CN1295502C - Superconducting state monitoring system of superconducting current limiter - Google Patents
Superconducting state monitoring system of superconducting current limiter Download PDFInfo
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- CN1295502C CN1295502C CNB2004100203731A CN200410020373A CN1295502C CN 1295502 C CN1295502 C CN 1295502C CN B2004100203731 A CNB2004100203731 A CN B2004100203731A CN 200410020373 A CN200410020373 A CN 200410020373A CN 1295502 C CN1295502 C CN 1295502C
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Abstract
The present invention relates to a superconducting state monitoring system of a superconducting current limiter, which monitors whether a superconductor is in a correct operating state or not in a real-time mode and gives timely state prompt so as to ensure the operating stability of an electric power system. The present has the advantages that a hardware device is combined with computer software programme; the hardware device has a simple design, and the software programme is exoteric and easy to understand; an independent parameter preset facility can overcome the disadvantage of unstable critical temperature of the superconductor and can carry out measurement for a plurality of times; curve fitting technology is utilized to predict the variation of a resistance value of the superconductor over the critical temperature; ultrasonic technology is utilized; because an ultrasonic testing method has the advantages of high sensitivity and reliable motion, ahead prediction can be obtained when regional heat accumulation occurs in the superconductor but quench does not happen; high-speed data calculation and data processing capacity of a computer are utilized, which greatly improves the monitoring speed and the monitoring reliability of the superconducting state monitoring system of a superconducting current limiter.
Description
(1) technical field:
The invention belongs to electric system superconductive current limiter superconductor Condition Monitoring Technology field, particularly a kind of restrictor superconductor condition monitoring system that integrates hardware technology and software programming.
(2) background technology:
Power industry is as mainstay of the national economy industry, to become the strong foothold of superconductor technology development, and superconductor technology is in application on power system, also can play to reduce network loss, improve system stability, reduce causality loss, improves effects such as power supply quality.Along with the development of superconductor technology, utilizing the property of superconductor to carry out current limliting becomes one of mainstream technology.Whether the superconductor quench will directly have influence on the effect of current limliting during fault, and therefore, the superconductor status monitoring becomes the focus that this technical field is paid close attention to.The quench detection method of having studied at present mainly contains methods such as temperature rise detection, the detection of turn-to-turn voltage signal, pressure signal detection, flow velocity signal detection, ultrasound examination and bridge circuit detection.These methods cut both ways, and mainly exist sensitivity not high, and heat disturbance to external world, electromagnetic noise class are disturbed poor anti jamming capability, the shortcoming that real-time is bad.Therefore, the quench monitoring method is still an important research content with superconducting power apparatus practicability fast and effectively.
(3) summary of the invention:
The object of the present invention is to provide a kind of superconductive current limiter superconductor condition monitoring system, it fast and accurately monitoring method in conjunction with the property of superconductor, can overcome the shortcoming of existing monitoring method, and obtain high-precision monitoring effect, improve the stability and the reliability of superconductive current limiter current limliting widely, improved power supply quality.
Technical scheme of the present invention: a kind of superconductive current limiter superconductor condition monitoring system, comprise preset parameter and ultrasound wave predicted portions, it is characterized in that this system also is provided with the hardware device of signals collecting, central processing unit data management module, warning system and superconductor and the computer software of control total system constitutes, said preset parameter part is connected each terminal of superconductor respectively with the input end of part of data acquisition, its output terminal connects the central processing unit data management module, and central processing unit data management module output terminal connects the input end of warning system; The output terminal of said ultrasound wave predicted portions connects the input end of warning system and the input end of superconductor respectively, and the input end of ultrasound wave predicted portions connects the output terminal of superconductor.
Above-mentioned said preset parameter portion of external hardware device comprises: constant current source, thermocouple low-reading thermometer, direct current amplifier, high-precision a/d converter, central processing unit and thermostat; Said constant current source is connected in the external terminal of superconductor, the output voltage signal of superconductor amplifies through direct current amplifier, carries out analog to digital conversion through high-precision a/d converter again, enters central processing unit afterwards and handles; Said thermocouple low-reading thermometer collecting temperature signal amplifies through direct current amplifier, carries out analog to digital conversion through high-precision a/d converter again, also enters central processing unit afterwards and handles.
Above-mentioned said part of data acquisition external hardware device comprises: signal acquiring board, temperature sensor and high-precision a/d converter; The input end of said signal acquiring board connects loop, superconductor place, and line current that signal acquiring board collects in real time and voltage signal carry out analog to digital conversion through high-precision a/d converter, enters central processing unit afterwards and handles; The temperature signal that temperature sensor collects also enters central processing unit and handles after analog to digital conversion.
Above-mentioned said ultrasound wave predicted portions external hardware device comprises: ultrasonic signal generating means and ultrasonic signal receiving trap; Said ultrasonic signal generating means is installed in superconductor heat eliminating medium input end, the ultrasonic signal receiving trap is connected the heat eliminating medium output terminal, the ultrasonic signal generating means sends the switching value signal, and the signal receiving device of sending into external warning system produces light warning.
Above-mentioned said warning system comprises the signal lamp of signal receiving device, different colours; The switching value signal that said signal receiving device reception external ultrasonic predicted portions and central processing unit send, the switching of control signal pilot lamp and color thus.
The computer software of above-mentioned said control total system compares two parts by data processing and data and forms; Said data processing section is that outside preset parameter signal and acquired signal are made conventional respective handling, and sets up database and carry out the routine storage; Said data comparator is that electric signal that collects in real time and temperature signal are compared with the parameter value that presets, judge according to comparative result whether superconductor is operated in reliable and stable state, and send the switching value signal to warning system, with the folding of control respective switch, thus the switching of control pilot lamp; Data comparator is made up of temperature comparison module, resistance comparison module and superconductor duty judge module; The signal input part of said temperature comparison module is connected in the external data processing section, its output terminal divides two-way to connect the resistance comparison module, each branch from resistive module come out the back each minute two-way enter superconductor duty judge module, two branches constitute by four the road.
Principle of work of the present invention:
The principle of work of the superconductive current limiter superconductor monitoring system that this case is related is: the preset parameter part is actual to be the Critical Temperature of Superconductor determinator, realize real-time collection and processing to resistance signal and temperature signal the temperature of gained and the resistance under this temperature being recorded in the corresponding database by external hardware device and computer software programming; Principle according to curve fitting can draw resistance-temperature curve, further can get curve and extend trend, and resistance in the supplementary data storehouse and thermograph, if the critical temperature that records is different with former record next time, then refresh raw readings, write down current new value; The ultrasound wave predicted portions is then sent signal by the ultrasonic signal generating means, by behind the heat eliminating medium by ultrasonic signal receiving trap received signal, if transport function changes between superconductor heat eliminating medium input end and the output terminal, then proof will have the quench phenomenon to take place, central processing unit will send 1 one switching value signals of switch to warning system, allow green indicating lamp 1 light; Meanwhile, the temperature signal of electric current, voltage and the temperature sensor collection that collects by signal acquiring board is sent to data processing unit and data comparing unit successively, compare with the relevant parameter that presets, when superconductor is operated in correct duty, central processing unit is according to judging angle to warning system switch 2 or 3 one switching value signals, and green indicating lamp 2 or 3 is bright; When superconductor failed to be operated in correct duty, central processing unit can be according to judging that angle to warning system switch 4 or 5 one switching value signals, makes red alarm pilot lamp 2 or 3 bright.
Superiority of the present invention and technique effect are: 1. hardware unit combines with computer software programming, the hardware unit simplicity of design, and software programming is easy-to-understand; 2. the independent parameter preset device is arranged, can overcome the unsettled shortcoming of Critical Temperature of Superconductor, can take multiple measurements; 3. use the above superconductor resistance change of curve fitting technique predicted critical temperature; 4. ultrasonic technology is applied to this,, can the amount of localized heat accumulation occur and make prediction in advance when as yet quench not taking place at superconductor because ultrasonic Detection Method has advantage highly sensitive, reliable in action; 5. utilize computing machine data computation and data-handling capacity at a high speed, improved this monitoring system monitoring velocity and monitoring reliability greatly; 6. from reducing network loss to the full extent, improve system stability, reducing causality loss.
(4) description of drawings:
Accompanying drawing 1 is the general structure synoptic diagram among the present invention's related " superconductive current limiter superconductor condition monitoring system ".
Accompanying drawing 2 is the preset parameter part-structure synoptic diagram among the present invention's related " superconductive current limiter superconductor condition monitoring system ".
Accompanying drawing 3 is part of data acquisition and warning system structural representation (Fig. 3-a is the part of data acquisition structural representation, and Fig. 3-b is the warning system structural representation) among the present invention's related " superconductive current limiter superconductor condition monitoring system ".
Accompanying drawing 4 is the computer software process flow diagram of the control total system among the present invention's related " superconductive current limiter superconductor condition monitoring system ".
(5) embodiment:
Embodiment: a kind of superconductive current limiter superconductor condition monitoring system (see figure 1), comprise preset parameter and ultrasound wave predicted portions, it is characterized in that this system also is provided with the hardware device of signals collecting, central processing unit data management module, warning system and superconductor and the computer software of control total system constitutes, said preset parameter part is connected each terminal of superconductor respectively with the input end of part of data acquisition, its output terminal connects the central processing unit data management module, and central processing unit data management module output terminal connects the input end of warning system; The output terminal of said ultrasound wave predicted portions connects the input end of warning system and the input end of superconductor respectively, and the input end of ultrasound wave predicted portions connects the output terminal of superconductor.
Above-mentioned said preset parameter part (see figure 2) external hardware device comprises: constant current source, thermocouple low-reading thermometer, direct current amplifier, high-precision a/d converter, central processing unit and thermostat; Said constant current source is connected in the external terminal of superconductor, the output voltage signal of superconductor amplifies through direct current amplifier, carries out analog to digital conversion through high-precision a/d converter again, enters central processing unit afterwards and handles; Said thermopair low-reading thermometer collecting temperature signal amplifies through direct current amplifier, carries out analog to digital conversion through high-precision a/d converter again, also enters central processing unit afterwards and handles.
Above-mentioned said part of data acquisition (sees that Fig. 3-a) external hardware device comprises: signal acquiring board, temperature sensor and high-precision a/d converter; The input end of said signal acquiring board connects loop, superconductor place, and signal acquiring board gathers line current in real time and voltage signal carries out analog to digital conversion through high-precision a/d converter, enters central processing unit afterwards and handles; The temperature signal that said temperature sensor collects also will enter central processing unit and handle after analog to digital conversion.
Above-mentioned said ultrasound wave predicted portions (see figure 1) external hardware device comprises: ultrasonic signal generating means and ultrasonic signal receiving trap; Said ultrasonic signal generating means is installed in the input end of superconductor heat eliminating medium, the ultrasonic signal receiving device is connected the output terminal of heat eliminating medium, the ultrasonic signal generating means sends a switching value signal, and the signal receiving device of sending into the external alert system produces light warning.
Above-mentioned said warning system (sees that Fig. 3-b) comprises the signal lamp of signal receiving device, different colours; The switching value signal that said signal receiving device reception external ultrasonic predicted portions and central processing unit send, the switching of control signal pilot lamp and color thus.
The computer software (see figure 4) of above-mentioned said control total system compares two parts by data processing and data and forms; Said data processing section is that outside preset parameter signal and acquired signal are made conventional respective handling, and sets up database and carry out the routine storage; Said data comparator is that electric signal that collects in real time and temperature signal are compared with the parameter value that presets, judge according to comparative result whether superconductor is operated in reliable and stable state, and send the switching value signal to warning system, with the folding of control respective switch, thus the switching of control pilot lamp; Data comparator is made up of temperature comparison module, resistance comparison module and superconductor duty judge module; The signal input part of said temperature comparison module is connected in the external data processing section, its output terminal divides two-way to connect the resistance comparison module, each branch from resistive module come out the back each minute two-way enter superconductor duty judge module, two branches constitute by four the road.
Claims (6)
1, a kind of superconductive current limiter superconductor condition monitoring system, comprise preset parameter and ultrasound wave predicted portions, it is characterized in that this system also is provided with the hardware device of signals collecting, central processing unit data management module, warning system and superconductor and the computer software of control total system constitutes, said preset parameter part is connected each terminal of superconductor respectively with the input end of part of data acquisition, its output terminal connects the central processing unit data management module, and central processing unit data management module output terminal connects the input end of warning system; The output terminal of said ultrasound wave predicted portions connects the input end of warning system and the input end of superconductor respectively, and the input end of ultrasound wave predicted portions connects the output terminal of superconductor.
2,, it is characterized in that said preset parameter portion of external hardware device comprises: constant current source, thermocouple low-reading thermometer, direct current amplifier, high-precision a/d converter, central processing unit and thermostat according to the said a kind of superconductive current limiter superconductor condition monitoring system of claim 1; Said constant current source is connected in the external terminal of superconductor, the output voltage signal of superconductor amplifies through direct current amplifier, carries out analog to digital conversion through high-precision a/d converter again, enters central processing unit afterwards and handles; Said thermopair low-reading thermometer collecting temperature signal amplifies through direct current amplifier, carries out analog to digital conversion through high-precision a/d converter again, also enters central processing unit afterwards and handles.
3, according to the said a kind of superconductive current limiter superconductor condition monitoring system of claim 1, it is characterized in that said part of data acquisition external hardware device comprises: signal acquiring board, temperature sensor and high-precision a/d converter; The input end of said signal acquiring board connects loop, superconductor place, and signal acquiring board gathers line current in real time and voltage signal carries out analog to digital conversion through high-precision a/d converter, enters central processing unit afterwards and handles; The temperature signal that said temperature sensor collects also will enter central processing unit and handle after analog to digital conversion.
4,, it is characterized in that said ultrasound wave predicted portions external hardware device comprises: ultrasonic signal generating means and ultrasonic signal receiving trap according to the said a kind of superconductive current limiter superconductor condition monitoring system of claim 1; Said ultrasonic signal generating means is installed in superconductor heat eliminating medium input end, the ultrasonic signal receiving device is connected the heat eliminating medium output terminal, the ultrasonic signal generating means sends the switching value signal, sends into the warning system signal receiving device and produces light warning.
5, according to the said a kind of superconductive current limiter superconductor condition monitoring system of claim 1, it is characterized in that said warning system comprises the signal lamp of signal receiving device, different colours; The switching value signal that said signal receiving device reception external ultrasonic predicted portions and central processing unit send, the switching of control signal pilot lamp and color thus.
6,, it is characterized in that the computer software of said control total system is made up of data processing and two parts of data comparison according to the said a kind of superconductive current limiter superconductor condition monitoring system of claim 1; Said data processing section is that outside preset parameter signal and acquired signal are made conventional respective handling, and sets up database and carry out the routine storage; Said data comparator is that electric signal that collects in real time and temperature signal are compared with the parameter value that presets, judge according to comparative result whether superconductor is operated in reliable and stable state, and send the switching value signal to warning system, with the folding of control respective switch, thus the switching of control pilot lamp; Data comparator is made up of temperature comparison module, resistance comparison module and superconductor duty judge module; The signal input part of said temperature comparison module is connected in the external data processing section, its output terminal divides two-way to connect the resistance comparison module, each branch from resistive module come out the back each minute two-way enter superconductor duty judge module, two branches constitute by four the road.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100203731A CN1295502C (en) | 2004-08-25 | 2004-08-25 | Superconducting state monitoring system of superconducting current limiter |
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| CNB2004100203731A CN1295502C (en) | 2004-08-25 | 2004-08-25 | Superconducting state monitoring system of superconducting current limiter |
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| CN1295502C true CN1295502C (en) | 2007-01-17 |
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| CN102707174B (en) * | 2012-06-11 | 2015-01-07 | 南京亚派科技实业有限公司 | Detection system and method of operation state of resistor type superconductive current limiter |
| CN109917310A (en) * | 2019-01-29 | 2019-06-21 | 兰州大学 | Signal high speed synchronous sample and Protection control system are quenched in a kind of superconducting experiment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07174742A (en) * | 1993-12-20 | 1995-07-14 | Fujitsu Ltd | Method for measuring crystal defect |
| JPH08115812A (en) * | 1994-10-17 | 1996-05-07 | Hitachi Ltd | Abnormality detection apparatus of superconducting magnet |
| US5731521A (en) * | 1995-10-13 | 1998-03-24 | The United States Of America As Represented By The Department Of Energy | Apparatus for monitoring high temperature ultrasonic characterization |
| CN2747586Y (en) * | 2004-08-25 | 2005-12-21 | 天津理工大学 | Super conductor monitor for superconductive current limiter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07174742A (en) * | 1993-12-20 | 1995-07-14 | Fujitsu Ltd | Method for measuring crystal defect |
| JPH08115812A (en) * | 1994-10-17 | 1996-05-07 | Hitachi Ltd | Abnormality detection apparatus of superconducting magnet |
| US5731521A (en) * | 1995-10-13 | 1998-03-24 | The United States Of America As Represented By The Department Of Energy | Apparatus for monitoring high temperature ultrasonic characterization |
| CN2747586Y (en) * | 2004-08-25 | 2005-12-21 | 天津理工大学 | Super conductor monitor for superconductive current limiter |
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