专利内容由知识产权出版社提供
专利名称：TRANSIENT PROTECTION FOR MULTI-TERMINAL HVDC GRID
发明人：CHRISTIAN BLUG,GUENTER EBNER,LI
SHANG-JAEGER,KAI TRUNK,KLAUSWUERFLINGER,MARCUS ZELLER
申请号：US15321828申请日：20140627
公开号：US20170133834A1公开日：20170511
专利附图：
摘要：A method and a device provide protection for a multi-terminal HVDC grid
against faults. The method includes measuring a DC displacement voltage having apolarity and a value, determining if a short circuit fault exists by comparing the DCdisplacement voltage with a threshold displacement voltage and identifying a fault typebased on the polarity and the value of the DC displacement voltage. The disclosed devicecontains a converter having a positive pole and a negative pole, a DC-switch substation, aDC line connecting the converter and the DC-switch substation and a transient faultdetector. The transient fault detector contains a positive voltage sensor sensing apositive transient voltage of the positive pole and a negative voltage sensor sensing anegative transient voltage of the negative pole and a control unit which is adapted toderive a DC displacement voltage from the positive and the negative transient voltages.
申请人：SIEMENS AKTIENGESELLSCHAFT
地址：MUENCHEN DE
国籍：DE
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