CN104596657A - Gas compressor inlet/outlet temperature monitoring device and method - Google Patents
Gas compressor inlet/outlet temperature monitoring device and method Download PDFInfo
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Abstract
The invention relates to the technical field of temperature measurement of a gas compressor and provides a gas compressor inlet/outlet temperature monitoring device and method. According to the gas compressor inlet/outlet temperature monitoring device, temprature values of a plurality of points are obtained by more than four temprature measuring sensors, and a maximum temperature value, a minimum temperature value and an average value of all the temperature values are used as output temperatures so that inlet and outlet temperatures of a gas compressor are more accurate. Furthermore, the maximum temperature value, the minimum temperature value and the output average temperature are compared so that the more reliable gas compressor inlet/outlet temperature fault monitoring is realized. When the detection device is used for monitoring the gas compressor inlet/outlet temperature of a heavy duty gas turbine, the control performance of the whole heavy duty gas turbine is more accurate.
Description
Technical field
The present invention relates to the thermometric technical field of pneumatic plant, particularly relate to a kind of pneumatic plant out temperature monitoring device and method, more specifically for being applicable to a kind of pneumatic plant out temperature monitoring device and the method for heavy duty gas turbine.
Background technology
Pneumatic plant is the vitals of heavy duty gas turbine, and compressor inlet temperature, outlet temperature, as the cross section parameter of pneumatic plant, are all very important to the control of the even whole combustion engine of the performance of pneumatic plant.Such as, the rotating speed under utilizing the inlet temperature of pneumatic plant reality actual speed to be modified to mark condition, also can revise the fuel quantity etc. entering firing chamber, utilize the angle etc. of the outlet temperature correction compressor air inlet machine adjustable vane of pneumatic plant.So be very important to the accurate process of the measuring-signal of compressor inlet temperature, outlet temperature.
The monitoring method of general compressor inlet temperature and outlet temperature has two kinds: the first is employing two thermometric thermal resistances or thermocouple sensor, get its large value as measuring tempeature, corresponding sensor fault monitoring method is that two measurement value sensors differ by more than certain value and then think and occur measuring fault; The second is employing three thermometric thermal resistances or thermocouple sensor, gets its intermediate value as measuring tempeature, and corresponding sensor fault monitoring method is more than a threshold value, the difference of the maxima and minima measured then thinks that fault is measured in appearance.
Above-mentioned two kinds of methods measuring compressor inlet temperature and outlet temperature are not enough accurate.
Further, in first method, two sensors obtain two measuring points, if the sensor recording higher value breaks down just, then cause measuring-signal inaccurate.Get three measuring points by three sensors in second method, the measurement structure of relative first method is comparatively accurate, but the measured value finally exported is not taken into account by the measurement malfunction monitoring scheme of correspondence, thus reduces the validity of malfunction monitoring.
In view of this, urgently provide a kind of and measure pneumatic plant out temperature monitoring device and method more accurately.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is just to provide a kind of pneumatic plant out temperature monitoring device and method, obtains measurement result accurately.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of pneumatic plant out temperature monitoring device, comprising more than four temperature probes; The output terminal of all described temperature probes all selects the input end of module to be connected with maximum selection rule module, summation module and minimum value; Described maximum selection rule module, summation module and minimum value select the output terminal of module to be all connected the input end of end value eliminating module; Described end value gets rid of the input end of the output terminal connection average module of module; Maximum temperature values and average temperature value input first are done differential mode block by described maximum selection rule module and average module respectively; Described first output terminal doing differential mode block connects the input end of the first temperature dispersion degree upper limit judge module; Described minimum value selects module and average module respectively minimum temperature value and average temperature value input second to be done differential mode block; Described second output terminal doing differential mode block connects the input end of the second temperature dispersion degree upper limit judge module; The output terminal connection of first and second temperature dispersion degree upper limit judge module described or the input end of door; The output terminal asynthesis pilot lamp of described or door.
The present invention also provides a kind of pneumatic plant out temperature monitoring device, comprises more than four temperature probes; The output terminal of all described temperature probes all selects the input end of module to be connected with maximum selection rule module, summation module and minimum value; Maximum temperature values is sent to the first display module by described maximum selection rule module; Described minimum value selects module that minimum temperature value is sent to the second display module; Described maximum selection rule module, summation module and minimum value select the output terminal of module to be all connected the input end of end value eliminating module; Described end value gets rid of the input end of the output terminal connection average module of module, and the output terminal of described average module connects the 3rd display module.
Preferably, the quantity of described temperature probe is four.
The present invention also provides a kind of pneumatic plant out temperature monitoring method, comprises the following steps:
S1: arrange N number of temperature probe in the import of pneumatic plant or exit position, measure the temperature signal of N number of point, and sent to by all described temperature signals maximum selection rule module, summation module and minimum value to select module, wherein N >=4;
S2: described maximum selection rule module tries to achieve maximum temperature values by calculating, and maximum temperature values is sent to the first display module; Described summation module by calculate try to achieve all temperature values and; Described minimum value selects module to try to achieve minimum temperature value by calculating, and minimum temperature value is sent to the second display module;
S3: described maximum selection rule module, summation module and minimum value select module respectively by maximum temperature values, all temperature values and, minimum temperature value sends to end value to get rid of module, described end value get rid of module calculate all temperature values after removing maximum temperature values and minimum temperature value and;
S4: by all temperature values finally obtained in S3 and send to average module, described average module tries to achieve average temperature value, and this average temperature value is sent to the 3rd display module; In described average module, the acquisition methods of average temperature value is: by all temperature values of finally obtaining in S3 and divided by (N-2), obtain average temperature value.
Preferably, after described S4, also S5 is comprised: the maximum temperature values obtained in described S2 and minimum temperature value contrasted with the average temperature value that obtains in S4 respectively; If the difference between maximum temperature values and average temperature value, and the difference between minimum temperature value and average temperature value has at least one to be greater than temperature dispersion degree higher limit, then judge that described pneumatic plant out temperature monitoring device occurs measuring fault.
(3) beneficial effect
Technical scheme of the present invention has the following advantages: pneumatic plant out temperature monitoring device of the present invention, the temperature value of multiple point is obtained by more than four temperature probes, and get the mean value of all temperature values beyond maximum temperature values, minimum temperature value as output temperature, thus the import and export temperature of the pneumatic plant obtained is more accurate.
On this basis, the average temperature value of maximum temperature values, minimum temperature value and output is contrasted, thus obtain pneumatic plant out temperature malfunction monitoring more reliably.When this pick-up unit being used for the monitoring of heavy duty gas turbine pneumatic plant out temperature, the control performance of whole heavy duty gas turbine can be made more accurate.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the principle schematic of pneumatic plant out temperature monitoring device of the present invention;
Fig. 2 judges whether pneumatic plant out temperature monitoring device of the present invention occurs measuring the principle schematic of fault;
In figure: 1, temperature probe; 2, maximum selection rule module; 3, summation module; 4, minimum value selects module; 5, the first display module; 6, the second display module; 7, end value gets rid of module; 8, average module; 9, the 3rd display module; 10, first differential mode block is done; 11, second differential mode block is done; 12, the first temperature dispersion degree upper limit judge module; 13, the second temperature dispersion degree upper limit judge module; 14 or door.
Embodiment
Below in conjunction with drawings and Examples, embodiments of the present invention are described in further detail.Following examples for illustration of the present invention, but can not be used for limiting the scope of the invention.
In describing the invention, it should be noted that, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.
The pneumatic plant out temperature monitoring device of the present embodiment, be applicable to the situation that four and above sensor for measuring temperature carry out thermometric, the situation being only herein four with the quantity of temperature probe 1 is described; Should be understood that, in the pneumatic plant out temperature monitoring device of the present embodiment, the quantity of temperature probe 1 can also be five, six ...In addition, the pneumatic plant out temperature monitoring method of the present embodiment, due to the inlet temperature monitoring method of pneumatic plant and the outlet temperature monitoring method of pneumatic plant consistent, unique difference is the setting value of the temperature dispersion degree upper limit.Therefore, with the representational explanation of the monitoring method of compressor inlet temperature implementation of the present invention.
Embodiment one
The pneumatic plant out temperature monitoring device of the present embodiment one, comprises four temperature probes 1, maximum selection rule module 2, summation module 3, minimum value selection module 4 and average module 8, specifically refers to Fig. 1.Temperature signal sends to maximum selection rule module 2, summation module 3 and minimum value to select module 4 by these four temperature probes 1; Wherein, maximum selection rule module 2 calculates and tries to achieve maximum temperature values T
mAX, and by maximum temperature values T
mAXsend to the first display module 5; Summation module 3 by calculate try to achieve all temperature values and; Minimum value selects module 4 to try to achieve minimum temperature value T by calculating
mIN, and by minimum temperature value T
mINsend to the second display module 6.Then, maximum selection rule module 2, summation module 3 and minimum value select module 4 respectively by maximum temperature values T
mAX,all temperature values and, minimum temperature value T
mINend value is sent to get rid of module 7.That described end value gets rid of all temperature values of module 7 and deduct maximum temperature values T
mAXand minimum temperature value T
mIN, obtain two interim temperature value that four temperature probes 1 record and.End value get rid of module 7 by two interim temperature value and send to average module 8, described average module 8 obtains the average temperature value T of these two interim temperature value, and is shown by the 3rd display module 9 by this average temperature value T.It should be noted that average temperature value T is the mean value of other measuring tempeature removed beyond maximum temperature values and minimum temperature value herein; If the quantity of temperature probe 1 is that N (N >=4) is individual herein, then the average temperature value T in average module 8 equals the summation of its temperature value removed beyond maximum temperature values and minimum temperature value divided by (N-2).
Artificial contrasts the numerical value of the first display module 5, second display module 6 and the 3rd display module 9, thus can judge that current judging whether occurs measuring fault.The out temperature monitoring device of the present embodiment one is used for heavy duty gas turbine pneumatic plant, in monitoring, temperature probe 1 signal of pneumatic plant import and export is processed, remove maximum temperature values T
mAXwith minimum temperature value T
mINafterwards, interim temperature value is averaged, thus obtain the measured value of pneumatic plant out temperature more accurately.
Embodiment two
The pneumatic plant out temperature monitoring device of the present embodiment two has measures fault self-monitoring function.Compared with the device of embodiment one, the device of the present embodiment two can but must not comprise the first display module 5, second display module 6 and the 3rd display module 9.In addition, above-mentioned maximum selection rule module 2 and average module 8 are all connected the input end that first does differential mode block 10, thus respectively by maximum temperature values T
mAXbeing input to first with average temperature value T does in differential mode block 10; First does differential mode block 10 calculates maximum temperature values T
mAXwith the difference of average temperature value T.First output terminal doing differential mode block 10 connects the input end of the first temperature dispersion degree upper limit judge module 12, and the first temperature dispersion degree upper limit judge module 12 does difference that differential mode block 10 obtains by first and the temperature dispersion degree upper limit contrasts.Minimum value is selected module 4 to be all connected second with average module 8 and is done differential mode block 11, thus respectively by minimum temperature value T
mINinput described second with average temperature value T and do differential mode block 11.Second output terminal doing differential mode block 11 connects the input end of the second temperature dispersion degree upper limit judge module 13, and the second temperature dispersion degree upper limit judge module 13 does difference that differential mode block 11 obtains by second and the temperature dispersion degree upper limit contrasts.The output terminal of first and second temperature dispersion degree upper limit judge module described connects or door 14, and described or door 14 connects alarm switch.If maximum temperature values T
mAXand the difference between average temperature value T, and minimum temperature value T
mINwith the difference between average temperature value T has at least one to be greater than temperature dispersion degree higher limit, also namely two conditions have at least one to meet, then judge described pneumatic plant out temperature monitoring device occur measure fault, described with or door 14 trigger alarm switch report to the police.
The pneumatic plant out temperature monitoring device of the present embodiment two, can find timely and effectively to measure fault, thus provide reference more accurately for the control of whole heavy duty gas turbine.
Above embodiment is only for illustration of the present invention, but not limitation of the present invention.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, various combination, amendment or equivalent replacement are carried out to technical scheme of the present invention, do not depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a pneumatic plant out temperature monitoring device, is characterized in that, comprises more than four temperature probes; The output terminal of all described temperature probes all selects the input end of module to be connected with maximum selection rule module, summation module and minimum value; Described maximum selection rule module, summation module and minimum value select the output terminal of module to be all connected the input end of end value eliminating module; Described end value gets rid of the input end of the output terminal connection average module of module; Maximum temperature values and average temperature value input first are done differential mode block by described maximum selection rule module and average module respectively; Described first output terminal doing differential mode block connects the input end of the first temperature dispersion degree upper limit judge module; Described minimum value selects module and average module respectively minimum temperature value and average temperature value input second to be done differential mode block; Described second output terminal doing differential mode block connects the input end of the second temperature dispersion degree upper limit judge module; The output terminal connection of first and second temperature dispersion degree upper limit judge module described or the input end of door; Output terminal that is described or door connects alarm switch.
2. a pneumatic plant out temperature monitoring device, is characterized in that, comprises more than four temperature probes; The output terminal of all described temperature probes all selects the input end of module to be connected with maximum selection rule module, summation module and minimum value; Maximum temperature values is sent to the first display module by described maximum selection rule module; Described minimum value selects module that minimum temperature value is sent to the second display module; Described maximum selection rule module, summation module and minimum value select the output terminal of module to be all connected the input end of end value eliminating module; Described end value gets rid of the input end of the output terminal connection average module of module, and the output terminal of described average module connects the 3rd display module.
3. pneumatic plant out temperature monitoring device according to claim 1 and 2, is characterized in that, the quantity of described temperature probe is four.
4. a pneumatic plant out temperature monitoring method, is characterized in that, comprises the following steps:
S1: arrange N number of temperature probe in the import of pneumatic plant or exit position, measure the temperature signal of N number of point, and sent to by all described temperature signals maximum selection rule module, summation module and minimum value to select module, wherein N >=4;
S2: described maximum selection rule module tries to achieve maximum temperature values by calculating, and maximum temperature values is sent to the first display module; Described summation module by calculate try to achieve all temperature values and; Described minimum value selects module to try to achieve minimum temperature value by calculating, and minimum temperature value is sent to the second display module;
S3: described maximum selection rule module, summation module and minimum value select module respectively by maximum temperature values, all temperature values and, minimum temperature value sends to end value to get rid of module, described end value get rid of module calculate all temperature values after removing maximum temperature values and minimum temperature value and;
S4: by all temperature values finally obtained in S3 and send to average module, described average module tries to achieve average temperature value, and this average temperature value is sent to the 3rd display module; In described average module, the acquisition methods of average temperature value is: by all temperature values of finally obtaining in S3 and divided by (N-2), obtain average temperature value.
5. method according to claim 4, is characterized in that, after described S4, also comprise S5: the maximum temperature values obtained in described S2 and minimum temperature value contrasted with the average temperature value that obtains in S4 respectively; If the difference between maximum temperature values and average temperature value, and the difference between minimum temperature value and average temperature value has at least one to be greater than temperature dispersion degree higher limit, then judge that described pneumatic plant out temperature monitoring device occurs measuring fault.
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| CN201510036568.3A CN104596657B (en) | 2015-01-23 | 2015-01-23 | Device and method for monitoring inlet and outlet temperature of gas compressor |
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| CN201510036568.3A CN104596657B (en) | 2015-01-23 | 2015-01-23 | Device and method for monitoring inlet and outlet temperature of gas compressor |
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| CN109556876B (en) * | 2018-11-07 | 2020-09-04 | 国网浙江省电力有限公司电力科学研究院 | Diagnosis method for distinguishing combustion fault of gas turbine and fault of hot channel equipment |
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