ПЕРЕНАПРУГИ ПІД ЧАС ДУГОВИХ ОДНОФАЗНИХ ЗАМИКАНЬ НА ЗЕМЛЮ В ЕЛЕКТРИЧНИХ МЕРЕЖАХ 35 КВ

The study results of overvoltages during arc single-phase earth faults of intermittent nature in the 35 kV electric net-work with isolated neutral are presented. With the help of computer simulations of transients in the electrical network, the maximum multiplicities of overvoltages at the point of occurrence of single-phase arc earth faults have been ob-tained. According to known theories of the occurrence and development of overvoltages, it exceeds theoretically ex-pected. The change of the overvoltage level on the 35 kV busbars of the network substations, electrically connected to the place of occurrence of the single-phase earth fault, has been shown. The influence of the cable line on the overvolt-age multiplicity is shown. Ref. 12, fig. 3, table.