The analysis of dissolved gas in transformer oil is a means and method of transformer fault prediction.

利用运行变压器油中溶解气体组分含量的组成与变化来判断变压器是否存在潜伏性故障，了解掌握其运行状况，是电力系统中有效、经济的技术监督手段。

It is an effective and economic technical supervision means in power system to judge whether there is latent fault of transformer by using the composition and change of dissolved gas content in transformer oil, and to understand and master its operation status.
           

而取油样是整个变压器油气体分析过程中重要的环节之一。所取油样从取样到分析过程中，油中溶解气体应尽可能保持不变。目前现场油中溶解气体取样紧急时，时常缺少取样设备，经常采用试剂瓶取样方法，油直接溢流至瓶中。取样瓶有内塞瓶、磨口瓶，运输方式也有非避光和常温保存方式，不同的取样方法都有可能影响气体分析的检测结果。

Oil sampling is one of the important links in the whole process of transformer oil and gas analysis. The dissolved gas in the oil should be kept as constant as possible from sampling to analysis. At present, when the dissolved gas in the oil is sampled urgently, the sampling equipment is often lacking, and the sampling method of reagent bottle is often used, and the oil directly overflows into the bottle. Different sampling methods may affect the results of gas analysis.