In-situ calibration of boiler instrumentation using analytic redundancy

This paper presents a broadly useful diagnostic methodology, which engineer s and plant managers can use to detect system faults and find the in-situ o perating characteristics of boilers when some metered data are either missi ng or obviously erroneous. The methodology is able to analyse conflicting m easurements and utilize analytic redundancy (AR) to deduce the measurement or measurements that are substantially in error without shutting down the p lant and recalibrating all instrumentation. The application of the AR techn ique in evaluating boiler performance is presented through a case study. Co pyright (C) 2001 John Wiley & Sons, Ltd.