变压器状态检修的研究与应用-电气工程专业论文.docx

PAGE PAGE 3 HYPERLINK \l _bookmark0 5．1 本文总结 40 HYPERLINK \l _bookmark0 5．2 取得的成效 40 HYPERLINK \l _bookmark0 5．3 研究展望 40 HYPERLINK \l _bookmark1 致 谢 42 HYPERLINK \l _bookmark2 参考文献 43 HYPERLINK \l _bookmark3 附 录 45 摘 要 本文系统的分析了当前变压器实施状态检修的必要性和可靠性，指出在当前在线监 测设备尚未完全普及的情况下，科学有效地利用现有变压器状态信息是实现变压器状态 维修的基础。因此本文针对当前普遍施行的变压器预防性试验情况，对变压器的状态信 息进行了系统的分析，得到了变压器状态评估所需的各种信息的分类和特征。 本文结合遵义供电局的运行实际，以油浸式变压器为例，采用油色谱分析法对变压 器绝缘状态进行检测。变压器油色谱在线监测系统是通过测量H2、CO、CH2、C2H4、C2H6、 C2H2等油中溶解气体的含量及其变化趋势，在运行条件下实现对变压器绝缘状态的监测。 根据变压器状态分析结果制定出了变电设备状态检修的评估导则。该导则采用100 分制，并按变压器各部件的重要程度赋以不同的权重，然后根据评分结果按量化分值的 大小分为“良好状态” 、“正常状态”、“注意状态”、“异常状态”和“重大异常 状态”五个状态。 实例证明，本文所制定的变压器状态检修评价导则能对电力变压器的运行状态进行 有效的评估，对变压器实际的检修安排具有指导意义，为开展电力变压器的状态检修打 下了良好的基础。 关键词: 变压器；状态检修；实时数据库； Abstract The dissertation points out that efficiently and scientifically applying transformer condition information is the basis for the transformer maintenance in case online detecting devices are not prevalent. Then, the dissertation systematically analyzes the information acquired in transformer precaution tests and reaches its classification and characteristics needed for evaluating the transformer conditions. According to the actual operation of Zunyi Power Supply Bureau, taking the oil-immersed transformers for example, the dissertation use Gas Analysis(DGA)，as one of the most useful techniques to detect incipient faults，to realize the insulation condition monitoring for Power transformers. Based on DGA，an oil chromatograph on-1ine monitoring system for transformer is developed. The system mainly measures the volume content and trend of the fault-related gases include H2，CO，CH4，C2H2，C2H4，and C2H6. Guidelines of transformer maintenance are made based on state analysis of transformer. It scores the transformer’s health by 100-scale and values the parts of transformer with difference weight, and then divides the results to five states: good, normal, attention, abnormal and significant abnormal. The effectiveness of this assessm