155 分散型エネルギーシステムにおける熱利用プロセスのモデルベース性能監視 : 過渡状態での動的補償を用いた性能監視

Abstract

A model-based performance monitoring method for a heat utilization process in a distributed energy system is developed in this study. The performance monitoring has three components: a static input-output model for the target process, a dynamic compensation function, and a failure detection function. First, the static input-output model estimates the output process variables in response to the variations in the input process variables. Then, the dynamic characteristics of the output process variables are provided in the dynamic compensation function where they are indentified as first order lag systems. Finally, the estimated output process variables considering the dynamic characteristics are compared with the measured output process variables in order to detect device failures. Through a numerical simulation for a heat utilization process in a gas engine cogeneration system that has a radiator with a considerable lag characteristic, the effectiveness of the developed performance monitoring method in a transient state is verified. The result shows the sufficiency of the estimation accuracy of the output process variables and the capability of detecting device failures in a transient state.