发明名称 |
IMPROVED LINE CURRENT DIFFERENTIAL PROTECTIVE RELAYING METHOD AND RELAY FOR IN-ZONE TAPPED TRANSFORMERS |
摘要 |
A method for providing protective control to a tapped line in a power system, comprises the steps of measuring one or more local currents in a first protection element ; receiving, in the first protection element, one or more remote current measurements from a second protection element ; calculating one or more differential currents based on the local and remote current measurements ; calculating one or more restraining currents based on the one or more differential currents ; outputting a first protective control signal based on the differential currents and the restraining currents ; determining one or more zero sequence currents ; subtracting the zero sequence currents from the local and remote current measurements to generate modified current measurements ; calculating one or more modified differential currents from the modified current measurements ; calculating one or more modified restraining currents from the modified current measurements ; and outputting a second protective control signal based on the modified differential currents and the modified restraining currents. |
申请公布号 |
EP1275184(A2) |
申请公布日期 |
2003.01.15 |
申请号 |
EP20010928441 |
申请日期 |
2001.04.10 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
KASZTENNY, BOGDAN, Z.;CAMPBELL, COLIN, BRUCE |
分类号 |
H02H3/30;H02H3/40;H02H7/22;H02H7/26;(IPC1-7):H02H3/40 |
主分类号 |
H02H3/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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