METHOD AND APPARATUS FOR IMPROVING STEAM TEMPERATURE CONTROL

摘要

A system for analyzing the impact of operating soot blowers in a heat transf er section of a power plant determines a steam temperature influencing sequence and calculates a feed-forward signal to be applied to a steam temperature control system of t he heat transfer section. The system operates a group of soot blowers for a number of times a nd collects quantitative data related to the steam temperature during and after each soo t blowing operation. A computer program used by the system analyzes the quantitative data, generates a number of statistical parameters for evaluating the impact of operating th e soot blowers according to a given sequence on the steam temperature, and determines wheth er the given sequence is a steam temperature influencing sequence. Consequently, the syst em determines a feed-forward signal based on the steam temperature influencing sequence an d applies the feed-forward signal to a steam temperature control system used by the heat transfer section to compensate for any adverse impact of soot blowing.