CN105137312A - Transformer partial discharge ultrahigh frequency detection device - Google Patents
Transformer partial discharge ultrahigh frequency detection device Download PDFInfo
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- CN105137312A CN105137312A CN201510686931.6A CN201510686931A CN105137312A CN 105137312 A CN105137312 A CN 105137312A CN 201510686931 A CN201510686931 A CN 201510686931A CN 105137312 A CN105137312 A CN 105137312A
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Abstract
The invention relates to a transformer partial discharge ultrahigh frequency detection device, which comprises a transmission line. The input end of the transmission line is connected with an ultrahigh frequency antenna; the output end of the transmission line is connected with a frequency mixing conditioning unit; the output end of the frequency mixing conditioning unit is connected with a data acquisition card; the input end of the data acquisition card is connected with the frequency mixing conditioning unit and an I/O interface; the output end of the data acquisition card is connected with an industrial control PC terminal; the input end of the industrial control PC terminal is connected with the data acquisition card; the output end of the industrial control PC terminal is connected with the I/O interface; the input source of the ultrahigh frequency antenna is a discharge signal; and the main body of the frequency mixing conditioning unit is composed of an amplitude limiter, a reamplifier, a frequency mixing device, an intermediate frequency amplifier, a low pass filter, a detection logarithmic amplifier, an output interface, a PC parallel port, a frequency synthesizer and an input interface. The transformer partial discharge ultrahigh frequency detection device has the advantages that interference can be resisted, information can be comprehensively and accurately acquired, the technology is advanced, and the automatic degree is high.
Description
Technical field
The invention belongs to partial discharge of transformer detection technique field, be specifically related to a kind of transformer partial discharge super high frequency detector.
Background technology
Along with the growth of the installed capacity of electric power transport, more and more higher to the requirement of the security of powering, reliability, therefore on-line monitoring and fault diagonosing must be carried out to the duty of allocation transformer equipment especially transformer, the normal operation of equipment can be ensured, be convenient to again the maintenance of equipment, and the local discharge superhigh frequency detection of transformer is the key issue of office's electric discharge always, especially its frequency is high, the duration is short, interference source is more, therefore needs a kind of transformer partial discharge super high frequency detector.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and provide a kind of anti-interference, Information Monitoring comprehensively accurately, transformer partial discharge super high frequency detector that advanced technology, automaticity are high.
The object of the present invention is achieved like this: a kind of transformer partial discharge super high frequency detector, it comprises transmission line, the input end of described transmission line is connected with ultra-high frequency antenna, the output terminal of described transmission line is connected with mixing conditioning unit, the output terminal of described mixing conditioning unit is connected with data collecting card, the input end of described data collecting card is connected with mixing conditioning unit and I/O interface, the output terminal of described data collecting card is connected with industry PC terminal, the input end of described industry PC terminal is connected with data collecting card, the output terminal of described industry PC terminal is connected with I/O interface, the input source of described ultra-high frequency antenna is discharge signal, the main body of described mixing conditioning unit is made up of limiter, prime amplifier, hybrid frequency device, intermediate frequency amplifier, low-pass filter, demodulating logarithmic amplifier, output interface, PC parallel port, frequency synthesizer, input interface, and described input interface is connected with prime amplifier and limiter, described limiter one end connects input interface, and the other end of limiter connects the earth, the input end of described prime amplifier is connected with input interface, and the output terminal of prime amplifier is connected with hybrid frequency device, the input end of described hybrid frequency device is connected with prime amplifier and frequency synthesizer, and the output terminal of hybrid frequency device is connected with intermediate frequency amplifier, the output terminal of described intermediate frequency amplifier is connected with low-pass filter, and the input end of intermediate frequency amplifier is connected with hybrid frequency device, the output terminal of described low-pass filter is connected with demodulating logarithmic amplifier, and the input end of low-pass filter is connected with intermediate frequency amplifier and PC parallel port, the input end of described demodulating logarithmic amplifier is connected with low-pass filter, and the output terminal of demodulating logarithmic amplifier is connected with output interface.
Described transmission line is cable or optical fiber.
The frequency band range of described prime amplifier is 0 to 1000MHz.
Described hybrid frequency device local oscillator input range is 10MHz to 2GHz.
The centre frequency of described frequency synthesizer is 200 to 1000MHz.
The bandwidth of described low-pass filter is provided with 10MHz, 20MHz, 40MHz, 80MHz, 100MHz gear.
Beneficial effect of the present invention: the present invention constitutes a kind of transformer partial discharge super high frequency detector by adopting ultra-high frequency antenna, transmission line, mixing conditioning unit, data collecting card, industry PC terminal, I/O interface, has anti-interference, that Information Monitoring is comprehensive accurately, advanced technology, automaticity are high advantage; The hybrid frequency device that the present invention is arranged, local discharge signal ultrahigh frequency component is extracted by frequency mixing technique, peak value and phase characteristic can be had by stick signal envelope, again reduce the frequency of ultra-high frequency signal, the central frequency range of effective extraction is wide, has strong interference immunity, advantage that discharge information is abundant; The limiter that the present invention is arranged, can prevent transient state high-energy from damaging mixing conditioning unit and data collecting card, has that security is high, cost is low, the advantage of practical function; The prime amplifier that the present invention is arranged, there is the effect of amplifying signal, ensure that the power magnitude of discharge signal signal when arriving mixing conditioning unit through transmission is in the input range required, its frequency band range is 0 to 1000MHz, has that wide coverage, cost are low, the advantage of practical function; The hybrid frequency device local oscillator input range that the present invention is arranged is 10MHz to 2GHz, is mainly frequency reducing effect, has that wide coverage, cost are low, the advantage of practical function; The intermediate-freuqncy signal that the intermediate frequency amplifier that the present invention is arranged is mainly used in mixing exports is amplified, and is convenient to subsequent treatment, has the advantage that the simple cost of structure is low; The centre frequency of the frequency synthesizer that the present invention is arranged is 200 to 1000MHz, exports the local oscillation signal met the demands, is adjusted, have the advantage that scope is wide, cost is low by computer parallel interface to frequency synthesizer; The bandwidth of low-pass filter that the present invention is arranged is provided with 10MHz, 20MHz, 40MHz, 80MHz, 100MHz gear, have that scope is wide, cost is low, digitizing, advantage that precision is high; Total the present invention, has anti-interference, that Information Monitoring is comprehensive accurately, advanced technology, automaticity are high advantage.
Accompanying drawing explanation
Fig. 1 is the hybrid frequency apparatus structure schematic diagram of a kind of transformer partial discharge super high frequency detector of the present invention.
Fig. 2 is the system architecture schematic diagram of a kind of transformer partial discharge super high frequency detector of the present invention.
In figure: 1, limiter 2, prime amplifier 3, hybrid frequency device 4, intermediate frequency amplifier 5, low-pass filter 6, demodulating logarithmic amplifier 7, output interface 8, PC parallel port 9, frequency synthesizer 10, input interface.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
Embodiment 1
As Fig. 1, shown in Fig. 2, a kind of transformer partial discharge super high frequency detector, it comprises transmission line, the input end of described transmission line is connected with ultra-high frequency antenna, the output terminal of described transmission line is connected with mixing conditioning unit, the output terminal of described mixing conditioning unit is connected with data collecting card, the input end of described data collecting card is connected with mixing conditioning unit and I/O interface, the output terminal of described data collecting card is connected with industry PC terminal, the input end of described industry PC terminal is connected with data collecting card, the output terminal of described industry PC terminal is connected with I/O interface, the input source of described ultra-high frequency antenna is discharge signal, the main body of described mixing conditioning unit is made up of limiter 1, prime amplifier 2, hybrid frequency device 3, intermediate frequency amplifier 4, low-pass filter 5, demodulating logarithmic amplifier 6, output interface 7, PC parallel port 8, frequency synthesizer 9, input interface 10, and described input interface 10 is connected with prime amplifier 2 and limiter 1, described limiter 1 one end connects input interface 10, and the other end of limiter 1 connects the earth, the input end of described prime amplifier 2 is connected with input interface 10, and the output terminal of prime amplifier 2 is connected with hybrid frequency device 3, the input end of described hybrid frequency device 3 is connected with prime amplifier 2 and frequency synthesizer 9, and the output terminal of hybrid frequency device 3 is connected with intermediate frequency amplifier 4, the output terminal of described intermediate frequency amplifier 4 is connected with low-pass filter 5, and the input end of intermediate frequency amplifier 4 is connected with hybrid frequency device 3, the output terminal of described low-pass filter 5 is connected with demodulating logarithmic amplifier 6, and the input end of low-pass filter 5 is connected with intermediate frequency amplifier 4 and PC parallel port 8, the input end of described demodulating logarithmic amplifier 6 is connected with low-pass filter 5, and the output terminal of demodulating logarithmic amplifier 6 is connected with output interface 7.
During the invention process, first by adopting limiter, prime amplifier, hybrid frequency device, intermediate frequency amplifier, low-pass filter, demodulating logarithmic amplifier, output interface, PC parallel port, frequency synthesizer, input interface composition mixing conditioning unit, then ultra-high frequency antenna is connected mixing conditioning unit by transmission line, then mixing conditioning unit successively connection data capture card, industry PC terminal, then industry PC terminal is passed through I/O interfacing data capture card; Present invention achieves that bandwidth is optional, the bandpass filter of regulable center frequency, local discharge superhigh frequency signal is adjusted centre frequency by frequency reducing, under stick signal peak value and phase characteristic, there is applied widely, that the simple cost of structure is low, practical advantage; The present invention adopts frequency mixing technique effectively can extract transformer typical case office and puts the ultra high frequency discharge signal of model, has high, applied widely, the jamproof advantage of precision; The present invention is by the centre frequency composition mixing conditioning unit of hybrid frequency device, limiter, prime amplifier, intermediate frequency amplifier, frequency synthesizer, low-pass filter, hybrid frequency device extracts local discharge signal ultrahigh frequency component by frequency mixing technique, frequency of heart scope is wide, strong interference immunity; Limiter can prevent transient state high-energy from damaging mixing conditioning unit and data collecting card, security is high, cost is low, practical function, the prime amplifier wherein arranged, hybrid frequency device, intermediate frequency amplifier, frequency synthesizer, low-pass filter, comprehensively have that wide coverage, cost are low, practical function, structure simple, digitizing, advantage that precision is high; Total the present invention, has anti-interference, that Information Monitoring is comprehensive accurately, advanced technology, automaticity are high advantage.
Embodiment 2
As Fig. 1, shown in Fig. 2, a kind of transformer partial discharge super high frequency detector, it comprises transmission line, the input end of described transmission line is connected with ultra-high frequency antenna, the output terminal of described transmission line is connected with mixing conditioning unit, the output terminal of described mixing conditioning unit is connected with data collecting card, the input end of described data collecting card is connected with mixing conditioning unit and I/O interface, the output terminal of described data collecting card is connected with industry PC terminal, the input end of described industry PC terminal is connected with data collecting card, the output terminal of described industry PC terminal is connected with I/O interface, the input source of described ultra-high frequency antenna is discharge signal, the main body of described mixing conditioning unit is made up of limiter 1, prime amplifier 2, hybrid frequency device 3, intermediate frequency amplifier 4, low-pass filter 5, demodulating logarithmic amplifier 6, output interface 7, PC parallel port 8, frequency synthesizer 9, input interface 10, and described input interface 10 is connected with prime amplifier 2 and limiter 1, described limiter 1 one end connects input interface 10, and the other end of limiter 1 connects the earth, the input end of described prime amplifier 2 is connected with input interface 10, and the output terminal of prime amplifier 2 is connected with hybrid frequency device 3, the input end of described hybrid frequency device 3 is connected with prime amplifier 2 and frequency synthesizer 9, and the output terminal of hybrid frequency device 3 is connected with intermediate frequency amplifier 4, the output terminal of described intermediate frequency amplifier 4 is connected with low-pass filter 5, and the input end of intermediate frequency amplifier 4 is connected with hybrid frequency device 3, the output terminal of described low-pass filter 5 is connected with demodulating logarithmic amplifier 6, and the input end of low-pass filter 5 is connected with intermediate frequency amplifier 4 and PC parallel port 8, the input end of described demodulating logarithmic amplifier 6 is connected with low-pass filter 5, the output terminal of demodulating logarithmic amplifier 6 is connected with output interface 7, described transmission line is cable or optical fiber, the frequency band range of described prime amplifier 2 is 0 to 1000MHz, described hybrid frequency device 3 local oscillator input range is 10MHz to 2GHz, the centre frequency of described frequency synthesizer 9 is 200 to 1000MHz, and the bandwidth of described low-pass filter 5 is provided with 10MHz, 20MHz, 40MHz, 80MHz, 100MHz gear.
During the invention process, first by adopting limiter, prime amplifier, hybrid frequency device, intermediate frequency amplifier, low-pass filter, demodulating logarithmic amplifier, output interface, PC parallel port, frequency synthesizer, input interface composition mixing conditioning unit, then ultra-high frequency antenna is connected mixing conditioning unit by transmission line, then mixing conditioning unit successively connection data capture card, industry PC terminal, then industry PC terminal is passed through I/O interfacing data capture card; Present invention achieves that bandwidth is optional, the bandpass filter of regulable center frequency, local discharge superhigh frequency signal is adjusted centre frequency by frequency reducing, under stick signal peak value and phase characteristic, there is applied widely, that the simple cost of structure is low, practical advantage; The present invention adopts frequency mixing technique effectively can extract transformer typical case office and puts the ultra high frequency discharge signal of model, has high, applied widely, the jamproof advantage of precision; The prime amplifier that the present invention is arranged, there is the effect of amplifying signal, ensure that the power magnitude of discharge signal signal when arriving mixing conditioning unit through transmission is in the input range required, its frequency band range is 0 to 1000MHz, has that wide coverage, cost are low, the advantage of practical function; The hybrid frequency device local oscillator input range that the present invention is arranged is 10MHz to 2GHz, is mainly frequency reducing effect, has that wide coverage, cost are low, the advantage of practical function; The intermediate-freuqncy signal that the intermediate frequency amplifier that the present invention is arranged is mainly used in mixing exports is amplified, and is convenient to subsequent treatment, has the advantage that the simple cost of structure is low; The centre frequency of the frequency synthesizer that the present invention is arranged is 200 to 1000MHz, exports the local oscillation signal met the demands, is adjusted, have the advantage that scope is wide, cost is low by computer parallel interface to frequency synthesizer; The bandwidth of low-pass filter that the present invention is arranged is provided with 10MHz, 20MHz, 40MHz, 80MHz, 100MHz gear, have that scope is wide, cost is low, digitizing, advantage that precision is high; Total the present invention, has anti-interference, that Information Monitoring is comprehensive accurately, advanced technology, automaticity are high advantage.
Claims (6)
1. a transformer partial discharge super high frequency detector, it comprises transmission line, it is characterized in that: the input end of described transmission line is connected with ultra-high frequency antenna, the output terminal of described transmission line is connected with mixing conditioning unit, the output terminal of described mixing conditioning unit is connected with data collecting card, the input end of described data collecting card is connected with mixing conditioning unit and I/O interface, the output terminal of described data collecting card is connected with industry PC terminal, the input end of described industry PC terminal is connected with data collecting card, the output terminal of described industry PC terminal is connected with I/O interface, the input source of described ultra-high frequency antenna is discharge signal,
The main body of described mixing conditioning unit is made up of limiter, prime amplifier, hybrid frequency device, intermediate frequency amplifier, low-pass filter, demodulating logarithmic amplifier, output interface, PC parallel port, frequency synthesizer, input interface, and described input interface is connected with prime amplifier and limiter; Described limiter one end connects input interface, and the other end of limiter connects the earth; The input end of described prime amplifier is connected with input interface, and the output terminal of prime amplifier is connected with hybrid frequency device; The input end of described hybrid frequency device is connected with prime amplifier and frequency synthesizer, and the output terminal of hybrid frequency device is connected with intermediate frequency amplifier; The output terminal of described intermediate frequency amplifier is connected with low-pass filter, and the input end of intermediate frequency amplifier is connected with hybrid frequency device; The output terminal of described low-pass filter is connected with demodulating logarithmic amplifier, and the input end of low-pass filter is connected with intermediate frequency amplifier and PC parallel port; The input end of described demodulating logarithmic amplifier is connected with low-pass filter, and the output terminal of demodulating logarithmic amplifier is connected with output interface.
2. a kind of transformer partial discharge super high frequency detector as claimed in claim 1, is characterized in that: described transmission line is cable or optical fiber.
3. a kind of transformer partial discharge super high frequency detector as claimed in claim 1, is characterized in that: the frequency band range of described prime amplifier is 0 to 1000MHz.
4. a kind of transformer partial discharge super high frequency detector as claimed in claim 1, is characterized in that: described hybrid frequency device local oscillator input range is 10MHz to 2GHz.
5. a kind of transformer partial discharge super high frequency detector as claimed in claim 1, is characterized in that: the centre frequency of described frequency synthesizer is 200 to 1000MHz.
6. a kind of transformer partial discharge super high frequency detector as claimed in claim 1, is characterized in that: the bandwidth of described low-pass filter is provided with 10MHz, 20MHz, 40MHz, 80MHz, 100MHz gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510686931.6A CN105137312A (en) | 2015-10-22 | 2015-10-22 | Transformer partial discharge ultrahigh frequency detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510686931.6A CN105137312A (en) | 2015-10-22 | 2015-10-22 | Transformer partial discharge ultrahigh frequency detection device |
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| CN105137312A true CN105137312A (en) | 2015-12-09 |
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| CN201510686931.6A Pending CN105137312A (en) | 2015-10-22 | 2015-10-22 | Transformer partial discharge ultrahigh frequency detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483435A (en) * | 2016-11-24 | 2017-03-08 | 国网新疆电力公司电力科学研究院 | Transformer belt electric detection means |
| CN113419151A (en) * | 2021-07-15 | 2021-09-21 | 贵州电网有限责任公司 | Portable fault insulator online detection device and detection method |
| CN113820553A (en) * | 2021-08-24 | 2021-12-21 | 中国农业大学 | Signal processing device for detecting partial discharge of high-voltage switch cabinet based on ultrahigh frequency |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201788255U (en) * | 2010-08-19 | 2011-04-06 | 河南省电力公司郑州供电公司 | Partial discharge ultra-high frequency online detecting system |
| CN202583398U (en) * | 2012-02-16 | 2012-12-05 | 安徽理工大学 | Mixing technology based partial discharge signal collection apparatus |
| CN205038299U (en) * | 2015-10-22 | 2016-02-17 | 国网河南禹州市供电公司 | Transformer partial discharge hyperfrequency detection device |
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2015
- 2015-10-22 CN CN201510686931.6A patent/CN105137312A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201788255U (en) * | 2010-08-19 | 2011-04-06 | 河南省电力公司郑州供电公司 | Partial discharge ultra-high frequency online detecting system |
| CN202583398U (en) * | 2012-02-16 | 2012-12-05 | 安徽理工大学 | Mixing technology based partial discharge signal collection apparatus |
| CN205038299U (en) * | 2015-10-22 | 2016-02-17 | 国网河南禹州市供电公司 | Transformer partial discharge hyperfrequency detection device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483435A (en) * | 2016-11-24 | 2017-03-08 | 国网新疆电力公司电力科学研究院 | Transformer belt electric detection means |
| CN113419151A (en) * | 2021-07-15 | 2021-09-21 | 贵州电网有限责任公司 | Portable fault insulator online detection device and detection method |
| CN113419151B (en) * | 2021-07-15 | 2022-07-01 | 贵州电网有限责任公司 | Portable fault insulator online detection device and detection method |
| CN113820553A (en) * | 2021-08-24 | 2021-12-21 | 中国农业大学 | Signal processing device for detecting partial discharge of high-voltage switch cabinet based on ultrahigh frequency |
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Application publication date: 20151209 |