Chromatographic analysis is to obtain the composition and content of each gas in transformer oil by gas chromatography.

当变压器处于正常运行的过程中，其组成物质的性能会随着变压器运行时间的增长而逐渐减退甚至是丧失，其中的绝缘材料变压器油在运行过程中会逐渐地分解出少量的化学气体。油中分解出来的气体形成气泡，在油流经或扩散的时候逐渐地在油里溶解，就会对变压器的正常运行造成阻碍和影响。

When the transformer is in the process of normal operation, the performance of its components will gradually decline or even lose with the increase of transformer operation time, and the insulating material transformer oil will gradually decompose a small amount of chemical gas in the process of operation. The gas decomposed from the oil will form bubbles and gradually dissolve in the oil when the oil flows through or diffuses, which will hinder and affect the normal operation of the transformer.
          

当这种气体的数量已经远远超过了溶解的数量，而且没有及时得到解决和处理的气体则会进入到变压器的内部，使继电器发生移动，导致故障的产生，影响变压器的正常运行，给变压器的运行过程中埋下了风险隐患。

When the amount of this kind of gas has far exceeded the dissolved amount, and has not been solved and treated in time, the gas will enter into the interior of the transformer, causing the relay to move, resulting in the occurrence of faults, affecting the normal operation of the transformer, and burying hidden risks in the operation process of the transformer.

因此在故障发生的初期阶段，内部的温度还没有处于过高的状态，所存在的气体含量相对较少，此时如果能够全 面、严谨地对油中气体的组成成分进行分析和研究，含量的多少和发展的程度，就可以查出变压器内部潜伏的故障，采取措施阻止事故的发生。

At this time, the internal fault of the transformer can be prevented if there is no comprehensive analysis of the internal gas content and the development stage of the fault.