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METHOD AND APPARATUS FOR CURRENT DIFFERENTIAL PROTECTION FOR UHVDC TRANSMISSION LINE
METHOD AND APPARATUS FOR CURRENT DIFFERENTIAL PROTECTION FOR UHVDC TRANSMISSION LINE
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机译：特高压直流输电线路电流差动保护的方法和装置
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摘要
Methods and apparatus for current differential protection for UHVDC transmission lines are disclosed. A current differential protection system for a DC transmission line may comprises: a first measurement unit, configured to measure a first current flowing through a first terminal of the DC transmission line; a second measurement unit, configured to measure a second current flowing through a second terminal of the DC transmission line; and a protection unit, configured to remove first and second equivalent shunt branch currents of the DC transmission line respectively from the first and second currents to generate corrected first and second currents; to calculate a differential current based on the corrected first and second currents; and to compare the differential current with a predetermined current setting value to determine whether an internal fault occurs on the DC transmission line.
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