CN116792742A - Method and system for monitoring and controlling steam temperature of reheater for thermal power plant - Google Patents
Method and system for monitoring and controlling steam temperature of reheater for thermal power plant Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 239000003245 coal Substances 0.000 claims description 54
- 239000000779 smoke Substances 0.000 claims description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- 230000001276 controlling effect Effects 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000002956 ash Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 12
- 239000010883 coal ash Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 abstract description 4
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of reheater steam temperature control, in particular to a reheater steam temperature monitoring and regulating method and a reheater steam temperature monitoring and regulating system for a thermal power plant, wherein the method comprises the following steps: acquiring rated output data of a boiler of a thermal power plant, and presetting an initial opening value X of a flue baffle of a reheater according to the rated output data; presetting an initial adjustment coefficient A of a flue baffle, wherein A=1; the method comprises the steps of monitoring actual operation data of a boiler of a thermal power plant in real time, and adjusting an initial adjustment coefficient A of a flue baffle according to the actual operation data to obtain a final adjustment coefficient Ae of the flue baffle; and adjusting the initial opening value X of the flue baffle according to the final adjustment coefficient Ae of the flue baffle to obtain the final opening value Xe of the flue baffle. According to the invention, the opening degree of the flue baffle is determined by acquiring the operation state data of the boiler through real-time monitoring, so that the delay influence on the steam temperature of the reheater in different operation states in the operation process of the boiler is avoided, and the accuracy of the opening degree adjustment of the flue baffle and the steam temperature control efficiency of the reheater are improved.
Description
Technical Field
The invention relates to the technical field of reheater steam temperature control, in particular to a reheater steam temperature monitoring and regulating method and a reheater steam temperature monitoring and regulating system for a thermal power plant.
Background
The thermal power generation accounts for more than 70% of the total power generation in China, and the power grid requires a generator set to have a higher load adjustment range and adjustment rate. The generator set participates in primary frequency modulation of the power grid, and the load changes frequently, so that the generator set is more under dynamic working conditions. The quick load change easily causes over-temperature of the superheater and the reheater, the steam temperature fluctuation and the injection of a large amount of desuperheating water influence the economy of the unit, and the thermal efficiency of the unit is seriously reduced.
The control of the opening degree of the flue baffle at the outlet of the superheater/reheater is a main means for controlling the reheat steam temperature, the proportion of flue gas flowing through a flue can be changed by changing the opening degree of the flue baffle, and how to accurately adjust the opening degree of the flue baffle according to the running state of a boiler becomes a new requirement for technical development.
Disclosure of Invention
In view of the above, the invention provides a method and a system for monitoring and controlling the steam temperature of a reheater for a thermal power plant, which mainly aims to solve the problem of accurately adjusting the opening of a flue baffle according to the running state of a boiler.
In one aspect, the invention provides a reheater steam temperature monitoring and controlling method for a thermal power plant, which comprises the following steps:
acquiring rated output data of a boiler of a thermal power plant, and presetting an initial opening value X of a flue baffle of a reheater according to the rated output data;
Presetting an initial adjustment coefficient A of a flue baffle, wherein A=1;
the method comprises the steps of monitoring actual operation data of a boiler of a thermal power plant in real time, and adjusting an initial adjustment coefficient A of a flue baffle according to the actual operation data to obtain a final adjustment coefficient Ae of the flue baffle;
adjusting the initial opening value X of the flue baffle according to the final flue baffle adjustment coefficient Ae to obtain a final opening value Xe of the flue baffle;
the actual operation data includes: the steam temperature of the reheater, the water supply temperature, the hearth outlet smoke flow rate, the coal moisture value, the coal ash value, the coal fines fineness and the turbine vibration intensity.
In some embodiments of the application, when adjusting the initial flue damper adjustment factor a based on actual operating data, it comprises:
acquiring the steam temperature B0 of the reheater and the flue gas temperature C0 of the outlet of the hearth;
presetting a first preset hearth outlet smoke temperature C1, a second preset hearth outlet smoke temperature C2, a third preset hearth outlet smoke temperature C3 and a fourth preset hearth outlet smoke temperature C4, wherein C1 is more than C2 and more than C3 is more than C4; presetting a first preset adjustment coefficient c1, a second preset adjustment coefficient c2, a third preset adjustment coefficient c3 and a fourth preset adjustment coefficient c4, wherein 1.1 is more than c1 and more than c2 is more than 1 and more than c3 and more than c4 is more than 0.9;
When C0 is more than or equal to C1, a first preset adjustment coefficient C1 is selected to adjust the steam temperature B0 of the reheater, and the adjusted steam temperature of the reheater is B0 x C1;
when C1 is more than or equal to C0 and more than C2, selecting a second preset adjustment coefficient C2 to adjust the steam temperature B0 of the reheater, wherein the steam temperature of the reheater after adjustment is B0 x C2;
when C2 is more than or equal to C0 and more than C3, a third preset adjustment coefficient C3 is selected to adjust the steam temperature B0 of the reheater, and the steam temperature of the reheater after adjustment is B0 x C3;
when C3 is more than or equal to C0 and more than C4, a fourth preset adjustment coefficient C4 is selected to adjust the reheater steam temperature B0, and the reheater steam temperature after adjustment is B0 x C4.
In some embodiments of the present application, after the i-th preset adjustment coefficient ci is selected to adjust the reheater steam temperature B0, i=1, 2,3,4, the method further includes:
acquiring a water supply temperature T0, and presetting a highest water supply temperature T1 and a lowest water supply temperature T2;
when T0 is more than T1 or T0 is less than T2, obtaining the flow rate S0 of the flue gas at the outlet of the furnace, and secondarily adjusting the steam temperature B0 ci of the reheater after adjustment according to the flow rate S0 of the flue gas at the outlet of the furnace;
when T1 is more than or equal to T0 and more than or equal to T2, not performing secondary adjustment on the adjusted reheater steam temperature B0 ci;
when the flow speed S0 of the flue gas at the outlet of the furnace is obtained and the adjusted steam temperature B0 ci of the reheater is secondarily adjusted according to the flow speed S0 of the flue gas at the outlet of the furnace, the method comprises the following steps:
Presetting a first preset smoke flow rate value S1, a second preset smoke flow rate value S2, a third preset smoke flow rate value S3 and a fourth preset smoke flow rate value S4, wherein S1 is more than S2 is more than S3 is more than S4; presetting a first preset adjustment coefficient s1, a second preset adjustment coefficient s2, a third preset adjustment coefficient s3 and a fourth preset adjustment coefficient s4, wherein 1.1 is more than s1 and more than s2 is more than 1 and more than s3 and more than s4 is more than 0.9;
when S0 is more than or equal to S1, selecting a first preset adjustment coefficient S1 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 1;
when S1 is more than or equal to S0 and is more than S2, selecting a second preset adjustment coefficient S2 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 2;
when S2 is more than or equal to S0 and more than S3, selecting a third preset adjustment coefficient S3 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 3;
when S3 is more than or equal to S0 and is more than S4, selecting a fourth preset adjustment coefficient S4 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 4;
after selecting the i-th preset adjustment coefficient si to perform secondary adjustment on the adjusted reheater steam temperature B0 x ci, i=1, 2,3,4, and obtaining the reheater steam temperature after secondary adjustment as B0 x ci.
In some embodiments of the present application, after determining whether to make a secondary adjustment to the adjusted reheater steam temperature B0 ci, further includes:
presetting a fire coal influence parameter Y, wherein Y=1;
acquiring a coal water value D0;
presetting a first preset coal moisture value D1, a second preset coal moisture value D2, a third preset coal moisture value D3 and a fourth preset coal moisture value D4, wherein D1 is more than D2 is more than D3 is more than D4; presetting a first preset adjustment coefficient d1, a second preset adjustment coefficient d2, a third preset adjustment coefficient d3 and a fourth preset adjustment coefficient d4, wherein 1.1 is more than d1 and more than d2 is more than 1 and more than d3 and more than d4 is more than 0.9;
when D0 is more than or equal to D1, a first preset adjustment coefficient D1 is selected to adjust the coal-fired influence parameter Y, and the adjusted coal-fired influence parameter is Y D1;
when D1 is more than or equal to D0 and more than D2, a second preset adjustment coefficient D2 is selected to adjust the coal-fired influence parameter Y, wherein the adjusted coal-fired influence parameter is Y D2;
when D2 is more than or equal to D0 and more than D3, a third preset adjustment coefficient D3 is selected to adjust the coal-fired influence parameter Y, wherein the adjusted coal-fired influence parameter is Y D3;
when D3 is more than or equal to D0 and more than D4, a fourth preset adjustment coefficient D4 is selected to adjust the coal-fired influence parameter Y, and the adjusted coal-fired influence parameter is Y D4.
In some embodiments of the present application, after the i-th preset adjustment coefficient di is selected to adjust the fire coal influence parameter Y, i=1, 2,3,4, and the adjusted fire coal influence parameter is obtained as y×di, the method further includes:
acquiring a coal ash value E0;
presetting a first preset ash value E1, a second preset ash value E2, a third preset ash value E3 and a fourth preset ash value E4, wherein E1 is more than E2 and more than E3 is more than E4; presetting a first preset adjustment coefficient e1, a second preset adjustment coefficient e2, a third preset adjustment coefficient e3 and a fourth preset adjustment coefficient e4, wherein 1.1 is more than e1, e2 is more than 1, e3 is more than e4 is more than 0.9;
when E0 is more than or equal to E1, selecting a first preset adjustment coefficient E1 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E1;
when E1 is more than or equal to E0 and more than E2, selecting a second preset adjustment coefficient E2 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E2;
when E2 is more than or equal to E0 and more than E3, selecting a third preset adjustment coefficient E3 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E3;
when E3 is more than or equal to E0 and more than E4, selecting a fourth preset adjustment coefficient E4 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E4.
In some embodiments of the present application, after selecting the i-th preset adjustment coefficient ei to perform secondary adjustment on the adjusted coal-fired impact parameter y×di, i=1, 2,3,4, obtaining the secondary adjusted coal-fired impact parameter y×di×ei, the method further includes:
acquiring fineness H0 of coal-fired pulverized coal;
presetting a first preset coal powder fineness H1, a second preset coal powder fineness H2, a third preset coal powder fineness H3 and a fourth preset coal powder fineness H4, wherein H1 is more than H2 and more than H3 is more than H4; presetting a first preset adjustment coefficient h1, a second preset adjustment coefficient h2, a third preset adjustment coefficient h3 and a fourth preset adjustment coefficient h4, wherein 1.1 is more than h1, h2 is more than h1, h3 is more than h4 is more than 0.9;
when H0 is more than or equal to H1, selecting a first preset adjustment coefficient H1 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di, wherein the secondarily adjusted coal-fired influence parameter is Y di H1;
when H1 is more than or equal to H0 and more than H2, selecting a second preset adjustment coefficient H2 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H2;
when H2 is more than or equal to H0 and more than H3, selecting a third preset adjustment coefficient H3 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H3;
When H3 is more than or equal to H0 and more than H4, selecting a fourth preset adjustment coefficient H4 to perform three adjustments on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H4.
In some embodiments of the present application, after the i-th preset adjustment coefficient hi is selected to perform three adjustments on the secondarily adjusted coal-fired impact parameter y_di_ei, i=1, 2,3,4, obtaining the secondarily adjusted coal-fired impact parameter y_di_ei_hi, the method further includes:
taking the coal-fired influence parameter Y di ei hi after three times of adjustment as a final coal-fired influence parameter Ya;
the reheater steam temperature is regulated for three times according to the final influence parameter Ya of the fire coal, wherein the reheater steam temperature after the three times regulation is B0, si, ya or B0, ya;
presetting a first preset reheater steam temperature B1, a second preset reheater steam temperature B2, a third preset reheater steam temperature B3 and a fourth preset reheater steam temperature B4, wherein B1 is more than B2 is more than B3 is more than B4; presetting a first preset adjustment coefficient b1, a second preset adjustment coefficient b2, a third preset adjustment coefficient b3 and a fourth preset adjustment coefficient b4, wherein b1 is more than 0.9 and less than b2 is more than 1 and less than b3 and less than b4 is more than 1.1;
when (B0 x ci x Ya or B0 x ci x Ya) is equal to or greater than B1, selecting a first preset adjustment coefficient B1 to adjust the initial adjustment coefficient a of the flue damper, wherein the initial adjustment coefficient of the adjusted flue damper is a x B1;
When B1 is more than or equal to (B0 is si is Ya or B0 is ci is Ya) is more than B2, a second preset adjustment coefficient B2 is selected to adjust the initial adjustment coefficient A of the flue baffle, and the initial adjustment coefficient A of the adjusted flue baffle is A B2;
when B2 is more than or equal to (B0 is si is Ya or B0 is ci is Ya) is more than B3, a third preset adjusting coefficient B3 is selected to adjust the initial adjusting coefficient A of the flue baffle, and the initial adjusting coefficient A of the adjusted flue baffle is A is B3;
when B3 is greater than or equal to (B0 x ci x Ya or B0 x ci x Ya) > B4, a fourth preset adjustment coefficient B4 is selected to adjust the initial adjustment coefficient a of the flue damper, and the initial adjustment coefficient of the adjusted flue damper is a x B4.
In some embodiments of the present application, after the i-th preset adjustment coefficient bi is selected to adjust the initial adjustment coefficient a of the flue damper, i=1, 2,3,4, and the adjusted initial adjustment coefficient of the flue damper is a×bi, the method further includes:
acquiring the vibration intensity K0 of the steam turbine;
presetting a first preset vibration intensity K1, a second preset vibration intensity K2, a third preset vibration intensity K3 and a fourth preset vibration intensity K4, wherein K1 is more than K2 and more than K3 is more than K4; presetting a first preset adjustment coefficient k1, a second preset adjustment coefficient k2, a third preset adjustment coefficient k3 and a fourth preset adjustment coefficient k4, wherein k1 is more than 0.9 and less than k2 and less than 1 and k3 and less than 1.1;
When K0 is more than or equal to K1, selecting a first preset adjustment coefficient K1 to carry out secondary adjustment on an adjusted initial adjustment coefficient A of the flue baffle, wherein the initial adjustment coefficient A of the flue baffle after secondary adjustment is A x bi K1;
when K1 is more than or equal to K0 and more than K2, selecting a second preset adjustment coefficient K2 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K2;
when K2 is more than or equal to K0 and more than K3, selecting a third preset adjustment coefficient K3 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K3;
when K3 is more than or equal to K0 and more than K4, selecting a fourth preset adjustment coefficient K4 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K4;
after selecting an i preset adjustment coefficient ki to carry out secondary adjustment on an adjusted initial adjustment coefficient A of the flue baffle, wherein i=1, 2,3 and 4, obtaining the initial adjustment coefficient A of the flue baffle after secondary adjustment as A bi, and taking the initial adjustment coefficient A of the flue baffle after secondary adjustment as a final adjustment coefficient Ae of the flue baffle;
And adjusting the initial opening value X of the flue baffle according to the final flue baffle adjustment coefficient Ae to obtain the final opening value Xe of the flue baffle, wherein Xe=X.Ae.
In another aspect, the application provides a reheater steam temperature monitoring and controlling system for a thermal power plant, which comprises:
the data acquisition unit is used for acquiring rated output data of the boiler of the thermal power plant and monitoring actual operation data of the boiler of the thermal power plant in real time;
the data processing unit is used for presetting an initial opening value X of the flue baffle of the reheater according to rated output data; presetting an initial adjustment coefficient A of a flue baffle, wherein A=1; according to actual operation data, adjusting an initial adjustment coefficient A of the flue baffle to obtain a final adjustment coefficient Ae of the flue baffle; and adjusting the initial opening value X of the flue baffle according to the final adjustment coefficient Ae of the flue baffle to obtain the final opening value Xe of the flue baffle.
In some embodiments of the application, the actual operational data includes: the steam temperature of the reheater, the water supply temperature, the hearth outlet smoke flow rate, the coal moisture value, the coal ash value, the coal fines fineness and the turbine vibration intensity.
Compared with the prior art, the application has the following beneficial effects: according to the application, the initial opening value X of the flue baffle of the reheater is preset according to rated output data of the boiler of the thermal power plant, the initial adjustment coefficient A of the flue baffle is preset, actual operation data of the boiler of the thermal power plant is detected in real time, the initial adjustment coefficient A of the flue baffle is adjusted according to the actual operation data, the final adjustment coefficient Ae of the flue baffle is obtained, the initial opening value X of the flue baffle is adjusted according to the final adjustment coefficient Ae of the flue baffle, the final opening value Xe of the flue baffle is obtained, operation state data of the boiler is obtained through real-time monitoring, the opening of the flue baffle is comprehensively determined according to the operation state data, delay influence on the steam temperature of the reheater in different operation states in the operation process of the boiler is avoided, the accuracy of the opening adjustment of the flue baffle is improved, and further the steam temperature control efficiency of the reheater is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method for monitoring and controlling the steam temperature of a reheater for a thermal power plant according to an embodiment of the present invention;
fig. 2 is a functional block diagram of a reheater steam temperature monitoring and controlling system for a thermal power plant according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, the embodiment provides a method for monitoring and controlling the steam temperature of a reheater for a thermal power plant, which includes:
s101: acquiring rated output data of a boiler of a thermal power plant, and presetting an initial opening value X of a flue baffle of a reheater according to the rated output data;
s102: presetting an initial adjustment coefficient A of a flue baffle, wherein A=1;
s103: the method comprises the steps of monitoring actual operation data of a boiler of a thermal power plant in real time, and adjusting an initial adjustment coefficient A of a flue baffle according to the actual operation data to obtain a final adjustment coefficient Ae of the flue baffle;
s104: and adjusting the initial opening value X of the flue baffle according to the final adjustment coefficient Ae of the flue baffle to obtain the final opening value Xe of the flue baffle.
Specifically, the actual operation data in this embodiment includes: the steam temperature of the reheater, the water supply temperature, the hearth outlet smoke flow rate, the coal moisture value, the coal ash value, the coal fines fineness and the turbine vibration intensity.
It can be understood that in this embodiment, by presetting the initial opening value X of the flue baffle of the reheater and the initial adjustment coefficient a of the flue baffle, actual operation data of the power plant boiler is monitored in real time, and the initial adjustment coefficient a of the flue baffle is adjusted according to the actual operation data, so that accuracy of flue baffle opening adjustment is improved.
In some embodiments of the application, when adjusting the initial flue damper adjustment factor a based on actual operating data, it comprises:
acquiring the steam temperature B0 of the reheater and the flue gas temperature C0 of the outlet of the hearth;
presetting a first preset hearth outlet smoke temperature C1, a second preset hearth outlet smoke temperature C2, a third preset hearth outlet smoke temperature C3 and a fourth preset hearth outlet smoke temperature C4, wherein C1 is more than C2 and more than C3 is more than C4; presetting a first preset adjustment coefficient c1, a second preset adjustment coefficient c2, a third preset adjustment coefficient c3 and a fourth preset adjustment coefficient c4, wherein 1.1 is more than c1 and more than c2 is more than 1 and more than c3 and more than c4 is more than 0.9;
when C0 is more than or equal to C1, a first preset adjustment coefficient C1 is selected to adjust the steam temperature B0 of the reheater, and the adjusted steam temperature of the reheater is B0 x C1;
when C1 is more than or equal to C0 and more than C2, selecting a second preset adjustment coefficient C2 to adjust the steam temperature B0 of the reheater, wherein the steam temperature of the reheater after adjustment is B0 x C2;
when C2 is more than or equal to C0 and more than C3, a third preset adjustment coefficient C3 is selected to adjust the steam temperature B0 of the reheater, and the steam temperature of the reheater after adjustment is B0 x C3;
when C3 is more than or equal to C0 and more than C4, a fourth preset adjustment coefficient C4 is selected to adjust the reheater steam temperature B0, and the reheater steam temperature after adjustment is B0 x C4.
It can be understood that in this embodiment, by acquiring the furnace outlet flue gas temperature C0 and selecting a corresponding adjustment coefficient according to the furnace outlet flue gas temperature C0 to adjust the reheater steam temperature B0, implementation of prediction of the delay effect of the furnace outlet flue gas temperature on the reheater steam temperature is realized, and then the reheater steam temperature data is adjusted in advance, so that accuracy of obtained data is improved.
In some embodiments of the present application, after the i-th preset adjustment coefficient ci is selected to adjust the reheater steam temperature B0, i=1, 2,3,4, the method further includes:
acquiring a water supply temperature T0, and presetting a highest water supply temperature T1 and a lowest water supply temperature T2;
when T0 is more than T1 or T0 is less than T2, obtaining the flow rate S0 of the flue gas at the outlet of the furnace, and secondarily adjusting the steam temperature B0 ci of the reheater after adjustment according to the flow rate S0 of the flue gas at the outlet of the furnace;
when T1 is more than or equal to T0 and more than or equal to T2, not performing secondary adjustment on the adjusted reheater steam temperature B0 ci;
when the flow speed S0 of the flue gas at the outlet of the furnace is obtained and the adjusted steam temperature B0 ci of the reheater is secondarily adjusted according to the flow speed S0 of the flue gas at the outlet of the furnace, the method comprises the following steps:
presetting a first preset smoke flow rate value S1, a second preset smoke flow rate value S2, a third preset smoke flow rate value S3 and a fourth preset smoke flow rate value S4, wherein S1 is more than S2 is more than S3 is more than S4; presetting a first preset adjustment coefficient s1, a second preset adjustment coefficient s2, a third preset adjustment coefficient s3 and a fourth preset adjustment coefficient s4, wherein 1.1 is more than s1 and more than s2 is more than 1 and more than s3 and more than s4 is more than 0.9;
when S0 is more than or equal to S1, selecting a first preset adjustment coefficient S1 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 1;
When S1 is more than or equal to S0 and is more than S2, selecting a second preset adjustment coefficient S2 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 2;
when S2 is more than or equal to S0 and more than S3, selecting a third preset adjustment coefficient S3 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 3;
when S3 is more than or equal to S0 and is more than S4, selecting a fourth preset adjustment coefficient S4 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 4;
after selecting the i-th preset adjustment coefficient si to perform secondary adjustment on the adjusted reheater steam temperature B0 x ci, i=1, 2,3,4, and obtaining the reheater steam temperature after secondary adjustment as B0 x ci.
It can be understood that in this embodiment, whether the reheater steam temperature needs to be secondarily adjusted is determined by the feedwater temperature T0, so that a delay effect caused by a change of the feedwater temperature on the reheater steam temperature is avoided, and after the reheater air temperature needs to be secondarily adjusted is determined, the reheater steam temperature is secondarily adjusted according to the adjustment coefficient selected by the furnace outlet flue gas flow rate S0, so that the data accuracy is further improved.
In some embodiments of the present application, after determining whether to make a secondary adjustment to the adjusted reheater steam temperature B0 ci, further includes:
presetting a fire coal influence parameter Y, wherein Y=1;
acquiring a coal water value D0;
presetting a first preset coal moisture value D1, a second preset coal moisture value D2, a third preset coal moisture value D3 and a fourth preset coal moisture value D4, wherein D1 is more than D2 is more than D3 is more than D4; presetting a first preset adjustment coefficient d1, a second preset adjustment coefficient d2, a third preset adjustment coefficient d3 and a fourth preset adjustment coefficient d4, wherein 1.1 is more than d1 and more than d2 is more than 1 and more than d3 and more than d4 is more than 0.9;
when D0 is more than or equal to D1, a first preset adjustment coefficient D1 is selected to adjust the coal-fired influence parameter Y, and the adjusted coal-fired influence parameter is Y D1;
when D1 is more than or equal to D0 and more than D2, a second preset adjustment coefficient D2 is selected to adjust the coal-fired influence parameter Y, wherein the adjusted coal-fired influence parameter is Y D2;
when D2 is more than or equal to D0 and more than D3, a third preset adjustment coefficient D3 is selected to adjust the coal-fired influence parameter Y, wherein the adjusted coal-fired influence parameter is Y D3;
when D3 is more than or equal to D0 and more than D4, a fourth preset adjustment coefficient D4 is selected to adjust the coal-fired influence parameter Y, and the adjusted coal-fired influence parameter is Y D4.
In some embodiments of the present application, after the i-th preset adjustment coefficient di is selected to adjust the fire coal influence parameter Y, i=1, 2,3,4, and the adjusted fire coal influence parameter is obtained as y×di, the method further includes:
acquiring a coal ash value E0;
presetting a first preset ash value E1, a second preset ash value E2, a third preset ash value E3 and a fourth preset ash value E4, wherein E1 is more than E2 and more than E3 is more than E4; presetting a first preset adjustment coefficient e1, a second preset adjustment coefficient e2, a third preset adjustment coefficient e3 and a fourth preset adjustment coefficient e4, wherein 1.1 is more than e1, e2 is more than 1, e3 is more than e4 is more than 0.9;
when E0 is more than or equal to E1, selecting a first preset adjustment coefficient E1 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E1;
when E1 is more than or equal to E0 and more than E2, selecting a second preset adjustment coefficient E2 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E2;
when E2 is more than or equal to E0 and more than E3, selecting a third preset adjustment coefficient E3 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E3;
when E3 is more than or equal to E0 and more than E4, selecting a fourth preset adjustment coefficient E4 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E4.
In some embodiments of the present application, after selecting the i-th preset adjustment coefficient ei to perform secondary adjustment on the adjusted coal-fired impact parameter y×di, i=1, 2,3,4, obtaining the secondary adjusted coal-fired impact parameter y×di×ei, the method further includes:
acquiring fineness H0 of coal-fired pulverized coal;
presetting a first preset coal powder fineness H1, a second preset coal powder fineness H2, a third preset coal powder fineness H3 and a fourth preset coal powder fineness H4, wherein H1 is more than H2 and more than H3 is more than H4; presetting a first preset adjustment coefficient h1, a second preset adjustment coefficient h2, a third preset adjustment coefficient h3 and a fourth preset adjustment coefficient h4, wherein 1.1 is more than h1, h2 is more than h1, h3 is more than h4 is more than 0.9;
when H0 is more than or equal to H1, selecting a first preset adjustment coefficient H1 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di, wherein the secondarily adjusted coal-fired influence parameter is Y di H1;
when H1 is more than or equal to H0 and more than H2, selecting a second preset adjustment coefficient H2 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H2;
when H2 is more than or equal to H0 and more than H3, selecting a third preset adjustment coefficient H3 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H3;
When H3 is more than or equal to H0 and more than H4, selecting a fourth preset adjustment coefficient H4 to perform three adjustments on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H4.
In some embodiments of the present application, after the i-th preset adjustment coefficient hi is selected to perform three adjustments on the secondarily adjusted coal-fired impact parameter y_di_ei, i=1, 2,3,4, obtaining the secondarily adjusted coal-fired impact parameter y_di_ei_hi, the method further includes:
taking the coal-fired influence parameter Y di ei hi after three times of adjustment as a final coal-fired influence parameter Ya;
the reheater steam temperature is regulated for three times according to the final influence parameter Ya of the fire coal, wherein the reheater steam temperature after the three times regulation is B0, si, ya or B0, ya;
presetting a first preset reheater steam temperature B1, a second preset reheater steam temperature B2, a third preset reheater steam temperature B3 and a fourth preset reheater steam temperature B4, wherein B1 is more than B2 is more than B3 is more than B4; presetting a first preset adjustment coefficient b1, a second preset adjustment coefficient b2, a third preset adjustment coefficient b3 and a fourth preset adjustment coefficient b4, wherein b1 is more than 0.9 and less than b2 is more than 1 and less than b3 and less than b4 is more than 1.1;
when (B0 x ci x Ya or B0 x ci x Ya) is equal to or greater than B1, selecting a first preset adjustment coefficient B1 to adjust the initial adjustment coefficient a of the flue damper, wherein the initial adjustment coefficient of the adjusted flue damper is a x B1;
When B1 is more than or equal to (B0 is si is Ya or B0 is ci is Ya) is more than B2, a second preset adjustment coefficient B2 is selected to adjust the initial adjustment coefficient A of the flue baffle, and the initial adjustment coefficient A of the adjusted flue baffle is A B2;
when B2 is more than or equal to (B0 is si is Ya or B0 is ci is Ya) is more than B3, a third preset adjusting coefficient B3 is selected to adjust the initial adjusting coefficient A of the flue baffle, and the initial adjusting coefficient A of the adjusted flue baffle is A is B3;
when B3 is greater than or equal to (B0 x ci x Ya or B0 x ci x Ya) > B4, a fourth preset adjustment coefficient B4 is selected to adjust the initial adjustment coefficient a of the flue damper, and the initial adjustment coefficient of the adjusted flue damper is a x B4.
It can be understood that in this embodiment, the coal-fired influencing parameter is determined by acquiring the moisture, ash and coal fines fineness data of the coal, and then the reheater steam temperature is adjusted for three times by the coal-fired influencing parameter, so that the influence on the reheater steam temperature caused by different coal-fired conditions is avoided, and the data accuracy is further improved.
In some embodiments of the present application, after the i-th preset adjustment coefficient bi is selected to adjust the initial adjustment coefficient a of the flue damper, i=1, 2,3,4, and the adjusted initial adjustment coefficient of the flue damper is a×bi, the method further includes:
Acquiring the vibration intensity K0 of the steam turbine;
presetting a first preset vibration intensity K1, a second preset vibration intensity K2, a third preset vibration intensity K3 and a fourth preset vibration intensity K4, wherein K1 is more than K2 and more than K3 is more than K4; presetting a first preset adjustment coefficient k1, a second preset adjustment coefficient k2, a third preset adjustment coefficient k3 and a fourth preset adjustment coefficient k4, wherein k1 is more than 0.9 and less than k2 and less than 1 and k3 and less than 1.1;
when K0 is more than or equal to K1, selecting a first preset adjustment coefficient K1 to carry out secondary adjustment on an adjusted initial adjustment coefficient A of the flue baffle, wherein the initial adjustment coefficient A of the flue baffle after secondary adjustment is A x bi K1;
when K1 is more than or equal to K0 and more than K2, selecting a second preset adjustment coefficient K2 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K2;
when K2 is more than or equal to K0 and more than K3, selecting a third preset adjustment coefficient K3 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K3;
when K3 is more than or equal to K0 and more than K4, selecting a fourth preset adjustment coefficient K4 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K4;
After selecting an i preset adjustment coefficient ki to carry out secondary adjustment on an adjusted initial adjustment coefficient A of the flue baffle, wherein i=1, 2,3 and 4, obtaining the initial adjustment coefficient A of the flue baffle after secondary adjustment as A bi, and taking the initial adjustment coefficient A of the flue baffle after secondary adjustment as a final adjustment coefficient Ae of the flue baffle;
and adjusting the initial opening value X of the flue baffle according to the final flue baffle adjustment coefficient Ae to obtain the final opening value Xe of the flue baffle, wherein Xe=X.Ae.
It can be understood that in this embodiment, the vibration intensity data of the steam turbine is also obtained, and the adjusted initial adjustment coefficient of the flue baffle is secondarily adjusted by selecting the corresponding adjustment coefficient according to the vibration intensity data of the steam turbine, and because the steam temperature of the reheater is too high, the steam turbine equipment is affected, and the equipment deforms and vibrates, so that the initial adjustment coefficient of the flue baffle is secondarily adjusted according to the vibration intensity of the steam turbine.
In another aspect, the invention provides a reheater steam temperature monitoring and controlling system for a thermal power plant, which comprises:
the data acquisition unit is used for acquiring rated output data of the boiler of the thermal power plant and monitoring actual operation data of the boiler of the thermal power plant in real time;
The data processing unit is used for presetting an initial opening value X of the flue baffle of the reheater according to rated output data; presetting an initial adjustment coefficient A of a flue baffle, wherein A=1; according to actual operation data, adjusting an initial adjustment coefficient A of the flue baffle to obtain a final adjustment coefficient Ae of the flue baffle; and adjusting the initial opening value X of the flue baffle according to the final adjustment coefficient Ae of the flue baffle to obtain the final opening value Xe of the flue baffle.
In some embodiments of the application, the actual operational data includes: the steam temperature of the reheater, the water supply temperature, the hearth outlet smoke flow rate, the coal moisture value, the coal ash value, the coal fines fineness and the turbine vibration intensity.
According to the embodiment, the operation state data of the boiler is obtained through real-time monitoring, the opening of the flue baffle is comprehensively determined according to the operation state data, the delay influence on the steam temperature of the reheater in different operation states in the operation process of the boiler is avoided, the accuracy of the opening adjustment of the flue baffle is improved, and then the steam temperature control efficiency of the reheater is improved.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (10)
1. A reheater steam temperature monitoring and controlling method for a thermal power plant is characterized by comprising the following steps:
acquiring rated output data of a boiler of a thermal power plant, and presetting an initial opening value X of a flue baffle of a reheater according to the rated output data;
Presetting an initial adjustment coefficient A of a flue baffle, wherein A=1;
the method comprises the steps of monitoring actual operation data of a boiler of a thermal power plant in real time, and adjusting an initial adjustment coefficient A of a flue baffle according to the actual operation data to obtain a final adjustment coefficient Ae of the flue baffle;
adjusting the initial opening value X of the flue baffle according to the final flue baffle adjustment coefficient Ae to obtain a final opening value Xe of the flue baffle;
the actual operation data includes: the steam temperature of the reheater, the water supply temperature, the hearth outlet smoke flow rate, the coal moisture value, the coal ash value, the coal fines fineness and the turbine vibration intensity.
2. The method for monitoring and controlling the steam temperature of a reheater for a thermal power plant according to claim 1, wherein when adjusting the initial adjustment coefficient a of the flue damper according to the actual operation data, comprising:
acquiring the steam temperature B0 of the reheater and the flue gas temperature C0 of the outlet of the hearth;
presetting a first preset hearth outlet smoke temperature C1, a second preset hearth outlet smoke temperature C2, a third preset hearth outlet smoke temperature C3 and a fourth preset hearth outlet smoke temperature C4, wherein C1 is more than C2 and more than C3 is more than C4; presetting a first preset adjustment coefficient c1, a second preset adjustment coefficient c2, a third preset adjustment coefficient c3 and a fourth preset adjustment coefficient c4, wherein 1.1 is more than c1 and more than c2 is more than 1 and more than c3 and more than c4 is more than 0.9;
When C0 is more than or equal to C1, a first preset adjustment coefficient C1 is selected to adjust the steam temperature B0 of the reheater, and the adjusted steam temperature of the reheater is B0 x C1;
when C1 is more than or equal to C0 and more than C2, selecting a second preset adjustment coefficient C2 to adjust the steam temperature B0 of the reheater, wherein the steam temperature of the reheater after adjustment is B0 x C2;
when C2 is more than or equal to C0 and more than C3, a third preset adjustment coefficient C3 is selected to adjust the steam temperature B0 of the reheater, and the steam temperature of the reheater after adjustment is B0 x C3;
when C3 is more than or equal to C0 and more than C4, a fourth preset adjustment coefficient C4 is selected to adjust the reheater steam temperature B0, and the reheater steam temperature after adjustment is B0 x C4.
3. The method for monitoring and controlling the reheater steam temperature for a thermal power plant according to claim 2, wherein, after selecting an i-th preset adjustment coefficient ci to adjust the reheater steam temperature B0, i=1, 2,3,4, obtaining an adjusted reheater steam temperature B0 x ci, further comprising:
acquiring a water supply temperature T0, and presetting a highest water supply temperature T1 and a lowest water supply temperature T2;
when T0 is more than T1 or T0 is less than T2, obtaining the flow rate S0 of the flue gas at the outlet of the furnace, and secondarily adjusting the steam temperature B0 ci of the reheater after adjustment according to the flow rate S0 of the flue gas at the outlet of the furnace;
when T1 is more than or equal to T0 and more than or equal to T2, not performing secondary adjustment on the adjusted reheater steam temperature B0 ci;
When the flow speed S0 of the flue gas at the outlet of the furnace is obtained and the adjusted steam temperature B0 ci of the reheater is secondarily adjusted according to the flow speed S0 of the flue gas at the outlet of the furnace, the method comprises the following steps:
presetting a first preset smoke flow rate value S1, a second preset smoke flow rate value S2, a third preset smoke flow rate value S3 and a fourth preset smoke flow rate value S4, wherein S1 is more than S2 is more than S3 is more than S4; presetting a first preset adjustment coefficient s1, a second preset adjustment coefficient s2, a third preset adjustment coefficient s3 and a fourth preset adjustment coefficient s4, wherein 1.1 is more than s1 and more than s2 is more than 1 and more than s3 and more than s4 is more than 0.9;
when S0 is more than or equal to S1, selecting a first preset adjustment coefficient S1 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 1;
when S1 is more than or equal to S0 and is more than S2, selecting a second preset adjustment coefficient S2 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 2;
when S2 is more than or equal to S0 and more than S3, selecting a third preset adjustment coefficient S3 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 3;
when S3 is more than or equal to S0 and is more than S4, selecting a fourth preset adjustment coefficient S4 to carry out secondary adjustment on the adjusted reheater steam temperature B0 ci, wherein the reheater steam temperature after secondary adjustment is B0 ci 4;
After selecting the i-th preset adjustment coefficient si to perform secondary adjustment on the adjusted reheater steam temperature B0 x ci, i=1, 2,3,4, and obtaining the reheater steam temperature after secondary adjustment as B0 x ci.
4. The method for monitoring and controlling the reheater steam temperature for a thermal power plant according to claim 3, further comprising, after determining whether to perform secondary adjustment of the adjusted reheater steam temperature B0 ci:
presetting a fire coal influence parameter Y, wherein Y=1;
acquiring a coal water value D0;
presetting a first preset coal moisture value D1, a second preset coal moisture value D2, a third preset coal moisture value D3 and a fourth preset coal moisture value D4, wherein D1 is more than D2 is more than D3 is more than D4; presetting a first preset adjustment coefficient d1, a second preset adjustment coefficient d2, a third preset adjustment coefficient d3 and a fourth preset adjustment coefficient d4, wherein 1.1 is more than d1 and more than d2 is more than 1 and more than d3 and more than d4 is more than 0.9;
when D0 is more than or equal to D1, a first preset adjustment coefficient D1 is selected to adjust the coal-fired influence parameter Y, and the adjusted coal-fired influence parameter is Y D1;
when D1 is more than or equal to D0 and more than D2, a second preset adjustment coefficient D2 is selected to adjust the coal-fired influence parameter Y, wherein the adjusted coal-fired influence parameter is Y D2;
when D2 is more than or equal to D0 and more than D3, a third preset adjustment coefficient D3 is selected to adjust the coal-fired influence parameter Y, wherein the adjusted coal-fired influence parameter is Y D3;
When D3 is more than or equal to D0 and more than D4, a fourth preset adjustment coefficient D4 is selected to adjust the coal-fired influence parameter Y, and the adjusted coal-fired influence parameter is Y D4.
5. The method for monitoring and controlling the steam temperature of a reheater for a thermal power plant according to claim 4, wherein after the i-th preset adjustment coefficient di is selected to adjust the coal-fired influence parameter Y, i=1, 2,3,4, the adjusted coal-fired influence parameter is obtained as y×di, the method further comprises:
acquiring a coal ash value E0;
presetting a first preset ash value E1, a second preset ash value E2, a third preset ash value E3 and a fourth preset ash value E4, wherein E1 is more than E2 and more than E3 is more than E4; presetting a first preset adjustment coefficient e1, a second preset adjustment coefficient e2, a third preset adjustment coefficient e3 and a fourth preset adjustment coefficient e4, wherein 1.1 is more than e1, e2 is more than 1, e3 is more than e4 is more than 0.9;
when E0 is more than or equal to E1, selecting a first preset adjustment coefficient E1 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E1;
when E1 is more than or equal to E0 and more than E2, selecting a second preset adjustment coefficient E2 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E2;
When E2 is more than or equal to E0 and more than E3, selecting a third preset adjustment coefficient E3 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E3;
when E3 is more than or equal to E0 and more than E4, selecting a fourth preset adjustment coefficient E4 to carry out secondary adjustment on the adjusted coal-fired influence parameter Y di, wherein the coal-fired influence parameter after secondary adjustment is Y di E4.
6. The method for monitoring and controlling the steam temperature of a reheater for a thermal power plant according to claim 5, wherein after the i-th preset adjustment coefficient ei is selected to perform secondary adjustment on the adjusted coal-fired influence parameter y×di, i=1, 2,3,4, obtaining the secondary-adjusted coal-fired influence parameter y×di×ei, the method further comprises:
acquiring fineness H0 of coal-fired pulverized coal;
presetting a first preset coal powder fineness H1, a second preset coal powder fineness H2, a third preset coal powder fineness H3 and a fourth preset coal powder fineness H4, wherein H1 is more than H2 and more than H3 is more than H4; presetting a first preset adjustment coefficient h1, a second preset adjustment coefficient h2, a third preset adjustment coefficient h3 and a fourth preset adjustment coefficient h4, wherein 1.1 is more than h1, h2 is more than h1, h3 is more than h4 is more than 0.9;
when H0 is more than or equal to H1, selecting a first preset adjustment coefficient H1 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di, wherein the secondarily adjusted coal-fired influence parameter is Y di H1;
When H1 is more than or equal to H0 and more than H2, selecting a second preset adjustment coefficient H2 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H2;
when H2 is more than or equal to H0 and more than H3, selecting a third preset adjustment coefficient H3 to perform three times of adjustment on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H3;
when H3 is more than or equal to H0 and more than H4, selecting a fourth preset adjustment coefficient H4 to perform three adjustments on the secondarily adjusted coal-fired influence parameter Y di ei, wherein the secondarily adjusted coal-fired influence parameter is Y di ei H4.
7. The method for monitoring and controlling the steam temperature of a reheater for a thermal power plant according to claim 6, wherein after the i-th preset adjustment coefficient hi is selected to perform three adjustments on the secondarily adjusted coal-fired influence parameter y_di_ei, i=1, 2,3,4, the method further comprises, after obtaining the secondarily adjusted coal-fired influence parameter y_di_ei_hi:
taking the coal-fired influence parameter Y di ei hi after three times of adjustment as a final coal-fired influence parameter Ya;
the reheater steam temperature is regulated for three times according to the final influence parameter Ya of the fire coal, wherein the reheater steam temperature after the three times regulation is B0, si, ya or B0, ya;
Presetting a first preset reheater steam temperature B1, a second preset reheater steam temperature B2, a third preset reheater steam temperature B3 and a fourth preset reheater steam temperature B4, wherein B1 is more than B2 is more than B3 is more than B4; presetting a first preset adjustment coefficient b1, a second preset adjustment coefficient b2, a third preset adjustment coefficient b3 and a fourth preset adjustment coefficient b4, wherein b1 is more than 0.9 and less than b2 is more than 1 and less than b3 and less than b4 is more than 1.1;
when (B0 x ci x Ya or B0 x ci x Ya) is equal to or greater than B1, selecting a first preset adjustment coefficient B1 to adjust the initial adjustment coefficient a of the flue damper, wherein the initial adjustment coefficient of the adjusted flue damper is a x B1;
when B1 is more than or equal to (B0 is si is Ya or B0 is ci is Ya) is more than B2, a second preset adjustment coefficient B2 is selected to adjust the initial adjustment coefficient A of the flue baffle, and the initial adjustment coefficient A of the adjusted flue baffle is A B2;
when B2 is more than or equal to (B0 is si is Ya or B0 is ci is Ya) is more than B3, a third preset adjusting coefficient B3 is selected to adjust the initial adjusting coefficient A of the flue baffle, and the initial adjusting coefficient A of the adjusted flue baffle is A is B3;
when B3 is greater than or equal to (B0 x ci x Ya or B0 x ci x Ya) > B4, a fourth preset adjustment coefficient B4 is selected to adjust the initial adjustment coefficient a of the flue damper, and the initial adjustment coefficient of the adjusted flue damper is a x B4.
8. The method for monitoring and controlling the steam temperature of a reheater for a thermal power plant according to claim 7, wherein after the i-th preset adjustment coefficient bi is selected to adjust the initial adjustment coefficient a of the flue damper, i=1, 2,3,4, the adjusted initial adjustment coefficient of the flue damper is a×bi, the method further comprises:
acquiring the vibration intensity K0 of the steam turbine;
presetting a first preset vibration intensity K1, a second preset vibration intensity K2, a third preset vibration intensity K3 and a fourth preset vibration intensity K4, wherein K1 is more than K2 and more than K3 is more than K4; presetting a first preset adjustment coefficient k1, a second preset adjustment coefficient k2, a third preset adjustment coefficient k3 and a fourth preset adjustment coefficient k4, wherein k1 is more than 0.9 and less than k2 and less than 1 and k3 and less than 1.1;
when K0 is more than or equal to K1, selecting a first preset adjustment coefficient K1 to carry out secondary adjustment on an adjusted initial adjustment coefficient A of the flue baffle, wherein the initial adjustment coefficient A of the flue baffle after secondary adjustment is A x bi K1;
when K1 is more than or equal to K0 and more than K2, selecting a second preset adjustment coefficient K2 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K2;
when K2 is more than or equal to K0 and more than K3, selecting a third preset adjustment coefficient K3 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K3;
When K3 is more than or equal to K0 and more than K4, selecting a fourth preset adjustment coefficient K4 to carry out secondary adjustment on the adjusted initial adjustment coefficient A x bi of the flue baffle, wherein the initial adjustment coefficient A x bi of the flue baffle after secondary adjustment is A x K4;
after selecting an i preset adjustment coefficient ki to carry out secondary adjustment on an adjusted initial adjustment coefficient A of the flue baffle, wherein i=1, 2,3 and 4, obtaining the initial adjustment coefficient A of the flue baffle after secondary adjustment as A bi, and taking the initial adjustment coefficient A of the flue baffle after secondary adjustment as a final adjustment coefficient Ae of the flue baffle;
and adjusting the initial opening value X of the flue baffle according to the final flue baffle adjustment coefficient Ae to obtain the final opening value Xe of the flue baffle, wherein Xe=X.Ae.
9. A reheater steam temperature monitoring and controlling system for a thermal power plant, characterized in that the method for monitoring and controlling the reheater steam temperature for the thermal power plant according to any one of claims 1 to 8 is applied, comprising:
the data acquisition unit is used for acquiring rated output data of the boiler of the thermal power plant and monitoring actual operation data of the boiler of the thermal power plant in real time;
the data processing unit is used for presetting an initial opening value X of the flue baffle of the reheater according to the rated output data; presetting an initial adjustment coefficient A of a flue baffle, wherein A=1; adjusting an initial adjustment coefficient A of the flue baffle according to the actual operation data to obtain a final adjustment coefficient Ae of the flue baffle; and adjusting the initial opening value X of the flue baffle according to the final adjustment coefficient Ae of the flue baffle to obtain the final opening value Xe of the flue baffle.
10. The reheater steam temperature monitoring and control system for a thermal power plant according to claim 9, wherein said actual operation data includes: the steam temperature of the reheater, the water supply temperature, the hearth outlet smoke flow rate, the coal moisture value, the coal ash value, the coal fines fineness and the turbine vibration intensity.
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| CN202310641904.1A CN116792742A (en) | 2023-05-31 | 2023-05-31 | Method and system for monitoring and controlling steam temperature of reheater for thermal power plant |
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