一种基于LSSVM的飞灰含碳量软测量方法及装置
A Soft Measurement Method and Device for Carbon Content of Fly Ash Based on LSSVM
-
摘要:
飞灰含碳量是反映火电厂锅炉燃烧效率的重要指标之一。实时准确地检测飞灰含碳量对指导锅炉运行，提升锅炉效率具有重要意义。现行检测装置大都采用灼烧、反射等物理化学方法测量飞灰含碳量，测量滞后大、准确度不高，且设备复杂昂贵，维护成本高，现场应用效果较差；本文采用软测量技术对飞灰含碳量进行间接测量，提出了一种基于LSSVM的飞灰含碳量软测量方法，选取方便测量的相关运行参数为辅助变量，通过软测量模型对飞灰含碳量进行实时预测，并将LSSVM软测量系统嵌入到PLC中，研制了一种飞灰含碳量在线软测量装置，无需采取灰样，预测速度快，准确度较高。 Abstract:The carbon content of fly ash is one of the important indexes to reflect the combustion efficiency of boiler in thermal power plant. Real-time and accurate detection of carbon content of fly ash is of great significance for guiding the operation of the boiler and enhancing the efficiency of the boiler. Most of the current detection devices use burning and reflection methods to measure the carbon content of fly ash, this kind of measurement subjects to long lag, low accuracy, high maintenance cost and poor field application effect. In this paper, the ash content of fly ash based on LSSVM was proposed, and the relevant operating parameters of convenience measurement were taken as auxiliary variables. The soft measurement model was used to forecast the carbon content of fly ash in real time. And this paper embeded LSSVM soft sensor system into the PLC, developed a kind of fly ash carbon content on-line soft sensor device which can achieve measurement quickly and accurately without the ash sample.
下载:
