Download Print this page

Siemens 7SA513 Instruction Manual page 76

Numerical distance protection for ehv systems
Hide thumbs Also See for 7SA513:

Advertisement

6$
9

8QEORFNLQJ PRGH ZLWK =%
7KH XQEORFN PRGH LV D UHOHDVLQJ SURFHGXUH =RQH
=% LV VHW WR UHDFK EH\RQG WKH QH[W VWDWLRQ 7KH GLI
IHUHQFH IURP SHUPLVVLYH RYHUUHDFK WUDQVIHU WULS ZLWK
=% 6HFWLRQ  LV WKDW D WULS FRPPDQG LV DOVR
SRVVLEOH ZKHQ QR UHOHDVH VLJQDO LV UHFHLYHG IURP WKH
RSSRVLWH HQG ,W LV WKHUHIRUH SULQFLSDOO\ XVHG IRU ORQJ
OLQHV ZKHQ WKH VLJQDO KDV WR EH WUDQVPLWWHG RYHU WKH
SURWHFWHG OLQH XVLQJ D 3/& V\VWHP DQG WKH GDPSLQJ
RI WKH WUDQVPLWWHG VLJQDO FDQ EH VR ODUJH DW WKH SRLQW
RI IDXOW WKDW LWV UHFHLSW IURP WKH RWKHU OLQH HQG FDQQRW
EH XQFRQGLWLRQDOO\ JXDUDQWHHG )RU WKLV SDUWLFXODU
FDVH D VSHFLDO XQEORFNLQJ ORJLF FRPHV LQWR RSHUD
WLRQ
)LJXUH  VKRZV D VLPSOLILHG EORFN VFKHPH RI WKLV
IXQFWLRQ
)DXOW GHWHFWLRQ

)DXOW GHW

=%
=%

7%
)RUZ
GLUHF
= DQG
IXUWKHU
]RQHV
8QEORFN
5
ORJLF
=%
)DXOW LQ RYHUUHDFK ]RQH =%
)RUZGLUHF
)DXOW LQ SDUDPHWHUL]HG GLUHFWLRQ
7
7UDQVPLWWHU
5
5HFHLYHU
)LJXUH 
8QEORFNLQJ PRGH ZLWK =%  EORFN VFKHPH


=

7
G
7
8
7
V
!
7ULS
8
5
)
)RU VLJQDO WUDQVPLVVLRQ RQH UHTXLUHV WZR VLJQDO IUH
TXHQFLHV ZKLFK DUH VKLIWHG RYHU IURP WKH WUDQVPLWWHU
RXWSXW LQ 6$ ,I WKH 3/& V\VWHP LQFRUSRUDWHV
FKDQQHO PRQLWRULQJ HJ 6LHPHQV YRLFH IUHTXHQF\
XQLW 6:7  ) WKHQ WKH PRQLWRULQJ IUHTXHQF\ I
VZLWFKHG WR D ZRUNLQJ IUHTXHQF\ ,I WKH UHOD\ GHWHFWV
D IDXOW ZLWKLQ WKH RYHUUHDFK ]RQH =% LW LQLWLDWHV
WUDQVPLVVLRQ RI WKH ZRUNLQJ IUHTXHQF\ I
LQJ IUHTXHQF\ FDQ EH GHOD\HG E\ 7
FRQGLWLRQV RU ZLWK D IDXOW RXWVLGH WKH =% ]RQH RU LQ
WKH GLUHFWLRQ RSSRVLWH WR WKDW VHW WKH PRQLWRULQJ IUH
TXHQF\ I
LV WUDQVPLWWHG

=

=%
7
8
7
V
!
7ULS
8
5
)
7%
'HOD\ RI RYHUUHDFK ]RQH QRUPDOO\ 
7
'HOD\ RI WUDQVPLVVLRQ VLJQDO
G
7
3URORQJDWLRQ RI WUDQVPLVVLRQ VLJQDO
V
0HWKRG RI RSHUDWLRQ
XQEORFN
8
 8QGHU QRUPDO
G

)DXOW GHW

)DXOW GHWHFWLRQ

=%
7
G

7%
)RUZ
GLUHF
= DQG
IXUWKHU
]RQHV
8QEORFN
5
ORJLF
&*&
LV


Advertisement

loading