Improved GRA-based Evaluation for Autonomous Operation Capability of AC/DC Distribution System

In this study, a new evaluation method using improved grey relational degree analysis (GRA) is proposed to evaluate the autonomous operation capacity of an AC/DC distribution system. The proposed scheme is implemented based on the entropy method and an improved GRA. This paper considers that: 1) analyzing the key factors affecting the autonomous operation capability of AC/DC power distribution system; 2) establishing a comprehensive evaluation index system from generation side, grid side, load side and storage side; and 3) using an improved GRA based on entropy method to achieve quantitative assessment. Simulation results are presented and compared to verify the effectiveness of the evaluation method.