Method for controlling power ramps with prediction in intermittent power generation plants

A method for controlling power ramps with prediction in intermittent power generation plants, which minimizes energy storage requirements in intermittent power generation plants guaranteeing at all times compliance with a maximum admissible ramp value for the power being fed into a grid, PG(t), given by a grid code regulation, or other instrument, wherein the method comprises:

• a stage for calculating the maximum plant power, PMax(t), and the minimum plant power PMin(t), of the instantaneous power generated by the intermittent power generation plant, P(t), in a prediction time horizon, the maximum plant power being, PMax(t), and the minimum plant power being, PMin(t), the maximum and minimum power, respectively, being those that can be produced in the intermittent power generation time during that prediction time horizon, wherein in each t moment the energy required to achieve the maximum plant power, PMax(t), and the minimum power of the plant, PMin(t), is also calculated in said prediction time horizon;
• a stage for determining the maximum possible fluctuation that can occur in the instantaneous power generated by the intermittent power generation plant, P(t), wherein the maximum possible fluctuation is one of the two following fluctuations:
• a positive fluctuation, calculated between the instantaneous power, P(t), and the maximum plant power, PMax(t), and a negative fluctuation calculated between the instantaneous power, P(t), and the minimum plant power, PMin(t);
• a stage for dynamically calculating the state of charge of an energy storage system required to support the maximum possible fluctuation SOCmpf(t);
• and
• a stage for determining a stabilized state of charge, SOCsta(t), of the storage system, wherein the stabilized state of charge, SOCsta(t), is calculated as the state of charge of the energy storage system required to support the maximum possible fluctuation SOCmpf(t), plus a term that takes into account the energy required by the power being fed into the grid, PG(t), to reach the instantaneous power, P(t), generated by the intermittent power generation plant.