If the quality of the position or the communication becomes bad, the command evaluation
replaces the uncertain position value with intermediate position. Thus, as long as the quality is
bad, all commands will result in the cause Persistant-intermediate-state, -32.
If the switch in the merging unit has the behaviour set to Test or Test blocked, when the IED
has the behaviour On or Blocked, all data from the switch is regarded as invalid. Thus, any
command will fail with the cause PersistantiIntermediate-state, -32, and if selection is used for the
switch, all attempts to select the connected SCSWI will fail with the cause Select-failed, 3, from the
SCSWI.
It is possible to speed up the command response for when the command has been started by the
switch in the breaker IED by connecting the inputs OPOK and OPOK_VAL. Then the blocking check
is only done until OPOK is activated and confirmation of that the command has been started is
given to the SCSWI function.
If the inputs STSELD and STSELD_V are connected, the switch in the breaker IED is assumed to use
selection. Then the SCSWI will wait for a selected indication, STSELD input of XLNPROXY, before
accepting selection, this information is transferred to the SCSWI function from the XLNPROXY
through the group connection XPOS. If STSELD is not activated within
tSelect
of the SCSWI
function, the selection is deemed failed and it gives a negative selection acknowledgement to the
command issuer with the cause Select-failed. Further, if the communication is lost, or the data
received is deemed invalid, the selection will also fail with cause Select-failed from the SCSWI.
14.3.10 Bay reserve QCRSV
IP15629-1 v2
14.3.10.1 Functionality
M13506-3 v4
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.
14.3.10.2 Function block
M13509-3 v3
IEC05000340-2-en.vsd
QCRSV
EXCH_IN
RES_RQ1
RES_RQ2
RES_RQ3
RES_RQ4
RES_RQ5
RES_RQ6
RES_RQ7
RES_RQ8
BLK_RES
OVERRIDE
RES_DATA
RES_GRT1
RES_GRT2
RES_GRT3
RES_GRT4
RES_GRT5
RES_GRT6
RES_GRT7
RES_GRT8
RES_BAYS
ACK_TO_B
RESERVED
EXCH_OUT
IEC05000340 V2 EN-US
Figure 455: QCRSV function block
Section 14 1MRK 502 066-UUS B
Control
860
Technical manual
To Next Page
Loading...
