Download - Bus Bar Diff
Transcript
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7/21/2019 Bus Bar Diff
1/8
DBN 1
Bus differential
protection
Fundamental ideas
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2/8
DBN 2
I2p
I3p
I1p
I4p
I5p
Load condition
p3Ip5Ip4Ip2Ip1I
0= pIi
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7/21/2019 Bus Bar Diff
3/8
DBN 3
I2p
I3p
I1p
I4p
I5p
External fault
IfaultpIpIpIpIpI ==+++ 54321
0= pIiIfault
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7/21/2019 Bus Bar Diff
4/8
DBN 4
I2p
I3p
I1p
I4p
I5p
Internal fault
IfaultpIpIpIpIpI =++++ 54321
IfpIi =
Ifault
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7/21/2019 Bus Bar Diff
5/8DBN 5
External fault with saturation
I1p
I5p
IfaultpIpI == 51
0= pIi
Ifault
I1r
I1m0
I5m0
I5r
I1s
I5s
r5Im5Is5I
s1Ir1I
0555151 =+=+== mImIsIsIrIrIsIIdiff i
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7/21/2019 Bus Bar Diff
6/8DBN 6
Internal fault
I1p
I5p
IfaultpIpI =+ 51
0 pIi
Ifault
I1r
I1m0
I5m
0
I5r
I1s
I5s
sIrI 55 =
s1Ir1I
051 +== rIrIsIIdiff i
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7/21/2019 Bus Bar Diff
7/8DBN
Im
!m
RsIrVm
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7/21/2019 Bus Bar Diff
8/8DBN "
#han$s %ou for %our attention&