CN202048569U - Coordination control device of large-scale CFB (circulating fluidized bed) unit based on intensified combustion - Google Patents
Coordination control device of large-scale CFB (circulating fluidized bed) unit based on intensified combustion Download PDFInfo
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Abstract
The utility model provides a coordination control device of a large-scale CFB (circulating fluidized bed) unit based on intensified combustion, which comprises a load control centre loop, a steam turbine main control loop and a boiler main control loop; a novel limitation scheme is adopted by a load instruction change rate: a load coordination fuzzy control loop is adopted; the limitation on the load change rate is smoothly and gradually increased according to the degrees of a bed temperature and the main vapor pressure, which exceed the normal range; combinations of fuzzy feedforward controllers and fuzzy self-adjusting PID (proportional-integral-derivative) controllers are adopted by the steam turbine main control loop and the boiler main control loop, so a power generation load and a thermal load of the unit are jointly controlled; control rules of feedforwarad control modules are fused with experience of operation personnel and experts, and fuzzy control rules are formed according to the control quality of the boiler main control loop and the steam turbine main control, which is corresponding to different loads during operation; in the steam turbine main control loop, a fuzzy feedforward controller of load instructions is added and is combined with a fuzzy self-adjusting PID controller, so the power generation load is jointly controlled; and in the boiler main control loop, an intensified combustion fuzzy feedforward controller is additionally added.
Description
Technical field
The utility model relates to the operating control device of a kind of independent development type recirculating fluidized bed (CFB) boiler, especially finger is a kind of can accelerate exerting oneself of burning in circulating fluid bed boiler, coordination control boiler and steam turbine better, satisfies the unit cooperative control device of electrical network to the requirement (2%Pe/min) of unit AGC.
Background technology
Characteristics such as recirculating fluidized bed (CFB) boiler is wide with burning, fuel tolerance that it cleans, load regulation rate is wide, obtained in recent years developing rapidly, subcritical large-scale (evaporation capacity 1025t/h) CFB of independent development puts into commercial operation, the CFB of China has entered the developing stage of subcritical parameter, and the Large-scale CFB of independent development becomes one of preferred technology of thermal power plant.But, because the CFB boiler combustion process is special, the thermal inertia of large circulating fluidized bed boiler wants big more than the conventional pulverized-coal stove, main vapour pressure just responds behind coal-supplying amount disturbance 16～20min, and the delay time of coal-powder boiler is 4～6min, and this has just influenced the varying duty speed of Large-scale CFB unit greatly.Be difficult to satisfy the burning control of CFBB when making normal the operation for the effective conventional control method of pulverized-coal fired boiler, homemade CFB unit does not drop into the control of AGC for a long time well; And the CFB of the Large-scale CFB of independent development and introduction has very big difference at aspects such as boiler process structure, control modes, and the effective burning control of introduction type CFB scheme can not satisfy the regulation and control requirement of Large-scale CFB; The burning control quality that how to improve this class CFB satisfies the load responding requirement of electrical network AGC to unit, has become this class CFB unit large-scale promotion application, the key technology that must solve.
Compare with the coal-powder boiler of peer, CFBB has following difference:
1, the heat accumulation of boiler is bigger than coal-powder boiler.The ignition temperature of CFB is 890-900 ℃, be so-called nothing " flame ", combustion system is to mix and disturbance with coal grain on entering the burner hearth bed by the fluidisation of high hotbed material, so, the coal grain will pass through multiple cycles, after-flame progressively, thereby reach effect of combustion, and its raw coal granularity is higher than coal-powder boiler far away, and (the former coal particle average grain diameter of fluid bed can reach 1.5mm, coal-powder boiler is then substantially below 0.09mm), therefore, enter the coal grain of CFB, its tail-off time is much longer, and just fluosolids contains jumbo heat accumulation in stove.Add that homemade CFB is a subcritical boiler now, also have the heat accumulation of drum.
2, boiler side delay with inertia bigger.Since coal enter have in the CFB stove one be heated, oven dry, explosion, the process of catching fire, circulate, show the variation hysteresis of steam pressure; Cause the machine stove to have very big-difference adapting on the load changing rate, the inertia of boiler and delay very big.
3, there is bigger time variation in boiler.Static gain when the static gain of regulated variable will be higher than high load capacity when underload, and the dynamic response time of each regulated variable is longer than the dynamic response time of high load capacity during underload.Bed temperature is also lower when boiler load is low, initiate coal facies to also difficulty catch fire, so that bed temperature promotes is slower, thereby cause the temperature increase of burner hearth back-end ductwork slow, so that main stripping temperature, main vapour pressure and main steam flow amount promote is slow.Because boiler capacity was also lower when load was low, the heat that heat-transfer surface absorbs is also less, so bed temperature rising amplitude is bigger, thus master's stripping temperature during underload, main vapour pressure and main steam flow amount rising amplitude are also bigger.
The utility model content
The technical problems to be solved in the utility model, just provide the device that a cover can be coordinated to control to the large-size circulating fluidized bed combustion process of independent development, this device can make this class CFB unit steady in a long-termly drop into and coordinate control, unit can satisfy the varying duty rate of electrical network AGC process, the requirement of varying duty scope, keep parameter stabilities such as main vapour pressure, bed temperature in the varying duty process, guarantee unit safety, economical operation.
Above-mentioned utility model purpose is achieved through the following technical solutions:
A kind of large circulating fluidized bed unit cooperative control device based on overheavy firing comprises load control centre loop, steam turbine main control loop and boiler master loop three parts, it is characterized in that:
Described load control centre loop is:
The first deviation computing module (105) be input as actual bed temperature signal with normal bed temperature controlling value, export the first overproof computing module (106) to;
The normal main vapour pressure setting value that is input as generated output value, its output generation generated output correspondence of function generation module (107);
The main vapour pressure setting value that is input as function generation module 107 output of the second deviation computing module (108) and actual main vapour pressure, export the second overproof computing module (109) to;
The output that is input as first, second overproof computing module 106,109 of first control module (104), export multiplier module (103) to;
Multiplier module (103) is gone back the rate of change setting value of input slew rate setting module (102) output;
The output of rate limit blocks (101) input multiplier module (103) and target load setting value setting apparatus AI, output synthetic load setting value.
Described steam turbine main control loop is:
Second fuzzy control model (202) is imported synthetic load setting value respectively and through the synthetic load setting value of first differential module (201) differential;
The 3rd deviation computing module (204) is imported synthetic load setting value and generated output, is exported the second differential module (208) to;
Four, a passage of the 5th, the 6th control module (205,206,207) output, two passages of importing the second differential module (208) are imported the output of the 3rd deviation computing module (204);
The 3rd control module (203) input has the output of second fuzzy control model (202), the 4th, the 5th, the 6th control module (205,206,207), and synthetic load setting value and generated output, output steam turbine master signal.
Described boiler master loop is:
The 4th deviation computing module (301) input synthetic load setting value and generated output export the 3rd, the 5th differential module (302,311) and the 7th control module (303) and the tenth, the 11, the 12 control module (308,309, a 310) passage respectively to;
The 8th control module (305) is imported synthetic load setting value respectively and through the synthetic load setting value of the 4th differential module (304) differential;
The output of addition module (306) input the 7th, the 8th control module (303,305), export the 9th control module (307) to;
Ten, the 11, the 12 control module (308,309,310) also all import the 5th differential module output, export the 9th control module (307) to, the input of the 9th control module (307) also has the measured value and the boiler master setting value of boiler master, output boiler master signal.
Because the rate of change of load instruction has adopted novel restricted version: adopt load to coordinate the fuzzy control loop, the degree that exceeds normal range (NR) according to bed temperature and main vapour pressure progressively strengthens the restriction to load changing rate smoothly, the pace of change of restriction steam turbine pitch instruction is stable to guarantee boiler combustion; Added the fuzzy feedforward control module of load instruction with the actual load signal, the control law of FEEDFORWARD CONTROL module has merged operations staff and expert's experience, sending suitable boiler regulation and control feedforward in boiler master loop FEEDFORWARD CONTROL module by setting value and the actual load deviation of signal of load and rate of change thereof instructs, combine with feedback control module, coordinate control primary air flow, secondary air flow, coal amount; And in the steam turbine master control, in order to make full use of the energy storage of fluidized-bed combustion boiler, also added the fuzzy feedforward control module of load instruction with the actual load signal, control the output of DEH by the demand of load, in order to keep the balance of workload demand and boiler output energy, also add fuzzy bed temperature load in the power fuzzy Self-adjusting PID Control module in the steam turbine master control and coordinated fuzzy control model, fuzzy vapour pressure load coordination fuzzy control model, when bed temperature or main vapour pressure excessive variation occurring, fuzzy load is coordinated fuzzy control model.
Beneficial effect: the utility model can make this class CFB unit steady in a long-termly drop into and coordinate control, unit can satisfy the varying duty rate of electrical network AGC process, the requirement of varying duty scope, keep parameter stabilities such as main vapour pressure, bed temperature in the varying duty process, guarantee unit safety, economical operation.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is large-size circulating fluidized bed (CFB) of the present utility model unit cooperative control system block diagram;
Fig. 2 is a load control centre block diagram in the coordinated control system of the present utility model;
Fig. 3 is a steam turbine master control block diagram in the coordinated control system of the present utility model;
Fig. 4 is a boiler master block diagram in the coordinated control system of the present utility model;
Fig. 5 is the control output diagram that load of the present utility model is coordinated fuzzy controller;
Fig. 6 is the control output diagram of overheavy firing fuzzy feedforward controller of the present utility model.
The specific embodiment:
Be that example comes that the utility model is described in further detail with the 1025t/h CFBB below, referring to Fig. 1 to Fig. 4.This boiler adopts single chamber structure, there is not external heat exchanger, major control loop sets prejudice Fig. 1, it comprises load control centre loop, steam turbine main control loop and boiler master loop three parts based on the circulating fluidized bed unit cooperative control device of overheavy firing.
This example is that platform development comes out with scattered control system (DCS), the control structure that adopts fuzzy feedforward control to combine with the FEEDBACK CONTROL of fuzzy Self-Tuning of PID.
Load of the present utility model control centre loop is referring to Fig. 2.Its major function in New Cycle fluid bed unit cooperative device is close with conventional coordination control: form target load instruction; According to the ability to bear of unit, the rate of change of target load instruction is suitably limited; Unit is participated in the corresponding adjustment of making of the required load instruction of electrical network frequency modulation.
But because the particularity of CFBB, in the varying duty process, in will considering the varying duty process of steam heat force parameter ANOMALOUS VARIATIONS (as vapour pressure etc.), cause the equipment thermal stress ANOMALOUS VARIATIONS, also will consider to keep the stable of stove internal combustion unit load; Therefore to consider that also bed temperature suitably limits the rate of change of target load instruction.In addition because CFBB needs to adjust reposefully burning; And conventional coordinated control system is carried out load changing rate when restriction, adopts vapour pressure abnormal parameters locking load variations more, and this control method can impact to load variations.
Novel unit cooperative control device has adopted novel restricted version for the rate of change of load instruction: add load and coordinate the fuzzy control loop in the coordinated control system load control centre of routine, the degree that exceeds normal range (NR) according to bed temperature and main vapour pressure progressively strengthens the restriction to load changing rate smoothly.
The concrete loop of load control centre is as follows:
The first deviation computing module (105) be input as actual bed temperature signal and normal bed temperature controlling value, it exports the first overproof computing module (106) to;
The normal main vapour pressure setting value that is input as generated output value, its output generation generated output correspondence of function generation module (107);
The main vapour pressure setting value that is input as function generation module 107 output of the second deviation computing module (108) and actual main vapour pressure, it exports the second overproof computing module (109) to;
The output that is input as first, second overproof computing module 106,109 of first control module (104), it exports multiplier module (103) to;
The input of multiplier module (103) also receives the rate of change setting value of rate of change setting module (102) output;
Output, its output of rate limit blocks (101) input multiplier module (103) and target load setting value setting apparatus AI have just formed the synthetic load setting value.
Bed temperature signal is after treatment imported bed temperature deviation computing module 105 respectively with normal bed temperature controlling value, the bed temperature deviation signal that bed temperature deviation computing module calculates is delivered in the overproof computing module 106 of bed temperature scope and is carried out the overproof calculating of bed temperature, the scope that the overproof computing module of scope is provided with normal signal is the dead band, when deviation signal during less than dead zone range, overproof computing module is output as zero, has only the deviation signal of working as greater than dead zone range, overproof computing module output bias signal exceeds the signal of dead zone range degree, delivers to load and coordinates in the passage 1 of fuzzy control model 104.
And generated output produces the normal main Steam Pressure Control of Circulated value of corresponding power via function generation module 107, main vapour pressure signal equally after treatment and normal main Steam Pressure Control of Circulated value are together delivered to main vapour pressure deviation computing module 108, through main vapour pressure deviation computing module, the overproof computing module output carrying out of the main vapour pressure overproof calculating of main vapour pressure, finally exceed the signal of normal range (NR) degree, deliver to load and coordinate in the passage 2 of fuzzy control model 104 by the main vapour pressure of overproof computing module 109 outputs of main vapour pressure.
Load is coordinated the input of fuzzy control model 104 and is received the overproof computing module 106 of bed temperature scope, the overproof computing module 109 of main vapour pressure scope respectively, and multiplier module 103 is received in its output.Coordinate in the fuzzy control model 104 at load, regulation and control requirement according to CFBB, be provided with main vapour pressure and bed temperature and exceed normal range (NR) degree fuzzy regulation rule, when beginning to exceed normal range (NR), just send two signals the regulation and control instruction of restriction load variations, it is serious more to exceed normal range (NR), restriction to load variations is severe more, up to being output as 0, forbids load variations; When main vapour pressure and bed temperature parameter are progressively broken away from the non-normal working scope, regulation and control instruction progressively alleviates the restriction to load variations, when main vapour pressure and bed temperature parameter return to normal range of operation, load is coordinated fuzzy control model and is output as 1, by normal load changing rate regulation and control load, its fuzzy control rule such as Fig. 5.
Rate limit blocks 101, its input are respectively the load obscurity regulation and control rate of change through load setting value after the processing of conventional load control centre and multiplier module 103 outputs.So, unit just can be regulated and control generated output to the power of load command request by load obscurity regulation and control rate of change according to the isoparametric working condition of main vapour pressure and bed temperature in the varying duty process.
The boiler of monoblock cooperative control device and steam turbine main control loop provide the comprehensive control to generating set boiler and steamer, steam turbine main control loop referring to Fig. 3 boiler master loop and Fig. 4, be mainly used in the internal contradictions of coordinating unit generation load and thermic load control, i.e. contradiction between power of the assembling unit response and main vapour pressure are stable.In order to improve the load responding performance, should guarantee to make full use of the accumulation of heat of unit under the stable prerequisite of boiler combustion and thermal procession.Just when load change,, boiler is discharged or absorption portion heat energy, accelerate the response speed of unit disturbance initial stage load by the suitable action of steam turbine pitch.Meanwhile, strengthen the adjusting of boiler side combustion rate, in time recover vapour pressure, Boiler Steam evaporation capacity and unit load are changed adapt.
The thermal inertia of large circulating fluidized bed boiler wants big more than the conventional pulverized-coal stove, the heat storage capacity that large circulating fluidized bed boiler is stronger is beneficial to the load initial communication, but unfavorable factors such as the unit load response speed of delaying causing greatly of combustion system reduces, the main steam pressure fluctuation is big are unfavorable for the sliding pressure operation of Large-scale CFB unit very much.Need the coordination control scheme of routine has been carried out necessary modifications and optimization, must optimize the effect of load instruction fuel control feedforward link.
In New Cycle fluid bed unit cooperative device, adopt fuzzy feedforward control module and fuzzy Self-adjusting PID Control module to finish the generation load of unit and the control scheme of thermic load jointly.Wherein, adopt fuzzy feedforward control, overcome the thermal inertia of CFBC in order to strengthen the burning of boiler; Dynamically delaying of compensation unit, accelerate load responding.In FEEDBACK CONTROL, in order to overcome non-linear in the varying duty process, the PID of routine is modified into the fuzzy Self-adjusting PID Control module, its effect mainly is for the ease of making full use of the boiler heat storage ability, and guarantees that vapour pressure is no more than allowed band.Principle of compositionality is: the load command signal that load control centre sends, export corresponding boiler, steam turbine controlled quentity controlled variable by load instruction fuzzy feedforward control module respectively, deliver to steam turbine master control and boiler master, the control law of FEEDFORWARD CONTROL module merges operations staff and expert's experience, according to the boiler master of different load correspondence in service and the controlled quentity controlled variable of steam turbine master control, and form fuzzy control rule; In boiler master and steam turbine master control, all adopted the fuzzy Self-adjusting PID Control module, to overcome non-linear in the varying duty process.At boiler master, remove and adopt load instruction fuzzy feedforward control module 303, outside the fuzzy Self-adjusting PID Control module, in order to overcome the thermal inertia of CFBC, strengthen the burning of boiler, also added overheavy firing fuzzy feedforward control module 305, the FEEDFORWARD CONTROL module adopt load instruction and actual load signal as input signal, control module is sent suitable boiler overheavy firing by setting value and the actual load deviation of signal of load and rate of change thereof and is instructed, make conditioning unit drop into more coal in earlier stage in advance at application of load, and in later stage of application of load, progressively reduce to increase the speed of coal-supplying amount, when guaranteeing quick application of load, main vapour pressure can superpressure.
Concrete steam turbine main control loop is as follows:
Second fuzzy control model (202) is imported synthetic load setting value respectively and through the synthetic load setting value of first differential module (201) differential;
The 3rd deviation computing module (204) is imported synthetic load setting value and generated output, is exported the second differential module (208) to;
Four, a passage of the 5th, the 6th control module (205,206,207) output, two passages of importing the second differential module (208) are imported the output of the 3rd deviation computing module (204);
The 3rd control module (203) input has the output of second fuzzy control model (202), the 4th, the 5th, the 6th control module (205,206,207), and synthetic load setting value and generated output, output steam turbine master signal.
The steam turbine main control loop mainly constitutes (as Fig. 3) by fuzzy load FEEDFORWARD CONTROL loop, fuzzy Self-Tuning of PID feedback control loop.
In the steam turbine main control loop, slowness for the burning of compensation cycle fluidized-bed combustion boiler, added the fuzzy load FEEDFORWARD CONTROL module 201 of load instruction with the actual load signal, when varying duty, the fuzzy feedforward control module is sent corresponding DEH regulation and control instruction by load instruction and load instruction rate of change, directly adjust the DEH regulation and control instruction by steam turbine master control output and change generated energy, in time the generated energy demand of responsive electricity grid immediately following the burden requirement that load center sends.
In order to overcome non-linear in the varying duty process, the PID of routine is modified into fuzzy Self-adjusting PID Control module 203, the measured value of steam turbine master control is received the fuzzy self-adjusting control module 205 of proportional gain, the fuzzy self-adjusting control module 206 of integral parameter, the fuzzy self-adjusting control module 207 of differential parameter respectively with setting value, the output of parameter fuzzy self-adjusting control module is passed through respectively, the outside proportional gain (P) of PID, integral parameter (I), differential parameter (D) input insert, and realize adjusting P, I, D parameter by each parameter fuzzy self-adjusting control module; Parameter fuzzy self-adjusting control module is provided with proportional gain, the integral parameter of under different settings corresponding different deviations and rate of change thereof, the regulation and control rule of differential parameter separately, when the deviation of set point change or measured value and setting value occurred, proportional gain, integral parameter, the fuzzy self-adjusting control module of differential parameter will be carried out parameter adjustment according to the fuzzy regulation rule.
Concrete boiler master loop is as follows:
The 4th deviation computing module (301) input synthetic load setting value and generated output export the 3rd, the 5th differential module (302,311) and the 7th control module (303) and the tenth, the 11, the 12 control module (308,309, a 310) passage respectively to;
The 8th control module (305) is imported synthetic load setting value respectively and through the synthetic load setting value of the 4th differential module (304) differential;
The output of addition module (306) input the 7th, the 8th control module (303,305), export the 9th control module (307) to;
Ten, the 11, the 12 control module (308,309,310) also all import the 5th differential module output, export the 9th control module (307) to, the input of the 9th control module (307) also has the measured value and the boiler master setting value of boiler master, output boiler master signal.
The formation of fuzzy load FEEDFORWARD CONTROL module: the synthetic load setting value of being calculated by load control centre and generated output are delivered to load deviation computing module 301 respectively and are carried out the generated output deviation and calculate, power deviation is delivered to differential module 302 calculate the load deviation rate of change, then power deviation and rate of change thereof are delivered to overheavy firing FEEDFORWARD CONTROL module 303, so that conditioning unit drops into more coal in earlier stage in advance at application of load, and, progressively reduce to increase the speed of coal-supplying amount in the later stage of application of load; The synthetic load setting value is also delivered to load instruction differential module 304, calculate the rate of change of the strong instruction of load, then load setting value and rate of change thereof are delivered to fuzzy load FEEDFORWARD CONTROL module 305, when varying duty, the fuzzy feedforward control module is sent corresponding combustion control instruction by load instruction and load instruction rate of change.Fuzzy control rule merges operations staff and expert's experience, fuzzy control rule such as Fig. 6: during application of load, after waiting for that the coal that drops into is firing, increase coal-supplying amount, to promote the needed most of coal amount of thermic load in application of load early investment fluid bed internal combustion, to overcome delaying of fluidized bed combustion; Along with the speed of the progressively approaching load instruction progressively reducing to increase of actual load coal-supplying amount, up to zero; So, because application of load drops into more coal in earlier stage in advance, progressively heat release in application of load process thereafter, just can in the application of load process, constantly promote thermic load, improve main vapour pressure, and, progressively reduce to increase the speed of coal-supplying amount in the later stage of application of load, can not allow too much coal actual load near when instruction load also in the stove internal combustion, cause main vapour pressure too high;
Fuzzy load FEEDFORWARD CONTROL module:, added the fuzzy load FEEDFORWARD CONTROL module 305 of load instruction with the actual load signal in order to adjust CFBC reposefully.When varying duty, the fuzzy feedforward control module is sent corresponding combustion control instruction by load instruction and load instruction rate of change, directly change primary air flow, secondary air flow, coal amount by boiler master output, control air quantity, coal amount change the thermic load changes in demand that causes immediately following generated energy, adjust CFBC reposefully, in time adjust fuel quantity, the response generated energy changes corresponding thermic load.
In order to overcome non-linear in the varying duty process, the PID of routine is modified into the fuzzy Self-adjusting PID Control module, the measured value of boiler master is received the fuzzy self-adjusting control module 308 of proportional gain, the fuzzy self-adjusting control module 309 of integral parameter, the fuzzy self-adjusting control module 309 of differential parameter respectively with setting value, the output of parameter fuzzy self-adjusting control module is passed through respectively, the outside proportional gain (P) of PID, integral parameter (I), differential parameter (D) input insert, and realize adjusting P, I, D parameter by each parameter fuzzy self-adjusting control module; Parameter fuzzy self-adjusting control module is provided with proportional gain, the integral parameter of under different settings corresponding different deviations and rate of change thereof, the regulation and control rule of differential parameter separately, when the deviation of set point change or measured value and setting value occurred, proportional gain, integral parameter, the fuzzy self-adjusting control module of differential parameter will be carried out parameter adjustment according to the fuzzy regulation rule.
Claims (3)
1. large circulating fluidized bed unit cooperative control device based on overheavy firing comprises load control centre loop, steam turbine main control loop and boiler master loop three parts, it is characterized in that described load control centre loop is:
The first deviation computing module (105) be input as actual bed temperature signal and normal bed temperature controlling value, it exports the first overproof computing module (106) to;
The normal main vapour pressure setting value that is input as generated output value, its output generation generated output correspondence of function generation module (107);
The main vapour pressure setting value that is input as function generation module 107 output of the second deviation computing module (108) and actual main vapour pressure, it exports the second overproof computing module (109) to;
The output that is input as first, second overproof computing module 106,109 of first control module (104), it exports multiplier module (103) to;
The input of multiplier module (103) also receives the rate of change setting value of rate of change setting module (102) output;
Output, its output of rate limit blocks (101) input multiplier module (103) and target load setting value setting apparatus AI have just formed the synthetic load setting value.
2. the large circulating fluidized bed unit cooperative control device based on overheavy firing according to claim 1 is characterized in that described steam turbine main control loop is:
Second fuzzy control model (202) is imported synthetic load setting value respectively and through the synthetic load setting value of first differential module (201) differential;
The 3rd deviation computing module (204) is imported synthetic load setting value and generated output, is exported the second differential module (208) to;
Four, a passage of the 5th, the 6th control module (205,206,207) output, two passages of importing the second differential module (208) are imported the output of the 3rd deviation computing module (204);
The 3rd control module (203) input has the output of second fuzzy control model (202), the 4th, the 5th, the 6th control module (205,206,207), and synthetic load setting value and generated output, output steam turbine master signal.
3. the large circulating fluidized bed unit cooperative control device based on overheavy firing according to claim 1 is characterized in that described boiler master loop is:
The 4th deviation computing module (301) input synthetic load setting value and generated output export the 3rd, the 5th differential module (302,311) and the 7th control module (303) and the tenth, the 11, the 12 control module (308,309, a 310) passage respectively to;
The 8th control module (305) is imported synthetic load setting value respectively and through the synthetic load setting value of the 4th differential module (304) differential;
The output of addition module (306) input the 7th, the 8th control module (303,305), export the 9th control module (307) to;
Ten, the 11, the 12 control module (308,309,310) also all import the 5th differential module output, export the 9th control module (307) to, the input of the 9th control module (307) also has the measured value and the boiler master setting value of boiler master, output boiler master signal.
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| CN113110631A (en) * | 2021-03-29 | 2021-07-13 | 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 | Main steam pressure control method for thermal power plant |
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| CN105202571A (en) * | 2015-10-20 | 2015-12-30 | 国家电网公司 | Thermal generator set main steam pressure optimization control method |
| CN105202571B (en) * | 2015-10-20 | 2016-10-19 | 国家电网公司 | A kind of thermal power generation unit main vapour pressure optimal control method |
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| CN113110631A (en) * | 2021-03-29 | 2021-07-13 | 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 | Main steam pressure control method for thermal power plant |
| CN113110631B (en) * | 2021-03-29 | 2023-10-24 | 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 | Main steam pressure control method for thermal power plant |
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