Integration of large scale wind farm into electrical grids

In Europe, China and around the world many large wind farms have been installed and more have been planned. The wind farm installations must meet the Grid Code requirements for connections. Many difficulties have been encountered in meeting these requirements, especially for fault ride through, active power and frequency control, reactive power and voltage control requirements. This paper reviews the associated challenges for integration of large scale wind power into grids and investigates the development of Grid Codes from different countries. For existing problems the paper describes some solutions for connection of large scale wind power with power gird. These solutions include establishing accuracy wind power forecasting through advanced wind energy management system, making feasible connection comparison and selection and developing energy storage technologies to provide adequate margin to achieve the power balance and mitigate the impact of wind power intermittence.