超、特高压变压器绝缘油现场快速采样器的研究与应用

变压器油中溶解气体分析是变压器内部故障诊断的重要手段,准确、快速的采集具有代表性的油样是进行油中溶解气体分析的关键步骤,为了进一步提高绝缘油采样技术水平,设计、制造了一种超、特高压变压器绝缘油现场快速采样器,对该采样器进行了密封性、保持性等功能特性研究,开展了与绝缘油传统取样工具(玻璃注射器)的比对应用。研究结果表明,该采样器密封性、保持性均符合国标要求,且优于绝缘油传统取样工具,采样密封性技术指标为2.34 %(每周损失氢气含量)、样品保持性指标不少于7天,较绝缘油传统取样工具人员成本节省50 %、采样工期缩短60 %。

Study and application of quick field sampler for insulation oil of UHV transformer

The dissolved gas analysis (DGA) is an important means of transformer fault diagnosis. Accurate and rapid collection of a representative sample is a key step in the DGA. An EHV and UHV transformer insulation oil field quick sampler was designed and manufactured to improve oil sampling technology. The function characteristics of the sampler such as tightness and maintainability were studied, and the comparison between the sampler and the traditional sampling tool of insulating oil (glass injector) was carried out. The results show that the sampler meets the requirements of national standards for sealing and retention and is better than the traditional sampling tools. The technical index of sealing of sampling is 2.34% (loss of hydrogen content per week), the sample retention is no less than 7 days, which can save 50% of personnel cost. Compared with the traditional sampling tools, the personnel cost is reduced by 50% and the sampling period is shortened by 60%.