Affiliation:
1. Tourism College of Changchun University, Changchun, China
Abstract
In order to solve the problem of intelligent fault diagnosis of thermal
system of thermal power unit, the application modelling of intelligent
diagnosis of thermal cycle system is proposed. This paper first filters the
influence of the change of valve opening of steam turbine on the performance
index under the condition of constant power, and qualitatively analyzes the
actual change of the performance index compared with the reference working
condition when the component fails, so as to eliminate the mutual influence
between the components. Then, the selection principle of thermodynamic
parameters is determined, the irreversible loss in the structural theory of
thermal economics is introduced as the performance index, and the model is
used to quantitatively calculate the change of performance index of each
component under fault conditions to diagnose the failed component. Finally,
APROS simulation software is used to simulate various fault conditions of
330 MW units in a power plant. The experimental results show that the
recognition accuracy of the monitoring system designed in this paper can
reach 98.33%. In conclusion, the method in this paper proves the feasibility
of intelligent fault diag?nosis of thermodynamic system network.
Publisher
National Library of Serbia
Subject
Renewable Energy, Sustainability and the Environment
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