Power system

A system, comprising:

• at least one controller, wherein in an operating state of a prime mover configured to drive a generator to provide an electrical power to an external load via a power grid coupled to at least one energy storage device, the at least one controller is configured to, at least temporarily, when a power requirement (Pload) of the external load is at least partially provided by the at least one energy storage device.
• receive at least one first signal to determine an amount of the electrical power (PG,i) to be generated by the at least one generator to meet the power requirement (Pload) of the external load;
• and
• control a variable speed (ni) of the prime mover in dependence on the at least one first signal to change a mechanical power generated by the prime mover such that the electrical power provided by the at least one generator approaches the power requirement (Pload) of the external load;
• wherein the at least one controller is configured to control the variable speed (ni) of the prime mover and, at least temporarily, apply an additive or multiplicative feed-forward-control of an actuator of the prime mover proportional to the received at least one first signal to influence the mechanical power generated by the prime mover, wherein the at least one first signal is representative for the electric power provided by the at least one energy storage device to the power grid.

A method to control at least one prime mover having a variable speed (ni), wherein the at least one prime mover is configured generate a mechanical drive force to drive at least one generator to generate an electrical power that is provided to a power grid, wherein the power grid is coupled to an external load and at least one energy storage device, wherein the at least one energy storage device is configured to at least temporarily provide electrical power to the power grid, wherein in situations when a power requirement (Pload) of the external load is at least partially provided by the at least one energy storage device, the method comprises:

• receiving at least one first signal at a controller to determine an amount of electrical power (PG,i) to be generated by the at least one generator to meet a power requirement (Pload) of the external load, wherein the at least one first signal is representative for the electric power provided by the at least one energy storage device to the power grid;
• controlling the variable speed (ni) of the at least one prime mover or a frequency (f) of the power grid in dependence on the at least one signal to change a mechanical power generated by the at least one prime mover such that the electrical power provided by the at least one generator approaches the power requirement (Pload) of the external load;
• and
• applying, at least temporarily, an additive or multiplicative feed-forward-control of an actuator of the at least one prime mover proportional to the received at least one first signal to influence the mechanical power generated by the at least one prime mover.