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A method for determining the lifting and lowering load rate based on the operating data of thermal power units

A technology of raising and lowering rate and power station unit, applied in the field of soft measurement, can solve the problems of heavy workload and affecting the normal operation of the unit, and achieve the effect of low cost and accurate prediction result

Active Publication Date: 2020-08-11
SOUTHEAST UNIV +2
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  • Claims
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Problems solved by technology

Therefore, the test results of a single unit cannot be extended to other units, and the test of each unit will not only have a huge workload, but also affect the normal operation of the unit

Method used

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  • A method for determining the lifting and lowering load rate based on the operating data of thermal power units
  • A method for determining the lifting and lowering load rate based on the operating data of thermal power units
  • A method for determining the lifting and lowering load rate based on the operating data of thermal power units

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Embodiment Construction

[0072] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0073] A method for determining a lifting and lowering load rate based on operating data of a thermal power unit, comprising:

[0074] Step 1: Read the continuous load data in the DCS historical database of the power station distributed control system at intervals of unit time as the total sample for calculating the maximum load lifting rate. The array composed of the load data is recorded as A, and the first-order difference is recorded as array C.

[0075] C(i)=A(i+1)-A(i)

[0076] Step 2: Set the window length to 10, and calculate the standard deviation s of the load data in the window in the form of a sliding window;

[0077] Step 3: Counting the required standard deviation, f...

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Abstract

The invention discloses a method for determining the maximum ascending and descending load speed of a power station machine unit. The method comprises the following steps of 1, reading continuous load data using unit time as the interval from a historical database of a power station DCS (Distribution Control System) to be used as a total sample for calculating the maximum load ascending and descending speed, and performing first order difference; 2, setting the window length N, and calculating a standard deviation s of load data in a window by using a sliding window form; 3, counting the solved standard deviation, and finding a distribution rule to obtain a standard deviation threshold value for distinguishing the steady-state process and the non-steady-state process; 4, determining the start-stop moment and the duration of the load non-steady-state process; and 5, determining the maximum ascending and descending load speed of the machine unit. The method has the advantages that the prediction of the maximum ascending and descending load speed of the machine unit is performed according to the real historical data of the machine unit; the prediction result is accurate; only the machine unit operation historical data is needed in the concrete implementation process; simplicity is realized; the implementation is easy; and no any influence is caused on the safe operation of the machine unit.

Description

technical field [0001] The invention relates to a method for determining the maximum lifting and lowering load rate of a thermal power unit based on its operation data, and belongs to the field of soft measurement. Background technique [0002] The load lifting rate of thermal power units is affected by many factors such as boiler characteristics (boiler energy storage, pulverizing system), steam turbine characteristics (speed control system) and control system. Therefore, it is not only difficult to determine the maximum lifting load rate through mechanism modeling, but also has low accuracy. [0003] At present, thermal power units are mainly determined by thermal tests to determine their maximum lifting and lowering load rates. However, due to the different characteristics of boilers, steam turbines and control systems of different units, the maximum lifting and lowering load rates of each unit are also different. Therefore, the test results of a single unit cannot be ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/10
CPCG16Z99/00
Inventor 赵刚刘朝阳赵明郝勇生李孟阳苏志刚杜景琦王培红
Owner SOUTHEAST UNIV
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