Method of regulating parallel operation of a plurality of transformers (T1, T2,..., TN) in a parallel circuit, wherein a tap changer with a measuring/control device is associated with each of the transformers (T1, T2,..., TN) and all measuring/control devices are connected together by way of a communications connection, comprising the following steps: - at least one measurement value of the respective measuring/control device of the respective transformers (T1, T2,..., TN) is transferred by way of the communications connection to N-1 measuring/control devices; - calculation of a regulating deviation, which is caused by a circuit reactive current, for each measuring/control device is carried out on the basis of the measurement values of the measuring/control devices; - the tap changer associated with each transformer (T1, T2,..., TN) is so actuated by the measuring/control device as a function of the calculated regulating deviation that minimisation of the circuit reactive current is carried out for the respective transformer (T1, T2,..., TN); characterized by - absence of at least one signal of at least one measuring/control device is caused by interruption of the communications connection at an instant (t) and the absence of the at least one signal of at least one measuring/control device is detected by all remaining measuring/control devices; and - the regulating deviation, which is required for minimisation of a circuit reactive current, of at least one measuring/control device, which is affected by the interruption of the communications connection, of a transformer (T1, T2,..., TN) is determined on the basis of the measurement values which were received by way of the communications connection prior to the instant (t) and which were transferred from the associated measuring/control device of at least one further transformer (T1, T2,..., TN), wherein the individual instantaneously measured measurement values of the measuring/control device, which is affected by the interruption, of at least one transformer are included in the determination. - at least one measurement value of the respective measuring/control device of the respective transformers (T1, T2,..., TN) is transferred by way of the communications connection to N-1 measuring/control devices; - calculation of a regulating deviation, which is caused by a circuit reactive current, for each measuring/control device is carried out on the basis of the measurement values of the measuring/control devices; - the tap changer associated with each transformer (T1, T2,..., TN) is so actuated by the measuring/control device as a function of the calculated regulating deviation that minimisation of the circuit reactive current is carried out for the respective transformer (T1, T2,..., TN); - absence of at least one signal of at least one measuring/control device is caused by interruption of the communications connection at an instant (t) and the absence of the at least one signal of at least one measuring/control device is detected by all remaining measuring/control devices; and - the regulating deviation, which is required for minimisation of a circuit reactive current, of at least one measuring/control device, which is affected by the interruption of the communications connection, of a transformer (T1, T2,..., TN) is determined on the basis of the measurement values which were received by way of the communications connection prior to the instant (t) and which were transferred from the associated measuring/control device of at least one further transformer (T1, T2,..., TN), wherein the individual instantaneously measured measurement values of the measuring/control device, which is affected by the interruption, of at least one transformer are included in the determination.