Distribution cable insulation dielectric loss factor solving method for on-line monitoring

The invention discloses a power distribution cable insulation dielectric loss factor solving method for online monitoring, which comprises the following steps of: obtaining a phase difference by solving an arc cosine function according to the steps, obtaining a phase difference according to the steps, obtaining a phase difference according to the steps, obtaining a phase difference and obtaining a phase difference; acquiring a cable starting end voltage complex effective value and a cable tail end voltage complex effective value; obtaining + according to the (+) sum, and then solving a phase difference beta between the (+) sum and the (+) sum according to the (+) sum; and according to beta, delta is solved, and a tangent value tan delta is obtained and is the solved insulation dielectric loss factor of the distribution cable. According to the distribution cable insulation dielectric loss factor solving method for online monitoring, a method is provided for online monitoring of the distribution cable insulatio