
6.3.3.4
Lockouts
The Delta VAr Peer to Peer Paralleling Mode includes the following lockouts:
•
Initiator Lockout
•
Non-Initiator Lockout
•
Shared Lockout
Any lockout of the paralleling mode will initiate a Lockout alarm. When a lockout is
active, the unit issuing the lockout will stop any further GOOSE publishing and will stop
load voltage regulation. Also, the alarm can be configured as a DNP event, or as a report
in the case of IEC 61850. The lockout alarm will be displayed on the control front panel
HMI display and in the TCC600 Metering & Status screen.
Initiator lockout
There are two Initiator Lockouts:
1. Non-Initiator Detection Lockout – When the control powers up in Initiator Mode, the
control will wait for approximately 65 seconds to allow all the GOOSE messages
from all the Non-Initiators in the network to reach the Initiator. Once all GOOSE
messages have been received, the Initiator will start its normal algorithm. If within
that initial 65 second period the Initiator does not receive all the GOOSE messages it
expected, it will enter the Initiator Lockout state. This lockout can only be cleared by
the user.
2. Communication Loss Lockout – The Initiator will enter lockout and stop sending
GOOSE messages if it fails to receive any expected messages for three consecutive
Peer to Peer Update Frames. This effectively disables the Peer to Peer paralleling
scheme. This lockout can only be cleared by the user.
Non-initiator lockout
There are two Non-Initiator Lockouts:
1. Initiator Communication Loss Lockout – When the Non-Initiator does not receive a
valid Initiator GOOSE message within the Peer to Peer Update Frame, it will enter the
Non
‑
Initiator lockout state. This lockout can only be cleared by the user.
2. Communication Loss Lockout – A Non
‑
Initiator will enter lockout state and stop
sending its GOOSE messages if it fails to receive any expected messages for three
consecutive Peer to Peer Update Frames. This condition will eventually cause the
Initiator to disable the Peer to Peer paralleling scheme.
Shared lockouts
There are three lockouts that are shared between Initiator and Non-Initiator controls:
1. Tie Breaker Status Conflict Lockout – The Tie Breaker Status Conflict Lockout
activates when a control detects that its status for a tie breaker, shared with another
1VAC388793-MB A
Section 6
Configuration
TCC300
437
User Manual
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