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The insulation coordination of the UHVDC converter station is important for the security and economic of UHVDC system. In this paper we have built the Zhexi station and it's 2kM line in segment's mode, EMTP/PSCAD has been used to analysis the equipment's lightning overvoltage. To analysis the most serious situation, the selection of AC field's operation mode has been discussed in detail, measures...
The external insulation coordination is one of the key technologies in the UHVDC power transmission projects and deserves further studies. External insulation mainly contains two parts, the insulation coordination of insulator and coordination of air gaps in transmission. Some frequently-used types of insulators are selected and compared from their service life and electrical performance. Two widely...
Lightning stroke is the key problem for safe operation of UHV transmission line. Because of the large scale of the tower and the high operation AC voltage, the shielding design of tower became one of the most important aspects of the UHV transmission line design. This paper was based on the typical towers of China 1000 kV AC transmission line: waist-type single-circuit tower, cup-shape single-circuit...
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