发明公开
- 专利标题： METHOD AND ARRANGEMENT FOR CAPACITOR BANK PROTECTION
- 专利标题（中）： 方法和系统电容器组的保护
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申请号： EP11729385.2申请日： 2011-05-26
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公开(公告)号： EP2596564A1公开(公告)日： 2013-05-29
- 发明人: GAJIC, Zoran
- 申请人： ABB Technology AG
- 申请人地址： Affoltern Strasse 44 8050 Zürich CH
- 专利权人： ABB Technology AG
- 当前专利权人： ABB Technology AG
- 当前专利权人地址： Affoltern Strasse 44 8050 Zürich CH
- 代理机构： Ahrengart, Kenneth
- 优先权： US367052P 20100723
- 国际公布： WO2012010353 20120126
- 主分类号： H02H7/16
- IPC分类号： H02H7/16 ; H02J3/18
摘要：
The present invention relates to a method for protecting against a failure within a multi-phase capacitor bank (1 ) comprising a plurality of capacitor units (30, U1
1 ,...,U1
i , U1
i+1 , U2
1 ,...,U2
i , U2
i+1 , U3
1 ,...,U3
i , U3
i+1 ) each comprising a plurality of capacitor elements (40) connected to each other, wherein capacitor units are connected to each other and the failure may involve two neighboring capacitor units. The method comprises steps of measuring the current of each individual phase of the capacitor bank (100), calculating the magnitude of an unbalanced current (I
unbalanced ) based on the measured currents (110), measuring the voltage of each individual phase of the capacitor bank (120), calculating the magnitude of an unbalanced voltage (U
unbalanced ) based on the measured voltages (130), determining an operating point (U
unbalanced , I
unbalanced ) based on the calculated the magnitudes of the unbalanced current and the unbalanced voltage (140), examining where the defined operating point (U
unbalanced , I
unbalanced ) is located in a specified operating region (150), and initializing a trip signal based on the location of the defined operating point (U
unbalanced , I
unbalanced ) in the specified operating region (190, 190').
1 ,...,U1
i , U1
i+1 , U2
1 ,...,U2
i , U2
i+1 , U3
1 ,...,U3
i , U3
i+1 ) each comprising a plurality of capacitor elements (40) connected to each other, wherein capacitor units are connected to each other and the failure may involve two neighboring capacitor units. The method comprises steps of measuring the current of each individual phase of the capacitor bank (100), calculating the magnitude of an unbalanced current (I
unbalanced ) based on the measured currents (110), measuring the voltage of each individual phase of the capacitor bank (120), calculating the magnitude of an unbalanced voltage (U
unbalanced ) based on the measured voltages (130), determining an operating point (U
unbalanced , I
unbalanced ) based on the calculated the magnitudes of the unbalanced current and the unbalanced voltage (140), examining where the defined operating point (U
unbalanced , I
unbalanced ) is located in a specified operating region (150), and initializing a trip signal based on the location of the defined operating point (U
unbalanced , I
unbalanced ) in the specified operating region (190, 190').
公开/授权文献
- EP2596564B1 METHOD AND ARRANGEMENT FOR CAPACITOR BANK PROTECTION 公开/授权日：2014-03-19
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