CN202886439U - Photoelectric isolation type transformation-ratio-adjustable voltage display device - Google Patents
Photoelectric isolation type transformation-ratio-adjustable voltage display device Download PDFInfo
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- CN202886439U CN202886439U CN 201220059870 CN201220059870U CN202886439U CN 202886439 U CN202886439 U CN 202886439U CN 201220059870 CN201220059870 CN 201220059870 CN 201220059870 U CN201220059870 U CN 201220059870U CN 202886439 U CN202886439 U CN 202886439U
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Abstract
The utility model discloses a photoelectric isolation type transformation-ratio-adjustable voltage display device. The photoelectric isolation type transformation-ratio-adjustable voltage display device comprises a high-voltage dividing sampling unit for dividing and sampling input voltage signals; a low pass filter removing noise of the sampling signals obtained by the high-voltage dividing sampling unit, an AD (analog-to-digital) conversion unit connected with the output end of the low pass filter, a signal processing unit electrically connected with the output end of the AD conversion unit and applied for processing the digital signals output by the AD conversion unit, and a display unit electrically connected with the signal processing unit and applied for displaying current values in a real-time manner. Voltage signals to be detected are input into the high-voltage dividing sampling unit through coaxial cables. The high-voltage dividing sampling unit emits sampling signals through fibers or in a wireless way. By making the high-voltage dividing sampling unit acquire the voltage signals to be detected through the coaxial cables and further emitting sampling signals through the fibers or in a wireless way, the voltage display device provided by the utility model achieves photoelectric isolation and increases safety performances.
Description
Technical field
The utility model relates to the adjustable voltage display device of a kind of photoelectricity isolation no-load voltage ratio, particularly convert digital signal after a kind of ac high-voltage dividing potential drop sampling to and send to the adjustable voltage display device of photoelectricity isolation no-load voltage ratio that main body is carried out demonstration and the data analysis of waveform by optical fiber, belong to electrical technology field.
Background technology
From the level that present high voltage measuring technology reaches, the proposed standard of International Electrotechnical Commission and the national standard of China all stipulate, except some special circumstances, the error of high voltage measuring generally should be controlled at ± 3% in.When tested voltage is very high, reaches this and require in fact and be not easy, so will will strictly control the error of each link of measuring system.
In order to find the defective of power transformer latency, transformer is when carrying out its induction withstand voltage and partial discharge test, need its primary voltage is calibrated before pressurization, actual institute adds primary voltage and must in strict accordance with the test procedure requirement, reduce as far as possible error.Only in this way, just can guarantee the standardization of testing and the validity of test result, for the reliability of power transformer reliability of operation and even whole electric system important meaning be arranged.And usually in order to measure high tension voltage, need to add voltage divider or measure from low-pressure side by no-load voltage ratio conversion.But all there is certain defective in these two kinds of methods in actual measurement.
Method of testing relatively more commonly used generally has two kinds now: a kind of is to measure at low pressure end then to calculate to high-pressure side according to no-load voltage ratio, and another method is to adopt voltage divider to measure.All there is certain problem in these two kinds of methods, wherein take low pressure end to measure, and then calculate to high-pressure side according to no-load voltage ratio, although measure conveniently, simply, the numerical value and the actual value difference that calculate after measuring are larger, poor accuracy; Although adopting voltage divider to measure than the low pressure end measurement wants accurately, but operating personnel will go up the bushing top during its wiring, unfavorable to trouble free service, also having in addition a problem is when voltage is higher, bushing can occur corona to measuring between the divider resistance above the lead-in wire, all can be influential to safety and measurement instrument precision.
The kilovoltmeter of prior art mainly contains following deficiency:
1, the parameter group number is on the low side, can't store simultaneously multi-group data;
2, display screen is less than normal, the inadequate hommization in interface;
3, interface button is on the low side, and it is extremely inconvenient to operate;
Above-mentioned problem is so that existing kilovoltmeter can not satisfy the existing requirement that requires high intelligence, high stability and high ease for use aspect.
The utility model content
Technical matters for above-mentioned existence the objective of the invention is: proposed to convert to after a kind of ac high-voltage dividing potential drop is sampled digital signal and sent to the adjustable voltage display device of photoelectricity isolation no-load voltage ratio that receiver carries out demonstration and the data analysis of waveform by optical fiber.
Technical solution of the present invention is achieved in that the adjustable voltage display device of a kind of photoelectricity isolation no-load voltage ratio, comprises the high pressure dividing potential drop sampling unit of sampling for the voltage signal dividing potential drop of input, the sampled signal of described high pressure dividing potential drop sampling unit acquisition is removed the low-pass filter of noise, the AD conversion unit that is connected with the output terminal of described low-pass filter, be electrically connected for the treatment of the signal processing unit of the digital signal of AD conversion unit output with described AD conversion unit output terminal, be electrically connected for the display unit that shows in real time current value with described signal processing unit; Described high pressure dividing potential drop sampling unit is inputted tested voltage signal by concentric cable; Described high pressure dividing potential drop sampling unit is by optical fiber or wireless transmit sampled signal.
Preferably, described high pressure dividing potential drop sampling unit uses the AVR single-chip microcomputer to cooperate high-performance A/D change-over circuit, gathers HT waveform.
Preferably, described display unit uses S3C2440 chip operation WINCE 5.0 operating systems, the AVR single-chip microcomputer of SAMSUNG to use AVR STUDIO development platform, finishes the high tension voltage sampling, and digital waveform sends and battery management.
Because the utilization of technique scheme, the utility model compared with prior art has following advantages:
The adjustable voltage display device of photoelectricity isolation no-load voltage ratio described in the utility model, all improve to some extent, use digital data transmission in sampling and display part, guarantee correctness, the advanced power management algorithm of use that data send, so that kilovoltmeter has longer stream time; Simultaneously, described high pressure dividing potential drop sampling unit obtains tested voltage signal by concentric cable; Then by optical fiber or wireless transmit sampled signal, realize the photoelectricity isolation, improved security performance.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
The connection diagram that accompanying drawing 2 for the test job of the adjustable voltage display device of photoelectricity isolation no-load voltage ratio described in the utility model is;
Wherein: 1, bushing; 2, multiplication of voltage bucket.
Embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
Such as the adjustable voltage display device of accompanying drawing 1 described a kind of photoelectricity isolation no-load voltage ratio, comprise the high pressure dividing potential drop sampling unit of sampling for the voltage signal dividing potential drop of input, the sampled signal of described high pressure dividing potential drop sampling unit acquisition is removed the low-pass filter of noise, the AD conversion unit that is connected with the output terminal of described low-pass filter, be electrically connected for the treatment of the signal processing unit of the digital signal of AD conversion unit output with described AD conversion unit output terminal, be electrically connected for the display unit that shows in real time current value with described signal processing unit; Described high pressure dividing potential drop sampling unit is inputted tested voltage signal by concentric cable; Described high pressure dividing potential drop sampling unit is by optical fiber or wireless transmit sampled signal.Described high pressure dividing potential drop sampling unit uses the AVR single-chip microcomputer to cooperate high-performance A/D change-over circuit, gathers HT waveform.Described display unit uses S3C2440 chip operation WINCE5.0 operating system, the AVR single-chip microcomputer of SAMSUNG to use AVR STUDIO development platform, finishes the high tension voltage sampling, and digital waveform sends and battery management.
The connection diagram that for the test job of the adjustable voltage display device of photoelectricity isolation no-load voltage ratio described in the utility model is as shown in Figure 2; As shown in the figure, an end of bushing 1 is connected with an end of multiplication of voltage bucket 2; The other end ground connection of described multiplication of voltage bucket 2; The other end of described bushing 1 applies test voltage; Described high pressure dividing potential drop sampling unit is communicated with wire between bushing 1 and the multiplication of voltage bucket 2 by concentric cable; Described high pressure dividing potential drop sampling unit is electrically connected with voltage display device main body by optical fiber.Because bushing 1 is on the tested transformer, its capacitor C
1Be known, and the electric capacity of multiplication of voltage bucket 2 can be regulated by the adjustable voltage display device of photoelectricity isolation no-load voltage ratio described in the utility model, thereby the capacitor C of multiplication of voltage bucket 2
2Also be as can be known; Known to accompanying drawing 2: no-load voltage ratio=(C
1+ C
2)/C
2, the capacitor C of regulating multiplication of voltage bucket 2
2Can realize the adjusting to no-load voltage ratio; If the voltage of multiplication of voltage bucket is measured, can converse the measuring voltage that is applied on the bushing 1, i.e. voltage * the no-load voltage ratio of measuring voltage=multiplication of voltage bucket.
Because the utilization of technique scheme, the utility model compared with prior art has following advantages:
The adjustable voltage display device of photoelectricity isolation no-load voltage ratio described in the utility model, all improve to some extent, use digital data transmission in sampling and display part, guarantee correctness, the advanced power management algorithm of use that data send, so that kilovoltmeter has longer stream time; Simultaneously, described high pressure dividing potential drop sampling unit obtains tested voltage signal by concentric cable; Then by optical fiber or wireless transmit sampled signal, realize the photoelectricity isolation, improved security performance.
Above-described embodiment only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage that is familiar with technique can understand content of the present utility model and is implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed in the protection domain of the present utility model.
Claims (3)
1. the adjustable voltage display device of photoelectricity isolation no-load voltage ratio is characterized in that: comprise the high pressure dividing potential drop sampling unit of sampling for the voltage signal dividing potential drop of input, the sampled signal of described high pressure dividing potential drop sampling unit acquisition is removed the low-pass filter of noise, the AD conversion unit that is connected with the output terminal of described low-pass filter, be electrically connected for the treatment of the signal processing unit of the digital signal of AD conversion unit output with described AD conversion unit output terminal, be electrically connected for the display unit that shows in real time current value with described signal processing unit; Described high pressure dividing potential drop sampling unit is inputted tested voltage signal by concentric cable; Described high pressure dividing potential drop sampling unit is by optical fiber or wireless transmit sampled signal.
2. photoelectricity according to claim 1 is isolated the adjustable voltage display device of no-load voltage ratio; It is characterized in that: described high pressure dividing potential drop sampling unit uses the AVR single-chip microcomputer to cooperate high-performance A/D change-over circuit, gathers HT waveform.
3. photoelectricity according to claim 1 is isolated the adjustable voltage display device of no-load voltage ratio, it is characterized in that: described display unit uses S3C2440 chip operation WINCE5.0 operating system, the AVR single-chip microcomputer of SAMSUNG to use AVR STUDIO development platform, finish the high tension voltage sampling, digital waveform sends and battery management.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220059870 CN202886439U (en) | 2012-02-23 | 2012-02-23 | Photoelectric isolation type transformation-ratio-adjustable voltage display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220059870 CN202886439U (en) | 2012-02-23 | 2012-02-23 | Photoelectric isolation type transformation-ratio-adjustable voltage display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886439U true CN202886439U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220059870 Expired - Fee Related CN202886439U (en) | 2012-02-23 | 2012-02-23 | Photoelectric isolation type transformation-ratio-adjustable voltage display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034941A (en) * | 2014-06-11 | 2014-09-10 | 台达电子企业管理（上海）有限公司 | Voltage sampling system |
| CN112649660A (en) * | 2020-12-04 | 2021-04-13 | 国网新疆电力有限公司电力科学研究院 | High-voltage measurement isolating device and high-voltage measurement system |
-
2012
- 2012-02-23 CN CN 201220059870 patent/CN202886439U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034941A (en) * | 2014-06-11 | 2014-09-10 | 台达电子企业管理（上海）有限公司 | Voltage sampling system |
| US9797932B2 (en) | 2014-06-11 | 2017-10-24 | Delta Electronics (Shanghai) Co., Ltd. | Voltage sampling system |
| CN112649660A (en) * | 2020-12-04 | 2021-04-13 | 国网新疆电力有限公司电力科学研究院 | High-voltage measurement isolating device and high-voltage measurement system |
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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: 20130417 Termination date: 20150223 |
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| EXPY | Termination of patent right or utility model |