Frequency behavior of variable renewable energy sources during power deficiency events; comparative study

Abstract

Integrating large scale variable renewable energy sources (VRESs) such as solar photovoltaic generation plants and wind farms, with electric power systems achieve many targets, i.e. economic, environmental, and technical. VRES also presents new generation technologies to the traditional grid. These technologies behavior should be studied in depth during grid normal and abnormal conditions. Solar Photovoltaic Generation (SPVG) is a common solar energy applications. Whereas, wind farms of a variable speed wind turbine with a Doubly Fed Induction Generator (DFIG) have a great potential among different wind turbine technologies. This paper presents a comparative study between traditional synchronous, SPVG and DFIG responses during substantial power deficiency cases. This study summarizes the main features of each technology frequency behavior. The study also suggests several recommendations for stabilizing the grid frequency with large scale VRES.