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根据火电厂实际经济运行和生产管理的需要，设计了实时能损监测及分析系统。实践表明，该系统不仅可在线监测火电机组热力系统的实际运行状态，而且能根据各项能损偏差，诊断运行经济性优劣，指导运行人员的操作，其实时性克服了传统分析方法严重滞后的缺点，对提高电厂运行的经济性和安全性起到了重要作用，具有很好的推广价值。“,”Based on the ever-increasing requirements on the power plant running economy and the operation management, an energy-loss monitoring and analysis system for the power plant is designed. The operation practice of the system has proved its validity. It not only can monitor on-line the running state of power plant, but also can diagnose units running economy by energy-loss analysis to provide operating instruction for the operators. The system realizes the real-time monitoring and analysis, provides guidance for equipment maintenance, and improves the power plant running and management.