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Method for determining actual heat consumption of steam extraction heat supply machine

A steam extraction heat supply unit, heat consumption technology, applied to calorimeters, heat measurement, instruments, etc., can solve the problems of low heat consumption accuracy and increased workload

Active Publication Date: 2012-09-12
HUADIAN ENERGY COMPANY LIMITED +1
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Problems solved by technology

[0003] In order to solve the problem that the actual heat consumption time cannot be obtained due to the fact that the actual steam extraction volume is not a specific steam extraction volume in the actual operation of the power plant, the present invention needs to do supplementary tests or artificially estimate the increase brought about by the process of obtaining the actual heat consumption during the actual operation process. Due to the low accuracy of workload and heat consumption, a method for determining the actual heat consumption of extraction steam heating units is proposed

Method used

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  • Method for determining actual heat consumption of steam extraction heat supply machine
  • Method for determining actual heat consumption of steam extraction heat supply machine
  • Method for determining actual heat consumption of steam extraction heat supply machine

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine Figure 1 to Figure 3 Describe this embodiment, a method for determining the actual heat consumption of the extraction steam heating unit described in this embodiment, the parameters of the extraction steam heating unit are:

[0023] According to the steam turbine thermal performance assessment test regulations, the formula for calculating the heat consumption rate of the unit is:

[0024] H rt = F ms × H ms - F fw × H fw - F shsp × H shsp + F c...

specific Embodiment approach 2

[0039] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the specific process of the joint method of maximum likelihood estimation method and AIC criterion described in step 1 is:

[0040] Extraction steam for heating F cq Certain, independent variables are steam turbine power P, heat consumption H rt The relationship between the dependent variables is fitted; the independent variables are steam turbine power P, heat consumption H rt The relationship between the dependent variable is a polynomial model and the model error satisfies a normal distribution;

[0041] Dependent variable heat consumption H rti The relationship with the independent variable steam turbine power P is expressed by formula 3:

[0042] h rti =a 0 +a 1 P+a 2 P 2 +…+a n P n +ε i Formula 3

[0043] The parameter ε in Equation 3 i Indicates that the mean is zero and the variance is δ 2 A random variable with a normal distribution, denoted by ε i ~N(0,δ 2 ), para...

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Abstract

A method for determining actual heat consumption of a steam extraction heat supply machine resolves the problems of working amount increase in the operation process and low heat consumption accuracy caused by the process that compensation experiments or manual estimations are required to obtain actual heat consumption when actual heat consumption cannot be obtained due to the fact that actual steam extraction quantity is not specific steam extraction quantity in operation of a power plant. The method includes 1 conducting matching on relation between the heat consumption, turbine power and heat supply steam extraction amount; 2 selecting heat supply steam extraction amount; 3 changing the turbine power four times under each steam extraction amount; 4 obtaining heat consumption of each working condition point; 5, determining order of matching polynomial of the working condition points with the same steam extraction amount and conducting matching; 6 converting a coordinate system and conducting matching on the working condition points with the same power; and 7 obtaining heat consumption curve of any heat supply steam extraction amount according to the order of the matching polynomial. The method effectively reduces working amount, improves heat consumption accuracy and is suitable for a steam extraction heat supply machine set.

Description

technical field [0001] The invention relates to a method for determining the actual heat consumption of a steam extraction heat supply unit. Background technique [0002] During the actual operation of the generator set in the power plant, the heat consumption is an important indicator to measure the economy of the unit. In the actual operation process, the easiest and most effective way to obtain heat consumption is to query the heat consumption curve, which is of great significance to actual production. However, the unit heat consumption curve provided by the steam turbine manufacturer is often different from the heat consumption curve during the actual operation of the unit. Therefore, the power plant will pass tests in actual operation to determine the actual heat consumption curve of each unit. However, due to the test period Long, and the heat consumption curve can only reflect the relationship between several specific steam extraction volumes, power and heat consumpt...

Claims

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Application Information

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IPC IPC(8): G01K17/08
Inventor 刘金福胡宝权刘娇宋崇明张怀鹏李飞陈增吉李涛徐扬李树臣张修君左世春于达仁
Owner HUADIAN ENERGY COMPANY LIMITED
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