Toshiba GR200 Series Instruction Manual page 524

Line differential protection ied
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In Figure 2.36-7, the slave IED_H sends a timing reference signal at point (1). The master
IED_G receives this signal at point (2). You can find that the master IED_G replies this signal
at point (3). Finally, at point (4), this signal reverts to the slave IED_H again. When the δ is
placed in Figure 2.36-7, the following equation is obtained with the T d1 , the T d2 , and the T M :
The δ is delivered with the T and the T M as follows:
Substituting Equation (2.36-5) and Equation (2.36-3) for Equation (2.36-4) yields
The T d1 calculated is distributed into the T and the T M , as can be seen from Figure
2.36-7. The mantissa is truncated and the quotient is expressed as an integer. If the integer is
set to "P", the reception at the slave IED_H of the signal sent from the master IED_G occurs
at P sampling intervals from the transmission. Accordingly, by performing control so that the
sampling address of the slave IED_H equals integer P when the sampling address is 0 signal
is received from the master IED_G, the sampling address of the slave IED_H can be made the
same as the master IED_G.
T
− δ = T
+ T
o
d1
d2
δ = T − T
M
− ( T − T
)
T
o
m
T
=
+
d1
2
- 501 -
6F2S1914 (0.49)
T
dd
2
GRL200 (Soft 033 & 037)
(2.36-4)
(2.36-5)
(2.36-6)

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