Study on Analysis Method of Zinc Oxide Line Arrester Fracture

The operation experience shows that the zinc oxide line arrester fracture is a common fault due to instantaneous large current. In view of the difficulties in the fracture analysis of zinc oxide line arresters, a highly reliable, objective, scientific and practical fracture prediction method for zinc oxide line arresters is proposed. Calculate that maximum pulse power of the zinc oxide valve plate by operate a nonlinear time domain method according to the waveform data of the obtained lightning current and the nonlinear resistance model of the lightning arrester; According to the internal crack defect data of the zinc oxide varistor and the calculated maximum pulse power, the fracture of the zinc oxide line arrester is predicted. Finally, a case study is given to illustrate the effectiveness of the proposed method. The work of this paper can provide an effective reference for the operation and maintenance of line arrester.