Influence analyzing apparatus for analyzing influence of combustibles

Patent metadata

Field	Value
Publication number	US-10753602-B2
Application number	US-201715700953-A
Country	US
Kind code	B2
Filing date	Sep 11, 2017
Priority date	Sep 12, 2016
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A apparatus may extract temperature for each region of a feed water and steam system of a thermoelectric power plant with respect to a combustible combination including one or more combustibles, extract one or more vectors for each region from the temperatures extracted for each region, generate one or more combustible clusters, each cluster including one or more combustible combinations having similar properties from the extracted vectors, and extract a characteristic component of a combustible combination that increases or decreases a boiler performance index from among one or more combustible combinations included in the one or more combustible clusters.

First claim

What is claimed is:

1. An influence analyzing apparatus for analyzing influence of combustibles, the combustibles including a mixed coal used in a thermoelectric power plant, the influence analyzing including calculating a degree of influence of characteristic components of the mixed coal on a boiler performance index and a furnace heat absorption rate, the apparatus comprising a computer processing unit (CPU) configured to execute functions of:
a temperature extractor configured to extract temperatures of respective regions in a feed water and steam system of the thermoelectric power plant in which a combustible combination including one or more coals is combusted;
a vector extractor configured to extract one or more vectors for each region from the temperatures of the respective regions;
a cluster generator configured to generate one or more combustible clusters, each cluster including one or more combustible combinations having similar properties, on the basis of the extracted vectors; and
a characteristic component extractor configured to extract a characteristic component of a combustible combination that increases or decreases the boiler performance index from the one or more combustible combinations included in the one or more combustible clusters.

2. The apparatus according to claim 1 , wherein the temperature extractor is configured to extract temperatures of at least one of a feed water heater, an economizer, a furnace, a super heater, and a reheater in each region of the feed water and steam system.

3. The apparatus according to claim 1 , wherein the temperature extractor is configured to extract temperatures for each region at a predetermined time interval.

4. The apparatus according to claim 1 , wherein the vector extractor is configured to extract the one or more vectors by performing functional principal component analysis with respect to the extracted temperatures of the respective regions.

5. The apparatus according to claim 1 , wherein the vector extractor is configured to calculate a smoothing function based on a basis function, and calculate, for each combustible combination, an average of the temperatures of the respective regions of the feed water and steam system and a covariance at two different time points based on the calculated smoothing function.

6. The apparatus according to claim 5 , wherein the vector extractor is configured to calculate an eigen function and eigenvalues using the calculated covariance, and extract the one or more vectors for each region with respect to each combustible combination on the basis of the calculated eigen function, the calculated smoothing function, and the calculated average temperature of the temperatures of the respective regions of the feed water and steam system with respect to each of the one or more combustible combinations.

7. The apparatus according to claim 6 , wherein the vector extractor is configured to extract the eigen function by minimizing a variance of the calculated eigenvalues.

8. The apparatus according to claim 1 , wherein the cluster generator is configured to generate the one or more combustible clusters based on cluster analysis.

9. The apparatus according to claim 1 , wherein the boiler performance index includes at least one of an exit temperature of a boiler and the furnace heat absorption rate.

10. The apparatus according to claim 1 , wherein the CPU is further configured to execute a function of a characteristic component selector configured to select one or more characteristic components from characteristic component groups when a correlation coefficient obtained through correlation analysis of two or more characteristic components included in the characteristic component group is greater than or equal to a reference value.

11. The apparatus according to claim 10 , wherein the CPU is further configured to execute a function of a characteristic component determiner configured to determine, by performing stepwise regression, a characteristic component influencing the boiler performance index from among the selected one or more characteristic components.

12. The apparatus according to claim 10 , wherein the CPU is further configured to execute a function of a relational expression calculator configured to calculate, using a random forest algorithm, a relational expression to determine a relationship between the selected one or more characteristic components and the boiler performance index.

Assignees

• Doosan Heavy Ind & Construction Co Ltd
• Doosan Heavy Ind Constr Co Ltd

Inventors

• Kim Seongjoon
• Jung Byungil

Classifications

• F22D1/003

  Feed-water heater systems (F22D1/325, F22D1/36 and F22D1/40 take precedence) · CPC title

• F22B1/282

  with water or steam circulating in tubes or ducts · CPC title

• G05D23/20 Primary

  with sensing elements having variation of electric or magnetic properties with change of temperature (G05D23/13 takes precedence) · CPC title

• G01N27/4163

  checking the operation of, or calibrating, the measuring apparatus (G01N27/3274, G01N27/4175 and G01N33/0006 take precedence) · CPC title

• F23N1/00

  Regulating fuel supply · CPC title