Electric power system and a method and equipment for controlling the same

An electric power system comprising:

• electric energy sources;
• control equipment configured to activate and deactivate the electric energy sources, the control equipment comprising:
• signal outputs configured to transmit control signals to control the electric energy sources,
• a signal input configured to receive a target value of electric power produced by the electric power system, and
• a controller configured to:
• activate, from among inactive ones of the electric energy sources, one electric energy source in response to a situation in which a control value exceeds an activation limit, the control value being dependent on the target value of the electric power or an actual value of the electric power,
• deactivate, from among active ones of the electric energy sources, one electric energy source in response to a situation in which the control value drops below a deactivation limit, and
• control the active ones of the electric energy sources according to the target value and according to power sharing defined for the active ones of the electric energy sources,
• wherein the controller is further configured to select, from among the inactive electric energy sources, the one electric energy source to be activated based on at least the following:
• temporal lengths of prevailing inactivity periods of the inactive electric energy sources.

A method for controlling an electric power system that includes electric energy sources, the method comprising:

• receiving a target value of electric power produced by the electric power system;
• activating, from among inactive ones of the electric energy sources, one electric energy source in response to a situation in which a control value exceeds an activation limit, the control value being dependent on the target value of the electric power or an actual value of the electric power;
• deactivating, from among active ones of the electric energy sources, one electric energy source in response to a situation in which the control value drops below a deactivation limit;
• and
• controlling the active ones of the electric energy sources according to the target value and according to power sharing defined for the active ones of the electric energy sources,
• wherein the method further comprises selecting, from among the inactive electric energy sources, the one electric energy source to be activated based on at least the following:
• temporal lengths of prevailing inactivity periods of the inactive electric energy sources.

A non-transitory computer-readable medium encoded with a computer program to control an electric power system that includes electric energy sources, the computer program including computer executable instructions to control a programmable processing system to:

• activate, from among inactive ones of the electric energy sources, one electric energy source in response to a situation in which a control value exceeds an activation limit, the control value being dependent on a target value of electric power produced by the electric power system or an actual value of the electric power;
• deactivate, from among active ones of the electric energy sources, one electric energy source in response to a situation in which the control value drops below a deactivation limit;
• and
• control the active ones of the electric energy sources according to the target value and according to power sharing defined for the active ones of the electric energy sources,
• wherein the computer program further comprises computer executable instructions to control the programmable processing system to select, from among the inactive electric energy sources, the one electric energy source to be activated based on at least the following:
• temporal lengths of prevailing inactivity periods of the inactive electric energy sources.