Dear Colleagues,

The study of power systems is closely related with symmetry. For example, multiphase power systems are inherently symmetric. The study of symmetrical and asymmetrical faults in power systems is a critical issue. The phase sequence arrangements of multicircuit overhead lines on the same tower directly affects the symmetry of power transmission systems, which influence the operation of power grid and relay protection. Moreover, symmetry is a topic of intensive investigation in the analysis of grid interconnection, including symmetrical and asymmetrical network parameters in smart-grid infrastructures. In renewable energy, the symmetry is present in the layout of wind power plants or photovoltaic plants, among others, while solar systems can have a different performance if they are used with symmetric and asymmetric concentrating CPC collectors.

This Special Issue invites researchers to submit original research papers and review articles related to renewable energy and power systems in which theoretical or practical issues of symmetry are considered. Applied case studies are especially welcome. The topics of interest include but are not limited to:

Symmetry in the topology of power grids;
Symmetry in multiphase/polyphase power systems. Power network synchronization;
Symmetric and asymmetric components;
Symmetrical and asymetrical faults in power systems;
Symmetry analysis of phase sequence arrangements of multicircuit overhead lines;
Symmetry studies of electrical signals using signal processing methods (FFT, DFT, STFT, WT, etc.);
Symmetry in power electronics devices and renewable energy components;
Symmetry in renewable energy systems (including smart-grids and micro-grids);
Symmetrical analysis of power plant layouts and location (including wind farms and photovoltaic plants);
Algorithms for studying symmetry in renewable energy and power systems.

Prof. Raúl Baños
Dr. Alfredo Alcayde
Guest Editors