百万超超临界汽轮机本体能效评价与诊断方法的研究

发布时间：2018-10-12 08:37

【摘要】：鉴于国家对火电发展的要求越来越高,如何有效地提高火电厂运行的能源利用效率成为火电行业发展的重要课题。因此对火电厂状态监测、能效评价与能效异常诊断方法的研究在现阶段显得十分重要。本文对百万负荷超超临界汽轮机本体的能效评价与诊断方法进行了深入的研究。主要解决以下几个重点问题:1、能效监测方案设计。如何准确、有层次地对获取本体实时运行状态是监测方案设计的难点。因此我们采用分层分析的方法建立监测指标树,并预先对指标计算的数学模型进行研究。2、能效评价方法的研究。能效评价有两个核心问题。第一是评价参数耗差因子的计算。第二是参数基准状态的获取。不能准确计算出参数耗差因子,我们就无法得到指标偏离基准状态时的节煤潜力,能效评价的实施就是一句空话。参数基准状态的获取是评价的难点,本文借助数据挖掘与热力计算相结合的方法解决这一核心问题。3、能效异常诊断方法研究。当监测到能效指标发生异常,对异常模式、引发异常的原因与处理措施的研究就显得至关重要。4、设计并辅助开发超超临界汽轮机本体能效评价与异常诊断系统。一切理论研究都需要工程应用的检验。因此,能效评价与异常诊断系统的设计、开发、工程实现方面的研究也具有十分重要的理论意义与实践价值。
[Abstract]:In view of the increasingly high demand for the development of thermal power, how to effectively improve the efficiency of energy utilization of thermal power plants has become an important issue in the development of thermal power industry. Therefore, it is very important to study the methods of state monitoring, energy efficiency evaluation and abnormal diagnosis of energy efficiency in thermal power plants. In this paper, the energy efficiency evaluation and diagnosis method of supercritical steam turbine with one million load is studied. Mainly solve the following key problems: 1, energy efficiency monitoring program design. How to accurately and hierarchically obtain the real-time running state of ontology is a difficult point in the design of monitoring scheme. Therefore, we use the hierarchical analysis method to establish the monitoring index tree, and study the mathematical model of index calculation in advance. 2, the research of energy efficiency evaluation method. There are two core issues in energy efficiency evaluation. The first is the calculation of the loss factor of the evaluation parameters. The second is the acquisition of parameter datum state. If the parameter consumption difference factor can not be calculated accurately, we can not get the coal saving potential when the index deviates from the reference state. The implementation of energy efficiency evaluation is empty talk. The acquisition of parameter reference state is a difficult problem in evaluation. This paper solves this core problem by means of data mining and thermodynamic calculation. 3. Research on energy efficiency anomaly diagnosis method. When the energy efficiency index is abnormal, it is very important to study the abnormal mode, the cause of the anomaly and the treatment measures. 4. The energy efficiency evaluation and anomaly diagnosis system of ultra supercritical steam turbine body is designed and developed. All theoretical research needs the test of engineering application. Therefore, the research on the design, development and engineering realization of energy efficiency evaluation and anomaly diagnosis system also has very important theoretical significance and practical value.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM621.3

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