Pilot-Bus-Centered Automatic Voltage Control With High Penetration Level of Wind Generation

The increasing wind power penetration level affects the performance of automatic voltage control (AVC) on voltage regulation. Previous studies indicated that pilot-bus selection and the partitioning method have the potential to improve the performance of AVC in maintaining the desired voltage profile. However, due to the dynamic and intermittent nature of wind generation, it is necessary to establish systematic pilot-bus selection criteria to enhance the effectiveness of AVC under high penetration level of wind power. This paper proposes a new approach for pilot-bus selection that considers both the physical response of generators and the wind power fluctuation. A new pilot-bus-centered partitioning method is also developed based on the newly defined electrical distance reflecting the controllability of pilot buses to load buses. Case studies based on the New England 39-bus system are provided to illustrate the effectiveness of the proposed approaches.