CN103353554A - Casing pipe dielectric loss measuring instrument - Google Patents
Casing pipe dielectric loss measuring instrument Download PDFInfo
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- CN103353554A CN103353554A CN2013103005229A CN201310300522A CN103353554A CN 103353554 A CN103353554 A CN 103353554A CN 2013103005229 A CN2013103005229 A CN 2013103005229A CN 201310300522 A CN201310300522 A CN 201310300522A CN 103353554 A CN103353554 A CN 103353554A
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Abstract
The invention relates to a casing pipe dielectric loss measuring instrument. The measuring instrument is characterized in that a measurement sampling unit is comprised; a terminal analysis unit forms signal connection with the measurement sampling unit; the measurement sampling unit comprises a synchronization acquisition unit, a signal processing unit which forms the signal connection with the synchronization acquisition unit and a signal output unit which forms the signal connection with the signal processing unit; the signal output unit is provided with a first bluetooth module; the terminal analysis unit is provided with a second bluetooth module which forms the signal connection with the first bluetooth module. The measuring instrument of the invention has the advantages that data acquisition and bluetooth technologies are integrated; under the condition that there is no power failure and safety is guaranteed, a dielectric loss value of each phase casing pipe of transformers at different places can be effectively and accurately measured in real time; the casing pipe dielectric loss can be timely and accurately measured, which is convenient for timely carrying out subsequent maintenance working; defects are eliminated; an end screen grounding accident which can be generated is avoided; a time period with electricity is greatly prolonged.
Description
Technical field
The present invention relates to a kind of sleeve pipe dielectric loss measurement instrument.
Background technology
Can cause that the sleeve pipe insulating property are impaired if bushing shell for transformer makes moist, when serious sleeve pipe is blasted, therefore, whether measuring transformer sleeve pipe dielectric loss is differentiated sleeve pipe and is made moist, and the normal operation of transformer is played vital effect.Present measuring method is generally cycle maintenance power failure and measures, but along with the fast-developing of electrical network and to improving constantly that power supply reliability requires, traditional cycle maintenance model can not adapt to the power network development requirement, the electric system maintenance model is progressively from the cycle maintenance to the repair based on condition of component transition, and the target of repair based on condition of component is by strengthening detection and the supervision to online equipment state, the online detection adopted the clamp on amperemeter image data at present, the data acquisition weak effect, error is larger, causes reliability low.
Present on-line monitoring adopts the form of wire transmission more, time has been grown and a series of problems such as transmission line ruptures, wears out will occur, affect the collection of data, measure inaccurate, can not accurately judge the sleeve pipe degree of making moist, form easily transformer end shield open circuit, produce suspended discharge, produce serious consequence.
Summary of the invention
The object of the invention is to address the above problem and a kind of sleeve pipe dielectric loss measurement instrument is provided, integrate data acquisition and Bluetooth technology, can be in the situation that does not have a power failure, guarantees safety, in real time, measure effectively, accurately three-phase dielectric loss value, can promptly and accurately measure the sleeve pipe dielectric loss, convenient follow-up maintenance job is in time carried out, and avoids the end shield ground fault that may cause.
The present invention solves the technical scheme that the prior art problem adopts: sleeve pipe dielectric loss measurement instrument, it is characterized in that comprising the measurement sampling unit, with measure that the sampling unit signal is connected be provided with the terminal analysis unit, described measurement sampling unit comprises the synchronous acquisition unit, the signal processing unit that is connected with the synchronous acquisition cell signal, the signal output unit that is connected with the signal processing unit signal, be provided with the first bluetooth module in the described signal output unit, be provided with the second bluetooth module that is connected with the first bluetooth module signal in the described terminal analysis unit.At present Wireless Data Transmission has far-infrared technique and GPRS technology, and the defective of these technology maximums be that transfer rate is on the low side, be disturbed large etc.
Bluetooth module is the 2.4GHz frequency range (ultrahigh frequency) that is operated in global general-use, avoided the interference of electromagnetic field in the transformer station, simultaneously Bluetooth quick affirmation and the exhibition technology of frequency modulation frequently, use this technology can at utmost avoid multiple devices to use simultaneously identical frequency to transmit, use this technology, every equipment all will use in the specified scope 79 separately and the frequency of selecting at random, simultaneously change to another frequency from a frequency regularly, and in the process of the transmission of data, can not be subject to the interference of buildings, have powerful antijamming capability.Therefore, adopt Bluetooth technology, so that data transmission rate, the powerful advantages such as anti-interference solve the problem that prior art exists fast.The present average transmission rate of bluetooth module is 1Mb/s, and along with updating of technology, the transfer rate of bluetooth is also in continuous improve, and some can reach 2 Mb/s～3 Mb/s, and this is that other transmission modes are incomparable.In addition, bluetooth can not produce any communication fee in data transmission procedure, economy and practical.
Measure sampling unit and be connected with three of sleeve pipe respectively, can gather simultaneously the bottom shielding of bushing dielectric loss data of each phase of transformer, carry out better alternate Data Comparison, by the comparison of electric capacity and dielectric loss, judge that more accurately which is out of order mutually.
As the further of technique scheme improved and replenish, the present invention adopts following technical measures: described measurement sampling unit is arranged in the betal can, and described betal can is provided with earth terminal.
Described signal processing unit comprises that the A/D converter that is connected with the synchronous acquisition cell signal, the Logic control module that is connected with the A/D converter signal be connected locating module, the clock module that is connected with the digital signal processing module signal and the dual port RAM module that the andlogic control module is connected with the digital signal processing module signal with digital signal processing module, described signal output unit comprises the single-chip microcomputer that is connected with the dual port RAM module by signal, and described bluetooth module is arranged in the single-chip microcomputer.Double-core RAM module can be processed large batch of data simultaneously, without time-delay, guarantees the quick, accurate of data acquisition.
Described locating module is the GRS module.Adopt the GPS module as synchronous clock, guarantee the synchronous acquisition of data, be conducive to the Real Time Monitoring of terminal analysis unit, faster, find data exception more accurately, in time fix a breakdown, for electrical network continues, stable power supply provides safeguard.
Described synchronous acquisition unit comprise transducer, the low-pass filter that is connected with transducer signal, the programmable amplifier that is connected with the low-pass filter signal, the active filter that is connected with the programmable amplifier signal, with the level displacement circuit that the active filter signal is connected, described level displacement circuit is connected with the A/D converter signal.
Described digital signal processing module also is electrically connected with power module, is connected with reset-circuit signal, is connected with the jtag interface signal.
Described terminal analysis unit is arranged on the terminal PC.
The beneficial effect that the present invention has: integrate data acquisition and Bluetooth technology, can be in the situation that does not have a power failure, guarantees safety, measure effectively, accurately in real time, the dielectric loss value of each phase sleeve pipe of the transformer of different location, can promptly and accurately measure the sleeve pipe dielectric loss, convenient follow-up maintenance job is in time carried out, eliminate defective, avoid the end shield ground fault that may cause, also greatly improved not power off time.Adopt Bluetooth wireless transmission greatly to improve the staff in the safety coefficient of carrying out on-line measurement, ensure the safety of the person, equipment, electrical network.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Embodiment:Sleeve pipe dielectric loss measurement instrument, as shown in Figure 1, it comprises the measurement sampling unit, with measure that the sampling unit signal is connected be provided with the terminal analysis unit.Measure sampling unit and be arranged in the betal can 5, betal can 5 is provided with earth terminal, and terminal analysis unit 4 is arranged on the terminal PC.
Measure sampling unit and comprise synchronous acquisition unit 1, the signal processing unit 2 that is connected with synchronous acquisition unit 1 signal, the signal output unit 3 that is connected with signal processing unit 2 signals.Be provided with the first bluetooth module 31 in the signal output unit 3.Be provided with the second bluetooth module 41 that is connected with the first bluetooth module 31 signals in the terminal analysis unit 4.
Signal processing unit 2 comprises that the A/D converter 21 that is connected with synchronous acquisition unit 1 signal, the Logic control module 22 that is connected with the A/D converter signal are connected with digital signal processing module, andlogic control module 22 is connected location (GRS) module 24 of signal connection, clock module 25 and the dual port RAM module 26 that is connected with digital signal processing module 24 signals with digital signal processing module, described signal output unit 3 comprises the single-chip microcomputer 32 that is connected with dual port RAM module 26 signals, and described the first bluetooth module 31 is arranged in the single-chip microcomputer 32.Digital signal processing module 2 also is electrically connected with power module 25, is connected with reset circuit 26 signals, is connected with jtag interface 27 signals.
Synchronous acquisition unit 1 comprises transducer 11, the low-pass filter 12 that is connected with transducer signal, the programmable amplifier 13 that is connected with low-pass filter 12 signals, the active filter 14 that is connected with programmable amplifier 13 signals, with the level displacement circuit 15 that active filter 14 signals are connected, described level displacement circuit 15 is connected with A/D converter 21 signals.
During use, transducer 11 is connected with the three-phase (Divisional A phase end shield, B phase end shield, C phase end shield) of sleeve pipe.The data that measure transfer signals to the second bluetooth module 41 by the first bluetooth module 31 after measuring the sampling unit analysis, judge the sleeve pipe state by PC according to data.Can gather simultaneously the bottom shielding of bushing dielectric loss data of each phase of transformer, carry out better alternate Data Comparison, by the comparison of electric capacity and dielectric loss, judge more accurately which phase fault.
Specifically, Logic control module (CPLD) is by the synchronous pulse per second (PPS) 1PPS of receive clock circuit generation and the control signal of digital signal processing module (DSP), and through certain logical operation generation synchronous sampling signal, the synchronous acquisition unit of control different location, A/D converter begins simultaneously sampling and keeps and analog to digital conversion, thereby has realized the strange land synchronous acquisition of ac electric.In addition, CPLD also is responsible for the read-write sequence control of dual port RAM and produces the work such as A/D converter external clock.
Adopt the GPS chip as synchronous clock, guarantee the synchronous acquisition of data, be conducive to the real-time of terminal PC, monitoring, faster, find more accurately data exception, main transformer is fixed a breakdown timely, for electrical network continues, stable power supply provides safeguard.
The above is the preferred embodiments of the present invention only, is not limited to the present invention.In the above-described embodiments, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. sleeve pipe dielectric loss measurement instrument, it is characterized in that comprising the measurement sampling unit, with measure that the sampling unit signal is connected be provided with the terminal analysis unit, described measurement sampling unit comprises synchronous acquisition unit (1), the signal processing unit (2) that is connected with synchronous acquisition unit (1) signal, the signal output unit (3) that is connected with signal processing unit (2) signal, be provided with the first bluetooth module (31) in the described signal output unit (3), be provided with the second bluetooth module (41) that is connected with the first bluetooth module (31) signal in the described terminal analysis unit (4).
2. sleeve pipe dielectric loss measurement instrument according to claim 1 is characterized in that described measurement sampling unit is arranged in the betal can (5), and described betal can (5) is provided with earth terminal.
3. sleeve pipe dielectric loss measurement instrument according to claim 1 and 2, it is characterized in that described signal processing unit (2) comprises the A/D converter (21) that is connected with synchronous acquisition unit (1) signal, the Logic control module (22) that is connected with the A/D converter signal and digital signal processing module (23), andlogic control module (22) is connected 23 with digital signal processing module) locating module (24) that connects of signal, the clock module (25) and the dual port RAM module (26) that are connected with digital signal processing module (24) signal, described signal output unit (3) comprises the single-chip microcomputer (32) that is connected with dual port RAM module (26) signal, and described bluetooth module (31) is arranged in the single-chip microcomputer (32).
4. sleeve pipe dielectric loss measurement instrument according to claim 3 is characterized in that described locating module (24) is the GRS module.
5. sleeve pipe dielectric loss measurement instrument according to claim 3, it is characterized in that the low-pass filter (12) that described synchronous acquisition unit (1) comprises transducer (11), is connected with transducer signal, the programmable amplifier (13) that is connected with low-pass filter (12) signal, the active filter (14) that is connected with programmable amplifier (13) signal, the level displacement circuit (15) that is connected with active filter (14) signal, described level displacement circuit (15) is connected with A/D converter (21) signal.
6. sleeve pipe dielectric loss measurement instrument according to claim 5 is characterized in that described digital signal processing module (2) also is electrically connected with power module (25), is connected with reset circuit (26) signal, is connected with jtag interface (27) signal.
7. sleeve pipe dielectric loss measurement instrument according to claim 3 is characterized in that described terminal analysis unit (4) is arranged on the terminal PC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103005229A CN103353554A (en) | 2013-07-17 | 2013-07-17 | Casing pipe dielectric loss measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103005229A CN103353554A (en) | 2013-07-17 | 2013-07-17 | Casing pipe dielectric loss measuring instrument |
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| CN103353554A true CN103353554A (en) | 2013-10-16 |
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| CN2013103005229A Pending CN103353554A (en) | 2013-07-17 | 2013-07-17 | Casing pipe dielectric loss measuring instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407230A (en) * | 2014-11-17 | 2015-03-11 | 广州供电局有限公司 | Frequency domain dielectric spectrum measuring device for high voltage bushing |
| CN109613403A (en) * | 2018-11-27 | 2019-04-12 | 国网天津市电力公司 | A kind of transformer oil-tubing and casing assisted detection system |
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| CN101055302A (en) * | 2007-05-30 | 2007-10-17 | 上海龙源智光电力技术有限公司 | GPS clock signal based high voltage capacitive apparatus insulated on-line monitoring system and its implement method |
| CN202770913U (en) * | 2012-09-05 | 2013-03-06 | 西安工程大学 | Transformer sleeve dielectric loss on-line monitoring device |
| CN203310923U (en) * | 2013-07-17 | 2013-11-27 | 国家电网公司 | Bushing dielectric loss measuring instrument |
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2013
- 2013-07-17 CN CN2013103005229A patent/CN103353554A/en active Pending
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| CN101055302A (en) * | 2007-05-30 | 2007-10-17 | 上海龙源智光电力技术有限公司 | GPS clock signal based high voltage capacitive apparatus insulated on-line monitoring system and its implement method |
| CN202770913U (en) * | 2012-09-05 | 2013-03-06 | 西安工程大学 | Transformer sleeve dielectric loss on-line monitoring device |
| CN203310923U (en) * | 2013-07-17 | 2013-11-27 | 国家电网公司 | Bushing dielectric loss measuring instrument |
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| 吴瑞文: "基于工控机和DSP的交流电量同步采集器研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 3, 15 March 2012 (2012-03-15) * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407230A (en) * | 2014-11-17 | 2015-03-11 | 广州供电局有限公司 | Frequency domain dielectric spectrum measuring device for high voltage bushing |
| CN104407230B (en) * | 2014-11-17 | 2016-08-17 | 广州供电局有限公司 | Dielectric spectroscopy measurement apparatus for bushing |
| CN109613403A (en) * | 2018-11-27 | 2019-04-12 | 国网天津市电力公司 | A kind of transformer oil-tubing and casing assisted detection system |
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Application publication date: 20131016 |