CN201936001U - Calibrating device for capacitance current tester - Google Patents
Calibrating device for capacitance current tester Download PDFInfo
- Publication number
- CN201936001U CN201936001U CN2010206740401U CN201020674040U CN201936001U CN 201936001 U CN201936001 U CN 201936001U CN 2010206740401 U CN2010206740401 U CN 2010206740401U CN 201020674040 U CN201020674040 U CN 201020674040U CN 201936001 U CN201936001 U CN 201936001U
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- module
- mutual inductor
- interface
- capacitance
- communication interface
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- Expired - Lifetime
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- 238000004891 communication Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 7
- 238000012795 verification Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Abstract
The utility model discloses a calibrating device for a capacitance current tester, which comprises a mutual inductor module (1), a capacitor module (3), a communication module (5) and a computer (6), wherein a transformer switching module (2) is connected in series between the transformer module (1) and the communication interface (5); a capacitor switching module (4) is connected in series between the capacitor module (3) and the communication module (5); the communication interface (5) is connected with a cable of the computer (6); the head and the tail of a secondary side of a three-phase voltage transformer of the transformer module (1) are mutually connected; and an L end interface (7) and an N end interface (8) are led out from the heat and the tail of the secondary side. The two interfaces are connected in series with the communication interface (5) respectively. The calibrating device can be used for checking the capacitance current tester based on a pilot frequency injection method, and the checking range covers all voltage grades and complete ranges; and the calibrating device can realize automatic switching in full range, has reliable performance and is convenient and fast to operate, and the precision is higher than 5%.
Description
Technical field
The utility model relates to a kind of calibration equipment of electronic device, specifically refers to a kind of capacitance current tester calibrating installation.
Background technology
At present, the capacitance current tester is carried out calibration operation, generally adopt capacitance method in kind to carry out.Promptly use several electric capacity in kind and several single-phase potential transformer as the standard utensil, adopt meter that capacitance and voltage transformer (VT) no-load voltage ratio are demarcated in advance.Utilize this material object electric capacity and voltage transformer (VT) that tested capacitance current tester is calibrated after treating.This method has many defectives: 1, power distribution network three-phase ground capacitance range of capacity is big, only calibrates with the electric capacity of several fixed capacities, can't detect with calibration tester gamut scope in working condition; 2, since the mutual inductor that test is used in accuracy, all variant on the nominal transformation ratio with true power distribution network working condition, analog ligand electrical network practical working situation truly; 3, capacitance of every change or mutual inductor ratio all need rewiring, complex operation, and the probability increase that manual operation leads to errors and produces, it is unfavorable that efficiently and accurately is finished experiment.In a word, known detection method tested person number of spots, accuracy and convenience are limit, and are difficult to the capacitance current tester is carried out convenient, verification work efficiently.
The utility model content
The technical problems to be solved in the utility model is that the defective at prior art exists provides a kind of capacitance current tester calibrating installation.Using this device can be that rational, high efficiency calibration is carried out in the electric capacity measurement to the main measurement function of capacitance current tester.
Technical solution of the present utility model is, referring to accompanying drawing 1, this capacitance current tester calibrating installation that is provided includes a mutual inductor module 1, a capacitance module 3, a communication interface 5 and a computer 6 as shown in Figure 1.The mutual inductor handover module 2 of connecting between wherein said mutual inductor module 1 and the described communication interface 5; The electric capacity handover module 4 of connecting between described capacitance module 3 and the described communication interface 5; The primary side of described mutual inductor module 1 links to each other with described capacitance module 3; The tail end of mutual inductor module 1 then with the tail end of the capacitor loop of described capacitance module 3 altogether so that the analog ligand power-to-ground capacitance.Described communication interface 5 links with described computer 6 cables; In addition, the head end and the tail end of the threephase potential transformer secondary side of described mutual inductor module 1 are interconnected, and wherein the head end of threephase potential transformer secondary side is drawn L end interface 7, and the tail end of threephase potential transformer secondary side is drawn N end interface 8.Measuring interface L end interface 7 for these two is connected in series with described communication interface 5 respectively again with N end interface 8.
When the of the present utility model this capacitance current tester calibrating installation that constitutes thus uses, its communication interface 5 is provided with electric capacity the relay that parameter signal is configured to electric capacity handover module 4 respectively, with the relay that parameter configuration arrives mutual inductor handover module 2 that is provided with of electric pressure.Electric capacity handover module 4 is exported needed capacitance by the switching control capacitance module 3 of relay; Mutual inductor handover module 2 is by the electric pressure gear of its relay control mutual inductor module 1.Utilize relay switch to realize the adjustable of the accurate adjusting of mutual inductor ratio and capacitance on a large scale, and then can be that electric capacity is carried out rationally, calibration operation efficiently the main measurement function of capacitance current tester.Relay exists the mutual inductor nominal transformation ratio under the control of computer 6
Switch between four gears; The range ability that electric capacity can be provided with can reach single-phase 0 μ F-110 μ F, three-phase 0 μ F-330 μ F, regulates fineness 1 μ F, and the limits of error ± 0.5% i.e. ± 0.1 μ F.
Principle of work of the present utility model is to use the high precision capacitor group as product to be tested, is " source " of calibrating installation, replaces the distributed capacitance in the zero sequence loop in the on-the-spot test; For as far as possible replacing on-the-spot PT, thereby simulate the 10kV distribution network systems of a micro, and forms and on-the-spot similar zero sequence loop by capacitor near special three-phase high-voltage voltage mutual inductor with on-the-spot test.The capacitance current tester enters the zero sequence loop of this simulation by injecting the alien frequencies signal during verification, and measures given electric capacity and will draw system capacitance amount size and capacitance current size, and measured value and set-point relatively can be drawn check results.Because given capacitance is adjustable on a large scale, so this tester can cover all capacitance current tester range abilities; And can realize calibration under each electric pressure by regulation voltage mutual inductor gear.
The beneficial effects of the utility model are, can carry out verification to the capacitance current tester based on " alien frequencies injection method " principle at present, and the verification gear is contained 6kV, 10kV, 35kV, whole four electric pressures of 66kV distribution, and electric capacity is measured and can be realized that gamut automaticallyes switch.This device performance is reliable and stable, the automaticity height, simple operation, this accuracy of instrument of calibration detection proof that carries out through national high voltage test satellite location has reached more than 0.5%, thereby can effectively satisfy calibration operation, impel the power test instrument to develop to standardization, standardization direction to the capacitance current tester.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model, is denoted as among the figure:
1-mutual inductor module,
2-mutual inductor handover module,
The 3-capacitance module,
4-electric capacity handover module,
The 5-communication interface,
The 6-computer,
The 7-L end interface,
The 8-N end interface.
Embodiment
Referring to accompanying drawing 1, the capacitance current tester calibrating installation of this embodiment of the utility model as shown in Figure 1, the mutual inductor module that contains 6kV, 10kV, 35kV, four gears of 66kV that assembly mutual inductor module that it comprised 1 adopts Chinese state net DianKeYuan Wuhan High Voltage Research Institute to make; Assembly capacitance module 3 adopts commercially available CBB capacitor; Component communication interface 5 adopts commercially available serial ports; The S1 type panel computer that assembly computer 6 adopts the cruel sharp special company of commercially available China Shenzhen to produce.Described assembly is by the series connection of above-mentioned technical solution, wherein connects the G2RL-2 type power relay of this commercially available Omron Corp of mutual inductor handover module 2 employings production by a mutual inductor handover module 2 between mutual inductor module 1 and the communication interface 5; Connect-electric capacity handover module 4 the G2RL-2 type power relay that this electric capacity handover module 4 also adopts commercially available Omron Corp to produce between capacitance module 3 and the communication interface 5; The primary side of above-mentioned mutual inductor module 1 links to each other with capacitance module 3, and the tail end of the capacitor loop of the tail end of this mutual inductor module 1 and capacitance module 3 is ground wire altogether.Communication interface 5 links with computer 6 cables; The head end of the threephase potential transformer secondary side of mutual inductor module 1 and tail end is interconnected and draw L end interface 7 successively respectively and measure interface with 8 two of N end interfaces.Measure interface L end interface 7 for these two and be connected in series communication interface 5 respectively with N end interface 8.
When the capacitance current tester calibrating installation of the present utility model of Gou Chenging is used for the verification of capacitance current tester thus, it is that the structure host computer becomes that its computer 6 is installed host computer procedures, is connected by the communication interface of serial interface cable connection with the slave computer of above-mentioned five modules formation.Then, on the plate slotted line of capacitance current tester is connected to L end interface 7 and N end interface 8 in front, connects the communication cable between ground wire, power lead and host computer and slave computer in the back on the plate.Open the slave computer power knob, can begin to test preceding setting.Set the electric capacity and the voltage gear that need measurement, click " parameter downloads " button then, host computer will send instruction and judge whether host computer communicates by letter normally with slave computer.If communication is undesired, then host computer interface display " serial communication mistake "; If communication is normal, host computer sends two bytes to slave computer with electric capacity, the electric pressure that is provided with.To send to two byte parameter configuration of slave computer to the corresponding pin of single-chip microcomputer after clicking " startup " button again, and driving relay component is set up into respective electrical capacity and relevant voltage gear jointly, front panel " state indication " green light will be lighted this moment, can begin the verification surveying work.
Go to measure the standard electric capacity that this calibrating installation provides, the error of measurement of comparison value and standard value with test product.Click " stopping " button after measurement is finished, " state indication " green light will extinguish, and the state when this moment, this calibrating installation returned to start can be reset capacitance in host computer procedure, and click " startup " button carries out calibration next time.
The utility model is to be the calibrating installation at the exploitation of capacitance current tester, be proved to be and calibrate the tester of present most manufacturer production through manufacturing experimently to try out, precision is up to more than 0.5%, calibration range is contained all electric pressures and whole range, and it is simple to operation, for the electric-power metering management work provides an effective instrument, filled up a blank in current domestic and international capacitance current tester verification field.
Claims (1)
1. capacitance current tester calibrating installation, it is characterized in that, it includes a mutual inductor module (1), a capacitance module (3), a communication interface (5) and a computer (6), the mutual inductor handover module (2) of connecting between wherein said mutual inductor module (1) and the described communication interface (5); The electric capacity handover module (4) of connecting between described capacitance module (3) and the described communication interface (5); The primary side of described mutual inductor module (1) links to each other with described capacitance module (3); The tail end of mutual inductor module (1) then with the tail end of the capacitor loop of described capacitance module (3) altogether, described communication interface (5) links with described computer (6) cable; In addition, the head end and the tail end of the threephase potential transformer secondary side of described mutual inductor module (1) are interconnected, wherein the head end of threephase potential transformer secondary side is drawn L end interface (7), the tail end of threephase potential transformer secondary side is drawn N end interface (8), measures interface L end interface (7) for these two and is connected in series with described communication interface (5) respectively with N end interface (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206740401U CN201936001U (en) | 2010-12-22 | 2010-12-22 | Calibrating device for capacitance current tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206740401U CN201936001U (en) | 2010-12-22 | 2010-12-22 | Calibrating device for capacitance current tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201936001U true CN201936001U (en) | 2011-08-17 |
Family
ID=44447519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206740401U Expired - Lifetime CN201936001U (en) | 2010-12-22 | 2010-12-22 | Calibrating device for capacitance current tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201936001U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096059A (en) * | 2010-12-22 | 2011-06-15 | 湖南省电力公司试验研究院 | Calibration device of capacitance and current tester |
| CN110927649A (en) * | 2019-12-02 | 2020-03-27 | 云南电网有限责任公司玉溪供电局 | Voltage transformer modularization calibrating installation |
-
2010
- 2010-12-22 CN CN2010206740401U patent/CN201936001U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096059A (en) * | 2010-12-22 | 2011-06-15 | 湖南省电力公司试验研究院 | Calibration device of capacitance and current tester |
| CN110927649A (en) * | 2019-12-02 | 2020-03-27 | 云南电网有限责任公司玉溪供电局 | Voltage transformer modularization calibrating installation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SCIENTIFIC RESEARCH INSTITUTE OF HU'NAN ELECTRIC P Free format text: FORMER OWNER: HUNAN INSTITUTE OF POWER COMPANY EXPERIMENT Effective date: 20121031 Owner name: STATE ELECTRIC NET CROP. Effective date: 20121031 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121031 Address after: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Patentee after: Science Research Institute of Hunan Electric Power Co., Ltd. Patentee after: State Grid Corporation of China Address before: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Patentee before: Hunan Institute of Power Company Experiment |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110817 |