CN111025891A - Redundant control system of ATOS valve - Google Patents
Redundant control system of ATOS valve Download PDFInfo
- Publication number
- CN111025891A CN111025891A CN201911275943.4A CN201911275943A CN111025891A CN 111025891 A CN111025891 A CN 111025891A CN 201911275943 A CN201911275943 A CN 201911275943A CN 111025891 A CN111025891 A CN 111025891A
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- atos
- card
- valve
- power amplifier
- valve control
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- 208000016063 arterial thoracic outlet syndrome Diseases 0.000 title claims abstract 36
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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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
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
- G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Turbines (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
The invention discloses an ATOS valve redundancy control system, which relates to the field of industrial control systems and comprises a DCS, a valve control card, an ATOS power amplifier card and an ATS electromagnetic valve; the DCS outputs an AO current signal of 4-20mA to control the output of the valve control card; the valve control card outputs +/-20 mA current to the ATOS power amplifier card; the ATOS power amplifier card amplifies a current signal to 0-3A; the amplified current signal drives the ATOS solenoid valve; the device is characterized by further comprising a valve control card redundant circuit and an ATOS power amplifier card working signal feedback circuit. The invention can ensure that the DCS system can control the electromagnetic valve in real time, thereby further controlling the bypass system of the steam turbine, realizing manual and automatic circuit switching during circuit failure, shortening the self-recovery time of the system, improving the working efficiency and reducing the safety risk of the system.
Description
Technical Field
The invention relates to the field of industrial control systems, in particular to an ATOS valve redundancy control system.
Background
The DCS system has the advantages of complete functions, advanced technology, flexible application, reliable operation and the like, and is widely applied to the fields of thermal power and the like. In the thermal power generation system, the DCS system controls a card through a control valve to adjust an electromagnetic valve so as to further adjust a steam turbine bypass system. However, when the valve control card cannot work normally, the DCS system cannot adjust the electromagnetic valve through the valve control card, and further, steam parameters cannot be adjusted when the steam turbine is started, shut down or is shut down emergently, thereby bringing loss and potential safety hazards to enterprises.
Therefore, those skilled in the art are dedicated to develop an ATOS valve redundancy control system, which can ensure that the DCS system can effectively control the solenoid valve under the condition of valve control card failure.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to ensure that the DCS system can effectively control the solenoid valve under the condition of a failure of the valve control card.
In order to achieve the aim, the invention provides an ATOS valve redundancy control system, which comprises a DCS, a valve control card, an ATOS power amplifier card and an ATS electromagnetic valve; the DCS outputs an AO current signal of 4-20mA to control the output of the valve control card; the valve control card outputs +/-20 mA current to the ATOS power amplifier card; the ATOS power amplifier card amplifies a current signal to 0-3A; the amplified current signal drives the ATOS solenoid valve; the device also comprises a valve control card redundant circuit and an ATOS power amplifier card working signal feedback circuit.
Furthermore, the valve control card redundant circuit is positioned between the DCS and the ATS electromagnetic valve, and is provided with at least two sets of combinations of the valve control card and the ATOS power amplifier card; each set of the valve control card and the ATOS power amplifier card are combined, one end close to the valve control card is connected with the DCS, and the other end close to the ATOS power amplifier card is connected with the ATS electromagnetic valve; and the valve control card and the ATOS power amplifier card which are mutually connected are arranged in the combination of each set of the valve control card and the ATOS power amplifier card.
Furthermore, a working signal feedback circuit of the ATOS power amplifier card is also arranged in the combination of each set of the valve control card and the ATOS power amplifier card.
Furthermore, one end of the operating signal feedback circuit of the ATOS power amplifier card is connected with the ATOS power amplifier card, and the other end of the operating signal feedback circuit of the ATOS power amplifier card is connected with the valve control card; and the working signal feedback circuit of the ATOS power amplifier card feeds back the working state of the circuit where the ATOS power amplifier card is located to the valve control card.
Furthermore, a servo output switching plate is arranged between the combination of each set of the valve control card and the ATOS power amplifier card and the ATS electromagnetic valve; one end of the servo output switching board is connected with the ATOS power amplifier card, and the other end of the servo output switching board is connected with the ATS electromagnetic valve.
Furthermore, a direct signal connection is also arranged between the valve control card and the servo output switching plate; when the circuit where the valve control card is located has a fault, the valve control card sends a signal for switching the circuit to the servo output switching board.
Further, the failure comprises a CPU of the valve control card being bad.
Further, the fault further comprises an ADC bad and a DAC bad of the valve control card.
Further, the fault also includes that the ATOS power amplifier is damaged.
Further, the valve control card sends a signal of a switching circuit to the servo output switching board in a manual or automatic mode.
The ATOS valve redundancy control system provided by the invention has the following beneficial effects:
1. the valve control card in the control scheme of the invention can monitor the working state of the circuit where the power amplifier card is positioned in real time, and when the valve control card or the power amplifier card can not work, the valve control card can send a logic switching signal to the servo output switching board, so that the DCS system can be ensured to control the electromagnetic valve in real time, and further the steam turbine bypass system can be controlled.
2. The control scheme of the invention can realize manual and automatic circuit switching during circuit failure, shorten the time of system self-recovery, improve the working efficiency and reduce the safety risk of the system.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of an ATOS valve control scheme in accordance with a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of an ATOS valve control modification of a preferred embodiment of the present invention.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
As shown in FIG. 1, the schematic diagram of the original scheme of the ATOS valve control is shown. In the original scheme, the DCS system directly and indirectly controls the electromagnetic valve through the valve control card, and the power amplifier card cannot timely acquire the working state of the power amplifier card because the power amplifier card does not output a feedback signal to the valve control card or the DCS system. The detailed working principle of the ATOS valve control original scheme is as follows:
1) the DCS outputs an AO current signal of 4-20mA to control the output of the valve control card;
2) the valve control card outputs +/-20 mA current to the ATOS power amplifier card, and the power amplifier card amplifies a current signal to 0-3A;
3) and the current amplified by the power amplifier card can drive the ATOS electromagnetic valve so as to control the steam turbine bypass system.
As shown in fig. 2, the schematic diagram of the improved scheme of the ato valve control further includes a valve control card redundancy circuit and an ato power amplifier card working signal feedback circuit. The redundant circuit of the valve control card is positioned between the DCS and the ATS electromagnetic valve, and is provided with at least two combinations of the valve control card and the ATOS power amplifier card, such as the valve control card A, the ATOS power amplifier card A, the valve control card B and the ATOS power amplifier card B shown in the attached figure 2.
Each set of valve control card and ATOS power amplifier card are combined, one end close to the valve control card is connected with the DCS, and the other end close to the ATOS power amplifier card is connected with the ATS electromagnetic valve; and the valve control card and the ATOS power amplifier card which are mutually connected are arranged inside the combination of each set of valve control card and the ATOS power amplifier card.
And a working signal feedback circuit of the ATOS power amplifier card is also arranged in the combination of each set of valve control card and the ATOS power amplifier card.
One end of the working signal feedback circuit of the ATOS power amplifier card is connected with the ATOS power amplifier card, and the other end of the working signal feedback circuit of the ATOS power amplifier card is connected with the valve control card; and the working signal feedback circuit of the ATOS power amplifier card feeds back the working state of the circuit where the ATOS power amplifier card is positioned to the valve control card.
A servo output switching plate is also arranged between the combination of each set of valve control card and the ATOS power amplifier card and the ATS electromagnetic valve; one end of the servo output switching board is connected with the ATOS power amplifier card, and the other end of the servo output switching board is connected with the ATS electromagnetic valve.
A direct signal connection is also arranged between the valve control card and the servo output switching board; when the circuit where the valve control card is located has a fault, the valve control card can send a signal for switching the circuit to the servo output switching board.
The faults of the circuit where the valve control card is located include that a CPU (central processing unit) of the valve control card is bad, an ADC (analog to digital converter) is bad, a DAC (digital to analog converter) is bad, and an ATOS (advanced telecom operating system) power amplifier is bad.
The valve control card sends a signal of a switching circuit to the servo output switching board in a manual or automatic mode.
When the circuit of the valve control card A has a fault, the valve control card A sends a switching signal to the servo output switching board, the DCS system is automatically switched to the circuit of the valve control card B, and the DCS system can be switched to the circuit of the valve control card B through a manual switching signal, so that the normal and safe operation of the thermal power system is guaranteed. During the manual switching signal, the engineer may input a manual switching DI0 signal to the valve control card to control the valve control card a to send a switching signal to the servo output switching board, so as to switch the system to the circuit where the valve control card B is located.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. An ATOS valve redundancy control system comprises a DCS, a valve control card, an ATOS power amplifier card and an ATS electromagnetic valve; the DCS outputs an AO current signal of 4-20mA to control the output of the valve control card; the valve control card outputs +/-20 mA current to the ATOS power amplifier card; the ATOS power amplifier card amplifies a current signal to 0-3A; the amplified current signal drives the ATOS solenoid valve;
the device is characterized by further comprising a valve control card redundant circuit and an ATOS power amplifier card working signal feedback circuit.
2. The ATOS valve redundancy control system of claim 1, wherein said valve control card redundancy circuit is located between said DCS and said ATS solenoid valve, providing a combination of at least two sets of said valve control card and said ATOS power amplifier card; each set of the valve control card and the ATOS power amplifier card are combined, one end close to the valve control card is connected with the DCS, and the other end close to the ATOS power amplifier card is connected with the ATS electromagnetic valve; and the valve control card and the ATOS power amplifier card which are mutually connected are arranged in the combination of each set of the valve control card and the ATOS power amplifier card.
3. The ATOS valve redundancy control system according to claim 2, wherein a feedback circuit of said ATOS power amplifier card operating signal is further provided inside a combination of said each set of said valve control card and said ATOS power amplifier card.
4. The ATOS valve redundancy control system of claim 3, wherein one end of said ATOS power amplifier card working signal feedback circuit is connected with said ATOS power amplifier card, and the other end is connected with said valve control card; and the working signal feedback circuit of the ATOS power amplifier card feeds back the working state of the circuit where the ATOS power amplifier card is located to the valve control card.
5. The ATOS valve redundancy control system according to claim 4, characterized in that a servo output switching board is further provided between said ATS solenoid valve and a combination of each set of said valve control card and said ATOS power amplifier card; one end of the servo output switching board is connected with the ATOS power amplifier card, and the other end of the servo output switching board is connected with the ATS electromagnetic valve.
6. The ATOS valve redundancy control system of claim 5, wherein a direct signal connection is further provided between said valve control card and said servo output switching plate; when the circuit where the valve control card is located has a fault, the valve control card sends a signal for switching the circuit to the servo output switching board.
7. The ATOS valve redundancy control system of claim 6, wherein said failure comprises a CPU failure of said valve control card.
8. The ATOS valve redundancy control system of claim 6, wherein said failure further comprises an ADC bad and a DAC bad of said valve control card.
9. The ATOS valve redundancy control system of claim 6, wherein said failure further comprises said ATOS power amplifier stuck.
10. The ATOS valve redundancy control system of claim 6, wherein said valve control card signals a switching circuit to said servo output switcher panel either manually or automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911275943.4A CN111025891A (en) | 2019-12-12 | 2019-12-12 | Redundant control system of ATOS valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911275943.4A CN111025891A (en) | 2019-12-12 | 2019-12-12 | Redundant control system of ATOS valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111025891A true CN111025891A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911275943.4A Pending CN111025891A (en) | 2019-12-12 | 2019-12-12 | Redundant control system of ATOS valve |
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| Country | Link |
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| CN (1) | CN111025891A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357181A (en) * | 2021-05-08 | 2021-09-07 | 上海梅山钢铁股份有限公司 | Fault self-switching redundancy control device for electric air door of fan |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904650A (en) * | 2014-04-14 | 2014-07-02 | 重庆浦仁达科技有限公司 | Digital-analog combined electrohydraulic control system |
-
2019
- 2019-12-12 CN CN201911275943.4A patent/CN111025891A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904650A (en) * | 2014-04-14 | 2014-07-02 | 重庆浦仁达科技有限公司 | Digital-analog combined electrohydraulic control system |
Non-Patent Citations (3)
| Title |
|---|
| 于再兴等: "基于C8041F的功放监测与显示系统设计" * |
| 任登敏等: "镇江电厂#4机组DEH伺服系统技术优化" * |
| 尚洪奎等: "DEH系统主汽门控制冗余改造" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357181A (en) * | 2021-05-08 | 2021-09-07 | 上海梅山钢铁股份有限公司 | Fault self-switching redundancy control device for electric air door of fan |
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Application publication date: 20200417 |