变压器故障在线智能诊断系统

【作者】 邓宇；

【导师】 罗安；

【作者基本信息】 中南大学 ， 控制理论与控制工程， 2005， 硕士

【摘要】 本文研究了故障诊断理论及其在变压器故障在线诊断中的应用。文章首先简要介绍了变压器智能在线诊断技术的意义、国内外发展现况和展望;然后详细介绍了整个系统的设计方案及其工作方式;系统地阐述了诊断理论和各种诊断方法;接着结合电力变压器故障诊断的具体情况,较为深入地分析了诊断理论用于电力系统变压器在线故障诊断时的具体实现方法,并在信息融合思想的指导下,分析比较各种诊断方法的诊断特点和结果后,提出了一个集成诊断模型;最后,着重对诊断软件的实现进行了详尽的论述,包括软件开发平台的确定、软件结构的设计、功能的实现以及用到的关键技术和开发过程中碰到的一些问题与解决方法。 该系统在线监测变压器的故障特征信息,在这些信息的基础上利用诊断算法对变压器的故障进行诊断。整个系统分为三个大模块:信息采集模块,数据管理模块,故障诊断模块;信息采集模块中运用了油气分离技术和智能传感器阵列,在保证系统诊断功能实现的同时,简化了系统,增强了系统的可维护性;数据管理模块实现了数据录入、数据导出、数据查询和安全管理等功能;诊断模块是以集成诊断模型的形式出现;利用决策融合网络将基于不同诊断机理与方法的诊断子模块进行融合,提高了诊断确诊率。此外,该系统有着功能齐全、界面友好、便于操作、适用性强的优点,本系统将在湖南省超高压输变电公司进行实际应用,为提高电网的可靠性,提高电力系统自动化水平作出贡献。更多还原

【Abstract】 The paper introduces the diagnostic theory and its application to transformer faults online diagnosis. At first, the importance of transformer faults online diagnosis technology and its development actuality are given briefly, the structure of the whole system and its work mechanism are introduced detailedly;Then the diagnostic theory is discussed systematically;combined with the reality of power transformer faults online diagnosis, the realization of methods of transformer faults diagnosis are presented in detail, all these methods are analysed and compared through simulation experiments and a new integrated diagnostic model is presented based on these methods;At last, the realization of the software is discussed including its structure, functions and key techniques.The system comprises three main sub-module including information collection module, data management module, faults diagnosis module. Data management module integrated the functions of data input, data output, data querying and security management. In faults diagnosis module, integrated diagnostic module is presented. The diagnostic precision is improved by the decision-making fusion network in which all diagnostic sub-modules based on different theories and mechanisms are fused. Additionally, the system has a friendly interface which make it convenient to operate. The system will be used in Hunan Electric Power Bureau and will contribute to the security of electric power network.更多还原