Performance and Robustness Evaluation of the Resonance Suppression Strategy for the Photovoltaic Grid-Connected System Based on the Entropy Weight Method

There are numerous broadband resonance phenomena during the operation of new energy grid-connected systems. Therefore, the performance and adaptability of resonance suppression strategies for different resonance scenarios are of great significance. This paper proposed a comprehensive evaluation method based on the entropy weight method to assess the performance and robustness of resonance suppression strategies for photovoltaic (PV) grid-connected systems. Corresponding performance indicators were constructed considering the dynamic response characteristics of PV grid-connected systems. The six suppression strategies were comparatively analyzed in terms of performance and robustness under three scenarios: the LCL (inductor–capacitor–inductor)-type PV grid-connected system, the PV grid-connected system with SVG, and the newly built PV grid-connected system with SVG. This work effectively evaluates the performance and robustness of different suppression strategies, identifies the deficiencies of individual strategies, and provides a theoretical basis for designing flexible resonance suppression strategies with parameter adaptability.