﻿ 基于状态观测器的软测量动态补偿方法

# 基于状态观测器的软测量动态补偿方法Dynamic Compensation Method for Soft Sensing Based on State Observer

Abstract: The coal calorific value calculated by using the method of mechanism analysis has slow response speed and big dynamic error under variable load conditions. In order to solve this problem, a dy-namic compensation method based on state observer is proposed. Based on the load-pressure model of unit, the total heat input into the boiler is constructed by the drum pressure and the tur-bine primary pressure. The dynamic relationship between the boiler fuel flow and the total heat is described by a high order inertia link. By designing a state observer for the high order inertia link, the intermediate state signal with smaller inertia is obtained, which is divided by the fuel flow to gain the signal of the coal calorific value. The signal of coal calorific value has small dynamic error under variable load conditions, Experiments show that: the signal of coal calorific value has better behaviors on disturbance restraint and dynamic response.

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