Impact of wind variability on weakly interconnected power systems

The inherent variability and uncertainty of wind power generation is a major issue for countries attempting to harness large quantities of wind-based renewable energy. Such properties of wind make optimal balancing of demand and generation a much more complex task. Clearly the flexibility of thermal plant in the electrical power system is of key importance, especially in smaller systems with high penetrations of wind power, as is the role of interconnectors with neighbouring countries. This paper examines the power system of Ireland as a test case for systems with high wind penetrations and limited interconnection to neighbouring countries, such that wind variability must be managed using indigenous methods. The analysis highlights problems other power systems will encounter as they in turn reach high penetrations of wind generation.