A thermotechnical process steady state detection method and system

The embodiment of the invention provides a thermotechnical process steady-state detection method and system, and the method and system are applied to a thermal power plant, specifically, thermotechnical process data of the thermal power plant are processed based on an empirical mode decomposition method, and track trend data of the thermotechnical process data are obtained; the track trend data isprocessed based on an R statistical inspection method of a statistical theory to obtain a sample variance of the track trend data; And whether the thermotechnical process data is in a steady state ornot is judged according to the sample variance so as to obtain a steady state detection result. Therefore, identification and modeling errors can be avoided, and an important basis is provided for equipment performance evaluation, operation optimization, system identification and fault detection of the thermal power plant. 本发明实施例提供了一种热工过程稳态检测方法和系统，该方法和系统应用于火力发电厂，具体为基于经验模态分解方法对火力发电厂的热工过程数据进行处理，得到热工过程数据的轨迹趋势数据；基于统计学理论的R统计检验