
- 2016-08-23 CN CN201610707627.XA patent/CN106324362A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793990A (en) * | 2005-12-29 | 2006-06-28 | 西安电子科技大学 | On-line monitoring system for capacitor type equipment dielectricless |
| CN203849316U (en) * | 2014-05-27 | 2014-09-24 | 国家电网公司 | Multifunctional current signal sampling box used for relative dielectric loss and capacitance ratio measurement |
Non-Patent Citations (2)
| Title |
|---|
| 周卫华 主编: "《输变电设备状态检修试验技术（变压器类）》", 31 December 2015 * |
| 林维平: "电容型设备绝缘带电测试系统的研究", 《石油和化工设备》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |
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| RJ01 | Rejection of invention patent application after publication |