A method for controlling a power generation plant comprising a number of generators connected to an electric power grid, the method being characterized in that: wherein for each generator a voltage set point (|V ter | ref) for a terminal voltage magnitude (|V ter |) at a terminal of the generator and a power set point (P ref) for the active power generated by the generator are fed to a control means of the generator, where the control means adjusts in subsequent control steps a reactive current (I d) and an active current (I q) provided by the generator so that the terminal voltage magnitude (|V ter |) and the active power reach the voltage and power set points (|V ter | ref, P ref), wherein in each control step: i) the reactive current (I d) is estimated for the voltage and power set points (|V ter | ref, P ref) based on an electric circuit model of the generator and the power grid, resulting in an estimated reactive current value (I de); ii) if the estimated reactive current value (I de) fulfils a threshold exceeding criterion, the voltage and/or the power set points (|V ter | ref, P ref) are varied, where the threshold exceeding criterion is always met when the estimated reactive current value (I de) exceeds a maximum reactive current value (I dmax) or falls below a minimum reactive current value (I dmin); iii) the control means adjusts the reactive current (I d) and active current (I q) based on the voltage and/or the power set points (|V ter | ref, P ref) as obtained after step ii). wherein for each generator a voltage set point (|V ter | ref) for a terminal voltage magnitude (|V ter |) at a terminal of the generator and a power set point (P ref) for the active power generated by the generator are fed to a control means of the generator, where the control means adjusts in subsequent control steps a reactive current (I d) and an active current (I q) provided by the generator so that the terminal voltage magnitude (|V ter |) and the active power reach the voltage and power set points (|V ter | ref, P ref), wherein in each control step: i) the reactive current (I d) is estimated for the voltage and power set points (|V ter | ref, P ref) based on an electric circuit model of the generator and the power grid, resulting in an estimated reactive current value (I de); ii) if the estimated reactive current value (I de) fulfils a threshold exceeding criterion, the voltage and/or the power set points (|V ter | ref, P ref) are varied, where the threshold exceeding criterion is always met when the estimated reactive current value (I de) exceeds a maximum reactive current value (I dmax) or falls below a minimum reactive current value (I dmin); iii) the control means adjusts the reactive current (I d) and active current (I q) based on the voltage and/or the power set points (|V ter | ref, P ref) as obtained after step ii). i) the reactive current (I d) is estimated for the voltage and power set points (|V ter | ref, P ref) based on an electric circuit model of the generator and the power grid, resulting in an estimated reactive current value (I de); ii) if the estimated reactive current value (I de) fulfils a threshold exceeding criterion, the voltage and/or the power set points (|V ter | ref, P ref) are varied, where the threshold exceeding criterion is always met when the estimated reactive current value (I de) exceeds a maximum reactive current value (I dmax) or falls below a minimum reactive current value (I dmin); iii) the control means adjusts the reactive current (I d) and active current (I q) based on the voltage and/or the power set points (|V ter | ref, P ref) as obtained after step ii).