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Question about transformer and on-load tap changers (OLTCs)

meyra meyira

Feb 7, 2018
Feb 7, 2018

I have a network with hundreds of busbars (ranging from 33kV to 6.6kV). I have some electrical loads connected at the far end of the network via 2-winding transformers and I am analysing the voltage drops at the point of load connections.

Some of these busbars experience around 10% voltage drops (0.90 pu) therefore I want to add tap changers on my transformers (I am using IPSA simulation tool). There are some settings I need to change as follows:

Basic tap data:
Setting (%) = Current tap position
Minimum (%) = Minimum tap position
Maximum (%) = Maximum tap position
Step (%) = Tap change increment

Which of these should I vary to improve voltage profiles? Also what are the ideal values I should set for the above data?