Spectral diagnosis method for deterioration state of electric plant insulating oil

The invention discloses a spectrum diagnosis method for a degradation state of electric plant insulating oil, which belongs to the technical field of high-voltage insulation detection, and mainly adopts a terahertz time-domain spectrum technology to collect time-domain spectrum signals which change along with time after a terahertz pulse is reflected on a plant insulating oil interface for multiple times; according to the method, information such as amplitude and phase is obtained after Fourier transform, the complex refractive index, absorption coefficient, extinction coefficient and the like of the insulating oil are obtained through calculation, the relation between the parameters and furfural in the oil is established, and therefore the deterioration state of the insulating oil is obtained, a new method is provided for diagnosing the deterioration state of the insulating oil, and the method can be applied and popularized in the power industry. 本发明公开了一种电力植物绝缘油劣化状态的光谱诊断方法，属于高压绝缘检测技术领域，主要采用太赫兹时域光谱技术，采集太赫兹脉冲在