CN202391569U - Combustion engine set nitrogen signal acquisition system - Google Patents
Combustion engine set nitrogen signal acquisition system Download PDFInfo
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- CN202391569U CN202391569U CN2011204986153U CN201120498615U CN202391569U CN 202391569 U CN202391569 U CN 202391569U CN 2011204986153 U CN2011204986153 U CN 2011204986153U CN 201120498615 U CN201120498615 U CN 201120498615U CN 202391569 U CN202391569 U CN 202391569U
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Abstract
The utility model relates to a combustion engine set nitrogen signal acquisition system applied to a gas-steam combined cycle power project and mainly solves the problem that a combustion engine set can not continue to run because of no redundant security guarantees when the existing nitrogen acquisition system fails. In the combustion engine set nitrogen signal acquisition system, nitrogen signals of pressure regulating valve front and back monitoring points on nitrogen transmission pipelines are respectively collected by three PLC (programmable logic controllers), data reading and sharing are realized by the three PLC, and the nitrogen signal of each monitoring point is comprehensively treated by three PLC programs to be output to a combustion engine system, therefore, the control device and control means are strengthened, the stability of the combustion engine system is obviously improved by the adoption of three-signal redundancy control, gas-fuel full undisturbed switch of a combustion gas turbine is realized, then interlocking machine halt of a coal compressor, a boiler, a steam turbo-generator and the like is reduced, the impact on a power grid by starting and sudden tripping of the set is reduced, single controller output failure or dual controller switch instant output failure is avoided, and safe operation of the entire generator set is ensured.
Description
Technical field
The utility model relates to a kind of data acquistion system, specifically a kind of combustion machine unit nitrogen signal acquiring system that is applied to the gas steam combined cycle for power generation project.
Background technique
Gas steam combined cycle for power generation project master be with the blast furnace gas that produces in steel-making, ironmaking and the coking production process and coke-stove gas through mix, low-heat value gas after the pressurization is fuel, carries out the secondary environmental protection utilization of the energy.Because inflammable, explosive, the easy poisoning characteristic of coal gas; So the safe combustion to mixed gas when burning requires very strict; According to the U.S. GE company gas turbine mixed gas pipeline is blown experimental requirements clearly; Nitrogen blows clearly and must carry out off-line and blow experiment clearly, onlinely blow twice experiment of experiment clearly, and the oxygen content in the gas pipe line drops to below 1% at the appointed time, to guarantee the safe, stable of gas firing; Whole experiment needs the time in two weeks, and this is necessary to whole gas turbine engine systems.Simultaneously; Gas turbine requires to blow over clearly at whole nitrogen that ducted nitrogen pressure maintains 2.9 ± 0.1Mpa in the journey; And if high pressure nitrogen gas holder pressure is lower than 3.62Mpa then gets into one-level and report to the police, then get into secondary and report to the police if be lower than 3.31Mpa, if low still pressure is low after 15 seconds to the 3.0Mpa time-delay; Then unit will get into three grades of warnings, and change quick shutdown automatically over to.In case and gas turbine is shut down or the jumping machine, will cause units such as boiler, steam turbine generator subsequently to be shut down in the lump, directly have influence on the normal operation and the generating efficiency of whole generating system.
At present; The nitrogen signal acquiring system is as an important ring in the gas turbine engine systems and since three upstream pressures that are used for that nitrogen blows clearly and three downstream pressure totally 6 nitrogen signals transfer to 6 gas turbine control systems through three AO fasteners outputs of a cover DCS system, in case and the DCS control system goes wrong; Perhaps a certain module breaks down; Or two gas turbines carry out nitrogen simultaneously and blow clearly, and situation such as distortion appear in the collection in worksite point, and then gas turbine receives wrong nitrogen pressure signal; Thereby cause the chain shutdown simultaneously of 6 combustion machine units, the whole generating system paralyses.Simultaneously, if the clear blow pressure power of nitrogen is defective, can't guarantee at 2.9 ± 0.1mPa; Oxygen in the gas pipe line does not thoroughly purge clean; Cause very easily that then burning is dangerous, very likely can cause human casualty accident under the serious situation, this is extremely disadvantageous for safety in production.Therefore, original nitrogen acquisition system does not have redundant safety assurance because control apparatus and control device are single, when this system breaks down, can't realize firing the continuation operation of machine unit at all, directly influences the ordinary production of power generation system.
The model utility content
To above-mentioned deficiency; The utility model provides a kind of combustion machine unit nitrogen signal acquiring system; It not only adopts redundant nitrogen acquisition system; System provides safety assurance for the combustion machine, and has avoided causing firing the phenomenon generation that the machine unit can't normally move owing to the nitrogen acquisition system breaks down.
The technological scheme that its technical problem of the utility model solution is taked is: combustion machine unit nitrogen signal acquiring system; Comprise controller, signal pickup assembly and signal output apparatus; Said signal pickup assembly links to each other with the input end of controller; The output terminal of said controller links to each other with signal output apparatus, it is characterized in that, said controller comprises three PLC controllers that link to each other through MPI global data communication modes; Said signal pickup assembly is gathered the nitrogen signal of monitoring point behind preceding monitoring point of nitrogen pressure regulator valve and the pressure regulator valve respectively; And the nitrogen signal of gathering sent to the PLC controller respectively, said PLC controller compares analysis to the nitrogen signal that receives, and will signal message after treatment sends to corresponding combustion machine system through signal output apparatus.
Said PLC controller adopts the double loop power supply power supply.
The nitrogen signal that said PLC controller receives comprises the nitrogen signal of monitoring point behind nitrogen signal and the pressure regulator valve of a preceding monitoring point of nitrogen pressure regulator valve at least.
The beneficial effect of the utility model is: the utility model is gathered the nitrogen signal of monitoring point, pressure regulator valve front and back on the nitrogen gas delivery-line respectively through three PLC controllers; And through the MPI global data bus three PLC controllers are connected the data of accomplishing each controller and read together and enjoy; Like this; After the nitrogen signal of each monitoring point handled through three PLC program synthesis, export combustion machine system to, not only control apparatus and control device are able to strengthen; And the employing of three signal redundancy controls obviously improves the stability of combustion machine system; Realized gas turbine gas, oil completely without disturbing switching, and then reduced the chain shutdown of coal press machine, boiler, steam turbine generator etc., reduced because of unit starting and jumping machine suddenly to the impact of electrical network; Avoid single controller output fault or dual controller to switch moment output fault, guaranteed the safe operation of whole generating unit.
Description of drawings
Fig. 1 is the theory diagram of the utility model;
Fig. 2 is the structural representation of the utility model;
Wherein, the machine systems are fired in monitoring point signal output interface, 4 nitrogen compressors, 5 high pressure nitrogen officials, 61 first modulating valve, 62 second modulating valve, 71 first combustion machine systems, 72 second combustion machine systems, 73 the 3rd behind monitoring point signal output interface, 36 the 3rd pressure regulator valves behind monitoring point signal output interface, 35 second pressure regulator valves behind monitoring point signals collecting interface, 3 signal output apparatus, the preceding monitoring point of 31 first pressure regulator valves signal output interface, the preceding monitoring point of 32 second pressure regulator valves signal output interface, the preceding monitoring point of 33 the 3rd pressure regulator valves signal output interface, 34 first pressure regulator valves behind monitoring point signals collecting interface, 26 the 3rd pressure regulator valves behind monitoring point signals collecting interface, 25 second pressure regulator valves behind 11 the one PLC controllers, 12 the 2nd PLC controllers, 13 the 3rd PLC controllers, 2 signal pickup assemblies, the preceding monitoring point of 21 first pressure regulator valves signals collecting interface, the preceding monitoring point of 22 second pressure regulator valves signals collecting interface, the preceding monitoring point of 23 the 3rd pressure regulator valves signals collecting interface, 24 first pressure regulator valves, machine systems, 76 the 6th combustion machine systems are fired in 74 the 4th combustion machine systems, 75 the 5th.
Embodiment
As depicted in figs. 1 and 2, a kind of combustion machine unit nitrogen signal acquiring system comprises a PLC controller 11, the 2nd PLC controller 12, the 3rd PLC controller 13, signal pickup assembly 2 and signal output apparatus 3.Said three PLC interconnect through MPI global data communication modes, and said signal pickup assembly 2 links to each other with the input end of three PLC controllers, and the output terminal of said three PLC controllers links to each other with signal output apparatus 3; Said signal pickup assembly comprises behind monitoring point signals collecting interface 24 behind the preceding monitoring point of first pressure regulator valve signals collecting interface 21, the preceding monitoring point of second pressure regulator valve signals collecting interface 22, the preceding monitoring point of the 3rd pressure regulator valve signals collecting interface 23, first pressure regulator valve, second pressure regulator valve signals collecting interface 26 6 signals collecting interfaces in monitoring point behind the monitoring point signals collecting interface 25 and the 3rd pressure regulator valve; Gather the nitrogen signal of monitoring point behind preceding monitoring point of nitrogen pressure regulator valve and the pressure regulator valve respectively; And the nitrogen signal of gathering sent to the relevant PLC controller respectively; The nitrogen signal that said PLC controller receives oneself and compare analysis from the nitrogen signal of other monitoring point that other PLC controllers are shared, and will signal message after treatment send to corresponding combustion machine system through signal output apparatus 3.
The utility model is gathered the nitrogen signal of monitoring point, pressure regulator valve front and back on the nitrogen gas delivery-line respectively through three PLC controllers; And through the MPI global data bus three PLC controllers are connected the data of accomplishing each controller and read together and enjoy, like this, after the nitrogen signal of each monitoring point handled through three PLC program synthesis; Export combustion machine system to; Not only control apparatus and control device are able to strengthen, and the employing of three signal redundancies control obviously improves the stability of combustion machine system, have realized that gas turbine gas, oil are completely without disturbing switching; And then reduced the chain shutdown of coal press machine, boiler, steam turbine generator etc.; Reduced because of unit starting and of the impact of unexpected jumping machine, avoided single controller output fault or dual controller to switch moment output fault, guaranteed the safe operation of whole generating unit electrical network.
Claims (3)
1. fire machine unit nitrogen signal acquiring system; Comprise controller, signal pickup assembly and signal output apparatus; Said signal pickup assembly links to each other with the input end of controller; The output terminal of said controller links to each other with signal output apparatus, it is characterized in that, said controller comprises three PLC controllers that link to each other through MPI global data communication modes; Said signal pickup assembly is gathered the nitrogen signal of monitoring point behind preceding monitoring point of nitrogen pressure regulator valve and the pressure regulator valve respectively; And the nitrogen signal of gathering sent to the PLC controller respectively, said PLC controller compares analysis to the nitrogen signal that receives, and will signal message after treatment sends to corresponding combustion machine system through signal output apparatus.
2. combustion machine unit nitrogen signal acquiring system according to claim 1 is characterized in that, said PLC controller adopts the double loop power supply power supply.
3. combustion machine unit nitrogen signal acquiring system according to claim 1 is characterized in that, the nitrogen signal that said PLC controller receives comprises the nitrogen signal of monitoring point behind nitrogen signal and the pressure regulator valve of a preceding monitoring point of nitrogen pressure regulator valve at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204986153U CN202391569U (en) | 2011-12-05 | 2011-12-05 | Combustion engine set nitrogen signal acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204986153U CN202391569U (en) | 2011-12-05 | 2011-12-05 | Combustion engine set nitrogen signal acquisition system |
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| Publication Number | Publication Date |
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| CN202391569U true CN202391569U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204986153U Expired - Fee Related CN202391569U (en) | 2011-12-05 | 2011-12-05 | Combustion engine set nitrogen signal acquisition system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543654A (en) * | 2013-11-14 | 2014-01-29 | 杭州和利时自动化有限公司 | Method for controlling three-machine redundancy control system to shut down |
-
2011
- 2011-12-05 CN CN2011204986153U patent/CN202391569U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543654A (en) * | 2013-11-14 | 2014-01-29 | 杭州和利时自动化有限公司 | Method for controlling three-machine redundancy control system to shut down |
| CN103543654B (en) * | 2013-11-14 | 2016-08-17 | 杭州和利时自动化有限公司 | A kind of method controlling the shutdown of three-basic training control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20161205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |