KETEP 세계에너지시장정보

1. A method for controlling a plurality of renewable energy generators of a renewable energy power plant, the method comprising: determining preliminary reactive power set points for the generators based on a reactive power reference value for the power plant; determining generator-based reactive power limits and voltage-based reactive power limits for the generators; generating dispatch signals for requesting reactive power from the generators, the dispatch signals being generated based on the preliminary reactive power set point and the determined reactive power limits; and dispatching the dispatch signals to the generators; wherein the generator-based reactive power limit for each generator corresponds to the reactive power capabilities of the generator, and wherein determining the voltage-based reactive power limits comprises, for each generator: determining a terminal voltage of the renewable energy generator; comparing the determined terminal voltage to a voltage limit; and determining the voltage-based reactive power limit based on the comparison, and wherein determining the voltage-based reactive power limit comprises determining a voltage sub-range of an allowable voltage range, the voltage sub-range being bounded by the voltage limit, and, in response to the terminal voltage for a generator being within the voltage sub-range, determining the voltage-based reactive power limit for that generator to prevent further change of the terminal voltage towards the voltage limit.