变压器油中溶解气体的分析与故障诊断研究
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摘要
变压器作为电力系统最主要的供电设备,其可靠运行程度直接关系到电力系统电网的安全运行。油中溶解气体气相色谱分析是变压器内部故障的重要检测手段。随着电网的发展和运行电压的提高,油中溶解气体气相色谱分析技术也不断改进。根据变压器内部析出的气体可以分析出变压器的潜伏性故障,特别是对过热性、电弧性和绝缘破坏性故障,不管故障发生在变压器什么部位,都能很好的反映出来。气相色谱法分析变压器油中溶解气体,对变压器的故障进行诊断和预测,是实现变压器状态维修的一项非常有意义的工作。
     本文针对江苏某发电有限公司和连云港供电公司变压器油中溶解气体气相色谱分析的应用进行了研究。论文在对国内外气相色谱分析监测及诊断技术的现状深入分析的基础上,充分论述了油中溶解气体产生的机理及油中气相色谱组分与故障类型的关系。论文对故障诊断的特征气体法和特征气体的比值法及其应用做了详细的论述。认真研究了色谱分析中误差产生的原因,并提出了相应的解决办法。论文对变压器油气相色谱在线监测技术也做了论述。
As the principal power supply equipment in the power system, transformer's safely function will be directly related with the operation of the power network. It is an important method to detect the interior breakdown of transformer through dissolving the gas chromatography in the oil. With the development of power network and the improvement of voltage, the technology of dissolving gas chromatography is also improved.
    According to the gas separated out of the interior of the transformer, the hidden trouble in the transformer can be analyzed, especially it's overheat, electric arc and insulation. Gas chromatography can analyze the dissolving gas of the oil in the transformer and can diagnose and predict the trouble in the transformer, which is a very significant work to fulfil the maintenance of the transformer.
    This paper does research on the application of dissolving gas chromatography in the oil of transformer in one of Jiansu Power Plants and Lianyungang Power Supply Company. Based on analyzing status quo of the technology of monitoring and diagnosis on the gas chromatography inside and outside the country, the paper fully illustrates the relationship between the mechanism of dissolving gas of the oil and the types of hitch. It also illustrates detailedly the characteristic gas method of trouble-diagnosis and the ratio method of the characteristic gas and their application. It earnestly researches into the error causes in the chromatographic analysis and gave the proper solutions.
引文
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