CN102736049B - Wireless-remote-control simulated dielectric loss device - Google Patents
Wireless-remote-control simulated dielectric loss device Download PDFInfo
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- CN102736049B CN102736049B CN201110382027.8A CN201110382027A CN102736049B CN 102736049 B CN102736049 B CN 102736049B CN 201110382027 A CN201110382027 A CN 201110382027A CN 102736049 B CN102736049 B CN 102736049B
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Abstract
The invention discloses a wireless-remote-control simulated dielectric loss device, which comprises a singlechip, a signal conditioning circuit, a phase-shifting circuit, a constant current output circuit and a infrared signal receiving circuit, wherein the signal conditioning circuit is used for converting a current signal flowing through a standard capacitor to a voltage signal; the phase-shifting circuit is used for performing phase shift on the input voltage signal, and the phase-shifting circuit comprises a plurality of electronic phase shifters, and an input end of each electronic phase shifter is connected with an output end of the signal conditioning circuit through an electronic switching circuit, and an control end of each electronic switching circuit is connected with a corresponding loss value gear output signal output end of the singlechip; and the constant current output circuit is used for converting a phase-shifted voltage signal output by a phase shifter unit to a phase-shifted current signal so as to be output to a tested end of a dielectric loss tester to be tested; and the infrared signal receiving circuit is connected with a signal input port of the singlechip. The wireless-remote-control simulated dielectric loss device provided by the invention is wirelessly controlled by remote control, and the security of operating personnel is ensured, and the work efficiency is also improved.
Description
Technical field
The present invention relates to electric system medium loss measurement equipment technical field, particularly a kind of remote-controlled simulation medium loss device.
Background technology
The insulation status of high voltage electric equipment plays vital effect to the safe operation of electric system.And accident in electric system has much because Insulation Problems causes, in order to guarantee the safe operation of electric system, must carry out Insulation Test, dielectric loss measurement test is that a very high insulation of sensitivity detects test.
Dielectric loss measurement mostly adopts high-voltage capacitance electric bridge as testing apparatus at present, and whether measurement result is accurately directly connected to the safety of electrical production.In order to guarantee the reliability of measurement result, need periodic check testing apparatus.
What dielectric loss electric bridge (or dielectric loss measuring instrument) verification was commonly used is standard losses device method or standard electric bridge Comparison Method.
Standard losses device method is exactly the standard losses device of using by the different electric capacitys of the dielectric loss bridge measurement of verification and dielectric loss value, then draws measuring error.Standard electric bridge Comparison Method is with the accurate electric bridge of a station symbol and measured same test specimen by verification electric bridge simultaneously, then calculate and standard electric bridge between deviation.No matter be to use which kind of method, all need to be equipped with loss device.
Conventionally laboratory or scene are used for all kinds of dielectric loss testers of verification, and the standard losses device of use is to be all composed in series from different resistance by a standard capacitor, to reach the object of the different loss values of adjusting.This class loss device principle of work is simple, but it exists the shortcoming of following several respects:
1. when loss value is larger, resistance in series need to be born very high voltage and very large power.Can not meet the withstand voltage requirement of general standard capacitor low pressure end.And resistor power is too large, improper commercialization is produced.
When select compared with low capacity standard capacitor time, the resistance value that need to connect when dielectric loss value is larger is very large, is easy to be subject to distributed capacitance and change in resistance (large resistance resistance is easily subject to the impacts such as temperature humidity and changes) and causes loss value unstable.
3. the loss device dielectric loss value (tg δ) of common this model can only accomplish 0～0.1.
4. loss value gear shift all needs to switch by mechanical switch, and contact is easily aging, and dangerous.
Summary of the invention
Technical matters to be solved by this invention is for existing standard loss device existing problem when all kinds of dielectric loss tester of verification, the angle of stablizing and reduce as far as possible environmental baseline restriction from loss device, in conjunction with the positive and negative wiring feature of high-voltage capacitance electric bridge, and provide a kind of simulation medium loss device that can wireless remote control.This can wireless remote control simulation medium loss device can to test macro, simply proofread easily, get rid of the fault in test.Simultaneously simulation medium loss device that can wireless remote control of the present invention also can be used for the calibration operation of metrological service to high-voltage capacitance electric bridge.
Technical matters to be solved by this invention can realize by following technical solution:
Simulation medium loss device that can wireless remote control, comprising:
One single-chip microcomputer, described single-chip microcomputer has several loss value gear output signal output terminals;
In order to the current signal of the standard capacitor of flowing through is converted to the signal conditioning circuit of voltage signal, the input end of described signal conditioning circuit is inputted the current signal of the standard capacitor of flowing through;
In order to the voltage signal of input is carried out to the phase-shift circuit of phase shift, described phase-shift circuit comprises some electronic phase shifters, wherein the input end of each electronic phase shifter is connected with the output terminal of described signal conditioning circuit by an electronic switching circuit, and the control end of each electronic switching circuit connects with the corresponding loss value gear output signal output terminal in described single-chip microcomputer;
In order to the voltage signal after phase shift of phase shifter element output is transformed into the constant current output circuit that exports the tested end of tested dielectric loss measuring instrument through the current signal of phase shift to; The input end of described constant current output circuit is connected with the output terminal of each electronic phase shifter in described phase-shift circuit;
One is connected to the infrared signal receiving circuit of the signal input of described single-chip microcomputer;
One infrared transmitter to described infrared signal receiving circuit transmission loss value gear signal.
In a preferred embodiment of the invention, on the signal input of described single-chip microcomputer, also connect a keyboard in order to input loss value gear signal.
In a preferred embodiment of the invention, the display delivery outlet at described single-chip microcomputer also connects one in order to show the display of the dielectric loss gear parameter of current setting.
Wireless remote-control simulation medium loss device in the present invention, has adopted current signal phase-shifting method to simulate different dielectric loss values, and input impedance is low, and the not impact of tested person wire length can not occur high voltage at standard capacitor measuring junction yet.What adopt due to phase shifting component is all resistance, the capacitor of Low Drift Temperature, can keep the stable of loss in room temperature range.What the gear shift of dielectric loss value adopted is electronic switch, and machinery-free gets an electric shock, safe and reliable.Gear-change operation can be used telepilot controlled in wireless, has guaranteed operating personnel's safety, has also improved work efficiency.
Accompanying drawing explanation
Fig. 1 is electric principle schematic of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with accompanying drawing, further set forth the present invention.
Referring to Fig. 1, a kind of simulation medium loss device that can wireless remote control shown in figure, comprises a single-chip microcomputer 100, and the chip of single-chip microcomputer 100 adopts C8051F120/2/3/6, C8051F130/2, C8051F020/2 model chip.Single-chip microcomputer 100 has several loss value gear output signal output terminals.
The input termination of signal conditioning circuit 200 flow through standard capacitor current signal and the current signal of the standard capacitor of flowing through carried out to digital-to-analog conversion become voltage signal output.
Phase-shift circuit 300 includes several electronic phase shifters 301,302 ... 30n, electronic phase shifter 301,302 ... 30n all adopts by operational amplifier OPA2277 and peripheral circuit and forms, electronic phase shifter 301,302 ... the input end of 30n is by electronic switching circuit 401,402 ... 40n is connected with the output terminal of signal conditioning circuit 200, electronic phase shifter 301,302 ... 30n connects with loss value gear output signal output terminal corresponding in single-chip microcomputer 100; The different loss value gear output signal of single-chip microcomputer 100 output, triggers different electronic phase shifter 301,302 ... 30n conducting, different electronic phase shifters 301,302 ... 30n is to carrying out phase shift by the voltage signal of input.Adopt electronic switching circuit 401,402 ... 40n, machinery-free gets an electric shock, safe and reliable.
Through electronic phase shifter 301,302 ... the voltage signal of 30n phase shift is by electronic phase shifter 301,302 ... the input end of the output terminal of 30n and constant current output circuit 500 is input in constant current output circuit 500, and constant current output circuit 500 is by electronic phase shifter 301,302 ... the voltage signal after phase shift of 30n output is transformed into the tested end that exports tested dielectric loss measuring instrument through the current signal of phase shift to.
The loss value gear output signal of single-chip microcomputer 100 outputs can be controlled by the infrared signal receiving circuit 600 or the keyboard 700 that are connected to the signal input of single-chip microcomputer 100.Infrared transmitter sends loss value gear signal or passes through keyboard 700 input loss value gear signal to infrared signal receiving circuit 600.Single-chip microcomputer 100, after computing, is exported different loss value gear output signals.Display delivery outlet at single-chip microcomputer 100 also connects one in order to show the display 800 of the dielectric loss gear parameter of current setting.
The key technical indexes of the present invention is as follows:
Nominal operation environment temperature: 0～40 ℃
Nominal operation ambient humidity: 30%～80%
Rated signal frequency: 50Hz, can be designed to other Frequency points as required
Working power: DC 16V, built-in rechargeable lithium ion batteries
Charger working power: 220V/50Hz
Input current scope: 100uA～100mA (can expand as required)
Output current scope: 100uA～100mA (can expand as required)
Output current error: ± 0.2% input current
Simulation dielectric loss error: ± (0.2% reading+0.0001)
Input impedance: 2 Ω
Load capacity :≤20 Ω.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (1)
1. a simulation medium loss device that can wireless remote control, is characterized in that, comprising:
One single-chip microcomputer, described single-chip microcomputer has several loss value gear output signal output terminals;
In order to the current signal of the standard capacitor of flowing through is converted to the signal conditioning circuit of voltage signal, the input end of described signal conditioning circuit is inputted the current signal of the standard capacitor of flowing through;
In order to the voltage signal of input is carried out to the phase-shift circuit of phase shift, described phase-shift circuit comprises some electronic phase shifters, wherein the input end of each electronic phase shifter is connected with the output terminal of described signal conditioning circuit by an electronic switching circuit, and the control end of each electronic switching circuit connects with the corresponding loss value gear output signal output terminal in described single-chip microcomputer;
In order to the voltage signal after phase shift of phase-shift circuit output is transformed into the constant current output circuit that exports the tested end of tested dielectric loss measuring instrument through the current signal of phase shift to; The input end of described constant current output circuit is connected with the output terminal of each electronic phase shifter in described phase-shift circuit;
One is connected to the infrared signal receiving circuit of the signal input of described single-chip microcomputer;
One infrared transmitter to described infrared signal receiving circuit transmission loss value gear signal;
On the signal input of described single-chip microcomputer, also connect a keyboard in order to input loss value gear signal;
Display delivery outlet at described single-chip microcomputer also connects one in order to show the display of the dielectric loss gear parameter of current setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110382027.8A CN102736049B (en) | 2011-11-25 | 2011-11-25 | Wireless-remote-control simulated dielectric loss device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110382027.8A CN102736049B (en) | 2011-11-25 | 2011-11-25 | Wireless-remote-control simulated dielectric loss device |
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| Publication Number | Publication Date |
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| CN102736049A CN102736049A (en) | 2012-10-17 |
| CN102736049B true CN102736049B (en) | 2014-11-19 |
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| CN201110382027.8A Expired - Fee Related CN102736049B (en) | 2011-11-25 | 2011-11-25 | Wireless-remote-control simulated dielectric loss device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018576B (en) * | 2012-12-03 | 2014-12-24 | 杭州西湖电子研究所 | Method for measuring dielectric loss factor and insulation resistance of power transformer |
| CN103760508B (en) * | 2013-11-28 | 2016-09-21 | 国家电网公司 | A kind of virtual medium loss device and detection method thereof |
| 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 |
| CN106157789A (en) * | 2015-04-17 | 2016-11-23 | 国网技术学院 | Relative dielectric loss and capacitance detection tutoring system |
| CN105319448A (en) * | 2015-11-13 | 2016-02-10 | 广州供电局有限公司 | A system and a method for simulating the dielectric loss of capacitive apparatuses in a high voltage environment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2070450U (en) * | 1990-04-17 | 1991-01-30 | 西宁供电局 | High-voltage ac electric bridge power source |
| EP0442898A1 (en) * | 1988-09-14 | 1991-08-28 | Presidium Promotions Ltd | Method and apparatus for measurement of capacitance and for capacitive measurement of displacement. |
| CN102121954A (en) * | 2009-12-10 | 2011-07-13 | 山东电力集团公司超高压公司 | Test device and test method for high-voltage dielectric loss |
| CN202330687U (en) * | 2011-11-25 | 2012-07-11 | 上海思创电器设备有限公司 | Dielectric loss simulating machine capable of being remotely controlled in wireless manner |
-
2011
- 2011-11-25 CN CN201110382027.8A patent/CN102736049B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0442898A1 (en) * | 1988-09-14 | 1991-08-28 | Presidium Promotions Ltd | Method and apparatus for measurement of capacitance and for capacitive measurement of displacement. |
| CN2070450U (en) * | 1990-04-17 | 1991-01-30 | 西宁供电局 | High-voltage ac electric bridge power source |
| CN102121954A (en) * | 2009-12-10 | 2011-07-13 | 山东电力集团公司超高压公司 | Test device and test method for high-voltage dielectric loss |
| CN202330687U (en) * | 2011-11-25 | 2012-07-11 | 上海思创电器设备有限公司 | Dielectric loss simulating machine capable of being remotely controlled in wireless manner |
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| CN102736049A (en) | 2012-10-17 |
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Inventor after: Yan Chunyu Inventor after: Li Jiong Inventor after: Gan Yuanfeng Inventor after: Zhu Bin Inventor after: Bi Jiangang Inventor after: Shi Yanjie Inventor after: Yuan Shuai Inventor after: Yang Yuan Inventor before: Yan Chunyu Inventor before: Li Jiong Inventor before: Gan Yuanfeng Inventor before: Zhu Bin Inventor before: Bi Jiangang Inventor before: Shi Yanjie Inventor before: Yuan Shuai Inventor before: Yang Yuan |
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