The $$\{K_2,C_n\}$$ -factor of a graph is spanning subgraph whose each component either $$K_2$$ or $$C_n$$ . In this paper, sufficient condition with regard to tight toughness, isolated toughness and binding number bounds guarantee the existence $$\{K_2,C_{2i+1}| i\geqslant 2 \}$$ for any obtained, which answers problem due Gao Wang (J Oper Res Soc China, 2021. https://doi.org/10.1007/s40305-02...

This paper presents a new reliable algorithm of loss of mains detection for distributed generation. One of the technical issues created by DG interconnection is inadvertent islanding. Islanding occurs when a portion of the distributed system becomes electrically isolated from the remainder of the power system, yet continues to be energized by DG connected to the isolated subsystem. It can be de...

The motivation to develop microgrids (MG), as a particular form of active networks is explained and presented as an effective solution for the control of grids. In MGs, with high level of penetration of Distributed Energy Resources, the stability becomes an important issue. Some control characteristics of elements such as droop coefficients in VSI highly affect voltage and frequency stability. ...

This paper deals with the problem of voltage security in microgrids. In general, voltage security is an issue for power systems, where the lack of reactive power is a concern. For microgrids a complexity is imposed, since frequency and voltage level deviations may take place by the operation of droop-controlled inverters. This paper incorporates the load margin calculation into a microgrid stru...

Flywheels can be used as storage elements in islanded power systems and, as a special case, in isolated wind plants, especially those running at almost constant speed and included as a component in diesel groups. Nowadays, systems with variable speed are under development, so the amount of available energy in the flywheel is highly increased. In this paper, a variable speed flywheel based on hy...

This article concerns research ethics in small, insular communities such as islands and other locales islanded by topography and/or isolation. Using the Faroe Islands case, point of departure is a discussion how islanders navigate multiple relations this might impact ethics. Because island/islanded can be highly interwoven complex, argues for situated that grounded relations. Most codes are Wes...