NHẬN DẠNG MÔ HÌNH TUYẾN TÍNH THAM SỐ BIẾN THIÊN HỘP XÁM CHO NHIỆT ĐỘ HƠI QUÁ NHIỆT CỦA LÒ HƠI

Abstract

This paper focuses on the identification of grey-box LPV model for the boiler superheated steam temperature from local approach. Rather than building a model either from the law of physics or from experimental data independently, the combination of an analytic and an experimental approach is used to identify an LPV model of a boiler superheated steam temperature. The parameters of the LPV model are approximated as a rational function of the main steam flow. The global LPV model is estimated by applying a parameters interpolation technique of local linear model parameters. The proposed method is applied to the identification for Boiler superheated steam temperature process in the Pha-Lai Power Plant. The results show that the obtained model is of high accuracy and the proposed method is feasible.