A method is for regulating system frequency in a weak power system (10). The weak power system includes a power generator (12), a static synchronous compensator (14) and an energy storage device (16), where the weak power system (10) is connected to an electrical network (22) and the power generator (12) is operable to generate power for presentation to the electrical network (22). The method comprises the steps of: following a change in load of the electrical network (22), simultaneously modifying a power output of the power generator (12) to match the load of the electrical network (22) and operating the static synchronous compensator (14) to control the energy storage device (16) to either supply real power to the electrical network (22) or absorb real power from the power generator (12).
