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With growing diffusion of DC microgrids, ground faults in the DC section of networks will become more and more likely. This is mainly due to the expected increase in size of such networks. Ground faults may involve significantly high currents, which may not be limited by front-end converters (FECs). The work presented in this paper is focused on the analysis of normal and faulty operation of a DC...
The paper describes a joint university-industry project aimed at defining hardware and software requirements for the development of a prototypical microgrid platform on existing sites able to manage generation resources and load. The paper describes an architecture developed for integrating existing software tools for on-line load monitoring and control and for management of in-site generation. The...
Probabilistic Risk Assessment (PRA) techniques are raising more and more interest in the context of the operation of high voltage transmission networks because they represent a new approach to the security assessment in power system operation. The classical deterministic methods, which compare the power system performance to a predefined set of requirements (e.g. no current and voltage violations,...
The liberalization of the electricity markets causes power systems to work closer and closer to their limits. The online assessment of system security becomes a topic of paramount importance in control centers. In this context fast indices to quickly assess system security are fundamental in an on-line DSA session. This paper considers three voltage stability indices recently proposed in literature...
The paper is aimed at focusing the influence and more in general benefits and problems that medium size wind turbines, photovoltaic power plants, and small cogenerative generators embedded in a radial distribution network can produce regarding voltage profiles and power balance. In particular the novel capability of wind turbines to reduce active power in case of over-frequency is analyzed. This feature...
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