Alstom MiCOM P54 Series - 8.4.4 Distance protection scheme testing

Commissioning P54x/EN CM/La4
MiCOM P543, P544, P545 & P546
CM) 10-45
CM
8.4.4 Distance protection scheme testing
The relay will be tested for it’s response to internal and external fault simulations, but the
engineer must note that the response will depend upon the aided channel (pilot) scheme that
is selected. For a conventional signaling scheme, the table overleaf indicates the expected
response for various test scenarios, according to the scheme selection, and status of the
opto-input that is assigned to the Aided Receive Ext channel receive for the distance
scheme. The response to the “Reset Z1 Extension
” opto is shown in the case of a Zone 1
Extension scheme.
Testing of the P54x distance scheme is detailed in the case of conventional signaling
scheme implementation as it is expected that the signaling will be independent to that of the
communication for the phase differential protection. In the case where an InterMiCOM
64
scheme is being employed to provide the signaling, it may be that the scheme logic does not
use opto-inputs for the aided scheme implementation and that internal logic signals (DDBs)
will need to be set/reset in order to test the operation of the protection scheme. The IM64
Test Mode in conjunction with the IM64 Test Pattern should be used to assert/monitor the
relevant signals.
Ensure that the injection test set timer is still connected to measure the time taken for the
relay to trip. A series of fault injections will be applied, with a Zone 1, end-of-line, or Zone 4
fault simulated. At this stage, merely note the method in which each fault will be applied, but
do not inject yet:
 Zone 1 fault
: A dynamic forward A-B fault at half the Zone 1 reach will be
simulated.
 End of line fault
: A dynamic forward A-B fault at the remote end of the line will be
simulated. The fault impedance simulated should match the
[3003: Line Impedance] setting in the LINE PARAMETERS
menu column.
 Zone 4 fault
: A dynamic reverse A-B fault at half the Zone 4 reach will be
simulated.
RELAY RESPONSE
Fault type
simulated
Forward fault in
zone 1
Forward fault at end
of line
(within Z1X/Z2)
Reverse fault in
zone 4
Signal
receive opto
ON OFF ON OFF ON OFF
Zone 1
extension
Trip Trip No Trip Trip No Trip No Trip
Blocking
scheme
Trip,
No Signal
Send
Trip,
No Signal
Send
No Trip,
No Signal
Send
Trip,
No Signal
Send
No Trip,
Signal
Send
No Trip,
Signal
Send
Permissive
Scheme
(PUR/PUTT)
Trip,
Signal
Send
Trip,
Signal
Send
Trip,
No Signal
Send
No Trip,
No Signal
Send
No Trip,
No Signal
Send
No Trip,
No Signal
Send
Permissive
Scheme
(POR/POTT)
Trip,
Signal
Send
Trip,
Signal
Send
Trip,
Signal
Send
No Trip,
Signal
Send
No Trip,
No Signal
Send
No Trip,
No Signal
Send