Load Frequency Control of Islanding Micro-Grid with High-Proportional Renewable Energy Based on Desired Dynamics Equation

Abstract

A proportional-integral-derivative (PID) control strategy based on desired dynamics equation is proposed to solve the problem of load frequency control in micro-grid integrated with a large proportion of renewable energy. Based on the analysis of the load frequency control model and control difficulties of the micro-grid, a PID control strategy based on desired dynamics equation is designed. By analyzing the influence of controller parameters on the control performance using the single variable method, a simple and practical parameter procedure is summarized and the proposed controller strategy is applied to the load frequency control of the micro-grid. The simulation comparison with various controllers under different conditions show that the proposed control strategy can obtain the best control performance with good robustness and have a significant value for engineering application.

Keywords

• micro-grid
• load frequency control
• desired dynamics equation
• proportional-integral-derivative (pid)
• parameter tuning