Reservation Function (Qcrsv And Resin) - ABB REG670 Applications Manual

Section 15
Control
15.2.1.5
506
Table 54: Possible cause values from XLNPROXY
Cause Cause Description
No
8 Blocked-by-Mode
2 Blocked-by-switching-hierarchy
-24 Blocked-for-open-cmd
-25 Blocked-for-close-cmd
9 Blocked-by-process
5 Position-reached
-31 Switch-not-start-moving
-32 Persistent-intermediate-state
-33 Switch-returned-to-init-pos
-34 Switch-in-bad-state
-35 Not-expected-final-position
The OPCAP input and output are used for the CBOpCap data of a
XCBR respectively SwOpCap for a XSWI. The interpretation for the
command following is controlled through the setting SwitchType.

Reservation function (QCRSV and RESIN)

The purpose of the reservation function is primarily to transfer interlocking
information between IEDs in a safe way and to prevent double operation in a bay,
switchyard part, or complete substation.
For interlocking evaluation in a substation, the position information from switching
devices, such as circuit breakers, disconnectors and earthing switches can be required
from the same bay or from several other bays. When information is needed from other
bays, it is exchanged over the station bus between the distributed IEDs. The problem
that arises, even at a high speed of communication, is a space of time during which the
information about the position of the switching devices are uncertain. The
interlocking function uses this information for evaluation, which means that also the
interlocking conditions are uncertain.
To ensure that the interlocking information is correct at the time of operation, a unique
reservation method is available in the IEDs. With this reservation method, the bay that
wants the reservation sends a reservation request to other bays and then waits for a
reservation granted signal from the other bays. Actual position indications from these
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Conditions
The BEH input is 5.
The LOC input indicates that only local commands are
allowed for the breaker IED function.
The BLKOPN is active indicating that the switch is blocked
for open commands.
The BLKCLS is active indicating that the switch is blocked
for close commands.
If the Blk input is connected and active indicating that the
switch is dynamically blocked. Or if the OPCAP input is
connected, it indicates that the operation capability of the
switch is not enough to perform the command.
Switch is already in the intended position.
Switch did not start moving within tStartMove.
The switch stopped in intermediate state for longer than
tIntermediate.
Switch returned to the initial position.
Switch is in a bad position.
Switch did not reach the expected final position.
1MRK 502 071-UEN -
Application manual