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Monopole ESOF test of Yun-Guang UHVDC under islanded operation
Pages: 146-149
Year: Issue:  7
Journal: Relay

Keyword:  UHVDCislanded operationmonopoleESOF testover voltagecontrol mode;
Abstract: On May 26, 2013, monopole ESOF test of Yun-Guang UHVDC under islanded operation was conducted. The test shows during islanded operation, when monopole ESOF happened, the generation power and DC transmission power can restore steady state. But, if control mode of DC station control is selected to Q-mode, AC voltage may exceed safe range for a long time, and the AC filter of rectifier may trip by overload, which at last causes FASOF of another running pole. It is concluded when Yun-Guang UHVDC is under islanded operation, Q-mode is forbidden and other tests are necessary for making sure the AC voltage control logics in the present islanded operation is safe enough.
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