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04/01/2017                                    BEST has successfully produced and tested 200 MVA/330 kV phase-shifting auto transformers.

Phase-shifting transformers are used to control the active power flow in the power grid by regulating phase angles. These phase-shifting auto transformers with HV rated at 330 kV and the LV rated at 161 kV will be used to connect two power grids with different voltage levels in Ghana. Besides having the on-load voltage regulation function at LV side, these auto transformers can also regulate the phase angles between HV and LV through an on load tap changer which performs a special phase-shifting function that can help the user conveniently improve active power distribution between parallel circuits or power grids with different voltages.