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Diagnostics of the Power Oil-Filled Transformer Equipment of Thermal Power Plants

机译：火电厂电力注油变压器设备的诊断

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摘要

Problems concerning improvement of the diagnostics efficiency of the electrical facilities and functioning of the generation and distribution systems through the examples of the power oil-filled transformers, as the responsible elements referring to the electrical part of thermal power plants (TPP), were considered. Research activity is based on the fuzzy logic system allowing working both with statistical and expert information presented in the form of knowledge accumulated during operation of the power oil-filled transformer facilities. The diagnostic algorithm for various types of transformers, with the use of the intellectual estimation model of its thermal state on the basis of the key diagnostic parameters and fuzzy inference hierarchy, was developed. Criteria for taking measures allowing preventing emergencies in the electric power systems were developed. The fuzzy hierarchical model for the state assessment of the power oil-filled transformers of 110 kV, possessing high degree of credibility and setting quite strict requirements to the limits of variables of the equipment diagnostic parameters, was developed. The most frequent defects of the transformer standard elements, related with the disturbance of the isolation properties and instrumentation operation, were revealed after model testing on the real object. Presented results may be used both for the express diagnostics of the transformers state without disconnection from the power line and for more detailed analysis of the defects causes on the basis of the advanced list of the diagnostic parameters; information on those parameters may be received only after complete or partial disconnection.
机译：作为动力源（TPP）的负责部分，通过充油式电力变压器的实例，考虑了有关改善电气设施的诊断效率以及发电和配电系统功能的问题。研究活动基于模糊逻辑系统，允许使用统计和专家信息进行工作，这些信息和信息以在电力油浸式变压器设施运行期间积累的知识形式呈现。在关键诊断参数和模糊推理层次的基础上，利用其热状态的智能估计模型，开发了各种类型的变压器诊断算法。制定了采取措施防止电力系统出现紧急情况的标准。建立了可靠性高，对设备诊断参数变量范围的要求非常严格的110 kV电力油浸式变压器状态评估的模糊层次模型。在对实物进行模型测试后，发现了变压器标准元件中最常见的缺陷，即与隔离性能和仪表操作的干扰有关。呈现的结果既可以用于不断开电源线的变压器状态的快速诊断，也可以用于基于诊断参数高级列表的更详细的缺陷原因分析；仅在完全或部分断开连接后，才能接收有关这些参数的信息。

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