CN101718427B - Control system of main steam pressure of large boiler - Google Patents
Control system of main steam pressure of large boiler Download PDFInfo
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- CN101718427B CN101718427B CN2009102496265A CN200910249626A CN101718427B CN 101718427 B CN101718427 B CN 101718427B CN 2009102496265 A CN2009102496265 A CN 2009102496265A CN 200910249626 A CN200910249626 A CN 200910249626A CN 101718427 B CN101718427 B CN 101718427B
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Abstract
The invention discloses a control system of main steam pressure of a large boiler and belongs to the automatic control system of a circuit of a power station boiler. The control system solves the technical problems of dynamic tracking and stable control of the main steam pressure of the large boiler. The control system comprises a PID module, a boiler unit, an A/D converter, a D/A converter and a main steam pressure sensor of the boiler. A three-dimensional real-time on-line optimizer is built by using a function module, a differential module, a multiplication module, a high value monitoring module, a low value monitoring module and an analog quantity switching module of a distributed control system, and the optimizer is added to a prior ID closed-loop control system of the boil to form an independent dynamic-tracking stable-control closed-loop control system. The control system solves the technical problems of the dynamic tracking and the stable control of the main steam pressure of the large boiler, can improve thermal economy index of the boiler and achieves the purpose of saving energy.
Description
Technical field
The present invention relates to a kind of automatic control system, particularly a kind of PID automatic control system of large-sized station boiler.
Background technology
The control of existing large-sized station boiler main steam pressure adopts the PID automatic control system of preset parameter to finish substantially.Along with the variation of boiler load and the influence of other disturbing factors, the main steam pressure dynamic characteristic of large-sized boiler has very big-difference, because the PID automatic control system of preset parameter can not adapt to the wide variation of controlled device dynamic characteristic, cause the control performance of main steam pressure of large boiler to descend, even the requirement that does not reach the control index, thereby directly influence stablizing and economical operation of boiler.
Summary of the invention
The control system of a kind of main steam pressure of large boiler provided by the invention can in time be adjusted pid parameter according to the variation of main steam pressure dynamic characteristic, has solved dynamically the following of main steam pressure of large-sized boiler combined and the stable technical problem of controlling.
The present invention overcomes the above problems by following scheme:
A kind of control system of main steam pressure of large boiler comprises the main steam pressure sensor of PID module, boiler unit, A/D converter, D/A converter and boiler, described boiler unit generated output instruction P
0Insert the input i of A/D converter
1, the output of the main steam pressure sensor of described boiler and the input i of described A/D converter
2Link to each other the output o of described A/D converter
2Link together the output o of described A/D converter with the negative input end of subtraction block
1With the first function module f
0(x) input links together, the first function module f
0(x) the output and the positive input terminal of described subtraction block link together, and have obtained main steam pressure p at the output of described subtraction block
TWith its setting value p
0Between deviation E, this deviation E links together with the input of high value monitor 8 and the input of low value monitor 9 respectively, the output of high value monitor 8 links together with the control end s of the first analogue quantity switch module 1 and the control end s of the 3rd analogue quantity switch module 3 respectively, and the output of low value monitor 9 links together with the control end s of the second analogue quantity switch module 2 and the control end s of the 4th analogue quantity switch module 4 respectively; Main steam pressure p
TWith its setting value p
0Between deviation E also obtain the pace of change E of deviation E simultaneously through a differential module
c, the pace of change E of this deviation E
cBe input to the tenth function module f respectively
22(x) input, the 9th function module f
23(x) input, the 8th function module f
24(x) input, the 7th function module f
12(x) input, the 6th function module f
13(x) input, the 5th function module f
14(x) input, the 6th function module f
13The input i of the output (x) and the first analogue quantity switch module 1
1Be connected the 7th function module f
12The input i of the output (x) and the first analogue quantity switch module 1
2Be connected the input i of the output o of the first analogue quantity switch module 1 and the second analogue quantity switch module 2
2Be connected the 5th function module f
14The input i of the output (x) and the second analogue quantity switch module 2
1Be connected the boiler load instruction P after analog-to-digital conversion
0Be connected respectively to the second function module f
11(x) input, the 3rd function module f
21(x) input, the 4th function module f
31(x) input, the second function module f
11One input of the output (x) and first multiplier module links together, another input of the output of the second analogue quantity switch module 2 and first multiplier module 5 links together, and the input of the proportional band adjustment parameter δ of the output of first multiplier module 5 and the PID module in the boiler automatic control system links together; The 9th function module f
23The input i of output (x) and the 3rd analogue quantity switch module 3
1Be connected the tenth function module f
22The input i of input (x) and the 3rd analogue quantity switch module 3
2Be connected the input i of the output o of the 3rd analogue quantity switch module 3 and the 4th analogue quantity switch module 4
2Be connected the 8th function module f
24(x) output and the 4th analogue quantity switch module 4 input i
1Link together, an input of the 4th analogue quantity switch module 4 outputs and second multiplier module 6 links together, another input of second multiplier module 6 and the 3rd function module f
21(x) output links together, and regulates parameter T the time of integration of the output of second multiplier module 6 and the PID module in the boiler automatic control system
iInput link together; The 4th analogue quantity switch module 4 outputs while and the 11 function module f
32(x) input links together, the 11 function module f
32The input of output (x) and the 3rd multiplier module 7 links together, another input of the 3rd multiplier module 7 and the 4th function module f
31(x) output links together, and regulates parameter T the derivative time of the output of the 3rd multiplier module 7 and the PID module in the boiler automatic control system
dInput link together.
Be connected with multiplier module between the input of the proportional band adjustment parameter δ of the output of first multiplier module 5 and the PID module in the boiler automatic control system, regulate parameter T the time of integration of the output of second multiplier module 6 and the PID module in the boiler automatic control system
iInput between be connected with multiplier module, regulate parameter T the derivative time of the output of the 3rd multiplier module 7 and the PID module in the boiler automatic control system
dInput between be connected with multiplier module.These multiplier modules respectively with the fixed value δ of the proportional band of former preset parameter PID adjustment module
0, the time of integration fixed value T
I0The fixed value T of derivative time
D0Multiply each other.
The invention solves to the main steam pressure of large-sized boiler dynamically with combining and the technical problem of stable control, can improve the thermal efficiency indices of boiler and reach the purpose of energy-saving and emission-reduction.
Description of drawings:
Fig. 1 is an electrical block diagram of the present invention
Fig. 2 is three-dimensional real-time online optimizer electrical block diagram
Fig. 3 is the characteristic and the parameter list of used module in the three-dimensional real-time online optimizer
The specific embodiment
At first the first to the 11 function module is carried out the function module property settings according to tabulation shown in Figure 3.
A kind of control system of main steam pressure of large boiler comprises the main steam pressure sensor of PID module, boiler unit, A/D converter, D/A converter and boiler, described boiler unit generated output instruction P
0Insert the input i of A/D converter
1, the analog output of the main steam pressure sensor of described boiler and the input i of described A/D converter
2Link to each other the output o of described A/D converter
2Link together the output o of described A/D converter with the negative input end of subtraction block
1With the first function module f
0(x) input links together, the first function module f
0(x) the output and the positive input terminal of described subtraction block link together, and have obtained main steam pressure p at the output of described subtraction block
TWith its setting value p
0Between deviation E, this deviation E links together with the input of high value monitor 8 and the input of low value monitor 9 respectively, the output of high value monitor 8 links together with the control end s of the first analogue quantity switch module 1 and the control end s of the 3rd analogue quantity switch module 3 respectively, and the output of low value monitor 9 links together with the control end s of the second analogue quantity switch module 2 and the control end s of the 4th analogue quantity switch module 4 respectively; Main steam pressure p
TWith its setting value p
0Between deviation E also obtain the pace of change E of deviation E simultaneously through a differential module
c, the pace of change E of this deviation E
cBe input to the tenth function module f respectively
22(x) input, the 9th function module f
23(x) input, f
24(x) input of function module, the 7th function module f
12(x) input; The 6th function module f
13(x) input, the 5th function module f
14(x) input, the 6th function module f
13The input i of the output (x) and the first analogue quantity switch module 1
1Be connected the 7th function module f
12The input i of the output (x) and the first analogue quantity switch module 1
2Be connected the input i of the output o of the first analogue quantity switch module 1 and the second analogue quantity switch module 2
2Be connected the 5th function module f
14The input i of the output (x) and the second analogue quantity switch module 2
1Be connected the boiler unit generated output instruction P after analog-to-digital conversion
0Be input to the second function module f respectively
11(x) input, the 3rd function module f
21(x) input, the 4th function module f
31(x) input, the second function module f
11One input of the output (x) and first multiplier module 5 links together, another input of the output of the second analogue quantity switch module 2 and first multiplier module 5 links together, and the input of the proportional band adjustment parameter δ of the output of first multiplier module 5 and the PID module in the boiler automatic control system links together; The 9th function module f
23The input i of output (x) and the 3rd analogue quantity switch module 3
1Be connected the tenth function module f
22The input i of input (x) and the 3rd analogue quantity switch module 3
2Be connected the input i of the output o of the 3rd analogue quantity switch module 3 and the 4th analogue quantity switch module 4
2Be connected the 8th function module f
24(x) output and the 4th analogue quantity switch module 4 input i
1Link together, an input of the 4th analogue quantity switch module 4 outputs and second multiplier module 6 links together, another input of second multiplier module 6 and the 3rd function module f
21(x) output links together, and regulates parameter T the time of integration of the output of second multiplier module 6 and the PID module in the boiler automatic control system
iInput link together; The 4th analogue quantity switch module 4 outputs while and the 11 function module f
32(x) input links together, the 11 function module f
32The input of output (x) and the 3rd multiplier module 7 links together, another input of the 3rd multiplier module 7 and the 4th function module f
31(x) output links together, and regulates parameter T the derivative time of the output of the 3rd multiplier module 7 and the PID module in the boiler automatic control system
dInput link together.
Be connected with multiplier module between the input of the proportional band adjustment parameter δ of the output of first multiplier module 5 and the PID module in the boiler automatic control system, regulate parameter T the time of integration of the output of second multiplier module 6 and the PID module in the boiler automatic control system
iInput between be connected with multiplier module, regulate parameter T the derivative time of the output of the 3rd multiplier module 7 and the PID module in the boiler automatic control system
dInput between be connected with multiplier module.These multiplier modules respectively with the fixed value δ of the proportional band of former preset parameter PID adjustment module
0, the time of integration fixed value T
I0The fixed value T of derivative time
D0Multiply each other.
Claims (2)
1. the control system of a main steam pressure of large boiler comprises it is characterized in that the main steam pressure sensor of PID module, boiler unit, A/D converter, D/A converter and boiler: the generated output instruction P of described boiler unit
0Insert the input i of A/D converter
1, the analog output of the main steam pressure sensor of described boiler and the input i of described A/D converter
2Link to each other the output o of described A/D converter
2Link together the output o of described A/D converter with the negative input end of subtraction block
1With the first function module f
0(x) input links together, the first function module f
0(x) the output and the positive input terminal of described subtraction block link together, and have obtained main steam pressure p at the output of described subtraction block
TWith main steam pressure setting value p
0Between deviation E, this deviation E links together with the input of high value monitor (8) and the input of low value monitor (9) respectively, the output of high value monitor (8) links together with the control end s of the first analogue quantity switch module (1) and the control end s of the 3rd analogue quantity switch module (3) respectively, and the output of low value monitor (9) links together with the control end s of the second analogue quantity switch module (2) and the control end s of the 4th analogue quantity switch module (4) respectively; Main steam pressure p
TWith its setting value p
0Between deviation E also obtain the pace of change E of deviation E simultaneously through a differential module
c, the pace of change E of this deviation E
cBe input to the tenth function module f respectively
22(x) input, the 9th function module f
23(x) input, the 8th function module f
24(x) input, the 7th function module f
12(x) input, the 6th function module f
13(x) input, the 5th function module f
14(x) input, the 6th function module f
13The input i of the output (x) and the first analogue quantity switch module (1)
1Be connected the 7th function module f
12The input i of the output (x) and the first analogue quantity switch module (1)
2Be connected the input i of the output o of the first analogue quantity switch module (1) and the second analogue quantity switch module (2)
2Be connected the 5th function module f
14The input i of the output (x) and the second analogue quantity switch module (2)
1Be connected the boiler unit generated output instruction P after analog-to-digital conversion
0Be input to the second function module f respectively
11(x) input, the 3rd function module f
21(x) input, the 4th function module f
31(x) input, the second function module f
11One input of output (x) and first multiplier module (5) links together, another input of the output of the second analogue quantity switch module (2) and first multiplier module (5) links together, and the input of the proportional band adjustment parameter δ of the output of first multiplier module (5) and the PID module in the boiler automatic control system links together; The 9th function module f
23The input i of output (x) and the 3rd analogue quantity switch module (3)
1Be connected the tenth function module f
22The input i of output (x) and the 3rd analogue quantity switch module (3)
2Be connected the input i of the output o of the 3rd analogue quantity switch module (3) and the 4th analogue quantity switch module (4)
1Be connected the 8th function module f
24(x) output and the 4th analogue quantity switch module (4) input i
2Link together, an input of the 4th analogue quantity switch module (4) output and second multiplier module (6) links together, another input of second multiplier module (6) and the 3rd function module f
21(x) output links together, and regulates parameter T the time of integration of the output of second multiplier module (6) and the PID module in the boiler automatic control system
iInput link together; The 4th analogue quantity switch module (4) output while and the 11 function module f
32(x) input links together, the 11 function module f
32The input of output (x) and the 3rd multiplier module (7) links together, another input of the 3rd multiplier module (7) and the 4th function module f
31(x) output links together, and regulates parameter T the derivative time of the output of the 3rd multiplier module (7) and the PID module in the boiler automatic control system
dInput link together.
2. the control system of main steam pressure of large boiler according to claim 1, it is characterized in that: be connected with multiplier module between the input of the proportional band adjustment parameter δ of the output of first multiplier module (5) and the PID module in the boiler automatic control system, regulate parameter T the time of integration of the output of second multiplier module (6) and the PID module in the boiler automatic control system
iInput between be connected with multiplier module, regulate parameter T the derivative time of the output of the 3rd multiplier module (7) and the PID module in the boiler automatic control system
dInput between be connected with multiplier module.
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| CN2009102496265A CN101718427B (en) | 2009-12-09 | 2009-12-09 | Control system of main steam pressure of large boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102496265A CN101718427B (en) | 2009-12-09 | 2009-12-09 | Control system of main steam pressure of large boiler |
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| CN101718427A CN101718427A (en) | 2010-06-02 |
| CN101718427B true CN101718427B (en) | 2011-05-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588939A (en) * | 2012-03-06 | 2012-07-18 | 山西省电力公司电力科学研究院 | Main boiler control system for large thermal power generating unit |
| CN102607053A (en) * | 2012-02-29 | 2012-07-25 | 东南大学 | Intermittent control method for eliminating static deviation of main steam pressure of fossil fuel fired power unit |
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| CN102563598B (en) * | 2012-01-31 | 2013-12-11 | 山东电力研究院 | Control optimizing method for master controller of supercritical unit boilers |
| CN103148347B (en) * | 2013-03-18 | 2015-07-15 | 福建省文松彩印有限公司 | Automatic steam pressure regulation system for using steamer platform |
| CN103791482B (en) * | 2014-01-22 | 2015-06-03 | 国家电网公司 | Thermal power generating unit hearth pressure segmentation control method |
| CN104296120A (en) * | 2014-10-09 | 2015-01-21 | 阳城国际发电有限责任公司 | Hearth pressure control method and hearth pressure control system |
| CN105805722A (en) * | 2014-12-30 | 2016-07-27 | 华润电力（菏泽）有限公司 | Boiler pressure monitoring method and system |
| CN106855714B (en) * | 2015-12-09 | 2019-03-08 | 上海华林工业气体有限公司 | A kind of device and method limiting PID controller output pulsation |
| CN111520700B (en) * | 2020-04-03 | 2021-11-23 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Differential calculation method based on real-time correction of boiler main steam pressure regulation deviation |
-
2009
- 2009-12-09 CN CN2009102496265A patent/CN101718427B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607053A (en) * | 2012-02-29 | 2012-07-25 | 东南大学 | Intermittent control method for eliminating static deviation of main steam pressure of fossil fuel fired power unit |
| CN102607053B (en) * | 2012-02-29 | 2014-07-09 | 东南大学 | Intermittent control method for eliminating static deviation of main steam pressure of fossil fuel fired power unit |
| CN102588939A (en) * | 2012-03-06 | 2012-07-18 | 山西省电力公司电力科学研究院 | Main boiler control system for large thermal power generating unit |
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| CN101718427A (en) | 2010-06-02 |
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Effective date of registration: 20120920 Address after: 100031 West Chang'an Avenue, Beijing, No. 86 Patentee after: State Grid Corporation of China Patentee after: Electric Power Research Institute of Shanxi Electric Power Company Address before: 030001 Qingnian Road, Shanxi, No. 6, Patentee before: Electric Power Research Institute of Shanxi Electric Power Company |