利用气相色谱分析诊断变压器的故障原理

Principle of Diagnosing Transformer Faults using Gas Chromatography Analysis

变压器在电力系统中起到了电压转换、电流变换、阻抗变化、稳压及隔离的作用。但随着变压器运行时的高温,会导致绝缘油老化和绝缘材料损坏的直接原因。绝缘油和固态绝缘在逐渐老化的过程中,会裂解生成气体,而这些气体在一定的条件下都稀释在绝缘油中,因此通过对绝缘油检测分析,根据气体含量可直接判断变压器内部运行情况。所以利用气相色谱分析法是一种简洁、快速判断变压器内部的重要方法。

Transformers play a role in voltage conversion,current conversion,impedance variation,voltage stabilization,and isolation in the power system.However,the high temperature during transformer operation is the direct cause of insulation oil aging and insulation material damage.During the gradual aging process of insulating oil and solid insulation,gases will be generated by cracking,and these gases will be diluted in the insulating oil under certain conditions.Therefore,by detecting and analyzing the insulation oil,the internal operation of the transformer can be directly judged based on the gas content.Gas chromatography analysis is an important method for concise and rapid determination of the interior of transformers.