**Author details**

Sergio Martin-Martínez1 , Antonio Vigueras-Rodríguez2 , Emilio Gómez-Lázaro1 , Angel Molina-García3 , Eduard Muljadi4 and Michael Milligan4

1 Renewable Energy Research Institute, Universidad de Castilla-La Mancha, Albacete, Spain

2 Renewable Energy Research Institute, Albacete Science and Technology Park and Univer‐ sidad de Castilla-La Mancha, Albacete, Spain

3 Department of Electrical Engineering, Universidad Politécnica de Cartagena, Cartagena, Spain

4 National Renewable Energy Laboratory, Golden, Colorado, USA; Michael Milligan, Na‐ tional Renewable Energy Laboratory, Golden, Colorado, USA
