Control parameter optimization for multiple distributed generators in a microgrid using particle swarm optimization

Microgrids are state‐of‐the‐art power distribution networks consisting of multiple distributed generators (DGs) and sensitive power loads. The goal of microgrid operation is to provide reliable and high‐quality electric power to loads regardless of abnormal cases such as faults or loss‐of‐mains (islanding). This paper presents power control methods to coordinate multiple microgrid generators for both grid‐connected and autonomous modes. To maintain required control performance and power quality during operating condition changes, hard toil of fine‐tuning control parameters is required. This paper proposes an effective control parameter‐tuning method using the particle swarm optimization (PSO) algorithm and gain‐scheduling method. System requirements such as power quality regulation and load following performance are reflected in the cost function. The optimization algorithm implementation with time‐domain simulation model is also explained.