CN202453386U - Multi-range dielectric loss standard instrument - Google Patents
Multi-range dielectric loss standard instrument Download PDFInfo
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- CN202453386U CN202453386U CN2012200452151U CN201220045215U CN202453386U CN 202453386 U CN202453386 U CN 202453386U CN 2012200452151 U CN2012200452151 U CN 2012200452151U CN 201220045215 U CN201220045215 U CN 201220045215U CN 202453386 U CN202453386 U CN 202453386U
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Abstract
The utility model belongs to instrument parts for electrical measurement, in particular to a dielectric loss standard instrument. A multi-range dielectric loss standard instrument is characterized by comprising a shell, a singlechip microcontroller, a relay and at least two standard sources which are connected in parallel and are in different ranges, wherein the singlechip microcontroller, the relay and at least two standard sources are arranged in the shell; each standard source is formed by connecting a standard constant value capacitor and a non-inductive adjustable resistor in series and provided with an external joint; the singlechip microcontroller is connected with the relay and controls connection of the relay and the standard sources; the relay is provided with the external joint; the shell is grounded; and an operating program of the relay is installed in the singlechip microcontroller. The multi-range dielectric loss standard instrument has the advantages that a plurality of standard constant value capacitors can be employed, each capacitor corresponds to 29 dielectric losses of 0.005 percent to 10 percent, gear shifting of the standard instrument is performed by using a computer and a remote controller, manual intervention is not required for the whole process, the standard instrument is safe and reliable, verification time can be greatly shortened, and the problems of complexity and hidden danger in the prior art are solved to a large extent.
Description
Technical field
The utility model belongs to the instrument accessory that the method for electricity consumption is measured, and especially belongs to the dielectric loss standard.
Background technology
The insulation system of electrical equipment constitutes by various insulating medium; Because the electricity of medium is led; Friction when dipole rotates in the polarizable medium and the bubble-discharge in the medium; It is lossy making the medium (or whole insulation system) that is under the high voltage, and this loss is called dielectric loss, and it is the important indicator of insulation of electrical installation performance.The dielectric loss tester is the instrument and meter for automation of a kind of measuring media loss tangent and electric capacity; Can be under power frequency high voltage; The dielectric loss tangent and the capacitance of high-tension apparatuses such as the various insulating material of in-site measurement, insulating sleeve, power cable, capacitor, mutual inductor, transformer; In electric system, use very frequently, verification task is burdensome also.Requirement according to DL/T962-2005 high-pressure medium loss test appearance general technical specifications; The standard losses device that calibrating point needs set point value electric capacity (like 100pF) is evenly chosen 20 calibration points in the tester loss factor full dose limit and is carried out error of indication calibration being situated between to decrease, and the standard losses device that also need choose some definite value electric capacity (like 25pF, 50pF, 1000pF, 10000pF) is chosen three calibration points in upper, middle and lower and carried out the error of indication and calibrate being situated between to decrease in the appearance dielectric dissipation factor amount limit scope.And so far; The reference instrument of domestic calibrating dielectric loss tester is gear needs standard Jie of manual switchover to decrease device; Point of every calibrating all needs the testing person to get into the next calibrating of test site intra point; Switch between several definite value electric capacity also need to get into and carry out the thread-changing operation in the test site, not only very loaded down with trivial details, and in the pilot region of 10kV, carry out frequent operation and have great potential safety hazard.
Summary of the invention
The utility model purpose is to overcome above-mentioned shortcoming, and a kind of multirange dielectric loss standard of can automatically switch calibrating point, safety is provided.
The technical scheme that the utility model adopted is a kind of multirange dielectric loss standard; Its main points are that it comprises housing and be contained in the standard source of the different ranges of singlechip microcontroller, relay and at least two parallel connections in the housing that described standard source is in series by standard definite value electric capacity and noninductive adjustable resistance; Standard source has coupling; Singlechip microcontroller and relay join, and being connected of pilot relay and standard source, and relay has coupling; Frame ground is provided with the working routine of relay in the singlechip microcontroller.
Through being provided with the working routine of relay in the singlechip microcontroller, primary connection high-pressure medium loss test appearance can be accomplished the automatic detection of two ranges.
The standard definite value electric capacity of each standard source and dividing potential drop capacitances in series; The high-end of standard definite value electric capacity is coupling; The centre tap of standard definite value electric capacity and dividing potential drop electric capacity joins through noninductive adjustable resistance and relay; The other end ground connection of dividing potential drop electric capacity, the capacity of dividing potential drop electric capacity are 24 times of standard definite value electric capacity, and K1, K2-K12 are bistable locking type relay in the relay; Noninductive adjustable resistance RV1, RV2-RV11 are accurate adjustable potentiometer, and pairing Jie decreases t g and is respectively 8%, 4%, 2%, 0.8%, 0.4%, 0.2%, 0.08%, 0.04%, 0.02%, 0.01%, 0.005%.
Each capacitor is high-end during measurement all needs short circuit together, so only needs the on off state of relay K 12 corresponding under each electric capacity of control just can realize switch-capacitor.Same; Just can realize switching being situated between and decrease tg as long as change these 11 relay switch states of K1----K11, the acquiescence damage of can selecting to be situated between is: 0.005%0.01% 0.02% 0.03% 0.04% 0.05% 0.06% 0.07% 0.08% 0.09% 0.1%0.2% 0.3% 0.4% 0.5% 0.6% 0.7% 0.8% 0.9% 1% 2% 3% 4% 5%6% 7% 8% 9% 10%; Wherein, 11 be situated between to decrease (8%, 4%, 2%, 0.8%, 0.4%, 0.2%, 0.08%, 0.04%, 0.02%, 0.01%, 0.005%) except what provided, other Jie's damage value all be by these several 11 of providing be situated between decrease that combination comes (for example: tg0.05%=0.01%+0.04%; Tg1%=0.2%+0.8%; Tg3%=0.2%+0.8%+2%).
Based on same principle the utility model also can: have the standard source parallel connection of four different ranges, even more.
The capacity of standard definite value electric capacity with standard source of four different ranges is respectively 25pF, 50pF, 1000pF, 10000pF.
The capacity of standard definite value electric capacity with standard source of four different ranges is respectively 50pF, 100pF, 1000pF, 10000pF.
In order further to simplify and the control detection process; The utility model also carries out further optimal design; Computing machine and telepilot on control system, have been increased; Computing machine is connected with telepilot, has the wireless receiving module that matches with telepilot in the singlechip microcontroller, has optocoupler to be connected between singlechip microcontroller and the relay.
Because this device computer control section is operating on low voltage, and need add the 10kV high pressure during calibrating, SS is in the high-pressure work state always; Therefore except selecting to bear the switch of 10kV high pressure; Also will consider the problem that high-low pressure is isolated simultaneously, this device adopts light-coupled isolation, when the needs change-over switch; Computing machine sends control signal; Control signal so just guarantees can not form undesired signal between simulation system and the digital display circuit through the action that the light-coupled isolation chip produces control signal CS relay, guarantees the normal operation of system.Through the gear shift of telepilot control criterion device, whole process need not manual intervention, and is safe and reliable.
The advantage of the utility model is that this device has a plurality of standard definite value electric capacity to select; Each electric capacity to should have 0.005% one 10% totally 29 be situated between and decrease, point of the every calibrating of testing person all will get into the thread-changing operation of switching between the next calibrating point of test site intra and the several definite value electric capacity before having changed.Through the gear shift that computing machine and telepilot come the control criterion device, whole process need not manual intervention, and is safe and reliable, not only can shorten the calibrating time greatly, and the loaded down with trivial details and potential safety hazard before having improved to a great extent.
Description of drawings
Fig. 1 is the series connection modular concept figure of the utility model
Fig. 2 is the polar plot of Fig. 1
Fig. 3 is the utility model embodiment 1 structural principle synoptic diagram
Positive connection principle synoptic diagram when Fig. 4 is the utility model embodiment 2 uses
Reversal connection line principle schematic when Fig. 5 is the utility model embodiment 2 uses
Fig. 6 decreases for electric capacity is situated between and cuts a grade circuit theory synoptic diagram
Fig. 7 is the computer control process flow diagram
Wherein: 1 housing, 2 standard sources, 21 standard definite value electric capacity, 22 noninductive adjustable resistance 3 relays 4 optocouplers 6 singlechip microcontroller 7 telepilots 8 computing machines.
Embodiment
Below in conjunction with view the utility model is carried out detailed description, following embodiment can make the professional and technical personnel more understand the utility model, but does not limit the utility model in any form.
Like Fig. 1, shown in Figure 2, have the insulating material or the structure of loss, common available series connection or parallel resistor, the equivalent circuit that electric capacity is formed is represented with corresponding polar plot.It is to adopt the series connection model that Jie in the utility model decreases the factor standard.
P=U is arranged
rI=U
cTg δ I
So tg δ=U
r/ U
c=wR
sC
s
When Rs increased, tan δ also increased; δ has reflected the size of dielectric loss, so claim dielectric loss angle, its tangent value tan δ just has been an important parameter of weighing dielectric loss.Can obtain thus, control the size of tan δ value, only need the size of control Rs to get final product.
Based on this principle, embodiment 1, and is as shown in Figure 3; A kind of multirange dielectric loss standard, it comprises housing 1 and is contained in the standard source 2 of the different ranges of singlechip microcontroller 6, relay 3 and at least two parallel connections in the housing 1 that described standard source 2 is in series by standard definite value electric capacity 21 and noninductive adjustable resistance 22; Standard source 2 has coupling; Singlechip microcontroller 6 is joined with relay 3, and being connected of pilot relay 3 and standard source 2, and relay 3 has coupling; Housing 1 ground connection is provided with the working routine of relay 3 in the singlechip microcontroller 6.
The utility model has in use and is just connecing and two kinds of forms of reversal connection, and as shown in Figure 4, for embodiment 2 is just connecing, the coupling of high voltage dielectric loss tester high-tension shielding line and standard source 2 is joined, and the coupling of measuring heart yearn and relay 3 is joined.
As shown in Figure 5, be embodiment 2 reversal connections, the high-tension shielding line of high voltage dielectric loss tester and the coupling of relay 3 are joined, the coupling ground connection of standard source 2.
As shown in Figure 7, during the calibrating of computer control process flow diagram, the standard point that needs calibrating is set earlier.After setting was accomplished, computing machine was to the electric capacity of standard transmitting control commands setting and the damage that is situated between, and control Jie damage appearance begins to boost.After completion of a calibrating point measurement and voltage reduced to zero, computing machine transmitted control signal for the standard losses device, makes the Rs1 of standard losses device that change is set, and got into next standard point calibrating, and on the display screen of standard losses device, showed.By that analogy, when last standard point calibrating completion, after the voltage of high-pressure medium loss test appearance reduces to zero; Computing machine sends control signal again; Switch another capacitance through optocoupler and relay control SS k, repeat above-mentioned verification process, accomplish until calibrating.
After calibration operation finishes, automatic process errors data of computing machine and output calibration certificate.In whole process, realized need not manual intervention.So just can reduce checker's labour intensity, increase work efficiency, reduce human error, the reviewer can be operated away from high pressure, for reviewer's personal safety provides guarantee, and for realizing that automatic calibration testing laboratory established material base.
Because this device computer control section is an operating on low voltage; And calibrating the time need add the 10kV high pressure; SS is in the high-pressure work state always, therefore except selecting to bear the switch of 10kV high pressure, also will consider the problem that high-low pressure is isolated simultaneously; This device adopts light-coupled isolation, and is as shown in Figure 2.When the needs change-over switch; Computing machine sends control signal; Control signal so just guarantees can not form undesired signal between simulation system and the digital display circuit through the action that the light-coupled isolation chip produces control signal CS relay, guarantees the normal operation of system.
As shown in Figure 6; The standard definite value electric capacity of each standard source 2 and dividing potential drop capacitances in series; The high-end of standard definite value electric capacity is coupling, and the centre tap of standard definite value electric capacity and dividing potential drop electric capacity joins through noninductive adjustable resistance and relay 3, the other end ground connection of dividing potential drop electric capacity; The capacity of dividing potential drop electric capacity is 24 times of standard definite value electric capacity, and K1, K2-K12 are bistable locking type relay in the relay 3; Noninductive adjustable resistance RV1, RV2-RV11 are accurate adjustable potentiometer, and pairing Jie decreases tg and is respectively 8%, 4%, 2%, 0.8%, 0.4%, 0.2%, 0.08%, 0.04%, 0.02%, 0.01%, 0.005%.
HV is standard capacitance high-end (being the test high voltage input terminal when just connecing the method wiring); Cx is lead-out terminal (connecing the test signal heart yearn when just connecing method); GND is signal shielding end E; K1----K12 is bistable locking type relay; RV1----RV11 is accurate adjustable potentiometer, and corresponding Jie decreases tg and is respectively (8%, 4%, 2%, 0.8%, 0.4%, 0.2%, 0.08%, 0.04%, 0.02%, 0.01%, 0.005%); C2 is standard capacitor (four is respectively 50pF, 100pF, 1000pF, 10000pF); C1 is dividing potential drop electric capacity (corresponding to 1.2nF, 2.4nF, 24nF, 240nF).
Each capacitor is high-end during measurement all needs short circuit together, so only needs the on off state of relay K 12 corresponding under each electric capacity of control just can realize switch-capacitor.Same; Just can realize switching being situated between and decrease tg as long as change these 11 relay switch states of K1----K11, the acquiescence damage of can selecting to be situated between is: 0.005%0.01% 0.02% 0.03% 0.04% 0.05% 0.06% 0.07% 0.08% 0.09% 0.1%0.2% 0.3% 0.4% 0.5% 0.6% 0.7% 0.8% 0.9% 1% 2% 3% 4% 5%6% 7% 8% 9% 10%; Wherein, 11 be situated between to decrease (8%, 4%, 2%, 0.8%, 0.4%, 0.2%, 0.08%, 0.04%, 0.02%, 0.01%, 0.005%) except what provided, other Jie's damage value all be by these several 11 of providing be situated between decrease that combination comes (for example: tg0.05%=0.01%+0.04%; Tg1%=0.2%+0.8%; Tg3%=0.2%+0.8%+2%).
Claims (6)
1. multirange dielectric loss standard; It is characterized in that it comprises housing (1) and be contained in the standard source (2) of the different ranges of singlechip microcontroller (6), relay (3) and at least two parallel connections in the housing (1) that described standard source (2) is in series by standard definite value electric capacity (21) and noninductive adjustable resistance (22); Standard source (2) has coupling; Singlechip microcontroller (6) and relay (3) join, and being connected of pilot relay (3) and standard source (2), and relay (3) has coupling; Housing (1) ground connection is provided with the working routine of relay (3) in the singlechip microcontroller (6).
2. a kind of multirange dielectric loss standard according to claim 1; It is characterized in that, standard definite value electric capacity of each standard source (2) and dividing potential drop capacitances in series, the high-end of standard definite value electric capacity is coupling; The centre tap of standard definite value electric capacity and dividing potential drop electric capacity joins through noninductive adjustable resistance and relay (3); The other end ground connection of dividing potential drop electric capacity, the capacity of dividing potential drop electric capacity are 24 times of standard definite value electric capacity, and K1, K2-K12 are bistable locking type relay in the relay (3); Noninductive adjustable resistance RV1, RV2-RV11 are accurate adjustable potentiometer, and pairing Jie decreases tg and is respectively 8%, 4%, 2%, 0.8%, 0.4%, 0.2%, 0.08%, 0.04%, 0.02%, 0.01%, 0.005%.
3. a kind of multirange dielectric loss standard according to claim 1 is characterized in that, has standard source (2) parallel connection of four different ranges.
4. a kind of multirange dielectric loss standard according to claim 2 is characterized in that the capacity of the standard definite value electric capacity of the standard source of four different ranges (2) is respectively 25pF, 50pF, 1000pF, 10000pF.
5. a kind of multirange dielectric loss standard according to claim 2 is characterized in that the capacity of the standard definite value electric capacity of the standard source of four different ranges (2) is respectively 50pF, 100pF, 1000pF, 10000pF.
6. a kind of multirange dielectric loss standard according to claim 1; It is characterized in that; It also comprises computing machine (8) and telepilot (7); Computing machine (8) is connected with telepilot (7), has the wireless receiving module that matches with telepilot (7) in the singlechip microcontroller (6), has optocoupler (4) to be connected between singlechip microcontroller (6) and the relay (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200452151U CN202453386U (en) | 2012-02-10 | 2012-02-10 | Multi-range dielectric loss standard instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200452151U CN202453386U (en) | 2012-02-10 | 2012-02-10 | Multi-range dielectric loss standard instrument |
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| Publication Number | Publication Date |
|---|---|
| CN202453386U true CN202453386U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200452151U Expired - Fee Related CN202453386U (en) | 2012-02-10 | 2012-02-10 | Multi-range dielectric loss standard instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345293A (en) * | 2014-11-21 | 2015-02-11 | 国家电网公司 | Medium virtual device for standard calibration of dielectric loss factor of high-voltage capacitor |
| CN106872070A (en) * | 2016-12-29 | 2017-06-20 | 大连银海贡创科技发展有限公司 | A kind of optical fiber composite cable expert diagnostic system based on many reference amounts |
| CN107621573A (en) * | 2017-08-11 | 2018-01-23 | 广西电网有限责任公司电力科学研究院 | A kind of dielectric dissipation factor standard of high stability |
| CN109581264A (en) * | 2019-01-08 | 2019-04-05 | 任守华 | A kind of capacitance and dielectric loss standard |
-
2012
- 2012-02-10 CN CN2012200452151U patent/CN202453386U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345293A (en) * | 2014-11-21 | 2015-02-11 | 国家电网公司 | Medium virtual device for standard calibration of dielectric loss factor of high-voltage capacitor |
| CN104345293B (en) * | 2014-11-21 | 2016-06-29 | 国家电网公司 | A kind of medium virtual bench for high voltage capacitor dielectric loss factor standard correction |
| CN106872070A (en) * | 2016-12-29 | 2017-06-20 | 大连银海贡创科技发展有限公司 | A kind of optical fiber composite cable expert diagnostic system based on many reference amounts |
| CN107621573A (en) * | 2017-08-11 | 2018-01-23 | 广西电网有限责任公司电力科学研究院 | A kind of dielectric dissipation factor standard of high stability |
| CN109581264A (en) * | 2019-01-08 | 2019-04-05 | 任守华 | A kind of capacitance and dielectric loss standard |
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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: 20120926 Termination date: 20150210 |
|
| EXPY | Termination of patent right or utility model |