ABB TCC300, User Manual, Page: 435 / 716

6.3.3 Optional delta VAR peer to peer parallelling method
The Delta VAr Peer to Peer Paralleling method utilizes the difference in VArs between the
VAr contribution of an individual transformer and the average number of VArs (the sum
of VArs in the paralleled transformers, divided by the number of transformers paralleled)
produced in a parallel configuration. The difference in VArs is then converted to an
equivalent bias voltage. This bias voltage is utilized to proportionally increase or decrease
the control center band of the control based on the VAr deficiency or excess.
The Delta VAr Peer to Peer Paralleling method employs the GOOSE messaging element
of the IEC 61850 protocol to provide peer to peer communications. The paralleling
configuration consists of one Initiator (INI) control that holds the highest network address
and up to 15 Non
‑
Initiator (NINI) controls on the same network. All of the controls
perform their own calculations based on the information being passed between the
controls using the peer to peer communications. Once a control has been determined to be
the Initiator, it starts (initiates) the parallel calculations in the network (or sub-network) of
Non-Initiator controls.
The Delta VAr Peer to Peer settings are available to be changed individually on each
control through Setup/Configuration/Paralleling. Also included is the Delta VAr Peer to
Peer Paralleling Configuration Tool which contains the editable settings for each
individual control in the Delta VAr Peer to Peer paralleling network.
1VAC388793-MB A
Section 6
Configuration
TCC300 429
User Manual