Research on Power Quality Assessment of Wind Power Grid-Connected Systems Based on Game Theory Combination Weighting

With the large-scale integration of wind power into the grid in recent years, the power quality pollution in power systems has been deteriorating increasingly. The existing assessment methods are hardly applicable to wind power grid-connected systems. Therefore, to enhance the power supply quality of the grid, this paper proposes a power quality assessment method based on game theory combination empowerment. According to the characteristics of wind power generation and power quality issues, this paper establishes a set of evaluation index systems applicable to wind power grid-connected systems. Then, the G1 method and the improved CRITIC method are used to obtain the subjective and objective weights of each evaluation index. The idea of game theory is introduced to linearly combine the two, thereby obtaining the final weights of the power quality indexes. Subsequently, the TOPSIS method is employed to solve the problem, and the grey system theory is introduced to avoid the situation where it is impossible to distinguish the superiority and inferiority of samples when the closeness is equal, making the assessment results more reasonable. The results show that the method is reasonable and effective and can be applied well in the field of power quality assessment for wind power grid-connected systems, which has certain reference and research significance.