Load tap changer on Primary
Load tap changer on Primary
(OP)
Hello Everyone,
Does the controller on the on load tap changer of a power transformer always monitors the voltage on the secondary side no matter if the tap changer is on the primary or secondary side?
Thank you and best regards,
Does the controller on the on load tap changer of a power transformer always monitors the voltage on the secondary side no matter if the tap changer is on the primary or secondary side?
Thank you and best regards,






RE: Load tap changer on Primary
RE: Load tap changer on Primary
RE: Load tap changer on Primary
Distribution voltage regulators work a bit differently than LTCs since the source side may change during distribution switching. Many regulators have the capability to regulate the voltage on either side of the regulator. The controller can be programmed to recognized which way power is flowing and adjust the control scheme accordingly. Some controllers can even automatically determine which side has the "fixed" voltage my moving a couple of taps and then looking at the resulting voltages. Some vendors sell the same controller for both LTCs and regulators, so there may be more options available than should actually be used for any specific situation.
I assume you were asking for just distribution substation transformers. For LTCs on transmission banks, the control scheme may be based on both primary and secondary voltages as well as voltage and reactive flows at adjacent substations.