CN208587193U - A kind of control system of steam turbine - Google Patents
A kind of control system of steam turbine Download PDFInfo
- Publication number
- CN208587193U CN208587193U CN201820574362.5U CN201820574362U CN208587193U CN 208587193 U CN208587193 U CN 208587193U CN 201820574362 U CN201820574362 U CN 201820574362U CN 208587193 U CN208587193 U CN 208587193U
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- China
- Prior art keywords
- signal
- door
- mould group
- steam turbine
- shaft position
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Abstract
The utility model discloses a kind of control system of steam turbine, including at least four shaft position sensors, the safety monitoring mould group being electrically connected respectively with each shaft position sensor, and the emergency trip protection mould group being connect with safety monitoring mould group.This system takes " series-parallel " decision logic, as long as left and right side and at least having rotor position protection signal to issue respectively, will trigger steam turbine trip signal；A possibility that reducing relay fail, and a possibility that reduce false protection；Simultaneously; protection signal between safety monitoring mould group and emergency trip protection mould group is divided into the transmission of three tunnels; and " two from three " logic judgment is carried out in emergency trip protection mould group; substantially reduce the probability of false protection and tripping; anti-interference ability is stronger, improves the accuracy and reliability of turbine shaft axial displacement protection signal.
Description
Technical field
The utility model relates to steam turbine technology field more particularly to a kind of control systems of steam turbine.
Background technique
The distance that turbine rotor is axially moveable axial displacement, axial displacement reflection be steam turbine rotating part and
The relative position of stationary part, the variation that axial displacement variation and steamer machine stator and rotor axial relative position occur.
Usual steam turbine axial displacement signal is measured by the safety monitoring system (abbreviation TSI system) of steam turbine, works as axial direction
When the permissible value that displacement signal is run beyond Turbine Safety, TSI system needs to send stoppage protection signal to turbine emergency
It interdicts protection system (abbreviation ETS system), emergency shutdown causes equipment damage to avoid steam turbine impact and rub.
But an axial displacement measuring point is usually arranged in existing steam turbine, is sent by the measurement of TSI system to ETS system
System, generates the stoppage protection logic of axial displacement signal.It is electric when being connected between TSI system output channel, TSI system and ETS system
When cable, any link of ETS system input channel break down, it may cause the malfunction or tripping of rotor position protection, cause
The improper stoppage in transit of Steam Turbine or equipment damage.
Summary of the invention
In view of the above deficiencies, the purpose of the utility model is to provide a kind of control system of steam turbine, the system rejection to disturbance
Ability is stronger, greatly reduces the probability of false protection and tripping, improves the accuracy of turbine shaft axial displacement protection signal
And reliability.
To achieve the above object, the technical solution of the utility model is:
A kind of control system of steam turbine, comprising:
At least four shaft position sensors, the probe of all shaft position sensors sets up separately to be turned in the steam turbine
The two sides of son；
For exporting the safety monitoring mould group of stoppage protection signal, the safety monitoring Mo Zu respectively with each axial position
The axial displacement signal of each shaft position sensor acquisition is read in displacement sensor electrical connection；The safety monitoring mould group packet
Include or door A or door B and with door C；Wherein, with two input terminals of door C respectively with or door A output end and/or door B it is defeated
Outlet connection；Wherein or door A includes at least two input terminals, and each input terminal is respectively connected to be located at each of the steam turbine side
The axial displacement signal of the shaft position sensor acquisition；Wherein or door B includes at least two input terminals, each input terminal point
The axial displacement signal of each shaft position sensor acquisition of the steam turbine other side Jie Ru be located at；
Emergency trip for controlling the halt turbines protects mould group, and the emergency trip protection mould group includes three
Output channel and signal processing module, three output channels are separately connected the output end with door C, and three outputs are logical
The output end in road is respectively connected to the signal processing module；
The signal processing module is judged according to the action signal that transmits of three output channels, and movement is taken to believe
For the action signal of number identical two output channels as trip signal, the trip signal is transferred to the steam turbine.
Preferred embodiment is, including four shaft position sensors.
Preferred embodiment is that the probe of all shaft position sensors uniformly sets up separately the two of the turbine rotor
Side.
After adopting the above technical scheme, the beneficial effects of the utility model are:
Due to the control system of the steam turbine of the utility model, comprising: at least four shaft position sensors, all axial directions
The probe of displacement sensor sets up separately in the two sides of turbine rotor；It, should for exporting the safety monitoring mould group of stoppage protection signal
Safety monitoring Mo Zu is electrically connected with each shaft position sensor respectively, reads the axial displacement letter of each shaft position sensor acquisition
Number；Safety monitoring mould group include or door A or door B and with door C；Wherein, with two input terminals of door C respectively with or door A
The connection of the output end of output end and/or door B；Wherein or door A includes at least two input terminals, and each input terminal is respectively connected to be located at institute
State the axial displacement signal of each shaft position sensor acquisition of steam turbine side；Wherein or door B includes at least two inputs
End, each input terminal are respectively connected to be located at the axial displacement signal of each shaft position sensor acquisition of the steam turbine other side；For
The emergency trip for controlling halt turbines protects mould group, and it includes at three output channels and signal which, which protects mould group,
Module is managed, three output channels are separately connected the output end with door C, and the output end of three output channels is respectively connected to signal processing
Module；Signal processing module is judged according to the action signal that transmits of three output channels, and takes action signal identical two
For the action signal of a output channel as trip signal, trip signal is transferred to the steam turbine.As it can be seen that this system takes
" series-parallel " decision logic will trigger steam turbine as long as left and right side and at least having rotor position protection signal to issue respectively
Trip signal；A possibility that reducing relay fail, and a possibility that reduce false protection；Meanwhile safety monitoring mould group with
Protection signal between emergency trip protection mould group is divided into the transmission of three tunnels, and carries out " two from three " logic in emergency trip protection mould group
Judgement, substantially reduces the probability of false protection and tripping, anti-interference ability is stronger, improves turbine shaft axial displacement protection signal
Accuracy and reliability.
Detailed description of the invention
Fig. 1 is the logical schematic of the control system of the utility model steam turbine；
In figure: 1- safety monitoring mould group, 2- emergency trip protect mould group.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
As shown in Figure 1, a kind of control system of steam turbine, comprising:
The probe of at least four shaft position sensors, all shaft position sensors sets up separately the two of turbine rotor
Side；For example, four shaft position sensors of setting, two are respectively provided on the left of turbine rotor above and below, other two sets respectively
It sets upper and lower on the right side of turbine rotor.
For exporting the safety monitoring mould group 1 of stoppage protection signal, safety monitoring mould group 1 is sensed with each axial displacement respectively
The axial displacement signal of each shaft position sensor acquisition is read in device electrical connection, and axial displacement signal is respectively as follows: in the present embodiment
Axial displacement (upper left), axial displacement (lower-left), axial displacement (upper right), axial displacement (bottom right).Safety monitoring mould group 1 receives
Signal processing is carried out after to axial position signal, generates above-mentioned each axial displacement respectively, when axial displacement is greater than permissible value,
1 output signal of safety monitoring mould group is high level, and when being not more than permissible value, output signal is low level.
Safety monitoring mould group 1 include or door A or door B and with door C；Wherein, with two input terminals of door C respectively with or
The output end connection of the output end and/or door B of door A；Wherein or door A includes at least two input terminals, and each input terminal is respectively connected to
It is located at the axial displacement signal of each shaft position sensor acquisition of steam turbine side；Wherein or door B includes at least two inputs
End, each input terminal are respectively connected to be located at the axial displacement signal of each shaft position sensor acquisition of the steam turbine other side.According to
After the setting of above-mentioned logical relation or the axial displacement signal of any one shaft position sensor acquisition of the door A on the left of steam turbine
When greater than permissible value, output high level gives a C；After being arranged according to above-mentioned logical relation or door B is on the right side of steam turbine
When the axial displacement signal of any one shaft position sensor acquisition is greater than permissible value, output high level gives a C；And with
Door C exports high level, that is, the big shutdown of output when the axial displacement signal of turbine rotor two sides is all larger than permissible value
Signal is protected, big stoppage protection signal exports from three channel D0 protect mould group 2 to emergency trip respectively.
Emergency trip for controlling halt turbines protects mould group 2, and it includes that three outputs are logical that emergency trip, which protects mould group 2,
C1, C2 and C3 and signal processing module, three output channels C1, C2 and C3 are separately connected the output end with door C, three outputs
The output end in channel is respectively connected to signal processing module.
Signal processing module is judged according to the action signal DI that transmits of three output channels C1, C2 and C3, and is taken
Make the action signal DI of identical two output channels of signal DI as trip signal, that is, " two from three " logic judgment, jumps
Lock signal is transferred to steam turbine.
The probe of the structure advanced optimized, all shaft position sensors uniformly sets up separately in the two sides of turbine rotor.
In conclusion the system of the utility model, takes " series-parallel " decision logic, turbine rotor left and right side is only
It wants and at least there is a rotor position protection signal to issue respectively, steam turbine trip signal will be triggered.Compared with prior art, both
A possibility that reducing relay fail, and a possibility that reduce false protection.Safety monitoring mould group 1 and emergency trip protect mould
Protection signal between group 2 is divided into the transmission of three tunnels, and carries out " two from three " logic judgment in emergency trip protection mould group 2, and existing
Technology is compared, and the probability of false protection and tripping can be substantially reduced.
The preferred embodiment of the utility model described above, is not intended to limit the utility model, all practical at this
Made any modification within novel spirit and principle, etc. the improvement of the Control system architecture of same steam turbine etc., should all
It is included within the scope of protection of this utility model.
Claims (3)
1. a kind of control system of steam turbine characterized by comprising
The probe of at least four shaft position sensors, all shaft position sensors sets up separately in the turbine rotor
Two sides；
For exporting the safety monitoring mould group of stoppage protection signal, the safety monitoring Mo Zu is passed with each axial displacement respectively
The axial displacement signal of each shaft position sensor acquisition is read in sensor electrical connection；The safety monitoring mould group include or
Door A or door B and with door C；Wherein, with two input terminals of door C respectively with or door A output end and/or door B output end
Connection；Wherein or door A includes at least two input terminals, and each input terminal is respectively connected to be located at each described of the steam turbine side
The axial displacement signal of shaft position sensor acquisition；Wherein or door B includes at least two input terminals, and each input terminal connects respectively
Enter to be located at the axial displacement signal of each shaft position sensor acquisition of the steam turbine other side；
Emergency trip for controlling the halt turbines protects mould group, and the emergency trip protection mould group includes three outputs
Channel and signal processing module, three output channels are separately connected the output end with door C, three output channels
Output end is respectively connected to the signal processing module；
The signal processing module is judged according to the action signal that transmits of three output channels, and takes action signal phase
For the action signal of two same output channels as trip signal, the trip signal is transferred to the steam turbine.
2. the control system of the steam turbine according to claim 1, which is characterized in that passed including four axial displacements
Sensor.
3. the control system of the steam turbine according to claim 1, which is characterized in that all shaft position sensors
Probe uniformly set up separately in the two sides of the turbine rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820574362.5U CN208587193U (en) | 2018-04-23 | 2018-04-23 | A kind of control system of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820574362.5U CN208587193U (en) | 2018-04-23 | 2018-04-23 | A kind of control system of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208587193U true CN208587193U (en) | 2019-03-08 |
Family
ID=65533455
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820574362.5U Expired - Fee Related CN208587193U (en) | 2018-04-23 | 2018-04-23 | A kind of control system of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208587193U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894684A (en) * | 2020-06-17 | 2020-11-06 | 天津国电津能滨海热电有限公司 | Steam turbine shaft vibration protection optimization system and optimization method |
| CN113309583A (en) * | 2021-04-20 | 2021-08-27 | 华电电力科学研究院有限公司 | Method for triggering emergency trip protection of steam turbine by all faults of DEH controller |
-
2018
- 2018-04-23 CN CN201820574362.5U patent/CN208587193U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894684A (en) * | 2020-06-17 | 2020-11-06 | 天津国电津能滨海热电有限公司 | Steam turbine shaft vibration protection optimization system and optimization method |
| CN111894684B (en) * | 2020-06-17 | 2022-07-01 | 天津国能津能滨海热电有限公司 | Steam turbine shaft vibration protection optimization system and optimization method |
| CN113309583A (en) * | 2021-04-20 | 2021-08-27 | 华电电力科学研究院有限公司 | Method for triggering emergency trip protection of steam turbine by all faults of DEH controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190308 Termination date: 20190423 |