CN103398794B - Large power generating equipment end parameter online system - Google Patents
Large power generating equipment end parameter online system Download PDFInfo
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- CN103398794B CN103398794B CN201310320776.7A CN201310320776A CN103398794B CN 103398794 B CN103398794 B CN 103398794B CN 201310320776 A CN201310320776 A CN 201310320776A CN 103398794 B CN103398794 B CN 103398794B
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Abstract
The present invention discloses a kind of large power generating equipment end parameter online system, motor end core is measured at a series of Pt100 temperature sensor of motor end mounting arrangements and magentic test coil, the temperature of the limit iron leg heart and compressing structure part key position and magnetic induction density, measuring-signal carries out signal condition via the preposition conditioning Acquisition Instrument of signal and gathers being transformed to digital signal, upper monitoring computer is sent to again by RS-485 industrial field bus, upper monitoring computer utilizes monitoring of software to process measurement data, computational analysis is carried out by expert system software, and compare with the setting value in expert system software, make working properly, early warning, dangerous various prompting, ensure the safe operation of genset.
Description
Technical field
The present invention relates to the on-line monitoring system of a kind of large power generating equipment end parameter.
Background technology
At present along with the continuous increase of high-rating generator place capacity, the end magnetic field of huge generator is distributed rationally, reduces the wastage and raise the efficiency, prevent local overheating from becoming focal issue.The concern carrying out this that the research of high-rating generator end magnetic field distribution is subject to industry is always studied widely.People adopt the end electromagnetic field of the method for theory calculate to turbodynamo to analyze and study usually, sometimes also measure the parameter of large power generating equipment end by the method for test, the result calculated with this proof theory.
Usual large-sized turbine generator stator core end to be fixed iron core by end construction part and to compress, prevent motor from operational process, occurring iron core looseness and cause the overheated and excessive potential safety hazard caused to motor of vibration unshakable in one's determination, in addition, Stator End Winding magnetic field also can in end construction part inductive loop and cause heating.Therefore whether the temperature of on-line monitoring high-rating generator end key position, magnetic induction density parameter be normal, is the effective means ensureing unit safety operation.
Summary of the invention
Fundamental purpose of the present invention is open a kind of large power generating equipment end parameter online system, involved technology is mainly turbo-generator end parameter online, by large power generating equipment end parameter online systematic difference, reach the object that on-line monitoring End of Turbogenerator parameter ensures unit safety operation.The present invention is achieved through the following technical solutions: a kind of large power generating equipment end parameter online system, and this system is arranged on the surperficial Pt100 temperature sensor P needing to monitor position of motor end core, the limit iron leg heart and compressing structure part by several
1, P
2..., P
mbe arranged on the magentic test coil C of motor end same area
1, C
2..., C
mterminal board (1) on motor stator base, the preposition conditioning sampling instrument (2) of signal, host computer (3) is formed, the major part that the preposition conditioning Acquisition Instrument (2) of signal is on-line monitoring system, its CPU (central processing unit) adopts the C8051F020 single-chip microcomputer of Cygnal company; The output signal of its signal conditioning circuit to magentic test coil and Pt100 is carried out amplifying conditioning and is become the standard sample voltage signal can changed by A/D circuit; The multicircuit switch circuit be made up of MAX333 chip is switched to a road output channel respectively multichannel input signal; The A/D change-over circuit be made up of 24 high-precision A/D conversion chip AD7711A of ANALOG DEVICE company of the U.S., realizes simulating signal and changes to the high precision of digital signal; Under central processing unit controls, be converted to digital quantity temperature signal and magnetic induction density signal are sent to upper monitoring computer (3) by RS-485 industrial field bus, host computer (3) utilizes monitoring of software to process measurement data, the preposition conditioning sampling instrument (2) of described signal, wherein: U
11, U
12..., U
1mfor magentic test coil signal conditioning circuit, strict Linear Amplifer is carried out to the output weak signal of magentic test coil, become and can be carried out by A/D circuit the standard AC sampled voltage signal changed; U
21, U
22..., U
2mfor Pt100 temperature sensor signal modulate circuit, the output resistance of Pt100 becomes can be carried out by A/D circuit the standard direct current sampled voltage signal changed through full-bridge circuit process by it; U
3for the multicircuit switch circuit be made up of MAX333 chip, multichannel input signal can be switched to a road output channel respectively; U
4for the A/D change-over circuit be made up of 24 high-precision A/D conversion chip AD7711A of ANALOG DEVICE company of the U.S., realize simulating signal and change to the high precision of digital signal; U
5for central processing unit CPU, it is the control core of the preposition conditioning Acquisition Instrument of signal; U
6for the RS-485 bus module of communication signal level conversion, the output signal access magentic test coil signal conditioning circuit U of magentic test coil C1
11, magentic test coil C
2output signal access magentic test coil signal conditioning circuit U
12..., magnetic coil C
moutput signal access magentic test coil signal conditioning circuit U
1m, after signal condition, become the standard AC sampled voltage signal between-5V to+5V; Temperature sensor P
1receive temperature sensor signal modulate circuit U
21, temperature sensor P
2receive temperature sensor signal modulate circuit U
22..., temperature sensor P
mreceive temperature sensor signal modulate circuit U
2m, the resistance signal of temperature sensor becomes the standard direct current sampled voltage signal between 0 to+5V after signal condition; Multichannel standard analog signal after these conditionings is by multicircuit switch U
3at CPU (central processing unit) U
5accurate A/D change-over circuit U is transferred under control
4be transformed to digital signal, then by CPU (central processing unit) U
5upper monitoring computer is sent to by RS-485 industrial field bus.
Host computer utilizes monitoring of software to process measurement data, carries out computational analysis by expert system software, and compares with the setting value in expert system, makes the various promptings such as machine operation is normal, early warning, danger.
The preposition conditioning Acquisition Instrument of key instrument signal due to on-line monitoring system adopts 24 high-precision A/D conversion chip AD7711A of high-precision signal modulate circuit and ANALOG DEVICE company of the U.S., so the measurement range with temperature and magnetic induction density is large, precision is high, the fast feature of sample rate.Temperature measurement range is 0 DEG C-400 DEG C, error is not more than ± and 1 DEG C; Magnetic flux density measurement scope is 0.01 tesla-2.5 tesla, and relative error is not more than 0.5%; Sample rate can up to 1000 sampled points per second, and this makes this system may be used for the generator end temperature of various capacity and the on-line monitoring of magnetic induction density parameter.
Accompanying drawing explanation
Fig. 1 is that the system application of invention connects block diagram
Fig. 2 is that sensor is at motor end circumferencial direction mounting arrangements schematic diagram
Fig. 3 is that sensor is at installation site, 0 ° of direction, motor end arrangenent diagram
Fig. 4 is that sensor is at installation site, 90 ° of directions, motor end arrangenent diagram
Fig. 5 is signal preposition conditioning Acquisition Instrument theory diagram
Embodiment
The parameter online system application of large power generating equipment end connects block diagram as shown in Figure 1, comprising: the Pt100 temperature sensor P being arranged on the positions such as the iron core of motor end needs monitoring, the limit iron leg heart and compressing structure part surface
1, P
2..., P
m; Be arranged on the magentic test coil C of motor end same area
1, C
2..., C
m; Terminal board 1 on motor stator base; The preposition conditioning sampling instrument 2 of signal; Host computer 3.Pt100 temperature sensor in on-line monitoring system and magentic test coil need monitoring installation site figure as shown in Figure 2 at motor end circumferencial direction, wherein in motor end, 0 ° of direction needs monitoring installation site figure as shown in Figure 3, in motor end, 90 ° of directions need monitoring installation site figure as shown in Figure 4, in figure: P
1-P
10represent the Pt100 temperature sensor be arranged on herein, C
1-C
10represent the magentic test coil be arranged on herein, 6 represent the generator core center needing monitoring, 7 represent the limit iron leg heart needing monitoring, 8 represent generator unit stator air channel, 9 represent the generator unit stator end finger needing monitoring, 10 represent the pressing ring of stator of power generator needing monitoring, and 11 represent generator unit stator magnetic shielding.Be arranged on the temperature sensor P of motor stator inner end
1-P
10with magentic test coil C
1-C
10signal cable guide to outside motor respectively by the terminal board 1 be arranged on motor stator base, be connected to the connection terminal of the preposition conditioning Acquisition Instrument 2 of signal.The preposition conditioning Acquisition Instrument 2 of signal is major parts of on-line monitoring system, and its CPU (central processing unit) adopts the C8051F020 single-chip microcomputer of Cygnal company, signal preposition conditioning Acquisition Instrument 2 theory diagram as shown in Figure 5, wherein: U
11, U
12..., U
1mfor magentic test coil signal conditioning circuit, strict Linear Amplifer is carried out to the output weak signal of magentic test coil, become and can be carried out by A/D circuit the standard AC sampled voltage signal changed; U
21, U
22..., U
2mfor Pt100 temperature sensor signal modulate circuit, the output resistance of Pt100 becomes can be carried out by A/D circuit the standard direct current sampled voltage signal changed through full-bridge circuit process by it; U
3for the multicircuit switch circuit be made up of MAX333 chip, multichannel input signal can be switched to a road output channel respectively; U
4for the A/D change-over circuit be made up of 24 high-precision A/D conversion chip AD7711A of ANALOG DEVICE company of the U.S., realize simulating signal and change to the high precision of digital signal; U
5for central processing unit CPU, it is the control core of the preposition conditioning Acquisition Instrument of signal; U
6for the RS-485 bus module of communication signal level conversion.Magentic test coil C
1output signal access magentic test coil signal conditioning circuit U
11, magentic test coil C
2output signal access magentic test coil signal conditioning circuit U
12..., magnetic coil C
moutput signal access magentic test coil signal conditioning circuit U
1m, after signal condition, become the standard AC sampled voltage signal between-5V to+5V; Temperature sensor P
1receive temperature sensor signal modulate circuit U
21, temperature sensor P
2receive temperature sensor signal modulate circuit U
22..., temperature sensor P
mreceive temperature sensor signal modulate circuit U
2m, the resistance signal of temperature sensor becomes the standard direct current sampled voltage signal between 0 to+5V after signal condition; Multichannel standard analog signal after these conditionings is by multicircuit switch U
3at CPU (central processing unit) U
5accurate A/D change-over circuit U is transferred under control
4be transformed to digital signal, then by CPU (central processing unit) U
5upper monitoring computer 3 is sent to by RS-485 industrial field bus.Host computer 3 utilizes monitoring of software to process measurement data, computational analysis is carried out by expert system software, and compare with the setting value in expert system, make that machine operation is normal, early warning, dangerous various prompting, ensure the safe operation of genset.
Claims (1)
1. a large power generating equipment end parameter online system, is characterized in that: this system is arranged on the surperficial Pt100 temperature sensor P needing to monitor position of motor end core, the limit iron leg heart and compressing structure part by several
1, P
2..., P
m, be arranged on the magentic test coil C at temperature sensor position, motor end
1, C
2..., C
mterminal board (1) on motor stator base, the preposition conditioning sampling instrument (2) of signal, host computer (3) is formed, the major part that the preposition conditioning Acquisition Instrument (2) of signal is on-line monitoring system, its CPU (central processing unit) adopts the C8051F020 single-chip microcomputer of Cygnal company; The output signal of its signal conditioning circuit to magentic test coil and Pt100 is carried out amplifying conditioning and is become the standard sample voltage signal can changed by A/D circuit; The multicircuit switch circuit be made up of MAX333 chip is switched to a road output channel respectively multichannel input signal; The A/D change-over circuit be made up of 24 high-precision A/D conversion chip AD7711A of ANALOG DEVICE company of the U.S., realizes simulating signal and changes to the high precision of digital signal; Under central processing unit controls, be converted to digital quantity temperature signal and magnetic induction density signal are sent to upper monitoring computer (3) by RS-485 industrial field bus, host computer (3) utilizes monitoring of software to process measurement data, the preposition conditioning sampling instrument (2) of described signal, wherein: U
11, U
12..., U
1mfor magentic test coil signal conditioning circuit, strict Linear Amplifer is carried out to the output weak signal of magentic test coil, become and can be carried out by A/D circuit the standard AC sampled voltage signal changed; U
21, U
22..., U
2mfor Pt100 temperature sensor signal modulate circuit, the output resistance of Pt100 becomes can be carried out by A/D circuit the standard direct current sampled voltage signal changed through full-bridge circuit process by it; U
3for the multicircuit switch circuit be made up of MAX333 chip, multichannel input signal is switched to a road output channel respectively; U
4for the A/D change-over circuit be made up of 24 high-precision A/D conversion chip AD7711A of ANALOG DEVICE company of the U.S., realize simulating signal and change to the high precision of digital signal; U
5for central processing unit CPU, it is the control core of the preposition conditioning Acquisition Instrument of signal; U
6for the RS-485 bus module of communication signal level conversion, magentic test coil C
1output signal access magentic test coil signal conditioning circuit U
11, magentic test coil C
2output signal access magentic test coil signal conditioning circuit U
12..., magentic test coil C
moutput signal access magentic test coil signal conditioning circuit U
1m, after signal condition, become the standard AC sampled voltage signal between-5V to+5V; Temperature sensor P
1receive temperature sensor signal modulate circuit U
21, temperature sensor P
2receive temperature sensor signal modulate circuit U
22..., temperature sensor P
mreceive temperature sensor signal modulate circuit U
2m, the resistance signal of temperature sensor becomes the standard direct current sampled voltage signal between 0 to+5V after signal condition; Multichannel standard analog signal after these conditionings is by multicircuit switch U
3at CPU (central processing unit) U
5accurate A/D change-over circuit U is transferred under control
4be transformed to digital signal, then by CPU (central processing unit) U
5upper monitoring computer is sent to by RS-485 industrial field bus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310320776.7A CN103398794B (en) | 2013-07-29 | 2013-07-29 | Large power generating equipment end parameter online system |
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|---|---|---|---|
| CN201310320776.7A CN103398794B (en) | 2013-07-29 | 2013-07-29 | Large power generating equipment end parameter online system |
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| CN103398794A CN103398794A (en) | 2013-11-20 |
| CN103398794B true CN103398794B (en) | 2015-08-19 |
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| CN110530546B (en) * | 2019-08-16 | 2021-12-24 | 中国航空工业集团公司西安飞行自动控制研究所 | Temperature sampling circuit |
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| CN101813756A (en) * | 2010-04-23 | 2010-08-25 | 华北电力大学 | Method for manufacturing transient high-frequency magnetic field of power system |
| KR20130070590A (en) * | 2010-05-04 | 2013-06-27 | 레미 테크놀러지스 엘엘씨 | Electric machine component temperature monitoring |
| CN202305048U (en) * | 2011-10-31 | 2012-07-04 | 莱芜科泰电力科技有限公司 | On-line monitoring device for high voltage cable |
| CN202734974U (en) * | 2012-06-20 | 2013-02-13 | 江苏常牵庞巴迪牵引系统有限公司 | Temperature on-line monitoring device for motor rotor |
| CN202956217U (en) * | 2012-12-06 | 2013-05-29 | 西安工程大学 | Primary equipment temperature on-line monitoring system for concentrative intelligent substation |
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