Static electric induction system and method

A method of controlling a static electric induction system comprising a heat generating electric component, a dielectric cooling fluid, a cooling passage structure along the electric component, a winding, wherein the electric component is a cable turn of the winding, and wherein the cooling passage structure is arranged along the winding from a bottom part of winding to a top part of the winding, and a pump arrangement arranged to pump the dielectric cooling fluid, wherein the dielectric cooling fluid is a dielectric liquid with Prandtl number above 20 in a temperature range of operation of the electric component, and wherein the method comprises:

• controlling the pump arrangement in a first mode to pump the cooling fluid such that the dielectric cooling fluid is driven through the cooling passage structure in a forward direction to cool the electric component;
• and
• controlling the pump arrangement in a second mode to pump the cooling fluid such that the dielectric cooling fluid is driven through the cooling passage structure in a reverse direction, opposite to the forward direction, to cool the electric component, wherein the cooling fluid alternatingly flows generally upward and generally downwards through the winding via the cooling passage structure in response to alternating between the first mode and the second mode.