Toshiba GR200 Series - (i) Synchronism-relays (SyncRy1-dV, SyncRy1-df, SyncRy1-dθ); (i)-1 Voltage-variance (ΔV) (see Figure 4.6-3)

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 800 -
Δ
Δ reducing
Δ increasing
Δ near
zero
V
r
†
V
i
‡
V
i
V
i
V
i
Figure 4.6-4 Permissible ranges for connections between asynchronous networks
†
Note: Vr is the voltage on a running line.
‡
Note: Vi is the voltage on an incoming line.
Table 4.6-3 Settings in SYNCHK_Ry1
Setting Name
Description
Default
Setting item or value
SyncRy1-Angle
Checking angle variance
30 degrees
0 to 75 degrees
SyncRy1-dV
Checking voltage variance
150V
0 to 150 V
SyncRy1-df
Checking frequency variance
1Hz
0.01 to 2 Hz
SyncRy1-TCB
Advance time for SYNCHK01
–
Seconds
SYNC01_TSYN
Sync check timer for loop system
10s
0.00 to 100.00 s
SyncRy1-dfEN
Diff. frequency for the checking SyncRy1 enable
Off
Off / On
(i) Synchronism-relays (SyncRy1-dV, SyncRy1-df, SyncRy1-dθ)
Synchronism-relays, SyncRy1-dV, SyncRy1-df, and SyncRy1-dθ are provided; the setting
ranges for these relays are shown in Table 4.6-3.
Voltage-variance (ΔV) (see Figure 4.6-3)
The voltage-variance between Vr and Vi (



 


) is measured by the voltage-variance relay-
element having a setting [SyncRy1-dV]. If equation (4.6-3) is satisfied together with the
conditions stipulated in equations (4.6-2) and (4.6-3), the SyncRy1-dV relay determines that
the voltage-variance is inside the permissible range.



󰇟
OVR1
󰇠
(4.6-1)


󰇟OVI1󰇠
(4.6-2)



 


󰇟SyncRy1-dV󰇠
(4.6-3)