Research on dynamic stability of hybrid wind/PV system based on Micro-Grid

Renewable energy power generation technology, such as wind power and PV system, has developed rapidly nowadays. The wind/PV hybrid system has become a promising power generation form due to the natural complementary character of wind power and PV power. Storage devices are usually equipped in the hybrid system to constitute Micro-grid through appropriate energy management strategies to improve the reliability of the power supply. To investigate the system operating stability, a small-signal model of the hybrid wind/PV system based on micro-grid is proposed and established in this article. The model is applied to (i) small-signal analysis of the hybrid wind/PV system for identifying the reliable operating points, and (ii) design and optimize the system control strategies. The simulation results from the Matlab/Simulink environment show the model is accurate and feasible. The research in this article provides a theoretical foundation and practical method for dynamic stability analysis and control of the hybrid wind/PV system based on micro-gird.