Offshore wind power system toughness improving method based on influence increment

The embodiment of the invention provides a method for improving the toughness of an offshore wind power system based on influence increment, and relates to the technical field of offshore wind power systems. The method comprises the following steps: S1, carrying out probability modeling on the influence of typical disasters, and calculating the fault probability of the line of the offshore wind power system; s2, system toughness is calculated based on the probability that the line breaks down; s3, calculating a new toughness index R based on the influence increment and the system toughness; s4, calculating the sensitivity dR/(dpk) of the system toughness to the fault probability change of different lines; and S5, arranging the strengthening priority for the lines according to the sequence of the sensitivity dR/(dpk) from large to small. According to the method, an offshore wind power system toughness evaluation process and a system toughness strengthening process based on the influence increment are designed