Alstom MiCOM P545 - 2.2.3 Functional assignment; 2.3 InterMiCOM64 statistics & diagnostics; 2.3.1 InterMiCOM64 scheme setup - application

Operation P54x/EN OP/La4
MiCOM P543, P544, P545 & P546 (OP) 5-119
OP
2.2.3 Functional assignment
The settings to control the mode of the intertrip signals are made using the relay’s menu
software. In addition to this, it is necessary to assign InterMiCOM input and output signals in
the relay Programmable Scheme Logic (PSL) editor. Two icons are provided on the PSL
editor of MiCOM S1 (S1 Studio) for Integral tripping In and Integral tripping out which can
be used to assign the eight intertripping commands. The example shown below in Figure 77
sho
ws a Control Input_1 connected to the Intertrip O/P1 signal which would then be
transmitted to the remote end. At the remote end, the Intertrip I/P1 signal would then be
assigned within the PSL. In this example, we can see that when intertrip signal 1 is received
from the remote relay, the local end relay would operate an output contact, R1.
Figure 77 Example assignment of signals within the PSL
Note: When an InterMiCOM signal is sent from the local relay, only the
remote end relay will react to this command. The local end relay will
only react to InterMiCOM commands initiated at the remote end and
received locally, and vice-versa. InterMiCOM can, therefore, be
described as a duplex teleprotection system.
2.3 InterMiCOM
64
statistics & diagnostics
It is possible to hide the channel diagnostics and statistics from view by setting the
Ch Statistics and/or Ch Diagnostics cells to Invisible. All channel statistics are reset
when the relay is powered up, or by user selection using the Reset Statistics cell.
2.3.1 InterMiCOM
64
scheme setup - application
InterMiCOM
64
can be applied to either 2 or 3 ended configurations. By simply mapping the
Tx and Rx signals using the Programmable Scheme Logic (PSL). For mapping of the
InterMiCOM
64
commands in the PSL please refer to Section 2.2.3
For security reasons, two MiCOM P54x relays may be connected in a Dual Redundant
scheme, in which case both channels will be in use. This scheme is also known as a ‘Hot
Standby’ scheme but it should be noted that Channel 1 has no priority over Channel 2 - the
data that arrives first will be stored in the buffer and used in the PSL, whilst the same data
received via the slower channel will simply be discarded.
The InterMiCOM
64
connection for a three ended application is shown in Figure 78.