CN112859786A - Automatic resetting control system and method for PI card of thermal power plant - Google Patents
Automatic resetting control system and method for PI card of thermal power plant Download PDFInfo
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- CN112859786A CN112859786A CN202110075841.9A CN202110075841A CN112859786A CN 112859786 A CN112859786 A CN 112859786A CN 202110075841 A CN202110075841 A CN 202110075841A CN 112859786 A CN112859786 A CN 112859786A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 claims description 22
- 238000012905 input function Methods 0.000 claims description 9
- 238000012625 in-situ measurement Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 6
- 239000003245 coal Substances 0.000 description 5
- 238000004886 process control Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process 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
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/33—Director till display
- G05B2219/33273—DCS distributed, decentralised controlsystem, multiprocessor
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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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- Automation & Control Theory (AREA)
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Abstract
A thermal power plant PI card automatic reset control system and method, the system includes the page quotes the function block, inputs the function block, collects the pulse signal and PI card function block processed, PI card output display function block, high limit compares the function block, pulse function block, up-down counter function block and up-down counter function block output display function block; the invention provides a novel PI card automatic reset control system by using the existing DCS functional block, automatically resets the PI card after the accumulated numerical value is increased to a certain value, simultaneously ensures the calculation of the accumulated numerical value to be correct through logic calculation, has simple picture display and is convenient for operators to observe and record.
Description
Technical Field
The invention relates to the technical field of automatic control of a thermal power plant, in particular to a system and a method for controlling automatic resetting of a PI card of the thermal power plant.
Background
The modern high-power thermal power generating unit basically adopts a DCS (distributed Control System) Control system, namely a so-called distributed Control system.
The hardware and software functions of the DCS control system are continuously improved and strengthened, and the DCS control system can be decomposed into three major parts, namely a process control station, an operation station and a communication system. The process control station is the interface between the control process and the production process, and the process level mainly comprises the process control station, I/O equipment and field instruments, and is the main implementation part of the system control function.
The I/O equipment collects analog quantity or digital quantity signals from the site, converts the signals for processing by the main controller, or outputs the signals processed by the main controller to the site. The I/O devices include Analog Input (AI) cards, Analog Output (AO) cards, switching input (DI) cards, switching output (DO) cards, and Pulse Input (PI) cards, etc.
The basic function of the pulse quantity PI card is to convert the input pulse quantity into analog quantity which is corresponding to the input pulse quantity and can be recognized by a computer for logic calculation or picture display. The PI card collects the collected pulse signals to carry out accumulated output, and the output value can obtain the accumulated numerical values of the coal feeding amount and the like through calculation. As the accumulation time increases, the accumulated value increases, and the displayed value is inconvenient for operators to observe and record.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a PI card automatic reset control system and a PI card automatic reset control method for a thermal power plant, wherein the PI card automatic reset control system is provided by using the existing DCS functional block, when the accumulated value is increased to a certain value, the PI card is automatically reset, and meanwhile, the accumulated value is accurately calculated through logic calculation, the picture display is simple, and the PI card automatic reset control system is convenient for operators to observe and record.
In order to achieve the purpose, the invention adopts the following technical scheme:
a thermal power plant PI card automatic reset control system comprises an inter-page reference function block 101, an input function block 102, a PI card function block 103 for collecting pulse signals and processing, a PI card output display function block 201, a high limit comparison function block 301, a pulse function block 302, an up-down counter function block 303 and an up-down counter function block output display function block 401;
the inter-page reference function block 101 is connected to a reset terminal of a PI card function block 103 for collecting and processing pulse signals, the input function block 102 is connected to an input terminal of the PI card function block 103 for collecting and processing pulse signals, one path of an output terminal of the PI card function block 103 for collecting and processing pulse signals is connected to an input terminal of a PI card output display function block 201, the other path is connected to an input terminal of a high limit comparison function block 301, an output terminal of the high limit comparison function block 301 is connected to the pulse function block 302, an output terminal of the pulse function block 302 is connected to an increment trigger pin of an up-down counter function block 303 and the inter-page reference function block 101, and an output terminal of the up-down counter function block 303 is connected to an up-down counter function block output.
The invention discloses a control method of a PI card automatic reset control system of a thermal power plant, which comprises the following steps:
1) the in-situ measurement pulse signals are accessed into a PI card function block 103 for acquiring and processing pulse signals through an input function block 102, the PI card function block 103 for acquiring and processing pulse signals is reset through an inter-page reference function block 101 by adopting PI card automatic reset signals, the output of the PI card function block 103 for acquiring and processing pulse signals after reset is 0, namely the PI card is counted again after reset is completed; the PI card output display function block 201 is used to display the remainder of the picture;
2) the output of the PI card function block 103 for collecting and processing the pulse signal is accessed to the high limit comparison function block 301, when the output of the PI card function block 103 for collecting and processing the pulse signal exceeds the high limit set value of the high limit comparison function block 301, the output of the high limit comparison function block 301 is 1, the output end of the trigger pulse function block 302 is 1, the up-down counter function block 303 counts and increases 1 to output to the up-down counter function block output display function block 401, and meanwhile, the PI card automatic reset signal of the function block 101 is quoted between pages is 1; the up-down counter function block outputs a multiple of the display function block 401 for displaying the picture.
Compared with the prior art, the invention has the following advantages:
1. on the basis of the basic logic of the existing PI card, the automatic reset logic is added to the PI card when the output value of the PI card exceeds a certain value by using the existing DCS functional block, so that the condition that the counting function is lost when the counting of the PI card exceeds the high limit can be avoided, and the automatic reset times are recorded. The automatic reset times are used as the multiples of picture display, the PI card outputs the remainder of the picture display, the picture display is simple, and the operation personnel can observe and record the picture conveniently.
2. The invention divides the original PI card output into multiple and remainder display by adding logic, and obtains the total value of the PI card output by calculation in the way of multiple-high limit comparison function block 301 high limit set value + remainder.
Drawings
FIG. 1 is a block diagram of the system connections of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the PI card automatic reset control system of the thermal power plant according to the present invention includes an inter-page reference function block 101, an input function block 102, a PI card function block 103 that collects and processes a pulse signal, a PI card output display function block 201, an upper limit comparison function block 301, a pulse function block 302, an up-down counter function block 303, and an up-down counter function block output display function block 401.
The inter-page reference function block 101 is connected to a reset end of a PI card function block 103 for collecting and processing pulse signals, the input function block 102 is connected to an input end of the PI card function block 103 for collecting and processing pulse signals, one path of an output end of the PI card function block 103 for collecting and processing pulse signals is connected to an input end of a PI card output display function block 201, the other path is connected to an input end of a high limit comparison function block 301, an output end of the high limit comparison function block 301 is connected to the pulse function block 302, an output end of the pulse function block 302 is connected to an increment trigger pin of an up-down counter function block 303 and the inter-page reference function block 101, and an output end of the up-down counter function block 303 is connected to an up-down counter function block output.
As shown in fig. 1, the control method of the automatic PI card reset control system of the thermal power plant of the present invention is as follows:
1) the in-situ measurement pulse signals are accessed into a PI card function block 103 for collecting and processing the pulse signals through an input function block 102, the PI card function block 103 for collecting and processing the pulse signals is reset through an inter-page reference function block 101 by adopting PI card automatic reset signals, the output of the PI card function block 103 for collecting and processing the pulse signals after reset is 0, namely the PI card is counted again after reset is completed. The PI card output display function block 201 is used to display the remainder of the picture.
2) The output of the PI card function block 103 for collecting and processing the pulse signal is accessed to the high limit comparison function block 301, when the output of the PI card function block 103 for collecting and processing the pulse signal exceeds the high limit set value of the high limit comparison function block 301, the output of the high limit comparison function block 301 is 1, the output of the trigger pulse function block 302 is 1, the up-down counter function block 303 counts and increases 1 and outputs to the up-down counter function block output display function block 401, and meanwhile, the PI card automatic reset signal of the function block 101 is quoted between pages is 1. The up-down counter function block outputs a multiple of the display function block 401 for displaying the picture.
Examples
In a 660MW unit of a certain power plant, the accumulated coal amount of a coal feeder is collected through a PI card, and the PI card is required to be reset once when the coal amount exceeds 100000 t. The control logic sets the high limit set value of the high limit comparison function block 301 to be 100000, when the coal feeding amount exceeds 100000t, the PI is reset once, the output of the up-down counter function block 303 is increased by 1 and is used as the multiple of the screen display, and the output 201 of the PI card 103 is used as the remainder of the screen display.
The DCS platform for realizing the control logic of the embodiment adopts a symphony Plus system of ABB company.
Claims (2)
1. The utility model provides a thermal power factory PI card automatic re-setting control system which characterized in that: the device comprises an inter-page reference function block (101), an input function block (102), a PI card function block (103) for collecting and processing pulse signals, a PI card output display function block (201), a high limit comparison function block (301), a pulse function block (302), an up-down counter function block (303) and an up-down counter function block output display function block (401);
the inter-page reference function block (101) is connected with a reset end of a PI card function block (103) which collects and processes pulse signals, an input function block (102) is connected with an input end of the PI card function block (103) which collects and processes pulse signals, one path of an output end of the PI card function block (103) which collects and processes pulse signals is connected with an input end of a PI card output display function block (201), the other path of the output end of the PI card function block is connected with an input end of a high limit comparison function block (301), an output end of the high limit comparison function block (301) is connected with a pulse function block (302), an output end of the pulse function block (302) is connected with an up-trigger pin of an up-down counter function block (303) and the inter-page reference function block (101), and an output end of the up-down counter function block (302) is connected with an.
2. The control method of the automatic PI card reset control system of the thermal power plant as claimed in claim 1, is characterized by comprising the following steps:
1) the in-situ measurement pulse signals are accessed to a PI card function block (103) for collecting and processing the pulse signals through an input function block (102), the PI card function block (103) for collecting and processing the pulse signals is reset through an inter-page reference function block (101) by adopting PI card automatic reset signals, the output of the PI card function block (103) for collecting and processing the pulse signals after reset is 0, namely the PI card is counted again after reset is completed; the PI card outputs a remainder of a display function block (201) for displaying a picture;
2) the output of a PI card functional block (103) which collects and processes a pulse signal is accessed to a high limit comparison functional block (301), when the output of the PI card functional block (103) which collects and processes the pulse signal exceeds a high limit set value of the high limit comparison functional block (301), the output of the high limit comparison functional block (301) is 1, the output end of a trigger pulse functional block (302) is 1, a count increasing 1 of an up-down counter functional block (303) is output to an up-down counter functional block output display functional block (401), and meanwhile, the PI card automatic reset signal of a page reference functional block (101) is 1; the up-down counter function outputs a multiple of the display function (401) for displaying the picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110075841.9A CN112859786A (en) | 2021-01-20 | 2021-01-20 | Automatic resetting control system and method for PI card of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110075841.9A CN112859786A (en) | 2021-01-20 | 2021-01-20 | Automatic resetting control system and method for PI card of thermal power plant |
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| CN112859786A true CN112859786A (en) | 2021-05-28 |
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| CN202110075841.9A Pending CN112859786A (en) | 2021-01-20 | 2021-01-20 | Automatic resetting control system and method for PI card of thermal power plant |
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| CN101794132A (en) * | 2010-02-23 | 2010-08-04 | 浙江省新昌县康立电子有限公司 | Multichannel high-speed pulse counting method used for industrial control touch display screen |
| CN101807053A (en) * | 2010-02-23 | 2010-08-18 | 浙江省新昌县康立电子有限公司 | Structure of multi-channel high-speed pulse counting for industrial control touch screen |
| CN101995855A (en) * | 2009-08-17 | 2011-03-30 | 王世惠 | Pulse counting itinerant monitoring device |
| CN201945833U (en) * | 2010-11-25 | 2011-08-24 | 浙江省新昌县康立电子有限公司 | Multi-passage high-speed pulse counting touch-screen controller |
| CN102565673A (en) * | 2011-12-18 | 2012-07-11 | 西安航天精密机电研究所 | Highly-reliable pulse counting test system based on FPGA (Field Programmable Gate Array) |
| CN103245931A (en) * | 2013-05-30 | 2013-08-14 | 南京新联电子股份有限公司 | Electric energy meter metering pulse analog system and output method for electricity consumption information acquisition equipment |
| WO2017016273A1 (en) * | 2015-07-28 | 2017-02-02 | 无锡华润上华半导体有限公司 | Accelerator |
| CN108845517A (en) * | 2018-04-26 | 2018-11-20 | 上海飞来信息科技有限公司 | Anticoincidence circuit and pulse signal detection circuit |
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2021
- 2021-01-20 CN CN202110075841.9A patent/CN112859786A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995855A (en) * | 2009-08-17 | 2011-03-30 | 王世惠 | Pulse counting itinerant monitoring device |
| CN101794132A (en) * | 2010-02-23 | 2010-08-04 | 浙江省新昌县康立电子有限公司 | Multichannel high-speed pulse counting method used for industrial control touch display screen |
| CN101807053A (en) * | 2010-02-23 | 2010-08-18 | 浙江省新昌县康立电子有限公司 | Structure of multi-channel high-speed pulse counting for industrial control touch screen |
| CN201945833U (en) * | 2010-11-25 | 2011-08-24 | 浙江省新昌县康立电子有限公司 | Multi-passage high-speed pulse counting touch-screen controller |
| CN102565673A (en) * | 2011-12-18 | 2012-07-11 | 西安航天精密机电研究所 | Highly-reliable pulse counting test system based on FPGA (Field Programmable Gate Array) |
| CN103245931A (en) * | 2013-05-30 | 2013-08-14 | 南京新联电子股份有限公司 | Electric energy meter metering pulse analog system and output method for electricity consumption information acquisition equipment |
| WO2017016273A1 (en) * | 2015-07-28 | 2017-02-02 | 无锡华润上华半导体有限公司 | Accelerator |
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Application publication date: 20210528 |