| 摘要 |
1,007,159. Converting. LICENTIA PATENTVERWALTUNGS-G.m.b.H. Dec. 15, 1961 [Dec. 19, 1960; April 20, 1961], No. 45024/61. Heading H2F. In a high voltage direct current power transmission system each of two transmission cables 5, 6 is connected to a current converter 2 through an isolating switch 3, 4. The isolating switches are of the change-over type to permit reverse power flow. In operation, the converter is controlled to zero current flow before the switches are operated. |
