CN112540547A - Steam turbine valve simulation control system - Google Patents
Steam turbine valve simulation control system Download PDFInfo
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- CN112540547A CN112540547A CN202011269766.1A CN202011269766A CN112540547A CN 112540547 A CN112540547 A CN 112540547A CN 202011269766 A CN202011269766 A CN 202011269766A CN 112540547 A CN112540547 A CN 112540547A
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- steam turbine
- valve opening
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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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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- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The application relates to a steam turbine valve analog control system, and a control device is used for sending a steam turbine valve opening control signal. The simulation device is used for feeding back the first valve opening information to the control device according to the valve opening control signal and sending the second valve opening information. The display device is used for receiving the second valve opening information and displaying the opening state of the turbine valve according to the second valve opening information. The control device sends a steam turbine valve opening control signal to the simulation device, so that the simulation device simulates the opening of the steam turbine valve according to the steam turbine valve opening control signal, and feeds back the first valve opening information to the control device, so that the control device accurately adjusts the opening of the steam turbine valve. The simulation device can accurately simulate the opening condition of the steam turbine valve. Therefore, under the condition that the valve of the steam turbine is not started, all parts in the control device can be tested and verified, and the working efficiency is improved.
Description
Technical Field
The application relates to the field of steam turbines, in particular to a steam turbine valve simulation control system.
Background
The steam turbine main steam valve control system is a system for controlling the rotating speed and the power of the generator set by controlling the opening of a steam turbine steam inlet valve. The steam turbine main steam valve control system is a closed-loop control system, and an execution mechanism, such as a steam turbine main steam valve, needs to be connected and switched, so that instrument control equipment of the steam turbine main steam valve control system can enter a normal operation state. A main steam valve positioner of the steam turbine adopts an electro-hydraulic servo valve, and the operation of the main steam valve positioner needs a set of complex power oil system support. During the overhaul period of the power plant unit, the executing mechanism is in an unavailable state due to the maintenance of the mechanical equipment body in most of time, so that the instrument control equipment is also in a fault state, and the test and verification cannot be carried out, thereby influencing the working efficiency.
Disclosure of Invention
In view of the above, there is a need to provide a steam turbine valve simulation control system.
A steam turbine valve analog control system comprising:
the control device is used for sending a steam turbine valve opening control signal;
the simulation device is used for feeding back first valve opening information to the control device according to the valve opening control signal and sending second valve opening information; and
and the display device is used for receiving the second valve opening information and displaying the opening state of the turbine valve according to the second valve opening information.
In one embodiment, the control device includes a plurality of valve control modules, the simulation device includes a plurality of valve opening degree simulation devices, the valve control modules correspond to the valve opening degree simulation devices one to one, each valve control module is configured to send a valve opening degree control signal to one valve opening degree simulation device, and each valve opening degree simulation device feeds back the first valve opening degree information to the corresponding inventive control module and sends the second valve opening degree information to the display device.
In one embodiment, the simulation apparatus further comprises:
the sampling circuit is connected with the valve control module and used for receiving the opening control signal of the steam turbine valve; and
and the processing circuit is connected with the sampling circuit and used for simulating the change of the opening of the steam turbine valve according to the opening control signal of the steam turbine valve, feeding back the first valve opening information to the control device and sending the second valve opening information to the display device.
In one embodiment, the simulation apparatus further comprises:
an analog-to-digital conversion circuit connected between the sampling circuit and the processing circuit, an
And the digital-to-analog conversion circuit is connected between the processing circuit and the display device, and is also connected between the processing circuit and the valve control module.
In one embodiment, the display device displays the opening state of the turbine valve through a bar graph.
In one embodiment, the first valve opening information comprises a linear variable differential voltage signal.
In one embodiment, the control device comprises an upper computer and a lower computer, wherein the upper computer is used for inputting control information, and the lower computer is used for sending a control signal of the opening degree of the valve of the steam turbine.
In one embodiment, the simulation device further comprises a housing, inside which the cooling device is arranged.
In one embodiment, the housing is provided with an output port, and the simulation device feeds back the first valve opening information to the control device through the output port.
In one embodiment, the housing is provided with a communication interface, and the simulation device sends the second valve opening information through the communication interface.
The embodiment of the application provides steam turbine valve analog control system, controlling means is used for sending steam turbine valve opening control signal. The simulation device is used for feeding back first valve opening information to the control device according to the valve opening control signal and sending second valve opening information. And the display device is used for receiving the second valve opening information and displaying the opening state of the turbine valve according to the second valve opening information. The control device sends the steam turbine valve opening control signal to the simulation device, so that the simulation device simulates the opening of the steam turbine valve according to the steam turbine valve opening control signal, and feeds back the first valve opening information to the control device, so that the control device accurately adjusts the opening of the steam turbine valve. The simulation device can accurately simulate the opening condition of the steam turbine valve, so that the steam turbine valve simulation control system can simulate the execution condition of each component in the control device in operation. Therefore, under the condition that the steam turbine valve is not required to be started, all parts in the control device can be tested and verified, so that the working process is simplified, and the working efficiency is improved.
Drawings
FIG. 1 is a block diagram of a steam turbine valve simulation control system provided in an embodiment of the present application;
FIG. 2 is a block diagram of a steam turbine valve simulation control system according to another embodiment of the present application;
FIG. 3 is a block diagram of a steam turbine valve simulation control system according to another embodiment of the present application.
Description of reference numerals:
the system comprises a steam turbine valve simulation control system 10, a control device 100, a valve control module 110, an upper computer 120, a lower computer 130, a cooling device 140, a simulation device 200, a valve opening simulation device 210, a sampling circuit 220, a processing circuit 230, an analog-to-digital conversion circuit 240, a digital-to-analog conversion circuit 250, a power supply module 260 and a display device 300.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the steam turbine valve simulation control system of the present application is further described in detail by the following embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, an exemplary embodiment of the present application provides a steam turbine valve simulation control system 10. The steam turbine valve simulation control system 10 includes a control device 100, a simulation device 200, and a display device 300. The control device 100 is configured to send a turbine valve opening control signal. The simulation apparatus 200 is configured to feed back first valve opening information to the control apparatus 100 according to the valve opening control signal, and send second valve opening information. The display device 300 is used for receiving the second valve opening information. The display device 300 is used for displaying the opening state of the turbine valve according to the second valve opening information.
The control device 100 may be configured to input opening information of the turbine valve, and control and send a turbine valve opening control signal to the simulation device 200 according to the opening information. The simulation apparatus 200 may be configured to simulate an opening change of the turbine valve under the control of the turbine valve opening control signal in a real working scene, and may feed back the first valve opening information to the control apparatus 100 in real time. The control device 100 may transmit real-time adjustment information according to the first valve opening information to precisely control the opening of the turbine valve simulated in the simulation device 200. It is understood that the simulation apparatus 200 and the control apparatus 100 form a feedback loop. The feedback form is consistent with the feedback form of the steam turbine valve, so that the real scene of the control of the steam turbine valve can be completely restored. The steam turbine valve simulation control system 10 can simulate the execution condition of each component in the control device 100 in operation, so that each component in the control device 100 can be tested and verified without starting the steam turbine valve, thereby simplifying the work flow and improving the work efficiency. The valve opening control signal may be a high frequency current signal.
It is understood that the control device 100 may have a human-computer interaction function for the purpose of manually controlling the turbine valve. The simulation apparatus 200 may have a circuit board integrated therein. A processor may be disposed in the circuit board. And running a model established for the turbine valve through the processor, and then outputting the first valve opening information. The display device 300 may be an OLED display, a liquid crystal display, or the like. The opening condition and the working state of the steam turbine valve to be simulated can be displayed through the display device 300. The display device 300 may also display the working conditions of each component in the control device 100 for monitoring, so that the working conditions of the control device 100 can be tested and verified by a worker.
In the steam turbine valve simulation control system 10 provided in the embodiment of the present application, the control device 100 is configured to send a steam turbine valve opening degree control signal. The simulation apparatus 200 is configured to feed back first valve opening information to the control apparatus 100 according to the valve opening control signal, and send second valve opening information. The display device 300 is configured to receive the second valve opening information and display an opening state of the turbine valve according to the second valve opening information. The control device 100 sends the steam turbine valve opening degree control signal to the simulation device 200, so that the simulation device 200 simulates the opening degree of the steam turbine valve according to the steam turbine valve opening degree control signal, and feeds back the first valve opening degree information to the control device 100, so that the control device 100 accurately adjusts the steam turbine valve opening degree. The simulation apparatus 200 can accurately simulate the opening condition of the turbine valve, so that the turbine valve simulation control system 10 can simulate the performance of each component in the control apparatus 100 in operation. Therefore, under the condition that the steam turbine valve is not required to be started, all parts in the control device 100 can be tested and verified, so that the working process is simplified, and the working efficiency is improved.
Referring to fig. 2, in one embodiment, the control device 100 includes a plurality of valve control modules 110. The simulation apparatus 200 includes a plurality of valve opening simulation apparatuses 210. The valve control modules 110 correspond to the valve opening simulation devices 210 one to one. Each of the valve control modules 110 is configured to send one of the valve opening control signals to one of the valve opening simulation apparatuses 210. Each of the valve opening simulation devices 210 feeds back the first valve opening information to the corresponding inventive control module, and sends the second valve opening information to the display device 300.
The number of the valve control module 110 and the valve opening simulator 210 may be controlled according to the number of the turbine valves to be simulated. One of the valve control modules 110 may control one of the valve opening simulation devices 210. Therefore, different control parameters can be input to different valve control modules 110, so as to perform analog control on different turbine valves. It is to be appreciated that the valve opening simulator 210 may be a virtual device formed from the steam turbine valve modeling being simulated. The valve opening degree simulation devices 210 and the valve control modules 110, which correspond to each other, may be connected to form a closed-loop feedback, so that the valve control modules 110 precisely control the steam turbine valves to be simulated. Each of the valve opening simulation devices 210 transmits the second valve opening information to the display device 300. The second valve opening information may include an opening state and an operating state of the steam turbine valve being simulated. The display device 300 can display the opening state and the operation state of the steam turbine valve to be simulated.
The I/O signal communication measurement or output accuracy between the valve opening simulator 210 and the valve control module 110 does not exceed 5% at most, and in one embodiment, the accuracy may be 1%. The valve opening simulator 210 may include a single chip microcomputer. The program in the single chip microcomputer outputs a signal according to the high-frequency current of the valve opening simulation device 210, and outputs the first valve opening information to the valve control module 110 in real time according to a data curve transformation diagram and dynamic characteristics. When the high-frequency current output signal is lost, the valve opening simulation device 210 can simulate the situation of safe shutdown after power failure, and the valve opening feedback signal can return to 0% within about 50 ms.
The single chip in the valve opening simulator 210 may also have a serial communication function. The valve opening simulation device 210 may upload the first valve opening information and the health status information of the valve opening simulation device 210 to the control device and the display device through the serial port communication function. So that the working state of the valve opening simulator 210 can be grasped by the operator in real time.
In one embodiment, the control device 100 may further include a server. The control device 100 may traverse each of the valve opening simulation devices 210 through the server. And if the communication is failed when the signal is taken, setting the health state as the failure. The display device 300 may be provided with a client. The client program communicates with the server program to display the health status on the status monitoring interface of the display device 300. The normal state of the valve opening simulator 210 is represented by green. The failure state of the valve opening simulator 210 is represented by red. The display device 300 provides a "return signal real-time monitoring interface" function. And the server converts and outputs the corresponding 4-20mA current value according to the current valve opening. The signal of which valve is output is determined by the 'output of which valve opening degree' on the server interface.
Referring to fig. 3, in one embodiment, the simulation apparatus 200 further includes a sampling circuit 220 and a processing circuit 230. The sampling circuit 220 is coupled to the valve control module 110. The sampling circuit 220 is configured to receive the turbine valve opening control signal. The processing circuit 230 is connected to the sampling circuit 220. The processing circuit 230 is configured to simulate a change of the turbine valve opening according to the turbine valve opening control signal, feed back the first valve opening information to the control device 100, and send the second valve opening information to the display device 300. It is understood that the sampling circuit 220 may be a voltage sampling circuit 220, and may also be a current sampling circuit 220. The processing circuit 230 may include an arithmetic unit such as a single chip microcomputer and a Read Only Memory (ROM). A model of the turbine valve may be run at the processing circuitry 230. The processing circuit 230 feeds back the simulated opening state of the turbine valve to the control device 100, so that the control device 100 feeds back the opening state in real time. The processing circuit 230 may also send second valve opening information to the display device 300 to cause the display device 300 to display the opening and operating state of the steam turbine valve being simulated. In one embodiment, the processing circuit 230 may communicate with the display device 300 through RS 485.
In one embodiment, the emulation device 200 further includes an analog-to-digital conversion circuit 240 and a digital-to-analog conversion circuit 250. The analog-to-digital conversion circuit 240 is connected between the sampling circuit 220 and the processing circuit 230. The digital-to-analog conversion circuit 250. Is connected between the processing circuit 230 and the display device 300. The digital to analog conversion circuit 250 is also coupled between the processing circuit 230 and the valve control module 110. The sampling circuit 220, the valve control module 110 may be configured to process analog signals, and the processing circuit 230 may be configured to process digital signals.
In one embodiment, an electro-hydraulic servo valve simulator visualization software may be disposed in the display device 300, and the display device 300 displays the opening state of the turbine valve through a bar graph. It will be appreciated that the filling ratio of the histogram may correspond to the opening of the turbine valve. The histogram may be filled when the opening of the turbine valve being simulated is 100%. The opening state of the turbine valve may also be displayed by a pie chart, a graph, or the like. The processing circuit 230 can communicate with the electro-hydraulic servo valve simulator through RS485 by 4-20mA current signals. The valve module can receive a high-frequency current control signal and feed back a 5000HZ alternating voltage signal (valve position signal). The current and voltage correspondence of the valve module may be set by modifying a ROM data table. The electro-hydraulic servo valve simulator software can be installed on a personal computer based on a Microsoft Windows XP operating system and is communicated with the valve opening degree simulation device 210 through an RS485/232 serial port, and a software man-machine interface can display 14 main steam turbine valve current driving signals and valve opening degree signals in real time and display the working state of the valve opening degree simulation device 210, so that visual management of maintenance personnel is facilitated.
In one embodiment, the first valve opening information comprises a linear variable differential voltage signal. Linear Variable Differential (LVDT) voltage signals have the advantage of high accuracy. The digital-to-analog conversion module can transmit the analog signal to the analog-to-digital conversion circuit 240 through the 4-20mA valve position signal feedback unit, and the digital signal is input to the display device 300 for processing and displaying.
In one embodiment, the control device 100 includes an upper computer 120 and a lower computer 130. The upper computer 120 is used for inputting control information. And the lower computer 130 is used for sending a steam turbine valve opening control signal. That is, the upper computer 120 may be an input device such as a computer. Control instructions can be input through the upper computer 120. The upper computer 120 sends the control instruction to the lower computer 130. And the lower computer 130 sends the opening control signal of the steam turbine valve according to the control instruction. The lower computer 130 can directly control the equipment to obtain the equipment condition. Different communication protocols can be adopted for the communication between the upper computer 120 and the lower computer 130. The communication protocol may include serial communication of RS232 or RS 485.
In one embodiment, the animation device 200 further comprises a housing. A cooling device 140 is provided within the housing. Which may constitute the main body of the simulation apparatus 200. The housing may be of a cubic configuration. The housing may be provided with an operating face. The operation surface can be provided with various interfaces and operation buttons. The cooling device 140 may be used to cool the valve opening simulator 210. It is understood that the valve opening simulator 210 may be a circuit board. The circuit board can emit more heat when working. The circuit board can be cooled by the cooling device 140. In one embodiment, the housing may be 65CM x 40 x 21CM in size, and the housing may be provided with a handle for portability. The operating surface of the shell can be also provided with a cover body. When the simulation apparatus 200 is used, the cover may be opened. When the simulation apparatus 200 is not to be used, the cover may be closed to protect the ports and the operation buttons on the operation panel. It will be appreciated that the housing may be made of a non-conductive insulating material.
In one embodiment, the housing is provided with an output port. The simulation apparatus 200 feeds back the first valve opening information to the control apparatus 100 through the output port. The housing may also be provided with a voltage plug. The power plug may be a 220VAC plug. The 220VAC plug may provide power to the cooling device 140 and the power module 260 in the housing. The power module may be configured to plug the 220VAC plug. The power supply module 260 is further connected to the sampling circuit 220, the analog-to-digital conversion circuit 240, and the processing circuit 230, respectively. The power supply module 260 is configured to supply power to the sampling circuit 220, the analog-to-digital conversion circuit 240, and the processing circuit 230, respectively.
In one embodiment, the housing is provided with a communication interface. The simulation apparatus 200 sends the second valve opening information through the communication interface. The computer can be connected with the external computer through the communication interface. And outputs a digital signal of the opening degree of the turbine valve for display on the display device 300.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present patent. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A steam turbine valve analog control system, comprising:
the control device is used for sending a steam turbine valve opening control signal;
the simulation device is used for feeding back first valve opening information to the control device according to the valve opening control signal and sending second valve opening information; and
and the display device is used for receiving the second valve opening information and displaying the opening state of the turbine valve according to the second valve opening information.
2. The steam turbine valve simulation control system according to claim 1, wherein the control device comprises a plurality of valve control modules, the simulation device comprises a plurality of valve opening simulation devices, the valve control modules are in one-to-one correspondence with the valve opening simulation devices, each valve control module is configured to send a valve opening control signal to one of the valve opening simulation devices, and each valve opening simulation device feeds back the first valve opening information to the corresponding inventive control module and sends the second valve opening information to the display device.
3. The steam turbine valve analog control system of claim 2 wherein said emulation means further comprises:
the sampling circuit is connected with the valve control module and used for receiving the opening control signal of the steam turbine valve; and
and the processing circuit is connected with the sampling circuit and used for simulating the change of the opening of the steam turbine valve according to the opening control signal of the steam turbine valve, feeding back the first valve opening information to the control device and sending the second valve opening information to the display device.
4. The steam turbine valve analog control system of claim 3 wherein said emulation means further comprises:
an analog-to-digital conversion circuit connected between the sampling circuit and the processing circuit, an
And the digital-to-analog conversion circuit is connected between the processing circuit and the display device, and is also connected between the processing circuit and the valve control module.
5. The steam turbine valve simulation control system according to claim 1, wherein the display means displays the opening state of the steam turbine valve by a bar graph.
6. The steam turbine valve analog control system of claim 1 wherein said first valve opening information comprises a linear variable differential voltage signal.
7. The steam turbine valve simulation control system according to claim 1, wherein the control device comprises an upper computer for inputting control information and a lower computer for sending a steam turbine valve opening control signal.
8. The steam turbine valve analog control system of claim 1 wherein said emulation device further comprises a housing having a cooling device disposed therein.
9. The steam turbine valve analog control system of claim 8 wherein said housing is provided with an output port, said emulation device feeding back first valve opening information to said control device through said output port.
10. The steam turbine valve analog control system of claim 9 wherein said housing is provided with a communication interface, said emulation device sending second valve opening information through said communication interface.
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| CN202011269766.1A CN112540547B (en) | 2020-11-13 | 2020-11-13 | Steam turbine valve simulation control system |
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| CN202011269766.1A CN112540547B (en) | 2020-11-13 | 2020-11-13 | Steam turbine valve simulation control system |
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Cited By (1)
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| CN114623282A (en) * | 2021-12-01 | 2022-06-14 | 哈尔滨圣昌科技开发有限公司 | Opening visualization system and method for remotely controlling valve |
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| CN112540547B (en) | 2023-07-04 |
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