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Figure 4.5-4 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.
‡
Setting Name
Description
SyncRy1-Angle
Checking angle variance
SyncRy1-dV
Checking voltage variance
SyncRy1-df
Checking frequency variance
SyncRy1-TCB
Advance time for SYNCHK01
SYNC01_TSYN
Sync check timer for loop system
SyncRy1-dfEN
Diff. frequency for the checking SyncRy1 enable
Synchronism-relays (SyncRy1-dV, SyncRy1-df, SyncRy1-dθ)
(i)
Synchronism-relays, SyncRy1-dV, SyncRy1-df, and SyncRy1-dθ are provided; the setting
ranges for these relays are shown in Table 4.5-2.
Voltage-variance (ΔV) (see Figure 4.5-3)
The voltage-variance between Vr and Vi ( | ��
element having a setting [SyncRy1-dV]. If equation (4.5-3) is satisfied together with the
conditions stipulated in equations (4.5-2) and (4.5-3), the SyncRy1-dV relay determines that
the voltage-variance is inside the permissible range.
Δ increasing
V i
V i ‡
Δ
Table 4.5-2 Settings in SYNCHK_Ry1
≥ Setting [ OVR1 ]
��
r
��
≥ Setting[OVI1]
i
| ��
| ≤ Setting[SyncRy1-dV]
− ��
��
��
- 599 -
Δ reducing
Δ near
zero
V i
V i
V r †
Default
30 degrees
150V
1Hz
–
10s
Off
| ) is measured by the voltage-variance relay-
− ��
��
��
6F2T0207 (0.01)
Setting item or value
0 to 75 degrees
0 to 150 V
0.01 to 2 Hz
Seconds
0.00 to 100.00 s
Off / On
(4.5-1)
(4.5-2)
(4.5-3)
GRE200 (5,6)
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