Method of Performing Circuit Opening and Closing Operation, Computer Program, Control System and Power System

A method of performing a circuit opening and closing operation in a power system having a first phase, a second phase), and a third phase, the method including a) opening only a reference phase among the first phase, the second phase and the third phase such that a reference current of the reference phase is interrupted at a first current zero crossing after the opening; b) opening the remaining phases after step a); c) closing only the reference phase and a phase lagging the reference phase by 120° simultaneously or essentially simultaneously at a closing phase angle of a phase to ground voltage of the reference phase of 320°±70° when the current zero crossing is a positive current zero crossing, or of 140°±70° when the current zero crossing is a negative current zero crossing; and d) closing the phase lagging the reference phase by 240° after step c).