Estimation of feedwater heater parameters based on a grey-box approach

A Feedwater Heater Model Intended For Model-Based Diagnostics

Work related to the first-principle modeling of a feedwater heater operating in a coal-fired power unit is presented, along with theoretical discussion concerning its structural simplifications, parameter estimation, and dynamical validation. The objectives of this work are as follows: (i) formulate and deploy a moderately complex first-principle model of a feedwater heater to reproduce operati...

Fuzzy Logic Approach to Diagnosis of Feedwater Heater Performance Degradation

Since failure in, damage to, and performance degradation of power generation components in operation under harsh environment of high pressure and high temperature may cause both economic and human loss at power plants, highly reliable operation and control of these components are necessary. Therefore, a systematic method of diagnosing the condition of these components in its early stages is req...

Lqg/ltr Robust Control System Design for a Low-pressure Feedwater Heater Train

This paper uses the linear quadratic Gaussian with loop transfer recovery (LQG/LTR) control system design method to obtain a level control system for a low-pressure feedwater heater train. The control system performance and stability robustness are evaluated for a given set of system design specifications. The tools for analysis are the return ratio, return difference, and inverse return differ...

A Case Study of Feedwater Heater Life Management

Grey-box Modelling of a Quadrotor Using Closed-loop Data

In this thesis a quadrotor is studied and a linear model is derived using grey-box estimation, a discipline in system identification where a model structure based on physical relations is used and the parameters are estimated using input-output measurements. From imu measurements and measured pwm signals to the four motors, a direct approach using the prediction-error method is applied. To inve...