CN102662318A - Coal supply method of optimizing fire power plant by real-time coal firing heat value coefficient - Google Patents
Coal supply method of optimizing fire power plant by real-time coal firing heat value coefficient Download PDFInfo
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- CN102662318A CN102662318A CN2012101671413A CN201210167141A CN102662318A CN 102662318 A CN102662318 A CN 102662318A CN 2012101671413 A CN2012101671413 A CN 2012101671413A CN 201210167141 A CN201210167141 A CN 201210167141A CN 102662318 A CN102662318 A CN 102662318A
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Abstract
The invention relates to a coal supply method of optimizing a fire power plant by real-time coal firing heat value coefficient. The method includes monitoring various main parameters of a running unit in a certain time, multiplying and dividing relevant variable integral to obtain a dimensionless coefficient which can directly indicate relative capacity of real-time coal-fired heating quantity of the unit and provide operation basis for adjustment and control of an automatic power generation unit. By the coal supply method, an expensive coal-quality online analyzer can be substituted, online computing of real-time coal-fired heating quantity of the power generation unit is realized, and a coat-fired heating value coefficient is obtained. The coat-fired heating value coefficient can indicate data relation between real-time coal-fired heating quantity and designed value, which on one hand, can provide running references for monitors and can provide important operation data for an automatic power generation control system on the other hand. The coal supply method realizes real-time load adjustment of the unit and provides important insurance for safe and stable running of the unit and high-efficient peak pitching and frequency modulation of the power grid.
Description
Technical field
The invention belongs to electricity generation system machine unit automatic generation control technology field, what be specifically related to is a kind of method that adopts the coal supply of real-time coal-fired calorific value Coefficient Optimization firepower power station.
Background technology
The coal-fired ature of coal of genset is that all fuel-burning power plant need the important parameter of monitoring in real time; But the present utilizable ature of coal in-line analyzer that has only; It can provide with reference to calorific value and coal-fired composition, but for the coordinated control system that realizes Automatic Generation Control (AGC), can only reference be provided for the operations staff; Because of result of laboratory test can not in time reflect the current stove ature of coal of going into; So can not this result be participated in the middle of the actual set peak-frequency regulation, practical value is limited, so a lot of expert studies in the on-line calculation method to the ature of coal coefficient.
For genset AGC system; Go into the stove ature of coal and be directly connected to the coal-supplying amount of the corresponding unit of unit load; Its variable effect the balance between unit thermal value and the external load; According to the thermal value of design coal, utilize the coal-fired heat that produces of reality constantly to revise and compensate at present, make the coal-fired heat that is discharged and the institute's energy requirement that generates electricity reach a kind of mobile equilibrium at last.But all generating plant come the coal class various; The heat difference of various atures of coal is very big, causes to get into unit fuel value frequent variations and irregular, calculates if rely on conventional method to carry out ature of coal; Only during set steady, calculate just with practical value; And can only be rough calculation for the calculating during the unit lifting load, and not reaching accurate Calculation, the result who obtains does not at last have practical value yet.Through retrieval, also do not find and the akin publication document of the inventive method at present.
Summary of the invention
The objective of the invention is to overcome the prior art deficiency, lack reflection heat output of fuel parameter in real time in the generation current unit AGC control system, and the present invention can provide a kind of method that adopts the coal supply of real-time coal-fired calorific value Coefficient Optimization firepower power station.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of method that adopts the coal supply of real-time coal-fired calorific value Coefficient Optimization firepower power station, its step is following:
⑴ confirm the time interval: behind the genset working stability, getting a certain moment is timing starting point 0, gets t and is timing end point after the time, confirms that period t is as the period of calculating coal-fired calorific value coefficient of colligation;
⑵ the variable numerical value in the continuous recording period t:, make the variable curve in the period t to the genset real time record power MW behind the working stability, fuel quantity T, three variablees of genset drum pressure P;
⑶ derive the fuel quantity of specific power in the period t: at first add up out genset realtime power MW, fuel quantity T, the total amount in period t, i.e. A=∫
0 tMW and B=∫
0 tT draws the fuel quantity Q=B/A of genset specific power in the period t then;
⑷ derive coal-fired calorific value original coefficient K: the fuel quantity of setting the genset specific power is Q
0, Q
0Be the mean value of this genset historical record Q value, calculate coal-fired calorific value original coefficient K=Q/Q
0
⑸ derive the conversion constant C:C=(C of pressure and ature of coal
0-P
t)/(C
0-P
0), P wherein
0Be initial timing genset drum pressure value, P
tBe t genset drum pressure value constantly, C
0Be the pressure correction constant, this constant draws for test;
⑹ obtain the coal-fired calorific value coefficient of colligation K '=K * C after the pressure correction;
⑺ draw the real-time best coal-supplying amount=K ' of genset * former coal-supplying amount of genset.
And, genset test gained pressure correction constant C among the above-mentioned steps ⑸
0Test to obtain step following:
⑴ the starting condition of determination test is: the generation load of genset is 250MW, and the genset drum pressure is 16MPa, and genset operation fuel quantity is 125 tons/hour, and the duration of test ature of coal remains unchanged;
⑵ the end condition of determination test is: the generation load of genset is 250MW, and the genset drum pressure is 17MPa, and genset operation fuel quantity is 125 tons/hour;
⑶ after known generators group drum pressure is changed to 1MPa; Draw the conversion constant C of pressure and ature of coal through the calculating generator group coal consumption that disappears: recording genset, to carry out the transition to end condition transit time gradually by starting condition be 4 hours; Increase continuously fuel quantity in the transition period and amount to 40 tons, calculate conversion constant C=(125 tons/hour * 4 hours)/(40 tons+125 tons/hour * 4 hours)=0.93 of pressure and ature of coal;
⑷ calculating pressure correction constant C
0Value: utilize formula C=(C
0-P
t)/(C
0-P
0) calculate, wherein: C=0.93, P
0=16, P
t=17, draw the pressure correction constant C
0=29.5.
Advantage of the present invention and good effect are:
1, this method can substitute expensive ature of coal online analytical instrument, realize the coal-fired thermal value in real time of genset in line computation, for the operations staff provides reference frame.
2, real-time thermal value of fire coal and design load are compared, draw coal-fired calorific value coefficient of colligation, for the computing of Automatic Generation Control AGC system provides significant data.
3, the present invention has realized real-time participation genset Load Regulation, for unit safety stable operation and the efficient peak-frequency regulation of electrical network provide important assurance.
Description of drawings
Fig. 1 is realtime power MW of the present invention, fuel quantity T, three variablees of genset drum pressure P begin 0 to time t from timing a variable curve map.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the present invention is done further detailed description,
Embodiment 1:
A kind of method that adopts the coal supply of real-time coal-fired calorific value Coefficient Optimization firepower power station, concrete steps are following:
⑴ confirm the time interval: behind the genset working stability, getting a certain moment is timing starting point 0, gets t and is timing end point after the time, confirms that period t is as the period of calculating coal-fired calorific value coefficient of colligation;
⑵ the variable numerical value in the continuous recording period t:, make the variable curve in the period t to the genset real time record power MW behind the working stability, fuel quantity T, three variablees of genset drum pressure P;
⑶ derive the fuel quantity of specific power in the period t: at first add up out genset realtime power MW, fuel quantity T, the total amount in period t, i.e. A=∫
0 tMW and B=∫
0 tT draws the fuel quantity Q=B/A of genset specific power in the period t then;
⑷ derive coal-fired calorific value original coefficient K: the fuel quantity of setting the genset specific power is Q
0, Q
0Be the mean value of this genset historical record Q value, calculate coal-fired calorific value original coefficient K=Q/Q
0
⑸ derive the conversion constant C:C=(C of pressure and ature of coal
0-P
t)/(C
0-P
0), P wherein
0Be initial timing genset drum pressure value, P
tBe t genset drum pressure value constantly, C
0Be the pressure correction constant, this constant draws C in the present embodiment for test
0Test obtain step and be:
1. the starting condition of determination test is: the generation load of genset is 250MW, and the genset drum pressure is 16MPa, and genset operation fuel quantity is 125 tons/hour, and the duration of test ature of coal remains unchanged;
2. the end condition of determination test is: the generation load of genset is 250MW, and the genset drum pressure is 17MPa, and genset operation fuel quantity is 125 tons/hour;
3. after known generators group drum pressure is changed to 1MPa; Draw the conversion constant C of pressure and ature of coal through the calculating generator group coal consumption that disappears: recording genset, to carry out the transition to end condition transit time gradually by starting condition be 4 hours; Increase continuously fuel quantity in the transition period and amount to 40 tons, calculate conversion constant C=(125 tons/hour * 4 hours)/(40 tons+125 tons/hour * 4 hours)=0.93 of pressure and ature of coal;
4. calculating pressure correction constant C
0Value: utilize formula C=(C
0-P
t)/(C
0-P
0) calculate, wherein: C=0.93, P
0=16, P
t=17, draw the pressure correction constant C
0=29.5.
⑹ obtain the coal-fired calorific value coefficient of colligation K '=K * C after the pressure correction;
⑺ draw the real-time best coal-supplying amount=K ' of genset * former coal-supplying amount of genset.
Embodiment 2:
The conversion constant C of calculating pressure and ature of coal in the present embodiment; C=(C
0-P
t)/(C
0-P
0), P wherein
0, P
tForce value can replace genset drum pressure value by the main steam pressure value.Because the variation characteristic of the variation of main steam pressure and genset drum pressure is approximate, the deviation that both calculate can be ignored.
So, pressure correction constant C in the present embodiment
0Test obtain and can also replace genset drum pressure value obtain through the main steam pressure value:
⑴ the starting condition of determination test is: the generation load of genset is 250MW, and main steam pressure is 16MPa, and genset operation fuel quantity is 125 tons/hour, and the duration of test ature of coal remains unchanged;
⑵ the end condition of determination test is: the generation load of genset is 250MW, and main steam pressure is 17MPa, and genset operation fuel quantity is 125 tons/hour;
⑶ test draws the conversion constant C of pressure and ature of coal: recording genset, to carry out the transition to end condition transit time gradually by starting condition be 4 hours; Increase continuously fuel quantity in the transition period and amount to 40 tons, calculate conversion constant C=(125 tons/hour * 4 hours)/(40 tons+125 tons/hour * 4 hours)=0.93 of pressure and ature of coal;
⑷ calculating pressure correction constant C
0Value; Utilize formula C=(C
0-P
t)/(C
0-P
0) calculate, wherein: C=0.93, P
0=16, P
t=17, draw the pressure correction constant C
0=29.5.
The operation result of instantiation:
With the 300MW unit is example, after application the inventive method, and the main steam pressure smooth change; The desuperheat injection flow rate reduces more than 15%, improves burning efficiency and is equivalent to improve main vapour pressure 0.5MPa under the same operating condition, reduces coal consumption 0.149g/KWh according to every raising 0.1MPa; Annual calculate according to 1,800,000,000 KWh generated energy, standard coal equivalent is according to 350 yuan/ton, and then 1 year direct economic benefit is 0.5 * 0.149 gram/kilowatt hour * 1,800,000,000 kilowatt hours * 0.000001 ton/restrain * 350 yuan/ton=46935 yuan; Calculate annual nearly 50,000 yuan of the economic loss that reduces of separate unit unit in this way.
It is emphasized that; Embodiment of the present invention is illustrative; Rather than it is determinate; Therefore the present invention is not limited to the embodiment described in the embodiment, and every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention belong to the scope that the present invention protects equally.
Claims (2)
1. method that adopts the coal supply of real-time coal-fired calorific value Coefficient Optimization firepower power station, it is characterized in that: step is following:
⑴ confirm the time interval: behind the genset working stability, getting a certain moment is timing starting point 0, gets t and is timing end point after the time, confirms that period t is as the period of calculating coal-fired calorific value coefficient of colligation;
⑵ the variable numerical value in the continuous recording period t:, make the variable curve in the period t to the genset real time record power MW behind the working stability, fuel quantity T, three variablees of genset drum pressure P;
⑶ derive the fuel quantity of specific power in the period t: at first add up out genset realtime power MW, fuel quantity T, the total amount in period t, i.e. A=∫
0 tMW and B=∫
0 tT draws the fuel quantity Q=B/A of genset specific power in the period t then;
⑷ derive coal-fired calorific value original coefficient K: the fuel quantity of setting the genset specific power is Q
0, Q
0Be the mean value of this genset historical record Q value, calculate coal-fired calorific value original coefficient K=Q/Q
0
⑸ derive the conversion constant C:C=(C of pressure and ature of coal
0-P
t)/(C
0-P
0), P wherein
0Be initial timing genset drum pressure value, P
tBe t genset drum pressure value constantly, C
0Be the pressure correction constant, this constant draws for test;
⑹ obtain the coal-fired calorific value coefficient of colligation K '=K * C after the pressure correction;
⑺ draw the real-time best coal-supplying amount=K ' of genset * former coal-supplying amount of genset.
2. the method for the real-time coal-fired calorific value Coefficient Optimization firepower power station of employing according to claim 1 coal supply is characterized in that: genset test gained pressure correction constant C among the said step ⑸
0Test to obtain step following:
⑴ the starting condition of determination test is: the generation load of genset is 250MW, and the genset drum pressure is 16MPa, and genset operation fuel quantity is 125 tons/hour, and the duration of test ature of coal remains unchanged;
⑵ the end condition of determination test is: the generation load of genset is 250MW, and the genset drum pressure is 17MPa, and genset operation fuel quantity is 125 tons/hour;
⑶ after known generators group drum pressure is changed to 1MPa; Draw the conversion constant C of pressure and ature of coal through the calculating generator group coal consumption that disappears: recording genset, to carry out the transition to end condition transit time gradually by starting condition be 4 hours; Increase continuously fuel quantity in the transition period and amount to 40 tons, calculate conversion constant C=(125 tons/hour * 4 hours)/(40 tons+125 tons/hour * 4 hours)=0.93 of pressure and ature of coal;
⑷ calculating pressure correction constant C
0Value: utilize formula C=(C
0-P
t)/(C
0-P
0) calculate, wherein: C=0.93, P
0=16, P
t=17, draw the pressure correction constant C
0=29.5.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674333A (en) * | 2013-12-17 | 2014-03-26 | 上海交通大学 | Real-time identification method for fired coal lower heating value of coal-fired power plant |
| CN107622451A (en) * | 2017-09-15 | 2018-01-23 | 国电科学技术研究院 | A kind of coal fuel heating value correction method and device |
| CN109102425A (en) * | 2018-08-07 | 2018-12-28 | 广州粤能电力科技开发有限公司 | A kind of coal quality modification method, device and equipment |
| CN113723829A (en) * | 2021-08-31 | 2021-11-30 | 西安热工研究院有限公司 | Method for calculating heat value difference of coal as fired in thermal power plant |
| CN115098822A (en) * | 2022-06-28 | 2022-09-23 | 西安热工研究院有限公司 | Method for correcting power consumption of coal feeding system in overall performance test of coal-fired unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037952A (en) * | 2006-12-12 | 2007-09-19 | 邢一崧 | Integral combined circulating power generation system of coal bed gas and coal mine ventilation gas |
| CN101348070A (en) * | 2008-08-04 | 2009-01-21 | 刘开宁 | Accumulating continuous conversion automatic energy supply automobile power system |
| CN101701719A (en) * | 2009-11-17 | 2010-05-05 | 武汉大学 | Best combustion coal-saving power generation controlling method in thermal power plant and device thereof |
| CN101858245A (en) * | 2010-04-28 | 2010-10-13 | 大连理工大学 | Combustion system of large gas fuel engine |
| CN101893877A (en) * | 2009-05-20 | 2010-11-24 | 中国国电集团公司九江发电厂 | Optimization operational method based on energy consumption analysis for power plant and system thereof |
| US20110282500A1 (en) * | 2010-05-17 | 2011-11-17 | General Electric Company | System and method for enhancement of power generation facilities |
-
2012
- 2012-05-25 CN CN 201210167141 patent/CN102662318B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037952A (en) * | 2006-12-12 | 2007-09-19 | 邢一崧 | Integral combined circulating power generation system of coal bed gas and coal mine ventilation gas |
| CN101348070A (en) * | 2008-08-04 | 2009-01-21 | 刘开宁 | Accumulating continuous conversion automatic energy supply automobile power system |
| CN101893877A (en) * | 2009-05-20 | 2010-11-24 | 中国国电集团公司九江发电厂 | Optimization operational method based on energy consumption analysis for power plant and system thereof |
| CN101701719A (en) * | 2009-11-17 | 2010-05-05 | 武汉大学 | Best combustion coal-saving power generation controlling method in thermal power plant and device thereof |
| CN101858245A (en) * | 2010-04-28 | 2010-10-13 | 大连理工大学 | Combustion system of large gas fuel engine |
| US20110282500A1 (en) * | 2010-05-17 | 2011-11-17 | General Electric Company | System and method for enhancement of power generation facilities |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674333A (en) * | 2013-12-17 | 2014-03-26 | 上海交通大学 | Real-time identification method for fired coal lower heating value of coal-fired power plant |
| CN103674333B (en) * | 2013-12-17 | 2016-02-10 | 上海交通大学 | A kind of real-time identification method of coal fired power plant as-fired coal net calorific value |
| CN107622451A (en) * | 2017-09-15 | 2018-01-23 | 国电科学技术研究院 | A kind of coal fuel heating value correction method and device |
| CN107622451B (en) * | 2017-09-15 | 2021-06-15 | 国电科学技术研究院 | Coal-fired calorific value correction method and device |
| CN109102425A (en) * | 2018-08-07 | 2018-12-28 | 广州粤能电力科技开发有限公司 | A kind of coal quality modification method, device and equipment |
| CN109102425B (en) * | 2018-08-07 | 2022-04-26 | 广州粤能电力科技开发有限公司 | Coal quality correction method, device and equipment |
| CN113723829A (en) * | 2021-08-31 | 2021-11-30 | 西安热工研究院有限公司 | Method for calculating heat value difference of coal as fired in thermal power plant |
| CN115098822A (en) * | 2022-06-28 | 2022-09-23 | 西安热工研究院有限公司 | Method for correcting power consumption of coal feeding system in overall performance test of coal-fired unit |
| CN115098822B (en) * | 2022-06-28 | 2024-02-27 | 西安热工研究院有限公司 | Correction method for power consumption of coal feeding system in overall performance test of coal-fired unit |
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Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121205 |
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Effective date of registration: 20121205 Address after: 300010 Tianjin city Hebei District five Hebei Industry District Road No. 39 Applicant after: Tianjin Electric Power Corp. Applicant after: State Grid Corporation of China Address before: 300010 Tianjin city Hebei District five Hebei Industry District Road No. 39 Applicant before: Tianjin Electric Power Corp. |
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Inventor after: Zhao Yi Inventor after: Lv Haijing Inventor after: Yang Xin Inventor after: Huang Jingning Inventor before: Zhao Yi Inventor before: Huang Jingning |
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