CN114849890A - Method for reducing plant power consumption rate based on optimization of coal mill plant starting - Google Patents
Method for reducing plant power consumption rate based on optimization of coal mill plant starting Download PDFInfo
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- CN114849890A CN114849890A CN202210457908.XA CN202210457908A CN114849890A CN 114849890 A CN114849890 A CN 114849890A CN 202210457908 A CN202210457908 A CN 202210457908A CN 114849890 A CN114849890 A CN 114849890A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention belongs to the technical field of power utilization management, in particular to a method for reducing the plant power utilization rate based on the optimized coal mill plant starting, which provides the following scheme, and comprises the following steps: s1: calculating the target load of a unit according to an equal-micro-increase algorithm, and calculating the coal consumption demand reaching the target; s2: calculating the operation margin ratio of the single coal mill, and arranging; s3: and superposing the rated output of the coal mill, calculating the total rated output of the running coal mill, and judging the total rated output of the running coal mill and the coal consumption demand of the coal mill. According to the invention, the coal mill factors are added on the basis of the original equal-differential-gain algorithm, and the starting number of the coal mills is optimized, so that the purpose of reducing the plant power consumption is achieved, the starting number of the coal mills can be optimized according to the current starting running state of the coal mills, the energy consumption is saved, and the power consumption is reduced.
Description
Technical Field
The invention relates to the technical field of power utilization management, in particular to a method for reducing station power utilization rate based on optimization of starting of a coal mill.
Background
The frequency is an important index in the modern power quality standard, and the frequency has a close relation with the generated energy and the load, so that the power dispatching of each level in China has unified dispatching for the load of a power plant. The characteristic of the prior dispatching for controlling the load of the power plant is that the single machine control, namely the load target control point, is a single machine set. At present, a full-field load optimization control system is provided, a power plant is used as a control point, the power plant can perform optimized load distribution, but in actual operation, due to the fact that a phenomenon that a coal mill is frequently started and stopped occurs due to load adjustment, the coal mill is one of main consumers of service power, so that the service power utilization rate is high, and therefore a method for reducing the service power utilization rate based on the starting of an optimized coal mill is needed.
Disclosure of Invention
The invention provides a method for reducing the plant power consumption rate based on the optimization of the starting of a coal mill plant, which solves the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for reducing plant power consumption rate based on optimized coal mill plant starting comprises the following steps:
s1: calculating the target load of a unit according to an equal-micro-increase algorithm, and calculating the coal consumption demand reaching the target;
s2: calculating the operation margin ratio of the single coal mill, and arranging;
s3: and superposing the rated output of the coal mill, calculating the total rated output of the running coal mill, and judging the total rated output of the running coal mill and the coal consumption demand of the coal mill.
Preferably, in step S1: and calculating the target load of a single coal mill by adopting an equal micro-addition algorithm, and calculating the coal consumption demand M reaching the target according to a coal consumption curve.
Preferably, in step S2: the operation margin ratio is X, wherein
X | X1, X2, X3..
Preferably, in step S3: when the total rated force of the coal mills is greater than the coal consumption demand, namely B1+ B2+ B3+ · B + Bn is greater than or equal to M, the rated output of the single coal mills is superposed according to the operation margin ratio sequence until the rated output is just greater than the coal consumption demand of the unit, namely B1+ B2+ B3+. 9. + Bm-M is delta p;
when the delta p is more than 0 and less than or equal to Bm and m is less than n, all running coal mills behind the sequence number m are shut down;
and when m is equal to n, keeping the number of the running coal mills.
Preferably, in step S3: the total rated output of the coal mill in operation is less than the coal consumption demand, namely B1+ B2+ B3+.. + Bn < M;
when the difference delta p between the coal consumption demand and the total rated output of the running coal mills is smaller than the difference between the available output of the nth coal mill, namely the rated output and the current output, the output of the nth coal mill can Be adjusted, and the running number of the coal mills remains unchanged, namely [ | B1+ B2+ B3+ ]. + Bn-M | < Bn-Be ];
when the difference between the coal consumption demand and the total rated output of the running coal mills is larger than the available output of the nth coal mill, randomly extracting the coal mills which are not running, superposing the rated outputs by taking the total rated output of the running coal mills as a basic value until the sum is just larger than the coal consumption demand of the unit, namely B1+ B2+ B3+. 9 + Bn +. 9 + Bk-M, and comparing the sum with the rated power of the last superposed coal mill by using the delta p: and when the delta p is more than 0 and less than or equal to Bk, starting the (n + 1) th to the Kth coal mills.
According to the invention, the coal mill factors are added on the basis of the original equal-differential-gain algorithm, and the starting number of the coal mills is optimized, so that the purpose of reducing the plant power consumption is achieved, the starting number of the coal mills can be optimized according to the current starting running state of the coal mills, the energy consumption is saved, and the power consumption is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
A method for reducing plant power consumption rate based on optimized coal mill plant starting comprises the following steps:
s1: calculating the target load of a unit according to an equal-micro-increase algorithm, and calculating the coal consumption demand reaching the target;
calculating the target load of a single coal mill by adopting an equal micro-addition algorithm, and calculating the coal consumption demand M reaching the target according to a coal consumption curve;
s2: calculating the operation margin ratio of the single coal mill, and arranging;
the operation margin ratio is X, wherein
Arranging { X | X1, X2, X3.... Xn } according to the ratio from high to low, wherein X is the operation margin ratio of a single coal mill, P is the measured power value of the coal mill, and PE is the rated power of the coal mill;
s3: superposing the rated output of the coal mill, calculating the total rated output of the running coal mill, and judging the total rated output of the running coal mill and the coal consumption demand of the coal mill;
the first embodiment is as follows:
when the total rated output of the coal mill is larger than the coal consumption demand, namely B1+ B2+ B3+ - · Bn is larger than or equal to M; superposing rated output of the single coal mill according to the operation margin ratio sequence until the rated output is just larger than the coal consumption demand of the unit, namely B1+ B2+ B3+ - ·+ Bm-M is delta p, B is rated output of the single coal mill, M is the coal consumption demand of the unit, and delta p is compared with the rated power of the last superposed coal mill;
when the delta p is more than 0 and less than or equal to Bm and m is less than n, all running coal mills behind the sequence number m are shut down;
when m is equal to n, keeping the number of the running coal mills;
example two:
when the total rated output of the running coal mills is less than the coal consumption demand, namely B1+ B2+ B3+... + Bn < M;
when the difference delta p between the coal consumption demand and the total rated output of the running coal mills is smaller than the difference between the available output of the nth coal mill, namely the rated output and the current output, the output of the nth coal mill can Be adjusted, the number of running coal mills is kept unchanged, namely [ | B1+ B2+ B3+ ] and.
When the difference between the coal consumption demand and the total rated output of the running coal mills is larger than the available output of the nth coal mill, randomly extracting the coal mills which are not running, superposing the rated outputs by taking the total rated output of the running coal mills as a basic value until the sum is just larger than the coal consumption demand of the unit, namely B1+ B2+ B3+. 9 + Bn +. 9 + Bk-M, and comparing the sum with the rated power of the last superposed coal mill by using the delta p: when the delta p is more than 0 and less than or equal to Bk, starting the (n + 1) th to the Kth coal mills:
according to the design, coal mill factors are added on the basis of the original equal incremental algorithm, and the starting number of the coal mills is optimized, so that the purpose of reducing the plant power consumption rate is achieved.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships that are convenient and simple to describe, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A method for reducing plant power consumption rate based on optimization of coal mill plant starting is characterized by comprising the following steps:
s1: calculating the target load of a unit according to an equal-micro-increase algorithm, and calculating the coal consumption demand reaching the target;
s2: calculating the operation margin ratio of the single coal mill, and arranging;
s3: and superposing the rated output of the coal mill, calculating the total rated output of the running coal mill, and judging the total rated output of the running coal mill and the coal consumption demand of the coal mill.
2. The method for reducing plant power consumption based on optimizing the start-up of a coal mill plant as claimed in claim 1, wherein in step S1: and calculating the target load of a single coal mill by adopting an equal micro-addition algorithm, and calculating the coal consumption demand M reaching the target according to a coal consumption curve.
3. The method for reducing plant power consumption based on optimizing the start-up of a coal mill plant as claimed in claim 1, wherein in step S2: the operation margin ratio is X, wherein
X | X1, X2, X3..
4. The method for reducing plant power consumption based on optimizing the start-up of a coal mill plant as claimed in claim 1, wherein in step S3: when the total rated force of the coal mills is greater than the coal consumption demand, namely B1+ B2+ B3+ · B + Bn is greater than or equal to M, the rated output of the single coal mills is superposed according to the operation margin ratio sequence until the rated output is just greater than the coal consumption demand of the unit, namely B1+ B2+ B3+. 9. + Bm-M is delta p;
when the delta p is more than 0 and less than or equal to Bm and m is less than n, all running coal mills behind the sequence number m are shut down;
and when m is equal to n, keeping the number of the running coal mills.
5. The method for reducing plant power consumption based on optimizing the start-up of a coal mill plant as claimed in claim 1, wherein in step S3: the total rated output of the coal mill in operation is less than the coal consumption demand, namely B1+ B2+ B3+.... + Bn < M;
when the difference delta p between the coal consumption demand and the total rated output of the running coal mills is smaller than the difference between the available output of the nth coal mill, namely the rated output and the current output, the output of the nth coal mill is adjusted, and the running number of the coal mills remains unchanged, namely [ | B1+ B2+ B3+ ].... + Bn-M | < Bn-Be ];
when the difference between the coal consumption demand and the total rated output of the running coal mills is larger than the available output of the nth coal mill, randomly extracting the coal mills which are not running, superposing the rated outputs by taking the total rated output of the running coal mills as a basic value until the sum is just larger than the coal consumption demand of the unit, namely B1+ B2+ B3+. 9 + Bn +. 9 + Bk-M, and comparing the sum with the rated power of the last superposed coal mill by using the delta p: and when the delta p is more than 0 and less than or equal to Bk, starting the (n + 1) th to the Kth coal mills.
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Cited By (1)
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| CN115318421A (en) * | 2022-08-10 | 2022-11-11 | 西安热工研究院有限公司 | Control method and device for starting and stopping coal mill unit, storage medium and electronic equipment |
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| CN115318421B (en) * | 2022-08-10 | 2024-02-13 | 西安热工研究院有限公司 | Control method and device for start-stop coal mill unit, storage medium and electronic equipment |
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