A limitation of the interaction between cascaded tap changers and/or between a tap changer and a shunt compensator independently of any real-time communication between the respective controllers is disclosed. Coordinated voltage control in distribution networks can be achieved by an adaptive updating or tuning of control parameters DB4, TD4 of a voltage control unit controlling a second voltage control device, depending on instantaneous or actual operating conditions evaluated by the voltage control unit itself. Instead of using constant control parameters initially set by a commissioning engineer, the parameters are updated based on a voltage level UP4, which in turn is responsive to or affected by any control action performed by a first voltage control device neighboring the second voltage control device. The voltage control unit calculates a deviation of an instantaneous value of the voltage level from a reference value, and translates or maps this deviation to an update of its dead bands and/or time delay characteristics. Hence, the voltage control unit can anticipate, or determine a likelihood of, a control action of the first voltage control device, without the need for a real-time transmission of this information to the voltage control unit.