专利名称：Method and arrangement to reverse the
power flow of a direct current powertransmission system
发明人：Ulf Radbrandt申请号：US12531399申请日：20070315公开号：US08203856B2公开日：20120619
专利附图：
摘要：A direct current power transmission system includes a first and a secondconverter station that are coupled to each other via a direct current link. Each converter
station includes a first or second line commutated converter, respectively. Before powerreversal the first converter is operated as a rectifier and the direct current is controlled inthe first station, while the second converter is operated as an inverter and in the secondstation the extinction angle of the second converter or the direct voltage is controlled.After power reversal, the first converter is operated as an inverter and the secondconverter as a rectifier. During power reversal a change is carried out in the first stationfrom control of the direct current to control of the extinction angle of the first converteror to control of the direct voltage, which is performed in synchronization with a change inthe second station from control of the extinction angle of the second converter or fromcontrol of the direct voltage to control of the direct current.
申请人：Ulf Radbrandt
地址：Sunnansjö SE
国籍：SE
代理机构：Venable LLP
代理人：Eric J. Franklin
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