CN202025215U - RB (runback) logic optimization configuration control system of induced draft fans - Google Patents
RB (runback) logic optimization configuration control system of induced draft fans Download PDFInfo
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- CN202025215U CN202025215U CN2011200994926U CN201120099492U CN202025215U CN 202025215 U CN202025215 U CN 202025215U CN 2011200994926 U CN2011200994926 U CN 2011200994926U CN 201120099492 U CN201120099492 U CN 201120099492U CN 202025215 U CN202025215 U CN 202025215U
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- draft fans
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Abstract
The utility model relates to an RB (runback) logic optimization configuration control system of induced draft fans, comprising a PID (proportion-integral-differential) controller, a balance block and a selection module, wherein the deviation between the pressure set value of a hearth and the practical pressure of the hearth is output to the balance block by the PID controller; the output of the balance block is conveyed to static blade adjusting devices of the induced draft fans; and the selection module is arranged between the PID controller and the balance block and is respectively connected with an RB module of an air blower and an RB module of the induced draft fans. When RB occurs on the air blower or the induced draft fans, small selection is carried out on the output value of the PID controller with the selected 'A' or 'B', then the selected value is conveyed to the balance block, the phenomena such as sharp current increase of the induced draft fans and integral saturation in the adjustment process of static blades the induced draft fans can be avoided. Due to the protection logic of mutual tripping for the RB of the air blower and the induced draft fans, in the scheme, the RB of the induced draft fans or the air blower triggers the protection logic, i.e., the selection module selects different instructions to carry out small selection with the output of the PID controller, and then the instructions and the output are conveyed to all the static blade adjusting device of the induced draft fans.
Description
Technical field
The utility model relates to a kind of induced draft fan RB logic optimization configuration control system.
Background technology
Scattered control system is generally used in the fuel-burning power plant, and (Distributed Control System DCS) controls the operation of whole unit.(Coordination Control System CCS) is under the jurisdiction of scattered control system to coordinated control system, is to coordinate boiler and turbine work state and energy relation between supply and demand by control loop.
When unit major pant item fault trip causes the real power of unit to be restricted (coordinated control system is at auto state), for adaptation equipment is exerted oneself, coordinated control system forces unit load is reduced to the load desired value that still can bear at the subsidiary engine that moves.This function of coordinated control system is called auxiliary machinery fault load shedding (RUNBACK), is called for short RB.
The RB function of unit is the critical function in the CCS control system.
The former logic of induced draft fan stator blade control mode as shown in Figure 1
The deviation of furnace pressure setting value and furnace pressure actual value is exported to counterbalance weight after calculating by the PID controller, and counterbalance weight is with parallel each the induced draft fan stator blade regulating device that flows to of steering order.
The risk that exists: after arbitrary induced draft fan or pressure fan RB, because combustion chamber draft and setting value all do not change the output that causes PID and can not change after induced draft fan or pressure fan RB take place yet, and because the equilibrium function that counterbalance weight had will cause the original parallel instruction that flows to two induced draft fans all to export to the induced draft fan that RB does not take place after RB takes place, this will cause this induced draft fan instruction intensity to reach not taking place the twice of intensity before the RB moment, thereby the situation that causes this induced draft fan immediate current to increase, simultaneously, the maximal regulated scope that the instruction that might cause flowing to the induced draft fan that RB does not take place owing to the increase of instruction intensity surpasses regulating device causes the saturated phenomenon of integration, will cause serious consequences such as jumping machine under the serious situation.
Summary of the invention
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, provides a kind of induced draft fan of avoiding to occur that electric current increases sharply and saturated function of integration and safe induced draft fan RB logic optimization configuration control system appear in induced draft fan stator blade adjustment process.
For achieving the above object, the utility model adopts following technical proposals:
A kind of induced draft fan RB logic optimization configuration control system, comprise PID controller, counterbalance weight and selection module, counterbalance weight links to each other with some induced draft fan stator blade regulating devices respectively, between described PID controller and the counterbalance weight selection module is arranged, select module to link to each other with induced draft fan RB module with pressure fan RB module respectively.
Select module to adopt prior art, model is the TRANSFER algorithmic block in the selection module employing OVATION system of this patent.
The description of algorithmic block:
As shown in Figure 3, the TRANSFER algorithm is carried out the switching between the two-way input.If digital quantity input FLAG is TRUE, then output equals the IN2 input; If digital quantity input FLAG is FALSE, then output equals the IN1 input.
The utility model independently is provided with the logic of pressure fan RB, induced draft fan RB, behind pressure fan or induced draft fan generation RB, by selecting " A " or " B ", the value after will selecting again and the output of PID controller compare, select to export to counterbalance weight again behind the smaller, thereby avoid occurring the saturated phenomenon of integration in surge of induced draft fan electric current and the induced draft fan stator blade adjustment process.
Owing to there is the protection logic of the mutual tripping operation of pressure fan RB and induced draft fan RB in the steering logic; so the revision of the logic control scheme after optimizing for pressure fan RB or induced draft fan RB all with the trigger protection logic, promptly after selecting module to select the output of different instructions and PID controller to compare and get smaller value, flow to induced draft fan again.
Description of drawings
Fig. 1 is prior art control principle figure;
Fig. 2 is the utility model control system schematic diagram;
Fig. 3 is that the utility model is selected modular algorithm piece figure;
Embodiment:
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in Figure 2, a kind of induced draft fan RB logic optimization configuration control system comprises PID controller and counterbalance weight, selects module.Counterbalance weight links to each other with some induced draft fan stator blade regulating devices respectively, is in series with the selection module between described PID controller and the counterbalance weight, selects module to link to each other with induced draft fan RB module with pressure fan RB module respectively.
Select module to adopt prior art, model is the method piece of TRANSFER in the selection module employing OVATION system of this patent.
The description of algorithmic block:
As shown in Figure 3, the TRANSFER algorithm is carried out the switching between the two-way input.If digital quantity input FLAG is TRUE, then output equals the IN1 input; If digital quantity input FLAG is FALSE, then output equals the IN2 input.
The utility model independently is provided with the logic of pressure fan RB, induced draft fan RB, behind pressure fan or induced draft fan generation RB, by selecting " A " or " B ", the value after will selecting again and the output of PID controller compare, select to export to counterbalance weight again behind the smaller, occur that electric current increases sharply and the saturated phenomenon of integration appears in induced draft fan stator blade adjustment process thereby avoid occurring induced draft fan.
Owing to there is the protection logic of the mutual tripping operation of pressure fan RB and induced draft fan RB in the steering logic; so the revision of the logic control scheme after optimizing for pressure fan RB or induced draft fan RB all with the trigger protection logic, flow to induced draft fan again after promptly comparing and get smaller value by the output of selecting different instruction of module (being the T module among Fig. 2) selection and PID controller.
Claims (1)
1. induced draft fan RB logic optimization configuration control system, comprise PID controller and counterbalance weight, the output terminal of counterbalance weight links to each other with each induced draft fan stator blade regulating device respectively, it is characterized in that: between described PID controller and the counterbalance weight selection module is arranged, select module to link to each other with induced draft fan RB module with pressure fan RB module respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200994926U CN202025215U (en) | 2011-04-07 | 2011-04-07 | RB (runback) logic optimization configuration control system of induced draft fans |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200994926U CN202025215U (en) | 2011-04-07 | 2011-04-07 | RB (runback) logic optimization configuration control system of induced draft fans |
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| CN202025215U true CN202025215U (en) | 2011-11-02 |
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| CN2011200994926U Expired - Fee Related CN202025215U (en) | 2011-04-07 | 2011-04-07 | RB (runback) logic optimization configuration control system of induced draft fans |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661283A (en) * | 2012-05-14 | 2012-09-12 | 山东电力研究院 | Power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof |
| CN102928245A (en) * | 2012-10-25 | 2013-02-13 | 辽宁省电力有限公司电力科学研究院 | RB (Radio Beacon) test no-load release method |
| CN104848194A (en) * | 2015-05-13 | 2015-08-19 | 国家电网公司 | Method and system for draft control of thermal power generating unit applicable to environmental-friendly control technology |
| CN104848253A (en) * | 2015-05-13 | 2015-08-19 | 国家电网公司 | Method and device for air capacity control of thermal power generating unit applicable to low nitrogen oxide emission and air capacity control system |
| CN105135405A (en) * | 2015-08-17 | 2015-12-09 | 国家电网公司 | Induced draft fan RB control method of high-sodium lignite tower boiler unit |
| CN109062037A (en) * | 2018-07-02 | 2018-12-21 | 浙江浙能中煤舟山煤电有限责任公司 | One kind is based on the dispersion modified fossil power plant auxiliary engine RUNBACK control method of calorific value |
-
2011
- 2011-04-07 CN CN2011200994926U patent/CN202025215U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661283A (en) * | 2012-05-14 | 2012-09-12 | 山东电力研究院 | Power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof |
| CN102661283B (en) * | 2012-05-14 | 2014-09-03 | 山东电力研究院 | Power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof |
| CN102928245A (en) * | 2012-10-25 | 2013-02-13 | 辽宁省电力有限公司电力科学研究院 | RB (Radio Beacon) test no-load release method |
| CN104848194A (en) * | 2015-05-13 | 2015-08-19 | 国家电网公司 | Method and system for draft control of thermal power generating unit applicable to environmental-friendly control technology |
| CN104848253A (en) * | 2015-05-13 | 2015-08-19 | 国家电网公司 | Method and device for air capacity control of thermal power generating unit applicable to low nitrogen oxide emission and air capacity control system |
| CN105135405A (en) * | 2015-08-17 | 2015-12-09 | 国家电网公司 | Induced draft fan RB control method of high-sodium lignite tower boiler unit |
| CN109062037A (en) * | 2018-07-02 | 2018-12-21 | 浙江浙能中煤舟山煤电有限责任公司 | One kind is based on the dispersion modified fossil power plant auxiliary engine RUNBACK control method of calorific value |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111102 Termination date: 20140407 |