Frequency Control Analysis of Shipboard Microgrid Utilizing IST2E Based PID Controller Considering Load Disturbance Rejection Mode

In recent years, shipboard power systems are developing to meet the challenges of minimizing environmental effects and making the best use of energy sources, especially with regard to minimize greenhouse gas emissions. The integration of renewable energy sources into shipboard power systems is becoming increasingly popular due to the rapid advancement of renewable energy technologies. However, irregularities in the generation from renewable energy sources, causes deviations in frequency. To tackle with this issue, frequency control of shipboard microgrid is performed in this study using PID controller with aim of disturbance rejection. To fine-tune the PID controller parameters, the study uses integral-square-time-square-error based tuning rules for load disturbance rejection (LDR). The research presents and discusses the frequency analysis of shipboard microgrids with controllers based on integral square time square error method for LDR mode. A comparative study is conducted to enhance understanding of the outcomes, providing time domain specifications for shipboard microgrid with and without integral square time square error method based PID controller.