基于辐射能信号的燃煤火电机组燃料在线优化控制分析与应用-analysis and application of on-line optimal control of coal-fired thermal power unit fuel based on radiant energy signal.docx

AbstractBy using 20 flame detectors arranged in the furnace space collecting the real-time monitoring images of the furnace flame, the furnace radiant energy signal can be obtained due to the digital computing and image processing technology. This signal can reflect the changes of radiation released by the furnace combustion quickly and accurately. the furnace radiant energy signal is applied to the combustion control of power generation unit , it can take advantage of the real-time detection, skip the middle process of the water wall endothermic heating up in the traditional means of control , control the level of the furnace exothermic from the source directly and quantify. It can per-control the target parameters such as the main steam temperature and the main steam pressure of the behind process.In this paper, the radiation signal acquisition system as well as the online correction method of calculating was introduced, data analysis and simulation was carried out about the method of its application. the DCS logic configuration of the radiant energy signal involved in the combustion optimization of unit was introduced as well. The logical configuration can determine the unit operating conditions, according to the current conditions and the load instruction set the furnace radiant energy level, and control the amount of fuel according to the measured radiant energy and the radiant energy setting value by use the PID controller.Closed-loop control test of the system was put on trial in Guizhou Huadian Tangzhai Power Plant. In this paper, the actual operation data before and after the test of the unit were compared and analyzed, reached the conclusion that Radiant energy control system can improve the steady state operating efficiency of the existing control system in generating units, and reduce the volatility of the various parameters, and shows a good results in stable combustion conditions in the furnace and the main steam parameters. The same time, the degree o