CN102142314B - Standard capacitor with built-in reverse connection unit for high-voltage medium loss test - Google Patents
Standard capacitor with built-in reverse connection unit for high-voltage medium loss test Download PDFInfo
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- CN102142314B CN102142314B CN2010105609997A CN201010560999A CN102142314B CN 102142314 B CN102142314 B CN 102142314B CN 2010105609997 A CN2010105609997 A CN 2010105609997A CN 201010560999 A CN201010560999 A CN 201010560999A CN 102142314 B CN102142314 B CN 102142314B
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- standard capacitor
- reversal connection
- optical fiber
- reverse connection
- voltage
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Abstract
The invention discloses a standard capacitor with a built-in reverse connection unit for high-voltage medium loss test, which comprises an inflatable high-voltage standard capacitor and a reverse connection unit, wherein the reverse connection unit comprises a reverse connection current sampling unit, an optical fiber for transmitting a reverse connection signal and an optical fiber signal output port; the reverse connection current sampling unit is arranged in an anti-dizzy mask; the optical fiber signal output port is arranged on a standard capacitor base; the optical fiber for transmitting the reverse connection signal passes through a high-voltage insulation barrel; one end of the optical fiber for transmitting the reverse connection signal is connected with the reverse connection current sampling unit, and the other end of the optical fiber for transmitting the reverse connection signal is connected with the optical fiber signal output port. The invention solves the technical problem that when the prior high-voltage standard capacitor is subjected to reverse connection test, the field connection is required, and the potential safety hazards exist and greatly improves the safety and reliability of field test.
Description
Technical field
The present invention relates to a kind of standard capacitor that is used for the test of high voltage dielectric loss, particularly a kind of built-in standard capacitor in reversal connection unit that is used for the test of high voltage dielectric loss.
Background technology
High voltage standard capacitor is situated between at high voltage and decreases the effect of serving as " counterweight " in the test macro, and its capacitance is stable, and the damage that is situated between is minimum, and the standard that can be used as is situated between decreases tester is used.Usually under doing rated voltage, (when >=10kV) Jie decreases test,, test, satisfy the measurement of non-ground connection test product so can only do positive wiring because the measuring junction that decreases electric bridge and standard capacitor that is situated between all is in electronegative potential.But can't satisfy the test of ground connection test product, i.e. the reversal connection thread test.During the reversal connection line, need measure current signal, and current signal isolated through high pressure be sent to low-pressure side and be situated between and decrease electric bridge and measure at high-pressure side.We can be referred to as the reversal connection unit this part functional part.Common way is that the reversal connection unit is installed in the can of a band shielding, need hang over high-pressure side during test, is sent to be situated between through external optical fiber and decreases the electric bridge low-pressure side.This way is tested mesohigh terminated line trouble at the scene, hang not firmly also to fall easily, and unsafe hidden danger is arranged, and damages that fracture easily of external in addition optical fiber influences the reliability of testing.
Summary of the invention
Existing deficiency when technical problem to be solved by this invention is to carry out the reversal connection thread test to existing high voltage standard capacitor and a kind of built-in standard capacitor in reversal connection unit that is used for the test of high voltage dielectric loss is provided.This standard capacitor has reduced field connection with the technology that reversal connection unit and high voltage standard capacitor unite two into one, and has avoided potential safety hazard, owing to adopt built-in fiber, avoids optical fiber to receive the damage of external factor.Fail safe, the reliability of field test have been improved greatly.
Technical problem to be solved by this invention can realize through following technical scheme:
A kind of built-in standard capacitor in reversal connection unit that is used for the test of high voltage dielectric loss; Comprise a gas-filled type high voltage standard capacitor; This gas-filled type high voltage standard capacitor comprises that a high-pressure side, a standard capacitor base are connected the High-Voltage Insulation bucket of said high-pressure side and standard capacitor base with one; Said high-pressure side has an anti-corona cover, and said High-Voltage Insulation bucket contains a standard capacitor, and said standard capacitor base contains a standard capacitor low pressure measurement end; It is characterized in that described standard capacitor also comprises a reversal connection line unit; Said reversal connection line unit comprises that a reversal connection current sampling unit, reversal connection signal transmit the optical fiber and the fiber-optic signal output port of usefulness; Said reversal connection current sampling unit is arranged in the said anti-corona cover; Said fiber-optic signal output port is arranged on the standard capacitor base; The optical fiber that said reversal connection signal transmits usefulness passes said High-Voltage Insulation bucket; Optical fiber one end that the reversal connection signal transmits usefulness connects described reversal connection current sampling unit, and the optical fiber other end that the reversal connection signal transmits usefulness connects described fiber-optic signal output port.
The present invention makes full use of the inner space of high-pressure side and insulation bucket under the constant situation of the structure that keeps the primary standard capacitor and function, reversal connection line assembly of elements is combined.When positive wiring is measured; Reversal connection line unit can not opened; As broad as long with common standard capacitor use, when the reversal connection line is measured, can open reversal connection line unit power supply; The high voltage side current signal that reversal connection line unit obtains sampling is isolated the back through optical fiber and is drawn from the socket on the standard capacitor base, and standard capacitor low pressure measurement end is received Jie's damage electric bridge respectively with fiber-optic signal output signal just can accomplish measurement.The invention solves when existing high voltage standard capacitor carries out the reversal connection thread test needs field connection, has the technical problem of potential safety hazard, has improved fail safe, the reliability of field test greatly.
Description of drawings
Fig. 1 is used for the profile sketch map of the built-in standard capacitor in the reversal connection unit of high voltage dielectric loss test for the present invention.
Fig. 2 is an operation principle sketch map of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth execution mode of the present invention.
Referring to Fig. 1 and Fig. 2; A kind of built-in standard capacitor in reversal connection unit that is used for the test of high voltage dielectric loss; Comprise gas-filled type high voltage standard capacitor and reversal connection line unit, this gas-filled type high voltage standard capacitor comprises high-pressure side 100, standard capacitor base 200 and is connected high-pressure side 100 and the High-Voltage Insulation bucket 300 of standard capacitor base 200.High-pressure side 100 has an anti-corona cover 110, and High-Voltage Insulation bucket 300 contains a standard capacitor 310, and standard capacitor base 200 contains a standard capacitor low pressure measurement end 210.Reversal connection line unit comprises that a reversal connection current sampling unit 410, reversal connection signal transmit the optical fiber 420 and the fiber-optic signal output port 430 of usefulness.
Reversal connection current sampling unit 410 is arranged in the anti-corona cover 110; It comprises a sample resistance 411, amplification filtering circuit 412, photoelectric switching circuit 413; The input of amplification filtering circuit 412 is connected across the two ends of sample resistance 411, and the output of amplification filtering circuit 412 connects the input of photoelectric switching circuit 413.
Fiber-optic signal output port 430 is arranged on the standard capacitor base 200, and the input of fiber-optic signal output port 430 transmits the output of the optical fiber 420 connection photoelectric switching circuits 413 of usefulness through the reversal connection signal.The optical fiber 420 that this reversal connection signal transmits usefulness passes High-Voltage Insulation bucket 300
High-voltage signal is applied to high-pressure side 100 during measurement; The standard loop that one tunnel process standard capacitor, 310 input Jie decrease electric bridges is as standard signal; Another road process high-pressure side sample resistance 411 is applied to the high-pressure side of reversal connection test specimen, obtains being proportional to the magnitude of voltage of test product electric current at the sample resistance two ends, after handling through amplification filtering circuit 412; Become light signal to electrical signal conversion by photoelectric switching circuit 413; Be sent to the optical-electrical converter in the fiber-optic signal output port 430 of low-pressure side through the optical fiber isolated high-voltage, again light signal be reduced into the signal of telecommunication, delivering to is situated between decreases bridge measurement.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection range to be defined by appending claims and equivalent thereof.
Claims (1)
1. one kind is used for the built-in standard capacitor in reversal connection unit that the high voltage dielectric loss is tested; Comprise a gas-filled type high voltage standard capacitor; This gas-filled type high voltage standard capacitor comprises that a high-pressure side, a standard capacitor base are connected the High-Voltage Insulation bucket of said high-pressure side and standard capacitor base with one; Said high-pressure side has an anti-corona cover, and said High-Voltage Insulation bucket contains a standard capacitor, and said standard capacitor base contains a standard capacitor low pressure measurement end; It is characterized in that described standard capacitor also comprises a reversal connection line unit; Said reversal connection line unit comprises that a reversal connection current sampling unit, reversal connection signal transmit the optical fiber and the fiber-optic signal output port of usefulness; Said reversal connection current sampling unit is arranged in the said anti-corona cover; Said reversal connection current sampling unit comprises a sample resistance, amplification filtering circuit, photoelectric switching circuit; The input of amplification filtering circuit is connected across the two ends of sample resistance, and the output of amplification filtering circuit connects the input of photoelectric switching circuit; Said fiber-optic signal output port is arranged on the standard capacitor base; The optical fiber that said reversal connection signal transmits usefulness passes said High-Voltage Insulation bucket; Optical fiber one end of reversal connection signal transmission usefulness connects the output of the photoelectric switching circuit of described reversal connection current sampling unit, and the optical fiber other end that the reversal connection signal transmits usefulness connects described fiber-optic signal output port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105609997A CN102142314B (en) | 2010-11-26 | 2010-11-26 | Standard capacitor with built-in reverse connection unit for high-voltage medium loss test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105609997A CN102142314B (en) | 2010-11-26 | 2010-11-26 | Standard capacitor with built-in reverse connection unit for high-voltage medium loss test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102142314A CN102142314A (en) | 2011-08-03 |
| CN102142314B true CN102142314B (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105609997A Expired - Fee Related CN102142314B (en) | 2010-11-26 | 2010-11-26 | Standard capacitor with built-in reverse connection unit for high-voltage medium loss test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102142314B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018573B (en) * | 2012-08-22 | 2015-04-08 | 浙江省电力公司电力科学研究院 | Field measurement system for dielectric loss value of crosslinked polyethylene power cable |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2060894U (en) * | 1988-12-31 | 1990-08-22 | 浙江省送变电工程公司 | Light guides-microcomputer type instrument for measuring dielectric medium |
| CN1020804C (en) * | 1988-12-31 | 1993-05-19 | 浙江省送变电工程公司 | Dielectric loss measurer by optical fibre and microcomputer |
| CN2199543Y (en) * | 1994-06-20 | 1995-05-31 | 施亚民 | Infrared remote-meter for dielectric loss |
| US6801028B2 (en) * | 2002-11-14 | 2004-10-05 | Fyre Storm, Inc. | Phase locked looped based digital pulse converter |
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2010
- 2010-11-26 CN CN2010105609997A patent/CN102142314B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN102142314A (en) | 2011-08-03 |
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