ABB RELION 650 SERIES, Руководство по применению

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Section 10 Control
10.1 Synchronism check, energizing check, and synchronizing
SESRSYN (25)
IP14558-1 v4
10.1.1 Identification
M14889-1 v4
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Synchrocheck, energizing check, and
synchronizing
SESRSYN
sc/vc
SYMBOL-M V1 EN-US
25
10.1.2 Application
10.1.2.1 Synchronizing
SEMOD171992-5 v6
To allow closing of breakers between asynchronous networks a synchronizing function is
provided. The breaker close command is issued at the optimum time when conditions across the
breaker are satisfied in order to avoid stress on the network and its components.
The systems are defined to be asynchronous when the frequency difference between bus and line
is larger than an adjustable parameter. If the frequency difference is less than this threshold value
the system is defined to have a parallel circuit and the synchronism check function is used.
The synchronizing function measures the difference between the V-Line and the V-Bus. It operates
and enables a closing command to the circuit breaker when the calculated closing angle is equal to
the measured phase angle and the following conditions are simultaneously fulfilled:
• The measured voltage V-Line is higher than 80% of
GblBaseSelLine and the measured voltage
V-Bus is higher than 80% of
GblBaseSelBus.
• The voltage difference is smaller than 0.10 p.u, that is (V-Bus/ GblBaseSelBus) - (V-Line/
GblBaseSelLine) < 0.10.
• The difference in frequency is less than the set value of FreqDiffMax and larger than the set
value of
FreqDiffMin. If the frequency is less than FreqDiffMin the synchronism check is used
and the value of
FreqDiffMin must thus be identical to the value FreqDiffM resp FreqDiffA for
synchronism check function. The bus and line frequencies must also be within a range of +/- 5
Hz from the rated frequency. When the synchronizing option is included also for autoreclose
there is no reason to have different frequency setting for the manual and automatic reclosing
and the frequency difference values for synchronism check should be kept low.
• The frequency rate of change is less than set value for both V-Bus and V-Line.
• The closing angle is decided by the calculation of slip frequency and required pre-closing time.
1MRK 505 287-UUS B Section 10
Control
Busbar protection REB650 115
Application manual
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