Download Print this page

Siemens SIPROTEC 7SA511 Instruction Manual page 102

Numerical distance protection relay

Advertisement

6$
9
 6RIWZDUH PRQLWRULQJ
)RU FRQWLQXRXV PRQLWRULQJ RI WKH SURJUDP VH
TXHQFHV D ZDWFKGRJ WLPHU LV SURYLGHG ZKLFK ZLOO UH
VHW WKH SURFHVVRU LQ WKH HYHQW RI SURFHVVRU IDLOXUH RU
LI D SURJUDP IDOOV RXW RI VWHS )XUWKHU LQWHUQDO SODXVL
ELOLW\ FKHFNV HQVXUH WKDW DQ\ IDXOW LQ SURFHVVLQJ RI
WKH SURJUDPV FDXVHG E\ LQWHUIHUHQFH ZLOO EH UHFRJ
QL]HG 6XFK IDXOWV OHDG WR UHVHW DQG UHVWDUW RI WKH SUR
FHVVRU
,I VXFK D IDXOW LV QRW HOLPLQDWHG E\ UHVWDUWLQJ IXUWKHU
UHVWDUWV DUH LQLWLDWHG ,I WKH IDXOW LV VWLOO SUHVHQW DIWHU
WKUHH UHVWDUW DWWHPSWV WKH SURWHFWLYH V\VWHP ZLOO
VZLWFK LWVHOI RXW RI VHUYLFH DQG LQGLFDWH WKLV FRQGLWLRQ
E\ GURSRII RI WKH DYDLODELOLW\ UHOD\ WKXV LQGLFDWLQJ
kHTXLSPHQW IDXOWl DQG VLPXOWDQHRXVO\ WKH /('
k%ORFNHGl FRPHV RQ
 0RQLWRULQJ RI H[WHUQDO PHDVXULQJ
WUDQVIRUPHU FLUFXLWV
7R GHWHFW LQWHUUXSWLRQV RU VKRUW FLUFXLWV LQ WKH H[WHU
QDO PHDVXULQJ WUDQVIRUPHU FLUFXLWV RU IDXOWV LQ WKH
FRQQHFWLRQV DQ LPSRUWDQW FRPPLVVLRQLQJ DLG WKH
PHDVXUHG YDOXHV DUH FKHFNHG DW F\FOLF LQWHUYDOV DV
ORQJ DV QR SLFNXS FRQGLWLRQ H[LVWV
 &XUUHQW V\PPHWU\
,Q KHDOWK\ RSHUDWLRQ LW FDQ EH H[SHFWHG WKDW WKH
FXUUHQWV ZLOO EH DSSUR[LPDWHO\ V\PPHWULFDO 7KH
IROORZLQJ DSSOLHV
_ ,
_  _ ,
PLQ
PD[
LI
,
 ,
! 6<0,WKUHV  ,
PD[
1
,
LV DOZD\V WKH ODUJHVW RI WKH WKUHH SKDVH FXU
PD[
UHQWV DQG ,
DOZD\V WKH VPDOOHVW 7KH V\PPHWU\
PLQ
IDFWRU 6<0)DFW, UHSUHVHQWV WKH PDJQLWXGH RI
DV\PPHWU\ RI WKH SKDVH FXUUHQWV DQG WKH WKUHVK
ROG 6<0,WKUHV LV WKH ORZHU OLPLW RI WKH SURFHVVLQJ
DUHD RI WKLV PRQLWRULQJ IXQFWLRQ VHH )LJXUH  
%RWK SDUDPHWHUV FDQ EH VHW VHH 6HFWLRQ  

_  6<0)DFW,
1
,
PLQ
,
1
6<0,WKUHV
)LJXUH 
&XUUHQW V\PPHWU\ PRQLWRULQJ
 9ROWDJH V\PPHWU\
,Q KHDOWK\ RSHUDWLRQ LW FDQ EH H[SHFWHG WKDW WKH
YROWDJHV ZLOO EH DSSUR[LPDWHO\ V\PPHWULFDO
7KHUHIRUH WKH GHYLFH FKHFNV WKH WKUHH SKDVHWR
SKDVH YROWDJHV IRU V\PPHWU\ 0RQLWRULQJ RI WKH
VXP RI WKH SKDVHWRSKDVH YROWDJHV LV QRW LQ
IOXHQFHG E\ HDUWK IDXOWV ZKLFK FDQ EH D ODVWLQJ
RSHUDWLQJ FRQGLWLRQ LQ QRQHDUWKHG QHWZRUNV
7KH IROORZLQJ DSSOLHV
_ 8
_  _ 8
PLQ
PD[
LI
_ 8
_ ! 6<08WKUHV
PD[
ZKHUHE\ 8
LV WKH ODUJHVW RI WKH WKUHH YROWDJHV
PD[
DQG 8
WKH VPDOOHVW 7KH V\PPHWU\ IDFWRU
PLQ
6<0)DFW8 UHSUHVHQWV WKH PDJQLWXGH RI WKH
DV\PPHWU\ RI WKH VXP RI WKH YROWDJHV 7KH WKUHVK
ROG 6<08WKUHV LV WKH ORZHU OLPLW RI WKH SURFHVVLQJ
DUHD RI WKLV PRQLWRULQJ IXQFWLRQ VHH )LJXUH  
%RWK SDUDPHWHUV FDQ EH VHW VHH 6HFWLRQ 
8
PLQ
8
1
6<08WKUHV
)LJXUH 
9ROWDJH V\PPHWU\ PRQLWRULQJ
0HWKRG RI RSHUDWLRQ
6ORSH
6<0)DFW,
,
PD[
,
1
_  6<0)DFW8
6ORSH
6<0)DFW8
8
PD[
8
1
&*&

Advertisement

loading