CN103499958A - Method and device for controlling MFT (Main Fuel Trip) - Google Patents
Method and device for controlling MFT (Main Fuel Trip) Download PDFInfo
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- CN103499958A CN103499958A CN201310459757.2A CN201310459757A CN103499958A CN 103499958 A CN103499958 A CN 103499958A CN 201310459757 A CN201310459757 A CN 201310459757A CN 103499958 A CN103499958 A CN 103499958A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a method and a device for controlling MFT (Main Fuel Trip). The device comprises an OR gate, wherein a combustion flame loss signal and a power supply loss signal are used as input signals of the OR gate, and an output end of the OR gate is connected with all-flame loss MFT of a boiler. According to the method and the device, disclosed by the invention, main protection control logic of the all-flame loss MFT can be more reliable, a mis-operation action caused by an abnormal situation of a power supply can be avoided, and thus the normal production operation of a power station can be ensured.
Description
Technical field
The present invention relates to power field, particularly, relate to a kind of main burning tripping operation (MFT) control method and equipment.
Background technology
In the thermal power generation unit, general boiler burner from bottom to top grinds layout according to A mill, AB oil gun, B mill, C mill, CD oil gun, D mill, E mill, EF oil gun, F, be furnished with respectively fire inspection sensor on every grate firing burner, for example be arranged in four jiaos of boiler, in order to monitor the flame combustion situation at each angle of each layer.The flame detecting probe power acquisition designs with redundance type, by the first AC/DC converting circuit 105 by ups power 101(220V alternating voltage) be converted into the 24V DC voltage, by the second AC/DC converting circuit 107 by emergency power supply 103(220V alternating voltage) be converted into the 24V DC voltage, two-way 24V direct supply is the flame detecting probe power supply after 109 decoupling zeros of decoupling zero diode, as shown in Figure 1.
In order to monitor the flame detecting probe electric power thus supplied, in prior art, utilize 201 pairs of supply voltages of DCS system to be monitored, as shown in Figure 2.Thisly realize that logic can guarantee in the genset operational process, if flame detecting probe detects abnormal signal (in the situation of flame detecting probe normal operation of sensor), can trigger main protection of boiler MFT action logic, and interlock steam turbine and generator tripping.The defect of prior art is; in the situation that the power supply abnormal of flame detecting probe; can make flame detecting probe monitor abnormal signal, lose MFT main protection action thereby also can trigger the full fuel of boiler, but this MFT main protection action not be that genset is in service desired.
Summary of the invention
The purpose of this invention is to provide a kind of MFT control method and equipment, to prevent avoiding affecting the normal production operation of generating plant because of the undesired MFT of the causing main protection action of power work.
To achieve these goals, the invention provides a kind of MFT opertaing device, this equipment comprises or door, combustion flame lose signal and power supply lose signal as or the input signal of door, described or gate output terminal is connected with the full loss of flame MFT of boiler.
Preferably, described combustion flame forfeiture signal comprises A layer combustion flame forfeiture signal, AB layer combustion flame forfeiture signal, B layer combustion flame forfeiture signal, C layer combustion flame forfeiture signal, CD layer combustion flame forfeiture signal, D layer combustion flame forfeiture signal, E layer combustion flame forfeiture signal, EF layer combustion flame forfeiture signal and F layer combustion flame forfeiture signal.
Preferably, this equipment comprises Sheffer stroke gate, and the first input end that the first power supply is lost signal and described Sheffer stroke gate is connected, and the second input end that second source is lost signal and described Sheffer stroke gate is connected, and the output signal of described Sheffer stroke gate is that described power supply is lost signal.
Preferably, described or the door comprise first or the door and second or, described combustion flame is lost signal as first or the input signal of door, described first or the output signal of door and described power supply lose signal as described second or the input signal of door, described second or the output terminal of door with the full loss of flame MFT of described boiler, be connected.
Preferably, the first power supply is connected with flame detecting probe through the decoupling zero diode with second source.
Preferably, described the first power supply and the first predetermined voltage are relatively exported described the first power supply and are lost signal, and described second source and the second predetermined voltage are relatively exported second source and lost signal.
Preferably, described power supply is lost signal and is also inputted the DCS surveillance, and described DCS surveillance is lost signal according to power supply and confirmed power supply forfeiture alarm.
The invention provides a kind of MFT control method, the method comprises: receive combustion flame and lose signal and power supply forfeiture signal; Described combustion flame forfeiture signal and power supply forfeiture signal are done to exclusive disjunction; And utilize the full loss of flame MFT of exclusive disjunction output control boiler.
Preferably, described combustion flame forfeiture signal comprises A layer combustion flame forfeiture signal, AB layer combustion flame forfeiture signal, B layer combustion flame forfeiture signal, C layer combustion flame forfeiture signal, CD layer combustion flame forfeiture signal, D layer combustion flame forfeiture signal, E layer combustion flame forfeiture signal, EF layer combustion flame forfeiture signal and F layer combustion flame forfeiture signal.
Preferably, the method also comprises:
The first power supply is lost to signal and second source to be lost signal and does NAND operation and generate described power supply and lose signal.
Preferably, described combustion flame being lost to signal and power supply loses signal and does exclusive disjunction and comprise: described combustion flame is lost to signal and do the first exclusive disjunction, and the result of this first exclusive disjunction and described power supply forfeiture signal are done to the second exclusive disjunction.
Preferably, described combustion flame is lost signal to be provided by flame detecting probe, and the first power supply and second source are described flame detecting probe power supply through the decoupling zero diode.
Preferably, described the first power supply is lost signal and is relatively obtained by described the first power supply and the first predetermined voltage, and described second source is lost signal and relatively obtained by second source and the second predetermined voltage.
Preferably, the method also comprises: described power supply is lost signal input DCS surveillance; And
Described DCS surveillance is lost signal according to power supply and is confirmed power supply forfeiture alarm.
It will be more reliable that the present invention can make full loss of flame MFT main protection steering logic, avoid the error protection action produced because power supply is undesired, thereby can guarantee the normal production operation of generating plant.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
The accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms the part of instructions, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is flame detecting probe electric power-feeding structure schematic diagram in prior art;
Fig. 2 is power monitoring structural representation in prior art;
Fig. 3 is the circuit diagram that generation power supply provided by the invention is lost signal;
Fig. 4 is full loss of flame MFT steering logic schematic diagram provided by the invention;
Fig. 5 is MFT control method process flow diagram provided by the invention.
Description of reference numerals
101 ups power 103 emergency power supplies
105 the one AC/DC converter 107 the 2nd AC/DC converters
109 decoupling zero diode 111 A layer flame detecting probe power supplys
113 AB layer flame detecting probe power supply 115 B layer flame detecting probe power supplys
117 C layer flame detecting probe power supply 119 CD layer flame detecting probe power supplys
121 D layer flame detecting probe power supply 123 E layer flame detecting probe power supplys
125 EF layer flame detecting probe power supply 127 F layer flame detecting probe power supplys
201 DCS surveillance 301 first comparers
303 second comparer 305 Sheffer stroke gates
307 power supplys are lost signal 401 A layer combustion flame and are lost signal
403 AB layer combustion flame are lost signal 405 B layer combustion flame and are lost signal
407 C layer combustion flame are lost signal 409 CD layer combustion flame and are lost signal
411 D layer combustion flame are lost signal 413 E layer combustion flame and are lost signal
415 EF layer combustion flame are lost signal 417 F layer combustion flame and are lost signal
419 first or the door 421 second or the door
423 full loss of flame MFT
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
In the production operation process in generating plant; abnormal situation may occur in power supply; thereby cause the flame detecting probe cisco unity malfunction; and in the testing result of all flame detecting probes all in abnormal situation; can cause full loss of flame MFT that the protection action occurs, thereby whole production operation is exerted an adverse impact.
In order to address this problem, the invention provides a kind of MFT opertaing device, this equipment comprises or door, combustion flame lose signal and power supply lose signal as or the input signal of door, described or gate output terminal is connected with the full loss of flame MFT of boiler.Principle according to digital signal, can implement multiple implementation, for example combustion flame being lost to signal and power supply loses in that signal is exported as same many input lists or door, thereby realize combustion flame is lost the logical OR function of signal and power supply forfeiture signal, also can respectively different signals be carried out to exclusive disjunction, and then the result of exclusive disjunction is carried out to exclusive disjunction again.From digital signal in theory, these embodiments can be realized identical arithmetic logic.For combustion flame is lost signal, for the different layout of boiler of different generator factory, can there is different combustion flames to lose signal, for example can comprise that A layer combustion flame forfeiture signal 401, AB layer combustion flame forfeiture signal 403, B layer combustion flame forfeiture signal 405, C layer combustion flame are lost signal 407, CD layer combustion flame lost signal 409, D layer combustion flame forfeiture signal 411, E layer combustion flame forfeiture signal 143, EF layer combustion flame forfeiture signal 415 and F layer combustion flame and lost signal 417.
Lose signal in order to obtain power supply, Fig. 3 shows a kind of implementation.As shown in Figure 3, for the ease of d. c. voltage signal is carried out to the logic judgement, the output voltage of the one AC/DC converter 105 can be inputted the first comparer 301, by the preset voltage with the first comparer 301, for example first power supply that relatively obtains of 21V is lost signal, whether the output voltage that can judge an AC/DC converter 105 according to this first power supply forfeiture signal is lost, at the output voltage of an AC/DC converter 105 during lower than 21V, judge the output voltage forfeiture of an AC/DC converter 105, the power supply that is also flame detecting probe is lost, otherwise the output voltage of judging an AC/DC converter 105 is normal.In like manner, the output voltage of the 2nd AC/DC converter 107 can be inputted the second comparer 303, by the preset voltage with the second comparer 303, for example the second source that relatively can obtain of 21V is lost signal, whether the output voltage that can judge the 2nd AC/DC converter 107 according to this second source forfeiture signal is lost, at the output voltage of the 2nd AC/DC converter 105 during lower than 21V, judge the output voltage forfeiture of the 2nd AC/DC converter 105, the power supply that is also flame detecting probe is lost, otherwise judges that the output voltage of the 2nd AC/DC converter 105 is normal.
For the output voltage (the first power supply) of considering an AC/DC converter 105 and the output voltage (second source) of the 2nd AC/DC converter 105 simultaneously; when the output voltage of guaranteeing the output voltage of an AC/DC converter 105 and the 2nd AC/DC converter 105 is all normal; full flame MFT protection could occur; the first power supply forfeiture signal and second source forfeiture signal need to be carried out to NAND operation; by follow-up exclusive disjunction; while making any one power supply break down, the protection action can not occur in the full loss of flame MFT423 of boiler.
In order correctly to control the full loss of flame MFT423 of boiler, correctly move, several combustion flames are lost signals can input first or door 419, and by first or door 419 exclusive disjunction result be input to second or door 421, simultaneously power supply is lost signal 307 and is also inputted second or door 421, by second or the door computing, only can guarantee when the output voltage (second source) of the output voltage (the first power supply) of an AC/DC converter 105 and the 2nd AC/DC converter 105 is all normal, the protection action just may occur in the full loss of flame MTF of boiler, for example A layer combustion flame lost signal 401, AB layer combustion flame lost signal 403, B layer combustion flame lost signal 405, C layer combustion flame lost signal 407, CD layer combustion flame lost signal 409, D layer combustion flame lost signal 411, E layer combustion flame lost signal 143, EF layer combustion flame lost signal 415, and F layer combustion flame lost signal 417 all in abnormal situation.
In addition, the output voltage (second source) of the output voltage of an AC/DC converter 105 (the first power supply) and the 2nd AC/DC converter 105 is connected with flame detecting probe through decoupling zero diode 109, thereby can power for flame detecting probe.Described power supply is lost signal and is also inputted the DCS surveillance, and described DCS surveillance is lost signal according to power supply and confirmed power supply forfeiture alarm.
Correspondingly, the invention provides a kind of MFT control method, the method comprises: receive combustion flame and lose signal and power supply forfeiture signal (step 501); Described combustion flame forfeiture signal and power supply forfeiture signal are done to exclusive disjunction (step 503); And utilize the full loss of flame MFT(of exclusive disjunction output control boiler step 505).Described power supply forfeiture signal can be done NAND operation by the first power supply forfeiture signal and second source forfeiture signal and obtain.Preferably, described combustion flame being lost to signal and power supply loses signal and does exclusive disjunction and comprise: described combustion flame is lost to signal and do the first exclusive disjunction, and the result of this first exclusive disjunction and described power supply forfeiture signal are done to the second exclusive disjunction.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (14)
1. a MFT opertaing device, is characterized in that, this equipment comprises or door, combustion flame lose signal and power supply lose signal as or the input signal of door, described or gate output terminal is connected with the full loss of flame MFT of boiler.
2. equipment according to claim 1, it is characterized in that, described combustion flame is lost signal and is comprised that A layer combustion flame forfeiture signal, AB layer combustion flame forfeiture signal, B layer combustion flame forfeiture signal, C layer combustion flame are lost signal, CD layer combustion flame lost signal, D layer combustion flame forfeiture signal, E layer combustion flame forfeiture signal, EF layer combustion flame forfeiture signal and F layer combustion flame and lost signal.
3. equipment according to claim 1, it is characterized in that, this equipment comprises Sheffer stroke gate, the first input end that the first power supply is lost signal and described Sheffer stroke gate is connected, the second input end that second source is lost signal and described Sheffer stroke gate is connected, and the output signal of described Sheffer stroke gate is that described power supply is lost signal.
4. equipment according to claim 1, it is characterized in that, described or the door comprise first or the door and second or, described combustion flame is lost signal as first or the input signal of door, described first or the output signal of door and described power supply lose signal as described second or the input signal of door, described second or the output terminal of door with the full loss of flame MFT of described boiler, be connected.
5. equipment according to claim 3, is characterized in that, the first power supply is connected with flame detecting probe through the decoupling zero diode with second source.
6. equipment according to claim 5, is characterized in that, described the first power supply and the first predetermined voltage are relatively exported described the first power supply and lost signal, and described second source and the second predetermined voltage are relatively exported second source and lost signal.
7. according to the described equipment of claim 1-6 any one, it is characterized in that, described power supply is lost signal and is also inputted the DCS surveillance, and described DCS surveillance is lost signal according to power supply and confirmed power supply forfeiture alarm.
8. a MFT control method, is characterized in that, the method comprises:
Receive combustion flame and lose signal and power supply forfeiture signal;
Described combustion flame forfeiture signal and power supply forfeiture signal are done to exclusive disjunction; And
Utilize the full loss of flame MFT of exclusive disjunction output control boiler.
9. method according to claim 8, it is characterized in that, described combustion flame is lost signal and is comprised that A layer combustion flame forfeiture signal, AB layer combustion flame forfeiture signal, B layer combustion flame forfeiture signal, C layer combustion flame are lost signal, CD layer combustion flame lost signal, D layer combustion flame forfeiture signal, E layer combustion flame forfeiture signal, EF layer combustion flame forfeiture signal and F layer combustion flame and lost signal.
10. method according to claim 8, is characterized in that, the method also comprises:
The first power supply is lost to signal and second source to be lost signal and does NAND operation and generate described power supply and lose signal.
11. method according to claim 8, is characterized in that, described combustion flame lost to signal and power supply and lose signal and do exclusive disjunction and comprise:
Described combustion flame is lost to signal and do the first exclusive disjunction, and the result of this first exclusive disjunction and described power supply forfeiture signal are done to the second exclusive disjunction.
12. method according to claim 8, is characterized in that, described combustion flame is lost signal to be provided by flame detecting probe, and the first power supply and second source are described flame detecting probe power supply through the decoupling zero diode.
13. method according to claim 10, is characterized in that, described the first power supply is lost signal and is relatively obtained by described the first power supply and the first predetermined voltage, and described second source is lost signal and relatively obtained by second source and the second predetermined voltage.
14. the described method of according to Claim 8-13 any one, is characterized in that, the method also comprises:
Described power supply is lost signal input DCS surveillance; And
Described DCS surveillance is lost signal according to power supply and is confirmed power supply forfeiture alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310459757.2A CN103499958A (en) | 2013-09-30 | 2013-09-30 | Method and device for controlling MFT (Main Fuel Trip) |
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| CN201310459757.2A CN103499958A (en) | 2013-09-30 | 2013-09-30 | Method and device for controlling MFT (Main Fuel Trip) |
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| CN103499958A true CN103499958A (en) | 2014-01-08 |
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| CN201310459757.2A Pending CN103499958A (en) | 2013-09-30 | 2013-09-30 | Method and device for controlling MFT (Main Fuel Trip) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104932460A (en) * | 2015-04-30 | 2015-09-23 | 郑州荣奇热电能源有限公司 | MFI and desulphurization system signal communication method |
| CN109471414A (en) * | 2018-10-23 | 2019-03-15 | 国网天津市电力公司电力科学研究院 | Improve the control loop and method of 300MW coal unit MFT reliability |
| CN111220204A (en) * | 2018-11-26 | 2020-06-02 | 上海梅山钢铁股份有限公司 | Prevent breathing heavily regulation control system mistake proofing detection device |
| WO2023202630A1 (en) * | 2022-04-20 | 2023-10-26 | 华能罗源发电有限责任公司 | Heat-engine plant boiler flame detector power supply distribution optimization device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104932460A (en) * | 2015-04-30 | 2015-09-23 | 郑州荣奇热电能源有限公司 | MFI and desulphurization system signal communication method |
| CN104932460B (en) * | 2015-04-30 | 2017-07-11 | 郑州荣奇热电能源有限公司 | MFT and desulphurization system a kind of signal communication method |
| CN109471414A (en) * | 2018-10-23 | 2019-03-15 | 国网天津市电力公司电力科学研究院 | Improve the control loop and method of 300MW coal unit MFT reliability |
| CN111220204A (en) * | 2018-11-26 | 2020-06-02 | 上海梅山钢铁股份有限公司 | Prevent breathing heavily regulation control system mistake proofing detection device |
| WO2023202630A1 (en) * | 2022-04-20 | 2023-10-26 | 华能罗源发电有限责任公司 | Heat-engine plant boiler flame detector power supply distribution optimization device |
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Application publication date: 20140108 |