CN114384797A - Steam temperature control method for thermal power plant - Google Patents
Steam temperature control method for thermal power plant Download PDFInfo
- Publication number
- CN114384797A CN114384797A CN202210006043.5A CN202210006043A CN114384797A CN 114384797 A CN114384797 A CN 114384797A CN 202210006043 A CN202210006043 A CN 202210006043A CN 114384797 A CN114384797 A CN 114384797A
- Authority
- CN
- China
- Prior art keywords
- steam temperature
- pid controller
- unit
- temperature
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000779 smoke Substances 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000007547 defect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Images
Classifications
-
- 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
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Feedback Control In General (AREA)
Abstract
The invention discloses a steam temperature control method for a thermal power plant, which comprises the following steps: A. establishing a first PID controller and a second PID controller, wherein the control object of the first PID controller is the main steam temperature of the unit, and the control object of the second PID controller is the average exhaust smoke temperature; B. carrying out feedforward control on the main steam temperature of the unit by using the average exhaust smoke temperature; C. and correcting the main steam temperature of the unit by using the temperature-reducing water flow, the fuel input amount and the burner angle. The invention can improve the defects of the prior art and improve the robustness of steam temperature control.
Description
Technical Field
The invention relates to the technical field of power plant automation, in particular to a steam temperature control method for a thermal power plant.
Background
Steam is a power source for a steam turbine to do work, and the temperature of the steam is one of important factors influencing the power generation efficiency of the thermal power generating unit. Due to the fact that the steam temperature control factors are more, a steam temperature control system in the prior art is complex, the robustness of the system is generally low, and the problem that steam temperature control is inaccurate due to temporary fluctuation of working conditions easily under actual working conditions is caused.
Disclosure of Invention
The invention aims to provide a steam temperature control method for a thermal power plant, which can overcome the defects of the prior art and improve the robustness of steam temperature control.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A steam temperature control method for a thermal power plant comprises the following steps:
A. establishing a first PID controller and a second PID controller, wherein the control object of the first PID controller is the main steam temperature of the unit, and the control object of the second PID controller is the average exhaust smoke temperature;
B. carrying out feedforward control on the main steam temperature of the unit by using the average exhaust smoke temperature;
C. and correcting the main steam temperature of the unit by using the temperature-reducing water flow, the fuel input amount and the burner angle.
Preferably, in the step a, an association function of the main steam temperature and the average exhaust gas temperature of the unit is established, the parameter setting result of the first PID controller is processed by using the association function, and the processing result is used as a preset reference value for parameter setting of the second PID controller.
Preferably, in the step B, a corresponding feedforward control proportion is set according to a deviation between the main steam temperature of the unit and a preset value, and the feedforward control data and the corresponding feedforward control proportion are weighted and then the main steam temperature of the unit is subjected to feedforward control.
Preferably, the feedforward control priority in step B is higher than the feedback control priority of the first PID controller, the feedback control of the first PID controller is suspended when the feedforward control is performed, and the feedback control of the first PID controller is performed after a delay after the feedforward control is completed for each round.
Preferably, in step C, real-time influence factors of the attemperation water flow, the fuel input amount and the burner angle on the main steam temperature of the unit are calculated respectively, and a correction term with the largest influence factor is selected to correct the main steam temperature of the unit.
Preferably, in step C, a minimum correction amount threshold value is set, and when the correction amount to be executed is smaller than the minimum correction amount threshold value, the present correction operation is stopped.
Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: according to the invention, different operation parameters of the generator set are integrated, the control strategy is optimized, unnecessary control links are reduced, the robustness of the control flow is effectively improved, and the accuracy of steam temperature control can be ensured when the working condition disturbance occurs to the generator set.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
Referring to fig. 1, one embodiment of the present invention includes the steps of:
A. establishing a first PID controller and a second PID controller, wherein the control object of the first PID controller is the main steam temperature of the unit, and the control object of the second PID controller is the average exhaust smoke temperature;
B. carrying out feedforward control on the main steam temperature of the unit by using the average exhaust smoke temperature;
C. and correcting the main steam temperature of the unit by using the temperature-reducing water flow, the fuel input amount and the burner angle.
And step A, establishing an incidence relation function of the main steam temperature and the average exhaust gas temperature of the unit, and processing the parameter setting result of the first PID controller by using the incidence relation function, wherein the processing result is used as a preset reference value for parameter setting of the second PID controller.
And B, setting a corresponding feedforward control proportion according to the deviation of the main steam temperature of the unit and a preset value, weighting the feedforward control data and the corresponding feedforward control proportion, and then performing feedforward control on the main steam temperature of the unit.
And B, the feedforward control priority of the step B is higher than the feedback control priority of the first PID controller, the feedback control of the first PID controller is suspended when the feedforward control is carried out, the time delay is carried out after each round of feedforward control is finished, and then the feedback control of the first PID controller is carried out.
And C, respectively calculating real-time influence factors of the temperature-reducing water flow, the fuel input amount and the burner angle on the main steam temperature of the unit, and selecting a correction term with the largest implementation influence factor to correct the main steam temperature of the unit.
In step C, a minimum correction amount threshold is set, and when the correction amount to be executed is smaller than the minimum correction amount threshold, the present correction operation is stopped.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A steam temperature control method for a thermal power plant is characterized by comprising the following steps:
A. establishing a first PID controller and a second PID controller, wherein the control object of the first PID controller is the main steam temperature of the unit, and the control object of the second PID controller is the average exhaust smoke temperature;
B. carrying out feedforward control on the main steam temperature of the unit by using the average exhaust smoke temperature;
C. and correcting the main steam temperature of the unit by using the temperature-reducing water flow, the fuel input amount and the burner angle.
2. The steam temperature control method for a thermal power plant according to claim 1, characterized in that: and step A, establishing an incidence relation function of the main steam temperature and the average exhaust gas temperature of the unit, and processing the parameter setting result of the first PID controller by using the incidence relation function, wherein the processing result is used as a preset reference value for parameter setting of the second PID controller.
3. The steam temperature control method for a thermal power plant according to claim 2, characterized in that: and B, setting a corresponding feedforward control proportion according to the deviation of the main steam temperature of the unit and a preset value, weighting the feedforward control data and the corresponding feedforward control proportion, and then performing feedforward control on the main steam temperature of the unit.
4. The steam temperature control method for a thermal power plant according to claim 3, characterized in that: and B, the feedforward control priority of the step B is higher than the feedback control priority of the first PID controller, the feedback control of the first PID controller is suspended when the feedforward control is carried out, the time delay is carried out after each round of feedforward control is finished, and then the feedback control of the first PID controller is carried out.
5. The steam temperature control method for a thermal power plant according to claim 4, characterized in that: and C, respectively calculating real-time influence factors of the temperature-reducing water flow, the fuel input amount and the burner angle on the main steam temperature of the unit, and selecting a correction term with the largest implementation influence factor to correct the main steam temperature of the unit.
6. The steam temperature control method for a thermal power plant according to claim 5, characterized in that: in step C, a minimum correction amount threshold is set, and when the correction amount to be executed is smaller than the minimum correction amount threshold, the present correction operation is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210006043.5A CN114384797B (en) | 2022-01-05 | 2022-01-05 | Steam temperature control method for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210006043.5A CN114384797B (en) | 2022-01-05 | 2022-01-05 | Steam temperature control method for thermal power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114384797A true CN114384797A (en) | 2022-04-22 |
| CN114384797B CN114384797B (en) | 2024-03-22 |
Family
ID=81199315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210006043.5A Active CN114384797B (en) | 2022-01-05 | 2022-01-05 | Steam temperature control method for thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114384797B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09303705A (en) * | 1996-05-10 | 1997-11-28 | Mitsubishi Heavy Ind Ltd | Major vapor pressure, temperature control device for once-through boiler |
| CN1652938A (en) * | 2002-03-25 | 2005-08-10 | 三菱重工业株式会社 | Misregistration when printing speed is changed, cutting misregistration, or pinter in which variation of printing density can be controlled |
| JP2007187340A (en) * | 2006-01-11 | 2007-07-26 | Nippon Steel Engineering Co Ltd | Boiler main steam temperature control method for waste treatment facility |
| CN103557511A (en) * | 2013-11-18 | 2014-02-05 | 华北电力大学（保定） | All-process control method for main steam temperature of utility boiler |
| CN103712195A (en) * | 2014-01-03 | 2014-04-09 | 福建龙净环保股份有限公司 | Flue gas temperature adjusting method, device and system |
| CN105138041A (en) * | 2015-09-22 | 2015-12-09 | 河北省电力建设调整试验所 | Method for controlling main steam temperature of thermal power generating unit for implementing DCS |
| CN106094740A (en) * | 2016-05-09 | 2016-11-09 | 国网江西省电力科学研究院 | A kind of fired power generating unit duty control method based on superheater accumulation of heat feedforward |
| CN107035537A (en) * | 2017-04-28 | 2017-08-11 | 申能股份有限公司 | A kind of combined cycle warming-up load dynamic matching method |
| CN110107407A (en) * | 2019-04-19 | 2019-08-09 | 江苏国信淮安第二燃气发电有限责任公司 | A method of optimization combustion engine IGV control promotes Gas-steam Combined Cycle efficiency |
| CN110986067A (en) * | 2019-12-06 | 2020-04-10 | 上海电气燃气轮机有限公司 | Blow pipe system for combined cycle power plant boiler and operation method thereof |
| CN113094896A (en) * | 2021-04-07 | 2021-07-09 | 国能(泉州)热电有限公司 | Power plant heat supply unit optimization control method |
| CN113110657A (en) * | 2021-04-22 | 2021-07-13 | 上海呈彧智能科技有限公司 | Method, system and medium for controlling hearth pressure and exhaust gas temperature of heating furnace |
-
2022
- 2022-01-05 CN CN202210006043.5A patent/CN114384797B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09303705A (en) * | 1996-05-10 | 1997-11-28 | Mitsubishi Heavy Ind Ltd | Major vapor pressure, temperature control device for once-through boiler |
| CN1652938A (en) * | 2002-03-25 | 2005-08-10 | 三菱重工业株式会社 | Misregistration when printing speed is changed, cutting misregistration, or pinter in which variation of printing density can be controlled |
| JP2007187340A (en) * | 2006-01-11 | 2007-07-26 | Nippon Steel Engineering Co Ltd | Boiler main steam temperature control method for waste treatment facility |
| CN103557511A (en) * | 2013-11-18 | 2014-02-05 | 华北电力大学（保定） | All-process control method for main steam temperature of utility boiler |
| CN103712195A (en) * | 2014-01-03 | 2014-04-09 | 福建龙净环保股份有限公司 | Flue gas temperature adjusting method, device and system |
| CN105138041A (en) * | 2015-09-22 | 2015-12-09 | 河北省电力建设调整试验所 | Method for controlling main steam temperature of thermal power generating unit for implementing DCS |
| CN106094740A (en) * | 2016-05-09 | 2016-11-09 | 国网江西省电力科学研究院 | A kind of fired power generating unit duty control method based on superheater accumulation of heat feedforward |
| CN107035537A (en) * | 2017-04-28 | 2017-08-11 | 申能股份有限公司 | A kind of combined cycle warming-up load dynamic matching method |
| CN110107407A (en) * | 2019-04-19 | 2019-08-09 | 江苏国信淮安第二燃气发电有限责任公司 | A method of optimization combustion engine IGV control promotes Gas-steam Combined Cycle efficiency |
| CN110986067A (en) * | 2019-12-06 | 2020-04-10 | 上海电气燃气轮机有限公司 | Blow pipe system for combined cycle power plant boiler and operation method thereof |
| CN113094896A (en) * | 2021-04-07 | 2021-07-09 | 国能(泉州)热电有限公司 | Power plant heat supply unit optimization control method |
| CN113110657A (en) * | 2021-04-22 | 2021-07-13 | 上海呈彧智能科技有限公司 | Method, system and medium for controlling hearth pressure and exhaust gas temperature of heating furnace |
Non-Patent Citations (3)
| Title |
|---|
| LIU JI-ZHEN 等: "Partial feed-forward decoupling based PI control of CFBB combustion system", 《THE 26TH CHINESE CONTROL AND DECISION CONFERENCE (2014 CCDC)》, 31 December 2014 (2014-12-31) * |
| 康静秋 等: "主蒸汽温度控制系统前馈的优化", 《热力发电》, vol. 42, no. 1, 31 January 2013 (2013-01-31) * |
| 张宝瑞: "火电厂锅炉主汽温度控制研究", 《科技风》, pages 108 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114384797B (en) | 2024-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103576655B (en) | A kind of power boiler burning subspace modeling and Multipurpose Optimal Method and system | |
| CN105700570B (en) | SCR denitration control method for thermal power plant | |
| CN110309585B (en) | Implementation method of flexible coordination controller | |
| CN109763932B (en) | Speed regulator water head opening and active power tandem curve self-adaptive control method | |
| CN106020164B (en) | A kind of fast fuel calorific value bearing calibration applied to fired power generating unit | |
| CN112039091B (en) | Primary frequency modulation control method based on zero number high-order addition | |
| CN111950118B (en) | Operation optimization method and equipment for gas-steam combined generator set | |
| CN109078496B (en) | Denitration control method and device based on ammonia escape | |
| CN114384797B (en) | Steam temperature control method for thermal power plant | |
| CN114856901A (en) | Method and system for adjusting opening degree of guide vane of speed regulator of water turbine | |
| CN112231978B (en) | Boiler flue gas acid dew point testing method based on artificial neural network | |
| KR20190057732A (en) | Apparatus and Method for Controlling Attemperator using Machine Learning method | |
| CN109375507B (en) | Thermal power generating unit deep peak regulation control method | |
| CN115857571A (en) | Method for correcting parameters of single valve and sequence valve based on DEH valve flow characteristics | |
| CN116816466A (en) | Main steam temperature optimization adjustment method for gas-steam combined cycle unit | |
| CN113110316B (en) | Primary frequency modulation control method for steam turbine of combined cycle unit | |
| CN110134003A (en) | The fired power generating unit varying duty dynamic Feedforward control method of adaptive AGC operating condition | |
| CN113375187B (en) | Method for reducing overshoot of coal feeding amount in variable load process of coal-fired unit and related components | |
| CN117989054B (en) | Domestic fan intelligent control method, system and equipment | |
| CN112287535B (en) | Method and system for determining minimum operation load of thermal power generating unit | |
| CN113281988B (en) | Primary frequency modulation control method for steam turbine generator of double-shaft combined cycle unit | |
| CN113467331B (en) | Method for analyzing influence of controller parameters on automatic power generation control regulation performance | |
| CN111780084B (en) | Control method and device for advanced acceleration optimization of boiler and storage medium | |
| Zhu et al. | Application of cascade PID plus feedforward in automatic denitration control | |
| CN111193275B (en) | Method for improving primary frequency modulation action effect of generator set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |